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Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Method for releasing hydrogen from ammonia borane  

DOE Patents [OSTI]

A method of releasing hydrogen from ammonia borane is disclosed. The method comprises heating an aqueous ammonia borane solution to between about 80-135.degree. C. at between about 14.7 and 200 pounds per square inch absolute (psia) to release hydrogen by hydrothermolysis.

Varma, Arvind; Diwan, Moiz; Shafirovich, Evgeny; Hwang, Hyun-Tae; Al-Kukhun, Ahmad

2013-02-19T23:59:59.000Z

2

ANALYTICAL METHODS in CHEMICAL ECOLOGY  

E-Print Network [OSTI]

ANALYTICAL METHODS in CHEMICAL ECOLOGY a post graduate course (doktorandkurs) when: February 10 ­ 28, 2014 where: Chemical Ecology, Plant Protection Biology, Swedish University of Agriculture (SLU to modern analytical methods used in Chemical Ecological and Ecotoxicological research, such as: methods

3

RADON 131 7. ANALYTICAL METHODS  

E-Print Network [OSTI]

The purpose of this chapter is to describe the analytical methods that are available for detecting, measuring, and/or monitoring radon and its progeny. The intent is not to provide an exhaustive list of analytical methods. Rather, the intention is to identify well-established methods that are used as the standard methods of analysis. Many of the analytical methods used for environmental samples are the methods approved by federal agencies and organizations such as EPA and the National Institute for Occupational Safety and Health (NIOSH). Other methods presented in this chapter are those that are approved by groups such as the Association of Official Analytical Chemists (AOAC) and the American Public Health Association (APHA). Additionally, analytical methods are included that modify previously used methods to obtain lower detection limits and/or to improve accuracy and precision. 7.1 BIOLOGICAL MATERIALS Table 7-1 lists various methods used to detect radon progeny in biological samples. Since the half-life of radon is short, its measurement in biological samples, such as serum, urine, blood, etc., is not practical. Measurements of the longer lived radon progeny 210 Pb and 210 Po in biological samples may be used as an indication of radon exposure; however, ingestion of these isotopes from food and drinking water or direct exposure from other environmental media are considered the primary sources of exposure for these

unknown authors

4

Hydrogen Fuel Quality - Focus: Analytical Methods Development...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Fuel Quality - Focus: Analytical Methods Development & Hydrogen Fuel Quality Results Hydrogen Fuel Quality - Focus: Analytical Methods Development & Hydrogen Fuel Quality Results...

5

Analytical methods under emergency conditions  

SciTech Connect (OSTI)

This lecture discusses methods for the radiochemical determination of internal contamination of the body under emergency conditions, here defined as a situation in which results on internal radioactive contamination are needed quickly. The purpose of speed is to determine the necessity for medical treatment to increase the natural elimination rate. Analytical methods discussed include whole-body counting, organ counting, wound monitoring, and excreta analysis. 12 references. (ACR)

Sedlet, J.

1983-01-01T23:59:59.000Z

6

Method of identity analyte-binding peptides  

DOE Patents [OSTI]

A method for affinity chromatography or adsorption of a designated analyte utilizes a paralog as the affinity partner. The immobilized paralog can be used in purification or analysis of the analyte; the paralog can also be used as a substitute for antibody in an immunoassay. The paralog is identified by screening candidate peptide sequences of 4--20 amino acids for specific affinity to the analyte. 5 figs.

Kauvar, L.M.

1990-10-16T23:59:59.000Z

7

E-Print Network 3.0 - ammonia release method Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ammonia emissions... gaseous ammonia (NH3) which through chemical reaction in rainwater changes into ammonium ion (NH4... Elsevier Ltd. All rights reserved. Keywords:...

8

WSRC-waste and environmental analytical methods  

SciTech Connect (OSTI)

A list of 491 analytical procedures to directly support waste and environmental analytical work is attached. The list is available from the author as a lotus or excel spreadsheet file.

Spencer, W.A.

1991-05-22T23:59:59.000Z

9

System and method for determining an ammonia generation rate in a three-way catalyst  

DOE Patents [OSTI]

A system according to the principles of the present disclosure includes a rate determination module, a storage level determination module, and an air/fuel ratio control module. The rate determination module determines an ammonia generation rate in a three-way catalyst based on a reaction efficiency and a reactant level. The storage level determination module determines an ammonia storage level in a selective catalytic reduction (SCR) catalyst positioned downstream from the three-way catalyst based on the ammonia generation rate. The air/fuel ratio control module controls an air/fuel ratio of an engine based on the ammonia storage level.

Sun, Min; Perry, Kevin L; Kim, Chang H

2014-12-30T23:59:59.000Z

10

Neutron noise calculations using the Analytical Nodal Method and comparisons with analytical solutions  

E-Print Network [OSTI]

Neutron noise calculations using the Analytical Nodal Method and comparisons with analytical Available online 28 December 2010 Keywords: Neutron noise ANM Power reactor approximation 2-Group theory Diffusion theory a b s t r a c t In this study, the neutron noise, i.e. the stationary fluctuations

Demazière, Christophe

11

Analytical methods for VLSI module placement  

E-Print Network [OSTI]

in Figure 2.6. The conjugate gradient method is quite usefulIn general, the conjugate gradient method ?nds the minimumexactly. Variant of conjugate gradient methods di?er in how

Wang, Qinke

2006-01-01T23:59:59.000Z

12

Analytical homogenization method for periodic composite materials  

E-Print Network [OSTI]

We present an easy-to-implement technique for determining the effective properties of composite materials with periodic microstructures, as well as the field distributions in them. Our method is based on the transformation ...

Chen, Ying

13

Data Analytics Methods in Wind Turbine Design and Operations  

E-Print Network [OSTI]

This dissertation develops sophisticated data analytic methods to analyze structural loads on, and power generation of, wind turbines. Wind turbines, which convert the kinetic energy in wind into electrical power, are operated within stochastic...

Lee, Giwhyun

2013-05-22T23:59:59.000Z

14

Analytical techniques for instrument design -- Matrix methods  

SciTech Connect (OSTI)

The authors take the traditional Cooper-Nathans approach, as has been applied for many years for steady-state triple-axis spectrometers, and consider its generalization to other inelastic scattering spectrometers. This involves a number of simple manipulations of exponentials of quadratic forms. In particular, they discuss a toolbox of matrix manipulations that can be performed on the 6-dimensional Cooper-Nathans matrix. They show how these tools can be combined to solve a number of important problems, within the narrow-band limit and the gaussian approximation. They will argue that a generalized program that can handle multiple different spectrometers could (and should) be written in parallel to the Monte-Carlo packages that are becoming available. They also discuss the complementarity between detailed Monte-Carlo calculations and the approach presented here. In particular, Monte-Carlo methods traditionally simulate the real experiment as performed in practice, given a model scattering law, while the Cooper-Nathans method asks the inverse question: given that a neutron turns up in a particular spectrometer configuration (e.g. angle and time of flight), what is the probability distribution of possible scattering events at the sample? The Monte-Carlo approach could be applied in the same spirit to this question.

Robinson, R.A.

1997-12-31T23:59:59.000Z

15

Statistically qualified neuro-analytic failure detection method and system  

DOE Patents [OSTI]

An apparatus and method for monitoring a process involve development and application of a statistically qualified neuro-analytic (SQNA) model to accurately and reliably identify process change. The development of the SQNA model is accomplished in two stages: deterministic model adaption and stochastic model modification of the deterministic model adaptation. Deterministic model adaption involves formulating an analytic model of the process representing known process characteristics, augmenting the analytic model with a neural network that captures unknown process characteristics, and training the resulting neuro-analytic model by adjusting the neural network weights according to a unique scaled equation error minimization technique. Stochastic model modification involves qualifying any remaining uncertainty in the trained neuro-analytic model by formulating a likelihood function, given an error propagation equation, for computing the probability that the neuro-analytic model generates measured process output. Preferably, the developed SQNA model is validated using known sequential probability ratio tests and applied to the process as an on-line monitoring system. Illustrative of the method and apparatus, the method is applied to a peristaltic pump system.

Vilim, Richard B. (Aurora, IL); Garcia, Humberto E. (Idaho Falls, ID); Chen, Frederick W. (Naperville, IL)

2002-03-02T23:59:59.000Z

16

Analytical Methods for Measuring Mercury in Water, Sediment and Biota  

SciTech Connect (OSTI)

Mercury (Hg) exists in a large number of physical and chemical forms with a wide range of properties. Conversion between these different forms provides the basis for mercury's complex distribution pattern in local and global cycles and for its biological enrichment and effects. Since the 1960s, the growing awareness of environmental mercury pollution has stimulated the development of more accurate, precise and efficient methods of determining mercury and its compounds in a wide variety of matrices. During recent years new analytical techniques have become available that have contributed significantly to the understanding of mercury chemistry in natural systems. In particular, these include ultra sensitive and specific analytical equipment and contamination-free methodologies. These improvements allow for the determination of total mercury as well as major species of mercury to be made in water, sediments and soils, and biota. Analytical methods are selected depending on the nature of the sample, the concentration levels of mercury, and what species or fraction is to be quantified. The terms speciation and fractionation in analytical chemistry were addressed by the International Union for Pure and Applied Chemistry (IUPAC) which published guidelines (Templeton et al., 2000) or recommendations for the definition of speciation analysis. "Speciation analysis is the analytical activity of identifying and/or measuring the quantities of one or more individual chemical species in a sample. The chemical species are specific forms of an element defined as to isotopic composition, electronic or oxidation state, and/or complex or molecular structure. The speciation of an element is the distribution of an element amongst defined chemical species in a system. In case that it is not possible to determine the concentration of the different individual chemical species that sum up the total concentration of an element in a given matrix, meaning it is impossible to determine the speciation, it is a useful practice to do fractionation instead. Fractionation is the process of classification of an analyte or a group of analytes from a certain sample according to physical (e.g. size, solubility) or chemical (e.g. bonding, reactivity) properties."

Lasorsa, Brenda K.; Gill, Gary A.; Horvat, Milena

2012-06-07T23:59:59.000Z

17

E-Print Network 3.0 - analytical methods validation Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

continuous calibration verification for analytical instruments use of method blanks... procedures, and NOAA's Analytical Quality Assurance Project Plan (QAPP). Samples were sent...

18

E-Print Network 3.0 - analytical method validation Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

continuous calibration verification for analytical instruments use of method blanks... procedures, and NOAA's Analytical Quality Assurance Project Plan (QAPP). Samples were sent...

19

E-Print Network 3.0 - analytical methods flambagem Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

continuous calibration verification for analytical instruments use of method blanks... procedures, and NOAA's Analytical Quality Assurance Project Plan (QAPP). Samples were sent...

20

ANALYTICAL METHODS FOR DISCRIMINATING STARDUST IN AEROGEL CAPTURE MEDIA  

E-Print Network [OSTI]

Methods using X-ray fluorescence have been developed to identify cometary material captured in aerogel during the NASA Stardust mission to Comet 81P/Wild 2. These analytical methods are necessitated by the levels of trace contaminants present in the aerogel. The cometary material disaggregates during deceleration in the aerogel, so fluorescence mapping of the entire track (which can be several millimeters long) is necessary. Distinguishing those pixels which have cometary material and aerogel from those which have only cometary material can be very challenging. We have chosen a dual threshold method, with some pixels clearly having only aerogel (plus contaminants) and other pixels clearly having cometary and aerogel material. Between these two threshold levels is a set of pixels which cannot be easily ascribed to one or the other. By leaving these pixels out of the analysis, the estimate of cometary material is improved.

Sean Brennan; Hope A. Ishii; John P. Bradley; Katharina Luening; Piero Pianetta

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

E-Print Network 3.0 - analytical detection methods Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

materials, and data qualification reporting guidelines. Method detection limits... procedures, and NOAA's Analytical Quality Assurance Project Plan (QAPP). ... Source: NOAA...

22

A method for interpreting continental and analytic epistemology  

E-Print Network [OSTI]

of this thesis is to investigate the feasibility and profitability of communication between analytic and continental philosophy in epistemology. Wittgenstein's concept of language games will be used to frame the issue', continental and analytic philosophers play...

McCoy, Sarah Ruth

1999-01-01T23:59:59.000Z

23

NIOSH Manual of Analytical Methods (third edition). Fourth supplement  

SciTech Connect (OSTI)

The NIOSH Manual of Analytical Methods, 3rd edition, was updated for the following chemicals: allyl-glycidyl-ether, 2-aminopyridine, aspartame, bromine, chlorine, n-butylamine, n-butyl-glycidyl-ether, carbon-dioxide, carbon-monoxide, chlorinated-camphene, chloroacetaldehyde, p-chlorophenol, crotonaldehyde, 1,1-dimethylhydrazine, dinitro-o-cresol, ethyl-acetate, ethyl-formate, ethylenimine, sodium-fluoride, hydrogen-fluoride, cryolite, sodium-hexafluoroaluminate, formic-acid, hexachlorobutadiene, hydrogen-cyanide, hydrogen-sulfide, isopropyl-acetate, isopropyl-ether, isopropyl-glycidyl-ether, lead, lead-oxide, maleic-anhydride, methyl-acetate, methyl-acrylate, methyl-tert-butyl ether, methyl-cellosolve-acetate, methylcyclohexanol, 4,4'-methylenedianiline, monomethylaniline, monomethylhydrazine, nitric-oxide, p-nitroaniline, phenyl-ether, phenyl-ether-biphenyl mixture, phenyl-glycidyl-ether, phenylhydrazine, phosphine, ronnel, sulfuryl-fluoride, talc, tributyl-phosphate, 1,1,2-trichloro-1,2,2-trifluoroethane, trimellitic-anhydride, triorthocresyl-phosphate, triphenyl-phosphate, and vinyl-acetate.

Not Available

1990-08-15T23:59:59.000Z

24

Estimating Fuel Cycle Externalities: Analytical Methods and Issues, Report 2  

SciTech Connect (OSTI)

The activities that produce electric power typically range from extracting and transporting a fuel, to its conversion into electric power, and finally to the disposition of residual by-products. This chain of activities is called a fuel cycle. A fuel cycle has emissions and other effects that result in unintended consequences. When these consequences affect third parties (i.e., those other than the producers and consumers of the fuel-cycle activity) in a way that is not reflected in the price of electricity, they are termed ''hidden'' social costs or externalities. They are the economic value of environmental, health and any other impacts, that the price of electricity does not reflect. How do you estimate the externalities of fuel cycles? Our previous report describes a methodological framework for doing so--called the damage function approach. This approach consists of five steps: (1) characterize the most important fuel cycle activities and their discharges, where importance is based on the expected magnitude of their externalities, (2) estimate the changes in pollutant concentrations or other effects of those activities, by modeling the dispersion and transformation of each pollutant, (3) calculate the impacts on ecosystems, human health, and any other resources of value (such as man-made structures), (4) translate the estimates of impacts into economic terms to estimate damages and benefits, and (5) assess the extent to which these damages and benefits are externalities, not reflected in the price of electricity. Each step requires a different set of equations, models and analysis. Analysts generally believe this to be the best approach for estimating externalities, but it has hardly been used! The reason is that it requires considerable analysis and calculation, and to this point in time, the necessary equations and models have not been assembled. Equally important, the process of identifying and estimating externalities leads to a number of complex issues that also have not been fully addressed. This document contains two types of papers that seek to fill part of this void. Some of the papers describe analytical methods that can be applied to one of the five steps of the damage function approach. The other papers discuss some of the complex issues that arise in trying to estimate externalities. This report, the second in a series of eight reports, is part of a joint study by the U.S. Department of Energy (DOE) and the Commission of the European Communities (EC)* on the externalities of fuel cycles. Most of the papers in this report were originally written as working papers during the initial phases of this study. The papers provide descriptions of the (non-radiological) atmospheric dispersion modeling that the study uses; reviews much of the relevant literature on ecological and health effects, and on the economic valuation of those impacts; contains several papers on some of the more complex and contentious issues in estimating externalities; and describes a method for depicting the quality of scientific information that a study uses. The analytical methods and issues that this report discusses generally pertain to more than one of the fuel cycles, though not necessarily to all of them. The report is divided into six parts, each one focusing on a different subject area.

Barnthouse, L.W.; Cada, G.F.; Cheng, M.-D.; Easterly, C.E.; Kroodsma, R.L.; Lee, R.; Shriner, D.S.; Tolbert, V.R.; Turner, R.S.

1994-07-01T23:59:59.000Z

25

Advancing Analytical Methods for Characterization of Anionic Carbohydrate Biopolymers  

E-Print Network [OSTI]

here a heparin disaccharide), IPR and C18 stationary phase;of a C18 column with the IPR which separates analytes via anseparation of tinzaparin where IPR used in A) TrBA, B) DBA,

Langeslay, Derek Joseph

2013-01-01T23:59:59.000Z

26

analytical modeling method: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

2006-11-21 396 Coupled thermodynamic-dynamic semi-analytical model of Free Piston Stirling engines CERN Preprints Summary: The study of free piston Stirling engine (FPSE)...

27

E-Print Network 3.0 - analytical chemistry methods Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Powered by Explorit Topic List Advanced Search Sample search results for: analytical chemistry methods Page: << < 1 2 3 4 5 > >> 1 Department of Chemistry Three Year Projection...

28

Hanford environmental analytical methods: Methods as of March 1990. Volume 3, Appendix A2-I  

SciTech Connect (OSTI)

This paper from the analytical laboratories at Hanford describes the method used to measure pH of single-shell tank core samples. Sludge or solid samples are mixed with deionized water. The pH electrode used combines both a sensor and reference electrode in one unit. The meter amplifies the input signal from the electrode and displays the pH visually.

Goheen, S.C.; McCulloch, M.; Daniel, J.L.

1993-05-01T23:59:59.000Z

29

Laser: a Tool for Optimization and Enhancement of Analytical Methods  

SciTech Connect (OSTI)

In this work, we use lasers to enhance possibilities of laser desorption methods and to optimize coating procedure for capillary electrophoresis (CE). We use several different instrumental arrangements to characterize matrix-assisted laser desorption (MALD) at atmospheric pressure and in vacuum. In imaging mode, 488-nm argon-ion laser beam is deflected by two acousto-optic deflectors to scan plumes desorbed at atmospheric pressure via absorption. All absorbing species, including neutral molecules, are monitored. Interesting features, e.g. differences between the initial plume and subsequent plumes desorbed from the same spot, or the formation of two plumes from one laser shot are observed. Total plume absorbance can be correlated with the acoustic signal generated by the desorption event. A model equation for the plume velocity as a function of time is proposed. Alternatively, the use of a static laser beam for observation enables reliable determination of plume velocities even when they are very high. Static scattering detection reveals negative influence of particle spallation on MS signal. Ion formation during MALD was monitored using 193-nm light to photodissociate a portion of insulin ion plume. These results define the optimal conditions for desorbing analytes from matrices, as opposed to achieving a compromise between efficient desorption and efficient ionization as is practiced in mass spectrometry. In CE experiment, we examined changes in a poly(ethylene oxide) (PEO) coating by continuously monitoring the electroosmotic flow (EOF) in a fused-silica capillary during electrophoresis. An imaging CCD camera was used to follow the motion of a fluorescent neutral marker zone along the length of the capillary excited by 488-nm Ar-ion laser. The PEO coating was shown to reduce the velocity of EOF by more than an order of magnitude compared to a bare capillary at pH 7.0. The coating protocol was important, especially at an intermediate pH of 7.7. The increase of pH in the cathodic (detection-end) buffer reservoir beyond pH {approx}8.0, e.g. as a result of electrolysis, had a large impact on the stability of the coating. This phenomenon may be used for the efficient and reliable fast regeneration of the column surface.

Preisler, Jan

1997-01-01T23:59:59.000Z

30

Method for Operating a Sensor to Differentiate Between Analytes in a Sample  

DOE Patents [OSTI]

Disclosed is a method for operating a sensor to differentiate between first and second analytes in a sample. The method comprises the steps of determining a input profile for the sensor which will enhance the difference in the output profiles of the sensor as between the first analyte and the second analyte; determining a first analyte output profile as observed when the input profile is applied to the sensor; determining a second analyte output profile as observed when the temperature profile is applied to the sensor; introducing the sensor to the sample while applying the temperature profile to the sensor, thereby obtaining a sample output profile; and evaluating the sample output profile as against the first and second analyte output profiles to thereby determine which of the analytes is present in the sample.

Kunt, Tekin; Cavicchi, Richard E.; Semancik, Stephen; McAvoy, Thomas J.

1998-07-28T23:59:59.000Z

31

Ammonia Process by Pressure Swing Adsorption  

SciTech Connect (OSTI)

The overall objective of the project is to design, develop and demonstrate a technically feasible and commercially viable system to produce ammonia along with recovery of the products by adsorption separation methods and significantly decrease the energy requirement in ammonia production. This is achieved through a significantly more efficient ammonia psa recovery system. The new ammonia recovery system receives the reactor effluents and achieves complete ammonia recovery, (which completely eliminates the energy intensive refrigeration and condensation system currently used in ammonia production). It also recovers the unused reactants and recycles them back to the reactor, free of potential reactor contaminants, and without the need for re-compression and re-heat of recycle stream thereby further saving more energy. The result is a significantly lower energy consumption, along with capital cost savings.

Dr Felix Jegede

2010-12-27T23:59:59.000Z

32

Manual of analytical methods for the Industrial Hygiene Chemistry Laboratory  

SciTech Connect (OSTI)

This Manual is compiled from techniques used in the Industrial Hygiene Chemistry Laboratory of Sandia National Laboratories in Albuquerque, New Mexico. The procedures are similar to those used in other laboratories devoted to industrial hygiene practices. Some of the methods are standard; some, modified to suit our needs; and still others, developed at Sandia. The authors have attempted to present all methods in a simple and concise manner but in sufficient detail to make them readily usable. It is not to be inferred that these methods are universal for any type of sample, but they have been found very reliable for the types of samples mentioned.

Greulich, K.A.; Gray, C.E. (comp.)

1991-08-01T23:59:59.000Z

33

A comparison of the point kinetics equations with the QUANDRY analytic nodal diffusion method  

E-Print Network [OSTI]

The point kinetics equations were incorporated into QUANDRY, a nuclear reactor analysis computer program which uses the analytic nodal method to solve the neutron diffusion equation. Both the point kinetics equations, solved using the IMSL MATH...

Velasquez, Arthur

1993-01-01T23:59:59.000Z

34

Production Systems and Processing Effect on Phytochemicals in Citrus Fruits and Their Analytical and Isolation Methods  

E-Print Network [OSTI]

of these phytochemicals this dissertation describes the development of rapid analytical and isolation methods, and the effect of production systems and processing techniques on the levels of phytochemicals in citrus fruits. In the first study, a simultaneous high...

Uckoo, Ram 1980-

2012-12-13T23:59:59.000Z

35

External Quality Assurance Services (EQAS) Ethanol/Ammonia Program  

E-Print Network [OSTI]

External Quality Assurance Services (EQAS) Ethanol/Ammonia Program BC35 12 x 3 mL 2 Analytes QC35 12 x 3 mL Specimen Only ENGLISH INTENDED USE Bio-Rad EQAS Ethanol/Ammonia Program is designed

Rodriguez, Carlos

36

Comparison of analytical methods for percent phosphorus determination in electroless nickel plate  

SciTech Connect (OSTI)

This report presents the results of the evaluation of five analytical methods for percent phosphorus determination and makes recommendations for the use of common methods to provide accurate and precise results in the field. The analytical methods are: (1) ASTM-E39 gravimetric method; (2) development colorimetric method; (3) independent colorimetric method; (4) UCC-ND alkalimetric method; (5) UCC-ND inductively coupled plasma method. Analysis of the data indicates the concentration of phosphorus in the electroless nickel plate sample to be approximately 12.1%. All of the methods evaluated demonstrated the capability of determining percent phosphorus accurately through the accumulation of a large number of readings. The primary difference among the methods is the precision capabilites of individual tests. 3 figures, 6 tables.

Owens, W.W.; Sullivan, H.H.

1982-08-13T23:59:59.000Z

37

Analytical Chemistry Laboratory (ACL) procedure compendium. Volume 4, Organic methods  

SciTech Connect (OSTI)

This interim notice covers the following: extractable organic halides in solids, total organic halides, analysis by gas chromatography/Fourier transform-infrared spectroscopy, hexadecane extracts for volatile organic compounds, GC/MS analysis of VOCs, GC/MS analysis of methanol extracts of cryogenic vapor samples, screening of semivolatile organic extracts, GPC cleanup for semivolatiles, sample preparation for GC/MS for semi-VOCs, analysis for pesticides/PCBs by GC with electron capture detection, sample preparation for pesticides/PCBs in water and soil sediment, report preparation, Florisil column cleanup for pesticide/PCBs, silica gel and acid-base partition cleanup of samples for semi-VOCs, concentrate acid wash cleanup, carbon determination in solids using Coulometrics` CO{sub 2} coulometer, determination of total carbon/total organic carbon/total inorganic carbon in radioactive liquids/soils/sludges by hot persulfate method, analysis of solids for carbonates using Coulometrics` Model 5011 coulometer, and soxhlet extraction.

Not Available

1993-08-01T23:59:59.000Z

38

Sampling, preservation, and analytical methods research plan - liquid redox sulfur recovery technologies: Stretford process. Topical report  

SciTech Connect (OSTI)

GRI has developed a sampling, preservation, and analytical (SPandA) methods research plan for developing and validating analytical methodologies for liquid redox sulfur recovery processes (e.g., Stretford process). The document describes the technical approach which will be used to direct research activities to develop SPandA methodologies to analyze gaseous, aqueous, and solid process streams from the Stretford sulfur recovery process. The primary emphasis is on developing and validating methodologies for analyzing vanadium (IV) and vanadium (V), anthraquinone disulphonic acids (ADA), polysulfide-sulfur, sulfide-sulfur, thiosulfate, sulfate, thiocyanate, total soluble sulfur, alkalinity, pH, total dissolved solids, total suspended solids, and dissolved oxygen in aqueous process streams. The document includes descriptions of the process streams and chemical species, selection of candidate analytical methods, and technical approach for methods development and validation.

Trofe, T.W.

1986-11-01T23:59:59.000Z

39

Analytical and numerical methods for processing Hopkinson Bar Loaded Bending test on concrete: a comparative study  

E-Print Network [OSTI]

Analytical and numerical methods for processing Hopkinson Bar Loaded Bending test on concrete on dynamic characteristics of concrete. Various techniques have been used to test concretes at high strain for concrete structures subjected to dynamic loading such as explosions or im- pacts require information

Boyer, Edmond

40

A novel analytical operator method to solve linear ordinary differential equations with variable coefficients  

E-Print Network [OSTI]

A new analytical operator method is discussed which solves linear ordinary differential equations with regular singularities. Solutions are obtained in analytic series form and also in Mellin-Barnes-type contour integral form. Exact series solution is obtained without having to calculate series coefficients by recurrence relation.Both homogeneous and inhomogeneous equations are solved identically without having to calculate the Green's function explicitly in the case of inhomogeneous equation.Closed-form solutions are obtained for all the special functions appearing in mathematical physics. For a second-order equation both the independent solutions are obtained without invoking Wronskians, even when the indices differ by an integer.

Wrick Sengupta

2009-02-05T23:59:59.000Z

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

The use of a semi-analytical method for matching aquifer influence functions  

E-Print Network [OSTI]

of water-drive gas reservoirs. The method is suitable for hand calculation. Fetkovich ", in 1971, presented an approach that utilizes the "stabilized", or pseudosteady-state aquifer productivity index and an aquifer material balance to represent...THE USE OF A SEMI-ANALYTICAL METHOD FOR MATCHING AQUIFER INFLUENCE FUNCTIONS A Thesis by SHENG DING Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER...

Ding, Sheng

1990-01-01T23:59:59.000Z

42

Comparison of analytical methods for percent phosphorous determination in electroless nickel plate. [UCC-ND alkalimetric method; UCC-ND Inductively Coupled Plasma (ICP) method; ASTM-E39 gravimetric method; development colorimetric method; independent colorimetric method  

SciTech Connect (OSTI)

Electroless nicke-plate characteristics are substantially influenced by percent phosphorous concentrations. Available ASTM analytical methods are designed for phosphorous concentrations of less than one percent compared to the 4.0 to 20.0% concentrations common in electroless nickel plate. A variety of analytical adaptations are applied through the industry resulting in poor data continuity. This paper presents a statistical comparison of five analytical methods and recommends accurate and precise procedures for use in percent phosphorous determinations in electroless nickel plate. 2 figures, 1 table.

Owens, W.W.; Sullivan, H.H.

1982-01-01T23:59:59.000Z

43

Reactor for removing ammonia  

DOE Patents [OSTI]

Disclosed is a device for removing trace amounts of ammonia from a stream of gas, particularly hydrogen gas, prepared by a reformation apparatus. The apparatus is used to prevent PEM "poisoning" in a fuel cell receiving the incoming hydrogen stream.

Luo, Weifang (Livermore, CA); Stewart, Kenneth D. (Valley Springs, CA)

2009-11-17T23:59:59.000Z

44

Selection of analytical methods for mixed waste analysis at the Hanford Site  

SciTech Connect (OSTI)

This document describes the process that the US Department of Energy (DOE), Richland Operations Office (RL) and contractor laboratories use to select appropriate or develop new or modified analytical methods. These methods are needed to provide reliable mixed waste characterization data that meet project-specific quality assurance (QA) requirements while also meeting health and safety standards for handling radioactive materials. This process will provide the technical basis for DOE`s analysis of mixed waste and support requests for regulatory approval of these new methods when they are used to satisfy the regulatory requirements of the Hanford Federal Facility Agreement and Consent Order (Tri-party Agreement) (Ecology et al. 1992).

Morant, P.M.

1994-09-01T23:59:59.000Z

45

Analytical Chemistry Laboratory (ACL) procedure compendium. Volume 3, Inorganic instrumental methods  

SciTech Connect (OSTI)

The methods cover: C in solutions, F (electrode), elements by atomic emission spectrometry, inorganic anions by ion chromatography, Hg in water/solids/sludges, As, Se, Bi, Pb, data calculations for SST (single shell tank?) samples, Sb, Tl, Ag, Pu, O/M ratio, ignition weight loss, pH value, ammonia (N), Cr(VI), alkalinity, U, C sepn. from soil/sediment/sludge, Pu purif., total N, water, C and S, surface Cl/F, leachable Cl/F, outgassing of Ge detector dewars, gas mixing, gas isotopic analysis, XRF of metals/alloys/compounds, H in Zircaloy, H/O in metals, inpurity extraction, reduced/total Fe in glass, free acid in U/Pu solns, density of solns, Kr/Xe isotopes in FFTF cover gas, H by combustion, MS of Li and Cs isotopes, MS of lanthanide isotopes, GC operation, total Na on filters, XRF spectroscopy QC, multichannel analyzer operation, total cyanide in water/solid/sludge, free cyanide in water/leachate, hydrazine conc., ICP-MS, {sup 99}Tc, U conc./isotopes, microprobe analysis of solids, gas analysis, total cyanide, H/N{sub 2}O in air, and pH in soil.

Not Available

1993-08-01T23:59:59.000Z

46

Ammonia synthesis gas purification  

SciTech Connect (OSTI)

This patent describes the purification of a reformed gas mixture following water gas shift conversion to produce a purified ammonia synthesis gas stream. The improved processing sequence consisting essentially of: (A) Selectively catalytically oxidizing the residual carbon monoxide content of the gas mixture to carbon dioxide so as to reduce the carbon monoxide content of the gas mixture to less than about 20 ppm, the selective catalytic oxidation being carried out with an excess of air, with the excess oxygen being catalytically reacted with a small amount of hydrogen so that the residual oxygen level is reduced to less than about 3 ppm; (B) removing the bulk of the carbon dioxide content of the gas mixture by liquid absorption; (C) Removing residual amounts of carbon monoxide, carbon dioxide and water by selective adsorption on the fixed beds of a thermal swing adsorption system, a dry, purified ammonia ammonia synthesis gas stream containing less than a total of 10 ppm of carbon monoxide and carbon dioxide being recovered from the thermal swing adsorption system; (D) Passing the resulting dry, purified ammonia synthesis gas stream having a low content of methane to an ammonia production operation without intermediate passage of the ammonia synthesis gas stream to a methanation unit or to a cryogenic unit for removal of carbon monoxide and carbon dioxide therefrom; whereby the efficiency of the overall purification operation and the effective utilization of hydrogen are enhanced.

Fuderer, A.

1986-02-25T23:59:59.000Z

47

Corrosion inhibitor for aqueous ammonia absorption system  

DOE Patents [OSTI]

A method of inhibiting corrosion and the formation of hydrogen and thus improving absorption in an ammonia/water absorption refrigeration, air conditioning or heat pump system by maintaining the hydroxyl ion concentration of the aqueous ammonia working fluid within a selected range under anaerobic conditions at temperatures up to 425.degree. F. This hydroxyl ion concentration is maintained by introducing to the aqueous ammonia working fluid an inhibitor in an amount effective to produce a hydroxyl ion concentration corresponding to a normality of the inhibitor relative to the water content ranging from about 0.015 N to about 0.2 N at 25.degree. C. Also, working fluids for inhibiting the corrosion of carbon steel and resulting hydrogen formation and improving absorption in an ammonia/water absorption system under anaerobic conditions at up to 425.degree. F. The working fluids may be aqueous solutions of ammonia and a strong base or aqueous solutions of ammonia, a strong base, and a specified buffer.

Phillips, Benjamin A. (Benton Harbor, MI); Whitlow, Eugene P. (St. Joseph, MI)

1998-09-22T23:59:59.000Z

48

Corrosion inhibitor for aqueous ammonia absorption system  

DOE Patents [OSTI]

A method is described for inhibiting corrosion and the formation of hydrogen and thus improving absorption in an ammonia/water absorption refrigeration, air conditioning or heat pump system by maintaining the hydroxyl ion concentration of the aqueous ammonia working fluid within a selected range under anaerobic conditions at temperatures up to 425 F. This hydroxyl ion concentration is maintained by introducing to the aqueous ammonia working fluid an inhibitor in an amount effective to produce a hydroxyl ion concentration corresponding to a normality of the inhibitor relative to the water content ranging from about 0.015 N to about 0.2 N at 25 C. Also, working fluids for inhibiting the corrosion of carbon steel and resulting hydrogen formation and improving absorption in an ammonia/water absorption system under anaerobic conditions at up to 425 F. The working fluids may be aqueous solutions of ammonia and a strong base or aqueous solutions of ammonia, a strong base, and a specified buffer. 5 figs.

Phillips, B.A.; Whitlow, E.P.

1998-09-22T23:59:59.000Z

49

Analytic solution of nonlinear fractional Burgers-type equation by invariant subspace method  

E-Print Network [OSTI]

In this paper we study the analytic solutions of Burgers-type nonlinear fractional equations by means of the Invariant Subspace Method. We first study a class of nonlinear equations directly related to the time-fractional Burgers equation. Some generalizations linked to the forced time-fractional Burgers equations and variable-coefficient diffusion are also considered. Finally we study a Burgers-type equation involving both space and time-fractional derivatives.

P. Artale Harris; R. Garra

2013-06-08T23:59:59.000Z

50

The validity of analytical methods for predicting self burial of offshore pipelines  

E-Print Network [OSTI]

penetration of ~. D H drostatic ressure test hase, - Prior to placing a pipeline into service, it is necessary to perform a pressure test to insure that the structural integrity of the pipe was maintained during construction and to check for leaks...THE VALIDITY OF ANALYTICAL METHODS FOR PREDICTING SELF BURIAL OF OFFSHORE PIPELINES A Thesis by THOMAS KENWOOD HAMILTON Submitted to the Graduate College of Texas AEM University in partial fulfillment of the requirement for the degree...

Hamilton, Thomas Kenwood

2012-06-07T23:59:59.000Z

51

A two-dimensional, semi-analytic expansion method for nodal calculations  

SciTech Connect (OSTI)

Most modern nodal methods used today are based upon the transverse integration procedure in which the multi-dimensional flux shape is integrated over the transverse directions in order to produce a set of coupled one-dimensional flux shapes. The one-dimensional flux shapes are then solved either analytically or by representing the flux shape by a finite polynomial expansion. While these methods have been verified for most light-water reactor applications, they have been found to have difficulty predicting the large thermal flux gradients near the interfaces of highly-enriched MOX fuel assemblies. A new method is presented here in which the neutron flux is represented by a non-seperable, two-dimensional, semi-analytic flux expansion. The main features of this method are (1) the leakage terms from the node are modeled explicitly and therefore, the transverse integration procedure is not used, (2) the corner point flux values for each node are directly edited from the solution method, and a corner-point interpolation is not needed in the flux reconstruction, (3) the thermal flux expansion contains hyperbolic terms representing analytic solutions to the thermal flux diffusion equation, and (4) the thermal flux expansion contains a thermal to fast flux ratio term which reduces the number of polynomial expansion functions needed to represent the thermal flux. This new nodal method has been incorporated into the computer code COLOR2G and has been used to solve a two-dimensional, two-group colorset problem containing uranium and highly-enriched MOX fuel assemblies. The results from this calculation are compared to the results found using a code based on the traditional transverse integration procedure.

Palmtag, S.P. [Univ. of Missouri, Rolla, MO (United States). Dept. of Nuclear Engineering

1995-08-01T23:59:59.000Z

52

On certain analytical methods in finding integrable systems and their interconnections  

E-Print Network [OSTI]

In this paper, to begin with, we review six different analytical methods which are widely used to derive symmetries, integrating factors, multipliers, Darboux polynomials and integrals of second order nonlinear ordinary differential equations. We illustrate the algorithm behind each method by considering a nonlinear oscillator equation as an example. In the second part of this paper, we examine the interconnections between these methods. We establish a road map between extended Prelle-Singer procedure with all other methods cited above and thereby demonstrate the interplay between Lie point symmetries, $\\lambda$-symmetries, adjoint symmetries, null forms, integrating factors, Darboux polynomials, and Jacobi multipliers of second order integrable ODEs. The interconnections are illustrated with the same example finally.

R. Mohanasubha; V. K. Chandrasekar; M. Senthilvelan; M. Lakshmanan

2015-02-13T23:59:59.000Z

53

Energy Efficient Operation of Ammonia Refrigeration Systems  

SciTech Connect (OSTI)

Ammonia refrigeration systems typically offer many energy efficiency opportunities because of their size and complexity. This paper develops a model for simulating single-stage ammonia refrigeration systems, describes common energy saving opportunities, and uses the model to quantify those opportunities. The simulation model uses data that are typically available during site visits to ammonia refrigeration plants and can be calibrated to actual consumption and performance data if available. Annual electricity consumption for a base-case ammonia refrigeration system is simulated. The model is then used to quantify energy savings for six specific energy efficiency opportunities; reduce refrigeration load, increase suction pressure, employ dual suction, decrease minimum head pressure set-point, increase evaporative condenser capacity, and reclaim heat. Methods and considerations for achieving each saving opportunity are discussed. The model captures synergistic effects that result when more than one component or parameter is changed. This methodology represents an effective method to model and quantify common energy saving opportunities in ammonia refrigeration systems. The results indicate the range of savings that might be expected from common energy efficiency opportunities.

Mohammed, Abdul Qayyum [University of Dayton, Ohio] [University of Dayton, Ohio; Wenning, Thomas J [ORNL] [ORNL; Sever, Franc [University of Dayton, Ohio] [University of Dayton, Ohio; Kissock, Professor Kelly [University of Dayton, Ohio] [University of Dayton, Ohio

2013-01-01T23:59:59.000Z

54

An analytical inversion method for determining regional and global emissions of greenhouse gases: Sensitivity studies and application to halocarbons  

E-Print Network [OSTI]

A new analytical inversion method has been developed to determine the regional and global emissions of long-lived atmospheric trace gases. It exploits in situ measurement data from three global networks and builds on ...

Stohl, A.

55

Evaluation of analytical methods to interpret ground deformations due to soft ground tunneling  

E-Print Network [OSTI]

An in depth study was undertaken to evaluate the effectiveness of analytical solutions in describing ground movements induced by soft ground tunneling. The analytical solutions that were examined consider both isotropic ...

Zymnis, Despina M

2009-01-01T23:59:59.000Z

56

E-Print Network 3.0 - analytical methods ii Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Calculus with Analytic Geometry I 4 MAC x312 Calculus with Analytic Geometry II 4 PHY x048 General Physics... CHM 2211+L Organic Chemistry II 5 MAC 1105 College Algebra 3...

57

Pulsed voltage electrospray ion source and method for preventing analyte electrolysis  

DOE Patents [OSTI]

An electrospray ion source and method of operation includes the application of pulsed voltage to prevent electrolysis of analytes with a low electrochemical potential. The electrospray ion source can include an emitter, a counter electrode, and a power supply. The emitter can include a liquid conduit, a primary working electrode having a liquid contacting surface, and a spray tip, where the liquid conduit and the working electrode are in liquid communication. The counter electrode can be proximate to, but separated from, the spray tip. The power system can supply voltage to the working electrode in the form of a pulse wave, where the pulse wave oscillates between at least an energized voltage and a relaxation voltage. The relaxation duration of the relaxation voltage can range from 1 millisecond to 35 milliseconds. The pulse duration of the energized voltage can be less than 1 millisecond and the frequency of the pulse wave can range from 30 to 800 Hz.

Kertesz, Vilmos (Knoxville, TN); Van Berkel, Gary (Clinton, TN)

2011-12-27T23:59:59.000Z

58

Advanced organic analysis and analytical methods development: FY 1995 progress report. Waste Tank Organic Safety Program  

SciTech Connect (OSTI)

This report describes the work performed during FY 1995 by Pacific Northwest Laboratory in developing and optimizing analysis techniques for identifying organics present in Hanford waste tanks. The main focus was to provide a means for rapidly obtaining the most useful information concerning the organics present in tank waste, with minimal sample handling and with minimal waste generation. One major focus has been to optimize analytical methods for organic speciation. Select methods, such as atmospheric pressure chemical ionization mass spectrometry and matrix-assisted laser desorption/ionization mass spectrometry, were developed to increase the speciation capabilities, while minimizing sample handling. A capillary electrophoresis method was developed to improve separation capabilities while minimizing additional waste generation. In addition, considerable emphasis has been placed on developing a rapid screening tool, based on Raman and infrared spectroscopy, for determining organic functional group content when complete organic speciation is not required. This capability would allow for a cost-effective means to screen the waste tanks to identify tanks that require more specialized and complete organic speciation to determine tank safety.

Wahl, K.L.; Campbell, J.A.; Clauss, S.A. [and others

1995-09-01T23:59:59.000Z

59

Equipment configurations for use of ammonia in supermarket applications. Report for September 1992-May 1994  

SciTech Connect (OSTI)

The paper discusses equipment configurations for the use of ammonia in supermarket refrigeration applications. This paper identifies the optimal design for ammonia-secondary fluid systems and compares their performance to that of R22 systems. Three methods of staging the compression were compared for both refrigerants. Six secondary fluids were evaluated for use with ammonia in a supermarket system. Overall system performance of the ammonia-secondary fluid refrigeration system is governed by a large set of design parameters. The influence of these parameters on overall system performance was studied systematically. From this parametric study, design rules were developed, leading to optimum ammonia-secondary fluid systems.

McDowell, T.P.; Mitchell, J.W.; Klein, S.A.

1996-12-31T23:59:59.000Z

60

Ion mobility spectrometer, spectrometer analyte detection and identification verification system, and method  

DOE Patents [OSTI]

Methods and apparatus for ion mobility spectrometry and analyte detection and identification verification system are disclosed. The apparatus is configured to be used in an ion mobility spectrometer and includes a plurality of reactant reservoirs configured to contain a plurality of reactants which can be reacted with the sample to form adducts having varying ion mobilities. A carrier fluid, such as air or nitrogen, is used to carry the sample into the spectrometer. The plurality of reactants are configured to be selectively added to the carrier stream by use inlet and outlet manifolds in communication with the reagent reservoirs, the reservoirs being selectively isolatable by valves. The invention further includes a spectrometer having the reagent system described. In the method, a first reactant is used with the sample. Following a positive result, a second reactant is used to determine whether a predicted response occurs. The occurrence of the second predicted response tends to verify the existence of a component of interest within the sample. A third reactant can also be used to provide further verification of the existence of a component of interest. A library can be established of known responses of compounds of interest with various reactants and the results of a specific multi-reactant survey of a sample can be compared against the library to determine whether a component detected in the sample is likely to be a specific component of interest.

