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Note: This page contains sample records for the topic "methane nitrous oxide" 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

MODELING THE EMISSIONS OF NITROUS OXIDE (N20) AND METHANE (CH 4) FROM THE  

E-Print Network [OSTI]

MODELING THE EMISSIONS OF NITROUS OXIDE (N20) AND METHANE (CH 4) FROM THE TERRESTRIAL BIOSPHERE;2 #12;MODELING THE EMISSIONS OF NITROUS OXIDE (N 20) AND METHANE (CH 4) FROM THE TERRESTRIAL BIOSPHERE cli- mate has on natural emissions of N2 0 and CH4 from the terrestrial biosphere to the atmosphere

2

The variability of methane, nitrous oxide and sulfur hexafluoride in Northeast India  

E-Print Network [OSTI]

High-frequency atmospheric measurements of methane (CH[subscript 4]), nitrous oxide (N[subscript 2]O) and sulfur hexafluoride (SF[subscript 6]) from Darjeeling, India are presented from December 2011 (CH[subscript 4])/March ...

Chatterjee, A.

3

AT A GLANCE Title: Hydrogen, Methane and Nitrous oxide: Trend  

E-Print Network [OSTI]

) and nitrous oxide (N2O). The possible future transition to a `hydrogen economy' is expected to lead to a hydrogen economy will affect H2, CH4 and O3 6) Evaluate simulations with a coupled atmospheric chemistry. - The effects of a possible future transfer to a hydrogen economy and the associated reduction in fossil fuel

Haak, Hein

4

Closing the Gaps in the Budgets of Methane and Nitrous Oxide  

SciTech Connect (OSTI)

Together methane and nitrous oxide contribute almost 40% of the estimated increase in radiative forcing caused by the buildup of greenhouse gases during the last 250 years (IPCC, 2007). These increases are attributed to human activities. Since the emissions of these gases are from biogenic sources and closely associated with living things in the major terrestrial ecosystems of the world, climate change is expected to cause feedbacks that may further increase emissions even from systems normally classified as natural. Our results support the idea that while past increases of methane were driven by direct emissions from human activities, some of these have reached their limits and that the future of methane changes may be determined by feedbacks from warming temperatures. The greatly increased current focus on the arctic and the fate of the carbon frozen in its permafrost is an example of such a feedback that could exceed the direct increases caused by future human activities (Zimov et al. 2006). Our research was aimed at three broad areas to address open questions about the global budgets of methane and nitrous oxide. These areas of inquiry were: The processes by which methane and nitrous oxide are emitted, new sources such as trees and plants, and integration of results to refine the global budgets both at present and of the past decades. For the process studies the main research was to quantify the effect of changes in the ambient temperature on the emissions of methane and nitrous oxide from rice agriculture. Additionally, the emissions of methane and nitrous oxide under present conditions were estimated using the experimental data on how fertilizer applications and water management affect emissions. Rice was chosen for detailed study because it is a prototype system of the wider terrestrial source, its role in methane emissions is well established, it is easy to cultivate and it represents a major anthropogenic source. Here we will discuss the highlights of the results that were obtained.

Khalil, Aslam; Rice, Andrew; Rasmussen, Reinhold

2013-11-22T23:59:59.000Z

5

EMISSIONS OF NITROUS OXIDE AND METHANE FROM CONVENTIONAL AND ALTERNATIVE FUEL MOTOR VEHICLES  

E-Print Network [OSTI]

-produced electricity for battery electric vehicles. Already, vehicles powered by compressed natural gas, propane. LIPMAN AND MARK A. DELUCCHI example, promising strategies for powering motor vehicles with reduced GHGEMISSIONS OF NITROUS OXIDE AND METHANE FROM CONVENTIONAL AND ALTERNATIVE FUEL MOTOR VEHICLES

Kammen, Daniel M.

6

Hydrogen, Methane and Nitrous oxide Trend variability, budgets, and interactions with the biosphere  

E-Print Network [OSTI]

emission regulations on CH4 and N2 O, and future impacts of a transition to a `hydrogen economy', taking transition to a `hydrogen economy' in the coming de- cades is likely to cause a significant increaseCH4 H2 N2O ............ ........ Hymn Hydrogen, Methane and Nitrous oxide Trend variability

Haak, Hein

7

The variability of methane, nitrous oxide and sulfur hexafluoride in Northeast India*  

E-Print Network [OSTI]

The variability of methane, nitrous oxide and sulfur hexafluoride in Northeast India* A.L. Ganesan Program on the Science and Policy of Global Change combines cutting-edge scientific research with independent policy analysis to provide a solid foundation for the public and private decisions needed

8

Nitrous Oxide Systems Maintenance in Clinical Areas  

E-Print Network [OSTI]

. It specifically speaks to maintenance of nitrous oxide delivery systems, preventive maintenance for house. Arrange with Facilities for regular preventive maintenance and annual performance check of ventilation). b. Provides preventive maintenance on ventilation system as necessary. c. Coordinates annual

Jia, Songtao

9

The biogeochemistry of marine nitrous oxide  

E-Print Network [OSTI]

Atmospheric nitrous oxide N?O concentrations have been rising steadily for the past century as a result of human activities. In particular, human perturbation of the nitrogen cycle has increased the N?O production rates ...

Frame, Caitlin H

2011-01-01T23:59:59.000Z

10

Process Modeling of Global Soil Nitrous Oxide Emissions  

E-Print Network [OSTI]

Nitrous oxide is an important greenhouse gas and is a major ozone-depleting substance. To understand and

Saikawa, E.

2011-09-01T23:59:59.000Z

11

EIA - Greenhouse Gas Emissions - Nitrous Oxide Emissions  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

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) " ,"ClickPipelines AboutDecemberSteam Coal Import96 4.87CBECS Public Use Data03. U.S. EIA4. Nitrous Oxide

12

METHANE OXIDATION (AEROBIC) Helmut Brgmann  

E-Print Network [OSTI]

METHANE OXIDATION (AEROBIC) Helmut Bürgmann Eawag, Swiss Federal Institute of Aquatic Science and Technology, Kastanienbaum, Switzerland Synonyms Methanotrophy Definition Methane oxidation is a microbial metabolic process for energy generation and carbon assimilation from methane that is carried out by specific

Wehrli, Bernhard

13

Nitrous Oxide Nitrous oxide (chemical formula N2O), is a trace gas in Earth's atmosphere, with a  

E-Print Network [OSTI]

fuel, biomass and biofuel, and industrial processes. Nitrous oxide emissions related to biofuel, the Global Warming Potential (GWP) is a more useful quantity. The GWP of N2O is the time- integrated radiative forcing following a 1 kg pulse emission of N2O, relative to the same quantity following a 1 kg

14

E-Print Network 3.0 - anesthetic nitrous oxide Sample Search...  

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

such concentrations of anesthetics are safe... ), hypoxemia (eg, nitrogen and carbon monoxide), addiction (eg, nitrous oxide), or health effects resulting... from chronic exposure...

15

Sandia National Laboratories: reduce nitrous oxides pollution  

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 the1developmentturbineredox-active perovskite oxide High-Efficiencynitrous oxides

16

TITLE: Effects of Nitrogen Fertilizer Types and Rates and Irrigation on Nitrous Oxide Fluxes in Turfgrass  

E-Print Network [OSTI]

1). The effects of drought were also evident in clippings biomass, which was 61 to 70% less in dry28 TITLE: Effects of Nitrogen Fertilizer Types and Rates and Irrigation on Nitrous Oxide Fluxes in concentrations of atmospheric nitrous oxide (N2O), a greenhouse gas, and agriculture is considered a significant

17

A method for measuring methane oxidation rates using low levels of 14C-labeled methane and accelerator mass spectrometry  

E-Print Network [OSTI]

the anaerobic oxidation of methane. Environ. Microbiol. 10(Field observations of methane concentra- tions and oxidationAnaerobic oxidation of methane above gas hydrates at Hydrate

2011-01-01T23:59:59.000Z

18

Biogeochemical controls and isotopic signatures of nitrous oxide production by a marine ammonia-oxidizing bacterium  

E-Print Network [OSTI]

Nitrous oxide (N2O)[N subscript 2 O] is a trace gas that contributes to the greenhouse effect and stratospheric ozone depletion. The N2O [N subscript 2 O] yield from nitrification (moles N2O-N [N subscript 2 O - N] produced ...

Frame, Caitlin H.