Atkinson, David A. (Idaho Falls, ID)

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

E-Print Network 3.0 - analytical chromatography methods Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sciences 4 JAMES E. GIRARD PhD CURRICULUM VITAE Summary: Chromatography", with John R. Heuser, Analytical Chemistry, 57, 2847-2850, (1985). "Development of Selective......

62

E-Print Network 3.0 - analytical method development Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Page: << < 1 2 3 4 5 > >> 1 Symposium, Hans-Johann Glock, What is Analytic Philosophy? Christopher Pincock, Department of Philosophy, University of Missouri...

63

E-Print Network 3.0 - analytical methods development Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Page: << < 1 2 3 4 5 > >> 1 Symposium, Hans-Johann Glock, What is Analytic Philosophy? Christopher Pincock, Department of Philosophy, University of Missouri...

64

E-Print Network 3.0 - analytical method based Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

based Page: << < 1 2 3 4 5 > >> 1 Symposium, Hans-Johann Glock, What is Analytic Philosophy? Christopher Pincock, Department of Philosophy, University of Missouri...

65

E-Print Network 3.0 - analytic method tested Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Environmental Thermal Systems Research Group at Oklahoma State University (www.hvac.okstate.edu) Summary: .D. Spitler, S.J. Rees. 2002. An Analytical Verification Test...

66

Process for synthesis of ammonia borane for bulk hydrogen storage  

DOE Patents [OSTI]

The present invention discloses new methods for synthesizing ammonia borane (NH.sub.3BH.sub.3, or AB). Ammonium borohydride (NH.sub.4BH.sub.4) is formed from the reaction of borohydride salts and ammonium salts in liquid ammonia. Ammonium borohydride is decomposed in an ether-based solvent that yields AB at a near quantitative yield. The AB product shows promise as a chemical hydrogen storage material for fuel cell powered applications.

Autrey, S Thomas [West Richland, WA; Heldebrant, David J [Richland, WA; Linehan, John C [Richland, WA; Karkamkar, Abhijeet J [Richland, WA; Zheng, Feng [Richland, WA

2011-03-01T23:59:59.000Z

67

amc technical briefamc technical brief Analytical Methods Committee No. 4. Jan 2001 Royal Society of Chemistry 2001  

E-Print Network [OSTI]

amc technical briefamc technical brief Analytical Methods Committee No. 4. Jan 2001 © Royal Society consistent than the histogram would therefore be welcome. Computer power can now fulfil this requirement, proficiency test results from the Food Analysis Performance Assessment Scheme (FAPASTM).3 The plots were

DeWitt, Thomas J.

68

Characterization of Geosynthetic Clay Liner Bentonite using Micro-analytical Methods  

SciTech Connect (OSTI)

In barrier design, familiarity of the structure and composition of the soil material at the micron scale is necessary for delineating the retention mechanisms of introduced metals, such as the formation of new mineral phases. In this study, the mineralogical and chemical makeup of the bentonite from a geosynthetic clay liner (GCL) was extensively characterized using a combination of conventional benchtop X-ray diffraction (XRD) and micro X-ray diffraction ({mu}XRD) with synchrotron-generated micro X-ray fluorescence ({mu}XRF) elemental mapping and {mu}XRD (S-{mu}XRD). These methods allow for the non-destructive, in situ investigation of a sample, with {micro}m spatial resolution. Synchrotron-based hard X-ray microprobes are specifically advantageous to the study of trace metals due to higher spatial resolution (<10 {micro}m) and higher analytical sensitivity (femtogram detection) than is possible using normal laboratory-based instruments. Minerals comprising less than 5% of the total bentonite sample such as gypsum, goethite and pyrite were identified that were not accessible by other conventional methods for the same GCL bentonite. Two dimensional General Area Diffraction Detector System (GADDS) images proved to be particularly advantageous in differentiating between the microcrystalline clay, which appeared as homogeneous Debye rings, and the 'spotty' or 'grainy' appearance of primary, more-coarsely-crystalline, accessory minerals. For S-{mu}XRD, the tunability of the synchrotron X-rays allowed for efficient distinction of both clay minerals at low scattering angles and in identifying varying Fe oxide minerals at higher angles. GCL samples permeated with metal-bearing mining solutions were also examined in order to consider how mechanisms of metal attenuation may be identified using the same techniques. In addition to the cation exchange capacity from the montmorillonite clay, tests showed how minerals comprising only 1-2% of the bentonite such as goethite could potentially play a significant role in sequestering a range of metals, specifically Ni, Zn and Cu.

Lange, K.; Rowe, R; Jamieson, H; Flemming, R; Lanzirotti, A

2010-01-01T23:59:59.000Z

69

INVESTIGATION OF THE TOTAL ORGANIC HALOGEN ANALYTICAL METHOD AT THE WASTE SAMPLING CHARACTERIZATION FACILITY (WSCF)  

SciTech Connect (OSTI)

Total organic halogen (TOX) is used as a parameter to screen groundwater samples at the Hanford Site. Trending is done for each groundwater well, and changes in TOX and other screening parameters can lead to costly changes in the monitoring protocol. The Waste Sampling and Characterization Facility (WSCF) analyzes groundwater samples for TOX using the United States Environmental Protection Agency (EPA) SW-846 method 9020B (EPA 1996a). Samples from the Soil and Groundwater Remediation Project (S&GRP) are submitted to the WSCF for analysis without information regarding the source of the sample; each sample is in essence a 'blind' sample to the laboratory. Feedback from the S&GRP indicated that some of the WSCF-generated TOX data from groundwater wells had a number of outlier values based on the historical trends (Anastos 2008a). Additionally, analysts at WSCF observed inconsistent TOX results among field sample replicates. Therefore, the WSCF lab performed an investigation of the TOX analysis to determine the cause of the outlier data points. Two causes were found that contributed to generating out-of-trend TOX data: (1) The presence of inorganic chloride in the groundwater samples: at inorganic chloride concentrations greater than about 10 parts per million (ppm), apparent TOX values increase with increasing chloride concentration. A parallel observation is the increase in apparent breakthrough of TOX from the first to the second activated-carbon adsorption tubes with increasing inorganic chloride concentration. (2) During the sample preparation step, excessive purging of the adsorption tubes with oxygen pressurization gas after sample loading may cause channeling in the activated-carbon bed. This channeling leads to poor removal of inorganic chloride during the subsequent wash step with aqueous potassium nitrate. The presence of this residual inorganic chloride then produces erroneously high TOX values. Changes in sample preparation were studied to more effectively remove inorganic chloride from the activated carbon adsorption tubes. With the TOX sample preparation equipment and TOX analyzers at WSCF, the nitrate wash recommended by EPA SW-846 method 9020B was found to be inadequate to remove inorganic chloride interference. Increasing the nitrate wash concentration from 10 grams per liter (g/L) to 100 g/L potassium nitrate and increasing the nitrate wash volume from 3 milliliters (mL) to 10 mL effectively removed the inorganic chloride up to at least 100 ppm chloride in the sample matrix. Excessive purging of the adsorption tubes during sample preparation was eliminated. These changes in sample preparation have been incorporated in the analytical procedure. The results using the revised sample preparation procedure show better agreement of TOX values both for replicate analyses of single samples and for the analysis of replicate samples acquired from the same groundwater well. Furthermore, less apparent column breakthrough now occurs with the revised procedure. One additional modification made to sample preparation was to discontinue the treatment of groundwater samples with sodium bisulfite. Sodium bisulfite is used to remove inorganic chlorine from the sample; inorganic chlorine is not expected to be a constituent in these groundwater samples. Several other factors were also investigated as possible sources of anomalous TOX results: (1) Instrument instability: examination of the history of results for TOX laboratory control samples and initial calibration verification standards indicate good long-term precision for the method and instrument. Determination of a method detection limit of 2.3 ppb in a deionized water matrix indicates the method and instrumentation have good stability and repeatability. (2) Non-linear instrument response: the instrument is shown to have good linear response from zero to 200 parts per billion (ppb) TOX. This concentration range encompasses the majority of samples received at WSCF for TOX analysis. (3) Improper sample preservation: ion-chromatographic analysis of several samples wit

DOUGLAS JG; MEZNARICH HD, PHD; OLSEN JR; ROSS GA; STAUFFER M

2008-09-30T23:59:59.000Z

70

INVESTIGATION OF THE TOTAL ORGANIC HALOGEN ANALYTICAL METHOD AT THE WASTE SAMPLING AND CHARACTERIZATION FACILITY  

SciTech Connect (OSTI)

Total organic halogen (TOX) is used as a parameter to screen groundwater samples at the Hanford Site. Trending is done for each groundwater well, and changes in TOX and other screening parameters can lead to costly changes in the monitoring protocol. The Waste Sampling and Characterization Facility (WSCF) analyzes groundwater samples for TOX using the United States Environmental Protection Agency (EPA) SW-S46 method 9020B (EPA 1996a). Samples from the Soil and Groundwater Remediation Project (SGRP) are submitted to the WSCF for analysis without information regarding the source of the sample; each sample is in essence a ''blind'' sample to the laboratory. Feedback from the SGRP indicated that some of the WSCF-generated TOX data from groundwater wells had a number of outlier values based on the historical trends (Anastos 200Sa). Additionally, analysts at WSCF observed inconsistent TOX results among field sample replicates. Therefore, the WSCF lab performed an investigation of the TOX analysis to determine the cause of the outlier data points. Two causes were found that contributed to generating out-of-trend TOX data: (1) The presence of inorganic chloride in the groundwater samples: at inorganic chloride concentrations greater than about 10 parts per million (ppm), apparent TOX values increase with increasing chloride concentration. A parallel observation is the increase in apparent breakthrough of TOX from the first to the second activated-carbon adsorption tubes with increasing inorganic chloride concentration. (2) During the sample preparation step, excessive purging of the adsorption tubes with oxygen pressurization gas after sample loading may cause channeling in the activated carbon bed. This channeling leads to poor removal of inorganic chloride during the subsequent wash step with aqueous potassium nitrate. The presence of this residual inorganic chloride then produces erroneously high TOX values. Changes in sample preparation were studied to more effectively remove inorganic chloride from the activated-carbon adsorption tubes. With the TOX sample preparation equipment and TOX analyzers at WSCF, the nitrate wash recommended by EPA SW-846 method 9020B was found to be inadequate to remove inorganic chloride interference. Increasing the nitrate wash concentration from 10 grams per liter (g/L) to 100 giL potassium nitrate and increasing the nitrate wash volume from 3 milliliters (mL) to 10 mL effectively removed the inorganic chloride up to at least 100 ppm chloride in the sample matrix. Excessive purging of the adsorption tubes during sample preparation was eliminated. These changes in sample preparation have been incorporated in the analytical procedure. The results using the revised sample preparation procedure show better agreement of TOX values both for replicate analyses of single samples and for the analysis of replicate samples acquired from the same groundwater well. Furthermore, less apparent adsorption tube breakthrough now occurs with the revised procedure. One additional modification made to sample preparation was to discontinue the treatment of groundwater samples with sodium bisulfite. Sodium bisulfite is used to remove inorganic chlorine from the sample; inorganic chlorine is not expected to be a constituent in these groundwater samples. Several other factors were also investigated as possible sources of anomalous TOX results: (1) Instrument instability: examination of the history of results for TOX laboratory control samples and initial calibration verification standards indicate good long-term precision for the method and instrument. Determination of a method detection limit of 2.3 ppb in a deionized water matrix indicates the method and instrumentation have good stability and repeatability. (2) Non-linear instrument response: the instrument is shown to have good linear response from zero to 200 parts per billion (ppb) TOX. This concentration range encompasses the majority of samples received at WSCF for TOX analysis. Linear response was checked using both non-volatile TOX species (trichlorophenol) an

JG DOUGLAS; HK MEZNARICH, PHD; JR OLSEN; GA ROSS PHD; M STAUFFER

2009-02-13T23:59:59.000Z

71

VALIDATION OF ANALYTICAL METHODS AND INSTRUMENTATION FOR BERYLLIUM MEASUREMENT: REVIEW AND SUMMARY OF AVAILABLE GUIDES, PROCEDURES, AND PROTOCOLS  

SciTech Connect (OSTI)

Method validation is the process of evaluating whether an analytical method is acceptable for its intended purpose. For pharmaceutical methods, guidelines from the United States Pharmacopeia (USP), International Conference on Harmonisation (ICH), and the United States Food and Drug Administration (USFDA) provide a framework for performing such valications. In general, methods for regulatory compliance must include studies on specificity, linearity, accuracy, precision, range, detection limit, quantitation limit, and robustness. Elements of these guidelines are readily adapted to the issue of validation for beryllium sampling and analysis. This document provides a listing of available sources which can be used to validate analytical methods and/or instrumentation for beryllium determination. A literature review was conducted of available standard methods and publications used for method validation and/or quality control. A comprehensive listing of the articles, papers and books reviewed is given in the Appendix. Available validation documents and guides are listed therein; each has a brief description of application and use. In the referenced sources, there are varying approches to validation and varying descriptions of the valication process at different stages in method development. This discussion focuses on valication and verification of fully developed methods and instrumentation that have been offered up for use or approval by other laboratories or official consensus bodies such as ASTM International, the International Standards Organization (ISO) and the Association of Official Analytical Chemists (AOAC). This review was conducted as part of a collaborative effort to investigate and improve the state of validation for measuring beryllium in the workplace and the environment. Documents and publications from the United States and Europe are included. Unless otherwise specified, all referenced documents were published in English.

Ekechukwu, A

2009-05-27T23:59:59.000Z

72

Coherent Carbon Cryogel-Ammonia Borane Nanocomposites for Improved...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Carbon Cryogel-Ammonia Borane Nanocomposites for Improved Hydrogen Storage. Coherent Carbon Cryogel-Ammonia Borane Nanocomposites for Improved Hydrogen Storage. Abstract: Ammonia...

73

Method and apparatus for selective capture of gas phase analytes using metal .beta.-diketonate polymers  

DOE Patents [OSTI]

A process and sensor device are disclosed that employ metal .beta.-diketonate polymers to selectively capture gas-phase explosives and weaponized chemical agents in a sampling area or volume. The metal .beta.-diketonate polymers can be applied to surfaces in various analytical formats for detection of: improvised explosive devices, unexploded ordinance, munitions hidden in cargo holds, explosives, and chemical weapons in public areas.

Harvey, Scott D [Kennewick, WA

2011-06-21T23:59:59.000Z

74

VALIDATION OF ANALYTICAL METHODS AND INSTRUMENTATION FOR BERYLLIUM MEASUREMENT: REVIEW AND SUMMARY OF AVAILABLE GUIDES, PROCEDURES, AND PROTOCOLS  

SciTech Connect (OSTI)

This document proposes to provide a listing of available sources which can be used to validate analytical methods and/or instrumentation for beryllium determination. A literature review was conducted of available standard methods and publications used for method validation and/or quality control. A comprehensive listing of the articles, papers, and books reviewed is given in Appendix 1. Available validation documents and guides are listed in the appendix; each has a brief description of application and use. In the referenced sources, there are varying approaches to validation and varying descriptions of validation at different stages in method development. This discussion focuses on validation and verification of fully developed methods and instrumentation that have been offered up for use or approval by other laboratories or official consensus bodies such as ASTM International, the International Standards Organization (ISO) and the Association of Official Analytical Chemists (AOAC). This review was conducted as part of a collaborative effort to investigate and improve the state of validation for measuring beryllium in the workplace and the environment. Documents and publications from the United States and Europe are included. Unless otherwise specified, all documents were published in English.

Ekechukwu, A.

2008-12-17T23:59:59.000Z

75

DEVELOPMENT OF ANALYTICAL METHODS FOR DETERMINING SUPPRESSOR CONCENTRATION IN THE MCU NEXT GENERATION SOLVENT (NGS)  

SciTech Connect (OSTI)

Savannah River National Laboratory (SRNL) was tasked with identifying and developing at least one, but preferably two methods for quantifying the suppressor in the Next Generation Solvent (NGS) system. The suppressor is a guanidine derivative, N,N',N"-tris(3,7-dimethyloctyl)guanidine (TiDG). A list of 10 possible methods was generated, and screening experiments were performed for 8 of the 10 methods. After completion of the screening experiments, the non-aqueous acid-base titration was determined to be the most promising, and was selected for further development as the primary method. {sup 1}H NMR also showed promising results from the screening experiments, and this method was selected for further development as the secondary method. Other methods, including {sup 36}Cl radiocounting and ion chromatography, also showed promise; however, due to the similarity to the primary method (titration) and the inability to differentiate between TiDG and TOA (tri-n-ocytlamine) in the blended solvent, {sup 1}H NMR was selected over these methods. Analysis of radioactive samples obtained from real waste ESS (extraction, scrub, strip) testing using the titration method showed good results. Based on these results, the titration method was selected as the method of choice for TiDG measurement. {sup 1}H NMR has been selected as the secondary (back-up) method, and additional work is planned to further develop this method and to verify the method using radioactive samples. Procedures for analyzing radioactive samples of both pure NGS and blended solvent were developed and issued for the both methods.

Taylor-Pashow, K.; Fondeur, F.; White, T.; Diprete, D.; Milliken, C.

2013-07-31T23:59:59.000Z

76

Ammonia-treated phosphate glasses useful for sealing to metals  

DOE Patents [OSTI]

A method of improving surface-dependent properties of phosphate glass such as durability and wear resistance without significantly affecting its thermal expansion coefficient is provided which comprises annealing the glass in a dry ammonia atmosphere at temperatures approximating the transition temperature of the glass. The ammonia annealing treatment of the present invention is carried out for a time sufficient to allow incorporation of a thin layer of nitrogen into the surface of the phosphate glass, and the treatment improves the durability of the glass without the reduction in the thermal expansion coefficient that has restricted the effectiveness of prior ammonia treatments. The improved phosphate glass resulting from this method is superior in wear resistance, yet maintains suitable thermal expansion properties so that it may be used effectively in a variety of applications requiring hermetic glass-metal seals.

Brow, R.K.; Day, D.E.

1991-09-03T23:59:59.000Z

77

Assessment of research and development (R and D) needs in ammonia safety and environmental control  

SciTech Connect (OSTI)

This report characterizes the ammonia industry operations, reviews current knowledge of ammonia release and subsequent impacts, summarizes the status of release prevention and control methods and identify research and development needs for safety and environmental control. Appendices include: accidental spills and human exposure; adiabatic mixing of liquid nitrogen and air; fire and explosion hazards; and environmental impact rating tables. (PSB)

Brenchley, D.L.; Athey, G.F.; Bomelburg, H.J.

1981-09-01T23:59:59.000Z

78

Understanding ammonia selective catalytic reduction kinetics...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

temperature programmed reduction (TPR), and electron paramagnetic resonance (EPR) spectroscopy. Catalytic properties are examined using NO oxidation, ammonia oxidation,...

79

SRC-1 quarterly technical report, April-June 1981. [Review of analytical methods needed in SRC Demonstration plants  

SciTech Connect (OSTI)

Twenty-three papers involving the design, materials and equipment for the SRC-1 demonstration coal liquefaction plant near Newman, Daviess County, Kentucky, have been entered individually into EDB and ERA. A number of the papers deal also with the analytical methodology required for the plant, including a rather detailed evaluation of the accuracy requirements and careful evaluation of several methods such as gas chromatography, mass spectroscopy, nuclear magnetic resonance, etc. Flexibility of design is stressed so that products can be optimized for the market and charged if the market requires different products. (LTN)

Not Available

1981-10-01T23:59:59.000Z

80

A STUDY OF THE EFFECTS OF POST-COMBUSTION AMMONIA INJECTION ON FLY ASH QUALITY: CHARACTERIZATION OF AMMONIA RELEASE FROM CONCRETE AND MORTARS CONTAINING FLY ASH AS A POZZOLANIC ADMIXTURE  

SciTech Connect (OSTI)

Work completed in this reporting period focused on finalization of the Work and Management Plan, sample acquisition and analysis, evaluation of ammonia measurement methods, and measurement of ammonia loss from mortar. All fly ash samples have been acquired and analyzed for chemical composition and particle fineness. Three non-ammoniated fly ash samples were obtained from power plants that do not inject ammonia for NOx or particulate control, while three ammoniated fly ashes originate from plants that inject ammonia into the flue gas. The fly ash sources were selected based on their marketability as concrete admixtures and ammonia content. Coarse and fine aggregates for mortar and concrete testing have also been secured and have been thoroughly characterized using ASTM methods. Methodologies for the measurement of ammonia in the gaseous and aqueous phase have been carefully considered in the context of their suitability for use in this project. These include ammonia detection tubes, carbon impregnated with sulfuric acid (CISA) tubes, titration, and electrochemical methods. It was concluded that each of these methods is potentially useful for different aspects of the project, depending on the phase and concentration of ammonia to be measured. Preparation of fly ash-containing mortars both with and without ammonia indicated that the ammonia has no significant influence on compressive strength. Finally, measurement of ammonia loss from mortar has begun and the results of several of these experiments are included herein. It has been found that, under the laboratory curing conditions devised, ammonia release from mortar occurs at a relatively rapid rate in the first 24 hours, proceeded by a much slower, essentially linear rate. Furthermore, at the end of the three-week experiments, it was calculated that greater than 80% of the initial ammonia concentration remained within the mortar.

Robert F. Rathbone; Thomas L. Robl

2001-04-11T23:59:59.000Z

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Preparation of ammonia synthesis gas  

SciTech Connect (OSTI)

Ammonia synthesis gas having excess nitrogen is produced in a reactor-exchanger primary reformer followed by an autothermal secondary reformer wherein process air for the latter is preheated by heat exchange with gas turbine exhaust and the primary reformer is heated by synthesis gas from the secondary reformer.

Shires, P.J.; van Dijk, C.P.; Cassata, J.R.; Mandelik, B.G.

1984-10-30T23:59:59.000Z

82

Hydrogen production using ammonia borane  

DOE Patents [OSTI]

Hydrogen ("H.sub.2") is produced when ammonia borane reacts with a catalyst complex of the formula L.sub.nM-X wherein M is a base metal such as iron, X is an anionic nitrogen- or phosphorus-based ligand or hydride, and L is a neutral ancillary ligand that is a neutral monodentate or polydentate ligand.

Hamilton, Charles W; Baker, R. Thomas; Semelsberger, Troy A; Shrestha, Roshan P

2013-12-24T23:59:59.000Z

83

Adding Environmental Gas Physics to the Semi-Analytic Method for Galaxy Formation: Gravitational Heating  

E-Print Network [OSTI]

We present results of an attempt to include more detailed gas physics motivated from hydrodynamical simulations within semi-analytic models (SAM) of galaxy formation, focusing on the role that environmental effects play. The main difference to previous SAMs is that we include 'gravitational' heating of the intra-cluster medium (ICM) by the net surplus of gravitational potential energy released from gas that has been stripped from infalling satellites. Gravitational heating appears to be an efficient heating source able to prevent cooling in environments corresponding to dark matter halos more massive than $\\sim 10^{13} $M$_{\\odot}$. The energy release by gravitational heating can match that by AGN-feedback in massive galaxies and can exceed it in the most massive ones. However, there is a fundamental difference in the way the two processes operate. Gravitational heating becomes important at late times, when the peak activity of AGNs is already over, and it is very mass dependent. This mass dependency and time behaviour gives the right trend to recover down-sizing in the star-formation rate of massive galaxies. Abridged...

S. Khochfar; J. P. Ostriker

2007-04-18T23:59:59.000Z

84

Coal liquefaction process streams characterization and evaluation. Topical report: Analytical methods for application to coal-derived resids, A literature survey  

SciTech Connect (OSTI)

This literature survey was conducted to address an important question: What are the methods available in the realm of analytical chemistry that may have potential usefulness to the development of coal liquefaction technology? In an attempt to answer to that question, the emphasis of this survey was directed at analytical techniques which would be applicable to the high molecular weight, non-distillable residue of coal-derived liquids. It is this material which is most problematic to the analytical investigator and the developer of direct coal liquefaction processes. A number of comprehensive analytical reviews of literature dealing with coal and other fossil fuels are available. This literature survey will (1) be limited to articles published between 1980--1991, with some exceptions; (2) be limited to the use of analytical methods for high molecular weight, primarily nondistillable, fossil fuel-derived materials, except where the application of an analytical method to coals or distillates may show promise for application to non-distillable coal-derived materials; and (3) demonstrate the potential usefulness of an analytical method by showing how the method has been applied to high molecular weight, non-distillable materials, if not specifically to coal liquids. The text is divided by type of methodology, i.e. spectroscopy, microscopy, etc. Each section will be essentially free-standing. An historical background is provided.

Brandes, S.D.

1993-06-01T23:59:59.000Z

85

Development of Analytical Methods Coupled to Microdialysis Sampling for Studying Biomarkers of Oxidative Stress  

E-Print Network [OSTI]

generation would increase in biological systems due to induced oxidative stress. In one investigation, a capillary electrophoresis (CE) method with ultra-violet (UV) detection was developed employing pH-mediated stacking, an on-column preconcentration...

Hoque, Md Ehsanul

2007-12-18T23:59:59.000Z

86

Variable rate analysis of transient well test data using semi-analytical methods  

E-Print Network [OSTI]

. 4. 2. 1 Fetkovich and Vienot Data. . 4. 2. 2 Streltsova Data . 4. 2. 3 Low Productivity Gas Well DS-1 4. 2. 4 Low Productivity Gas Well CSW-1. 4. 2. 5 Low Productivity Gas Well AC-6. . 4. 2. 6 Low Productivity Gas Well TGA-21 4. 2. 7 Low... with the Material Balance Deconvolution Method and Calculated Sandface Rates . . . . . . . . . . . . . . . . . . 75 4. 1 Reservoir and Fluid Properties and Comparison of Analysis Results for Rate Normalization and Material Balance Deconvolution - Fetkovich...

Johnston, Jennifer L.

1992-01-01T23:59:59.000Z

87

Development of Analytical Methods for the Determination of Methylarginines in Serum  

E-Print Network [OSTI]

.4.1 Nitric Oxide Analysis...20 2.4.2 Methylarginine Analysis...21 2.4.2.1 Antibody-Based Analyses..21 2.4.2.2 Separations-Based Analyses..23 ix 2.4.2.2.1 Liquid Chromatography... Identification and Peak Capacity Improvement..60 3.3.3.1 Dimethylsulfoxide Addition..62 3.3.4 CE-LIF Method Characterization.67 3.3.5 NDA Derivatization..71 3.3.6 Other Separation Considerations...

Linz, Thomas

2013-05-31T23:59:59.000Z

88

An analytical method to calculate equivalent fields to irregular symmetric and asymmetric photon fields  

SciTech Connect (OSTI)

Equivalent field is frequently used for central axis depth-dose calculations of rectangular- and irregular-shaped photon beams. As most of the proposed models to calculate the equivalent square field are dosimetry based, a simple physical-based method to calculate the equivalent square field size was used as the basis of this study. The table of the sides of the equivalent square or rectangular fields was constructed and then compared with the well-known tables by BJR and Venselaar, et al. with the average relative error percentage of 2.5 2.5% and 1.5 1.5%, respectively. To evaluate the accuracy of this method, the percentage depth doses (PDDs) were measured for some special irregular symmetric and asymmetric treatment fields and their equivalent squares for Siemens Primus Plus linear accelerator for both energies, 6 and 18 MV. The mean relative differences of PDDs measurement for these fields and their equivalent square was approximately 1% or less. As a result, this method can be employed to calculate equivalent field not only for rectangular fields but also for any irregular symmetric or asymmetric field.

Tahmasebi Birgani, Mohamad J. [Department of Radiation Therapy, Golestan Hospital, JondiShapour University of Medical Science, Ahvaz (Iran, Islamic Republic of); Department of Medical Physics, JondiShapour University of Medical Sciences, Ahvaz (Iran, Islamic Republic of); Chegeni, Nahid, E-mail: nchegen@yahoo.com [Department of Medical Physics, JondiShapour University of Medical Sciences, Ahvaz (Iran, Islamic Republic of); Zabihzadeh, Mansoor; Hamzian, Nima [Department of Medical Physics, JondiShapour University of Medical Sciences, Ahvaz (Iran, Islamic Republic of)

2014-04-01T23:59:59.000Z

89

Investigations of ammonia-secondary fluid systems in supermarket refrigeration systems  

SciTech Connect (OSTI)

International agreements have legislated the phaseout of many refrigerants, including R-502 and R-12, which are commonly used in supermarket refrigeration systems. R-22 and ammonia (R-717) are candidate replacement refrigerants having appropriate thermodynamic properties. The toxicity of ammonia at low concentrations required that it be confined to the equipment room, so a secondary fluid is needed to distribute cooling to the refrigerated cases. This paper investigates ammonia-secondary fluid systems and compares their performance with equivalent R-22 systems. Both R-22 and ammonia have high compressor discharge temperatures, necessitating staged compression. Three methods of staging the compression were compared for both refrigerants. Six secondary fluids were evaluated for use with ammonia in the supermarket system. The overall system performance of the ammonia-secondary fluid refrigeration system, including both compressor and secondary fluid pump power, is governed by a large set of design parameters. The influence of these parameters on the overall system performance was studied in a systematic manner. From this parametric study, design rules leading to optimal ammonia-secondary fluid systems were developed. The performance of well-designed ammonia-secondary fluid systems was found to be 4% to 10% lower than that of R-22 systems operating under similar conditions.

McDowell, T.P. [Thermal Storage Applications Research Center, Madison, WI (United States); Mitchell, J.W.; Klein, S.A. [Univ. of Wisconsin, Madison, WI (United States). Dept. of Mechanical Engineering

1995-12-31T23:59:59.000Z

90

Polyaniline-based optical ammonia detector  

DOE Patents [OSTI]

Electronic absorption spectroscopy of a polyaniline film deposited on a polyethylene surface by chemical oxidation of aniline monomer at room temperature was used to quantitatively detect ammonia gas. The present optical ammonia gas detector was found to have a response time of less than 15 s, a regeneration time of less than 2 min. at room temperature, and a detection limit of 1 ppm (v/v) for ammonia, with a linear dynamic range from 180 ppm to 18,000 ppm.

Duan, Yixiang (Los Alamos, NM); Jin, Zhe (Los Alamos, NM); Su, Yongxuan (Los Alamos, NM)

2002-01-01T23:59:59.000Z

91

Cylinder supplied ammonia scrubber testing in IDMS  

SciTech Connect (OSTI)

This report summarizes the results of the off-line testing the Integrated DWPF Melter System (IDMS) ammonia scrubbers using ammonia supplied from cylinders. Three additional tests with ammonia are planned to verify the data collected during off-line testing. Operation of the ammonia scrubber during IDMS SRAT and SME processing will be completed during the next IDMS run. The Sludge Receipt and Adjustment Tank (SRAT) and Slurry Mix Evaporator (SME) scrubbers were successful in removing ammonia from the vapor stream to achieve ammonia vapor concentrations far below the 10 ppM vapor exit design basis. In most of the tests, the ammonia concentration in the vapor exit was lower than the detection limit of the analyzers so results are generally reported as <0.05 parts per million (ppM). During SRAT scrubber testing, the ammonia concentration was no higher than 2 ppM and during SME testing the ammonia concentration was no higher than 0.05 m.

Lambert, D.P.

1994-08-31T23:59:59.000Z

92

Ammonia-Activated Mesoporous Carbon Membranes for Gas Separations  

SciTech Connect (OSTI)

Porous carbon membranes, which generally show improved chemical and thermal stability compared to polymer membranes, have been used in gas separations for many years. In this work, we show that the post-synthesis ammonia treatment of porous carbon at elevated temperature can improve the permeance and selectivity of these membranes for the separation of carbon dioxide and hydrocarbons from permanent gases. Hierarchically structured porous carbon membranes were exposed to ammonia gas at temperatures ranging from 850 C to 950 C for up to 10 min and the N{sub 2}, CO{sub 2}, and C{sub 3}H{sub 6} permeances were measured for these different membranes. Higher treatment temperatures and longer exposure times resulted in higher gas permeance values. In addition, CO{sub 2}/N{sub 2} and C{sub 3}H{sub 6}/N{sub 2} selectivities increased by a factor of 2 as the treatment temperature and time increased up to a temperature and time of 900 C, 10 min. Higher temperatures showed increased permeance but decreased selectivity indicating excess pore activation. Nitrogen adsorption measurements show that the ammonia treatment increased the porosity of the membrane while elemental analysis revealed the presence of nitrogen-containing surface functionalities in the treated carbon membranes. Thus, ammonia treatment at high temperature provides a controlled method to introduce both added microporosity and surface functionality to enhance gas separations performance of porous carbon membranes.

Mahurin, Shannon Mark [ORNL; Lee, Jeseung [ORNL; Wang, Xiqing [ORNL; Dai, Sheng [ORNL

2011-01-01T23:59:59.000Z

93

Layer of protection analysis applied to ammonia refrigeration systems  

E-Print Network [OSTI]

Ammonia refrigeration systems are widely used in industry. Demand of these systems is expected to increase due to the advantages of ammonia as refrigerant and because ammonia is considered a green refrigerant. Therefore, it is important to evaluate...

Zuniga, Gerald Alexander

2009-05-15T23:59:59.000Z

94

Method of and apparatus for determining the similarity of a biological analyte from a model constructed from known biological fluids  

DOE Patents [OSTI]

The characteristics of a biological fluid sample having an analyte are determined from a model constructed from plural known biological fluid samples. The model is a function of the concentration of materials in the known fluid samples as a function of absorption of wideband infrared energy. The wideband infrared energy is coupled to the analyte containing sample so there is differential absorption of the infrared energy as a function of the wavelength of the wideband infrared energy incident on the analyte containing sample. The differential absorption causes intensity variations of the infrared energy incident on the analyte containing sample as a function of sample wavelength of the energy, and concentration of the unknown analyte is determined from the thus-derived intensity variations of the infrared energy as a function of wavelength from the model absorption versus wavelength function.

Robinson, Mark R. (Albuquerque, NM); Ward, Kenneth J. (Albuquerque, NM); Eaton, Robert P. (Albuquerque, NM); Haaland, David M. (Albuquerque, NM)

1990-01-01T23:59:59.000Z

95

Toxicologic evaluation of analytes from Tank 241-C-103  

SciTech Connect (OSTI)

Westinghouse Hanford Company requested PNL to assemble a toxicology review panel (TRP) to evaluate analytical data compiled by WHC, and provide advice concerning potential health effects associated with exposure to tank-vapor constituents. The team`s objectives would be to (1) review procedures used for sampling vapors from tanks, (2) identify constituents in tank-vapor samples that could be related to symptoms reported by workers, (3) evaluate the toxicological implications of those constituents by comparison to establish toxicological databases, (4) provide advice for additional analytical efforts, and (5) support other activities as requested by WHC. The TRP represents a wide range of expertise, including toxicology, industrial hygiene, and occupational medicine. The TRP prepared a list of target analytes that chemists at the Oregon Graduate Institute/Sandia (OGI), Oak Ridge National Laboratory (ORNL), and PNL used to establish validated methods for quantitative analysis of head-space vapors from Tank 241-C-103. this list was used by the analytical laboratories to develop appropriate analytical methods for samples from Tank 241-C-103. Target compounds on the list included acetone, acetonitrile, ammonia, benzene, 1, 3-butadiene, butanal, n-butanol, hexane, 2-hexanone, methylene chloride, nitric oxide, nitrogen dioxide, nitrous oxide, dodecane, tridecane, propane nitrile, sulfur oxide, tributyl phosphate, and vinylidene chloride. The TRP considered constituent concentrations, current exposure limits, reliability of data relative to toxicity, consistency of the analytical data, and whether the material was carcinogenic or teratogenic. A final consideration in the analyte selection process was to include representative chemicals for each class of compounds found.

Mahlum, D.D.; Young, J.Y.; Weller, R.E.

1994-11-01T23:59:59.000Z

96

Hydrogen Storage in Ammonia and Aminoborane Complexes  

E-Print Network [OSTI]

Hydrogen Storage in Ammonia and Aminoborane Complexes Ali Raissi Florida Solar Energy Center;Advantages of Ammonia Costs about $150 per short ton or less than $6.25 per million BTU of H2 contained and utilization Stores 30% more energy by liquid volume than LH2 Easily reformed using 16% of the energy

97

Promotion of Hydrogen Release from Ammonia Borane with Mechanically...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Promotion of Hydrogen Release from Ammonia Borane with Mechanically Activated Hexagonal Boron Nitride. Promotion of Hydrogen Release from Ammonia Borane with Mechanically Activated...

98

Acid Initiation of Ammonia-Borane Dehydrogenation for Hydrogen...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Acid Initiation of Ammonia-Borane Dehydrogenation for Hydrogen Storage. Acid Initiation of Ammonia-Borane Dehydrogenation for Hydrogen Storage. Abstract: An abstract for this...

99

Potential of High-Throughput Experimentation with Ammonia Borane...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

of High-Throughput Experimentation with Ammonia Borane Solid Hydrogen Storage Materials (presentation) Potential of High-Throughput Experimentation with Ammonia Borane Solid...

100

Geochemical and Geophysical Changes during Ammonia Gas Treatment...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Geophysical Changes during Ammonia Gas Treatment of Vadose Zone Sediments for Uranium Remediation. Geochemical and Geophysical Changes during Ammonia Gas Treatment of Vadose Zone...

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Urea/Ammonia Distribution Optimization in an SCR Emission Control...  

Broader source: Energy.gov (indexed) [DOE]

UreaAmmonia Distribution Optimization in an SCR Emission Control System Through the Use of CFD Analysis UreaAmmonia Distribution Optimization in an SCR Emission Control System...

102

Physics of Aquatic Systems II, 12. Analytical Methods Universitt HeidelbergInstitut fr Umweltphysik Physics of Aquatic Systems II  

E-Print Network [OSTI]

techniques Mass spectrometry AMS Lab tour Noble gas mass spectrometry Stable isotope mass spectrometry Radiocarbon Literature: Mook (2001), Vol. 1, ch. 10 & 11 Physics of Aquatic Systems II, 12 fundamental analytical techniques Radiometry (decay counting, radioisotopes) Mass spectrometry (mass

Aeschbach-Hertig, Werner

103

Adsorption analysis of ammonia in an aqueous solution  

SciTech Connect (OSTI)

An analysis is carried out to determine the effects of the diffusional resistance on the rate of the adsorption of ammonia in an aqueous solution. A performance prediction model is developed to calculate the local rate of heat and mass transfer, including physical and thermodynamic property calculations of the mixture. An algorithm is developed for calculating the interfacial conditions. The local heat- and mass-transfer calculation is then incorporated into the performance prediction method for adsorption for a given geometry.

Arman, B.; Panchal, C.B.

1993-08-01T23:59:59.000Z

104

Process for ammonia syngas manufacture  

SciTech Connect (OSTI)

This patent describes an improved process for reforming hydrocarbons to obtain a synthesis gas containing an approximately stoichiometric amount of hydrogen and nitrogen from which ammonia may be formed in which a hydrocarbon is reacted with steam and air in a reforming operation to obtain a first effluent. This effluent consists of hydrogen, nitrogen and carbon monoxide. The carbon monoxide is reacted in a shift conversion stage to produce a second effluent consisting of hydrogen, nitrogen, and carbon dioxide. The improved process has the additional steps of separating the second effluent into a first stream and a second stream. The first stream is reacted with air in a fuel cell to produce a byproduct stream and a product stream which is passed through a de-oxygenation stage to produce a purified stream. The second stream and the purified stream is passed into a pressure swing adsorption unit in which the synthesis gas and a waste fuel stream are separated.

Jungerhans, R.R.J.

1986-03-25T23:59:59.000Z

105

Method and apparatus for processing a test sample to concentrate an analyte in the sample from a solvent in the sample  

DOE Patents [OSTI]

A method of processing a test sample to concentrate an analyte in the sample from a solvent in the sample includes: (a) boiling the test sample containing the analyte and solvent in a boiling chamber to a temperature greater than or equal to the solvent boiling temperature and less than the analyte boiling temperature to form a rising sample vapor mixture; (b) passing the sample vapor mixture from the boiling chamber to an elongated primary separation tube, the separation tube having internal sidewalls and a longitudinal axis, the longitudinal axis being angled between vertical and horizontal and thus having an upper region and a lower region; (c) collecting the physically transported liquid analyte on the internal sidewalls of the separation tube; and (d) flowing the collected analyte along the angled internal sidewalls of the separation tube to and pass the separation tube lower region. The invention also includes passing a turbulence inducing wave through a vapor mixture to separate physically transported liquid second material from vaporized first material. Apparatus is also disclosed for effecting separations. Further disclosed is a fluidically powered liquid test sample withdrawal apparatus for withdrawing a liquid test sample from a test sample container and for cleaning the test sample container. 8 figs.

Turner, T.D.; Beller, L.S.; Clark, M.L.; Klingler, K.M.

1997-10-14T23:59:59.000Z

106

High-pressure studies of ammonia hydrates  

E-Print Network [OSTI]

Ammonia and water are major components of many planetary bodies, from comets and icy moons such as Saturn's Titan to the interiors of the planets Neptune and Uranus. Under a range of high pressures and/or low temperatures known ...

Wilson, Craig W.

2014-06-28T23:59:59.000Z

107

Process for reducing aqueous nitrate to ammonia  

DOE Patents [OSTI]

Powdered aluminum is added to a nitrate-containing alkaline, aqueous solution to reduce the nitrate and/or nitrite to ammonia and co-produce a sinterable ceramic product.

Mattus, Alfred J. (Oak Ridge, TN)

1993-01-01T23:59:59.000Z

108

Project Profile: Thermochemical Storage with Anhydrous Ammonia...  

Office of Environmental Management (EM)

The system is charged when ammonia, NH3, is heated in the Endothermic reactor by the sun (Qsol) transforming it into N2 and H2. These gasses are then cooled and stored in the...

109

Ammonia fiber explosion (AFEX) treatment of grass  

E-Print Network [OSTI]

solution), high-temperature treatment, and freezing in water suspensions at -75 C (Millett, Baker, and Satter, 1975), Chemical pretreatments include alkali and ammonia swelling, dilute acid extraction, NO with alkali, explosive steam decompression, wet... for ruminants. Ammonia explosion pulping has been investigated as an approach to fiber separation in wood chips (O' Connor, 1971). Recent work on pretreatment techniques includes: pretreatment of cedar with peracetic acid and steam explosion to improve...

Ashok, Ganesh

1991-01-01T23:59:59.000Z

110

Densities and viscosities of ternary ammonia/water fluids  

SciTech Connect (OSTI)

The densities, viscosities, and boiling points (at barometric pressure) of solutions formed by inorganic salts dissolved in an ammonia/water (NH{sub 3}/H{sub 2}O) solvent have been measured. These ternary solutions of ammonia/water/dissolved salt are being investigated to reduce rectification requirements and to expand the temperature range of ammonia/water in advanced absorption cycles. Densities and viscosities of these fluids were measured over the temperature range of 283.15 to 343.15 K (10.0 to 70.0{degrees}C). Observed densities and viscosities were expressed as empirical functions of temperature by means of the least-squares method. The dynamic viscosities of ternary fluids were found to be three to seven times greater than those of the binary system of NH{sub 3}/H{sub 2}O, which implies that a substantial decrease in the film heat and mass transfer coefficient is possible. However, because this quantitative linkage is not well understood, direct measurements of heat and mass transfer rates in a minisorber are recommended and planned.

Reiner, R.H.; Zaltash, A.

1993-03-01T23:59:59.000Z

111

Analytic Feminism: A Brief Introduction  

E-Print Network [OSTI]

This essay introduces the subject of this special issue by offering a characterization of analytic feminism in terms of its context, methods, and problem areas. I argue that analytic feminism is a legitimate sub-field both ...

Cudd, Ann E.

1995-01-01T23:59:59.000Z

112

Approximate analytical method and its use for calculation of phase velocities of acoustic plane waves in crystals for example LiNbO3  

E-Print Network [OSTI]

By means of the offered analytical method the determinant relation for a phase velocities of elastic waves for an arbitrary propagation directions in a piezoelectric crystal are received. The phase velocities of three normal elastic waves for the crystal of LiNbO3 are calculated. Results of this calculation for each of waves are presented graphically in the form of the cards allowing easily to define phase velocities in any given direction in crystal.

A. A. Golubeva

2010-07-26T23:59:59.000Z

113

E-Print Network 3.0 - ammonia gas cell Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

HYDROGEN Rebecca Dunn, Keith Lovegrove Summary: state ammonia synthesis, direct ammonia fuel-cells, combustion characterisation of ammonia... . The only products of the complete...