19

On-farm Assessment of Nitrogen Fertilizer application to corn on Nitrous Oxide Emissions  

E-Print Network [OSTI]

mitigation of greenhouse gas emissions by agriculture. Nutr.1998. Nitrous oxide emission in three years as affected by2008. Soil-surface gas emissions. p.851-861. In: M.R. Carter

2009-01-01T23:59:59.000Z

20

Methane oxidation associated with submerged brown mosses reduces methane emissions from Siberian  

E-Print Network [OSTI]

Methane oxidation associated with submerged brown mosses reduces methane emissions from Siberian, University of Hamburg, Allende-Platz 2, 20146 Hamburg, Germany Summary 1. Methane (CH4) oxidation to Sphagnum species and low-pH peatlands. 2. Moss-associated methane oxidation (MAMO) can be an effective

Wehrli, Bernhard

Note: This page contains sample records for the topic "methane nitrous oxide" 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

Selective methane oxidation over promoted oxide catalysts. Quarterly report, March--May 1995  

SciTech Connect (OSTI)

The objective of this research is the selective oxidative coupling of methane to C{sub 2}H{sub 4} hydrocarbons and oxygenates, in particular formaldehyde and methanol. Air, oxygen or carbon dioxide, rather than nitrous oxide will be utilized as the oxidizing gas at high gas hourly space velocity, but mild reaction conditions (500-700 {degrees}C, 1 atm total pressure). All the investigated processes are catalytic, aiming at minimizing gas phase reactions that are difficult to control. The research is divided into the following three tasks: (1) maximizing selective methane oxidation to C{sub 2}H{sub 4} products over promoted Sr/La{sub 2}O{sub 3}; (2) selective methane oxidation to oxygenates; and (3) catalyst characterization and optimization. Task 1 dealt with the preparation, testing, and optimization of acidic promoted lanthana-based catalysts for the synthesis of C{sub 2}H{sub 4} hydrocarbons and is essentially completed. Task 2 aims at the formation and optimization of promoted catalysts for the synthesis of oxygenates, in particular formaldehyde and methanol. Task 3 involves characterization of the most promising catalysts so that optimization can be achieved under Task 2. Accomplishments for this period are presented.

Klier, K.; Herman, R.G.; Wang, Chaun-Bao; Shi, Chunlei; Sun, Qun

1995-08-01T23:59:59.000Z

22

Anaerobic Methane Oxidation in a Landfill-Leachate Plume  

E-Print Network [OSTI]

Anaerobic Methane Oxidation in a Landfill-Leachate Plume E T H A N L . G R O S S M A N , * , L U I, and methane, and (2) negligible oxygen, nitrate, and sulfate concentrations. Methane concentrations and stable carbon isotope (13C) values suggest anaerobic methane oxidation was occurring within the plume and at its

Grossman, Ethan L.

23

Nitrous Oxide Fluxes from the Gulf of Mexico "Dead Zone" Primary Investigator: Craig Stow -NOAA GLERL  

E-Print Network [OSTI]

forecasts require accurate estimates of greenhouse gas emission rates. Currently, there are few measurements Management Research Laboratory Overview Nitrous oxide is a potent greenhouse gas with a global warming oxide is a potent greenhouse gas with a global warming potential ~300 times that of carbon dioxide

24

Methane oxidation over dual redox catalysts  

SciTech Connect (OSTI)

Catalytic oxidation of methane to partial oxidation products, primarily formaldehyde and C[sub 2] hydrocarbons, was found to be directed by the catalyst used. In this project, it was discovered that a moderate oxidative coupling catalyst for C[sub 2] hydrocarbons, zinc oxide, is modified by addition of small amounts of Cu and Fe dopants to yield fair yields of formaldehyde. A similar effect was observed with Cu/Sn/ZnO catalysts, and the presence of a redox Lewis acid, Fe[sup III] or Sn[sup IV], was found to be essential for the selectivity switch from C[sub 2] coupling products to formaldehyde. The principle of double doping with an oxygen activator (Cu) and the redox Lewis acid (Fe, Sn) was pursued further by synthesizing and testing the CuFe-ZSM-5 zeolite catalyst. The Cu[sup II](ion exchanged) Fe[sup III](framework)-ZSM-5 also displayed activity for formaldehyde synthesis, with space time yields exceeding 100 g/h-kg catalyst. However, the selectivity was low and earlier claims in the literature of selective oxidation of methane to methanol over CuFe-ZSM-5 were not reproduced. A new active and selective catalytic system (M=Sb,Bi,Sn)/SrO/La[sub 2]O[sub 3] has been discovered for potentially commercially attractive process for the conversion of methane to C[sub 2] hydrocarbons, (ii) a new principle has been demonstrated for selectivity switching from C[sub 2] hydrocarbon products to formaldehyde in methane oxidations over Cu,Fe-doped zinc oxide and ZSM-5, and (iii) a new approach has been initiated for using ultrafine metal dispersions for low temperature activation of methane for selective conversions. Item (iii) continues being supported by AMOCO while further developments related to items (i) and (ii) are the objective of our continued effort under the METC-AMOCO proposed joint program.

Klier, K.; Herman, R.G.; Sojka, Z.; DiCosimo, J.I.; DeTavernier, S.

1992-06-01T23:59:59.000Z

25

CARBON SEQUESTRATION IN ARABLE SOILS IS LIKELY TO INCREASE NITROUS OXIDE EMISSIONS, OFFSETTING  

E-Print Network [OSTI]

CARBON SEQUESTRATION IN ARABLE SOILS IS LIKELY TO INCREASE NITROUS OXIDE EMISSIONS, OFFSETTING in strategies for climate protection. 1. Introduction Carbon sequestration has been highlighted recently concentration of carbon dioxide (CO2) in the atmo- sphere include sequestering carbon (C) in soils

26

ESTIMATING METHANE EMISSION AND OXIDATION FROM TWO TEMPORARY  

E-Print Network [OSTI]

ESTIMATING METHANE EMISSION AND OXIDATION FROM TWO TEMPORARY COVERS ON LANDFILLED MBT TREATED WASTE to oxidize the methane flux coming from the residual organic fraction. The first plant was operated without recovery of organic fraction and with concentration of the fine fraction in a cell. The methane fluxes were

Paris-Sud XI, Université de

27

Nitrous oxide (N?O) isotopic composition in the troposphere : instrumentation, observations at Mace Head, Ireland, and regional modeling  

E-Print Network [OSTI]

Nitrous oxide (N?O) is a significant greenhouse gas and main contributor to stratospheric ozone destruction. Surface measurements of N?O mole fractions have been used to attribute source and sink strengths, but large ...

Potter, Katherine Ellison

2011-01-01T23:59:59.000Z

28

A method for measuring methane oxidation rates using low levels of 14C-labeled methane and accelerator mass spectrometry  

E-Print Network [OSTI]

oxidation of methane above gas hydrates at Hydrate Ridge, NEsediment from a marine gas hydrate area. Environ. Microbiol.

2011-01-01T23:59:59.000Z

29

Modelling of silicon oxynitridation by nitrous oxide using the reaction rate approach  

SciTech Connect (OSTI)

Large technological progress in oxynitridation processing leads to the introduction of silicon oxynitride as ultra-thin gate oxide. On the theoretical side, few studies have been dedicated to the process modelling of oxynitridation. Such an objective is a considerable challenge regarding the various atomistic mechanisms occurring during this fabrication step. In this article, some progress performed to adapt the reaction rate approach for the modelling of oxynitride growth by a nitrous ambient are reported. The Ellis and Buhrman's approach is used for the gas phase decomposition modelling. Taking into account the mass balance of the species at the interface between the oxynitride and silicon, a minimal kinetic model describing the oxide growth has been calibrated and implemented. The influence of nitrogen on the reaction rate has been introduced in an empirical way. The oxidation kinetics predicted with this minimal model compares well with several experiments.

Dominique Krzeminski, Christophe, E-mail: christophe.krzeminski@isen.fr [Dpartment ISEN, IEMN-UMR-8520, 41 Boulevard Vauban, 59046 Lille Cedex (France)

2013-12-14T23:59:59.000Z

30

TITLE: Emissions of Nitrous Oxide from Three Different Turfgrass Species and from Perennial Ryegrass under Different Irrigation Regimes  

E-Print Network [OSTI]

80 TITLE: Emissions of Nitrous Oxide from Three Different Turfgrass Species and from Perennial). effects of irrigation on N2 O emissions from perennial ryegrass AUTHOR: Jason Lewis and Dale Bremer and frequencies, and irrigated with different amounts of water, all of which may affect N2 O emissions

31

New constraints on methane fluxes and rates of anaerobic methane oxidation in a Gulf of Mexico brine pool via in situ mass spectrometry  

E-Print Network [OSTI]

New constraints on methane fluxes and rates of anaerobic methane oxidation in a Gulf of Mexico Keywords: Methane flux Mass spectrometer Brine pool Methane oxidation Gulf of Mexico a b s t r a c t Deep heterogeneity. In particular, biogeochemical fluxes of volatiles such as methane remain largely unconstrained

Girguis, Peter R.

32

The oxidative dimerization of methane over promoted and unpromoted magnesium oxide monoliths  

E-Print Network [OSTI]

for the degree of MASTER OF SCIENCE May 1989 Major Subject: Chemistry THE OXIDATIVE DIMERIZATION OF METHANE OVER PROMOTED AND UNPROMOTED MAGNESIUM OxiDE MONOLITHS A Thesis by JANE MARIE AIGLER Approved as to style and content by: uns or (Chair of Commi... ee) os e (Member) nt ony (Member) a (Head of Department) May 1989 ABSTRACT The Oxidative Dimerization of Methane over Promoted and Unpromoted Magnesium Oxide Monoliths. (May 1989) Jane Marie Aigier, B. S. , Pennsylvania State University...

Aigler, Jane Marie

1989-01-01T23:59:59.000Z

33

Deep oxidation of methane on particles derived from YSZ-supported Pd-Pt-(O) coatings synthesized by pulsed filtered cathodic arc  

E-Print Network [OSTI]

2009) Deep oxidation of methane on particles derived fromAbstract Methane conversion tests were performed on Pd, PdOFigure captions Figure 1: Methane conversion a), methane

Horwat, D.

2009-01-01T23:59:59.000Z

34

Development of a Spectroscopic Technique for Continuous Online Monitoring of Oxygen and Site-Specific Nitrogen Isotopic Composition of Atmospheric Nitrous Oxide  

E-Print Network [OSTI]

Nitrous oxide is an important greenhouse gas and ozone-depleting-substance. Its sources are diffuse and poorly characterized, complicating efforts to understand anthropogenic impacts and develop mitigation policies. Online, ...

Harris, Eliza

35

Methane oxidation over dual redox catalysts. Final report  

SciTech Connect (OSTI)

Catalytic oxidation of methane to partial oxidation products, primarily formaldehyde and C{sub 2} hydrocarbons, was found to be directed by the catalyst used. In this project, it was discovered that a moderate oxidative coupling catalyst for C{sub 2} hydrocarbons, zinc oxide, is modified by addition of small amounts of Cu and Fe dopants to yield fair yields of formaldehyde. A similar effect was observed with Cu/Sn/ZnO catalysts, and the presence of a redox Lewis acid, Fe{sup III} or Sn{sup IV}, was found to be essential for the selectivity switch from C{sub 2} coupling products to formaldehyde. The principle of double doping with an oxygen activator (Cu) and the redox Lewis acid (Fe, Sn) was pursued further by synthesizing and testing the CuFe-ZSM-5 zeolite catalyst. The Cu{sup II}(ion exchanged) Fe{sup III}(framework)-ZSM-5 also displayed activity for formaldehyde synthesis, with space time yields exceeding 100 g/h-kg catalyst. However, the selectivity was low and earlier claims in the literature of selective oxidation of methane to methanol over CuFe-ZSM-5 were not reproduced. A new active and selective catalytic system (M=Sb,Bi,Sn)/SrO/La{sub 2}O{sub 3} has been discovered for potentially commercially attractive process for the conversion of methane to C{sub 2} hydrocarbons, (ii) a new principle has been demonstrated for selectivity switching from C{sub 2} hydrocarbon products to formaldehyde in methane oxidations over Cu,Fe-doped zinc oxide and ZSM-5, and (iii) a new approach has been initiated for using ultrafine metal dispersions for low temperature activation of methane for selective conversions. Item (iii) continues being supported by AMOCO while further developments related to items (i) and (ii) are the objective of our continued effort under the METC-AMOCO proposed joint program.

Klier, K.; Herman, R.G.; Sojka, Z.; DiCosimo, J.I.; DeTavernier, S.

1992-06-01T23:59:59.000Z

36

Anesthesia with halothane and nitrous oxide alters protein and amino acid metabolism in dogs  

SciTech Connect (OSTI)

General anesthesia in combination with surgery is known to result in negative nitrogen balance. To determine whether general anesthesia without concomitant surgery decreases whole body protein synthesis and/or increases whole body protein breakdown, two groups of dogs were studied: Group 1 (n = 6) in the conscious state and Group 2 (n = 8) during general anesthesia employing halothane (1.5 MAC) in 50% nitrous oxide and oxygen. Changes in protein metabolism were estimated by isotope dilution techniques employing simultaneous infusions of (4,53H)leucine and alpha-(1-14C)-ketoisocaproate (KIC). Total leucine carbon flux was unchanged or slightly increased in the anesthetized animals when compared to the conscious controls, indicating only a slight increase in the rate of proteolysis. However, leucine oxidation was increased (P less than 0.001) by more than 80% in the anesthetized animals when compared with their conscious controls, whereas whole body nonoxidative leucine disappearance, an indicator of whole body protein synthesis, was decreased. The ratio of leucine oxidation to the nonoxidative rate of leucine disappearance, which provides an index of the catabolism of at least one essential amino acid in the postabsorptive state, was more than twofold increased (P less than 0.001) in the anesthetized animals regardless of the tracer employed. These studies suggest that the administration of anesthesia alone, without concomitant surgery, is associated with a decreased rate of whole body protein synthesis and increased leucine oxidation, resulting in increased leucine and protein catabolism, which may be underlying or initiating some of the protein wasting known to occur in patients undergoing surgery.

Horber, F.F.; Krayer, S.; Rehder, K.; Haymond, M.W.

1988-09-01T23:59:59.000Z

37

Regional Sources of Nitrous Oxide over the United States: Seasonal Variation and Spatial Distribution  

SciTech Connect (OSTI)

This paper presents top-down constraints on the magnitude, spatial distribution, and seasonality of nitrous oxide (N{sub 2}O) emissions over the central United States. We analyze data from tall towers in 2004 and 2008 using a high resolution Lagrangian particle dispersion model paired with both geostatistical and Bayesian inversions. Our results indicate peak N{sub 2}O emissions in June with a strong seasonal cycle. The spatial distribution of sources closely mirrors data on fertilizer application with particularly large N{sub 2}O sources over the US Cornbelt. Existing inventories for N{sub 2}O predict emissions that differ substantially from the inverse model results in both seasonal cycle and magnitude. We estimate a total annual N{sub 2}O budget over the central US of 0.9-1.2 TgN/yr and an extrapolated budget for the entire US and Canada of 2.1-2.6 TgN/yr. By this estimate, the US and Canada account for 12-15% of the total global N{sub 2}O source or 32-39% of the global anthropogenic source as reported by the Intergovernmental Panel on Climate Change in 2007.

Miller, S. M.; Kort, E. A.; Hirsch, A. I.; Dlugokencky, E. J.; Andrews, A. E.; Xu, X.; Tian, H.; Nehrkorn, T.; Eluszkiewicz, J.; Michalak, A. M.; Wofsy, S. C.

2012-01-01T23:59:59.000Z

38

Direct oxidation of hydrocarbons in a solid oxide fuel cell. I. Methane oxidation  

SciTech Connect (OSTI)

The performance of Cu cermets as anodes for the direct oxidation of CH{sub 4} in solid oxide fuel cells was examined. Mixtures of Cu and yttria-stabilized zirconia (YAZ) were found to give similar performance to Ni-YSZ cermets when H{sub 2} was used as the fuel, but did not deactivate in dry CH{sub 4}. While Cu-YSZ was essentially inert to methane, the addition of ceria to the anode gave rise to reasonable power densities and stable operation over a period of at least 3 days. Proof of direct oxidation of CH{sub 4} came from chemical analysis of the products leaving the cell. The major carbon-containing product was CO{sub 2}, with only traces of CO observed, and there was excellent agreement between the actual cell current and that predicted by the methane conversion. These results demonstrate that direct, electrocatalytic oxidation of dry methane is possible, with reasonable performance.

Park, S.; Craciun, R.; Vohs, J.M.; Gorte, R.J.

1999-10-01T23:59:59.000Z

39

Anaerobic methane oxidation in metalliferous hydrothermal sediments: influence on carbon flux and  

E-Print Network [OSTI]

Anaerobic methane oxidation in metalliferous hydrothermal sediments: influence on carbon flux of Georgia, Athens, GA 30602-3636, USA. Summary The anaerobic oxidation of methane (AOM) is a glo- bally significant sink that regulates methane flux from sediments into the oceans and atmosphere. Here we examine

Girguis, Peter R.