114

A Modified Analytical Method for Simulating Cyclic Operation of Vertical U-Tube Ground-Coupled Heat Pumps  

E-Print Network [OSTI]

as a heat source/sink for heat pumps. Using the soil rather than the ambient air as the heat source in 1 heating and the heat sink in cooling offers potential thermodynamic advantages since the earth is normally at a more favorable temperature for heat...-coupled heat exchangers have proceeded in two different directions: (1) numerical solutions of the heat diffusion equation in the soil and the ground-coil [Mei and Fischer, 1984] and (2) modified analytical solutions [Al- Juwayhel, 1981; Bose et al., 1985...

Dobson, M. K.; O'Neal, D. L.; Aldred, W.

1994-01-01T23:59:59.000Z

115

Biodegradation of bisphenol a and ibuprofen by ammonia oxidizing bacteria  

E-Print Network [OSTI]

might be responsible for the removal of these compounds. Several bacterial strains, isolated from waste water, are known to degrade BPA and ibuprofen. No studies, however, have reported using ammonia oxidizing bacteria for this purpose. Ammonia oxidizing...

Subramanya, Nethra T.

2007-09-17T23:59:59.000Z

116

ammonia monooxygenase genes: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1E-1 mgm 3 (0.14 ppm) for ammonia based unknown authors 46 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

117

archaeal ammonia oxidizers: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

showed a strong correlation with ammonia Kamat, Vineet R. 85 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

118

aqueous ammonia process: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1E-1 mgm 3 (0.14 ppm) for ammonia based unknown authors 43 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

119

ammonia removal reagent: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1E-1 mgm 3 (0.14 ppm) for ammonia based unknown authors 52 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

120

ammonia stress monitored: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1E-1 mgm 3 (0.14 ppm) for ammonia based unknown authors 33 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

ammonia lyase microcompartment: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1E-1 mgm 3 (0.14 ppm) for ammonia based unknown authors 44 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

122

ammonia nitrous oxide: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1E-1 mgm 3 (0.14 ppm) for ammonia based unknown authors 154 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

123

ammonia channel amtb: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1E-1 mgm 3 (0.14 ppm) for ammonia based unknown authors 33 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

124

aqueous ammonia solution: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1E-1 mgm 3 (0.14 ppm) for ammonia based unknown authors 244 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

125

ammonia nitrous oxides: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1E-1 mgm 3 (0.14 ppm) for ammonia based unknown authors 154 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

126

ammonia fluxes obtained: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1E-1 mgm 3 (0.14 ppm) for ammonia based unknown authors 36 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

127

archaeal ammonia monooxygenase: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1E-1 mgm 3 (0.14 ppm) for ammonia based unknown authors 74 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

128

Design and performance of an ammonia measurement system  

E-Print Network [OSTI]

Ammonia emissions from animal feeding operations (AFOs) have recently come under increased scrutiny. The US Environmental Protection Agency (EPA) has come under increased pressure from special interest groups to regulate ammonia. Regulation...

Boriack, Cale Nolan

2007-04-25T23:59:59.000Z

129

Emission factors for ammonia and particulate matter from broiler Houses  

E-Print Network [OSTI]

of ammonia will probably result in the emission of other odorants (e. g. volatile fatty acids. volatile amines, indole, phenol, sulfur-containing compounds). Ammonia is produced from the microbial breakdown of uric acid in poultry manure. The decomposition... sulfate (Barthelmie and Pryor, 1998). Additionally, ammonia is an odorant and conditions conducive to the production of ammonia will probably result in the emission of other odorants (e. g. volatile fatty acids, volatile amines, indole, phenol, sulfur...

Redwine, Jarah Suzanne

2001-01-01T23:59:59.000Z

130

Removal of ammonia from tarry water using a tubular furnace  

SciTech Connect (OSTI)

An ammonia-processing system without the use of live steam from OAO Alchevskkoks plant's supply network is considered. Steam obtained from the wastewater that leaves the ammonia column is used to process the excess tarry water, with the release of volatile ammonia.

V.V. Grabko; V.A. Kofanova; V.M. Li; M.A. Solov'ev [Giprokoks, the State Institute for the Design of Coke-Industry Enterprises, Kharkov (Ukraine)

2009-07-15T23:59:59.000Z

131

Potential Roles of Ammonia in a Hydrogen Economy  

E-Print Network [OSTI]

Potential Roles of Ammonia in a Hydrogen Economy A Study of Issues Related to the Use Ammonia economy, particularly with regard to the viability of ammonia as an on-board hydrogen carrier for fuel for On-Board Vehicular Hydrogen Storage U.S. Department of Energy #12;#12;Primary Authors: George Thomas1

132

MICROBIAL AMMONIA OXIDATION IN DEEP-SEA HYDROTHERMAL PLUMES  

E-Print Network [OSTI]

MICROBIAL AMMONIA OXIDATION IN DEEP-SEA HYDROTHERMAL PLUMES A DISSERTATION SUBMITTED;ABSTRACT Autotrophic ammonia oxidation has been documented for the first time in deep- sea hydrothermal autotrophic ammonia oxidation at ~ 91 nM d-1 , and potentially produces de novo organic carbon at a rate (0

Luther, Douglas S.

133

Ammonia and ammonium hydroxide sensors for ammonia/water absorption machines: Literature review and data compilation  

SciTech Connect (OSTI)

This report describes an evaluation of various sensing techniques for determining the ammonia concentration in the working fluid of ammonia/water absorption cycle systems. The purpose of this work was to determine if any existing sensor technology or instrumentation could provide an accurate, reliable, and cost-effective continuous measure of ammonia concentration in water. The resulting information will be used for design optimization and cycle control in an ammonia-absorption heat pump. PNL researchers evaluated each sensing technology against a set of general requirements characterizing the potential operating conditions within the absorption cycle. The criteria included the physical constraints for in situ operation, sensor characteristics, and sensor application. PNL performed an extensive literature search, which uncovered several promising sensing technologies that might be applicable to this problem. Sixty-two references were investigated, and 33 commercial vendors were identified as having ammonia sensors. The technologies for ammonia sensing are acoustic wave, refractive index, electrode, thermal, ion-selective field-effect transistor (ISFET), electrical conductivity, pH/colormetric, and optical absorption. Based on information acquired in the literature search, PNL recommends that follow-on activities focus on ISFET devices and a fiber optic evanescent sensor with a colormetric indicator. The ISFET and fiber optic evanescent sensor are inherently microminiature and capable of in situ measurements. Further, both techniques have been demonstrated selective to the ammonium ion (NH{sub 4}{sup +}). The primary issue remaining is how to make the sensors sufficiently corrosion-resistant to be useful in practice.

Anheier, N.C. Jr.; McDonald, C.E.; Cuta, J.M.; Cuta, F.M.; Olsen, K.B.

1995-05-01T23:59:59.000Z

134

AMMONIA CONCENTRATION IN SALTSTONE HEADSPACE SUMMARY REPORT  

SciTech Connect (OSTI)

The Saltstone Facility Documented Safety Analysis (DSA) is under revision to accommodate changes in the Composite Lower Flammability Limit (CLFL) from the introduction of Isopar into Tank 50. Saltstone samples were prepared with an 'MCU' type salt solution spiked with ammonia. The ammonia released from the saltstone was captured and analyzed. The ammonia concentration found in the headspace of samples maintained at 95 C and 1 atm was, to 95% confidence, less than or equal to 3.9 mg/L. Tank 50 is fed by several influent streams. The salt solution from Tank 50 is pumped to the salt feed tank (SFT) in the Saltstone Production Facility (SPF). The premix materials cement, slag and fly ash are blended together prior to transfer to the grout mixer. The premix is fed to the grout mixer in the SPF and the salt solution is incorporated into the premix in the grout mixer, yielding saltstone slurry. The saltstone slurry drops into a hopper and then is pumped to the vault. The Saltstone Facility Documented Safety Analysis (DSA) is under revision to accommodate changes in the Composite Lower Flammability Limit (CLFL) from the introduction of Isopar{reg_sign} L into Tank 50. Waste Solidification-Engineering requested that the Savannah River National Laboratory (SRNL) perform testing to characterize the release of ammonia in curing saltstone at 95 C. The test temperature represents the maximum allowable temperature in the Saltstone Disposal Facility (SDF). Ammonia may be present in the salt solution and premix materials, or may be produced by chemical reactions when the premix and salt solution are combined. A final report (SRNS-STI-2008-00120, Rev. 0) will be issued that will cover in more depth the information presented in this report.

Zamecnik, J; Alex Cozzi, A

2008-09-26T23:59:59.000Z

135

INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS Int. J. Numer. Anal. Meth. Geomech. 2011; 00:116  

E-Print Network [OSTI]

: 10.1002/nag An approach to the modelling of viscoelastic-damage. Application to the long-term creep rock; Viscoelasticity; Continuum damage; Tertiary creep; Finite element method 1. INTRODUCTION] for the modelling of rock salt. On the other hand, creep in civil engineering materials has been widely described

Paris-Sud XI, Université de

136

Optically pumped isotopic ammonia laser system  

DOE Patents [OSTI]

An optically pumped isotopic ammonia laser system which is capable of producing a plurality of frequencies in the middle infrared spectral region. Two optical pumping mechanisms are disclosed, i.e., pumping on R(J) and lasing on P(J) in response to enhancement of rotational cascade lasing including stimulated Raman effects, and, pumping on R(J) and lasing on P(J+2). The disclosed apparatus for optical pumping include a hole coupled cavity and a grating coupled cavity.

Buchwald, Melvin I. (Santa Fe, NM); Jones, Claude R. (Los Alamos, NM); Nelson, Leonard Y. (Seattle, WA)

1982-01-01T23:59:59.000Z

137

Capture and evolution of dust in planetary mean-motion resonances: a fast, semi-analytic method for generating resonantly trapped disk images  

E-Print Network [OSTI]

Dust grains migrating under Poynting-Robertson drag may be trapped in mean-motion resonances with planets. Such resonantly trapped grains are observed in the solar system. In extrasolar systems, the exozodiacal light produced by dust grains is expected to be a major obstacle to future missions attempting to directly image terrestrial planets. The patterns made by resonantly trapped dust, however, can be used to infer the presence of planets, and the properties of those planets, if the capture and evolution of the grains can be modelled. This has been done with N-body methods, but such methods are computationally expensive, limiting their usefulness when considering large, slowly evolving grains, and for extrasolar systems with unknown planets and parent bodies, where the possible parameter space for investigation is large. In this work, we present a semi-analytic method for calculating the capture and evolution of dust grains in resonance, which can be orders of magnitude faster than N-body methods. We calibr...

Shannon, Andrew; Wyatt, Mark

2015-01-01T23:59:59.000Z

138

Analytical study of bound states in graphene nano-ribbons and carbon nanotubes: The variable phase method and the relativistic Levinson theorem  

E-Print Network [OSTI]

The problem of localized states in 1D systems with the relativistic spectrum, namely, graphene stripes and carbon nanotubes, has been analytically studied. The bound state as a superposition of two chiral states is completely described by their relative phase. The criteria of bound states appearance have been obtained based on the variable phase method (VPM) and the relativistic Levinson theorem developed via the VPM. The problem of bound states is reduced to the analysis of singularities of some vector field where the Levinson theorem appears as the Poincare indices theorem for closed trajectories of this field. The reduction of the VPM equation to the non-relativistic and semi-classical limits has been done. The limit of the small momentum p_y of the transverse quantization is applicable to arbitrary integrable potential. In this case the only confined mode is predicted.

D. S. Miserev

2014-08-24T23:59:59.000Z

139

Release of ammonia from HAN-type PHA  

SciTech Connect (OSTI)

A preliminary design basis for ammonia scrubbers in the DWPF has been issued. This design basis is based on a theoretical model of ammonia evolution from the SRAT, SME and RCT. It is desirable to acquire actual process data on ammonia evolution prior to performing detailed design of scrubbers for DWPF. The evolution of ammonia from the SRAT and SME in the Integrated DWPF Melter System (IDMS) was investigated during the HM4 run. In this run, Precipitate Hydrolysis Aqueous (PHA), which was made in the Precipitate Hydrolysis Experimental Facility (PHEF) using the HAN (hydroxylamine nitrate) process was used, thus resulting in PHA with a high concentration of ammonium ion.

Zamecnik, J.R.

1992-06-10T23:59:59.000Z

140

Use and recovery of ammonia in power plant cycles  

SciTech Connect (OSTI)

The paper presents some practical and theoretical aspects of the use of ammonia in power plant water/steam cycles. The plants considered are fully automated units with once-through boilers, which operate under complex conditions and are subject to frequent starts and load changes. The boilers are chemically conditioned with combined oxygen ammonia treatment and the condensate polishing plant is only operated during start-up, in the event of a condenser leak or to remove excess ammonia. The paper also covers the recovery of ammonia from the condensate polishing plant waste regenerants and reuse for conditioning the feedwater. In particular, the paper deals with the following points: theoretical analysis of the chemical equilibrium of ammonia and carbon dioxide in water, including calculation of the concentrations from the parameters normally measured, such as conductivities and pH; equipment for monitoring and controlling the amount of ammonia fed to the water/steam cycle, including the optimum positioning of the sampling and feed-points, the parameters suitable for feed control and their temperature dependence; the partial pressure and distribution coefficient of ammonia; the consumption and losses of ammonia through the water/steam cycle during operation; the recovery of ammonia from condensate polishing plant waste regenerants by steam stripping. The paper should be of interest to both planning engineers and plant operators.

Pflug, H.D.; Bettenworth, H.J.; Syring, H.A. [Preussen Elektra AG, Hanover (Germany)

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

ammonia fuel cells: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

bit.21687 ABSTRACT: Ammonia losses during swine wastewater treatment were examined using manure; electricity; power generation Introduction Wastewater treatment using microbial...

142

acute ammonia stress: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Importantly... Steelman, Andrew Jonathan 2009-05-15 44 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

143

ammonia fiber expansion: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Krzysztof Sadlej; Eligiusz Wajnryb 2011-10-06 39 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

144

On-Board Ammonia Generation Using Delphi Diesel Fuel Reformer  

Broader source: Energy.gov (indexed) [DOE]

On-Board Ammonia Generation Using Delphi Diesel Fuel Reformer Mark Hemingway, Dr. Joachim Kupe, Joseph Bonadies, Mike Seino, Dr. John Kirwan, - Delphi Powertrain DEER, August...

145

Trends in on-road vehicle emissions of ammonia  

SciTech Connect (OSTI)

Motor vehicle emissions of ammonia have been measured at a California highway tunnel in the San Francisco Bay area. Between 1999 and 2006, light-duty vehicle ammonia emissions decreased by 38 {+-} 6%, from 640 {+-} 40 to 400 {+-} 20 mg kg{sup -1}. High time resolution measurements of ammonia made in summer 2001 at the same location indicate a minimum in ammonia emissions correlated with slower-speed driving conditions. Variations in ammonia emission rates track changes in carbon monoxide more closely than changes in nitrogen oxides, especially during later evening hours when traffic speeds are highest. Analysis of remote sensing data of Burgard et al. (Environ Sci. Technol. 2006, 40, 7018-7022) indicates relationships between ammonia and vehicle model year, nitrogen oxides, and carbon monoxide. Ammonia emission rates from diesel trucks were difficult to measure in the tunnel setting due to the large contribution to ammonia concentrations in a mixed-traffic bore that were assigned to light-duty vehicle emissions. Nevertheless, it is clear that heavy-duty diesel trucks are a minor source of ammonia emissions compared to light-duty gasoline vehicles.

Kean, A.J.; Littlejohn, D.; Ban-Weiss, G.A.; Harley, R.A.; Kirchstetter, T.W.; Lunden, M. M.

2008-07-15T23:59:59.000Z

146

Development of A Cryogenic Drift Cell Spectrometer and Methods for Improving the Analytical Figures of Merit for Ion Mobility-Mass Spectrometry Analysis  

E-Print Network [OSTI]

A cryogenic (325-80 K) ion mobility-mass spectrometer was designed and constructed in order to improve the analytical figures-of-merit for the chemical analysis of small mass analytes using ion mobility-mass spectrometry. The instrument incorporates...

May, Jody C.

2010-10-12T23:59:59.000Z

147

Ammonia removal process upgrade to the Acme Steel Coke Plant  

SciTech Connect (OSTI)

The need to upgrade the ammonia removal process at the Acme Steel Coke Plant developed with the installation of the benzene NESHAP (National Emission Standard for Hazardous Air Pollutants) equipment, specifically the replacement of the final cooler. At Acme Steel it was decided to replace the existing open cooling tower type final cooler with a closed loop direct spray tar/water final cooler. This new cooler has greatly reduced the emissions of benzene, ammonia, hydrogen sulfide and hydrogen cyanide to the atmosphere, bringing them into environmental compliance. At the time of its installation it was not fully recognized as to the effect this would have on the coke oven gas composition. In the late seventies the decision had been made at Acme Steel to stop the production of ammonia sulfate salt crystals. The direction chosen was to make a liquid ammonia sulfate solution. This product was used as a pickle liquor at first and then as a liquid fertilizer as more markets were developed. In the fall of 1986 the ammonia still was brought on line. The vapors generated from the operation of the stripping still are directed to the inlet of the ammonia absorber. At that point in time it was decided that an improvement to the cyclical ammonia removal process was needed. The improvements made were minimal yet allowed the circulation of solution through the ammonia absorber on a continuous basis. The paper describes the original batch process and the modifications made which allowed continuous removal.

Harris, J.L. [Acme Steel Co., Chicago, IL (United States). Chicago Coke Plant

1995-12-01T23:59:59.000Z

148

E-Print Network 3.0 - ammonia oxidising bacteria Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Manure Management on Methane and Ammonia Emissions Ngwa Martin Ngwabie Faculty of Landscape... and Ammonia emissions Abstract The objective of this research is to contribute to...

149

E-Print Network 3.0 - ammonia oxidation pt--pd--rd Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ammonia emissions... gaseous ammonia (NH3) which through chemical reaction in rainwater changes into ammonium ion (NH4 Source: Aneja, Viney P. - Department of Marine,...

150

E-Print Network 3.0 - ammonia results review Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ammonia emissions... gaseous ammonia (NH3) which through chemical reaction in rainwater changes into ammonium ion ... Source: Aneja, Viney P. - Department of Marine,...

151

E-Print Network 3.0 - ammonia percolated wheat Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ammonia emissions... gaseous ammonia (NH3) which through chemical reaction in rainwater changes into ammonium ion ... Source: Aneja, Viney P. - Department of Marine,...

152

E-Print Network 3.0 - ammonia oxidizer 16s Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ammonia emissions... gaseous ammonia (NH3) which through chemical reaction in rainwater changes into ammonium ion (NH4 Source: Aneja, Viney P. - Department of Marine,...

153

E-Print Network 3.0 - ammonia-oxidizing archaea diversity Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Environmental Sciences and Ecology 4 Ammonia oxidation kinetics determine niche separation of nitrifying Archaea and Bacteria Summary: LETTERS Ammonia oxidation kinetics...

154

E-Print Network 3.0 - ammonia gas sensing Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

This paper reports the first detection of methanol and ammonia from nadir viewing remote sensing instruments... First satellite observations of lower tropospheric ammonia and...

155

E-Print Network 3.0 - ammonia removal vpcar Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and simple amines early in the sewage treabnentprocess. Removal of ammonia from wastewater include... THE ALLOWABLE AMMONIA CONCENTRATIONS IN WASTEWATER TREATMENT PLANT...

156

Industrial Analytics Corporation  

SciTech Connect (OSTI)

The lost foam casting process is sensitive to the properties of the EPS patterns used for the casting operation. In this project Industrial Analytics Corporation (IAC) has developed a new low voltage x-ray instrument for x-ray radiography of very low mass EPS patterns. IAC has also developed a transmitted visible light method for characterizing the properties of EPS patterns. The systems developed are also applicable to other low density materials including graphite foams.

Industrial Analytics Corporation

2004-01-30T23:59:59.000Z

157

Milk is a common ingredient in many fried foods. Allergen cross contact can occur through the use of shared frying oil. Analytical methods are needed to determine the level of protein contamination in re-used oil. This study  

E-Print Network [OSTI]

the use of shared frying oil. Analytical methods are needed to determine the level of protein contamination in re-used oil. This study evaluated the performance of four ELISA test kits in comparison with a total protein assay for detection of milk protein residues in spiked oils that have been subjected

Heller, Barbara

158

Radiation Damage in Polarized Ammonia Solids  

E-Print Network [OSTI]

Solid NH3 and ND3 provide a highly polarizable, radiation resistant source of polarized protons and deuterons and have been used extensively in high luminosity experiments investigating the spin structure of the nucleon. Over the past twenty years, the UVA polarized target group has been instrumental in producing and polarizing much of the material used in these studies, and many practical considerations have been learned in this time. In this discussion, we analyze the polarization performance of the solid ammonia targets used during the recent JLab Eg4 run. Topics include the rate of polarization decay with accumulated charge, the annealing procedure for radiation damaged targets to recover polarization, and the radiation induced change in optimum microwave frequency used to polarize the sample. We also discuss the success we have had in implementing frequency modulation of the polarizing microwave frequency.

K. Slifer

2007-11-28T23:59:59.000Z

159

Ammonia-Free NOx Control System  

SciTech Connect (OSTI)

Research is being conducted under United States Department of Energy (DOE) Contract DEFC26-03NT41865 to develop a new technology to achieve very low levels of NOx emissions from pulverized coal fired boiler systems by employing a novel system level integration between the PC combustion process and the catalytic NOx reduction with CO present in the combustion flue gas. The combustor design and operating conditions will be optimized to achieve atypical flue gas conditions. This approach will not only suppress NOx generation during combustion but also further reduce NOx over a downstream catalytic reactor that does not require addition of an external reductant, such as ammonia. This report describes the work performed during the January 1 to March 31, 2004 time period.

S. Wu; Z. Fan; R. Herman

2004-03-31T23:59:59.000Z

160

Ammonia-Free NOx Control System  

SciTech Connect (OSTI)

Research is being conducted under United States Department of Energy (DOE) Contract DEFC26-03NT41865 to develop a new technology to achieve very low levels of NOx emissions from pulverized coal fired boiler systems by employing a novel system level integration between the PC combustion process and the catalytic NOx reduction with CO present in the combustion flue gas. The combustor design and operating conditions will be optimized to achieve atypical flue gas conditions. This approach will not only suppress NOx generation during combustion but also further reduce NOx over a downstream catalytic reactor that does not require addition of an external reductant, such as ammonia. This report describes the work performed during the October 1 to December 31, 2003 time period.

S. Wu

2003-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Retrofits: A Means for Reducing Energy Consumption in Ammonia Manufacture  

E-Print Network [OSTI]

, be fore we proceed to that discussion, it would be help ful to make a purely theoretical analysis of what the potential energy savings might be. The reaction of methane with steam and air to form ammonia is shown below. CH4 + 1.3974H20'+ 0.301302 + 1... on an ammonia production rate of 1000 STPD using natural gas feed. The process is divided into the following three sections with utilities included as an additional section: Reforming and shift C02 removal and methanation Compression and ammonia synthesis...

LeBlanc, J. R.; Moore, D. O.; Schneider, R. V., III

1982-01-01T23:59:59.000Z

162

AMMONIA RECEIVER DESIGN FOR A 500m2 Rebecca Dunn, Keith Lovegrove, and Greg Burgess  

E-Print Network [OSTI]

decomposition of ammonia to store solar energy. Ammonia passes alternately between energy-storing (dissociationAMMONIA RECEIVER DESIGN FOR A 500m2 DISH Rebecca Dunn, Keith Lovegrove, and Greg Burgess Solar 0200, Australia. Phone: +61 2 6125 4046. rebecca.dunn@anu.edu.au Abstract Previous ammonia receiver

163

Functionalized magnetic nanoparticle analyte sensor  

DOE Patents [OSTI]

A method and system for simply and efficiently determining quantities of a preselected material in a particular solution by the placement of at least one superparamagnetic nanoparticle having a specified functionalized organic material connected thereto into a particular sample solution, wherein preselected analytes attach to the functionalized organic groups, these superparamagnetic nanoparticles are then collected at a collection site and analyzed for the presence of a particular analyte.

Yantasee, Wassana; Warner, Maryin G; Warner, Cynthia L; Addleman, Raymond S; Fryxell, Glen E; Timchalk, Charles; Toloczko, Mychailo B

2014-03-25T23:59:59.000Z

164

Storm Water Analytical Period  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Storm Water Analytical Period Storm Water Analytical Period The Individual Permit authorizes the discharge of storm water associated with historical industrial activities at LANL...

165

Kinetics Study of Solid Ammonia Borane Hydrogen Release &ndash...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Hydrogen Abstract: Ammonia borane (AB), NH3BH3, is a promising material for chemical hydrogen storage with 19.6 wt% gravimetric hydrogen capacity of which 16.2 wt% hydrogen...

166

Passive Ammonia Sensor: RFID Tag Integrating Carbon Nanotubes  

E-Print Network [OSTI]

Passive Ammonia Sensor: RFID Tag Integrating Carbon Nanotubes C. Occhiuzzi (1), A.Rida(2), G. Marrocco(3) , M. M. Tentzeris(4) (1)occhiuzzi@disp.uniroma2.it (2)arida@gatech.edu (3)marrocco

Tentzeris, Manos

167

ammonia emission inventories: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Experience and Test Results From An Ammonia-Based DryWet Cooling System For Electric Power Stations Texas A&M University - TxSpace Summary: . In this concept, the reject...

168

ammonia emission inventory: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Experience and Test Results From An Ammonia-Based DryWet Cooling System For Electric Power Stations Texas A&M University - TxSpace Summary: . In this concept, the reject...

169

Energy Saving in Ammonia Plant by Using Gas Turbine  

E-Print Network [OSTI]

An ammonia plant, in which the IHI-SULZER Type 57 Gas Turbine is integrated in order to achieve energy saving, has started successful operation. Tile exhaust gas of the gas turbine has thermal energy of relatively high temperature, therefore...

Uji, S.; Ikeda, M.

1981-01-01T23:59:59.000Z

170

Membrane Based intensification of ammonia removal from wastewater  

E-Print Network [OSTI]

The aim of this research was to study a novel membrane based oxygen intensification system to enhance a biological wastewater treatment process for ammonia removal. Specifically, this work is concerned with the biological nitrification process which...

Almutairi, Azel

2011-12-31T23:59:59.000Z

171

ammonia chemical ionization: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ionization processes (more) Ozawa, Takashi 2007-01-01 69 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

172

ammonia positron emission: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nakai; Kentarou Kawaguchi; Toshiaki Takano 2000-10-25 185 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

173

ammonia compensation point: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

not only a unique opportunity to gain both Ghosh, Joydeep 54 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

174

ammonia borane complex: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

w x5-7 . Borane-triethylamine complex Boo, Jin-Hyo 43 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

175

ammonia electronic resource: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

is not required such as with rehires Ronquist, Fredrik 63 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

176

ammonia final technical: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 41 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

177

ammonia triggers exocytotic: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Beauchemin, P; The ATLAS collaboration 2010-01-01 46 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

178

acid ammonia lyase: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to forest health in the region. Sarah Jovan; Bruce Mccune 73 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

179

ammonia emission estimates: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nakai; Kentarou Kawaguchi; Toshiaki Takano 2000-10-25 153 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

180

ammonia detection based: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nakai; Kentarou Kawaguchi; Toshiaki Takano 2000-10-25 357 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

ammonia binding sites: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

et al., 2009). A mRNA can Paris-Sud XI, Universit de 247 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

182

ammonia based co2: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Time where tower levels 1-3 become Stanier, Charlie 418 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

183

ammonia solution activity: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

be in excellent agreement with our recent Goodman, Wayne 57 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

184

ammonia oxidizer community: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to nitrate. No organism in culture is known Ward, Bess 62 Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems Texas A&M University - TxSpace Summary:...

185

Urea/Ammonia Distribution Optimization in an SCR Emission Control...  

Broader source: Energy.gov (indexed) [DOE]

P-20 UreaAmmonia Distribution Optimization in an SCR Emission Control System Through the Use of CFD Analysis Gi-Heon Kim, Matthew Thornton National Renewable Energy Laboratory...

186

ammonia fuel cell: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ali as hydrogen (H2) storage compounds for fuel cell applications. Identify the pros and cons of using ammoniaBNH3) as a chemical hydrogen storage medium on-board fuel cell...

187

Multi-component removal in flue gas by aqua ammonia  

DOE Patents [OSTI]

A new method for the removal of environmental compounds from gaseous streams, in particular, flue gas streams. The new method involves first oxidizing some or all of the acid anhydrides contained in the gas stream such as sulfur dioxide (SO.sub.2) and nitric oxide (NO) and nitrous oxide (N.sub.2O) to sulfur trioxide (SO.sub.3) and nitrogen dioxide (NO.sub.2). The gas stream is subsequently treated with aqua ammonia or ammonium hydroxide which captures the compounds via chemical absorption through acid-base or neutralization reactions. The products of the reactions can be collected as slurries, dewatered, and dried for use as fertilizers, or once the slurries have been dewatered, used directly as fertilizers. The ammonium hydroxide can be regenerated and recycled for use via thermal decomposition of ammonium bicarbonate, one of the products formed. There are alternative embodiments which entail stoichiometric scrubbing of nitrogen oxides and sulfur oxides with subsequent separate scrubbing of carbon dioxide.

Yeh, James T. (Bethel Park, PA); Pennline, Henry W. (Bethel Park, PA)

2007-08-14T23:59:59.000Z

188

Derivation of general analytic gradient expressions for density-fitted post-Hartree-Fock methods: An efficient implementation for the density-fitted second-order MllerPlesset perturbation theory  

SciTech Connect (OSTI)

General analytic gradient expressions (with the frozen-core approximation) are presented for density-fitted post-HF methods. An efficient implementation of frozen-core analytic gradients for the second-order MllerPlesset perturbation theory (MP2) with the density-fitting (DF) approximation (applying to both reference and correlation energies), which is denoted as DF-MP2, is reported. The DF-MP2 method is applied to a set of alkanes, conjugated dienes, and noncovalent interaction complexes to compare the computational cost of single point analytic gradients with MP2 with the resolution of the identity approach (RI-MP2) [F. Weigend and M. Hser, Theor. Chem. Acc. 97, 331 (1997); R. A. Distasio, R. P. Steele, Y. M. Rhee, Y. Shao, and M. Head-Gordon, J. Comput. Chem. 28, 839 (2007)]. In the RI-MP2 method, the DF approach is used only for the correlation energy. Our results demonstrate that the DF-MP2 method substantially accelerate the RI-MP2 method for analytic gradient computations due to the reduced input/output (I/O) time. Because in the DF-MP2 method the DF approach is used for both reference and correlation energies, the storage of 4-index electron repulsion integrals (ERIs) are avoided, 3-index ERI tensors are employed instead. Further, as in case of integrals, our gradient equation is completely avoid construction or storage of the 4-index two-particle density matrix (TPDM), instead we use 2- and 3-index TPDMs. Hence, the I/O bottleneck of a gradient computation is significantly overcome. Therefore, the cost of the generalized-Fock matrix (GFM), TPDM, solution of Z-vector equations, the back transformation of TPDM, and integral derivatives are substantially reduced when the DF approach is used for the entire energy expression. Further application results show that the DF approach introduce negligible errors for closed-shell reaction energies and equilibrium bond lengths.

Bozkaya, U?ur, E-mail: ugur.bozkaya@atauni.edu.tr [Department of Chemistry, Atatrk University, Erzurum 25240, Turkey and Department of Chemistry, Middle East Technical University, Ankara 06800 (Turkey)

2014-09-28T23:59:59.000Z

189

Ammonia volatilization from surface application of ammonium sulfate to carbonate systems  

E-Print Network [OSTI]

from surface application of' ammonium fertilizers to calcareous soils 7 Ammonia Volatilization from Limed, Acid Soil Comparison of ammonia vole, tilization from different ammonium fertilizers Other factors affecting ammonia volatilization 10...-Newman-Keul's multiple range analysis of ammonia volatilization from a limed, acid soil supporting Coastal bermudagrass as affected by calcium carbonate . 58 Student-Newman-Keul's multiple range analysis of ammonia volatilization i'rom a limed. , acid soil supporting...

Feagley, Sam Edward

1976-01-01T23:59:59.000Z

190

Measurements of Ammonia at Blodgett Forest  

SciTech Connect (OSTI)

Ammonia is a reactive trace gas that is emitted in large quantities by animal agriculture and other sources in California, which subsequently forms aerosol particulate matter, potentially affecting visibility, climate, and human health. We performed initial measurements of NH{sub 3} at the Blodgett Forest Research Station (BFRS) during a 3 week study in June, 2006. The site is used for ongoing air quality research and is a relatively low-background site in the foothills of the Sierra Nevada. Measured NH{sub 3} mixing ratios were quite low (< 1 to {approx}2 ppb), contrasting with typical conditions in many parts of the Central Valley. Eddy covariance measurements showed NH{sub 3} fluxes that scaled with measured NH{sub 3} mixing ratio and calculated aerodynamic deposition velocity, suggesting dry deposition is a significant loss mechanism for atmospheric NH{sub 3} at BFRS. A simple model of NH{sub 3} transport to the site supports the hypothesis that NH{sub 3} is transported from the Valley to BFRS, but deposits on vegetation during the summer. Further work is necessary to determine whether the results obtained in this study can be generalized to other seasons.

Fischer, Marc L.; Littlejohn, David

2007-04-01T23:59:59.000Z

191

E-Print Network 3.0 - analytical technique progress Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collection: Biology and Medicine 57 Analytical Methods for Chemotherapeutic Drugs in Wastewater and their Removal in Septic Systems Summary: Analytical Methods for Chemotherapeutic...

192

Design, start up, and three years operating experience of an ammonia scrubbing, distillation, and destruction plant  

SciTech Connect (OSTI)

When the rebuilt Coke Plant started operations in November of 1992, it featured a completely new closed circuit secondary cooler, ammonia scrubbing, ammonia distillation, and ammonia destruction plants. This is the second plant of this type to be built in North America. To remove the ammonia from the gas, it is scrubbed with three liquids: Approximately 185 gallons/minute of cooled stripped liquor from the ammonia stills; Light oil plant condensate; and Optionally, excess flushing liquor. These scrubbers typically reduce ammonia content in the gas from 270 Grains/100 standard cubic feet to 0.2 Grains/100 standard cubic feet.

Gambert, G.

1996-12-31T23:59:59.000Z

193

CHEMICAL PROCESSING OF PURE AMMONIA AND AMMONIA-WATER ICES INDUCED BY HEAVY IONS  

SciTech Connect (OSTI)

Cosmic rays are possibly the main agents to prevent the freeze-out of molecules onto grain surfaces in cold dense clouds. Ammonia (NH{sub 3}) is one of the most abundant molecules present in dust ice mantles, with a concentration of up to 15% relative to water (H{sub 2}O). FTIR spectroscopy is used to monitor pure NH{sub 3} and NH{sub 3}-H{sub 2}O ice samples as they are irradiated with Ni and Zn ion beams (500-600 MeV) at GANIL/France. New species, such as hydrazine (N{sub 2}H{sub 4}), diazene (N{sub 2}H{sub 2} isomers), molecular hydrogen (H{sub 2}), and nitrogen (N{sub 2}) were identified after irradiation of pure NH{sub 3} ices. Nitrous oxide (N{sub 2}O), nitrogen oxide (NO), nitrogen dioxide (NO{sub 2}), and hydroxylamine (NH{sub 2}OH) are some of the products of the NH{sub 3}-H{sub 2}O ice radiolysis. The spectral band at 6.85 {mu}m was observed after irradiation of both types of ice. Besides the likely contribution of ammonium (NH{sub 4}{sup +}) and amino (NH{sub 2}) radicals, data suggest a small contribution of NH{sub 2}OH to this band profile after high fluences of irradiation of NH{sub 3}-H{sub 2}O ices. The spectral shift of the NH{sub 3} ''umbrella'' mode (9.3 {mu}m) band is parameterized as a function of NH{sub 3}/H{sub 2}O ratio in amorphous ices. Ammonia and water destruction cross-sections are obtained, as well as the rate of NH{sub 3}-H{sub 2}O (1:10) ice compaction, measured by the OH dangling bond destruction cross-section. Ammonia destruction is enhanced in the presence of H{sub 2}O in the ice and a power law relationship between stopping power and NH{sub 3} destruction cross-section is verified. Such results may provide relevant information for the evolution of molecular species in dense molecular clouds.

Bordalo, V.; Da Silveira, E. F. [Departamento de Fisica/Laboratorio do Acelerador Van de Graaff, Pontificia Universidade Catolica do Rio de Janeiro, Rua Marques de S. Vicente 225, 22451-900 Rio de Janeiro, RJ (Brazil); Lv, X. Y.; Domaracka, A.; Rothard, H.; Boduch, P. [Centre de Recherche sur les Ions, les Materiaux et la Photonique (CEA/CNRS/ENSICAEN/Universite de Caen-Basse Normandie), CIMAP-CIRIL-GANIL, Boulevard Henri Becquerel, BP 5133, F-14070 Caen Cedex 05 (France); Seperuelo Duarte, E., E-mail: vbordalo@fis.puc-rio.br [Grupo de Fisica e Astronomia, Instituto Federal do Rio de Janeiro, Rua Lucio Tavares 1045, 26530-060 Nilopolis, RJ (Brazil)

2013-09-10T23:59:59.000Z

194

100-B/C Target Analyte List Development for Soil  

SciTech Connect (OSTI)

This report documents the process used to identify source area target analytes in support of the 100-B/C remedial investigation/feasibility study addendum to DOE/RL-2008-46. This report also establishes the analyte exclusion criteria applicable for 100-B/C use and the analytical methods needed to analyze the target analytes.

R.W. Ovink

2010-03-18T23:59:59.000Z

195

E-Print Network 3.0 - atmospheric ammonia nh3 Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

assessment of ammonia as a Summary: it well suited as a medium in cooling systems, heat pumps and similar systems. Ammonia NH3 is a colourless... outlet is blocked. Absorbers...

196

Catalyst Design for Urea-less Passive Ammonia SCR Lean-Burn SIDI...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Design for Urea-less Passive Ammonia SCR Lean-Burn SIDI Aftertreatment System Catalyst Design for Urea-less Passive Ammonia SCR Lean-Burn SIDI Aftertreatment System Lean-burn SIDI...

197

3rd Generation SCR System Using Solid Ammonia Storage and Direct...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

rd Generation SCR System Using Solid Ammonia Storage and Direct Gas Dosing 3rd Generation SCR System Using Solid Ammonia Storage and Direct Gas Dosing SCR system provides direct...

198

Molecular Design of Intercalation-Based Sensors. 1. Ammonia Sensing with Quartz Crystal  

E-Print Network [OSTI]

portable, ammonia sensors has grown markedly in recent years. Ammonia sensors recently described in the literature have taken advantage of optical or electrochemical responses in both liquids and vapors

199

Computer simulation and economic analysis for ammonia fiber explosion (AFEX) pretreatment process  

E-Print Network [OSTI]

The ammonia fiber explosion (AFFECT) process is a promising new pretreatment for enhancing the reactivity of lignocerulose materials with many advantages over existing processes. The material is soaked in high-pressure liquid ammonia for a few...

Wang, Lin

1996-01-01T23:59:59.000Z

200

Safe and compact ammonia storage/delivery systems for SCR-DeNOX...  

Office of Environmental Management (EM)

Safe and compact ammonia storagedelivery systems for SCR-DeNOX in automotive units Safe and compact ammonia storagedelivery systems for SCR-DeNOX in automotive units Presentation...

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

An analytical coarse-graining method which preserves the free energy, structural correlations, and thermodynamic state of polymer melts from the atomistic to the mesoscale  

E-Print Network [OSTI]

Structural and thermodynamic consistency of coarse-graining models across multiple length scales is essential for the predictive role of multi-scale modeling and molecular dynamic simulations that use mesoscale descriptions. Our approach is a coarse-grained model based on integral equation theory, which can represent polymer chains at variable levels of chemical details. The model is analytical and depends on molecular and thermodynamic parameters of the system under study, as well as on the direct correlation function in the k --> 0 limit, c0. A numerical solution to the PRISM integral equations is used to determine c0, by adjusting the value of the effective hard sphere diameter, d, to agree with the predicted equation of state. This single quantity parameterizes the coarse-grained potential, which is used to perform mesoscale simulations that are directly compared with atomistic-level simulations of the same system. We test our coarse-graining formalism by comparing structural correlations, isothermal compressibility, equation of state, Helmholtz and Gibbs free energies, and potential energy and entropy using both united atom and coarse-grained descriptions. We find quantitative agreement between the analytical formalism for the thermodynamic properties, and the results of Molecular Dynamics simulations, independent of the chosen level of representation. In the mesoscale description, the potential energy of the soft-particle interaction becomes a free energy in the coarse-grained coordinates which preserves the excess free energy from an ideal gas across all levels of description. The structural consistency between the united-atom and mesoscale descriptions means the relative entropy between descriptions has been minimized without any variational optimization parameters. The approach is general and applicable to any polymeric system in different thermodynamic conditions.

J. McCarty; A. J. Clark; J. Copperman; M. G. Guenza

2014-07-03T23:59:59.000Z

202

An analytical coarse-graining method which preserves the free energy, structural correlations, and thermodynamic state of polymer melts from the atomistic to the mesoscale  

SciTech Connect (OSTI)

Structural and thermodynamic consistency of coarse-graining models across multiple length scales is essential for the predictive role of multi-scale modeling and molecular dynamic simulations that use mesoscale descriptions. Our approach is a coarse-grained model based on integral equation theory, which can represent polymer chains at variable levels of chemical details. The model is analytical and depends on molecular and thermodynamic parameters of the system under study, as well as on the direct correlation function in the k ? 0 limit, c{sub 0}. A numerical solution to the PRISM integral equations is used to determine c{sub 0}, by adjusting the value of the effective hard sphere diameter, d{sub HS}, to agree with the predicted equation of state. This single quantity parameterizes the coarse-grained potential, which is used to perform mesoscale simulations that are directly compared with atomistic-level simulations of the same system. We test our coarse-graining formalism by comparing structural correlations, isothermal compressibility, equation of state, Helmholtz and Gibbs free energies, and potential energy and entropy using both united atom and coarse-grained descriptions. We find quantitative agreement between the analytical formalism for the thermodynamic properties, and the results of Molecular Dynamics simulations, independent of the chosen level of representation. In the mesoscale description, the potential energy of the soft-particle interaction becomes a free energy in the coarse-grained coordinates which preserves the excess free energy from an ideal gas across all levels of description. The structural consistency between the united-atom and mesoscale descriptions means the relative entropy between descriptions has been minimized without any variational optimization parameters. The approach is general and applicable to any polymeric system in different thermodynamic conditions.

McCarty, J.; Clark, A. J.; Copperman, J.; Guenza, M. G., E-mail: mguenza@uoregon.edu [Department of Chemistry and Biochemistry, and Institute of Theoretical Science, University of Oregon, Eugene, Oregon 97403 (United States)

2014-05-28T23:59:59.000Z

203

E-Print Network 3.0 - ammonia synthesis gas Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

for ... Source: Australian National University, Department of Engineering, Solar Energy Program Collection: Renewable Energy ; Engineering 2 Solid State Ammonia Synthesis...

204

Baseload Solar Power for California? Ammonia-based Solar Energy Storage Using Trough Concentrators  

E-Print Network [OSTI]

Baseload Solar Power for California? Ammonia-based Solar Energy Storage Using Trough Concentrators to eventually optimise the reactor geometry for ammonia-based solar energy storage with troughs, which.1. Storing Solar Energy with Ammonia H2 / N2 gas liquid NH3 Heat Exchangers Power Generation (Steam Cycle

205

Evaluation of the potential for significant ammonia releases from Hanford waste tanks  

SciTech Connect (OSTI)

Ammonia is ubiquitous as a component of the waste stored in the Hanford Site single-shell tanks (SSTs) and double-shell tanks (DSTs). Because ammonia is both flammable and toxic, concerns have been raised about the amount of ammonia stored in the tanks and the possible mechanisms by which it could be released from the waste into the head space inside the tanks as well as into the surrounding atmosphere. Ammonia is a safety issue for three reasons. As already mentioned, ammonia is a flammable gas and may contribute to a flammability hazard either directly, if it reaches a high enough concentration in the tank head space, or by contributing to the flammability of other flammable gases such as hydrogen (LANL 1994). Ammonia is also toxic and at relatively low concentrations presents a hazard to human health. The level at which ammonia is considered Immediately Dangerous to Life or Health (IDLH) is 300 ppm (WHC 1993, 1995). Ammonia concentrations at or above this level have been measured inside the head space in a number of SSTs. Finally, unlike hydrogen and nitrous oxide, ammonia is highly soluble in aqueous solutions, and large amounts of ammonia can be stored in the waste as dissolved gas. Because of its high solubility, ammonia behaves in a qualitatively different manner from hydrogen or other insoluble gases. A broader range of scenarios must be considered in modeling ammonia storage and release.