40

Novel Methane, Ethane, and Propane Oxidizing Bacteria at Marine Hydrocarbon Seeps Identified by Stable Isotope Probing  

E-Print Network [OSTI]

Novel Methane, Ethane, and Propane Oxidizing Bacteria at Marine Hydrocarbon Seeps Identified by Stable Isotope Probing Running Title: Novel Methane, Ethane, and Propane Oxidizing Bacteria Section incubating sediment with 13 C-labeled methane, ethane, or propane, we5 confirmed the incorporation of 13 C

Sessions, Alex L.

Note: This page contains sample records for the topic "methane nitrous oxide" 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

OXIDATIVE COUPLING OF METHANE USING INORGANIC MEMBRANE REACTORS  

SciTech Connect (OSTI)

The objective of this research is to study the oxidative coupling of methane in catalytic inorganic membrane reactors. A specific target is to achieve conversion of methane to C{sub 2} hydrocarbons at very high selectivity and higher yields than in conventional non-porous, co-feed, fixed bed reactors by controlling the oxygen supply through the membrane. A membrane reactor has the advantage of precisely controlling the rate of delivery of oxygen to the catalyst. This facility permits balancing the rate of oxidation and reduction of the catalyst. In addition, membrane reactors minimize the concentration of gas phase oxygen thus reducing non selective gas phase reactions, which are believed to be a main route for the formation of CO{sub x} products. Such gas phase reactions are a cause of decreased selectivity in the oxidative coupling of methane in conventional flow reactors. Membrane reactors could also produce higher product yields by providing better distribution of the reactant gases over the catalyst than the conventional plug flow reactors. Membrane reactor technology also offers the potential for modifying the membranes both to improve catalytic properties as well as to regulate the rate of the permeation/diffusion of reactants through the membrane to minimize by-product generation. Other benefits also exist with membrane reactors, such as the mitigation of thermal hot-spots for highly exothermic reactions such as the oxidative coupling of methane. The application of catalytically active inorganic membranes has potential for drastically increasing the yield of reactions which are currently limited by either thermodynamic equilibria, product inhibition, or kinetic selectivity.

Dr. Y.H. Ma; Dr. W.R. Moser; Dr. A.G. Dixon; Dr. A.M. Ramachandra; Dr. Y. Lu; C. Binkerd

1998-04-01T23:59:59.000Z

42

Evidence for methane oxidation in rumen fluid in vitro C Valds CJ Newbold K Hillman RJ Wallace  

E-Print Network [OSTI]

Evidence for methane oxidation in rumen fluid in vitro C Valdés CJ Newbold K Hillman RJ Wallace 1 that methane oxidation also occurs. Methane- utilising bacteria were isolated from the rumen (Stock and Mc undertaken to evaluate the extent of methane oxidation in rumen fluid in vitro. Rumen fluid was obtained from

Paris-Sud XI, Université de

43

Partial oxidation of methane to syngas in different reactor types  

SciTech Connect (OSTI)

The performance of Rh/ZnO/{gamma}-Al{sub 2}O{sub 3} catalyst for partial oxidation of methane to syngas was compared in fixed and fluidised bed reactors. Catalyst activity was found not to be a limiting factor under any experimental conditions and complete oxygen conversions were observed in all tests. In the fixed bed reactor both methane conversion and syngas selectivity were increasing with space velocity as the result of an autothermal effect. Satisfactory control of the catalyst temperature at high space velocities could only be achieved with addition of inert diluent or steam to the feed. Different conversion and selectivity patterns were observed in fluidised bed reactor. Methane conversion and carbon monoxide selectivity were decreasing with increasing gas flow. By contrast, hydrogen selectivity showed distinct maximum at medium space velocities. These results are interpreted in terms of catalyst backmixing and its effect on primary and secondary reactions. Improved temperature control was also achieved in fluidised bed reactor. Several experiments using fluidised bed reactor were carried out at elevated pressures. To eliminate the occurrence of non-catalytic gas phase reactions between methane and oxygen very short feed mixing times (< 1 ms) were employed. Despite these measures the reactor could not be successfully operated at pressures above 0.7 MPa. The implications of these findings for process development are discussed.

Lapszewicz, J.A.; Campbell, I.; Charlton, B.G.; Foulds, G.A. [CSIRO Division of Coal and Energy Technology, Menai (Australia)

1995-12-01T23:59:59.000Z

44

E-Print Network 3.0 - anaerobic methane-oxidizing community Sample...  

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

development objectives. CH4 recovered aerobic methane oxidation: methanotrophs in cover soils... -to-energy ...601 10.4.4 Biological...

45

Department of Earth and Mineral Engineering Spring 2011 Oxidative Coupling of Methane Reactor  

E-Print Network [OSTI]

PENNSTATE Department of Earth and Mineral Engineering Spring 2011 Oxidative Coupling of Methane of an experimental reactor designed to couple methane to ethane and dehydrogenate ethane to ethylene. The reactor and build the reactor and perform methane conversion testing to provide proof of concept for the OCM

Demirel, Melik C.

46

Cu- and Ag-modified cerium oxide catalysts for methane oxidation  

SciTech Connect (OSTI)

The catalytic activity of nanocrystalline doped ceria and Cu- and Ag-modified ceria for the complete oxidation of methane was studied in this work. The catalyst structure was studied by X-ray diffraction (XRD) and related to the availability of low-temperature oxygen species. Selected samples were also analyzed by STEM/EDX, HRTEM, and XPS. Temperature-programmed reduction (TPR) by H{sub 2} and CH{sub 4}, as well as oxygen chemisorption, measurements were used to characterize the different oxygen species present on the catalyst. La and Zr were used as dopants to modify the crystal size and reduction properties of ceria. Enhanced activity for the complete oxidation of methane is discussed in terms of ceria reducibility, crystal size, and formation of oxygen defects at the surface (extrinsic oxygen vacancies). Addition of transition metal oxides (CuO) or transition metals (Ag) improves the low-temperature oxidation activity of cerium oxide. The interaction of ceria with Ag and CuO is a strong function of the crystal size of ceria. In the presence of the transition metal or metal oxide, a small crystal size of ceria favors the formation of highly reducible oxygen species and enhances the methane oxidation activity.

Kundakovic, L.; Flytzani-Stephanopoulis, M. [Tufts Univ., Medford, MA (United States). Dept. of Chemical Engineering] [Tufts Univ., Medford, MA (United States). Dept. of Chemical Engineering

1998-10-01T23:59:59.000Z

47

Regional-Scale Assessment of Nitrous Oxide Emissions within the US Corn Belt: The Impact of Precipitation and Agricultural Drainage on Indirect Emissions  

E-Print Network [OSTI]

Regional-Scale Assessment of Nitrous Oxide Emissions within the US Corn Belt: The Impact of Precipitation and Agricultural Drainage on Indirect Emissions Tim Griffis1, Xuhui Lee2, John Baker3, Peter, but mitigation strategies have been limited by the large uncertainties in both direct and indirect emission

Minnesota, University of

48

Combined Steam Reforming and Partial Oxidation of Methane to Synthesis Gas under Electrical Discharge  

E-Print Network [OSTI]

Combined Steam Reforming and Partial Oxidation of Methane to Synthesis Gas under Electrical production from simultaneous steam reforming and partial oxidation of methane using an ac corona discharge production has been steam reforming, shown in reaction 4. It is very useful to use low-cost materials

Mallinson, Richard

49

Selective methane oxidation over promoted oxide catalysts. Topical report, September 8, 1992--September 7, 1996  

SciTech Connect (OSTI)

The objective of this research was to selectively oxidize methane to C{sub 2} hydrocarbons and to oxygenates, in particular formaldehyde and methanol, in high space time yields using air at the oxidant under milder reaction conditions that heretofore employed over industrially practical oxide catalysts. The research carried out under this US DOE-METC contract was divided into the following three tasks: Task 1, maximizing selective methane oxidation to C{sub 2}{sup +} products over promoted SrO/La{sub 2}O{sub 3} catalysts; Task 2, selective methane oxidation to oxygenates; and Task 3, catalyst characterization and optimization. Principal accomplishments include the following: the 1 wt% SO{sub 4}{sup 2{minus}}/SrO/La{sub 2}O{sub 3} promoted catalyst developed here produced over 2 kg of C{sub 2} hydrocarbons/kg catalyst/hr at 550 C; V{sub 2}O{sub 5}/SiO{sub 2} catalysts have been prepared that produce up to 1.5 kg formaldehyde/kg catalyst/hr at 630 C with low CO{sub 2} selectivities; and a novel dual bed catalyst system has been designed and utilized to produce over 100 g methanol/kg catalyst/hr at 600 C with the presence of steam in the reactant mixture.