Palmer, B.J.; Anderson, C.M.; Chen, G.; Cuta, J.M.; Ferryman, T.A.; Terrones, G.

1996-07-01T23:59:59.000Z

206

Corrosion protection of steel in ammonia/water heat pumps  

DOE Patents [OSTI]

Corrosion of steel surfaces in a heat pump is inhibited by adding a rare earth metal salt to the heat pump's ammonia/water working fluid. In preferred embodiments, the rare earth metal salt includes cerium, and the steel surfaces are cerated to enhance the corrosion-inhibiting effects.

Mansfeld, Florian B.; Sun, Zhaoli

2003-10-14T23:59:59.000Z

207

Original article Ammonia treatment of lucerne and cocksfoot  

E-Print Network [OSTI]

Original article Ammonia treatment of lucerne and cocksfoot harvested at two growth stages: Effect and the end of first growth. Lucerne and cocksfoot samples were treated with 30 g ammo- nia per kg DM for 4 and pepsin-cellulase digestibilities of dry matter (DM) and cell walls (CW). Lucerne had a very different CW

Paris-Sud XI, Université de

208

Transportable automated ammonia sensor based on a pulsed thermoelectrically cooled  

E-Print Network [OSTI]

Transportable automated ammonia sensor based on a pulsed thermoelectrically cooled quantum single-frequency, thermoelectrically cooled, pulsed quantum-cascade laser with an embedded distributed absorption spectroscopy with a pulsed QC DFB laser was reported in Ref. 3, where wavelength modulation

209

Analytical Chemistry Applied Mathematics  

E-Print Network [OSTI]

Analytical Chemistry Applied Mathematics Architectural Engineering Architecture Architecture Electricity Markets Environmental Engineering Food Process Engineering Food Safety & Technology Architecture Information Technology & Management Integrated Building Delivery Landscape Architecture Management

Heller, Barbara

210

CHARLOTTE: BIG DATA & ANALYTICS  

E-Print Network [OSTI]

. A Staffing Services Co. Lincoln Harris Louis Raphael -- Kizan International, Inc. Moore & Van Allen PLLCFab, Inc. UGL Services Weyco Group #12;charlottechamber.com Charlotte: Big Data & Analytics 3 12/13 330 S applies analytics to design customer services and contact strategies, to gain insights about employees

Raja, Anita

211

The method of general dimensional analysis applied to the determination of the parameters of the process of nitriding  

SciTech Connect (OSTI)

In the field of process characteristics for thermochemical treatments there is a contradiction between the great number of the parameters, that the experiment pointed out as determinants of the acquired results, and the small number of such kind of parameters that the Fick`s analytical laws can correlate. It can be ascertained that, a great deal of the complexity of diffusion processes is focused on the diffusion constant, as in the case of convection, where the coefficient of convection reflects the complexity of the process. The general dimensional analysis, created by the Romanian School of Experimental Physics as a development on a superior level of Rayleigh and Buckingham`s methods, can gather without exception, in analytical relations, all the parameters of the process of diffusion. The authors apply the method in the case of nitriding in nitrogen atmosphere with addition of ammonia.

Samoila, C.; Bot, D. [Transilvania-Univ. of Brasov (Romania)

1995-12-31T23:59:59.000Z

212

Richland Analytical Building Blocks  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of Special Nuclear Material. Data as of April 5, 2013 1 of 10 Richland Analytical Building Blocks FY 2015 in Thousands Draft Pre-Decisional PBS ABB Title FY 2015 FY 2015 FY...

213

Spark Distributed Analytic Framework  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Analytic Framework Description and Overview Apache Spark(tm) is a fast and general engine for large-scale data processing. Availibility Spark is Available on Edison in CCM...

214

Extreme Scale Visual Analytics  

SciTech Connect (OSTI)

Given the scale and complexity of today s data, visual analytics is rapidly becoming a necessity rather than an option for comprehensive exploratory analysis. In this paper, we provide an overview of three applications of visual analytics for addressing the challenges of analyzing climate, text streams, and biosurveilance data. These systems feature varying levels of interaction and high performance computing technology integration to permit exploratory analysis of large and complex data of global significance.

Steed, Chad A [ORNL] [ORNL; Potok, Thomas E [ORNL] [ORNL; Pullum, Laura L [ORNL] [ORNL; Ramanathan, Arvind [ORNL] [ORNL; Shipman, Galen M [ORNL] [ORNL; Thornton, Peter E [ORNL] [ORNL

2013-01-01T23:59:59.000Z

215

The effect of dietary protein and fiber on in vivo ammonia concentration  

E-Print Network [OSTI]

diffusion (65, 85), the more acidic the colonic contents the less absorption of ammonia should occur. In theory, then, it may be possible to counteract the potentially negative effects of a high protein diet by the addition of the appropriate type... ammonia concentration, possibly through the deamination of ingested protein. Although deamination of dietary protein by the intestinal microflora is the primary determinant of ammonia production, Krebs (45) demonstrated the presence of an L-amino acid...

Marchant, Linda Jean

1986-01-01T23:59:59.000Z

216

An analytical investigation of the sideslip maneuver  

E-Print Network [OSTI]

. 1970 ABSTBACT An Analytical Investigation of the Sideslip Maneuver. (Augu. t 1970) John Mark Alvis, 8 . S . , Texas A&M College Directed by: Professor Alfred g. Crcnk An analytical study of a-high wing, single engine aircraft in a sideslip... maneuver is presented to determine the crosswind land- ing capabilities of light, single engine aircraft. Por the purpose of this study it is assumed that all aircraft of the same type studied have similar crosswind capabilities. A method is shown...

Alvis, John Mark

1970-01-01T23:59:59.000Z

217

analytical mass spectrometry: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

analytical methods for solving a variety of molecular structure problems. Among high. Extension of mass spectrometry to the analysis of high molecular weight materials,...

218

Biodiesel Utilization: Update on Recent Analytical Techniques (Presentation)  

SciTech Connect (OSTI)

To understand and increase the use of biodiesel, analytical methods need to be shared and compared to ensure that accurate data are gathered on this complex fuel.

Alleman, T. L.; Fouts, L.; Luecke, J.; Thornton, M.; McAlpin, C.

2009-05-01T23:59:59.000Z

219

Sol-gel matrices for direct colorimetric detection of analytes  

DOE Patents [OSTI]

The present invention relates to methods and compositions for the direct detection of analytes using color changes that occur in immobilized biopolymeric material in response to selective binding of analytes to their surface. In particular, the present invention provides methods and compositions related to the encapsulation of biopolymeric material into metal oxide glass using the sol-gel method.

Charych, Deborah H. (Albany, CA); Sasaki, Darryl (Albuquerque, NM); Yamanaka, Stacey (Dallas, TX)

2000-01-01T23:59:59.000Z

220

Retention of anhydrous ammonia as influenced by clay mineral types, cations, temperature and moisture  

E-Print Network [OSTI]

to various temperature levels . . . . . ~ 20 5a 6. 70 Ammoni. a retained sxuressed as psr cent of cation-exchange capacity for olays treated with anhydrous ammonia prior to heating to various temperature levels . ~. . . . . . ~ ~ . 21 Ammonia retained... encountered in the use of anhydrous ammoni. . . REVIEW OF LITER4TURE Some of the early work with anhydx ous ammonia was done by anderson, et al. (2), and Enderson and Eattson (3). St that t1ms anhydrous ammonia as sn inorganic source of nitrogen fertiliaer...

McBee, George G

1956-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

E-Print Network 3.0 - ammonia-oxidizing bathypelagic crenarchaeota...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

University Collection: Biology and Medicine 2 Archaeal Communities in Surface Stream Sediments Contact: Tony Palumbo (palumboav@ornl.gov, 8655745845) Summary: the ammonia oxidizer...

222

E-Print Network 3.0 - ammonia emission rate Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

season... catalyst systems. The ammonia emission rate is not a design criterion for automobile catalyst systems... Atmospheric Environment 37 (2003) ... Source: Aneja, Viney P. -...

223

E-Print Network 3.0 - ammonia negative ion Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AND INTERSTELLAR ICES Summary: recently, it has been shown that the impact of 252Cf fis- sion fragments on solid ammonia produced negative... dissociative ionization of the...

224

E-Print Network 3.0 - ammonia Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Division Ir Lid., 1998 Summary: THE ALLOWABLE AMMONIA CONCENTRATIONS IN WASTEWATER TREATMENT PLANT DISCHARGE TO ENSURE PROTECl'ION OF AQUATIC... Box4395QQ.Melbourne...

225

E-Print Network 3.0 - ammonia oxidizing bacteria Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

made of the generous search support... THE ALLOWABLE AMMONIA CONCENTRATIONS IN WASTEWATER TREATMENT PLANT DISCHARGE TO ... Source: Canberra, University of - Institute for...

226

E-Print Network 3.0 - ammonia-oxidizing bacterial communities...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

List Advanced Search Sample search results for: ammonia-oxidizing bacterial communities Page: << < 1 2 3 4 5 > >> 1 AQUATIC MICROBIAL ECOLOGY Aquat Microb Ecol Summary: AA...

227

E-Print Network 3.0 - ammonia emission trends Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

5 Satellite Observations of Tropospheric Ammonia Mark W.Shephard, Karen E. Cady-Pereira, Vivienne H.Payne Summary: differences likely driven by uncertainty in emissions...

228

E-Print Network 3.0 - ammonia policy context Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

<< < 1 2 3 4 5 > >> 41 Water Quality Assessment and Analysis in Tha Chin River Basin, Thailand Summary: ; most physico-chemical parameters, such as ammonia, nitrate, nitrite,...

229

E-Print Network 3.0 - acute ammonia challenge Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Asia (coastal China, Korea and Japan) and Western Europe - experienced most acutely... Germany and the UK were also the world's leading producers of ammonia recovered from coke...

230

Obligate autotrophy in the ammonia oxidizing bacterium Nitrosomonas europaea.  

SciTech Connect (OSTI)

Closing report for project DOE-FG02-03ER15436. The project studied obligate autotrophy in the ammonia oxidizing bacterium Nitrosomonas europaea. Nitrosomonas europaea can obtain all of its energy and reductant for growth from the oxidation of ammonia to nitrite and is, therefore, classified as a chemolithotroph. This bacterium is also an autotroph, which can derive all cellular carbon from carbon dioxide. N. europaea seems incapable of growth with other carbon or energy sources. This restricted capability is surprising given that ammonia is a poor energy source. The main goal of the project was to examine the basis of autotrophy in N. europaea or, thought of another way, to determine the barriers to heterotrophy. The approach was enabled by the N. europaea genome sequence, stimulating new ways of thinking about this physiological paradoxan insistence on a single, albeit poor, energy source. Objective 1 was to examine the expression and regulation of the genes coding for alpha-ketoglutarate dehydrogenase, determine if the enzymes activity is present, and determine whether alteration of the expression levels influences autotrophic growth. Although Nitrosomonas europaea lacks measurable alpha-ketoglutarate dehydrogenase activity, the genome sequence revealed the presence of the genes encoding the enzyme. A knockout mutation was created in the sucA gene encoding the E1 subunit. Compared to wild-type cells, the mutant strain showed an accelerated loss of ammonia monooxygenase and hydroxylamine oxidoreductase activities upon entering stationary phase. In addition, unlike wild-type cells, the mutant strain showed a marked lag in the ability to resume growth in response to pH adjustments in late stationary phase. The results were published in Hommes N.G., Kurth E. G., Sayavedra-Soto L.A., and Arp D.J. (2006) Disruption of sucA, which encodes a subunit of alpha-ketoglutarate dehydrogenase, affects the survival of Nitrosomonas europaea in stationary phase. Journal of Bacteriology 188:343-347. Objective 2 was to determine the basis of fructose stimulation of growth on ammonia, examine fructose metabolism, and determine the impact of other compounds on growth on ammonia. Previous studies showed that N. europaea can utilize limited amounts of certain organic compounds, including amino acids, pyruvate, and acetate, although no organic compound has been reported to support the growth of N. europaea. The genomic sequence of N. europaea revealed a potential permease for fructose. N. europaea utilized fructose and other compounds as carbon sources to support growth. Cultures were incubated in the presence of fructose or other organic compounds in sealed bottles purged of CO(2). In these cultures, addition of either fructose or pyruvate as the sole carbon source resulted in a two- to threefold increase in optical density and protein content in 3 to 4 days. Studies with [(14)C]fructose showed that >90% of the carbon incorporated by the cells during growth was derived from fructose. Cultures containing mannose, glucose, glycerol, mannitol, citrate, or acetate showed little or no growth. N. europaea was not able to grow with fructose as an energy source, although the presence of fructose did provide an energy benefit to the cells. These results show that N. europaea can be grown in carbon dioxide free medium by using fructose and pyruvate as carbon sources and may now be considered a facultative chemolithoorganotroph. The results were published in Hommes N.G., Sayavedra-Soto L.A. and Arp. D.J. (2003). Chemolithotrophic growth of Nitrosomonas europaea on fructose. Journal of Bacteriology. 185:6809-2773. Objective 3 attempted to grow N. europaea heterotrophically through pathways predicted by the genome. Experiments with mutant strains and complementation studies were performed to test whether N. europaea can utilize other carbon sources. N. europaea was not able to grow heterotrophically in the conditions tested in this objective.

Daniel James Arp; Luis Alberto Sayavedra-Soto

2006-01-01T23:59:59.000Z

231

An Analytic Holographic Superconductor  

E-Print Network [OSTI]

We investigate a holographic superconductor that admits an analytic treatment near the phase transition. In the dual 3+1 dimensional field theory, the phase transition occurs when a scalar operator of scaling dimension two gets a vacuum expectation value. We calculate current-current correlation functions along with the speed of second sound near the critical temperature. We also make some remarks about critical exponents. An analytic treatment is possible because an underlying Heun equation describing the zero mode of the phase transition has a polynomial solution. Amusingly, the treatment here may generalize for an order parameter with any integer spin, and we propose a Lagrangian for a spin two holographic superconductor.

Christopher P. Herzog

2011-01-16T23:59:59.000Z

232

Ammonia emission inventory for the state of Wyoming  

SciTech Connect (OSTI)

Ammonia (NH{sub 3}) is the only significant gaseous base in the atmosphere and it has a variety of impacts as an atmospheric pollutant, including the formation of secondary aerosol particles: ammonium sulfate and ammonium nitrate. NH{sub 3} preferentially forms ammonium sulfate; consequently ammonium nitrate aerosol formation may be limited by the availability of NH{sub 3}. Understanding the impact of emissions of oxides of sulfur and nitrogen on visibility, therefore, requires accurately determined ammonia emission inventories for use in air quality models, upon which regulatory and policy decisions increasingly depend. This report presents an emission inventory of NH{sub 3} for the state of Wyoming. The inventory is temporally and spatially resolved at the monthly and county level, and is comprised of emissions from individual sources in ten categories: livestock, fertilizer, domestic animals, wild animals, wildfires, soil, industry, mobile sources, humans, and publicly owned treatment works. The Wyoming NH{sub 3} inventory was developed using the Carnegie Mellon University (CMU) Ammonia Model as framework. Current Wyoming-specific activity data and emissions factors obtained from state agencies and published literature were assessed and used as inputs to the CMU Ammonia Model. Biogenic emissions from soils comprise about three-quarters of the Wyoming NH{sub 3} inventory, though emission factors from soils are highly uncertain. Published emission factors are scarce and based on limited measurements. In Wyoming, agricultural land, rangeland, and forests comprise 96% of the land area and essentially all of the estimated emissions from soils. Future research on emission rates of NH{sub 3} for these land categories may lead to a substantial change in the magnitude of soil emissions, a different inventory composition, and reduced uncertainty in the inventory. While many NH{sub 3} inventories include annual emissions, air quality modeling studies require finer temporal resolution. Published studies indicate higher emission rates from soils and animal wastes at higher temperatures, and temporal variation in fertilizer application. A recent inverse modeling study indicates temporal variation in regional NH{sub 3} emissions. Monthly allocation factors were derived to estimate monthly emissions from soils, livestock and wild animal waste based on annual emission estimates. Monthly resolution of NH{sub 3} emissions from fertilizers is based on fertilizer sales to farmers. Statewide NH{sub 3} emissions are highest in the late spring and early summer months.

Kirchstetter, Thomas W.; Maser, Colette R.; Brown, Nancy J.

2003-12-17T23:59:59.000Z

233

The Fusion Curve of Ammonia and Ethyl Alcohol  

E-Print Network [OSTI]

Center for Digital Scholarship. http://kuscholarworks.ku.edu Submitted to the Graduate School of the University of Kansas for partial completion of Master of Arts. THE FUSION CURVE OF AMMONIA AND ETHYL ALCOHOL H. J. BRODERSON THE 2?03IOH CUHVB OP... AMMOHIA AND ETHXL ALCOHOL. A part of the requirement for the lh A. 2)egree. By K. J. Brodereon, University of Kangaa, May 1911, THE PUSIOB CURVS OP AliKOHlA AHD ETHYL ALCOHOL* Only within tho last fow ycara has any worlc boon done on tho fusion...

Broderson, H.J.

1911-01-01T23:59:59.000Z

234

Supplementary Information Method for Analyte Identification Using  

E-Print Network [OSTI]

an example where 2-nitrophenol and 2,4,6-trichlorophenol are simultaneously detected using the fluorescent-nitrophenol and 2,4,6-trichlorophenol Below we present typical data showing m

Santiago, Juan G.

235

HYDROCARBONS FROM PLANTS: ANALYTICAL METHODS AND OBSERVATIONS  

E-Print Network [OSTI]

petrochemical industry, The methanol residue is substantially all fermentable to ethanol. There are other plants

Calvin, Melvin

2013-01-01T23:59:59.000Z

236

HYDROCARBONS FROM PLANTS: ANALYTICAL METHODS AND OBSERVATIONS  

E-Print Network [OSTI]

or natural gas or even oil shale (which represents anotherto transform the coal or oil shale or gaseous, fuel. There

Calvin, Melvin

2013-01-01T23:59:59.000Z

237

Biomass treatment method  

DOE Patents [OSTI]

A method for treating biomass was developed that uses an apparatus which moves a biomass and dilute aqueous ammonia mixture through reaction chambers without compaction. The apparatus moves the biomass using a non-compressing piston. The resulting treated biomass is saccharified to produce fermentable sugars.

Friend, Julie (Claymont, DE); Elander, Richard T. (Evergreen, CO); Tucker, III; Melvin P. (Lakewood, CO); Lyons, Robert C. (Arvada, CO)

2010-10-26T23:59:59.000Z

238

Process and apparatus for ammonia synthesis gas production  

SciTech Connect (OSTI)

An improved process is described for the production of ammonia synthesis gas which consists of: (a) catalytically reacting a hydrocarbon feed stream with steam in a primary reforming unit to form a primary reformed gas mixture containing hydrogen and carbon monoxide; (b) passing the primary reformed gas mixture to a secondary reforming unit for reaction of unconverted methane present therein with air, the amount of the air introduced to the secondary reforming unit being considerably in excess of that required to furnish the stoichiometric amount of nitrogen required for reaction with hydrogen for the ammonia synthesis; (c) subjecting the secondary reformed gas mixture to water gas shift conversion to convert most of the carbon monoxide present in the reformed gas mixture to hydrogen and carbon dioxide; (d) passing the thus-shifted gas mixture containing hydrogen, carbon dioxide, residual carbon monoxide, methane, argon and the excess nitrogen, without necessary treatment for removal of a major portion of the carbon dioxide content thereof and without methanation to remove carbon oxides to low levels, to a pressure swing adsorption system capable of selectively adsorbing carbon dioxide, carbon monoxide, methane and other impurities from the hydrogen and from a portion of the nitrogen present in the gas passed to the system.

Fuderer, A.

1986-06-03T23:59:59.000Z

239

Waste Heat Powered Ammonia Absorption Refrigeration Unit for LPG Recovery  

SciTech Connect (OSTI)

An emerging DOE-sponsored technology has been deployed. The technology recovers light ends from a catalytic reformer plant using waste heat powered ammonia absorption refrigeration. It is deployed at the 17,000 bpd Bloomfield, New Mexico refinery of Western Refining Company. The technology recovers approximately 50,000 barrels per year of liquefied petroleum gas that was formerly being flared. The elimination of the flare also reduces CO2 emissions by 17,000 tons per year, plus tons per year reductions in NOx, CO, and VOCs. The waste heat is supplied directly to the absorption unit from the Unifiner effluent. The added cooling of that stream relieves a bottleneck formerly present due to restricted availability of cooling water. The 350oF Unifiner effluent is cooled to 260oF. The catalytic reformer vent gas is directly chilled to minus 25oF, and the FCC column overhead reflux is chilled by 25oF glycol. Notwithstanding a substantial cost overrun and schedule slippage, this project can now be considered a success: it is both profitable and highly beneficial to the environment. The capabilities of directly-integrated waste-heat powered ammonia absorption refrigeration and their benefits to the refining industry have been demonstrated.

Donald C, Energy Concepts Co.; Lauber, Eric, Western Refining Co.

2008-06-20T23:59:59.000Z

240

Anaerobic digestion for methane generation and ammonia reforming for hydrogen production  

E-Print Network [OSTI]

,000,000 digesters, 2000 [14]), among other places [15,16]. These digesters operate to generate biogas, comprisingAnaerobic digestion for methane generation and ammonia reforming for hydrogen production Accepted 24 May 2013 Available online Keywords: Anaerobic digestion Ammonia Bioenergy Bioammonia Hydrogen

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Ris-R-1504(EN) Safety assessment of ammonia as a  

E-Print Network [OSTI]

as part of the EU supported project "Ammonia Cracking for Clean Electric Power Technology" The study addresses the following activities: safety of operation of the ammonia-powered vehicle under normal.6 Comparison with methanol-powered vehicles 19 2.7 Comparison with hydrogen-powered vehicles 19 2.8 Comparison

242

Interaction of far-infrared and mid-infrared laser transitions in the ammonia laser  

SciTech Connect (OSTI)

Mid-infrared laser emission in ammonia is usually observed on a P(J + 2) transition when a CO/sub 2/ laser is used to optically pump a near resonant R(J) absorption feature. However, by generating simultaneous FIR ammonia laser emission in the same optical cavity, mid-infrared emission is obtained exclusively on the P(J) transition.

Nelson, L.Y.; Buchwald, M.I.; Jones, C.R.

1980-01-01T23:59:59.000Z

243

Analysis of Ammonia Loss Mechanisms in Microbial Fuel Cells Treating Animal Wastewater  

E-Print Network [OSTI]

ARTICLE Analysis of Ammonia Loss Mechanisms in Microbial Fuel Cells Treating Animal Wastewater Jung.interscience.wiley.com). DOI 10.1002/bit.21687 ABSTRACT: Ammonia losses during swine wastewater treatment were examined using manure; electricity; power generation Introduction Wastewater treatment using microbial fuel cells (MFCs

244

Sub-lethal ammonia toxicity in largemouth bass C.D. Suski a,,1  

E-Print Network [OSTI]

. Exposure to 100 M Tamm impaired the ability of largemouth bass to recover from exercise relative to fishSub-lethal ammonia toxicity in largemouth bass C.D. Suski a,,1 , J.D. Kieffer b , S.S. Killen a,2 Available online 24 November 2006 Abstract Guidelines for ammonia toxicity in fish are often determined

Suski, Cory David

245

Competition for Ammonia Influences the Structure of Chemotrophic1 Communities in Geothermal Springs2  

E-Print Network [OSTI]

Competition for Ammonia Influences the Structure of Chemotrophic1 Communities in Geothermal Springs in geothermal communities. These observations help to47 explain the strong pattern in the co-distribution of ammonia-oxidizing archaea and diazotrophs in48 circum-neutral to alkaline geothermal springs.49 50

de la Torre, José R.

246

Ammonia scrubber testing during IDMS SRAT and SME processing. Revision 1  

SciTech Connect (OSTI)

This report summarizes results of the Integrated DWPF (Defense Waste Processing Facility) Melter System (IDMS) ammonia scrubber testing during the PX-7 run (the 7th IDMS run with a Purex type sludge). Operation of the ammonia scrubber during IDMS Sludge Receipt and Adjustment Tank (SRAT) and Slurry Mix Evaporator (SME) processing has been completed. The ammonia scrubber was successful in removing ammonia from the vapor stream to achieve NH3 concentrations far below the 10 ppM vapor exist design basis during SRAT processing. However, during SME processing, vapor NH3 concentrations as high as 450 ppM were measured exiting the scrubber. Problems during the SRAT and SME testing were vapor bypassing the scrubber and inefficient scrubbing of the ammonia at the end of the SME cycle (50% removal efficiency; 99.9% is design basis efficiency).

Lambert, D.P.

1995-04-28T23:59:59.000Z

247

On-board ammonia generation and exhaust after treatment system using same  

DOE Patents [OSTI]

Often NOx selective catalysts that use ammonia to reduce NOx within exhaust to a harmless gas require on-board storage of ammonia which can be hazardous and inconvenient. In order to generate ammonia in exhaust, the present disclosure increases a NOx concentration in exhaust from at least one combustion chamber, at least in part, by injecting fuel in a predetermined increased NOx generation sequence that includes a first injection during non-auto ignition conditions and a second injection during auto ignition conditions. At least a portion of the NOx is converted to ammonia by passing at least a portion of the exhaust with the increased NOx concentration over an ammonia-producing catalyst.

Driscoll, Josh (Dunlap, IL); Robel, Wade J. (Peoria, IL); Brown, Cory A. (Pekin, IL); Urven, Jr., Roger L. (Colona, IL)

2010-03-30T23:59:59.000Z

248

Ammonia and urea treatment of wheat straw and corn stover JP Fontenot E Gallo Llorente, JM Obamahinti, VG Allen  

E-Print Network [OSTI]

by ammoniation directly or by urea treatment, but the improvement appears to be greater for ammonia than urea

Boyer, Edmond

249

Atmospheric Amines and Ammonia Measured with a Chemical Ionization Mass Spectrometer (CIMS)  

SciTech Connect (OSTI)

We report ambient measurements of amines and ammonia with a fast response chemical ionization mass spectrometer (CIMS) in a Southeastern U.S. forest in Alabama and a moderately polluted Midwestern site during the summer. In the Alabama forest, mostly C3-amines (from pptv to tens of pptv) and ammonia (up to 2 ppbv) were detected on a daily basis. C3-amines and ammonia showed similar diurnal trends and temperature and wind direction dependences, and were not associated with transported CO and SO2 plumes. Consistent with temperature dependences, amine and ammonia in the gas and aerosol phases showed opposite diurnal trends, indicating gas-to-particle partitioning of amines and ammonia. Temperature dependences also imply reversible processes of amines and ammonia evaporation from soil surfaces in daytime and deposition of amines and ammonia to soil surfaces at nighttime. Various amines (C1-C6) at the pptv level were observed in the transported biomass burning plumes, showing that biomass burning can be a substantial source of amines in the Southeast U.S. At the moderately polluted Kent site, higher concentrations of amines (C1-C6, from pptv to tens of pptv) and ammonia (up to 6 ppbv) were detected. Diurnal variations of C1- to C3-amines and ammonia were correlated with the ambient temperature. C4- to C6-amines showed abrupt increases during the nighttime, suggesting that they were emitted from local sources. These abundant amines and ammonia may in part explain the frequent new particle formation events reported from Kent. Lower amine concentrations at the rural forested site highlight the importance of constraining anthropogenic sources of amines.

You, Y.; Kanawade, V. P.; de Gouw, J. A.; Guenther, Alex B.; Madronich, Sasha; Sierra-Hernandez, M. R.; Lawler, M.; Smith, James N.; Takahama, S.; Ruggeri, G.; Koss, A.; Olson, K.; Baumann, K.; Weber, R. J.; Nenes, A.; Guo, H.; Edgerton, Eric S.; Porcelli, L.; Brune, W. H.; Goldstein, Allen H.; Lee, S.-H

2014-11-19T23:59:59.000Z

250

Hanford analytical services quality assurance requirements documents  

SciTech Connect (OSTI)

Hanford Analytical Services Quality Assurance Requirements Document (HASQARD) is issued by the Analytical Services, Program of the Waste Management Division, US Department of Energy (US DOE), Richland Operations Office (DOE-RL). The HASQARD establishes quality requirements in response to DOE Order 5700.6C (DOE 1991b). The HASQARD is designed to meet the needs of DOE-RL for maintaining a consistent level of quality for sampling and field and laboratory analytical services provided by contractor and commercial field and laboratory analytical operations. The HASQARD serves as the quality basis for all sampling and field/laboratory analytical services provided to DOE-RL through the Analytical Services Program of the Waste Management Division in support of Hanford Site environmental cleanup efforts. This includes work performed by contractor and commercial laboratories and covers radiological and nonradiological analyses. The HASQARD applies to field sampling, field analysis, and research and development activities that support work conducted under the Hanford Federal Facility Agreement and Consent Order Tri-Party Agreement and regulatory permit applications and applicable permit requirements described in subsections of this volume. The HASQARD applies to work done to support process chemistry analysis (e.g., ongoing site waste treatment and characterization operations) and research and development projects related to Hanford Site environmental cleanup activities. This ensures a uniform quality umbrella to analytical site activities predicated on the concepts contained in the HASQARD. Using HASQARD will ensure data of known quality and technical defensibility of the methods used to obtain that data. The HASQARD is made up of four volumes: Volume 1, Administrative Requirements; Volume 2, Sampling Technical Requirements; Volume 3, Field Analytical Technical Requirements; and Volume 4, Laboratory Technical Requirements. Volume 1 describes the administrative requirements applicable to each of the other three volumes and is intended to be used in conjunction with the technical volumes.

Hyatt, J.E.

1997-09-25T23:59:59.000Z

251

Materials corrosion in ammonia/solid heat pump working media  

SciTech Connect (OSTI)

Salt/ammonia complexes will undergo thermal cycles during use as working media for heat pumps. The interaction between container materials and complexes under thermal cyclic conditions was assessed to screen possible containment materials. Aluminum alloys 3003, 1100, and 6063 and carbon steel A214 were tested against possible heat pump working media SrCl{sub 2}/NH{sub 3}, CaBr{sub 2}/NH{sub 3}, and CaCl{sub 2}/NH{sub 3}. None of the containment materials showed susceptibility to stress corrosion cracking. While all the materials demonstrated excellent general corrosion resistance to SrCl{sub 2}/NH{sub 3}, only A214 displayed good general corrosion resistance to CaCl{sub 2}/NH{sub 3}. The complex CaBr{sub 2}/NH{sub 3} was found to be subject to thermal cyclic instability and should not be used as a heat pump working medium.

Wilson, D.F.; Howell, M.; DeVan, J.H.

1992-01-01T23:59:59.000Z

252

Formation of hydroxylamine on dust grains via ammonia oxidation  

E-Print Network [OSTI]

The quest to detect prebiotic molecules in space, notably amino acids, requires an understanding of the chemistry involving nitrogen atoms. Hydroxylamine (NH$_2$OH) is considered a precursor to the amino acid glycine. Although not yet detected, NH$_2$OH is considered a likely target of detection with ALMA. We report on an experimental investigation of the formation of hydroxylamine on an amorphous silicate surface via the oxidation of ammonia. The experimental data are then fed into a simulation of the formation of NH$_2$OH in dense cloud conditions. On ices at 14 K and with a modest activation energy barrier, NH$_2$OH is found to be formed with an abundance that never falls below a factor 10 with respect to NH$_3$. Suggestions of conditions for future observations are provided.

He, Jiao; Lemaire, Jean-Louis; Garrod, Robin T

2015-01-01T23:59:59.000Z

253

CRAIG G. FRASER"' LAGRANGE'S ANALYTICAL MATHEMATICS,  

E-Print Network [OSTI]

CRAIG G. FRASER"' LAGRANGE'S ANALYTICAL MATHEMATICS, ITS CARTESIAN ORIGINS AND RECEPTION IN COMTE to the mathematical methods developed in the preceding century by Euler and Lagrange. In the course of his discussion. . . . All his mathematical compositions are remarkable for a singular elegance, by the symmetry of forms

Fraser, Craig

254

Data and Analytics Strategy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed Newcatalyst phasesData Files Data Files 1 EIA Best Estimate ofand Analytics Strategy

255

Analytical Chemistry Laboratory: Progress report for FY 1988  

SciTech Connect (OSTI)

The purpose of this report is to summarize the activities of the Analytical Chemistry Laboratory (ACL) at Argonne National Laboratory (ANL) for fiscal year 1988 (October 1987 through September 1988). The Analytical Chemistry Laboratory is a full-cost recovery service center, with the primary mission of providing a broad range of analytical chemistry support services to the scientific and engineering programs at ANL. In addition, the ACL conducts a research program in analytical chemistry, works on instrumental and methods development, and provides analytical services for governmental, educational, and industrial organizations. The ACL handles a wide range of analytical problems, from routine standard analyses to unique problems that require significant development of methods and techniques.

Green, D.W.; Heinrich, R.R.; Graczyk, D.G.; Lindahl, P.C.; Erickson, M.D.

1988-12-01T23:59:59.000Z

256

Analytical Chemistry Laboratory progress report for FY 1991  

SciTech Connect (OSTI)

The purpose of this report is to summarize the activities of the Analytical Chemistry Laboratory (ACL) at Argonne National Laboratory (ANL) for Fiscal Year 1991 (October 1990 through September 1991). This is the eighth annual report for the ACL. The Analytical Chemistry Laboratory is a full-cost-recovery service center, with the primary mission of providing a broad range of analytical chemistry support services to the scientific and engineering programs at ANL. In addition, the ACL conducts a research program in analytical chemistry, works on instrumental and methods development, and provides analytical services for governmental, educational, and industrial organizations. The ACL handles a wide range of analytical problems, from routine standard analyses to unique problems that require significant development of methods and techniques.

Green, D.W.; Heinrich, R.R.; Graczyk, D.G.; Lindahl, P.C.; Boparai, A.S.

1991-12-01T23:59:59.000Z

257

Method for Improving Mg Doping During Group-III Nitride MOCVD  

DOE Patents [OSTI]

A method for improving Mg doping of Group III-N materials grown by MOCVD preventing condensation in the gas phase or on reactor surfaces of adducts of magnesocene and ammonia by suitably heating reactor surfaces between the location of mixing of the magnesocene and ammonia reactants and the Group III-nitride surface whereon growth is to occur.

Creighton, J. Randall (Albuquerque, NM); Wang, George T. (Albuquerque, NM)

2008-11-11T23:59:59.000Z

258

Studies of the Ammonia-soluble Organic Matter of the Soil.  

E-Print Network [OSTI]

to represent the - decomposed organic matter of the soil, and, therefore, if the theory cited above is correct, the more valuable organic matter. The.relation between the hvo forms of organic matter is largely a matter of color; while the ammonia does nct... oxtract all the organic matter from the soil, it does extract prad,ically all the black organic matter, leaving the soil residue near]? white. The organic matter of the soil soluble in ammonia is termed humus in America. The fact that the ammonia...

Fraps, G. S. (George Stronach); Hamner, N.C.

1910-01-01T23:59:59.000Z

259

Hydrogen production from the reaction of solvated electrons with benzene in water-ammonia mixtures  

SciTech Connect (OSTI)

Product analysis data for the reaction of the ammoniated electron with benzene-water mixtures in liquid ammonia show that the dominant product is evolved hydrogen and not 1,4-cyclohexadiene.

Dewald, R.R.; Jones, S.R.; Schwartz, B.S.

1980-11-27T23:59:59.000Z

260

Removal of ammonia from contaminated air in a biotrickling filter Denitrifying bioreactor combination system  

E-Print Network [OSTI]

rights reserved. 1. Introduction Ammonia emissions are very common in operations such as composting to conventional treatment which has been shown to be efficient and cost effective in a number of cases (Devinny et

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Process for removal of ammonia and acid gases from contaminated waters  

DOE Patents [OSTI]

Contaminating basic gases, i.e., ammonia and acid gases, e.g., carbon dioxide, are removed from process waters or waste waters in a combined extraction and stripping process. Ammonia in the form of ammonium ion is extracted by an immiscible organic phase comprising a liquid cation exchange component, especially an organic phosphoric acid derivative, and preferably di-2-ethyl hexyl phosphoric acid, dissolved in an alkyl hydrocarbon, aryl hydrocarbon, higher alcohol, oxygenated hydrocarbon, halogenated hydrocarbon, and mixtures thereof. Concurrently, the acidic gaseous contaminants are stripped from the process or waste waters by stripping with stream, air, nitrogen, or the like. The liquid cation exchange component has the ammonia stripped therefrom by heating, and the component may be recycled to extract additional amounts of ammonia.

King, C.J.; Mackenzie, P.D.

1982-09-03T23:59:59.000Z

262

Process for removal of ammonia and acid gases from contaminated waters  

DOE Patents [OSTI]

Contaminating basic gases, i.e., ammonia, and acid gases, e.g., carbon dioxide, are removed from process waters or waste waters in a combined extraction and stripping process. Ammonia in the form of ammonium ion is extracted by an immiscible organic phase comprising a liquid cation exchange component, especially an organic phosphoric acid derivative, and preferably di-2-ethyl hexyl phosphoric acid, dissolved in an alkyl hydrocarbon, aryl hydrocarbon, higher alcohol, oxygenated hydrocarbon, halogenated hydrocarbon, and mixtures thereof. Concurrently, the acidic gaseous contaminants are stripped from the process or waste waters by stripping with steam, air, nitrogen, or the like. The liquid cation exchange component has the ammonia stripped therefrom by heating, and the component may be recycled to extract additional amounts of ammonia.

King, C. Judson (Kensington, CA); MacKenzie, Patricia D. (Berkeley, CA)

1985-01-01T23:59:59.000Z

263

Robust Nitrogen Oxide/Ammonia Sensors for Vehicle On-board Emissions...  

Broader source: Energy.gov (indexed) [DOE]

ace079mukundan2012o.pdf More Documents & Publications Robust Nitrogen OxideAmmonia Sensors for Vehicle On-board Emissions Control Vehicle Technologies Office Merit Review 2014:...

264

Robust Nitrogen Oxide/Ammonia Sensors for Vehicle On-board Emissions...  

Broader source: Energy.gov (indexed) [DOE]

2014: Robust Nitrogen oxideAmmonia Sensors for Vehicle on-board Emissions Control CumminsORNL-FEERC CRADA: NOx Control & Measurement Technology for Heavy-Duty Diesel Engines...

265

E-Print Network 3.0 - agricultural ammonia emission Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Division Ir Lid., 1998 Summary: THE ALLOWABLE AMMONIA CONCENTRATIONS IN WASTEWATER TREATMENT PLANT DISCHARGE TO ENSURE PROTECl'ION OF AQUATIC... Box4395QQ.Melbourne VA3(XX)...

266

Ammonia Sensors Based on Doped-Sol-Gel-Tipped Optical Fibers...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Sensors Based on Doped-Sol-Gel-Tipped Optical Fibers for Catalyst System Diagnostics Ammonia Sensors Based on Doped-Sol-Gel-Tipped Optical Fibers for Catalyst System Diagnostics...

267

Liquid composition having ammonia borane and decomposing to form hydrogen and liquid reaction product  

DOE Patents [OSTI]

Liquid compositions of ammonia borane and a suitably chosen amine borane material were prepared and subjected to conditions suitable for their thermal decomposition in a closed system that resulted in hydrogen and a liquid reaction product.

Davis, Benjamin L; Rekken, Brian D

2014-04-01T23:59:59.000Z

268

Effects of lysine nutrition on production characteristics and ammonia excretion of red drum Sciaenops ocellatus  

E-Print Network [OSTI]

satiation twice daily for 6 weeks after which total ammonia nitrogen (TAN) excretion at 4-h postprandial was determined. Diets supplemented with crystalline amino acids supported similar weight gain (94 - 98%) as that obtained by fish fed control diets...

Webb, Kenneth Ashley

2002-01-01T23:59:59.000Z

269

Terra Nitrogen Company, L.P.: Ammonia Plant Greatly Reduces Natural...  

Broader source: Energy.gov (indexed) [DOE]

Terra Nitrogen Company saved 497,000 MMBtu and 3.5 million yearly after upgrading the steam system in its ammonia plant in Verdigris, Oklahoma. Terra Nitrogen Company, L.P.:...

270

Bioassimilation versus nitrification for the removal of ammonia in aquaculture biofilters  

E-Print Network [OSTI]

not receive an organic load, the glucose-loaded biofilters tended to accumulate more biomass. However, that the difference in the fraction of ammonia converted to biomass was non-significant indicates that a third process, heterotrophic nitrification-denitrification...

Kamps, Ray Herbert

1996-01-01T23:59:59.000Z

271

Development of an ammonia emission protocol and preliminary emission factor for a central Texas dairy  

E-Print Network [OSTI]

dairies. The Texas Commission on Environmental Quality (TCEQ), the Texas SAPRA, does not currently use an emission factor to permit or regulate emitted ammonia for the dairy industry. ________________________ This thesis follows the style..., and is subject to gas-phase reaction with photochemically produced hydroxyl (-OH) radicals, reaction with gaseous nitric acid (to form particulate ammonium nitrate), and with aerosols to form ammonium salts (Singh et al., 2001). Ammonia that does not react...

Rose, Adam Joseph

2004-09-30T23:59:59.000Z

272

Nitridation under ammonia of high surface area vanadium aerogels  

SciTech Connect (OSTI)

Vanadium pentoxide gels have been obtained from decavanadic acid prepared by ion exchange on a resin from ammonium metavanadate solution. The progressive removal of water by solvent exchange in supercritical conditions led to the formation of high surface area V{sub 2}O{sub 5}, 1.6H{sub 2}O aerogels. Heat treatment under ammonia has been performed on these aerogels in the 450-900 deg. C temperature range. The oxide precursors and oxynitrides have been characterized by XRD, SEM, TGA, BET. Nitridation leads to divided oxynitride powders in which the fibrous structure of the aerogel is maintained. The use of both very low heating rates and high surface area aerogel precursors allows a higher rate and a lower threshold of nitridation than those reported in previous works. By adjusting the nitridation temperature, it has been possible to prepare oxynitrides with various nitrogen enrichment and vanadium valency states. Whatever the V(O,N) composition, the oxidation of the oxynitrides in air starts between 250 and 300 deg. C. This determines their potential use as chemical gas sensors at a maximum working temperature of 250 deg. C.

Merdrignac-Conanec, Odile [Laboratoire Verres et Ceramiques, UMR CNRS 6512, Institut de Chimie de Rennes, Universite de Rennes 1, Campus de Beaulieu, F-35042 Rennes Cedex (France)]. E-mail: odile.merdrignac@univ-rennes1.fr; El Badraoui, Khadija [Laboratoire Verres et Ceramiques, UMR CNRS 6512, Institut de Chimie de Rennes, Universite de Rennes 1, Campus de Beaulieu, F-35042 Rennes Cedex (France); L'Haridon, Paul [Laboratoire Verres et Ceramiques, UMR CNRS 6512, Institut de Chimie de Rennes, Universite de Rennes 1, Campus de Beaulieu, F-35042 Rennes Cedex (France)

2005-01-15T23:59:59.000Z

273

Intensity-based Valuation of Residential Mortgages: an Analytically Tractable Model  

E-Print Network [OSTI]

Intensity-based Valuation of Residential Mortgages: an Analytically Tractable Model Vyacheslav in Mathematical Finance Abstract This paper presents an analytically tractable valuation model for residential. Our solution method is based on explicitly constructing an eigenfunction expansion of the pricing

MacIver, Malcolm A.

274

Computational Geosciences Improved Semi-Analytical Simulation of Geological Carbon Sequestration  

E-Print Network [OSTI]

Computational Geosciences Improved Semi-Analytical Simulation of Geological Carbon Sequestration of Geological Carbon Sequestration Article Type: Manuscript Keywords: Semi-Analytical Modeling; Iterative Methods; Geological Carbon Sequestration; Injection Site Assessment Corresponding Author: Brent Cody

Bau, Domenico A.