Klier, K.; Herman, R.G.

1996-12-31T23:59:59.000Z

50

Synthesis Gas Production from Partial Oxidation of Methane with Air in AC Electric Gas Discharge  

E-Print Network [OSTI]

Synthesis Gas Production from Partial Oxidation of Methane with Air in AC Electric Gas Discharge K 73019 Received October 11, 2002 In this study, synthesis gas production in an AC electric gas discharge of methane and air mixtures at room temperature and ambient pressure was investigated. The objective

Mallinson, Richard

51

Oxidation Reactions Performed by Soluble Methane Monooxygenase Hydroxylase Intermediates H[subscript peroxo] and Q Proceed by Distinct Mechanisms  

E-Print Network [OSTI]

Soluble methane monooxygenase is a bacterial enzyme that converts methane to methanol at a carboxylate-bridged diiron center with exquisite control. Because the oxidizing power required for this transformation is demanding, ...

Tinberg, Christine E.

52

Formation of ozone and oxidation of methane in a direct current corona discharge  

E-Print Network [OSTI]

FORMATION OF OZONE AND OXIDATION OF METHANE IN A DIRECT CURRENT CORONA DISCHARGE A Thesis by UMASHANKER TANGIRALA Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE May 1976 Major Subject: Chemical Engineering FORMATION OF OZONE AND OXIDATION OF METHANE IN A DIRECT CURRENT CORONA DISCHARGE A Thesis by UMASHANKER TANGIRALA Approved as to style and content by: (Chairman of Committee) ( ad of Department...

Tangirala, Umashanker

1976-01-01T23:59:59.000Z

53

Determination of the Equilibrium Composition of the Product Mixture in the Reaction of Oxidizing Ammonolysis of Methane  

E-Print Network [OSTI]

Ammonolysis of Methane By Nikolai V. Trusov, Oleg V. Prezhdo, Grigorii I. Gryn, and Victor V. Prezhdo ammonolysis of methane (OAM). It is shown that the composition crucially depends on the number formation by the oxidizing ammonolysis of methane (OAM) severely impedes investigation of the corresponding

54

Journal of Molecular Catalysis A: Chemical 259 (2006) 296301 Pt-catalyzed oxidative carbonylation of methane to  

E-Print Network [OSTI]

of methane to acetic acid in sulfuric acid Mark Zerella, Alexis T. Bell Department of Chemical Engineering carbonylation of methane to acetic acid was investigated using Pt(II) cations as the catalyst and sulfuric acid Elsevier B.V. All rights reserved. Keywords: Methane; Acetic acid; Platinum; Sulfuric acid; Oxidative

Bell, Alexis T.

55

Direct oxidation of methane to acetic acid catalyzed by Pd2+ and Cu2+ in the presence of molecular oxygen  

E-Print Network [OSTI]

Direct oxidation of methane to acetic acid catalyzed by Pd2+ and Cu2+ in the presence of molecular published as an Advance Article on the web 3rd August 2004 Methane is catalytically converted primarily. The conversion of methane to acetic acid has attracted recent interest as a pathway for the synthesis

Bell, Alexis T.

56

Effect of adding nitrogen on the yield of hydrogen cyanide in oxidative ammonolysis of methane  

SciTech Connect (OSTI)

On the basis of an empirical model of the process of oxidative ammonolysis of methane, a study was made of the effect of adding nitrogen to the initial methane-ammonia-air mixture. In the general case, the N{sub 2} introduction was shown to decrease the autothermal temperature of the synthesis, though at small flows of the initial mixture some increase in t{sub conv} is possible. An explanation of this phenomenon was proposed.

Grin, G.I.; Trusov, N.V.; Dmitriev, N.M.

1994-02-20T23:59:59.000Z

57

Methane Oxidation to Methanol without CO2 Emission: Catalysis by Atomic Negative Ions  

E-Print Network [OSTI]

The catalytic activities of the atomic Y-, Ru-, At-, In-, Pd-, Ag-, Pt-, and Os- ions have been investigated theoretically using the atomic Au- ion as the benchmark for the selective partial oxidation of methane to methanol without CO2 emission. Dispersion-corrected density-functional theory has been used for the investigation. From the energy barrier calculations and the thermodynamics of the reactions, we conclude that the catalytic effect of the atomic Ag-, At-, Ru-, and Os- ions is higher than that of the atomic Au- ion catalysis of CH4 conversion to methanol. By controlling the temperature around 290K (Os-), 300K (Ag-), 310K (At-), 320K (Ru-) and 325K (Au-) methane can be completely oxidized to methanol without the emission of CO2. We conclude by recommending the investigation of the catalytic activities of combinations of the above negative ions for significant enhancement of the selective partial oxidation of methane to methanol.

Tesfamichael, Aron; Felfli, Zineb; Msezane, Alfred Z

2014-01-01T23:59:59.000Z

58

Anaerobic Methane Oxidation in a Landfill-Leachate Plume  

E-Print Network [OSTI]

wells ranging in depth from 1.3 to 11 m that were oriented parallel to the flow path. The center of the leachate plume was characterized by (1) high alkalinity and elevated concentrations of total dissolved organic carbon, reduced iron, and methane...

Grossman, E. L.; Cifuentes, L. A.; Cozzarelli, I. M.

2002-01-01T23:59:59.000Z

59

Methane-to-Methanol Conversion by Gas-Phase Transition Metal Oxide Cations: Experiment and Theory  

E-Print Network [OSTI]

Methane-to-Methanol Conversion by Gas-Phase Transition Metal Oxide Cations: Experiment and Theory Ricardo B. Metz Department of Chemistry, University of Massachusetts, Amherst, MA 01003 USA Abstract Gas such as methanol has attracted great experimental and theoretical interest due to its importance as an industrial

Metz, Ricardo B.

60

Total oxidation of carbon monoxide and methane over transition metal-fluorite oxide composite catalysts. I. Catalyst composition and activity  

SciTech Connect (OSTI)

A novel metal oxide composite catalyst for the total oxidation of carbon monoxide and methane was prepared by combining fluorite oxides with active transition metals. The fluorite oxides, such as ceria and zirconia, are oxygen-ion-conducting materials having catalytic properties usually at high temperatures. Active base metal catalysts, such as copper, were used as additives to promote the catalytic properties of these oxides. The contact of the two types of materials gave rise to a high active oxidation catalyst. At a space velocity of about 42,000 h{sup {minus}1}, complete carbon monoxide oxidation in air occurred at room temperature on the Au{sub 0.05}[Ce(La)]{sub 0.95}L{sub x} catalyst and at ca. 100{degrees}C on Cu-Ce-O composite catalysts. At the same space velocity, total oxidation of methane on the Cu-Ce-O catalyst doped with La{sub 2}O{sub 3} or SrO took place at ca. 550{degrees}C. The specific carbon monoxide oxidation activity of the Cu-Ce-O catalyst was several orders of magnitude higher than that of conventional copper-based catalysts and comparable or superior to platinum catalysts. This type of composite catalyst also showed excellent resistance to water vapor poisoning. The enhanced catalyst activity and stability resulted from strong interaction of the transition metal and fluorite oxide materials. 44 refs., 14 figs., 5 tabs.

Liu, W.; Flytzani-Stephanopoulos, F. [Tufts Univ., Medford, MA (United States)] [Tufts Univ., Medford, MA (United States)

1995-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "methane nitrous oxide" 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

Homogeneous Catalysis Selective Oxidation of Methane to Methanol  

E-Print Network [OSTI]

oxidizing agent than SVI ions (Eo = 1.5 V SeO4 2 /H2SeO3, Eo = 0.17 V SO4 2 /H2SO3, respec- tively) and, critically, the hydrated form, selenic acid (H2SeO4), is known to oxidize gold metal.[7] Equally impor- tant

Goddard III, William A.

62

Anaerobic oxidation of methane in an iron-rich Danish freshwater lake sediment Katrin a. Nori,a,* Bo Thamdrup,a and Carsten J. Schubert b  

E-Print Network [OSTI]

Anaerobic oxidation of methane in an iron-rich Danish freshwater lake sediment Katrin a´. Norði Freshwater systems are identified as one of the main natural methane sources, but little is known about the importance of anaerobic oxidation of methane (AOM) in these systems. We investigated AOM in a lake sediment

Wehrli, Bernhard

63

Methane Activation by Transition-Metal Oxides, MOx (M ) Cr, Mo, W; x ) 1, 2, 3) Xin Xu,# Francesco Faglioni, and William A. Goddard, III*  

E-Print Network [OSTI]

Methane Activation by Transition-Metal Oxides, MOx (M ) Cr, Mo, W; x ) 1, 2, 3) Xin Xu,# Francesco, 2002 Recent experiments on the dehydrogenation-aromatization of methane (DHAM) to form benzene using a MoO3/HZSM-5 catalyst stimulated us to examine methane activation by the transition-metal oxide

Goddard III, William A.

64

Non-covalent interactions of nitrous oxide with aromatic compounds: Spectroscopic and computational evidence for the formation of 1:1 complexes  

SciTech Connect (OSTI)

We present the first study of intermolecular interactions between nitrous oxide (N{sub 2}O) and three representative aromatic compounds (ACs): phenol, cresol, and toluene. The infrared spectroscopic experiments were performed in a Ne matrix and were supported by high-level quantum chemical calculations. Comparisons of the calculated and experimental vibrational spectra provide direct identification and characterization of the 1:1 N{sub 2}O-AC complexes. Our results show that N{sub 2}O is capable of forming non-covalently bonded complexes with ACs. Complex formation is dominated by dispersion forces, and the interaction energies are relatively low (about ?3 kcal mol{sup ?1}); however, the complexes are clearly detected by frequency shifts of the characteristic bands. These results suggest that N{sub 2}O can be bound to the amino-acid residues tyrosine or phenylalanine in the form of ? complexes.

Cao, Qian [Department of Chemistry, P.O. Box 55, University of Helsinki, Helsinki FI-00014 (Finland) [Department of Chemistry, P.O. Box 55, University of Helsinki, Helsinki FI-00014 (Finland); School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275 (China); Gor, Gennady Y., E-mail: ggor@princeton.edu [Department of Civil and Environmental Engineering, Princeton University, Princeton, New Jersey 08544 (United States); Krogh-Jespersen, Karsten [Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903 (United States)] [Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903 (United States); Khriachtchev, Leonid [Department of Chemistry, P.O. Box 55, University of Helsinki, Helsinki FI-00014 (Finland)] [Department of Chemistry, P.O. Box 55, University of Helsinki, Helsinki FI-00014 (Finland)

2014-04-14T23:59:59.000Z

65

Detailed modeling and laser-induced fluorescence imaging of nitric oxide in a NH3-seeded non-premixed methane/air flame  

E-Print Network [OSTI]

non-premixed methane/air flame John B. Bell, Marcus S. Day, Joseph F. Grcar Computing Sciences-induced fluorescence imaging of nitric oxide in a NH3-seeded non-premixed methane/air flame Abstract In this paper we study the formation of NO in laminar, nitrogen diluted methane diffusion flames that are seeded

Bell, John B.

66

Methyl Chloride from Direct Methane Partial Oxidation: A High-Temperature Shilov-Like Catalytic System  

SciTech Connect (OSTI)

The intention of this study is to demonstrate and evaluate the scientific and economic feasibility of using special solvents to improve the thermal stability of Pt-catalyst in the Shilov system, such that a high reaction temperature could be achieved. The higher conversion rate (near 100%) of methyl chloride from partial oxidation of methane under the high temperature ({approx} 200 C) without significant Pt0 precipitation has been achieved. High concentration of the Cl- ion has been identified as the key for the stabilization of the Pt-catalysts. H/D exchange measurements indicated that the over oxidation will occur at the elevated temperature, developments of the effective product separation processes will be necessary in order to rationalize the industry-visible CH4 to CH3Cl conversion.

Yongchun Tang; John (Qisheng) Ma

2012-03-23T23:59:59.000Z

67

Applied reaction dynamics: Efficient synthesis gas production via single collision partial oxidation of methane to CO on Rh,,111...  

E-Print Network [OSTI]

of the incident beam's translational energy, and approaches unity for energies greater than 1.3 eV. Comparison for methanol synthesis. One method is the direct partial oxidation of methane, CH4 + 1/2 O2 CO + 2H2. 1 This process has been extensively studied using high surface area supported Rh catalysts in flow reactors

Sibener, Steven

68

Biogeochemical modelling of anaerobic vs. aerobic methane oxidation in a meromictic crater lake (Lake Pavin, France)  

E-Print Network [OSTI]

Géosciences, 1A rue de la Férolerie, 45071 Orléans Cedex 2, France Abstract Methane is a powerful greenhouse gas and its concentration in the atmosphere has increased over the past decades. Methane produced

Boyer, Edmond

69

Dissociative Adsorption of Methane on Surface Oxide Structures of Pd-Pt Alloys Arezoo Dianat,*,,  

E-Print Network [OSTI]

/C ratio of methane, the heat of combustion per mole of generated CO2 is higher than for other fuels

Cuniberti, Gianaurelio

70

Development of a hydrogen generator for fuel cells based on the partial oxidation of methane  

SciTech Connect (OSTI)

As well known, the most acknowledged process for generation of hydrogen for fuel cells is based upon the steam reforming of methane or natural gas (SRM). The reaction is endothermic ({Delta}H{sub 298}= 206 kJ/mole) and high H{sub 2}O/CH{sub 4} ratios are required in order to limit coke formation at T higher than 1000 K. Moreover, it is a common practice that the process`s fuel economy is highly sensitive to proper heat fluxes and reactor design (tubular type) and to operational conditions. Efficient heat recovery can be accomplished only on large scale units (> 40,000 Nm{sup 3}/h), far from the range of interest of {open_quotes}on-site{close_quotes} fuel cells. Even if, to fit the needs of the fuel cell technology, medium sized external reforming units (50-200 Nm{sup 3} H{sub 2}/h) have been developed and/or planned for integration with both the first and the second generation fuel cells, amelioration in their heat recovery and efficiency is at the expense of an increased sophistication and therefore at higher per unit costs. In all cases, SRM requires an extra {open_quotes}fuel{close_quotes} supply (to substain the endothermicity of the reaction) in addition to stoichiometric requirements ({open_quotes}feed{close_quotes} gas). A valid alternative could be a process based on catalytic partial oxidation of CH{sub 4} (CSPOM), since the process is mildly exothermic ({Delta}H{sub 298}= -35.6 kJ/mole) and therefore not energy intensive. Consequently, great interest is expected from conversion of methane into syngas, if an autothermal, low energy intensive, compact and reliable process could be developed.

Recupero, V.; Torre, T.; Saija, G.; Fiordano, N. [Institute CNR-TAE, Lucia, Messina (Italy)

1996-12-31T23:59:59.000Z

71

Nitrogen Oxides in the Nocturnal Boundary Layer: Chemistry of Nitrous Acid (HONO) and the Nitrate Radical (N03)  

SciTech Connect (OSTI)

Summary Chemical processes occurring at night in the lowest part of the urban atmosphere, the so called nocturnal boundary layer (NBL), can influence the composition of the atmosphere during the night as well as the following day. They may impact the budgets of some of the most important pollutants, such as ozone and nitrogen oxides, as well as influence size and composition of particular matter. Few studies have thus far concentrated on the nocturnal chemistry of the urban NBL, most likely due to the strong influence of vertical transport and mixing, which requires the measurement of trace gas profiles instead of simple point observations. Motivated by our lack of observations and understanding of nocturnal chemistry, the focus of this project was the study of the vertical distribution of trace gases and the altitude dependence of nocturnal chemistry under polluted conditions through field observations and modeling studies. The analysis of three field experiments (TEXAQS, Houston, 2000; Phoenix Sunrise Ozone Experiment, 2001; NAPOX, Boston, 2002), two of which were performed in this project, showed that ozone concentrations typically increase with height in the lowest 150m, while NO2 typically decreases. NO3, the dominant nocturnal radical species, showed much higher concentrations in the upper part of the NBL, and was often not present at the ground. With the help of a one-dimensional chemical transport model, developed in this project, we found that the interaction of ground emissions of NOx and hydrocarbons, together with their vertical transport, is responsible for the vertical profiles. The dominant chemical reactions influencing ozone, NO2 and NO3 are the reaction of ozone and NO3 with freshly emitted NO. Sensitivity studies with our model showed that the magnitude of the trace gas gradients depend both on the emission rates and the vertical stability of the NBL. Observations and model analysis clearly show that nocturnal chemistry in urban areas is altitude dependent. Measurements at one altitude, for example at the ground, where most air quality monitoring stations are located, are not representative for the rest of the NBL. Our model also revealed that radical chemistry is, in general, altitude dependent at night. We distinguish three regions: an unreactive, NO rich, ground layer; an upper, O3 and NO3 dominated layer, and a reactive mixing layer, where RO2 radicals are mixed from aloft with NO from the ground. In this reactive layer an active radical chemistry and elevated OH radical levels can be found. The downward transport of N2O5 and HO2NO2, followed by their thermal decay, was also identified as a radical source in this layer. Our observations also gave insight into the formation of HONO in the NBL. Based on our field experiments we were able to show that the NO2 to HONO conversion was relative humidity dependent. While this fact was well known, we found that it is most likely the uptake of HONO onto surfaces which is R.H. dependent, rather than the NO2 to HONO conversion. This finding led to the proposal of a new NO2 to HONO conversion mechanism, which is based on solid physical chemical principles. Noteworthy is also the observation of enhanced NO2 to HONO conversion during a dust storm event in Phoenix. The final activity in our project investigated the influence of the urban canopy, i.e. building walls and surfaces, on nocturnal chemistry. For the first time the surface area of a city was determined based on a Geographical Information System database of the city of Santa Monica. The surface to volume areas found in this study showed that, in the 2 lower part of the NBL, buildings provide a much larger surface area than the aerosol. In addition, buildings take up a considerable amount of the volume near the ground. The expansion of our model and sensitivity studies based on the Santa Monica data revealed that the surface area of buildings considerably influences HONO levels in urban areas. The volume reduction leads to a decrease of O3 and an increase of NO2 near the ground due to the stronger impact o