275

Analytical Chemistry Core Capability Assessment - Preliminary Report  

SciTech Connect (OSTI)

The concept of 'core capability' can be nebulous one. Even at a fairly specific level, where core capability equals maintaining essential services, it is highly dependent upon the perspective of the requestor. Samples are submitted to analytical services because the requesters do not have the capability to conduct adequate analyses themselves. Some requests are for general chemical information in support of R and D, process control, or process improvement. Many analyses, however, are part of a product certification package and must comply with higher-level customer quality assurance requirements. So which services are essential to that customer - just those for product certification? Does the customer also (indirectly) need services that support process control and improvement? And what is the timeframe? Capability is often expressed in terms of the currently utilized procedures, and most programmatic customers can only plan a few years out, at best. But should core capability consider the long term where new technologies, aging facilities, and personnel replacements must be considered? These questions, and a multitude of others, explain why attempts to gain long-term consensus on the definition of core capability have consistently failed. This preliminary report will not try to define core capability for any specific program or set of programs. Instead, it will try to address the underlying concerns that drive the desire to determine core capability. Essentially, programmatic customers want to be able to call upon analytical chemistry services to provide all the assays they need, and they don't want to pay for analytical chemistry services they don't currently use (or use infrequently). This report will focus on explaining how the current analytical capabilities and methods evolved to serve a variety of needs with a focus on why some analytes have multiple analytical techniques, and what determines the infrastructure for these analyses. This information will be useful in defining a roadmap for what future capability needs to look like.

Barr, Mary E. [Los Alamos National Laboratory; Farish, Thomas J. [Los Alamos National Laboratory

2012-05-16T23:59:59.000Z

276

Analytical Chemistry Laboratory progress report for FY 1985  

SciTech Connect (OSTI)

The Analytical Chemistry Laboratory is a full-cost-recovery service center, with the primary mission of providing a broad range of technical support services to the scientific and engineering programs at ANL. In addition, ACL conducts a research program in analytical chemistry, works on instrumental and methods development, and provides analytical services for governmental, educational, and industrial organizations. The ACL handles a wide range of analytical problems, from routine standard analyses to unique problems that require significant development of methods and techniques. The purpose of this report is to summarize the technical and administrative activities of the Analytical Chemistry Laboratory (ACL) at Argonne National Laboratory (ANL) for Fiscal Year 1985 (October 1984 through September 1985). This is the second annual report for the ACL. 4 figs., 1 tab.

Green, D.W.; Heinrich, R.R.; Jensen, K.J.

1985-12-01T23:59:59.000Z

277

DESIGN OF HYBRID POWER GENERATION CYCLES EMPLOYING AMMONIA-WATER-CARBON DIOXIDE MIXTURES  

SciTech Connect (OSTI)

A power cycle generates electricity from the heat of combustion of fossil fuels. Its efficiency is governed by the cycle configuration, the operating parameters, and the working fluid. Typical. designs use pure water as the fluid. in the last two decades, hybrid cycles based on ammonia-water, and carbon-dioxide mixtures as the working fluid have been proposed. These cycles may improve the power generation efficiency of Rankine cycles by 15%. Improved efficiency is important for two reasons: it lowers the cost of electricity being produced, and by reducing the consumption of fossil fuels per unit power, it reduces the generation of environmental pollutants. The goal of this project is to develop a computational optimization-based method for the design and analysis of hybrid bottoming power cycles to minimize the usage of fossil fuels. The development of this methodology has been achieved by formulating this task as that of selecting the least cost power cycle design from all possible configurations. They employ a detailed thermodynamic property prediction package they have developed under a DOE-FETC grant to model working fluid mixtures. Preliminary results from this work suggest that a pure NH{sub 3} cycle outperforms steam or the expensive Kalina cycle.

Ashish Gupta

2002-06-01T23:59:59.000Z

278

Analytical modeling of contaminant transport and horizontal well hydraulics  

E-Print Network [OSTI]

transport from one-, two-, and three-dimensional finite sources in a finite-thickness aquifer using Green's function method. A library of unpublished analytical solutions with different finite source geometry is provided. A graphically integrated software...

Park, Eungyu

2004-09-30T23:59:59.000Z

279

Analytical laboratory quality audits  

SciTech Connect (OSTI)

Analytical Laboratory Quality Audits are designed to improve laboratory performance. The success of the audit, as for many activities, is based on adequate preparation, precise performance, well documented and insightful reporting, and productive follow-up. Adequate preparation starts with definition of the purpose, scope, and authority for the audit and the primary standards against which the laboratory quality program will be tested. The scope and technical processes involved lead to determining the needed audit team resources. Contact is made with the auditee and a formal audit plan is developed, approved and sent to the auditee laboratory management. Review of the auditee's quality manual, key procedures and historical information during preparation leads to better checklist development and more efficient and effective use of the limited time for data gathering during the audit itself. The audit begins with the opening meeting that sets the stage for the interactions between the audit team and the laboratory staff. Arrangements are worked out for the necessary interviews and examination of processes and records. The information developed during the audit is recorded on the checklists. Laboratory management is kept informed of issues during the audit so there are no surprises at the closing meeting. The audit report documents whether the management control systems are effective. In addition to findings of nonconformance, positive reinforcement of exemplary practices provides balance and fairness. Audit closure begins with receipt and evaluation of proposed corrective actions from the nonconformances identified in the audit report. After corrective actions are accepted, their implementation is verified. Upon closure of the corrective actions, the audit is officially closed.

Kelley, William D.

2001-06-11T23:59:59.000Z

280

Insulator-based DEP with impedance measurements for analyte detection  

DOE Patents [OSTI]

Disclosed herein are microfluidic devices for assaying at least one analyte specie in a sample comprising at least one analyte concentration area in a microchannel having insulating structures on or in at least one wall of the microchannel which provide a nonuniform electric field in the presence of an electric field provided by off-chip electrodes; and a pair of passivated sensing electrodes for impedance detection in a detection area. Also disclosed are assay methods and methods of making.

Davalos, Rafael V. (Blacksburg, VA); Simmons, Blake A. (San Francisco, CA); Crocker, Robert W. (Fremont, CA); Cummings, Eric B. (Livermore, CA)

2010-03-16T23:59:59.000Z

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Summative Mass Analysis of Algal Biomass - Integration of Analytical Procedures: Laboratory Analytical Procedure (LAP)  

SciTech Connect (OSTI)

This procedure guides the integration of laboratory analytical procedures to measure algal biomass constituents in an unambiguous manner and ultimately achieve mass balance closure for algal biomass samples. Many of these methods build on years of research in algal biomass analysis.

Laurens, L. M. L.

2013-12-01T23:59:59.000Z

282

A STUDY OF THE EFFECTS OF POST-COMBUSTION AMMONIA INJECTION ON FLY ASH QUALITY: CHARACTERIZATION OF AMMONIA RELEASE FROM CONCRETE AND MORTARS CONTAINING FLY ASH AS A POZZOLANIC ADMIXTURE  

SciTech Connect (OSTI)

Work completed in this reporting period focused primarily on continuing measurements of the rate of ammonia loss from concrete, and the measurement of ammonia gas in the air above concrete and flowable fill immediately after placement. Concrete slabs were prepared to monitor the loss of ammonia during mixing, the concentration in the airspace above the slabs soon after placement, and the total quantity of ammonia evolved over a longer time period. Variables tested include temperature, ventilation rate, water:cementitious (W:C) ratio, and fly ash source. Short-term data indicate that for concrete placed in areas with poor air ventilation the fly ash NH{sub 3} concentration should not exceed about 90 to 145 mg/kg ash, depending on the water:cement ratio and the fly ash replacement rate, if a concentration of 10 ppm NH{sub 3} in the air is assumed to be the maximum acceptable level. Longer-term experiments showed that the ammonia loss rate is dependent on ammonia source (that is ammoniated ash vs. non-ammoniated ash with ammonia added to the water), and is also dependent on W:C ratio and temperature. Experiments were also conducted to study the loss of ammonia from fresh concrete during mixing. It was found that a high water:cementitious mix lost a greater percentage of ammonia than a low W:C mix, with a medium W:C mix losing an amount intermediate between these two. However, a larger batch size resulted in a smaller percentage of ammonia lost. The data suggest that a significant quantity of ammonia could be lost from Ready Mix concrete during transit, depending on the transit time, batch size, and mix proportions.

Robert F. Rathbone; Thomas L. Robl

2002-04-11T23:59:59.000Z

283

Sludge processors have wide choice of solutions for waste ammonia problems  

SciTech Connect (OSTI)

The Ocean Dumping Act of 1988 phased out dumping of sewage sludge into the ocean. To use sewage sludge beneficially, facilities treat and process it using such techniques as digestion, dewatering, composting, thermal drying and chemical stabilization. All of these processes create waste discharges containing high concentrations of nitrogen, mainly in the form of ammonia. When nitrification occurs in receiving waters, ammonia is oxidized to nitrate and can lower dissolved oxygen levels in the water. Excess ammonia also is toxic to fish and other aquatic life. Nitrogen reduction alternatives for sludge dewatering and processing waste discharges include the following: air stripping; steam stripping; breakpoint chlorination; selective ion exchange; reverse osmosis; and chemical precipitation. To remove wastewater nitrogen using biological processes, ammonia and organic nitrogen first are oxidized aerobically (nitrification) to nitrate nitrogen, which then is converted biologically to nitrogen gas (denitrification) under zero or low dissolved oxygen (anoxic) conditions. Because sludge treatment discharges contain valuable quantities of ammonia, they may be considered for reuse as supplemental fertilizer for land application or for reclamation through spraying or injection into soil. Such discharges also may be used in combustion processes.

Chen, Y.S.R.; Samela, D. (Stone and Webster Engineering Corp., Boston, MA (United States). Environmental Technology and Services Div.); Kaylor, F.

1994-09-01T23:59:59.000Z

284

Method for reducing nitrogen oxides in combustion effluents  

DOE Patents [OSTI]

Method for reducing nitrogen oxides (NO.sub.x) in the gas stream from the combustion of fossil fuels is disclosed. In a narrow gas temperature zone, NO.sub.x is converted to nitrogen by reaction with urea or ammonia with negligible remaining ammonia and other reaction pollutants. Specially designed injectors are used to introduce air atomized water droplets containing dissolved urea or ammonia into the gaseous combustion products in a manner that widely disperses the droplets exclusively in the optimum reaction temperature zone. The injector operates in a manner that forms droplet of a size that results in their vaporization exclusively in this optimum NO.sub.x -urea/ammonia reaction temperature zone. Also disclosed is a design of a system to effectively accomplish this injection.

Zauderer, Bert (Merion Station, PA)

2000-01-01T23:59:59.000Z

285

Novel Regenerated Solvent Extraction Processes for the Recovery of Carboxylic Acids or Ammonia from Aqueous Solutions Part II. Recovery of Ammonia from Sour Waters  

SciTech Connect (OSTI)

Two novel regenerated solvent extraction processes are examined. The first process has the potential to reduce the energy costs inherent in the recovery of low-volatility carboxylic acids from dilute aqueous solutions. The second process has the potential for reducing the energy costs required for separate recovery of ammonia and acid gases (e.g. CO{sub 2} and H{sub 2}S) from industrial sour waters. The recovery of carboxylic acids from dilute aqueous solution can be achieved by extraction with tertiary amines. An approach for regeneration and product recovery from such extracts is to back-extract the carboxylic acid with a water-soluble, volatile tertiary amine, such as trimethylamine. The resulting trimethylammonium carboxylate solution can be concentrated and thermally decomposed, yielding the product acid and the volatile amine for recycle. Experimental work was performed with lactic acid, SUCCiOlC acid, and fumaric acid. Equilibrium data show near-stoichiometric recovery of the carboxylic acids from an organic solution of Alamine 336 into aqueous solutions of trimethylamine. For fumaric and succinic acids, partial evaporation of the aqueous back extract decomposes the carboxylate and yields the acid product in crystalline form. The decomposition of aqueous solutions of trimethylammonium lactates was not carried out to completion, due to the high water solubility of lactic acid and the tendency of the acid to self-associate. The separate recovery of ammonia and acid gases from sour waters can be achieved by combining steam-stripping of the acid gases with simultaneous removal of ammonia by extraction with a liquid cation exchanger. The use of di-2,4,4-trimethylpentyl phosphinic acid as the liquid cation exchanger is explored in this work. Batch extraction experiments were carried out to measure the equilibrium distribution ratio of ammonia between an aqueous buffer solution and an organic solution of the phosphinic acid (0.2N) in Norpar 12. The concentration-based distribution ratios increase from 0.11 to 0.46 as the aqueous phase pH increases from 7.18 to 8.15. Regeneration of the organic extractant solution was carried out by stripping at elevated temperatures to remove the ammonia, with 99% recovery of the ammonia being obtained at 125 C.

Poole, L.J.; King, C.J.

1990-03-01T23:59:59.000Z

286

Heat transfer in the plate heat exchanger of an ammonia-synthesis column  

SciTech Connect (OSTI)

The planning and construction of high-capacity synthetic ammonia plants requires the development and fabrication of unique, high unit-power equipment with high technical and economic characteristics. In foreign and domestic practice, tubular heat exchangers with relatively low heat-transfer coefficients are used. Plate heat exchangers are a promising alternative. They are compact and have a high heat energy efficiency and a relatively small metal content. To make an experimental check of the operating capability of a plate heat exchanger under ammonia production conditions, a welded plate heat exchanger was designed for an ammonia synthesis column 800mm in diameter. On prolonged testing (four years), the device provided an autothermal operating mode in the column and the heat transfer coefficient was practically constant for fixed space velocities. Consequently, the heat exchange surface was not contaminated significantly with catalyst dust, confirmed by visual observation of the heat exchanger after disassembly.

Obolentsev, Y.G.; Chus', M.S.; Norobchanskii, O.A.; Teplitshi, Y.S.; Tovazhnyanskii, L.L.

1983-01-01T23:59:59.000Z

287

Use of ammonia to reduce the viscosity of bottoms streams produced in hydroconversion processes  

DOE Patents [OSTI]

Coal, petroleum residuum and similar carbonaceous feed materials are subjected to hydroconversion in the presence of molecular hydrogen to produce a hydroconversion effluent which is then subjected to one or more separation steps to remove lower molecular weight liquids and produce a heavy bottoms stream containing high molecular weight liquids and unconverted carbonaceous material. The viscosity of the bottoms streams produced in the separation step or steps is prevented from increasing rapidly by treating the feed to the separation step or steps with ammonia gas prior to or during the separation step or steps. The viscosity of the heavy bottoms stream produced in the final separation step is also controlled by treating these bottoms with ammonia gas. In a preferred embodiment of the invention, the effluent from the hydroconversion reactor is subjected to an atmospheric distillation followed by a vacuum distillation and the feeds to these distillations are contacted with ammonia during the distillations.

Zaczepinski, Sioma (Houston, TX); Billimoria, Rustom M. (Houston, TX); Tao, Frank (Baytown, TX); Lington, Christopher G. (Houston, TX); Plumlee, Karl W. (Baytown, TX)

1984-01-01T23:59:59.000Z

288

Electrospray ion source with reduced analyte electrochemistry  

DOE Patents [OSTI]

An electrospray ion (ESI) source and method capable of ionizing an analyte molecule without oxidizing or reducing the analyte of interest. The ESI source can include an emitter having a liquid conduit, a working electrode having a liquid contacting surface, a spray tip, a secondary working electrode, and a charge storage coating covering partially or fully the liquid contacting surface of the working electrode. The liquid conduit, the working electrode and the secondary working electrode can be in liquid communication. The electrospray ion source can also include a counter electrode proximate to, but separated from, said spray tip. The electrospray ion source can also include a power system for applying a voltage difference between the working electrodes and a counter-electrode. The power system can deliver pulsed voltage changes to the working electrodes during operation of said electrospray ion source to minimize the surface potential of the charge storage coating.

Kertesz, Vilmos; Van Berkel, Gary J

2013-07-30T23:59:59.000Z

289

Electrospray ion source with reduced analyte electrochemistry  

DOE Patents [OSTI]

An electrospray ion (ESI) source and method capable of ionizing an analyte molecule without oxidizing or reducing the analyte of interest. The ESI source can include an emitter having a liquid conduit, a working electrode having a liquid contacting surface, a spray tip, a secondary working electrode, and a charge storage coating covering partially or fully the liquid contacting surface of the working electrode. The liquid conduit, the working electrode and the secondary working electrode can be in liquid communication. The electrospray ion source can also include a counter electrode proximate to, but separated from, said spray tip. The electrospray ion source can also include a power system for applying a voltage difference between the working electrodes and a counter-electrode. The power system can deliver pulsed voltage changes to the working electrodes during operation of said electrospray ion source to minimize the surface potential of the charge storage coating.

Kertesz, Vilmos [Knoxville, TN; Van Berkel, Gary [Clinton, TN

2011-08-23T23:59:59.000Z

290

A STUDY OF THE EFFECTS OF POST-COMBUSTION AMMONIA INJECTION ON FLY ASH QUALITY: CHARACTERIZATION OF AMMONIA RELEASE FROM CONCRETE AND MORTARS CONTAINING FLY ASH AS A POZZOLANIC ADMIXTURE  

SciTech Connect (OSTI)

The Clean Air Act Amendments of 1990 require large reductions in emissions of NO{sub x} from coal-fired electric utility boilers. This will necessitate the use of ammonia injection, such as in selective catalytic reduction (SCR), in many power plants, resulting in the deposition of ammonia on the fly ash. The presence of ammonia could create a major barrier to fly ash utilization in concrete because of odor concerns. Although there have been limited studies of ammonia emission from concrete, little is known about the quantity of ammonia emitted during mixing and curing, and the kinetics of ammonia release. This is manifested as widely varying opinions within the concrete and ash marketing industry regarding the maximum acceptable levels of ammonia in fly ash. Therefore, practical guidelines for using ammoniated fly ash are needed in advance of the installation of many more SCR systems. The goal of this project was to develop practical guidelines for the handling and utilization of ammoniated fly ash in concrete, in order to prevent a decrease in the use of fly ash for this application. The objective was to determine the amount of ammonia that is released, over the short- and long-term, from concrete that contains ammoniated fly ash. The technical approach in this project was to measure the release of ammonia from mortar and concrete during mixing, placement, and curing. Work initially focused on laboratory mortar experiments to develop fundamental data on ammonia diffusion characteristics. Larger-scale laboratory experiments were then conducted to study the emission of ammonia from concrete containing ammoniated fly ash. The final phase comprised monitoring ammonia emissions from large concrete slabs. The data indicated that, on average, 15% of the initial ammonia was lost from concrete during 40 minutes of mixing, depending on the mix proportions and batch size. Long-term experiments indicated that ammonia diffusion from concrete was relatively slow, with greater than 50% of the initial ammonia content remaining in an 11cm thick concrete slab after 1 month. When placing concrete in an enclosed space, with negligible ventilation, it is recommended that the ammonia concentration in the concrete mix water should not exceed 110 mg NH{sub 3}/L, if the NIOSH exposure limit of 25 ppm in the air is not to be exceeded. If even a modicum of ventilation is present, then the ammonia concentration in the concrete water should be less than 170 mg/L. The maximum level of ammonia in the fly ash can then be calculated using these limits if the concrete mix proportions are known. In general, during the mixing and placement of ammonia-laden concrete, no safety concerns were encountered. The only location where the ammonia concentration attained high levels (i.e. > 25 ppm in the air) was within the concrete mixing drum.

Robert F. Rathbone; Thomas L. Robl

2002-10-30T23:59:59.000Z

291

Evaluation of calcium chloride and ammonium thiosulfate as ammonia volatilization inhibitors for surface-applied urea  

E-Print Network [OSTI]

(Fenn and Kissel, 1973). Ammonia exiting the soil chainber with the air-flow was captured in a boric acid indicator trap containing 40 mL of boric acid indicator solution. The boric acid indicator traps were changed every 24 h and titrated... as 90%. Calcium chloride reacts with the (NH4)2CO2 formed during urea hydrolysis in the following manner: (NH4)2CO2 + CaC12 CaCO& + 2NH4C1 Ammonium chloride is a slightly acidic product and does not produce (NH4)2CO2 in a calcareous soil. Ammonia...

Sloan, John J.

1989-01-01T23:59:59.000Z

292

Ammonia volatilization and nitrogen transformations in high pH soils used for beef manure disposal  

E-Print Network [OSTI]

. The total nitrogen losses in the limed treatments were believed to be caused by the high solubility of organic matter in high pH solutions followed by chemical volatilization of nitrogen as ammonia. Most of this ammonia was believed to have remained... as par t of the soil air and was lost when the soil samples were taken from the columns. Denitrification was believed to be responsible for losses in the unlimed treatments. Comparison of final organic and total inorganic nitrogen concen- trationss...

Peters, Robert Edgar

1972-01-01T23:59:59.000Z

293

Adsorption of water and ammonia on TiO2-anatase cluster models Isik Onal a,*, Sezen Soyer a  

E-Print Network [OSTI]

to the surface properties and the adsorption reactions of titanium dioxide-anatase surface. Lin and Bai [3 reserved. Keywords: TiO2; Anatase; Adsorption; Water; Ammonia; DFT 1. Introduction Titanium oxides are usedAdsorption of water and ammonia on TiO2-anatase cluster models Isik Onal a,*, Sezen Soyer a , Selim

Senkan, Selim M.

294

A STUDY OF THE EFFECTS OF POST-COMBUSTION AMMONIA INJECTION ON FLY ASH QUALITY: CHARACTERIZATION OF AMMONIA RELEASE FROM CONCRETE AND MORTARS CONTAINING FLY ASH AS A POZZOLANIC ADMIXTURE  

SciTech Connect (OSTI)

Work completed in this reporting period focused on the measurement of the rate of ammonia loss from mortar and concrete, and the measurement of ammonia gas in the air above the materials immediately after placement. The majority of mortar experiments have been completed, and testing has begun on concrete. The mortar experiments indicate that the rate of ammonia loss is greater in mortars prepared using a higher water content and water:cement (W:C) ratio, although the higher rate is primarily observed within the first 2 days, after which the loss rates are nearly the same. The source of low-calcium (Class F) fly ash exerted a negligible influence on the loss rate. However, mortar prepared using a higher-calcium fly ash evolved ammonia at a slightly slower rate than the Class F ash mortars. The data also indicate that an increase in ventilation increases the ammonia loss rate from mortar, and suggest that a well-ventilated space could substantially increase the loss of ammonia from mortar and, by inference, a concrete slab. Analysis of ammonia concentrations in the air above freshly-placed mortars in an enclosed space indicate that the fly ash ammonia concentration should not exceed 100 mg N/kg ash in confined space applications. For most other applications with some ventilation the maximum acceptable concentration would be approximately 200 mg/kg. Early results from experiments on concrete suggest that, under similar conditions, ammonia diffusion from concrete occurs at a higher rate than in mortar. In addition, increasing the slump of concrete through the use of chemical admixtures has only a minor effect on the ammonia loss rate.

Robert F. Rathbone; Thomas L. Robl

2001-10-11T23:59:59.000Z

295

Portable apparatus for separating sample and detecting target analytes  

DOE Patents [OSTI]

Portable devices and methods for determining the presence of a target analyte using a portable device are provided. The portable device is preferably hand-held. A sample is injected to the portable device. A microfluidic separation is performed within the portable device and at least one separated component detected by a detection module within the portable device, in embodiments of the invention. A target analyte is identified, based on the separated component, and the presence of the target analyte is indicated on an output interface of the portable device, in accordance with embodiments of the invention.

Renzi, Ronald F. (Tracy, CA); Wally, Karl (Lafayette, CA); Crocker, Robert W. (Fremont, CA); Stamps, James F. (Livermore, CA); Griffiths; Stewart K. , (Livermore, CA); Fruetel, Julia A. (Livermore, CA); Horn, Brent A. (Roy, UT); Shokair, Isaac R. (Livermore, CA); Yee, Daniel D. (Dublin, CA); VanderNoot, Victoria A. (Pleasanton, CA); Wiedenman, Boyd J. (Aiken, SC); West, Jason A. A. (Pleasanton, CA); Ferko, Scott M. (Livermore, CA)

2008-11-18T23:59:59.000Z

296

Ammonia as an Alternative Energy Storage Medium for Hydrogen Fuel Cells: Scientific and Technical Review for Near-Term Stationary Power Demonstration Projects, Final Report  

E-Print Network [OSTI]

Ocean Thermal Energy Conversion (OTC) Applications, William Kumm, Arctic Energies, Ltd, Ammonia - The Key to US Energy Independence Conference

Lipman, Tim; Shah, Nihar

2007-01-01T23:59:59.000Z

297

Ammonia as an Alternative Energy Storage Medium for Hydrogen Fuel Cells: Scientific and Technical Review for Near-Term Stationary Power Demonstration Projects, Final Report  

E-Print Network [OSTI]

6 Autothermal Reforming ofHacker and Kordesch, 2003 Autothermal ammonia decompositionenergy needed for their autothermal reformer and also

Lipman, Tim; Shah, Nihar

2007-01-01T23:59:59.000Z

298

analytical glow discharge: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

29 Glow Discharge Enhanced Chemical Reaction: Application in Ammonia Synthesis and Hydrocarbon Gas Cleanup Texas A&M University - TxSpace Summary: ......

299

Ultrasonic analyte concentration and application in flow cytometry  

DOE Patents [OSTI]

The present invention includes an apparatus and corresponding method for concentrating analytes within a fluid flowing through a tube using acoustic radiation pressure. The apparatus includes a function generator that outputs a radio frequency electrical signal to a transducer that transforms the radio frequency electric signal to an acoustic signal and couples the acoustic signal to the tube. The acoustic signal is converted within the tube to acoustic pressure that concentrates the analytes within the fluid.

Kaduchak, Gregory; Goddard, Greg; Salzman, Gary; Sinha, Dipen; Martin, John C.; Kwiatkowski, Christopher; Graves, Steven

2014-07-22T23:59:59.000Z

300

Ultrasonic analyte concentration and application in flow cytometry  

DOE Patents [OSTI]

The present invention includes an apparatus and corresponding method for concentrating analytes within a fluid flowing through a tube using acoustic radiation pressure. The apparatus includes a function generator that outputs a radio frequency electrical signal to a transducer that transforms the radio frequency electric signal to an acoustic signal and couples the acoustic signal to the tube. The acoustic signal is converted within the tube to acoustic pressure that concentrates the analytes within the fluid.

Kaduchak, Gregory (Los Alamos, NM); Goddard, Greg (Los Alamos, NM); Salzman, Gary (White Rock, NM); Sinha, Dipen (Los Alamos, NM); Martin, John C. (Los Alamos, NM); Kwiatkowski, Christopher (Los Alamos, NM); Graves, Steven (San Juan Pueblo, NM)

2008-03-11T23:59:59.000Z

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

International Symposium on Gaseous and Odour Emissions from Animal Production Facilities, Horsens, Jutland, Denmark 1-4 June, 2003 Ammonia Emissions from Broiler Houses in Pennsylvania  

E-Print Network [OSTI]

International Symposium on Gaseous and Odour Emissions from Animal Production Facilities, Horsens, Jutland, Denmark 1-4 June, 2003 1 Ammonia Emissions from Broiler Houses in Pennsylvania During Cold of reducing ammonia (NH3) emissions are under study. Ammonia emissions during cold weather conditions from

Kentucky, University of

302

Measurement of Ammonia Emissions from Laying Hen Houses , Y. Liang2  

E-Print Network [OSTI]

Measurement of Ammonia Emissions from Laying Hen Houses H. Xin1 , Y. Liang2 , R.S. Gates3 , E. F 6802 BACKGROUND There is a pressing need for research-based data on aerial emissions (gases, odors the U.S. production conditions (National Academy of Science, 2002). The term emission contains two

Kentucky, University of

303

Rapid Ammonia Gas Transport Accounts for Futile Transmembrane Cycling under NH3/NH4  

E-Print Network [OSTI]

Rapid Ammonia Gas Transport Accounts for Futile Transmembrane Cycling under NH3/NH4 + Toxicity) seedlings is predominately of the gaseous NH3 species, rather than the NH4 + ion. Influx of 13 NH3/13 NH4 + , which exceeded 200 mmol g­1 h­1 , was not commensurate with membrane depolarization or increases in root

Britto, Dev T.

304

Remote Sensing of Ammonia and Sulfur Dioxide from On-Road Light  

E-Print Network [OSTI]

) or directly through adsorbed nitrogen and hydrogen atoms (11, 12). Ammonia emissions from tunnel studies have mea- surements than all other data combined. Sulfur compounds in gasoline combust in the engine to help facilitate the stringent 2007 diesel engine emission requirements. These reductions

Denver, University of

305

AN AMMONIA-WATER ABSORPTION-HIAT-PUMP CYCLE Donald Kuhlenschmidt, Member ASHRAE  

E-Print Network [OSTI]

,000 Btuh) input unit reported. KLY WORDS Absorption Heat-pump Air conditioning heating Ammonia Donald conditioning chillers. The authors are involved in a project to use this cycle in an air source heat pump the cycle, comment on the design differences compared to the air conditioning application and report

Oak Ridge National Laboratory

306

Study of an ammonia-based wet scrubbing process in a continuous flow system  

SciTech Connect (OSTI)

A continuous gas and liquid flow, regenerative scrubbing process for CO{sub 2} capture was demonstrated at the bench-scale level. An aqueous ammonia-based solution captures CO{sub 2} from simulated flue gas in an absorber and releases a nearly pure stream of CO{sub 2} in the regenerator. After the regeneration, the solution of ammonium compounds is recycled to the absorber. The design of a continuous flow unit was based on earlier exploratory results from a semi-batch reactor, where a CO{sub 2} and N{sub 2} simulated flue gas mixture flowed through a well-mixed batch of ammonia-based solution. During the semi-batch tests, the solution was cycled between absorption and regeneration steps to measure the carrying capacity of the solution at various initial ammonia concentrations and temperatures. Consequentially, a series of tests were conducted on the continuous unit to observe the effect of various parameters on CO{sub 2} removal efficiency and regenerator effectiveness within the flow system. The parameters that were studied included absorber temperature, regenerator temperature, initial NH{sub 3} concentration, simulated flue gas flow rate, liquid solvent inventory in the flow system, and height of the packed-bed absorber. From this testing and subsequent testing, ammonia losses from both the absorption and regeneration steps were quantified, and attempts were made to maintain steady state during operations. Implications of experimental results with respect to process design are discussed.

Mao, James X.; Lee, Anita S.; Kitchin, John R.; Nulwala, Hunaid B.; Luebke, David R.; Damodaran, Krishnan

2013-01-01T23:59:59.000Z

307

mARUS37, 207--213 (1979) Ammonia Photolysisand the Greenhouse Effect in the  

E-Print Network [OSTI]

mARUS37, 207--213 (1979) Ammonia Photolysisand the Greenhouse Effect in the Primordial Atmosphere mixing ratio of am- monia of 10-5 or greater would provide a sufficient greenhouse effect to keep of longwave radiation NH3 could pro- duce a substantial "greenhouse effect" and maintain a surface temperature

Atreya, Sushil

308

Measurement and Analysis of the Relationship between Ammonia, Acid Gases, and Fine Particles in Eastern North  

E-Print Network [OSTI]

).2­4 Gas-to-particle conversion can be accomplished by condensation, which adds mass onto preMeasurement and Analysis of the Relationship between Ammonia, Acid Gases, and Fine Particles acid gas con- centrations of 0.23 g/m3 hydrochloric acid (standard deviation [SD] 0.2 g/m3 ); 1.14 g/m3

Aneja, Viney P.

309

MEASUREMENT AND MODELLING OF AMMONIA EMISSIONS AT WASTE TREATMENT LAGOON-ATMOSPHERIC INTERFACE  

E-Print Network [OSTI]

MEASUREMENT AND MODELLING OF AMMONIA EMISSIONS AT WASTE TREATMENT LAGOON-ATMOSPHERIC INTERFACE animals ( 32 Tg N -1yr-1). Waste storage and treatment lagoons are used to treat the excreta of hogs waste storage and treatment lagoon in NC using a dynamic emission flux chamber. Results of model

Aneja, Viney P.

310

Competition for Ammonia Influences the Structure of Chemotrophic Communities in Geothermal Springs  

E-Print Network [OSTI]

Competition for Ammonia Influences the Structure of Chemotrophic Communities in Geothermal Springs of organisms capable of ni- trogen fixation in geothermal communities. These observations help to explain-to-alkaline geothermal springs. All life requires fixed sources of nitrogen (N), and its availabil- ity often limits

Ahmad, Sajjad

311

Analytical Chemistry Laboratory Progress Report for FY 1994  

SciTech Connect (OSTI)

The purpose of this report is to summarize the activities of the Analytical Chemistry Laboratory (ACL) at Argonne National Laboratory (ANL) for Fiscal Year (FY) 1994 (October 1993 through September 1994). This annual report is the eleventh for the ACL and describes continuing effort on projects, work on new projects, and contributions of the ACL staff to various programs at ANL. The Analytical Chemistry Laboratory is a full-cost-recovery service center, with the primary mission of providing a broad range of analytical chemistry support services to the scientific and engineering programs at ANL. The ACL also has a research program in analytical chemistry, conducts instrumental and methods development, and provides analytical services for governmental, educational, and industrial organizations. The ACL handles a wide range of analytical problems. Some routine or standard analyses are done, but it is common for the Argonne programs to generate unique problems that require significant development of methods and adaption of techniques to obtain useful analytical data. The ACL has four technical groups -- Chemical Analysis, Instrumental Analysis, Organic Analysis, and Environmental Analysis -- which together include about 45 technical staff members. Talents and interests of staff members cross the group lines, as do many projects within the ACL. The Chemical Analysis Group uses wet- chemical and instrumental methods for elemental, compositional, and isotopic determinations in solid, liquid, and gaseous samples and provides specialized analytical services. Major instruments in this group include an ion chromatograph (IC), an inductively coupled plasma/atomic emission spectrometer (ICP/AES), spectrophotometers, mass spectrometers (including gas-analysis and thermal-ionization mass spectrometers), emission spectrographs, autotitrators, sulfur and carbon determinators, and a kinetic phosphorescence uranium analyzer.

Green, D.W.; Boparai, A.S.; Bowers, D.L. [and others

1994-12-01T23:59:59.000Z

312

From Metaphor to Analytic Tool  

E-Print Network [OSTI]

Process Tracing From Metaphor to Analytic Tool Edited by ANDREW BENNETT and JEFFREY T. CHECKEL process tracing." Andrew Bennett is Professor of Government at Georgetown Uni versity. He is also: © VvoeVale/iStock.com series cover design: sue watson "Bennett and Checkel have assembled an im- pressive

313

Analytical Plan for Roman Glasses  

SciTech Connect (OSTI)

Roman glasses that have been in the sea or underground for about 1800 years can serve as the independent experiment that is needed for validation of codes and models that are used in performance assessment. Two sets of Roman-era glasses have been obtained for this purpose. One set comes from the sunken vessel the Iulia Felix; the second from recently excavated glasses from a Roman villa in Aquileia, Italy. The specimens contain glass artifacts and attached sediment or soil. In the case of the Iulia Felix glasses quite a lot of analytical work has been completed at the University of Padova, but from an archaeological perspective. The glasses from Aquileia have not been so carefully analyzed, but they are similar to other Roman glasses. Both glass and sediment or soil need to be analyzed and are the subject of this analytical plan. The glasses need to be analyzed with the goal of validating the model used to describe glass dissolution. The sediment and soil need to be analyzed to determine the profile of elements released from the glass. This latter need represents a significant analytical challenge because of the trace quantities that need to be analyzed. Both pieces of information will yield important information useful in the validation of the glass dissolution model and the chemical transport code(s) used to determine the migration of elements once released from the glass. In this plan, we outline the analytical techniques that should be useful in obtaining the needed information and suggest a useful starting point for this analytical effort.

Strachan, Denis M.; Buck, Edgar C.; Mueller, Karl T.; Schwantes, Jon M.; Olszta, Matthew J.; Thevuthasan, Suntharampillai; Heeren, Ronald M.

2011-01-01T23:59:59.000Z

314

An investigation of some of the effects of anhydrous ammonia on the clay minerals montmorillonite and illite  

E-Print Network [OSTI]

* For most plants, it is as good a source of nitrogen as any other ammoniacal form of nitrogen. The effects of ammonia on the soil have not been worked out as clearly as the effects of ammonia on plants. In recent years deterioration of the physical... potassium but less than illite. Stanford (25) found that K+ was fixed only if the material was dried. Sohn and Peech (24.), in a study of New York soils, found the highest amounts of ammonia were fixed by acid soils containing large amounts of organic...

Whiteley, Eli Lamar

1959-01-01T23:59:59.000Z

315

Ocean thermal plantships for production of ammonia as the hydrogen carrier.  

SciTech Connect (OSTI)

Conventional petroleum, natural gas, and coal are the primary sources of energy that have underpinned modern civilization. Their continued availability in the projected quantities required and the impacts of emission of greenhouse gases (GHGs) on the environment are issues at the forefront of world concerns. New primary sources of energy are being sought that would significantly reduce the emissions of GHGs. One such primary source that can help supply energy, water, and fertilizer without GHG emissions is available in the heretofore unexploited thermal gradients of the tropical oceans. The world's oceans are the largest natural collector and reservoir of solar energy. The potential of ocean energy is limitless for producing base-load electric power or ammonia as the hydrogen carrier and fresh water from seawater. However, until now, ocean energy has been virtually untapped. The general perception is that ocean thermal energy is limited to tropical countries. Therefore, the full potential of at-sea production of (1) ammonia as a hydrogen carrier and (2) desalinated water has not been adequately evaluated. Using ocean thermal plantships for the at-sea co-production of ammonia as a hydrogen carrier and desalinated water offer potential energy, environmental, and economic benefits that support the development of the technology. The introduction of a new widespread solution to our projected energy supply requires lead times of a decade or more. Although continuation of the ocean thermal program from the 1970s would likely have put us in a mitigating position in the early 2000s, we still have a window of opportunity to dedicate some of our conventional energy sources to the development of this renewable energy by the time new sources would be critically needed. The primary objective of this project is to evaluate the technical and economic viability of ocean thermal plantships for the production of ammonia as the hydrogen carrier. This objective is achieved by completing project tasks that consist of updating the John Hopkins University/Applied Physics Laboratory (JHU/APL) pilot plantship design and extrapolating it to commercial plantships, evaluating a new energy-efficient ammonia synthesis process, evaluating the co-production of desalinated water on plantships, and developing a conceptual design of a satellite plantships system for commercial-scale ammonia production. In addition, an industrial workshop was organized to present the results and develop future goals for commercialization of ocean thermal plantships by 2015. The following goals, arranged in chronological order, were examined at the workshop: (1) Global displacement of petroleum-fuel-based (diesel, fuel oil, naphtha) power generation for freeing up these fuels for transportation, chemical feedstock, and other high-valued uses; (2) At-sea production of desalinated water for regions of critical water shortages; (3) Displacement of carbon-based feed stocks and energy for production of ammonia fertilizers; (4) Development of hydrogen supply to allow economic processing of heavy crude oils and upgrading oil sands; (5) Development of ammonia-fueled distributed energy to displace natural-gas fueled power generation to free up natural gas for higher-value uses and the mitigation of issues associated with imported liquefied natural gas (LNG); and (6) Use of ammonia as a hydrogen carrier for transportation.

Panchal, C.B.; Pandolfini, P. P.; Kumm, W. H.; Energy Systems; Johns Hopkins Univ.; Arctic Energies, Ltd.

2009-12-02T23:59:59.000Z

316

Black Hole Collisions, Analytic Continuation, and Cosmic Censorship  

E-Print Network [OSTI]

Exact solutions of the Einstein-Maxwell equations that describe moving black holes in a cosmological setting are discussed with the aim of discovering the global structure and testing cosmic censorship. Continuation beyond the horizons present in these solutions is necessary in order to identify the global structure. Therefore the possibilities and methods of analytic extension of geometries are briefly reviewed. The global structure of the Reissner-Nordstr\\"om-de Sitter geometry is found by these methods. When several black holes are present, the exact solution is no longer everywhere analytic, but less smooth extensions satisfying the Einstein equations everywhere are possible. Some of these provide counterexamples to cosmic censorship.

Dieter R. Brill

1995-03-27T23:59:59.000Z

317

Sky coverage of orbital detectors. Analytical approach  

E-Print Network [OSTI]

Orbital detectors without pointing capability have to keep their field of view axis laying on their orbital plane, to observe the largest sky fraction. A general approach to estimate the exposure of each sky element for such detectors is a valuable tool in the R&D phase of a project, when the detector characteristics are still to be fixed. An analytical method to estimate the sky exposure is developed, which makes only few very reasonable approximations. The formulae obtained with this method are used to compute the histogram of the sky exposure of a hypothetical gamma-ray detector installed on the ISS. The C++ code used in this example is freely available on the http://cern.ch/casadei/software.html web page.

Diego Casadei

2005-12-28T23:59:59.000Z

318

Electrolysis of Humus Solutions: An Improved Method for the Estimation of Humus.  

E-Print Network [OSTI]

after electrolysis, though absent from the original solntions. Apparently the .current had produced nitric nitrogen. Nitrates mere determined colorimctrically by the phenolsulphuric acid method, a blank on the original solution being run with each... from lime and magnesia by washing with acid, with coarse and ancl placed them in a small funnel, at the bottom of which were fragments of porcelain. This was moistened with ammonia and allowed to digest for several hours. The ammonia...

Rather, J. B. (James Burness)

1911-01-01T23:59:59.000Z

319

Analyte detection using an active assay  

DOE Patents [OSTI]

Analytes using an active assay may be detected by introducing an analyte solution containing a plurality of analytes to a lacquered membrane. The lacquered membrane may be a membrane having at least one surface treated with a layer of polymers. The lacquered membrane may be semi-permeable to nonanalytes. The layer of polymers may include cross-linked polymers. A plurality of probe molecules may be arrayed and immobilized on the lacquered membrane. An external force may be applied to the analyte solution to move the analytes towards the lacquered membrane. Movement may cause some or all of the analytes to bind to the lacquered membrane. In cases where probe molecules are presented, some or all of the analytes may bind to probe molecules. The direction of the external force may be reversed to remove unbound or weakly bound analytes. Bound analytes may be detected using known detection types.

Morozov, Victor (Manassas, VA); Bailey, Charles L. (Cross Junction, VA); Evanskey, Melissa R. (Potomac Falls, VA)

2010-11-02T23:59:59.000Z

320

Operating Experience and Test Results From An Ammonia-Based Dry/Wet Cooling System For Electric Power Stations  

E-Print Network [OSTI]

tower by heat rejection to the atmosphere. The condenser/ reboiler features Union carbide's doubly enhanced heat transfer tubing to boil ammonia on the inside and to condense the steam externally. System description and performance characteristics...

Allemann, R. T.; Werry, E. V.; Fricke, H. D.; Price, R. E.; Bartz, J. A.

1982-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Refinery Waste Heat Ammonia Absorption Refrigeration Plant (WHAARP) Recovers LPG's and Gasoline, Saves Energy, and Reduces Air Pollution  

E-Print Network [OSTI]

A first-of-its-kind Waste Heat Ammonia Absorption Refrigeration Plant (WHAARP) was installed by Planetec Utility Services Co., Inc. in partnership with Energy Concepts Co. at Ultramar Diamond Shamrock's 30,000 barrel per day refinery in Denver...

Brant, B.; Brueske, S.; Erickson, D.; Papar, R.

322

Global distributions, time series and error characterization of atmospheric ammonia (NH[subscript 3]) from IASI satellite observations  

E-Print Network [OSTI]

Ammonia (NH[subscript 3]) emissions in the atmosphere have increased substantially over the past decades, largely because of intensive livestock production and use of fertilizers. As a short-lived species, NH[subscript 3] ...

Van Damme, M.

323

USDA/CSREES IFAFS GRANT PROPOSAL Reducing ammonia emissions from poultry houses by enhanced manure and diet management  

E-Print Network [OSTI]

USDA/CSREES IFAFS GRANT PROPOSAL Reducing ammonia emissions from poultry houses by enhanced manure: Iowa State University Collaborators: Terry Ashby Institution: President, Kentucky Poultry Federation: Executive Director, Iowa PoultryAssociation Federal Agency Cooperators: Bruce D. Harris Institution: US

Kentucky, University of

324

Process for treating ammonia and nitrite containing waters to prevent nitric oxide emissions therefrom  

SciTech Connect (OSTI)

This patent describes a process for controlling the emission of nitrogen dioxide from, and the amount of one or more organisms, selected from the group consisting of fungi, algae and bacteria, growing in a system for handling a flow of condensate of steam, the condensate containing ammonia, ammonia precursors, or a mixture thereof. It comprises contacting the condensate in a substantially continuous manner with an amount of an oxidizing biocide which substantially prevents the emission of nitrogen dioxide from the condensate handling system but which does not substantially inhibit the growth of the organisms in the condensate handling system; and periodically contacting the condensate with an amount of a second biocide which substantially reduces the amount of the organisms.