Jochen Stutz

2005-05-24T23:59:59.000Z

72

5, 23052341, 2008 Anaerobic methane  

E-Print Network [OSTI]

BGD 5, 2305­2341, 2008 Anaerobic methane oxidation in Black Sea sediments N. J. Knab et al. Title of Biogeosciences Regulation of anaerobic methane oxidation in sediments of the Black Sea N. J. Knab1 , B. A. Cragg2­2341, 2008 Anaerobic methane oxidation in Black Sea sediments N. J. Knab et al. Title Page Abstract

Paris-Sud XI, Université de

73

Geochemical, metagenomic and metaproteomic insights into trace metal utilization by methane-oxidizing microbial consortia in sulfidic marine sediments  

SciTech Connect (OSTI)

Microbes have obligate requirements for trace metals in metalloenzymes that catalyze important biogeochemical reactions. In anoxic methane- and sulfide-rich environments, microbes may have unique adaptations for metal acquisition and utilization due to decreased bioavailability as a result of metal sulfide precipitation. However, micronutrient cycling is largely unexplored in cold ( 10 C) and sulfidic (>1 mM H2S) deep-sea methane seep ecosystems. We investigated trace metal geochemistry and microbial metal utilization in methane seeps offshore Oregon and California, USA, and report dissolved concentrations of nickel (0.5-270 nM), cobalt (0.5-6 nM), molybdenum (10-5,600 nM) and tungsten (0.3-8 nM) in Hydrate Ridge sediment porewaters. Despite low levels of cobalt and tungsten, metagenomic and metaproteomic data suggest that microbial consortia catalyzing anaerobic oxidation of methane utilize both scarce micronutrients in addition to nickel and molybdenum. Genetic machinery for cobalt-containing vitamin B12 biosynthesis was present in both anaerobic methanotrophic archaea (ANME) and sulfate-reducing bacteria (SRB). Proteins affiliated with the tungsten-containing form of formylmethanofuran dehydrogenase were expressed in ANME from two seep ecosystems, the first evidence for expression of a tungstoenzyme in psychrotolerant microorganisms. Finally, our data suggest that chemical speciation of metals in highly sulfidic porewaters may exert a stronger influence on microbial bioavailability than total concentration

Glass, DR. Jennifer [California Institute of Technology, Pasadena; Yu, DR. Hang [California Institute of Technology, Pasadena; Steele, Joshua [California Institute of Technology, Pasadena; Dawson, Katherine [California Institute of Technology, Pasadena; Sun, S [University of California, San Diego; Chourey, Karuna [ORNL; Hettich, Robert {Bob} L [ORNL; Orphan, V [California Institute of Technology, Pasadena

2014-01-01T23:59:59.000Z

74

Mechanistic Studies on the Hydroxylation of Methane by Methane Monooxygenase  

E-Print Network [OSTI]

Mechanistic Studies on the Hydroxylation of Methane by Methane Monooxygenase Mu-Hyun Baik, Martin 2393 3.1. KIE in Methane Oxidations 2394 3.2. Primary and Secondary KIEs 2396 3.3. Other KIEs 2396 3 are bacteria that live on methane as their only source of carbon.1 The first step in their utilization

Baik, Mu-Hyun

75

Sulfonation of Methane Direct Liquid-Phase Sulfonation of Methane to  

E-Print Network [OSTI]

Sulfonation of Methane Direct Liquid-Phase Sulfonation of Methane to Methanesulfonic Acid by SO3 of methane to value-added prod- ucts is a significant contemporary challenge.[1] Methane is a very unreactive, consider- able effort has been devoted to the oxidation and oxidative carbonylation of methane.[2

Bell, Alexis T.

76

Oxygen Pathways and Carbon Dioxide Utilization in Methane Partial Oxidation in Ambient Temperature  

E-Print Network [OSTI]

- ronmental impact. Present technology uses steam reforming to produce synthesis gas which is converted into enhance- ment of the carbon balance of methane conversion by reforming with CO2 in order to "recycle

Mallinson, Richard

77

Biomimetic methane oxidation. Final report, October 1, 1989--June 1, 1995  

SciTech Connect (OSTI)

Transportation fuels are a critical energy commodity and they impact nearly every sector of this country. The need for transportation fuels is projected well into the next century. Consequently, there is a strong emphasis on the economical conversion of other domestic fossil energy resources to liquid hydrocarbons that can be used as transportation fuels. Natural gas is currently a readily available resource that has a positive future outlook considering its known and anticipated reserves. There is intense government and industrial interest in developing economic technologies to convert natural gas to liquid fuels. Methane, CH{sub 4}, is the primary hydrocarbon (85-95%) in natural gas. This document covers the following: production soluable of methane monooxygenase; production of particulate methane monooxygenase; production of methane monooxygenase in continuous culture; subunit resolution for active site identification of methylosinus trichosporium OB3b soluble methane monooxygenase; the synthesis and characterization of new copper coordination complexes contairing the asymmetric coordinating chelate ligand application to enzyme active site modeling; the synthesis and characterization of new iron coordination complexes utilizing an asymmetric coordinating chelate ligand; further characterization of new bionuclear iron complexes.

Watkins, B.E.; Satcher, J.H. Jr.; Droege, M.W.; Taylor, R.T.

1995-07-01T23:59:59.000Z

78

Diffusional methane fluxes within continental margin sediments and depositional constraints on formation factor estimates  

E-Print Network [OSTI]

Goldberg, E.D. , 1976. Methane production and consumption inanaerobic oxidation of methane. Nature, 407 , 623-626.profiles indicate in situ methane flux from underlying gas

Berg, Richard D.

2008-01-01T23:59:59.000Z

79

Electrochemical methane sensor  

DOE Patents [OSTI]

A method and instrument including an electrochemical cell for the detection and measurement of methane in a gas by the oxidation of methane electrochemically at a working electrode in a nonaqueous electrolyte at a voltage about 1.4 volts vs R.H.E. (the reversible hydrogen electrode potential in the same electrolyte), and the measurement of the electrical signal resulting from the electrochemical oxidation.

Zaromb, S.; Otagawa, T.; Stetter, J.R.

1984-08-27T23:59:59.000Z

80

Development of vanadium-phosphate catalysts for methanol production by selective oxidation of methane. Quarterly technical progress report 10, July 1, 1995--September 31, 1995  

SciTech Connect (OSTI)

This document is the tenth quarterly technical progress report under Contract No. DE-AC22-92PC92110 {open_quotes}Development of Vanadium-Phosphate Catalysts for Methanol Production by Selective Oxidation of Methane{close_quotes}. Activities focused on testing of additional modified and promoted catalysts and characterization of these materials. Attempts at improving the sensitivity of our GC based analytical systems were also made with some success. Methanol oxidation studies were initiated. These results are reported. Specific accomplishments include: (1) Methane oxidation testing of a suite of catalysts promoted with most of the first row transition metals was completed. Several of these materials produced low, difficult to quantify yields of formaldehyde. (2) Characterization of these materials by XRD and FTIR was performed with the goal of correlating activity and selectivity with catalyst properties. (3) We began to characterize catalysts prepared via modified synthesis methods designed to enhance acidity using TGA measurements of acetonitrile chemisorption and methanol dehydration to dimethyl ether as a test reaction. (4) A catalyst prepared in the presence of naphthalene methanol as a structural disrupter was tested for activity in methane oxidation. It was found that this material produced low yields of formaldehyde which were difficult to quantify. (5) Preparation of catalysts with no Bronsted acid sites. This was accomplished by replacement of exchangeable protons with potassium, and (6) Methanol oxidation studies were initiated to provide an indication of catalyst activity for decomposition of this desired product and as a method of characterizing the catalyst surface.