Gallup, D.L.; Featherstone, J.L.

1991-07-16T23:59:59.000Z

325

Analytical Chemistry Laboratory. Progress report for FY 1996  

SciTech Connect (OSTI)

The purpose of this report is to summarize the activities of the Analytical Chemistry Laboratory (ACL) at Argonne National Laboratory (ANL) for Fiscal Year (FY) 1996. This annual report is the thirteenth for the ACL. It describes effort on continuing and new projects and contributions of the ACL staff to various programs at ANL. The ACL operates in the ANL system as a full-cost-recovery service center, but has a mission that includes a complementary research and development component: The Analytical Chemistry Laboratory will provide high-quality, cost-effective chemical analysis and related technical support to solve research problems of our clients -- Argonne National Laboratory, the Department of Energy, and others -- and will conduct world-class research and development in analytical chemistry and its applications. Because of the diversity of research and development work at ANL, the ACL handles a wide range of analytical chemistry problems. Some routine or standard analyses are done, but the ACL usually works with commercial laboratories if our clients require high-volume, production-type analyses. It is common for ANL programs to generate unique problems that require significant development of methods and adaption of techniques to obtain useful analytical data. Thus, much of the support work done by the ACL is very similar to our applied analytical chemistry research.

Green, D.W.; Boparai, A.S.; Bowers, D.L.

1996-12-01T23:59:59.000Z

326

Structural carbohydrate availability with electrochemical ozonation and ammonia pressurization / depressurization pre-treatment technologies  

E-Print Network [OSTI]

biomass into available and /or soluble sugars and organic acids (i. e. uronic acid esters etc. ). The chemical linkages between hemicellulose and lignin may be affected by ammoniation pre-treatment. The significance of this fact is that heavily cross... by Turner et al (1995) demonstrated a significant increase in the available energy and crude protein of NH3 treated maize. Ammoniation of rice straw (Pradhan et al, 1997) bound residual ammonia to fiber and yielded an increase in the level of crude...

Williams, James Jason

1999-01-01T23:59:59.000Z

327

Toxicity of ammonia to larvae of the freshwater shrimp, Macrobrachium rosenbergii  

E-Print Network [OSTI]

to larval and juvenile shrimps (Armstrong et al. , 1976; Wickins, 1976) and to fish (Russo et al. , 1974", Smith and Williams, 1974", Smith and Russo' 1975; Crawford and Allen, 1977; Thurston et al. , 1978; Wedemeyer and Yasutake, 1978) and can.... Although the toxicity of ammonia to freshwater shrimp larvae has been reported by Armstrong et al. (1978), other aspects require further investigation before a reliable estimate of safe concentrations can be esta'blished. This study, which examines...

Llobrera, Jose Alvarez

1979-01-01T23:59:59.000Z

328

Reduction of nitrogen oxides with catalytic acid resistant aluminosilicate molecular sieves and ammonia  

DOE Patents [OSTI]

Noxious nitrogen oxides in a waste gas stream such as the stack gas from a fossil-fuel-fired power generation plant or other industrial plant off-gas stream is catalytically reduced to elemental nitrogen and/or innocuous nitrogen oxides employing ammonia as reductant in the presence of a zeolite catalyst in the hydrogen or sodium form having pore openings of about 3 to 10 A.

Pence, Dallas T. (Idaho Falls, ID); Thomas, Thomas R. (Idaho Falls, ID)

1980-01-01T23:59:59.000Z

329

INVESTIGATION OF AMMONIA ADSORPTION ON FLY ASH DUE TO INSTALLATION OF SELECTIVE CATALYTIC REDUCTION SYSTEMS  

SciTech Connect (OSTI)

This report summarizes an investigation of the potential impacts associated with the utilization of selective catalytic reduction (SCR) systems at coal-fired power plants. The study was sponsored by the U.S. Department of Energy Emission Control By-Products Consortium, Dominion Generation, the University of Kentucky Center for Applied Energy Research and GAI Consultants, Inc. SCR systems are effective in reducing nitrogen oxides (NOx) emissions as required by the Clean Air Act (CAA) Amendments. However, there may be potential consequences associated with ammonia contamination of stack emissions and combustion by-products from these systems. Costs for air quality, landfill and pond environmental compliance may increase significantly and the marketability of ash may be seriously reduced, which, in turn, may also lead to increased disposal costs. The potential impacts to air, surface water, groundwater, ash disposal, ash utilization, health and safety, and environmental compliance can not be easily quantified based on the information presently available. The investigation included: (1) a review of information and data available from published and unpublished sources; (2) baseline ash characterization testing of ash samples produced from several central Appalachian high-volatile bituminous coals from plants that do not currently employ SCR systems in order to characterize the ash prior to ammonia exposure; (3) an investigation of ammonia release from fly ash, including leaching and thermal studies; and (4) an evaluation of the potential impacts on plant equipment, air quality, water quality, ash disposal operations, and ash marketing.

G.F. Brendel; J.E. Bonetti; R.F. Rathbone; R.N. Frey Jr.

2000-11-01T23:59:59.000Z

330

Flue gas cleaning with ammonia reduces SO{sub 2} emission  

SciTech Connect (OSTI)

This paper describes the technical and commercial development and basis for application in North America for wet flue gas desulfurization (FGD) of the AMASOX{reg_sign} (i.e. Ammonia Absorbs Sulfur Oxides) Process of Krupp Uhde (Germany) employing ammonia reagent. This process technology has been emerging slowly and stepwise over a twenty-year period in reaching the present stage of commercial applicability. The discussion herein considers the need for accommodating to and advantageously addressing the increasing number of applications with high and ultra-high flue-gas concentrations of SO{sub 2} at the boiler outlet accompanied by significant levels of other pollutants. Key measures in accomplishing this include use of important process innovations. This, as well, calls for the effective use, when applicable, of wet electrostatic precipitator mist-elimination means to gain low/minimum-opacity stack plume trailoff in wet scrubber use together with reduction of air toxics to low concentrations. With cost-effectiveness in electric utility service, detailed herein, superior to FGD processes commonly used to date in high-sulfur service, utilization of this technology is expanding. Important, potentially trend-setting types of powerplant applications of ammonia FGD are reviewed to identify foreseen market sectors and procurement trends that will at the same time serve to substantially broaden lowest-cost coal utilization.

Emish, G.J. [Krupp Wilputte Corp., Bridgeville, PA (United States); Schulte, W. [Krupp Uhde GmbH, Dortmund (Germany); Ellison, W. [Ellison Consultants, Monrovia, MD (United States)

1997-12-31T23:59:59.000Z

331

Stress-corrosion cracking of steels in ammonia with consideration given to OTEC design: a survey  

SciTech Connect (OSTI)

Carbon steel, alloy steel, and high-strength, quenched and tempered steel, when under applied or residual stress and especially when cold formed and/or welded without subsequent thermal stress relief, are subject to failure by stress-corrosion cracking (SCC) in air-contaminated dry ammonia. Water as well as hydrazine when present in small amounts have been shown to be effective inhibitors in an all steel system. Galvanic corrosion between dissimilar metals and/or accelerated failure by SCC of stressed steel as a result of galvanic coupling may be of concern. Where water has proven effective as an inhibitor of SCC in an all steel system, it may not be adequate in a mixed metal system. With aluminum tubes, the tube sheet will either have to be solid aluminum, aluminum clad steel or some nonconductive coating will be necessary to effectively remove the cathodic alloy from the galvanic circuit. Research is required to determine the severity of the coupling effect between dissimilar alloys in ammonia under OTEC conditions; especially the possibility of accelerated SCC failures of stressed steel where the presence of an inhibitor in the ammonia may not be sufficient to override the galvanic coupling effect.

Teel, R.B.

1980-03-01T23:59:59.000Z

332

Retail refrigeration systems -- The use of ammonia and two-level secondary refrigeration  

SciTech Connect (OSTI)

The concept of a secondary refrigeration system for high-temperature use as investigated in 1991, and a design for a full high-temperature system was completed the following year. In late 1992, a supermarket chain commissioned a study of the feasibility of turning the design into a practical application and assisted the project in 1993 by commissioning a test facility for single-temperature secondary refrigeration at one of the company`s factory sites. Results and conclusions from this trial work pointed toward the need for a total secondary refrigeration system, including a low-temperature system for frozen food display cases, and the possibility of utilizing environmentally friendly ammonia as the primary refrigerant. Therefore, in late 1993/early 1994, a low-temperature system was developed and commissioned at the test facility. Full collaboration between the supermarket company and the contractor resulted in the funding of practical trial work and feasibility studies for both secondary refrigeration and a fully detailed proposal for the use of ammonia in a public retail environment. In May 1995, the first UK ammonia and two-level secondary refrigeration system began operation in a supermarket in Horsham, Sussex England.

Thomas, A.S. [Westward Refrigeration, Gloucester (United Kingdom)

1998-10-01T23:59:59.000Z

333

Developer Dashboards: The Need For Qualitative Analytics  

E-Print Network [OSTI]

Developer Dashboards: The Need For Qualitative Analytics Olga Baysal, Reid Holmes, and Michael W-to-day development tasks. I. SOFTWARE ANALYTICS IN PRACTICE Many organizations have adopted data-driven decision

Godfrey, Michael W.

334

Arguments for an Alternative Account of Analyticity  

E-Print Network [OSTI]

This dissertation presents an alternative account of analyticity, as well as arguments for that account. Although an analysis and interpretation of previous accounts of analyticity are presented, the focus is on the analysis ...

Sexton, Clark Alan

2009-11-09T23:59:59.000Z

335

Analytic study on backreacting holographic superconductors with dark matter sector  

E-Print Network [OSTI]

The variational method for Sturm-Liouville eigenvalue problem was employed to study analytically properties of the holographic superconductor with dark matter sector, in which a coupling between Maxwell field and another U(1)-gauge field was considered. The backreaction of the dark matter sector on gravitational background in question was also examined.

Lukasz Nakonieczny; Marek Rogatko

2014-11-04T23:59:59.000Z

336

Multipass optical device and process for gas and analyte determination  

DOE Patents [OSTI]

A torus multipass optical device and method are described that provide for trace level determination of gases and gas-phase analytes. The torus device includes an optical cavity defined by at least one ring mirror. The mirror delivers optical power in at least a radial and axial direction and propagates light in a multipass optical path of a predefined path length.

Bernacki, Bruce E. (Kennewick, WA)

2011-01-25T23:59:59.000Z

337

Analytical Bethe ansatz in gl(N) spin chains  

E-Print Network [OSTI]

We present a global treatment of the analytical Bethe ansatz for gl(N) spin chains admitting on each site an arbitrary representation. The method applies for closed and open spin chains, and also to the case of soliton non-preserving boundaries.

D. Arnaudon; N. Crampe; A. Doikou; L. Frappat; Eric Ragoucy

2005-10-05T23:59:59.000Z

338

Interlaboratory Analytical Comparison Study to Support Deepwater Horizon  

E-Print Network [OSTI]

oil, and in SRM 1582 Petroleum Crude Oil. The results from this second exercise are reported along with a summary of the analytical methods used. INTRODUCTION On April 20, 2010, a fatal explosion, fire assessment (NRDA) to determine what resources have been injured and what uses of the resources have been lost

339

Jorg Waldvogel, ETH Zurich 1 Computing Integrals of Analytic Functions  

E-Print Network [OSTI]

J¨org Waldvogel, ETH Z¨urich 1 Computing Integrals of Analytic Functions: A Universal Algorithm with Exponential Convergence J¨org Waldvogel, ETH Z¨urich Applied Mathematics ETH Z¨urich New Methods for Quadrature Third Scopes Meeting Z¨urich, December 9, 2006 #12;J¨org Waldvogel, ETH Z¨urich 2 The Problem

Waldvogel, Jörg

340

Simplified Synthesis of Bulk Ammonia Borane - Energy Innovation Portal  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Appendix C Analytical Chemistry Data  

Office of Legacy Management (LM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofofOxford SiteToledo SiteTonawanda North Site This page Analytical

342

Analytical Modeling | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectricEnergyCT Biomass Facility Jump to:Operations atAnaconda,ParkAnalytical

343

Energy Analytics | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address:011-DNA Jump37. It is classifiedProject)EnerVault CorporationSolaireEnergreen CoAnalytics

344

RBS' New BAIT Major: Business Analytics and  

E-Print Network [OSTI]

:623:386) ­ Analytics / decision making and planning ­ Building mathematical models of business situations ­ Also builds · 33:623:485 Time Series Modeling for Business · 33:623:400 Business Decision Analytics underRBS' New BAIT Major: Business Analytics and Information Technology "Introducing the New Business

345

Two-reagent reactions of iron clusters with ammonia and deuterium: Saturated compositions and the kinetics of reactions of deuterium with ammoniated clusters  

SciTech Connect (OSTI)

Studies of two-reagent reactions of iron clusters with ammonia and deuterium are described. The compositions of clusters saturated with both ammonia and deuterium have been determined, and indicate that the ammonia binds nondissociatively to iron clusters and to different sites than the deuterium. Rate constants for the reaction of the first deuterium molecule with ammoniated clusters have been measured. In general, low ammonia coverage (one to three molecules) has either little effect on cluster reactivity, or in the case of unreactive bare clusters, increases reactivity dramatically. Clusters saturated with ammonia show general reactivity decreases, although again the least reactive bare clusters show dramatic increases in reactivity when covered with ammonia molecules. Interesting cluster activation and deactivation effects are seen. Possible mechanisms for these reactions are discussed.

Hoffman W.F. III; Parks, E.K.; Riley, S.J.

1989-02-01T23:59:59.000Z

346

Some remarks on the radius of spatial analyticity for the Euler equations  

E-Print Network [OSTI]

We consider the Euler equations on $\\mathbb{T}^d$ with analytic data and prove lower bounds for the radius of spatial analyticity $\\epsilon(t)$ of the solution using a new method based on inductive estimates in standard Sobolev spaces. Our results are consistent with similar previous results proved by Kukavica and Vicol, but give a more precise dependence of $\\epsilon(t)$ on the radius of analyticity of the initial datum.

Marco Cappiello; Fabio Nicola

2014-04-24T23:59:59.000Z

347

Analytical effective tensor for flow-through composites  

DOE Patents [OSTI]

A machine, method and computer-usable medium for modeling an average flow of a substance through a composite material. Such a modeling includes an analytical calculation of an effective tensor K.sup.a suitable for use with a variety of media. The analytical calculation corresponds to an approximation to the tensor K, and follows by first computing the diagonal values, and then identifying symmetries of the heterogeneity distribution. Additional calculations include determining the center of mass of the heterogeneous cell and its angle according to a defined Cartesian system, and utilizing this angle into a rotation formula to compute the off-diagonal values and determining its sign.

Sviercoski, Rosangela De Fatima (Los Alamos, NM)

2012-06-19T23:59:59.000Z

348

Analytic Continuation of Harmonic Sums  

E-Print Network [OSTI]

We present a method for calculating any (nested) harmonic sum to arbitrary accuracy for all complex values of the argument. The method utilizes the relation between harmonic sums and (derivatives of) Hurwitz zeta functions, which allows a harmonic sum to be calculated as an expansion valid for large values of its argument. A program for implementing this method is also provided.

S. Albino

2009-03-06T23:59:59.000Z

349

Graph Analytics for Signature Discovery  

SciTech Connect (OSTI)

Within large amounts of seemingly unstructured data it can be diffcult to find signatures of events. In our work we transform unstructured data into a graph representation. By doing this we expose underlying structure in the data and can take advantage of existing graph analytics capabilities, as well as develop new capabilities. Currently we focus on applications in cybersecurity and communication domains. Within cybersecurity we aim to find signatures for perpetrators using the pass-the-hash attack, and in communications we look for emails or phone calls going up or down a chain of command. In both of these areas, and in many others, the signature we look for is a path with certain temporal properties. In this paper we discuss our methodology for finding these temporal paths within large graphs.

Hogan, Emilie A.; Johnson, John R.; Halappanavar, Mahantesh; Lo, Chaomei

2013-06-01T23:59:59.000Z

350

A simple analytical model to study and control azimuthal instabilities in annular combustion chambers  

E-Print Network [OSTI]

A simple analytical model to study and control azimuthal instabilities in annular combustion analytical method to compute the azimuthal modes appearing in annular combustion chambers and help analyzing exper- imental, acoustic and LES (Large Eddy Simulation) data obtained in these combustion chambers

Paris-Sud XI, Université de

351

Reaction of iron clusters with ammonia. I. Compositions of the ammoniated products and their implications for cluster structure  

SciTech Connect (OSTI)

Studies are described of the chemisorption of ammonia on isolated neutral iron clusters Fe/sub n/ for 2less than or equal tonless than or equal to165. Clusters are generated by laser vaporization in a continuous-flow-tube reactor, and reaction products are detected by laser-ionization time-of-flight mass spectrometry. Ammonia is found to chemisorb nondissociatively on cluster surfaces on the 1 ms time scale of these experiments. Measurements of ammonia uptake provide information on adsorption kinetics and on the number and nature of the binding sites. The ammonia binding energy is found to decrease with increasing cluster coverage. For chemically saturated clusters, the ratio of adsorbed NH/sub 3/ molecules to surface iron atoms is found to decrease with increasing cluster size, going from >1/3 for small clusters to <1/3 for n>100. Ammonia chemisorption is accompanied by a large decrease in cluster ionization potentials, as much as 2 eV for saturated clusters. At sufficiently high exposure the beginning of the formation of a second, physisorbed layer of molecules is seen. Detailed measurements of product composition under different exposure conditions give evidence for numerous changes in cluster structure throughout the growth sequence from small to large clusters. Often these structural changes involve particularly stable reaction products. Evidence for the existence of metastable structures is presented. Several possibilities for cluster structure are suggested.

Parks, E.K.; Nieman, G.C.; Pobo, L.G.; Riley, S.J.

1988-05-15T23:59:59.000Z

352

The nitrate to ammonia and ceramic (NAC) process -- a newly developed low-temperature technology  

SciTech Connect (OSTI)

Bench-top feasibility studies with Hanford single-shell tank (SST) simulants, using a new low-temperature (50-60C) process for converting nitrate to ammonia and ceramic (NAC), showed that between 90 and 99% of the nitrate at Hanford can be readily converted to ammonia. Aluminum powders or shot can be used to convert alkaline, nitrate-based supernate to ammonia and an alumina-silica-based ceramic solid. The process may utilize already contaminated aluminum scrap metal from various DOE sites to effect the conversion. The final nitrate-free ceramic product can be calcined, pressed, and sintered like any other ceramic. Based on starting volumes of 6.2 and 3.1 M sodium nitrate solution (probable supernate concentrations resulting from salt-cake/sludge removal from Hanford SSTs), volume reductions as high as 70% are currently obtained, compared with an expected 40 to 50% volume increase if the Hanford supernate were grouted. Engineering data indicate that the process will be very economical. Data were used to cost a batch facility with a production rate of 1200 kilograms of nitrate per hour for processing all the Hanford SST waste over 20 years. Process cost analysis indicates that between $2.01 and 2.66 will be required to convert each kilogram of nitrate. These costs are one-third to one-half of the processing costs for electrolytic and thermal processes. The ceramic waste form offers other cost savings associated with a smaller volume of waste as well as eliminates other process steps such as grouting. Silica added to the reactor, based upon the total sodium in the waste, permits us to actually bind the sodium in a nepheline phase of the final ceramic structure as well as bind most metals and nonmetals in the ceramic.

Mattus, A.J.; Lee, D.D.

1993-06-01T23:59:59.000Z

353

Selective reduction of nitric oxide with ammonia over vanadia on pillared titanium phosphate  

E-Print Network [OSTI]

in the catalyst. Shikada et al. (1981) compared AlzOz, SiOz, and SiO, ? TiOz (equimolar) supports for VzOs using a simulated flue gas containing 100 ppni SOz. The silica- titanium dioxide supported catalyst showed the highest NO conversions followed by those...SELECTIVE REDUCTION OF NITRIC OXIDE YVITH AMMONIA OVER VANADIA ON PILLARED TITANIUM PHOSPHATE A Thesis LAWRENCE JOSEPH CZARNECKI Submitted to the Graduate College of Texas AkM University in partial fulfillment of the requirement for the degree...

Czarnecki, Lawrence Joseph

1988-01-01T23:59:59.000Z

354

The selective catalytic reduction of nitric oxide with ammonia in the presence of oxygen  

E-Print Network [OSTI]

supporting the authors conclusions. Kato, et al. (1981 a) studied the catalytic activity of' iron oxide-titanium oxide catalysts with Fe/Ti atonuc ratios of 1/9 for the NO ? NHs ? Oz reaction. No NqO ivas detected in the reaction products, regardless... of the fact that an excess of oxygen ivas present in each reaction stuay. Nitric oxide and ammonia reacted stoichiometrically, regardless of the oxygen concentration, the space velocity, the temperature or the presence of SOz and HqO. The rate...

Gruber, Karen Ann

1989-01-01T23:59:59.000Z

355

Passive Ammonia SCR for Lean Burn SIDI Engines | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F SSalesOE0000652Grow Your Energy EfficiencyEnergyAmmonia SCR

356

Decomposition Pathway of Ammonia Borane on the Surface of nano-BN. | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed Newcatalyst phasesData Files Data Files 1B&W Y-12 TymesPathway of Ammonia Borane

357

OIL AND GREASE: A PROPOSED ANALYTICAL METHOD FOR  

E-Print Network [OSTI]

because a slight oil residue may carryover into the oil fraction. Blend about 100 parts of Celite (vol) PE, filter and apply suction until reasonably dry. Air dry and store in a jar. Filter paper dispersion: Blend 20 7-cm filter paper disks (Whatman 1 or 40) with distilled water in a blender for 5 - 10

358

COMPARISON OF ANALYTICAL METHODS FOR CHARACTERIZATION OF THE THERMOCHROMIC  

E-Print Network [OSTI]

, electrochromic materials, and sensors.1 Another interesting property of many conjugated polymers utilized for the characterization of the electrochromic properties of conjugated polymers.7 Investigation

Euler, William B.

359

Analytical Methods for Implementing Industrial Load Management Programs  

E-Print Network [OSTI]

Many utilities have completed long-term planning studies and have shown that a load management program is cost effective. They are now actively implementing large-scale, system-wide programs such as demand subscription, interruptable rates, and time...

Hassig, N.; Chan, M.; Carlson, R.

1982-01-01T23:59:59.000Z

360

Anglophone Historicism: From Modernist Method to Post-analytic Philosophy  

E-Print Network [OSTI]

Bevir / Journal of the Philosophy of History 3 (2009) 211Journal of the Philosophy of History 3 (2009) 211224of the Society for the Philosophy of History at the American

Bevir, Mark

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Early Test Facilities and Analytic Methods for Radiation Shielding  

SciTech Connect (OSTI)

This report represents a compilation of eight papers presented at the 1992 American Nuclear Society/European Nuclear Society International Meeting held in Chicago, Illinois on November 15 20,1992. The meeting is of special significance since it commemorates the 50th anniversary of the first controlled nuclear chain reaction, which occurred, not coincidentally, in Chicago. The papers contained in this report were presented in a special session organized by the Radiation Protection and Shielding Division in keeping with the historical theme of the meeting.

Ingersoll, D.T.

1992-01-01T23:59:59.000Z

362

Early test facilities and analytic methods for radiation shielding: Proceedings  

SciTech Connect (OSTI)

This report represents a compilation of eight papers presented at the 1992 American Nuclear Society/European Nuclear Society International Meeting. The meeting is of special significance since it commemorates the fiftieth anniversary of the first controlled nuclear chain reaction. The papers contained in this report were presented in a special session organized by the Radiation Protection and Shielding Division in keeping with the historical theme of the meeting. The paper titles are good indicators of their content and are: (1) The origin of radiation shielding research: The Oak Ridge experience, (2) Shielding research at the hanford site, (3) Aircraft shielding experiments at General Dynamics Fort Worth, 1950-1962, (4) Where have the neutrons gone , a history of the tower shielding facility, (5) History and evolution of buildup factors, (6) Early shielding research at Bettis atomic power laboratory, (7) UK reactor shielding: then and now, (8) A very personal view of the development of radiation shielding theory.

Ingersoll, D.T. (comp.) (Oak Ridge National Lab., TN (United States)); Ingersoll, J.K. (comp.) (Tec-Com, Knoxville, TN (United States))

1992-11-01T23:59:59.000Z

363

SASSI Analytical Methods Compared with SHAKE Free-Field Results  

Office of Environmental Management (EM)

presents a methodology for validating SASSI for use with a particular site profile, foundation size, and embedment depth. Two case studies are presented: 1) a deep soil site at...

364

Advancing Analytical Methods for Characterization of Anionic Carbohydrate Biopolymers  

E-Print Network [OSTI]

UV-MALDI-TOF mass spectrometry analysis of heparin oligosaccharides obtained by nitrous acid controlled degradation

Langeslay, Derek Joseph

2013-01-01T23:59:59.000Z

365

analytical laboratories method: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

observations Geosciences Websites Summary: Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA Christa D. Peters Environmental...

366

Structural reliability of brittle materials - an analytical method  

E-Print Network [OSTI]

on observed failure stress can be ex?la!ned. Pre~. ". cl (1) ?resents an example of this effect which illustrates the. mar'ked decrease in fai1ure. 'tran- th &7ith increasing test e1cment size z'hich is ob. . c;rved1. Testing of clem ni. . of varying... and Reliability of- Iic. chanlcal Systcr!s, Especially Ai craft Struct:ur es Aeronautical Syst. ems Div. , Al. SC, USA'& IIPAPB, Ohf o& (July 1961). 34 AI'!-";. I" D I X AN EX!DiPLE PPOBI, r:, &I '3'he comipuLcr programs presentecl in this paper do not...

Shields, Charles Burch

1967-01-01T23:59:59.000Z

367

Analytical instrument with apparatus and method for sample concentrating  

DOE Patents [OSTI]

A system for analysis of trace concentrations of contaminants in air includes a portable liquid chromatograph and a preconcentrator for the contaminants to be analyzed. The preconcentrator includes a sample bag having an inlet valve and an outlet valve for collecting an air sample. When the sample is collected the sample bag is connected in series with a sorbing apparatus in a recirculation loop. The sorbing apparatus has an inner gas-permeable container containing a sorbent material and an outer gas-impermeable container. The sample is circulated through the outer container and around the inner container for trapping and preconcentrating the contaminants in the sorbent material. The sorbent material may be a liquid having the same composition as the mobile phase of the chromatograph for direct injection thereinto. Alternatively, the sorbent material may be a porous, solid body, to which mobile phase liquid is added after preconcentration of the contaminants for dissolving the contaminants, the liquid solution then being withdrawn for injection into the chromatograph.

Zaromb, S.

1986-08-04T23:59:59.000Z

368

analytical production methods: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Lucas Hackl; Jan Plefka; Theodor Schuster; Peter Uwer 2012-06-11 178 Approximate life-cycle assessment of product concepts using learning systems MIT - DSpace Summary:...

369

BENCHMARKING THE INVARIANT EMBEDDING METHOD AGAINST ANALYTICAL SOLUTIONS IN  

E-Print Network [OSTI]

is demonstrated in three different areas. The first is the calculation of the energy spectrum of sputtered dependence were treated. The second application concerns the calculation of the path length distribution Calculation of the flux reflected back from a bounded region or from a half-space induced by an incoming

Pázsit, Imre

370

D-1 2003 SITE ENVIRONMENTAL REPORT Instrumentation and Analytical Methods  

E-Print Network [OSTI]

) traceable standards: americium-241 for alpha, and strontium-90 for beta. Spiked duplicates are performed-traceable standards: americium-241 for alpha and strontium-90 for beta. Tritium Analysis - Water Matrix - EPA 906

Homes, Christopher C.

371

analytical method comparisons: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the quantum decoherence CERN Preprints Summary: The dynamics of a qubit in a structured environment is investigated theoretically. One point of view of the model is the...

372

SASSI Analytical Methods Compared with SHAKE Results | Department of Energy  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power.pdf11-161-LNG |September 15,2015DepartmentDepartment ofSoft Costs » Rules

373

Hydrogen Fuel Quality - Focus: Analytical Methods Development & Hydrogen  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Groundto ApplyRoadmap HydrogenHydrogen Fuel CellFuel

374

SASSI Analytical Methods Compared with SHAKE Free-Field Results  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGY TAXBalancedDepartmentRestrictions on FederalDepartmentHowwww.srs.gov

375

Analytical Methods for Discriminating Stardust in Aerogel Capture Media  

SciTech Connect (OSTI)

Comet 81P/Wild 2's serendipitous orbit change to the inner solar system in 1974 offered researchers a rare opportunity to sample cometary material from the Kuiper belt, a repository of material left over from solar system formation {approx}4.6 Gyr ago. NASA's Stardust mission intercepted the comet in January 2004 and returned with material collected from its tail in January 2006. The cometary material, consisting of particles ranging from 10 microns down to <2 nm, was collected in aerogel, a very low density ({approx}3 mg/cm cm3) silica foam, to minimize the effects of deceleration from 6.1 km/s. The entire deceleration track is extracted from the aerogel block as a pyramidal shape known as a keystone which can be mapped using x-ray fluorescence prior to extraction of terminal or intermediate particles for other analyses. One goal of the track mapping is to determine the bulk composition of the cometary material returned. Unfortunately, although the aerogel is predominantly SiO{sub 2}, there are sufficient quantities of trace elements similar to those expected in the cometary material to require sophisticated discrimination techniques in order to decide whether a fluorescence map pixel contains only aerogel or both aerogel and cometary material. We have developed a dual threshold analysis approach for better distinguishing cometary material from aerogel contaminants and have applied it to five Stardust impact tracks and terminal particles. Here, we present aspects of the dual threshold approach and demonstrate its impact on track composition for one track.

Brennan, S; Ishii, H A; Bradley, J P; Luening, K; Ignatyev, K; Pianetta, P

2007-09-04T23:59:59.000Z

376

Analytic calculation of properties of holographic superconductors  

E-Print Network [OSTI]

We calculate analytically properties of holographic superconductors in the probe limit. We analyze the range $1/2 3/2$. We also obtain the frequency dependence of the conductivity by solving analytically the wave equation of electromagnetic perturbations. We show that the real part of the DC conductivity behaves as $e^{-\\Delta_g /T}$ and estimate the gap $\\Delta_g$ analytically. Our results are in good agreement with numerical results.

George Siopsis; Jason Therrien

2010-03-22T23:59:59.000Z

377

Method of determining the extent to which a nickel structure has been attached by a fluorine-containing gas  

DOE Patents [OSTI]

The method of determining the extent to which a nickel structure has been attacked by a halogen containing gas to which it has been exposed which comprises preparing a quantity of water substantially free from dissolved oxygen, passing ammonia gas through a cuprammonium solution to produce ammonia substantially free from oxygen, dissolving said oxygen-free ammonia in said water to produce a saturated aqueous ammonia solution free from uncombined oxygen, treating at least a portion of said nickel structure of predetermined weight with said solution to dissolve nickel compounds from the surface of said structure without dissolving an appreciable amount of said nickel and analyzing the resulting solution to determine the quantity of said nickel compounds that was associated with said said portion of said structure to determine the proportion of combined nickel in said nickel structure.

Brusie, James P. (Oak Ridge, TN)

2004-07-13T23:59:59.000Z

378

Method of Determining the Extent to which a Nickel Structure has been Attached by a Fluorine-Containing Gas  

DOE Patents [OSTI]

The method of determining the extent to which a nickel structure has been attacked by a halogen containing gas to which it has been exposed which comprises preparing a quantity of water substantially free from dissolved oxygen, passing ammonia gas through a cuprammonium solution to produce ammonia substantially free from oxygen, dissolving said oxygen-free ammonia in said water to produce a saturated aqueous ammonia solution free from uncombined oxygen, treating at least a portion of said nickel structure of predetermined weight with said solution to dissolve nickel compounds from the surface of said structure without dissolving an appreciable amount of said nickel and analyzing the resulting solution to determine the quantity of said nickel compounds that was associated with said said portion of said structure to determine the proportion of combined nickel in said nickel structure.

Brusie, James P.

2004-07-13T23:59:59.000Z

379

Strategies for Choosing Analytics and Visualization Software...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

in mind that their functions may be interchangeable. Visualization Analytics Visit Matlab Python tools: Numpy, Scipy, iPython, matplotlib Paraview Mathematica Perl IDL Python...

380

Determination of Extractives in Biomass: Laboratory Analytical...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Extractives in Biomass Laboratory Analytical Procedure (LAP) Issue Date: 7172005 A. Sluiter, R. Ruiz, C. Scarlata, J. Sluiter, and D. Templeton Technical Report NRELTP-510-42619...

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Summative Mass Closure: Laboratory Analytical Procedure (LAP...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Prepared under Task No. BB072230 NREL Laboratory Analytical Procedures for standard biomass analysis are available electronically at http:www.nrel.govbiomass...

382

Contained radiological analytical chemistry module  

DOE Patents [OSTI]

A system which provides analytical determination of a plurality of water chemistry parameters with respect to water samples subject to radiological contamination. The system includes a water sample analyzer disposed within a containment and comprising a sampling section for providing predetermined volumes of samples for analysis; a flow control section for controlling the flow through the system; and a gas analysis section for analyzing samples provided by the sampling system. The sampling section includes a controllable multiple port valve for, in one position, metering out sample of a predetermined volume and for, in a second position, delivering the material sample for analysis. The flow control section includes a regulator valve for reducing the pressure in a portion of the system to provide a low pressure region, and measurement devices located in the low pressure region for measuring sample parameters such as pH and conductivity, at low pressure. The gas analysis section which is of independent utility provides for isolating a small water sample and extracting the dissolved gases therefrom into a small expansion volume wherein the gas pressure and thermoconductivity of the extracted gas are measured.

Barney, David M. (Scotia, NY)

1989-01-01T23:59:59.000Z

383

Contained radiological analytical chemistry module  

DOE Patents [OSTI]

A system which provides analytical determination of a plurality of water chemistry parameters with respect to water samples subject to radiological contamination. The system includes a water sample analyzer disposed within a containment and comprising a sampling section for providing predetermined volumes of samples for analysis; a flow control section for controlling the flow through the system; and a gas analysis section for analyzing samples provided by the sampling system. The sampling section includes a controllable multiple port valve for, in one position, metering out sample of a predetermined volume and for, in a second position, delivering the material sample for analysis. The flow control section includes a regulator valve for reducing the pressure in a portion of the system to provide a low pressure region, and measurement devices located in the low pressure region for measuring sample parameters such as pH and conductivity, at low pressure. The gas analysis section which is of independent utility provides for isolating a small water sample and extracting the dissolved gases therefrom into a small expansion volume wherein the gas pressure and thermoconductivity of the extracted gas are measured.

Barney, David M. (Scotia, NY)

1990-01-01T23:59:59.000Z

384

Reactions of cobalt clusters with water and ammonia: Implications for cluster structure  

SciTech Connect (OSTI)

Reactions of cobalt clusters in the 6 to 150 atom size range with water and ammonia are used to probe cluster geometrical structure. Clusters saturated with ammonia are found in several isomeric forms in much of this size region, including a structure based on icosahedral packing for clusters having 50 to 120 atoms. The variations with cluster size of the binding energy for a single water molecule provide evidence for icosahedral structure of the bare cobalt clusters in the same size range seen for the ammoniated clusters. However, both probes suggest that in many cases the bare clusters also have multiple isomers. The evidence for icosahedral structure in the bare and ammoniated clusters disappears above [similar to]120 atoms and is clearly not seen at the third icosahedral shell closing at 147 atoms. Comparison with earlier studies of hydrogenated cobalt clusters and with bare and hydrogenated nickel clusters is made. Reasons for the failure to form the closed-shell 147 atom icosahedral cluster are discussed.

Parks, E.K.; Klots, T.D.; Winter, B.J.; Riley, S.J. (Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States))

1993-10-15T23:59:59.000Z

385

Laser separation of nitrogen isotopes by the IR+UV dissociation of ammonia molecules  

SciTech Connect (OSTI)

The separation of nitrogen isotopes is studied upon successive single-photon IR excitation and UV dissociation of ammonia molecules. The excitation selectivity was provided by tuning a CO{sub 2} laser to resonance with {sup 14}NH{sub 3} molecules [the 9R(30) laser line] or with {sup 15}NH{sub 3} molecules [the 9R(10) laser line]. Isotopic mixtures containing 4.8% and 0.37% (natural content) of the {sup 15}NH isotope were investigated. The dependences of the selectivity and the dissociation yield for each isotopic component on the buffer gas pressure (N{sub 2}, O{sub 2}, Ar) and the ammonia pressure were obtained. In the limit of low NH{sub 3} pressures (0.5-2 Torr), the dissociation selectivity {alpha}(15/14) for {sup 15}N was 17. The selectivity mechanism of the IR+UV dissociation is discussed and the outlook is considered for the development of the nitrogen isotope separation process based on this approach. (laser isotope separation)

Apatin, V M; Klimin, S A; Laptev, V B; Lokhman, V N; Ogurok, D D; Pigul'skii, S V; Ryabov, E A [Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow region (Russian Federation)

2008-08-31T23:59:59.000Z

386

Ammonia Generation over TWC for Passive SCR NOX Control for Lean Gasoline Engines  

SciTech Connect (OSTI)

A commercial three-way catalyst (TWC) was evaluated for ammonia (NH3) generation on a 2.0-liter BMW lean burn gasoline direct injection engine as a component in a passive ammonia selective catalytic reduction (SCR) system. The passive NH3 SCR system is a potential low cost approach for controlling nitrogen oxides (NOX) emissions from lean burn gasoline engines. In this system, NH3 is generated over a close-coupled TWC during periodic slightly rich engine operation and subsequently stored on an underfloor SCR catalyst. Upon switching to lean, NOX passes through the TWC and is reduced by the stored NH3 on the SCR catalyst. NH3 generation was evaluated at different air-fuel equivalence ratios at multiple engine speed and load conditions. Near complete conversion of NOX to NH3 was achieved at =0.96 for nearly all conditions studied. At the =0.96 condition, HC emissions were relatively minimal, but CO emissions were significant. Operation at AFRs richer than =0.96 did not provide more NH3 yield and led to higher HC and CO emissions. Results of the reductant conversion and consumption processes were used to calculate a representative fuel consumption of the engine operating with an ideal passive SCR system. The results show a 1-7% fuel economy benefit at various steady-state engine speed and load points relative to a stoichiometric engine operation.

Prikhodko, Vitaly Y [ORNL] [ORNL; Parks, II, James E [ORNL; Pihl, Josh A [ORNL] [ORNL; Toops, Todd J [ORNL] [ORNL

2014-01-01T23:59:59.000Z

387

Investigation of ammonia equipment configurations for supermarket refrigeration applications (for microcomputers). Software  

SciTech Connect (OSTI)

This product gives results of a project to quantify the advantages and disadvantages of using ammonia with a secondary brine refrigerant compared to R-22 in supermarket refrigeration applications. Project objectives were achieved by numerical experiments using simulations. Mechanistic models of refrigeration system components were used, based on fundamental principles, accepted heat transfer/pressure drop correlations, and available manufacturers` data. Available thermodynamic and transport property data correlations for ammonia and R-22 were used in the models. The parameters of these models were varied to determine their effect on system performance and locate optimum values. A modular approach was used in which each component was separately modeled, allowing simple changes in system configurations. The combined component models resulted in a large set of coupled nonlinear algebraic equations for the quasi-steady systems that did not involve brine storage. The system involved differential and algebraic equations. These equations were solved using the general-purpose simulation programs EES and TRNSYS. EES is a robust nonlinear equation-solving program with built-in thermophysical property data. TRNSYS is a sequential modular simulation program that uses schemes to solve coupled algebraic and differential equations.

NONE

1995-02-01T23:59:59.000Z

388

International Symposium on Gaseous and Odour Emissions from Animal Production Facilities, Horsens, Jutland, Denmark 1-4 June, 2003 Ammonia Emissions from Broiler Houses in Kentucky during Winter  

E-Print Network [OSTI]

International Symposium on Gaseous and Odour Emissions from Animal Production Facilities, Horsens, Jutland, Denmark 1-4 June, 2003 Ammonia Emissions from Broiler Houses in Kentucky during Winter Kenneth D a comprehensive database of ammonia emission rates (ER) from US poultry facilities. The influence of common

Kentucky, University of

389

International Symposium on Gaseous and Odour Emissions from Animal Production Facilities, Horsens, Jutland, Denmark 1-4 June, 2003 AMMONIA EMISSIONS FROM LAYER HOUSES IN IOWA  

E-Print Network [OSTI]

International Symposium on Gaseous and Odour Emissions from Animal Production Facilities, Horsens, Jutland, Denmark 1-4 June, 2003 1 AMMONIA EMISSIONS FROM LAYER HOUSES IN IOWA Y. Liang1 , H. Xin2 , A. Casey10 ABSTRACT An ongoing project of monitoring ammonia (NH3) emissions from U.S. layer houses

Kentucky, University of

390

Effect of particle size on rate and extent of degradation of alfalfa hay, barley straw and ammonia-treated barley straw  

E-Print Network [OSTI]

Effect of particle size on rate and extent of degradation of alfalfa hay, barley straw and ammonia experiment alfalfa hay (A, 57.4 % DOM), barley straw (S, 40.2 % DOM) and ammonia-treated barley straw (TS, 51 characteristics were also studied for alfalfa hay. Average dry matter (DM) intakes were 74.5, 29.2 and 45.9 g

Paris-Sud XI, Université de

391

Infrared Hole Burning and Conformational Change in a Borane-Ammonia Complex Christopher A. Endicott, Herbert L. Strauss,* Chambers C. Hughes, and Dirk Trauner  

E-Print Network [OSTI]

Infrared Hole Burning and Conformational Change in a Borane-Ammonia Complex Christopher A. Endicott-D stretching region in the infrared spectrum of the ammonia complex of tris-(2-methoxymethyl- phenol has a unique structure, and to investigate the nature of the hydrogen bonding, we carried out infrared

Trauner, Dirk

392

Study of the effects of interleakage of ammonia and seawater on corrosion and scaling of candidate materials for OTEC heat exchngers. Final report  

SciTech Connect (OSTI)

Assessment has been made on the effect of small concentrations of ammonia in seawater and varying concentrations of seawater in anhydrous ammonia upon corrosion and scaling of candidate OTEC heat exchanger materials - A1-5052, Alclad 3003, copper alloys 706, 715 and 722, AL-6X stainless steel and CP titanium. Results are presented. AL-6X stainless steel and CP titanium showed exceptional corrosion resistance to all test environments. Alclad alloy 3003 showed satisfactory performance in seawater and seawater plus ammonia environments. Only minimal pitting was observed and this was limited to the sacrificial cladding in seawater plus ammonia only. Cladding alloy 7072 showed unacceptable corrosion resistance in anhydrous ammonia containing low seawater concentrations. Al-5052 tubes showed unsatisfactory corrosion behavior in the presence of seawater flow with ammonia interleakage. Copper alloys considered showed unacceptable corrosion resistance in all seawater environments containing ammonia. Low pressure differentials between seawater and anhydrous ammonia in the tube testing unit resulted in scaling and moderately efficient plug seal formation at the artificial leak sites of the tubes. It is recommended that Alclad 3003, CP titanium and AL-6X stainless steel tubes be assessed for suitability in the presence of probable OTEC cleaning systems.

Grimes, W D; Schrieber, C F; Manning, J A

1980-07-01T23:59:59.000Z

393

Proceedings of the Midwest Poultry Federation Convention, St. Paul, MN. March 16-18, 2004 Ammonia Emission from Iowa Layer Houses  

E-Print Network [OSTI]

conversion as one of eight principles to reduce ammonia emission from layer hen houses. Research on reduction., Pittsburg, PA) for NH3 measurement and infrared sensor (0-5000 ± 20 ppm; Vaisala, Inc., Woburn, MA) for CO2 - Ammonia Emission from Iowa Layer Houses H. Xin1 , Y. Liang2 , R.S. Gates3 , E. F. Wheeler4 1 Professor

Kentucky, University of

394

Resonance ionization for analytical spectroscopy  

DOE Patents [OSTI]

This invention relates to a method for the sensitive and selective analysis of an atomic or molecular component of a gas. According to this method, the desired neutral component is ionized by one or more resonance photon absorptions, and the resultant ions are measured in a sensitive counter. Numerous energy pathways are described for accomplishing the ionization including the use of one or two tunable pulsed dye lasers.

Hurst, George S. (Oak Ridge, TN); Payne, Marvin G. (Harriman, TN); Wagner, Edward B. (Burchfield Heights, TN)

1976-01-01T23:59:59.000Z

395

Comparison of Numerical and Analytical Solutions of Heat Equation in R1n  

E-Print Network [OSTI]

Example Analytical Calculation of Heat Equation in 1-D 4 4 2-D Matrix Methods for Numerical Approximations Bibliography 11 8 Appendices 11 8.1 Graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8.2 Matlab Code

Marzuola, Jeremy

396

Ocean thermal energy conversion plants : experimental and analytical study of mixing and recirculation  

E-Print Network [OSTI]

Ocean thermal energy conversion (OTEC) is a method of generating power using the vertical temperature gradient of the tropical ocean as an energy source. Experimental and analytical studies have been carried out to determine ...

Jirka, Gerhard H.

397

Silicate electrochemical measurements in seawater: Chemical and analytical aspects towards a reagentless sensor  

E-Print Network [OSTI]

Silicate electrochemical measurements in seawater: Chemical and analytical aspects towards Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex, France Keywords: Molybdenum Silicate Reagentless developed a semi-autonomous method to detect silicate in aqueous samples. Molybdenum oxidation was used

Mailhes, Corinne

398

Microfabricated field calibration assembly for analytical instruments  

DOE Patents [OSTI]

A microfabricated field calibration assembly for use in calibrating analytical instruments and sensor systems. The assembly comprises a circuit board comprising one or more resistively heatable microbridge elements, an interface device that enables addressable heating of the microbridge elements, and, in some embodiments, a means for positioning the circuit board within an inlet structure of an analytical instrument or sensor system.

Robinson, Alex L. (Albuquerque, NM); Manginell, Ronald P. (Albuquerque, NM); Moorman, Matthew W. (Albuquerque, NM); Rodacy, Philip J. (Albuquerque, NM); Simonson, Robert J. (Cedar Crest, NM)

2011-03-29T23:59:59.000Z

399

Analytical Chemistry Division's sample transaction system  

SciTech Connect (OSTI)

The Analytical Chemistry Division uses the DECsystem-10 computer for a wide range of tasks: sample management, timekeeping, quality assurance, and data calculation. This document describes the features and operating characteristics of many of the computer programs used by the Division. The descriptions are divided into chapters which cover all of the information about one aspect of the Analytical Chemistry Division's computer processing.

Stanton, J.S.; Tilson, P.A.

1980-10-01T23:59:59.000Z

400

Analytical Alias Resolution Mehmet Hadi Gunes and Kamil Sarac  

E-Print Network [OSTI]

that · includes artificial links/nodes · misses existing links/nodes Alias Resolution: Problem IPA2 IPA3 IPA4 IPA5IPA6 IPA1 #12;Analytical Alias Resolution 5/13 Address Based Method (Mercator and iffinder) [J.Pansiot98] · Send probe packets to different IP addresses (i.e. IPA and IPB) · If replies from have the same

Gunes, Mehmet Hadi

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Analytical energy spectrum for hybrid mechanical systems  

E-Print Network [OSTI]

We investigate the energy spectrum for hybrid mechanical systems described by non-parity-symmetric quantum Rabi models. A set of analytical solutions in terms of the confluent Heun functions and their analytical energy spectrum are obtained. The analytical energy spectrum includes regular and exceptional parts, which are both confirmed by direct numerical simulation. The regular part is determined by the zeros of the Wronskian for a pair of analytical solutions. The exceptional part is relevant to the isolated exact solutions and its energy eigenvalues are obtained by analyzing the truncation conditions for the confluent Heun functions. By analyzing the energy eigenvalues for exceptional points, we obtain the analytical conditions for the energy-level-crossings, which correspond to two-fold energy degeneracy.

Honghua Zhong; Qiongtao Xie; Xiwen Guan; Murray T. Batchelor; Kelin Gao; Chaohong Lee

2013-11-07T23:59:59.000Z

402

Composition and method to remove asbestos  

DOE Patents [OSTI]

A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed. The composition comprises water, at least about 30% by weight of an inorganic acid, and from about 0.1 to about 4% by weight of a tetrafluoroborate of ammonia, an alkali metal or an alkaline earth metal. A method of transforming the asbestos-containing material into a non-asbestos material using the present composition also is disclosed.

Block, J.

1998-05-19T23:59:59.000Z

403

Composition and method to remove asbestos  

DOE Patents [OSTI]

A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed. The composition comprises water, at least about 30% by weight of an inorganic acid, and from about 0.1 to about 4% by weight of a hexafluorosilicate of ammonia, an alkali metal or an alkaline earth metal. A method of transforming the asbestos-containing material into a non-asbestos material using the present composition also is disclosed.

Block, J.

1998-05-19T23:59:59.000Z

404

Adomian Decomposition Method for Quark Gluon Plasma Model  

SciTech Connect (OSTI)

The paper investigates the possibility of obtaining analytical solutions for the Quark Gluon Plasma model using the Adomian decomposition method.

Constantinescu, Radu; Ionescu, Carmen; Stoicescu, Mihai [Dept. of Theoretical Physics, University of Craiova, 13 Al. I. Cuza Str., Craiova, 200 585e (Romania)

2011-10-03T23:59:59.000Z

405

Waste minimization in analytical chemistry through innovative sample preparation techniques.  

SciTech Connect (OSTI)

Because toxic solvents and other hazardous materials are commonly used in analytical methods, characterization procedures result in significant and costly amount of waste. We are developing alternative analytical methods in the radiological and organic areas to reduce the volume or form of the hazardous waste produced during sample analysis. For the radiological area, we have examined high-pressure, closed-vessel microwave digestion as a way to minimize waste from sample preparation operations. Heated solutions of strong mineral acids can be avoided for sample digestion by using the microwave approach. Because reactivity increases with pressure, we examined the use of less hazardous solvents to leach selected contaminants from soil for subsequent analysis. We demonstrated the feasibility of this approach by extracting plutonium from a NET reference material using citric and tartaric acids with microwave digestion. Analytical results were comparable to traditional digestion methods, while hazardous waste was reduced by a factor often. We also evaluated the suitability of other natural acids, determined the extraction performance on a wider variety of soil types, and examined the extraction efficiency of other contaminants. For the organic area, we examined ways to minimize the wastes associated with the determination of polychlorinated biphenyls (PCBs) in environmental samples. Conventional methods for analyzing semivolatile organic compounds are labor intensive and require copious amounts of hazardous solvents. For soil and sediment samples, we have a method to analyze PCBs that is based on microscale extraction using benign solvents (e.g., water or hexane). The extraction is performed at elevated temperatures in stainless steel cells containing the sample and solvent. Gas chromatography-mass spectrometry (GC/MS) was used to quantitate the analytes in the isolated extract. More recently, we developed a method utilizing solid-phase microextraction (SPME) for natural water samples. In this SPME technique, a fused-silica fiber coated with a polymeric film is exposed to the sample, extraction is allowed to take place, and then the analytes are thermally desorbed for GC analysis. Unlike liquid-liquid extraction or solid-phase extraction, SPME consumes all of the extracted sample in the analysis, significantly reducing the required sample volume.

Smith, L. L.

1998-05-28T23:59:59.000Z

406

ARPEFS as an analytic technique  

SciTech Connect (OSTI)

Two modifications to the ARPEFS technique are introduced. These are studied using p(2 {times} 2)S/Cu(001) as a model system. The first modification is the obtaining of ARPEFS {chi}(k) curves at temperatures as low as our equipment will permit. While adding to the difficulty of the experiment, this modification is shown to almost double the signal-to-noise ratio of normal emission p(2 {times} 2)S/Cu(001) {chi}(k) curves. This is shown by visual comparison of the raw data and by the improved precision of the extracted structural parameters. The second change is the replacement of manual fitting of the Fourier filtered {chi}(k) curves by the use of the simplex algorithm for parameter determination. Again using p(2 {times} 2)S/Cu(001) data, this is shown to result in better agreement between experimental {chi}(k) curves and curves calculated based on model structures. The improved ARPEFS is then applied to p(2 {times} 2)S/Ni(111) and ({radical}3 {times} {radical}3) R30{degree}S/Ni(111). For p(2 {times} 2)S/Cu(001) we find a S-Cu bond length of 2.26 {Angstrom}, with the S adatom 1.31 {Angstrom} above the fourfold hollow site. The second Cu layer appears to be corrugated. Analysis of the p(2 {times} 2)S/Ni(111) data indicates that the S adatom adatom adsorbs onto the FCC threefold hollow site 1.53 {Angstrom} above the Ni surface. The S-Ni bond length is determined to be 2.13 {Angstrom}, indicating an outwards shift of the first layer Ni atoms. We are unable to assign a unique structure to ({radical}3 {times} {radical}3)R30{degree}S/Ni(111). An analysis of the strengths and weaknesses of ARPEFS as an experimental and analytic technique is presented, along with a summary of problems still to be addressed.

Schach von Wittenau, A.E.

1991-04-01T23:59:59.000Z

407

S urface chemistry of a viscose-based activated carbon cloth modified by treatment with ammonia and steam  

E-Print Network [OSTI]

-based activated carbon fibers (ACF) to optimize the oxidative retention of up to 5000 ppmv of SO2 in moist air suitable for the recovery of sulfuric acid at room temperature than granular activated carbon becauseS urface chemistry of a viscose-based activated carbon cloth modified by treatment with ammonia

Paris-Sud XI, Université de

408

The conserved carboxy-terminal region of the ammonia channel AmtB plays a critical role in channel function  

E-Print Network [OSTI]

The conserved carboxy-terminal region of the ammonia channel AmtB plays a critical role in channel-terminal residues can have very marked effects. Using the Escherichia coli AmtB protein as a model system for Amt that are best explained in terms of two distinct effects of the C-terminal region on AmtB activity. Residues

Merrick, Mike

409

National Poultry Waste Management Symposium, Birmingham AL 28-30 October, 2002 AMMONIA LOSSES, EVALUATIONS AND SOLUTIONS FOR  

E-Print Network [OSTI]

National Poultry Waste Management Symposium, Birmingham AL 28-30 October, 2002 AMMONIA LOSSES, EVALUATIONS AND SOLUTIONS FOR POULTRY SYSTEMS Richard S. Gates1 , Hongwei Xin2 and Eileen Wheeler3 1 Professor.S. production conditions is a pressing air quality issue that is facing the U.S. livestock and poultry industry

Kentucky, University of

410

General basic and coordination catalysis in reactions of haloaromatic compounds with ammonia in the presence of copper(I) compounds  

SciTech Connect (OSTI)

This paper presents a study made to detect general basic catalysis by ammonia (reagent) in reactions of ammonolysis of haloaromatic compounds in the presence of Cu/sup +/ ions, as well as to determine the generality of the mechanisms of the catalytic replacement of a halogen atom by an amino group in the anthraquinone and benzene series.

Chumak, V.T.; Shein, S.M.

1985-11-01T23:59:59.000Z

411

Analytical Estimation of CO2 Storage Capacity in Depleted Oil and Gas Reservoirs Based on Thermodynamic State Functions  

E-Print Network [OSTI]

Numerical simulation has been used, as common practice, to estimate the CO2 storage capacity of depleted reservoirs. However, this method is time consuming, expensive and requires detailed input data. This investigation proposes an analytical method...

Valbuena Olivares, Ernesto

2012-02-14T23:59:59.000Z

412

Robust Accurate Non-Invasive Analyte Monitor  

DOE Patents [OSTI]

An improved method and apparatus for determining noninvasively and in vivo one or more unknown values of a known characteristic, particularly the concentration of an analyte in human tissue. The method includes: (1) irradiating the tissue with infrared energy (400 nm-2400 nm) having at least several wavelengths in a given range of wavelengths so that there is differential absorption of at least some of the wavelengths by the tissue as a function of the wavelengths and the known characteristic, the differential absorption causeing intensity variations of the wavelengths incident from the tissue; (2) providing a first path through the tissue; (3) optimizing the first path for a first sub-region of the range of wavelengths to maximize the differential absorption by at least some of the wavelengths in the first sub-region; (4) providing a second path through the tissue; and (5) optimizing the second path for a second sub-region of the range, to maximize the differential absorption by at least some of the wavelengths in the second sub-region. In the preferred embodiment a third path through the tissue is provided for, which path is optimized for a third sub-region of the range. With this arrangement, spectral variations which are the result of tissue differences (e.g., melanin and temperature) can be reduced. At least one of the paths represents a partial transmission path through the tissue. This partial transmission path may pass through the nail of a finger once and, preferably, twice. Also included are apparatus for: (1) reducing the arterial pulsations within the tissue; and (2) maximizing the blood content i the tissue.

Robinson, Mark R. (1603 Solano NE., Albuquerque, NM 87110)

1998-11-03T23:59:59.000Z

413

Calculations on spin-paired species in metal-ammonia solutions  

SciTech Connect (OSTI)

In this paper we show that the spin-paired species in ammonia is consistent with a cluster of two single-electron ammoniated cavity species held together by a cation, also probably solvated. With the electronic part of the wave functions for the ammoniated electron as determined by Newton, the ground-state electronic configuration is a singlet and the singlet-triplet separation is calculated to be about 0.1 eV. The spectrum of the individual cavity species is only shifted by a few hundredths of an electronvolt based on perturbation calculations. These data are consistent with the experimental values recently found by Schindewolf and Werner, who have other data which support the particular species studied in this paper.

Kestner, N.R.; Rao, B.K.; Finley, C.W.

1983-04-14T23:59:59.000Z

414

Solvated electron yields in liquid and supercritical ammonia-A statistical mechanical treatment  

SciTech Connect (OSTI)

Earlier the geminate recombination of ions and solvated electrons, produced by ionizing radiation or laser light, was theoretically treated by a model which consisted of a Rydberg atom interacting with the thermodynamic fluctuations of the medium [R. Schiller, J. Chem. Phys. 92, 5527 (1990)]. The theory was applied to liquid-to-supercritical water [R. Schiller and A. Horvath, J. Chem. Phys. 135, 084510 (2011)]. Now it is compared with recent experiments performed on liquid-to-supercritical ammonia [J. Urbanek, A. Dahmen, J. Torres-Alacan, P. Koenigshoven, J. Lindner, and P. Voehringer, J. Phys. Chem. B 116, 2223 (2012)]. The agreement between theory and experiment seems to be reasonable. The treatment is critically assessed.

Schiller, Robert; Horvath, Akos [Centre for Energy Research, P.O.B. 49, Budapest H-1525 (Hungary)

2012-12-07T23:59:59.000Z

415

Thermal Stability and Hydrogen Release Kinetics of Ammonia Borane Under Vehicle Storage Conditions  

SciTech Connect (OSTI)

Ammonia borane (AB) is a promising chemical hydrogen storage material for H2 powered fuel-cell vehicles (FCVs) owing to its considerable hydrogen density and stability under typical ambient conditions. U.S. Department of Energy (DOE) Technical Targets for on-board hydrogen storage systems in 2015 provide a requirement for operating temperatures in full-sun exposure as high as 60C (50C by 2010) [1]. The purpose of this work is to investigate the thermal stability of solid AB during storage on-board a FCV at 40 to 60C. Calorimeter measurements and calculation models are used to estimate AB thermal stability and H2 release kinetics under isothermal, adiabatic, and cooled storage conditions as a function of storage time, temperature, and AB purity.

Rassat, Scot D.; Smith, R. Scott; Aardahl, Christopher L.; Autrey, Thomas; Chin, Arthur A.; Magee, Joseph W.; VanSciver, Gary R.; Lipiecki, Frank J.

2006-09-01T23:59:59.000Z

416

Evaluation of a solar intermittent refrigeration system for ice production operating with ammonia/lithium nitrate  

SciTech Connect (OSTI)

A novel solar intermittent refrigeration system for ice production developed in the Centro de Investigacion en Energia of the Universidad Nacional Autonoma de Mexico is presented. The system operates with the ammonia/lithium nitrate mixture. The system developed has a nominal capacity of 8 kg of ice/day. It consists of a cylindrical parabolic collector acting as generator-absorber. Evaporator temperatures as low as -11 C were obtained for several hours with solar coefficients of performance up to 0.08. It was found that the coefficient of performance increases with the increment of solar radiation and the solution concentration. A dependency of the coefficient of performance was not founded against the cooling water temperature. Also it was found that the maximum operating pressure increases meanwhile the generation temperature decreases with an increase of the solution concentration. (author)

Rivera, W.; Moreno-Quintanar, G.; Best, R. [Centro de Investigacion en Energia, Universidad Nacional Autonoma de Mexico, A.P. 34, 62580 Temixco, Mor. (Mexico); Rivera, C.O.; Martinez, F. [Facultad de Ingenieria Campus Coatzacoalcos, Universidad Veracruzana, Av. Universidad Km 7.5, 96530 Coatzacoalcos, Ver. (Mexico)

2011-01-15T23:59:59.000Z

417

An interpretation of the vibrational and rotational structure of the 2167A? system of ammonia  

E-Print Network [OSTI]

AN INTERPRETATION OF THE VIBRATIONAL AND ROTATIONAL STRUCTURE OF THE 2 l67A ? SYSTEM OF AMMONIA A D isserta tion By Bobby Lee Landrum Submitted to the Graduate S choo l o f the A g r icu ltu ra l and M echan ica l C o llege o f Texas... in p a rtia l fu lfillm en t o f the requ irem en ts fo r the d egree o f DOCTOR OF PHILOSOPHY January 1959 M ajor Subject: P h ys ics This r e s e a r ch was supported by the United States A ir F o r c e through the A ir F o r c e O ffic e...

Landrum, Bobby Lee

1959-01-01T23:59:59.000Z

418

Remediation of Uranium in the Hanford Vadose Zone Using Ammonia Gas: FY 2010 Laboratory-Scale Experiments  

SciTech Connect (OSTI)

This investigation is focused on refining an in situ technology for vadose zone remediation of uranium by the addition of ammonia (NH3) gas. Objectives are to: a) refine the technique of ammonia gas treatment of low water content sediments to minimize uranium mobility by changing uranium surface phases (or coat surface phases), b) identify the geochemical changes in uranium surface phases during ammonia gas treatment, c) identify broader geochemical changes that occur in sediment during ammonia gas treatment, and d) predict and test injection of ammonia gas for intermediate-scale systems to identify process interactions that occur at a larger scale and could impact field scale implementation.Overall, NH3 gas treatment of low-water content sediments appears quite effective at decreasing aqueous, adsorbed uranium concentrations. The NH3 gas treatment is also fairly effective for decreasing the mobility of U-carbonate coprecipitates, but shows mixed success for U present in Na-boltwoodite. There are some changes in U-carbonate surface phases that were identified by surface phase analysis, but no changes observed for Na-boltwoodite. It is likely that dissolution of sediment minerals (predominantly montmorillonite, muscovite, kaolinite) under the alkaline conditions created and subsequent precipitation as the pH returns to natural conditions coat some of the uranium surface phases, although a greater understanding of these processes is needed to predict the long term impact on uranium mobility. Injection of NH3 gas into sediments at low water content (1% to 16% water content) can effectively treat a large area without water addition, so there is little uranium mobilization (i.e., transport over cm or larger scale) during the injection phase.

Szecsody, James E.; Truex, Michael J.; Zhong, Lirong; Qafoku, Nikolla; Williams, Mark D.; McKinley, James P.; Wang, Zheming; Bargar, John; Faurie, Danielle K.; Resch, Charles T.; Phillips, Jerry L.

2010-12-01T23:59:59.000Z

419

Deep Sludge Gas Release Event Analytical Evaluation  

SciTech Connect (OSTI)

Long Abstract. Full Text. The purpose of the Deep Sludge Gas Release Event Analytical Evaluation (DSGRE-AE) is to evaluate the postulated hypothesis that a hydrogen GRE may occur in Hanford tanks containing waste sludges at levels greater than previously experienced. There is a need to understand gas retention and release hazards in sludge beds which are 200 -300 inches deep. These sludge beds are deeper than historical Hanford sludge waste beds, and are created when waste is retrieved from older single-shell tanks (SST) and transferred to newer double-shell tanks (DST).Retrieval of waste from SSTs reduces the risk to the environment from leakage or potential leakage of waste into the ground from these tanks. However, the possibility of an energetic event (flammable gas accident) in the retrieval receiver DST is worse than slow leakage. Lines of inquiry, therefore, are (1) can sludge waste be stored safely in deep beds; (2) can gas release events (GRE) be prevented by periodically degassing the sludge (e.g., mixer pump); or (3) does the retrieval strategy need to be altered to limit sludge bed height by retrieving into additional DSTs? The scope of this effort is to provide expert advice on whether or not to move forward with the generation of deep beds of sludge through retrieval of C-Farm tanks. Evaluation of possible mitigation methods (e.g., using mixer pumps to release gas, retrieving into an additional DST) are being evaluated by a second team and are not discussed in this report. While available data and engineering judgment indicate that increased gas retention (retained gas fraction) in DST sludge at depths resulting from the completion of SST 241-C Tank Farm retrievals is not expected and, even if gas releases were to occur, they would be small and local, a positive USQ was declared (Occurrence Report EM-RP--WRPS-TANKFARM-2012-0014, "Potential Exists for a Large Spontaneous Gas Release Event in Deep Settled Waste Sludge"). The purpose of this technical report is to (1) present and discuss current understandings of gas retention and release mechanisms for deep sludge in U.S. Department of Energy (DOE) complex waste storage tanks; and (2) to identify viable methods/criteria for demonstrating safety relative to deep sludge gas release events (DSGRE) in the near term to support the Hanford C-Farm retrieval mission. A secondary purpose is to identify viable methods/criteria for demonstrating safety relative to DSGREs in the longer term to support the mission to retrieve waste from the Hanford Tank Farms and deliver it to the Waste Treatment and Immobilization Plant (WTP). The potential DSGRE issue resulted in the declaration of a positive Unreviewed Safety Question (USQ). C-Farm retrievals are currently proceeding under a Justification for Continued Operation (JCO) that only allows tanks 241-AN-101 and 241-AN-106 sludge levels of 192 inches and 195 inches, respectively. C-Farm retrievals need deeper sludge levels (approximately 310 inches in 241-AN-101 and approximately 250 inches in 241-AN-106). This effort is to provide analytical data and justification to continue retrievals in a safe and efficient manner.

Sams, Terry L.

2013-08-15T23:59:59.000Z

420

Evaluation of Aqua-Ammonia Chiller Technologies and Field Site Installation  

SciTech Connect (OSTI)

The Naval Facilities Engineering Service Center (NFESC) has sponsored Oak Ridge National Laboratory (ORNL) to review, select, and evaluate advanced, gas-fired, 5-ton, aqua-ammonia, chiller technologies. The selection criteria was that units have COP values of 0.67 or better at Air-conditioning and Refrigeration Institute (ARI) 95 F outdoor rating conditions, an active refrigerant flow control, and a variable-speed condenser fan. These features are expected to allow these units to operate at higher ambient temperatures (up to the maximum operating temperature of 110 F) with minimal degradation in performance. ORNL evaluated three potential manufacturers of advanced, gas-fired, 5-ton, aqua-ammonia chillers-Robur, Ambian, and Cooling Technologies. Unfortunately, Robur did not meet the COP requirements and Cooling Technologies could not deliver a unit to be tested at the U.S. Department of Energy (DOE)-ORNL environmental chamber testing facility for thermally activated heat pumps. This eliminated these two technologies from further consideration, leaving only the Ambian chillers for evaluation. Two Ambian chillers were evaluated at the DOE-ORNL test facility. Overall these chillers operated well over a wide range of ambient conditions with minimal degradation in performance due to several control strategies used such as a variable speed condenser fan, a modulating burner, and active refrigerant flow control. These Ambian pre-commercial units were selected for installation and field testing at three federal facilities. NFESC worked with ORNL to assist with the site selection for installation and evaluation of these chillers. Two sites (ORNL and Naval Surface Warfare Center [NSWC] Corona) had a single chiller unit installed; and at one site (Naval Amphibious Base [NAB] Little Creek), two 5-ton chillers linked together were installed to provide 10 tons of cooling. A chiller link controller developed under this project was evaluated in the field test at Little Creek.

Zaltash, Abdolreza [ORNL

2007-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

274 CEREAL CHEMISTRY ANALYTICAL TECHNIQUES AND INSTRUMENTATION  

E-Print Network [OSTI]

274 CEREAL CHEMISTRY ANALYTICAL TECHNIQUES AND INSTRUMENTATION Evaluation of the Displacement Value). Production of fuel-grade ethanol, initiated in the late 1970's as a result of rising gasoline prices

422

Process Analytical Technology in biopharmaceutical manufacturing  

E-Print Network [OSTI]

Process Analytical Technology (PAT) became a well-defined concept within the pharmaceutical industry as a result of a major initiative by the FDA called "Pharmaceutical cGMPs for the 21st Century: A Risk-Based Approach." ...

Cosby, Samuel T. (Samuel Thomas)

2013-01-01T23:59:59.000Z

423

Development of Analytical Methodology for Neurochemical Investigations  

E-Print Network [OSTI]

on the fabrication and characterization of the novel carbon-based electrode material, pyrolyzed photoresist. The fabrication of pyrolyzed photoresist film (PPF) electrodes was optimized for use in microchip electrophoresis and analytical performance was characterized...

Fischer, David John

2010-01-25T23:59:59.000Z

424

Sensor for detecting and differentiating chemical analytes  

DOE Patents [OSTI]

A sensor for detecting and differentiating chemical analytes includes a microscale body having a first end and a second end and a surface between the ends for adsorbing a chemical analyte. The surface includes at least one conductive heating track for heating the chemical analyte and also a conductive response track, which is electrically isolated from the heating track, for producing a thermal response signal from the chemical analyte. The heating track is electrically connected with a voltage source and the response track is electrically connected with a signal recorder. The microscale body is restrained at the first end and the second end and is substantially isolated from its surroundings therebetween, thus having a bridge configuration.

Yi, Dechang (Metuchen, NJ); Senesac, Lawrence R. (Knoxville, TN); Thundat, Thomas G. (Knoxville, TN)

2011-07-05T23:59:59.000Z

425

Scale-Up Information for Gas-Phase Ammonia Treatment of Uranium in the Vadose Zone at the Hanford Site Central Plateau  

SciTech Connect (OSTI)

Uranium is present in the vadose zone at the Hanford Central Plateau and is of concern for protection of groundwater. The Deep Vadose Zone Treatability Test Plan for the Hanford Central Plateau identified gas-phase treatment and geochemical manipulation as potentially effective treatment approaches for uranium and technetium in the Hanford Central Plateau vadose zone. Based on laboratory evaluation, use of ammonia vapor was selected as the most promising uranium treatment candidate for further development and field testing. While laboratory tests have shown that ammonia treatment effectively reduces the mobility of uranium, additional information is needed to enable deployment of this technology for remediation. Of importance for field applications are aspects of the technology associated with effective distribution of ammonia to a targeted treatment zone, understanding the fate of injected ammonia and its impact on subsurface conditions, and identifying effective monitoring approaches. In addition, information is needed to select equipment and operational parameters for a field design. As part of development efforts for the ammonia technology for remediation of vadose zone uranium contamination, field scale-up issues were identified and have been addressed through a series of laboratory and modeling efforts. This report presents a conceptual description for field application of the ammonia treatment process, engineering calculations to support treatment design, ammonia transport information, field application monitoring approaches, and a discussion of processes affecting the fate of ammonia in the subsurface. The report compiles this information from previous publications and from recent research and development activities. The intent of this report is to provide technical information about these scale-up elements to support the design and operation of a field test for the ammonia treatment technology.

Truex, Michael J.; Szecsody, James E.; Zhong, Lirong; Thomle, Jonathan N.; Johnson, Timothy C.

2014-09-01T23:59:59.000Z

426

NOx adsorber and method of regenerating same  

DOE Patents [OSTI]

New technologies, such as NOx adsorber catalytic converters, are being used to meet increasingly stringent regulations on undesirable emissions, including NOx emissions. NOx adsorbers must be periodically regenerated, which requires an increased fuel consumption. The present disclosure includes a method of regenerating a NOx adsorber within a NOx adsorber catalytic converter. At least one sensor positioned downstream from the NOx adsorber senses, in the downstream exhaust, at least one of NOx, nitrous oxide and ammonia concentrations a plurality of times during a regeneration phase. The sensor is in communication with an electronic control module that includes a regeneration monitoring algorithm operable to end the regeneration phase when a time rate of change of the at least one of NOx, nitrous oxide and ammonia concentrations is after an expected plateau region begins.

Endicott, Dennis L. (Peoria, IL); Verkiel, Maarten (Metamora, IL); Driscoll, James J. (Dunlap, IL)

2007-01-30T23:59:59.000Z

427

Transfer Operators for Coupled Analytic Maps  

E-Print Network [OSTI]

We consider analytic coupled map lattices over $\\Z^d$ with exponentially decaying interaction. We introduce Banach spaces for the infinite-dimensional system that include measures with analytic, exponentially bounded finite dimensional marginals. Using residue calculus and `cluster expansion'-like techniques we define transfer operators on these Banach spaces. For these we get a unique probability measure that exhibits exponential decay of correlations.

Torsten Fischer; Hans Henrik Rugh

1997-11-18T23:59:59.000Z

428

Building up the elliptic flow: analytical insights  

E-Print Network [OSTI]

In this paper, we present a fully analytical description of the early-stage formation of elliptic flow in relativistic viscous hydrodynamics. We first construct an elliptic deformation of Gubser flow which is a boost invariant solution of the Navier-Stokes equation with a nontrivial transverse profile. We then analytically calculate the momentum anisotropy of the flow as a function of time and discuss the connection with the empirical formula by Bhalerao {\\it et al.} regarding the viscosity dependence of elliptic flow.

Yoshitaka Hatta; Bo-Wen Xiao

2014-07-15T23:59:59.000Z

429

Analytic Evolution of Singular Distribution Amplitudes in QCD  

SciTech Connect (OSTI)

We describe a method of analytic evolution of distribution amplitudes (DA) that have singularities, such as non-zero values at the end-points of the support region, jumps at some points inside the support region and cusps. We illustrate the method by applying it to the evolution of a flat (constant) DA, anti-symmetric at DA and then use it for evolution of the two-photon generalized distribution amplitude. Our approach has advantages over the standard method of expansion in Gegenbauer polynomials, which requires infinite number of terms in order to accurately reproduce functions in the vicinity of singular points, and over a straightforward iteration of an initial distribution with evolution kernel. The latter produces logarithmically divergent terms at each iteration, while in our method the logarithmic singularities are summed from the start, which immediately produces a continuous curve, with only one or two iterations needed afterwards in order to get rather precise results.

Radyushkin, Anatoly V. [Old Dominion University, Norfolk, VA (United States); Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Tandogan Kunkel, Asli [Old Dominion University, Norfolk, VA (United States); Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

2014-03-01T23:59:59.000Z

430

Summative Mass Analysis of Algal Biomass ? Integration of Analytical...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summative Mass Analysis of Algal Biomass - Integration of Analytical Procedures Laboratory Analytical Procedure (LAP) Issue Date: December 2, 2013 L. M. L. Laurens Technical Report...

431

BUSINESS ANALYTICS CONCENTRATION FOR UNDERGRADUATES The business analytics concentration, like a major, focuses on using information to develop business  

E-Print Network [OSTI]

their business models. Possible Job Titles Data scientist, business analytics specialist, customer relationshipBUSINESS ANALYTICS CONCENTRATION FOR UNDERGRADUATES The business analytics concentration, like a major, focuses on using information to develop business insights and influence decision

Salama, Khaled

432

Ammonia as an Alternative Energy Storage Medium for Hydrogen Fuel Cells: Scientific and Technical Review for Near-Term Stationary Power Demonstration Projects, Final Report  

E-Print Network [OSTI]

as a fuel in solid oxide fuel cells, J. Power Sources 118:L. and Bloomfield, D.P. , Ammonia Cracker for Fuel Cells,1998 Fuel Cell Seminar Abstracts, November 16-19, Palm

Lipman, Tim; Shah, Nihar

2007-01-01T23:59:59.000Z

433

ccsd-00009098,version1-26Sep2005 Analytical Bethe ansatz in gl(N) spin chains  

E-Print Network [OSTI]

ccsd-00009098,version1-26Sep2005 Analytical Bethe ansatz in gl(N) spin chains D. Arnaudon(a) , N of the analytical Bethe ansatz for gl(N) spin chains admitting on each site an arbitrary representation. The method in [1, 2]. It is a unified presentation which applies to any gl(N ) spin chain (whatever the quantum

Paris-Sud XI, Université de

434

Chemical Hydrogen Storage Using Polyhedral Borane Anions and Aluminum-Ammonia-Borane Complexes  

SciTech Connect (OSTI)

Phase 1. Hydrolysis of borohydride compounds offer the potential for significant hydrogen storage capacity, but most work to date has focused on one particular anion, BH4-, which requires high pH for stability. Other borohydride compounds, in particular polyhedral borane anions offer comparable hydrogen storage capacity without requiring high pH media and their long term thermal and hydrolytic stability coupled with non-toxic nature make them a very attractive alternative to NaBH4. The University of Missouri project provided the overall program focal point for the investigation of catalytic hydrolysis of polyhedral borane anions for hydrogen release. Due to their inherent stability, a transition metal catalyst was necessary for the hydrolysis of polyhedral borane anions. Transition metal ions such as cobalt, nickel, palladium and rhodium were investigated for their catalytic activity in the hydrolysis of nido-KB11H14, closo-K2B10H10, and closo-K2B12H12. The rate of hydrolysis follows first-order kinetics with respect to the concentration of the polyhedral borane anion and surface area of the rhodium catalyst. The rate of hydrolysis depends upon a) choice of polyhedral borane anion, c) concentration of polyhedral borane anion, d) surface area of the rhodium catalyst and e) temperature of the reaction. In all cases the yield of hydrogen was 100% which corresponds to ~7 wt% of hydrogen (based on material wt%). Phase 2. The phase 2 of program at the University of Missouri was focused upon developing aluminum ammonia-boranes (Al-AB) as chemical hydrogen storage materials, specifically their synthesis and studies of their dehydrogenation. The ammonia borane molecule (AB) is a demonstrated source of chemically stored hydrogen (19.6 wt%) which meets DOE performance parameters except for its regeneration from spent AB and elemental hydrogen. The presence of an aluminum center bonded to multiple AB residues might combine the efficiency of AB dehydrogenation with an aluminum mediated hydrogenation process leading to reversibility. The Al-AB complexes have comparable hydrogen capacity with other M-AB and have potential to meet DOEs 2010 and 2015 targets for system wt%.

Hawthorne, M. Frederick; Jalisatgi, Satish S.; Safronov, Alexander V.; Lee, Han Beak; Wu, Jianguo

2010-10-01T23:59:59.000Z

435

Computing combustion noise by combining Large Eddy Simulations with analytical models for the propagation of waves  

E-Print Network [OSTI]

Computing combustion noise by combining Large Eddy Simulations with analytical models +++++ Presented by Ignacio Duran Abstract Two mechanisms control combustion noise generation as shown by Marble. A method to calculate combustion-generated noise has been implemented in a tool called CHORUS. The method

Paris-Sud XI, Université de

436

Semantic Interaction for Visual Analytics: Toward Coupling Cognition and Computation  

SciTech Connect (OSTI)

The dissertation discussed in this article [1] was written in the midst of an era of digitization. The world is becoming increasingly instrumented with sensors, monitoring, and other methods for generating data describing social, physical, and natural phenomena. Thus, data exist with the potential of being analyzed to uncover, or discover, the phenomena from which it was created. However, as the analytic models leveraged to analyze these data continue to increase in complexity and computational capability, how can visualizations and user interaction methodologies adapt and evolve to continue to foster discovery and sensemaking?

Endert, Alexander

2014-07-01T23:59:59.000Z

437

An analytically solvable eigenvalue problem for the linear elasticity equations.  

SciTech Connect (OSTI)

Analytic solutions are useful for code verification. Structural vibration codes approximate solutions to the eigenvalue problem for the linear elasticity equations (Navier's equations). Unfortunately the verification method of 'manufactured solutions' does not apply to vibration problems. Verification books (for example [2]) tabulate a few of the lowest modes, but are not useful for computations of large numbers of modes. A closed form solution is presented here for all the eigenvalues and eigenfunctions for a cuboid solid with isotropic material properties. The boundary conditions correspond physically to a greased wall.

Day, David Minot; Romero, Louis Anthony

2004-07-01T23:59:59.000Z

438

Data driven analytic continuation for one particle spectral functions  

SciTech Connect (OSTI)

In this proceeding, an idea is outlined suggesting a generic treatment on any type of input data for a numerical analytic continuation problem, which is needed when dynamical information is to be extracted from a calculationally convenient one particle imaginary time Green function. The quality of the resulting spectral function will rely only on the data to be treated, viz, data-driven. This is different from the Maximum Entropy or the Stochastic method which relies on an entropy term to guide convergence of the resulting spectral function.

Liu, Jun [Ames Laboratory

2013-01-01T23:59:59.000Z

439

Catalytic hydrolysis of urea with fly ash for generation of ammonia in a batch reactor for flue gas conditioning and NOx reduction  

SciTech Connect (OSTI)

Ammonia is a highly volatile noxious material with adverse physiological effects, which become intolerable even at very low concentrations and present substantial environmental and operating hazards and risk. Yet ammonia has long been known to be used for feedstock of flue gas conditioning and NOx reduction. Urea as the source of ammonia for the production of ammonia has the obvious advantages that no ammonia shipping, handling, and storage is required. The process of this invention minimizes the risks and hazards associated with the transport, storage, and use of anhydrous and aqueous ammonia. Yet no such rapid urea conversion process is available as per requirement of high conversion in shorter time, so here we study the catalytic hydrolysis of urea for fast conversion in a batch reactor. The catalyst used in this study is fly ash, a waste material originating in great amounts in combustion processes. A number of experiments were carried out in a batch reactor at different catalytic doses, temperatures, times, and at a constant concentration of urea solution 10% by weight, and equilibrium and kinetic studies have been made.

Sahu, J.N.; Gangadharan, P.; Patwardhan, A.V.; Meikap, B.C. [Indian Institute of Technology, Kharagpur (India). Dept. of Chemical Engineering

2009-01-15T23:59:59.000Z

440

Notes 04. Elements of analytical dynamics.  

E-Print Network [OSTI]

MEEN 617 - Handout 4 Elements of Analytical Mechanics ? 2008 Luis San Andr?s 1 MEEN 617 - Handout 4a ELEMENTS OF ANALYTICAL MECHANICS Newton's laws (Euler's fundamental principles of motion) are formulated for a single particle and easily... Mechanics ? 2008 Luis San Andr?s 2 WORK AND ENERGY FOR A SINGLE PARTICLE Consider a particle (point mass) moving along the curve C under the action of a force F. The position of the particle at any time is given by the position vector r #0;K...

San Andres, Luis

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Technical and economic assessment of the use of ammonia expanders for energy recovery in air-cooled power plants  

SciTech Connect (OSTI)

Binary cycle power plants have been the subject of much discussion among engineers and scientists for nearly 100 years. Current economic and environmental concerns have stimulated new interest and research. Ammonia has been recommended by other studies as the leading contender for use as simply the heat rejection medium in an air-cooled power plant. This study investigates the technical feasibility and economic potential of including an expander in the heat rejection system of an air-cooled power plant. The expander would be used during certain parts of the year to increase the total output of the power plant. Five different plant locations (Miami, San Francisco, Bakersfield, Chicago, Anchorage) were investigated to show the effect which climate has on the economic potential of this ammonia bottoming cycle. The study shows that the expected energy costs for the bottoming cycle only will be less than 50 mills/kWh for any of the five plant locations. This cost assumes that an ammonia phase-change heat rejection system is already a part of the existing plant. The colder climates of Chicago and Anchorage demonstrate an even smaller energy cost of less than 15 mills/kWh. Further investigation of the concept is merited to substantiate these costs and determine the needed technology.

Hauser, S.G.; Hane, G.J.; Johnson, B.M.

1982-07-01T23:59:59.000Z

442

Kinetics Study of Solid Ammonia Borane Hydrogen Release Modeling and Experimental Validation for Chemical Hydrogen Storage  

SciTech Connect (OSTI)

Ammonia borane (AB), NH3BH3, is a promising material for chemical hydrogen storage with 19.6 wt% gravimetric hydrogen capacity of which 16.2 wt% hydrogen can be utilized below 200C. We have investigated the kinetics of hydrogen release from AB and from an AB-methyl cellulose (AB/MC) composite at temperatures of 160-300C using both experiments and modeling. The purpose of our study was to show safe hydrogen release without thermal runaway effects and to validate system model kinetics. AB/MC released hydrogen at ~20C lower than neat AB and at a rate that is two times faster. Based on the experimental results, the kinetics equations were revised to better represent the growth and nucleation process during decomposition of AB. We explored two different reactor concepts; Auger and fixed bed. The current Auger reactor concept turned out to not be appropriate, however, we demonstrated safe self-propagation of the hydrogen release reaction of solid AB/MC in a fixed bed reactor.

Choi, Yong-Joon; Ronnebro, Ewa; Rassat, Scot D.; Karkamkar, Abhijeet J.; Maupin, Gary D.; Holladay, Jamelyn D.; Simmons, Kevin L.; Brooks, Kriston P.

2014-02-24T23:59:59.000Z

443

Guide to Savannah River Laboratory Analytical Services Group  

SciTech Connect (OSTI)

The mission of the Analytical Services Group (ASG) is to provide analytical support for Savannah River Laboratory Research and Development Programs using onsite and offsite analytical labs as resources. A second mission is to provide Savannah River Site (SRS) operations with analytical support for nonroutine material characterization or special chemical analyses. The ASG provides backup support for the SRS process control labs as necessary.

Not Available

1990-04-01T23:59:59.000Z

444

Toby D. Couture E3Analytics  

E-Print Network [OSTI]

Acknowledgments This work was funded by the U.S. Department of Energy's (DOE) Solar Energy Technologies Program (German Renewable Energy Sources Act) EU ­ European Union FIT ­ feed-in tariff IOU ­ investorToby D. Couture E3Analytics Karlynn Cory Claire Kreycik NationalRenewableEnergyLaboratory Emily

445

NERSC Analytics Program Status and Update  

E-Print Network [OSTI]

spanning all aspects of analytics, high performance computing, and many science domains. · SGI Altix ­ 32, application, and deployment of a diverse array of technologies spanning the domains of high performance computing, data management, data analysis and visualization, and workflow management. #12;DOE CGF April 29

Geddes, Cameron Guy Robinson

446

Analytical Study of Thermonuclear Reaction Probability Integrals  

E-Print Network [OSTI]

An analytic study of the reaction probability integrals corresponding to the various forms of the slowly varying cross-section factor $S(E)$ is attempted. Exact expressions for reaction probability integrals are expressed in terms of the extended gamma functions.

M. A. Chaudhry; H. J. Haubold; A. M. Mathai

2000-01-16T23:59:59.000Z

447

MODIFIED KREIN FORMULA AND ANALYTIC PERTURBATION PROCEDURE  

E-Print Network [OSTI]

mathematical problem concerning perturbation of embedded eigen- values. For practical needs consisting of a single compact quantum well and few semi-infinite wires attached to it. In the theoretical-body scattering problem. In this paper we suggest a semi-analytic perturbation procedure which permits

448

Selective catalytic reduction of nitrogen oxides by ammonia over Fe{sup 3+}-exchanged TiO{sub 2}-pillared clay catalysts  

SciTech Connect (OSTI)

Fe-exchanged TiO{sub 2}-pillared clay (PILC) catalysts were prepared and used for selective catalytic reduction (SCR) of NO{sub x} by ammonia. They were also characterized for surface area, pore size distribution, and by XRD, H{sub 2}-TPR, and FT-IR methods. The Fe-TiO{sub 2}-PILC catalysts showed high activities in the reduction of NO{sub x} by NH{sub 3} in the presence of excess oxygen. SO{sub 2} further increased the catalytic activities at above 350 C, whereas H{sub 2}O decreased the activity slightly. The catalysts were about twice as active as commercial-type V{sub 2}O{sub 5}-WO{sub 3}/TiO{sub 2} catalyst in the presence of H{sub 2}O and SO{sub 2}. Moreover, compared to the commercial catalyst, the Fe-TiO{sub 2}-PILC catalysts had higher N{sub 2}/N{sub 2}O product selectivities (e.g., 0--1% vs 9% N{sub 2}O at 400 C) and substantially lower activities (by 74--88%) for SO{sub 2} oxidation to SO{sub 3} under the same reaction conditions. The activity was further increased to over three times that of the vanadia-based catalyst when Ce was added. The high activity and low N{sub 2}O selectivity for the Fe-TiO{sub 2}-PILC catalysts were attributed to their low activity in the oxidation of ammonia, as compared with vanadia catalysts. XRD patterns of Fe-TiO{sub 2}-PILC were similar to those of TiO{sub 2}-PILC, showing no peaks due to iron oxide, even when the iron content reached 20.1%. The TPR results indicated that iron in the Fe-TiO{sub 2}-PILC catalysts with lower iron contents existed in the form of isolated Fe{sup 3+} ions. The activities of Fe-TiO{sub 2}-PILC catalysts were consistent with their surface acidities, which were identified by FT-IR of the NH{sub 3}-adsorbed samples. The enhancement of activities by H{sub 2}O + SO{sub 2} was attributed to the increase of surface acidity resulting from the formation of surface sulfate species of iron.

Long, R.Q.; Yang, R.T. [Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Chemical Engineering] [Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Chemical Engineering

1999-09-10T23:59:59.000Z

449

Method and apparatus for forming conformal SiN.sub.x films  

DOE Patents [OSTI]

A silicon nitride film formation method includes: Heating a substrate to be subjected to film formation to a substrate temperature; heating a wire to a wire temperature; supplying silane, ammonia, and hydrogen gases to the heating member; and forming a silicon nitride film on the substrate.

Wang, Qi (Littleton, CO)

2007-11-27T23:59:59.000Z

450

Notes on analytical study of holographic superconductors with Lifshitz scaling in external magnetic field  

E-Print Network [OSTI]

We employ the matching method to analytically investigate the holographic superconductors with Lifshitz scaling in an external magnetic field. We discuss systematically the restricted conditions for the matching method and find that this analytic method is not always powerful to explore the effect of external magnetic field on the holographic superconductors unless the matching point is chosen in an appropriate range and the dynamical exponent $z$ satisfies the relation $z=d-1$ or $z=d-2$. From the analytic treatment, we observe that Lifshitz scaling can hinder the condensation to be formed, which can be used to back up the numerical results. Moreover, we study the effect of Lifshitz scaling on the upper critical magnetic field and reproduce the well-known relation obtained from Ginzburg-Landau theory.

Zixu Zhao; Qiyuan Pan; Jiliang Jing

2014-07-21T23:59:59.000Z

451

An Analytical Solution on Convective and Diffusive Transport of Analyte in Laminar Flow of Microfluidic Slit  

E-Print Network [OSTI]

Microfluidic devices could find applications in many areas, such as BioMEMs, miniature fuel cells and microfluidic cooling of electronic circuitry. One of the important considerations of microfluidic device in analytical ...

Chen, X.

452

BN Bonded BN fiber article and method of manufacture  

DOE Patents [OSTI]

A boron nitride bonded boron nitride fiber article and the method for its manufacture which comprises forming a shaped article with a composition comprising a bonding compound selected from boron oxide and boric acid and a structural fiber selected from the group consisting of boron oxide, boron nitride and partially nitrided boron oxide fibers, heating the composition in an anhydrous gas to a temperature above the melting point of the compound and nitriding the resulting article in ammonia gas.

Hamilton, Robert S. (Youngstown, NY)

1981-08-18T23:59:59.000Z

453

Method for controlling corrosion in thermal vapor injection gases  

DOE Patents [OSTI]

An improvement in the method for producing high pressure thermal vapor streams from combustion gases for injection into subterranean oil producing formations to stimulate the production of viscous minerals is described. The improvement involves controlling corrosion in such thermal vapor gases by injecting water near the flame in the combustion zone and injecting ammonia into a vapor producing vessel to contact the combustion gases exiting the combustion chamber.

Sperry, John S. (Houston, TX); Krajicek, Richard W. (Houston, TX)

1981-01-01T23:59:59.000Z

454

Analytic solutions of topologically disjoint systems  

E-Print Network [OSTI]

We describe a procedure to solve an up to $2N$ problem where the particles are separated topologically in $N$ groups with at most two particles in each. Arbitrary interactions are allowed between the (two) particles within one group. All other interactions are approximated by harmonic oscillator potentials. The problem is first reduced to an analytically solvable $N$-body problem and $N$ independent two-body problems. We calculate analytically spectra, wave functions, and normal modes for both the inverse square and delta-function two-body interactions. In particular, we calculate separation energies between two strings of particles. We find that the string separation energy increases with $N$ and interaction strength.

J. R. Armstrong; A. G. Volosniev; D. V. Fedorov; A. S. Jensen; N. T. Zinner

2015-01-29T23:59:59.000Z

455

Analytical model for Stirling cycle machine design  

E-Print Network [OSTI]

In order to study further the promising free piston Stirling engine architecture, there is a need of an analytical thermodynamic model which could be used in a dynamical analysis for preliminary design. To aim at more realistic values, the models have to take into account the heat losses and irreversibilities on the engine. An analytical model which encompasses the critical flaws of the regenerator and furthermore the heat exchangers effectivenesses has been developed. This model has been validated using the whole range of the experimental data available from the General Motor GPU-3 Stirling engine prototype. The effects of the technological and operating parameters on Stirling engine performance have been investigated. In addition to the regenerator influence, the effect of the cooler effectiveness is underlined.

Formosa, Fabien; 10.1016/j.enconman.2010.02.010

2013-01-01T23:59:59.000Z

456

Visual Analytics and Storytelling through Video  

SciTech Connect (OSTI)

This paper supplements a video clip submitted to the Video Track of IEEE Symposium on Information Visualization 2005. The original video submission applies a two-way storytelling approach to demonstrate the visual analytics capabilities of a new visualization technique. The paper presents our video production philosophy, describes the plot of the video, explains the rationale behind the plot, and finally, shares our production experiences with our readers.

Wong, Pak C.; Perrine, Kenneth A.; Mackey, Patrick S.; Foote, Harlan P.; Thomas, Jim

2005-10-31T23:59:59.000Z

457

Hanford Environmental Analytical Methods (methods of of March 1990). Volume 1  

SciTech Connect (OSTI)

Techniques in use at the Hanford Reservation as of March, 1990 for the analysis of liquids and radioactive effluents are described. Limitations and applications of the techniques are included.

Goheen, S.C.; McCulloch, M.; Daniel, J.L.

1993-05-01T23:59:59.000Z

458

E-Print Network 3.0 - analytical methods methods Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of Marine Benthic Ecology and Evolution, Collection: Biology and Medicine ; Environmental Sciences and Ecology 12 Multicriteria analysis problems Multicriteria analysis problem may...

459

Experimental and analytical study of rotating cavitation  

SciTech Connect (OSTI)

This paper describes experimental and analytical results of rotating cavitation. There are four major sections in this paper. The first section presents the main characteristics of rotating cavitation which was found in the inducer test using a water tunnel. The second section describes the rotating cavitation which occurred in the development test of an LE-7 liquid oxygen pump for the H-II rocket. Also described in this section is how the rotating cavitation was suppressed. The rotating cavitation was the cause of both super synchronous shaft vibration and an unstable head coefficient curve. The third section presents how the theory of rotating cavitation was developed. The final section shows the measured cavitation compliance and mass flow gain factor of the LE-7 pump inducer for comparison of the experimental and analytical results of the rotating cavitation of the LE-7 pump inducer. Almost all the information presented in this paper has already been reported by Kamijo et al. (1977, 1980, 1993, 1993) and by Shimura (1993). In the present paper, the authors attempt to combine and give a clear overview of the experimental and analytical results described in the previous papers to systematically show their experience and findings on rotating cavitation.

Kamijo, Kenjiro; Shimura, Takashi; Tsujimoto, Yoshinobu [National Aerospace Lab., Miyagi (Japan). Kakuda Research Center

1994-12-31T23:59:59.000Z

460

An Analytical Study of Thermophoretic Particulate Deposition in Turbulent Pipe Flows  

SciTech Connect (OSTI)

The presence of a cold surface in non-isothermal pipe flows conveying submicron particles causes thermophoretic particulate deposition. In this study, an analytical method is developed to estimate thermophoretic particulate deposition efficiency and its effect on overall heat transfer coefficient of pipe flows in transition and turbulent flow regimes. The proposed analytical solution has been validated against experiments conducted at Oak Ridge National Laboratory. Exhaust gas carrying submicron soot particles was passed through pipes with a constant wall temperature and various designed boundary conditions to correlate transition and turbulent flow regimes. Prediction of the reduction in heat transfer coefficient and particulate mass deposited has been compared with experiments. The results of the analytical method are in a reasonably good agreement with experiments.

Abarham, Mehdi [University of Michigan; Hoard, John W. [University of Michigan; Assanis, Dennis [University of Michigan; Styles, Dan [Ford Motor Company; Sluder, Scott [ORNL; Storey, John Morse [ORNL

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Accelerator waste - A new challenge for radio-analytics  

SciTech Connect (OSTI)

The Paul Scherrer Institute (PSI) at Villigen (Switzerland) operates the most powerful accelerator facility in Europe. Due to the increasing quantities of accelerator waste with almost unknown radionuclide inventory, the development of new radio-analytical methods is an urgent task. Besides the characterization by {gamma}-measurements and dose rate determinations, also the investigation of long-lived radionuclides, being probably essential for a final disposal, is required from Swiss authorities. Chemical separation is necessary for the determination of the majority of these isotopes. As a representative example for such studies, the analytics of a beam dump assembly is introduced. Samples were taken from the target E beam dump station from the 590 MeV proton accelerator facility. The content of several radionuclides with half-lives between 2 and 10{sup 7} years was determined by {gamma}-spectrometry and, after chemical separation, by Liquid Scintillation Counting (LSC) as well as Accelerator Mass Spectrometry (AMS). The results are compared with theoretical predictions. Long-term object of these studies is the elaboration of nuclide vectors, which allow the estimation of nuclide inventories by simple calculations. (authors)

Schumann, Dorothea; Neuhausen, Joer; Wohlmuther, Michaelg [Paul Scherrer Institute 5232, Villigen PSI (Switzerland)

2007-07-01T23:59:59.000Z

462

Predicting Student Success using Analytics in Course Learning Management Systems  

SciTech Connect (OSTI)

Educational data analytics is an emerging discipline, concerned with developing methods for exploring the unique types of data that come from the educational context. For example, predicting college student performance is crucial for both the student and educational institutions. It can support timely intervention to prevent students from failing a course, increasing efficacy of advising functions, and improving course completion rate. In this paper, we present the efforts carried out at Oak Ridge National Laboratory (ORNL) toward conducting predictive analytics to academic data collected from 2009 through 2013 and available in one of the most commonly used learning management systems, called Moodle. First, we have identified the data features useful for predicting student outcomes such as students scores in homework assignments, quizzes, exams, in addition to their activities in discussion forums and their total GPA at the same term they enrolled in the course. Then, Logistic Regression and Neural Network predictive models are used to identify students as early as possible that are in danger of failing the course they are currently enrolled in. These models compute the likelihood of any given student failing (or passing) the current course. Numerical results are presented to evaluate and compare the performance of the developed models and their predictive accuracy.

Olama, Mohammed M [ORNL] [ORNL; Thakur, Gautam [ORNL] [ORNL; McNair, Wade [ORNL] [ORNL; Sukumar, Sreenivas R [ORNL] [ORNL

2014-01-01T23:59:59.000Z

463

Model and Analytic Processes for Export License Assessments  

SciTech Connect (OSTI)

This paper represents the Department of Energy Office of Nonproliferation Research and Development (NA-22) Simulations, Algorithms and Modeling (SAM) Program's first effort to identify and frame analytical methods and tools to aid export control professionals in effectively predicting proliferation intent; a complex, multi-step and multi-agency process. The report focuses on analytical modeling methodologies that alone, or combined, may improve the proliferation export control license approval process. It is a follow-up to an earlier paper describing information sources and environments related to international nuclear technology transfer. This report describes the decision criteria used to evaluate modeling techniques and tools to determine which approaches will be investigated during the final 2 years of the project. The report also details the motivation for why new modeling techniques and tools are needed. The analytical modeling methodologies will enable analysts to evaluate the information environment for relevance to detecting proliferation intent, with specific focus on assessing risks associated with transferring dual-use technologies. Dual-use technologies can be used in both weapons and commercial enterprises. A decision-framework was developed to evaluate which of the different analytical modeling methodologies would be most appropriate conditional on the uniqueness of the approach, data availability, laboratory capabilities, relevance to NA-22 and Office of Arms Control and Nonproliferation (NA-24) research needs and the impact if successful. Modeling methodologies were divided into whether they could help micro-level assessments (e.g., help improve individual license assessments) or macro-level assessment. Macro-level assessment focuses on suppliers, technology, consumers, economies, and proliferation context. Macro-level assessment technologies scored higher in the area of uniqueness because less work has been done at the macro level. An approach to developing testable hypotheses for the macro-level assessment methodologies is provided. The outcome of this works suggests that we should develop a Bayes Net for micro-level analysis and continue to focus on Bayes Net, System Dynamics and Economic Input/Output models for assessing macro-level problems. Simultaneously, we need to develop metrics for assessing intent in export control, including the risks and consequences associated with all aspects of export control.

Thompson, Sandra E.; Whitney, Paul D.; Weimar, Mark R.; Wood, Thomas W.; Daly, Don S.; Brothers, Alan J.; Sanfilippo, Antonio P.; Cook, Diane; Holder, Larry

2011-09-29T23:59:59.000Z

464

analytical tool supporting: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

an Analytical Tool for Track Component Response (I-TRACK) Thiago B. do Carmo, J, NV 7 October 2013 12;Slide 2Simplified Analytical Tool and Parametric Analysis Outline ...

465

An Interactive Visual Analytics Framework for Multi-Field Data...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Interactive Visual Analytics Framework for Multi-Field Data in a Geo-Spatial Context. An Interactive Visual Analytics Framework for Multi-Field Data in a Geo-Spatial Context....

466

validation_vs66_fe_and_analytical_dry.eps  

E-Print Network [OSTI]

Page 1. 0. 50. 100. 150. 2. Frequency (Hz). 800. 1000. 1200. 1400. Phase velocity (m/s). Numerical. Analytical.

santos

467

An analytically solvable, axially non-homogeneous reactor model  

E-Print Network [OSTI]

and Glasstone,1970) and analytically in 1-D noise problems (Kosa ly et al., 1977). The general conclusion

Pzsit, Imre

468

Analytical solutions to a hillslope-storage kinematic wave equation for subsurface flow  

E-Print Network [OSTI]

Analytical solutions to a hillslope-storage kinematic wave equation for subsurface flow Peter Troch­617] to describe the bedrock slope, we derive more general solutions to the hillslope-storage kinematic wave reserved. Keywords: Hillslope hydrology; Subsurface flow; Kinematic wave approximation; Method

Loon, E. Emiel van

469

Neutron Noise Calculations in Hexagonal Geometry and Comparison with Analytical Solutions  

E-Print Network [OSTI]

for addressing the noise calculations of light water reactors ~LWRs! in Cartesian geometries.3 This tool instability, etc. Extension of the noise calculation method to other reactor types such as Russian VVERsNeutron Noise Calculations in Hexagonal Geometry and Comparison with Analytical Solutions Hoai Nam

Demazière, Christophe

470

Analytic Models of Plausible Gravitational Lens Potentials  

SciTech Connect (OSTI)

Gravitational lenses on galaxy scales are plausibly modeled as having ellipsoidal symmetry and a universal dark matter density profile, with a Sersic profile to describe the distribution of baryonic matter. Predicting all lensing effects requires knowledge of the total lens potential: in this work we give analytic forms for that of the above hybrid model. Emphasizing that complex lens potentials can be constructed from simpler components in linear combination, we provide a recipe for attaining elliptical symmetry in either projected mass or lens potential.We also provide analytic formulae for the lens potentials of Sersic profiles for integer and half-integer index. We then present formulae describing the gravitational lensing effects due to smoothly-truncated universal density profiles in cold dark matter model. For our isolated haloes the density profile falls off as radius to the minus fifth or seventh power beyond the tidal radius, functional forms that allow all orders of lens potential derivatives to be calculated analytically, while ensuring a non-divergent total mass. We show how the observables predicted by this profile differ from that of the original infinite-mass NFW profile. Expressions for the gravitational flexion are highlighted. We show how decreasing the tidal radius allows stripped haloes to be modeled, providing a framework for a fuller investigation of dark matter substructure in galaxies and clusters. Finally we remark on the need for finite mass halo profiles when doing cosmological ray-tracing simulations, and the need for readily-calculable higher order derivatives of the lens potential when studying catastrophes in strong lenses.

Baltz, Edward A.; Marshall, Phil; Oguri, Masamune

2007-05-04T23:59:59.000Z

471

Analytic models of plausible gravitational lens potentials  

SciTech Connect (OSTI)

Gravitational lenses on galaxy scales are plausibly modelled as having ellipsoidal symmetry and a universal dark matter density profile, with a Sersic profile to describe the distribution of baryonic matter. Predicting all lensing effects requires knowledge of the total lens potential: in this work we give analytic forms for that of the above hybrid model. Emphasising that complex lens potentials can be constructed from simpler components in linear combination, we provide a recipe for attaining elliptical symmetry in either projected mass or lens potential. We also provide analytic formulae for the lens potentials of Sersic profiles for integer and half-integer index. We then present formulae describing the gravitational lensing effects due to smoothly-truncated universal density profiles in cold dark matter model. For our isolated haloes the density profile falls off as radius to the minus fifth or seventh power beyond the tidal radius, functional forms that allow all orders of lens potential derivatives to be calculated analytically, while ensuring a non-divergent total mass. We show how the observables predicted by this profile differ from that of the original infinite-mass NFW profile. Expressions for the gravitational flexion are highlighted. We show how decreasing the tidal radius allows stripped haloes to be modelled, providing a framework for a fuller investigation of dark matter substructure in galaxies and clusters. Finally we remark on the need for finite mass halo profiles when doing cosmological ray-tracing simulations, and the need for readily-calculable higher order derivatives of the lens potential when studying catastrophes in strong lenses.

Baltz, Edward A.; Marshall, Phil; Oguri, Masamune, E-mail: eabaltz@slac.stanford.edu, E-mail: pjm@physics.ucsb.edu, E-mail: oguri@slac.stanford.edu [Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, PO Box 20450, MS29, Stanford, CA 94309 (United States)] [Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, PO Box 20450, MS29, Stanford, CA 94309 (United States)

2009-01-15T23:59:59.000Z

472

Photovoltaic Degradation Rates -- An Analytical Review  

SciTech Connect (OSTI)

As photovoltaic penetration of the power grid increases, accurate predictions of return on investment require accurate prediction of decreased power output over time. Degradation rates must be known in order to predict power delivery. This article reviews degradation rates of flat-plate terrestrial modules and systems reported in published literature from field testing throughout the last 40 years. Nearly 2000 degradation rates, measured on individual modules or entire systems, have been assembled from the literature, showing a median value of 0.5%/year. The review consists of three parts: a brief historical outline, an analytical summary of degradation rates, and a detailed bibliography partitioned by technology.

Jordan, D. C.; Kurtz, S. R.

2012-06-01T23:59:59.000Z

473

Analytical Services Program | Department of Energy  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energyon ArmedWaste andAccess to OUO Access to OUOAlaskaMoney |ofAnalytical Services Program

474

NREL: Measurements and Characterization - Analytical Microscopy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the Contributions and Achievements ofLizResultsGeothermalAnalytical Microscopy

475

Scientific Achievement Analytical Transmission Electron Microscopy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmitted forHighlights Nuclear Physics (NP) NPBiogenic Aerosols -eAnalytical

476

Radiochemical method development  

SciTech Connect (OSTI)

The authors have developed methods for chemical characterization of the environment under a multitask project that focuses on improvement of radioanalytical methods with an emphasis on faster and cheaper routine methods. The authors have developed improved methods for separation of environmental levels of technetium-99, radium, and actinides from soil and water; separation of actinides from soil and water matrix interferences; and isolation of strontium. They are also developing methods for simultaneous detection of multiple isotopes (including nonradionuclides) by using a new instrumental technique, inductively coupled plasma-mass spectrometry (ICP-MS). The new ICP-MS methods have greater sensitivity and efficiency and could replace many radiometric techniques. They are using flow injection analysis to integrate and automate the separation methods with the ICP-MS methodology. The final product of all activities will be methods that are available (published in the U.S. Department of Energy`s analytical methods compendium) and acceptable for use in regulatory situations.

Erickson, M.D.; Aldstadt, J.H.; Alvarado, J.S.; Crain, J.S.; Orlandini, K.A.; Smith, L.L.

1994-09-01T23:59:59.000Z

477

Method of multiplexed analysis using ion mobility spectrometer  

DOE Patents [OSTI]

A method for analyzing analytes from a sample introduced into a Spectrometer by generating a pseudo random sequence of a modulation bins, organizing each modulation bin as a series of submodulation bins, thereby forming an extended pseudo random sequence of submodulation bins, releasing the analytes in a series of analyte packets into a Spectrometer, thereby generating an unknown original ion signal vector, detecting the analytes at a detector, and characterizing the sample using the plurality of analyte signal subvectors. The method is advantageously applied to an Ion Mobility Spectrometer, and an Ion Mobility Spectrometer interfaced with a Time of Flight Mass Spectrometer.

Belov, Mikhail E. (Richland, WA); Smith, Richard D. (Richland, WA)

2009-06-02T23:59:59.000Z

478

Trends & Controversies: Sociocultural Predictive Analytics and Terrorism Deterrence  

SciTech Connect (OSTI)

The use of predictive analytics to model terrorist rhetoric is highly instrumental in developing a strategy to deter terrorism. Traditional (e.g. Cold-War) deterrence methods are ineffective with terrorist groups such as al Qaida. Terrorists typically regard the prospect of death or loss of property as acceptable consequences of their struggle. Deterrence by threat of punishment is therefore fruitless. On the other hand, isolating terrorists from the community that may sympathize with their cause can have a decisive deterring outcome. Without the moral backing of a supportive audience, terrorism cannot be successfully framed as a justifiable political strategy and recruiting is curtailed. Ultimately, terrorism deterrence is more effectively enforced by exerting influence to neutralize the communicative reach of terrorists.

Sanfilippo, Antonio P.; McGrath, Liam R.

2011-08-12T23:59:59.000Z

479

JOURNAL DE PHYSIQUE CoZZoque C8, suppZ6ment aa n o 8, Tome 42, amAt 2980, page C8-32 NMR STUD1ES OF CONCENTRATED LITHIUM-AMMONIA SOLUTIONS  

E-Print Network [OSTI]

OF CONCENTRATED LITHIUM-AMMONIA SOLUTIONS Y. Nakamura, M. Niibe and M . Shimoji Deparhent o f Chemistry, FaeuZty o in liquid ammonia show very interesting properties with varying metal concentration; from electrolytic results of the Knight shift, KLi, and the spin-lattice relaxation tine, T1, of 7 ~ i in the lithium

Boyer, Edmond

480

Road Transportable Analytical Laboratory system. Phase 1  

SciTech Connect (OSTI)

This developmental effort clearly shows that a Road Transportable Analytical Laboratory System is a worthwhile and achievable goal. The RTAL is designed to fully analyze (radioanalytes, and organic and inorganic chemical analytes) 20 samples per day at the highest levels of quality assurance and quality control. It dramatically reduces the turnaround time for environmental sample analysis from 45 days (at a central commercial laboratory) to 1 day. At the same time each RTAL system will save the DOE over $12 million per year in sample analysis costs compared to the costs at a central commercial laboratory. If RTAL systems were used at the eight largest DOE facilities (at Hanford, Savannah River, Fernald, Oak Ridge, Idaho, Rocky Flats, Los Alamos, and the Nevada Test Site), the annual savings would be $96,589,000. The DOE`s internal study of sample analysis needs projects 130,000 environmental samples requiring analysis in FY 1994, clearly supporting the need for the RTAL system. The cost and time savings achievable with the RTAL system will accelerate and improve the efficiency of cleanup and remediation operations throughout the DOE complex.

Finger, S.M.; Keith, V.F.; Spertzel, R.O.; De Avila, J.C.; O`Donnell, M.; Vann, R.L.

1993-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "analytical method ammonia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Analytical bunch compression studies for FLUTE  

E-Print Network [OSTI]

The current article deals with analytical bunch compression studies for FLUTE whose results are compared to simulations. FLUTE is a linac-based electron accelerator with a design energy of approximately 40 MeV currently being constructed at the Karlsruhe Institute of Technology. One of the goals of FLUTE is to generate electron bunches with their length lying in the femtosecond regime. In the first phase this will be accomplished using a magnetic bunch compressor. This compressor forms the subject of the studies presented. The paper is divided into three parts. The first part deals with pure geometric investigations of the bunch compressor where space charge effects and the back reaction of bunches with coherent synchrotron radiation (CSR) are neglected. The second part is dedicated to the treatment of space charge effects and the third part gives some analytical results on the emission of CSR. The upshot is that the results of the first and the third part agree quite well with what is obtained from simulatio...

Schreck, M

2014-01-01T23:59:59.000Z

482

ANALYTICAL STAR FORMATION RATE FROM GRAVOTURBULENT FRAGMENTATION  

SciTech Connect (OSTI)

We present an analytical determination of the star formation rate (SFR) in molecular clouds, based on a time-dependent extension of our analytical theory of the stellar initial mass function. The theory yields SFRs in good agreement with observations, suggesting that turbulence is the dominant, initial process responsible for star formation. In contrast to previous SFR theories, the present one does not invoke an ad hoc density threshold for star formation; instead, the SFR continuously increases with gas density, naturally yielding two different characteristic regimes, thus two different slopes in the SFR versus gas density relationship, in agreement with observational determinations. Besides the complete SFR derivation, we also provide a simplified expression, which reproduces the complete calculations reasonably well and can easily be used for quick determinations of SFRs in cloud environments. A key property at the heart of both our complete and simplified theory is that the SFR involves a density-dependent dynamical time, characteristic of each collapsing (prestellar) overdense region in the cloud, instead of one single mean or critical freefall timescale. Unfortunately, the SFR also depends on some ill-determined parameters, such as the core-to-star mass conversion efficiency and the crossing timescale. Although we provide estimates for these parameters, their uncertainty hampers a precise quantitative determination of the SFR, within less than a factor of a few.

Hennebelle, Patrick [Laboratoire de Radioastronomie, UMR CNRS 8112, Ecole Normale Superieure et Observatoire de Paris, 24 rue Lhomond, 75231 Paris Cedex 05 (France); Chabrier, Gilles [Ecole Normale Superieure de Lyon, CRAL, UMR CNRS 5574, 69364 Lyon Cedex 07 (France)

2011-12-20T23:59:59.000Z

483

Analyticity and the Holographic S-Matrix  

SciTech Connect (OSTI)

We derive a simple relation between the Mellin amplitude for AdS/CFT correlation functions and the bulk S-Matrix in the flat spacetime limit, proving a conjecture of Penedones. As a consequence of the Operator Product Expansion, the Mellin amplitude for any unitary CFT must be a meromorphic function with simple poles on the real axis. This provides a powerful and suggestive handle on the locality vis-a-vis analyticity properties of the S-Matrix. We begin to explore analyticity by showing how the familiar poles and branch cuts of scattering amplitudes arise from the holographic description. For this purpose we compute examples of Mellin amplitudes corresponding to 1-loop and 2-loop Witten diagrams in AdS. We also examine the flat spacetime limit of conformal blocks, implicitly relating the S-Matrix program to the Bootstrap program for CFTs. We use this connection to show how the existence of small black holes in AdS leads to a universal prediction for the conformal block decomposition of the dual CFT.

Fitzpatrick, A.Liam; /Stanford U., Phys. Dept.; Kaplan, Jared; /SLAC

2012-04-03T23:59:59.000Z

484

Visual Analytics for Power Grid Contingency Analysis  

SciTech Connect (OSTI)

Contingency analysis is the process of employing different measures to model scenarios, analyze them, and then derive the best response to remove the threats. This application paper focuses on a class of contingency analysis problems found in the power grid management system. A power grid is a geographically distributed interconnected transmission network that transmits and delivers electricity from generators to end users. The power grid contingency analysis problem is increasingly important because of both the growing size of the underlying raw data that need to be analyzed and the urgency to deliver working solutions in an aggressive timeframe. Failure to do so may bring significant financial, economic, and security impacts to all parties involved and the society at large. The paper presents a scalable visual analytics pipeline that transforms about 100 million contingency scenarios to a manageable size and form for grid operators to examine different scenarios and come up with preventive or mitigation strategies to address the problems in a predictive and timely manner. Great attention is given to the computational scalability, information scalability, visual scalability, and display scalability issues surrounding the data analytics pipeline. Most of the large-scale computation requirements of our work are conducted on a Cray XMT multi-threaded parallel computer. The paper demonstrates a number of examples using western North American power grid models and data.

Wong, Pak C.; Huang, Zhenyu; Chen, Yousu; Mackey, Patrick S.; Jin, Shuangshuang

2014-01-20T23:59:59.000Z

485

An Approximate Analytical Algorithm for Evaluating the Distances in a Dark Energy Dominated Universe  

E-Print Network [OSTI]

The most recent cosmological observations indicate that the present universe is flat and vacuum dominated. In such a universe, the distance measurements are always difficult and involve numerical computations. In this paper, it is shown that the most fundamental distance measurement of cosmology, the luminosity distance, for such a universe can be obtained in an approximate analytical way with very small errors of less than 0.02% up to %z = 5$ for any value of vacuum energy. The analytical calculation is shown to be exceedingly efficient, as compared to the traditional numerical methods.

T. Wickramasinghe

2007-12-05T23:59:59.000Z

486

STATISTICAL METHODS STATISTICAL METHODS  

E-Print Network [OSTI]

STATISTICAL METHODS 1 STATISTICAL METHODS Arnaud Delorme, Swartz Center for Computational@salk.edu. Keywords: statistical methods, inference, models, clinical, software, bootstrap, resampling, PCA, ICA Abstract: Statistics represents that body of methods by which characteristics of a population are inferred

Delorme, Arnaud

487

Chemical microreactor and method thereof  

DOE Patents [OSTI]

A chemical microreactor suitable for generation of hydrogen fuel from liquid sources such as ammonia, methanol, and butane through steam reforming processes when mixed with an appropriate amount of water contains capillary microchannels with integrated resistive heaters to facilitate the occurrence of catalytic steam reforming reactions. One such microreactor employs a packed catalyst capillary microchannel and at least one porous membrane. Another employs a porous membrane with a large surface area or a porous membrane support structure containing a plurality of porous membranes having a large surface area in the aggregate, i.e., greater than about 1 m.sup.2 /cm.sup.3. The packed catalyst capillary microchannels, porous membranes and porous membrane support structures may be formed by a variety of methods.

Morse, Jeffrey D.; Jankowski, Alan

2005-11-01T23:59:59.000Z

488

ANALYTICAL SCIENCES 2001, VOL. 17 SUPPLEMENT i1031 2001 The Japan Society for Analytical Chemistry  

E-Print Network [OSTI]

Sensors for Copper, Lead and Selenium Samuel P. KOUNAVES 1 , Oksana Yu. NADZHAFOVA 2 , Vladislav TARASOV 1 and Sandie H. TAN 1 1 Department of Chemistry, Tufts University, Medford, MA 02155, USA (E-mail: samuel were analytical grade. Stock metal solutions were prepared from 99.999% Cu (NO3)2 (Johnson Matthey

Kounaves, Samuel P.

489

Analytical, Visual, and Interactive Concepts for Geo-Visual Analytics Heidrun Schumanna,  

E-Print Network [OSTI]

Supporting the visual analysis of structured multivariate geo-spatial data is a challenging task involving [15], Chapter 4). In this work, we consider visual analytics support for the analysis of multivariate and analysis of geo-spatial data. In particular, we address the visualization of hierarchical structures

Tominski, Christian

490

Aptamer- and nucleic acid enzyme-based systems for simultaneous detection of multiple analytes  

DOE Patents [OSTI]

The present invention provides aptamer- and nucleic acid enzyme-based systems for simultaneously determining the presence and optionally the concentration of multiple analytes in a sample. Methods of utilizing the system and kits that include the sensor components are also provided. The system includes a first reactive polynucleotide that reacts to a first analyte; a second reactive polynucleotide that reacts to a second analyte; a third polynucleotide; a fourth polynucleotide; a first particle, coupled to the third polynucleotide; a second particle, coupled to the fourth polynucleotide; and at least one quencher, for quenching emissions of the first and second quantum dots, coupled to the first and second reactive polynucleotides. The first particle includes a quantum dot having a first emission wavelength. The second particle includes a second quantum dot having a second emission wavelength different from the first emission wavelength. The third polynucleotide and the fourth polynucleotide are different.

Lu, Yi (Champaign, IL); Liu, Juewen (Albuquerque, NM)

2011-11-15T23:59:59.000Z

491

Method and apparatus for simultaneous spectroelectrochemical analysis  

DOE Patents [OSTI]

An apparatus and method of simultaneous spectroelectrochemical analysis is disclosed. A transparent surface is provided. An analyte solution on the transparent surface is contacted with a working electrode and at least one other electrode. Light from a light source is focused on either a surface of the working electrode or the analyte solution. The light reflected from either the surface of the working electrode or the analyte solution is detected. The potential of the working electrode is adjusted, and spectroscopic changes of the analyte solution that occur with changes in thermodynamic potentials are monitored.

Chatterjee, Sayandev; Bryan, Samuel A; Schroll, Cynthia A; Heineman, William R

2013-11-19T23:59:59.000Z

492

EVALUATION OF AEROSOL EMISSIONS DOWNSTREAM OF AN AMMONIA-BASED SO2 SCRUBBER  

SciTech Connect (OSTI)

Depending on the size and type of boiler, the 1990 Clean Air Act Amendments required specific reductions in SO{sub 2} emissions from coal-fired electric utilities. To meet these requirements, SO{sub 2} reduction strategies have included installing scrubbing technology, switching to a more expensive low-sulfur coal, or purchasing SO{sub 2} allowances. It is expected that over the next 10 years there will be an increase in the price of low-sulfur coals, but that higher-sulfur coal costs will remain the same. Technologies must be strongly considered that allow the use of high-sulfur fuels while at the same time meeting current and future SO{sub 2} emission limits. One such technology is the ammonia based flue gas desulfurization (FGD) (NH{sub 3}-based FGD) system manufactured by Marsulex Environmental Technologies (MET). The MET scrubber is a patented NH{sub 3}-based FGD process that efficiently converts SO{sub 2} (>95%) into a fertilizer product, ammonium sulfate ([NH{sub 4}]{sub 2}SO{sub 4}). A point of concern for the MET technology, as well as other FGD systems, is the emission of sulfuric acid/SO{sub 3} aerosols that could result in increased opacity at the stack. This is a direct result of firing high-sulfur fuels that naturally generate more SO{sub 3} than do low-sulfur coals. SO{sub 3} is formed during the coal combustion process. SO{sub 3} is converted to gaseous H{sub 2}SO{sub 4} by homogeneous condensation, leading to a submicron acid fume that is very difficult to capture in a dry electrostatic precipitator (ESP). The condensed acid can also combine with the fly ash in the duct and scale the duct wall, potentially resulting in corrosion of both metallic and nonmetallic surfaces. Therefore, SO{sub 3} in flue gas can have a significant impact on the performance of coal-fired utility boilers, air heaters, and ESPs. In addition to corrosion problems, excess SO{sub 3} emissions can result in plume opacity problems. Thus the Energy & Environmental Research Center (EERC) was contracted by MET and the U.S. Department of Energy (DOE) to evaluate the potential of a wet ESP for reducing SO{sub 3} emissions. The work consisted of pilot-scale tests using the EERC's slagging furnace system (SFS) to determine the effectiveness of a wet ESP to control SO{sub 3}/H{sub 2}SO{sub 4} aerosol emissions in conjunction with a dry ESP and MET's NH{sub 3}-based FGD. Because these compounds are in the form of fine particles, it is speculated that a relatively small, highly efficient wet ESP following the MET scrubber would remove these fine aerosol particles. The performance target for the wet ESP was a particulate mass collection efficiency of >90%; this level of performance would likely ensure a stack opacity of <10%.

Dennis L. Laudal

2002-04-01T23:59:59.000Z

493

Laser ablation in analytical chemistry - A review  

SciTech Connect (OSTI)

Laser ablation is becoming a dominant technology for direct solid sampling in analytical chemistry. Laser ablation refers to the process in which an intense burst of energy delivered by a short laser pulse is used to sample (remove a portion of) a material. The advantages of laser ablation chemical analysis include direct characterization of solids, no chemical procedures for dissolution, reduced risk of contamination or sample loss, analysis of very small samples not separable for solution analysis, and determination of spatial distributions of elemental composition. This review describes recent research to understand and utilize laser ablation for direct solid sampling, with emphasis on sample introduction to an inductively coupled plasma (ICP). Current research related to contemporary experimental systems, calibration and optimization, and fractionation is discussed, with a summary of applications in several areas.

Russo, Richard E.; Mao, Xianglei; Liu, Haichen; Gonzalez, Jhanis; Mao, Samuel S.

2001-10-10T23:59:59.000Z

494

Analytical Improvements in PV Degradation Rate Determination  

SciTech Connect (OSTI)

As photovoltaic (PV) penetration of the power grid increases, it becomes vital to know how decreased power output may affect cost over time. In order to predict power delivery, the decline or degradation rates must be determined accurately. For non-spectrally corrected data several complete seasonal cycles (typically 3-5 years) are required to obtain reasonably accurate degradation rates. In a rapidly evolving industry such a time span is often unacceptable and the need exists to determine degradation rates accurately in a shorter period of time. Occurrence of outliers and data shifts are two examples of analytical problems leading to greater uncertainty and therefore to longer observation times. In this paper we compare three methodologies of data analysis for robustness in the presence of outliers, data shifts and shorter measurement time periods.

Jordan, D. C.; Kurtz, S. R.

2011-02-01T23:59:59.000Z

495

Molybdenum-based additives to mixed-metal oxides for use in hot gas cleanup sorbents for the catalytic decomposition of ammonia in coal gases  

DOE Patents [OSTI]

This invention relates to additives to mixed-metal oxides that act simultaneously as sorbents and catalysts in cleanup systems for hot coal gases. Such additives of this type, generally, act as a sorbent to remove sulfur from the coal gases while substantially simultaneously, catalytically decomposing appreciable amounts of ammonia from the coal gases.

Ayala, Raul E. (Clifton Park, NY)

1993-01-01T23:59:59.000Z

496

Astrophysical bow shocks: An analytical solution for the hypersonic blunt body problem in the intergalactic medium  

E-Print Network [OSTI]

Aims: Bow shock waves are a common feature of groups and clusters of galaxies since they are generated as a result of supersonic motion of galaxies through the intergalactic medium. The goal of this work is to present an analytical solution technique for such astrophysical hypersonic blunt body problems. Methods: A method, developed by Schneider (1968, JFM, 31, 397) in the context of aeronautics, allows calculation of the galaxy's shape as long as the shape of the bow shock wave is known (so-called inverse method). In contrast to other analytical models, the solution is valid in the whole flow region (from the stagnation point up to the bow shock wings) and in particular takes into account velocity gradients along the streamlines. We compare our analytical results with two-dimensional hydrodynamical simulations carried out with an extended version of the VH-1 hydrocode which is based on the piecewise parabolic method with a Lagrangian remap. Results: It is shown that the applied method accurately predicts the...

Schulreich, Michael Mathias

2011-01-01T23:59:59.000Z

497

Emission computed tomography of /sup 18/F-fluorodeoxyglucose and /sup 13/N-ammonia in stroke and epilepsy  

SciTech Connect (OSTI)

The ECAT Positron Tomograph was used to scan normal control subjects, stroke patients at various times during recovery, and patients with partial epilepsy during EEG monitoring. /sup 18/F-fluorodeoxyglucose (/sup 18/FDG) and /sup 13/N-Ammonia (/sup 13/NH/sub 3/) were used as indicators of abnormalities in local cerebral glucose utilization (LCMR/sub glc/) and relative perfusion, respectively. Hypometabolism, due to deactivation or minimal damage, was demonstrated with the /sup 18/FDG scan in deep structures and broad zones of cerebral cortex which appeared normal on x-ray CT (XCT) and /sup 99m/Tc pertechnetate scans. In patients with partial epilepsy, who had unilateral or focal electrical abnormalities, interictal /sup 18/FDG scan patterns clearly showed localized regions of decreased (20 to 50%) LCMR/sub glc/, which correlated anatomically with the eventual EEG localization.

Kuhl, D.E.; Phelps, M.E.; Engel, J. Jr.

1980-01-01T23:59:59.000Z

498

E-Print Network 3.0 - ammonia dimethylamine trimethylamine Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Page: << < 1 2 3 4 5 > >> 1 A NOTE ON THE ESTIMATION OF TRIMETHYLAMINE IN FISH MUSCLE Summary: . An improved method to analyze trimethylamine in fish and the...

499

Synthesis and Evaluation of Cu-SAPO-34 Catalysts for Ammonia Selective Catalytic Reduction. 1. Aqueous Solution Ion Exchange  

SciTech Connect (OSTI)

SAPO-34 molecular sieves are synthesized using various structure directing agents (SDAs). Cu-SAPO-34 catalysts are prepared via aqueous solution ion exchange. Catalysts are characterized with surface area/pore volume measurements, temperature programmed reduction (TPR), electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR) spectroscopies. Catalytic properties are examined using standard ammonia selective catalytic reduction (NH3-SCR) and ammonia oxidation reactions. During solution ion exchange, different SAPO-34 samples undergo different extent of structural damage via irreversible hydrolysis. Si content within the samples (i.e., Al-O-Si bond density) and framework stress are key factors that affect irreversible hydrolysis. Even using very dilute Cu acetate solutions, it is not possible to generate Cu-SAPO-34 samples with only isolated Cu2+ ions. Small amounts of CuOx species always coexist with isolated Cu2+ ions. Highly active and selective Cu-SAPO-34 catalysts for NH3-SCR are readily generated using this synthesis protocol, even for SAPO-34 samples that degrade substantially during solution ion exchange. High-temperature aging is found to improve the catalytic performance. This is likely due to reduction of intracrystalline mass-transfer limitations via formation of additional porosity in the highly defective SAPO-34 particles formed after ion exchange. The authors gratefully acknowledge the US Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy, Office of Vehicle Technologies for the support of this work. The research described in this paper was performed at the Environmental Molecular Sciences Laboratory (EMSL), a national scientific user facility sponsored by the DOEs Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory (PNNL). PNNL is operated for the US DOE by Battelle Memorial Institute under contract number DE-AC05-76RL01830.

Gao, Feng; Walter, Eric D.; Washton, Nancy M.; Szanyi, Janos; Peden, Charles HF

2013-09-06T23:59:59.000Z

500

Analytic energy gradients for constrained DFT-configuration interaction  

SciTech Connect (OSTI)

The constrained density functional theory-configuration interaction (CDFT-CI) method has previously been used to calculate ground-state energies and barrier heights, and to describe electronic excited states, in particular conical intersections. However, the method has been limited to evaluating the electronic energy at just a single nuclear configuration, with the gradient of the energy being available only via finite difference. In this paper, we present analytic gradients of the CDFT-CI energy with respect to nuclear coordinates, which gives the potential for accurate geometry optimization and molecular dynamics on both the ground and excited electronic states, a realm which is currently quite challenging for electronic structure theory. We report the performance of CDFT-CI geometry optimization for representative reaction transition states as well as molecules in an excited state. The overall accuracy of CDFT-CI for computing barrier heights is essentially unchanged whether the energies are evaluated at geometries obtained from quadratic configuration-interaction singles and doubles (QCISD) or CDFT-CI, indicating that CDFT-CI produces very good reaction transition states. These results open up tantalizing possibilities for future work on excited states.

Kaduk, Benjamin; Tsuchimochi, Takashi; Van Voorhis, Troy, E-mail: tvan@mit.edu [Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139 (United States)

2014-05-14T23:59:59.000Z