McCormick, R.L.

1995-12-07T23:59:59.000Z

Note: This page contains sample records for the topic "methane nitrous oxide" 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

Characterization of Methane Degradation and Methane-Degrading Microbes in Alaska Coastal Water  

SciTech Connect (OSTI)

The net flux of methane from methane hydrates and other sources to the atmosphere depends on methane degradation as well as methane production and release from geological sources. The goal of this project was to examine methane-degrading archaea and organic carbon oxidizing bacteria in methane-rich and methane-poor sediments of the Beaufort Sea, Alaska. The Beaufort Sea system was sampled as part of a multi-disciplinary expedition (??Methane in the Arctic Shelf? or MIDAS) in September 2009. Microbial communities were examined by quantitative PCR analyses of 16S rRNA genes and key methane degradation genes (pmoA and mcrA involved in aerobic and anaerobic methane degradation, respectively), tag pyrosequencing of 16S rRNA genes to determine the taxonomic make up of microbes in these sediments, and sequencing of all microbial genes (??metagenomes?). The taxonomic and functional make-up of the microbial communities varied with methane concentrations, with some data suggesting higher abundances of potential methane-oxidizing archaea in methane-rich sediments. Sequence analysis of PCR amplicons revealed that most of the mcrA genes were from the ANME-2 group of methane oxidizers. According to metagenomic data, genes involved in methane degradation and other degradation pathways changed with sediment depth along with sulfate and methane concentrations. Most importantly, sulfate reduction genes decreased with depth while the anaerobic methane degradation gene (mcrA) increased along with methane concentrations. The number of potential methane degradation genes (mcrA) was low and inconsistent with other data indicating the large impact of methane on these sediments. The data can be reconciled if a small number of potential methane-oxidizing archaea mediates a large flux of carbon in these sediments. Our study is the first to report metagenomic data from sediments dominated by ANME-2 archaea and is one of the few to examine the entire microbial assemblage potentially involved in anaerobic methane oxidation.

David Kirchman

2011-12-31T23:59:59.000Z

82

Activation of the C-H Bond of Methane by Intermediate Q of Methane Monooxygenase: A  

E-Print Network [OSTI]

Activation of the C-H Bond of Methane by Intermediate Q of Methane Monooxygenase: A Theoretical component (MMOH) of the multicomponent soluble methane monooxygenase (MMO) system catalyzes the oxidation of methane by dioxygen to form methanol and water at non-heme, dinuclear iron active sites. The catalytic

Gherman, Benjamin F.

83

Synthesis gas formation by catalytic oxidation of methane in fluidized bed reactors  

SciTech Connect (OSTI)

The production of synthesis gas (CO + H[sub 2]) by the catalytic partial oxidation of CH[sub 4] in air or O[sub 2] in static fluidized beds at atmospheric pressure has been examined over Pt, Rh, and Ni catalysts coated on 100-[mu]m [alpha]-Al[sub 2]O[sub 3] beads. With CH[sub 4]/air feeds, CO and H[sub 2] selectivities as high as 95% with >90% CH[sub 4] conversion were obtained on Rh and Ni catalysts at contact times of 0.1-0.5 sec. Pt catalysts were found to have significantly lower selectivities for all the three catalysts were improved by heating the reaction mixture above the autothermal reactor temperature and using O[sub 2] instead of air. The selectivities and conversions were fairly constant over the range of contact time s used. Probable reaction pathways for CH[sub 4] oxidation in fluidized beds are discussed. 31 refs., 6 figs.

Bharadwaj, S.S.; Schmidt, L.D. (Univ. of Minnesota, Minneapolis (United States))

1994-03-01T23:59:59.000Z

84

Comparison of monolith-supported metals for the direct oxidation of methane of syngas  

SciTech Connect (OSTI)

The partial oxidation of CH[sub 4] in O[sub 2] near atmospheric pressure to produce syngas was investigated on monolith-supported Rh, Ni, Pt, Ir, Pd, Pd-La[sub 2]O[sub 3], Fe, Co, Re, and Ru catalysts in an autothermal flow reactor at residence times of [approximately]10 msec (GHSV [approximately] 100,000 hr[sup [minus]1]). Optimal CH[sub 4] conversion and CO and H[sub 2] selectivities of 0.89, 0.95, and 0.90, respectively, were achieved on Rh at 1000[angstrom]C with no loss in activity over many hours. Ni showed similar conversion and selectivities but deactivated. Experiments with up to 25 vol% H[sub 2]O added to the feed showed little evidence of the occurrence of steam reforming and water-gas shift reactions. Pt and Ir sustained stable reaction but a lower selectivities and conversion than Rh or Ni. Pd, Pd-La[sub 2]O[sub 3], and Co deactivated rapidly, while Re, Ru, and Fe would not sustain autothermal reaction. Ni and Re deactivated by volatilization and metal loss, while Pd-La[sub 2]O[sub 3] deactivated by carbon formation, and Pd deactivated by a combination of metal loss and carbon formation. Pd produced up to 14% selectivity to C[sub 2]H[sub 4] and C[sub 2]H[sub 4] and C[sub 2]H[sub 6], Pd-La[sub 2]O[sub 3] up to 5%, Pt [approximately] 1%, and other metals less than 0.2%. 10 refs., 5 figs., 1 tab.

Torniainen, P.M.; Chu, X.; Schmidt, L.D. (Univ. of Minnesota, Minneapolis (United States))

1994-03-01T23:59:59.000Z

85

Interannual variability in tropospheric nitrous oxide  

E-Print Network [OSTI]

Observations of tropospheric N2O mixing ratio show significant variability on interannual timescales (0.2?ppb, 1 standard deviation). We found that interannual variability in N2O is weakly correlated with that in CFC-12 ...

Thompson, R. L.

86

Subarctic SoilS Nitrous oxide hotspots  

E-Print Network [OSTI]

, 2Department of Geological Sciences, University of Texas at Austin, Austin, Texas 78712, USA, 3 of the Apalachicola River on the Florida panhandle (Fig. 1). The steepheads are incised into 65 m of laterally

Kudrolli, Arshad

87

Syntrophic interactions and mechanisms underpinning anaerobic methane oxidation: targeted metaproteogenomics, single-cell protein detection and quantitative isotope imaging of microbial consortia  

SciTech Connect (OSTI)

Syntrophy and mutualism play a central role in carbon and nutrient cycling by microorganisms. Yet, our ability to effectively study symbionts in culture has been hindered by the inherent interdependence of syntrophic associations, their dynamic behavior, and their frequent existence at thermodynamic limits. Now solutions to these challenges are emerging in the form of new methodologies. Developing strategies that establish links between the identity of microorganisms and their metabolic potential, as well as techniques that can probe metabolic networks on a scale that captures individual molecule exchange and processing, is at the forefront of microbial ecology. Understanding the interactions between microorganisms on this level, at a resolution previously intractable, will lead to our greater understanding of carbon turnover and microbial community resilience to environmental perturbations. In this project, we studied an enigmatic syntrophic association between uncultured methane-oxidizing archaea and sulfate-reducing bacteria. This environmental archaeal-bacterial partnership represents a globally important sink for methane in anoxic environments. The specific goals of this project were organized into 3 major tasks designed to address questions relating to the ecophysiology of these syntrophic organisms under changing environmental conditions (e.g. different electron acceptors and nutrients), primarily through the development of microanalytical imaging methods which enable the visualization of the spatial distribution of the partners within aggregates, consumption and exchange of isotopically labeled substrates, and expression of targeted proteins identified via metaproteomics. The advanced tool set developed here to collect, correlate, and analyze these high resolution image and isotope-based datasets from methane-oxidizing consortia has the potential to be widely applicable for studying and modeling patterns of activity and interactions across a broad range of spatially structured microbial partnerships, including other syntrophic associations, microbial mats, biofilms, and plant-microbe or animal-microbe symbioses in nature.

Orphan, Victoria Jeanne [California Institute of Technology

2014-11-26T23:59:59.000Z

88

Catalytic Reduction of Nitrogen Oxides by Methane over Pd(110) S. M. Vesecky, J. Paul, and D. W. Goodman*  

E-Print Network [OSTI]

emissions.1 The subfield of environ- mental catalysis concerned with air quality control involves and stationary sources2 There are many stationary sources of environmental gas phase pollutants. Methane is perhaps the largest pollutant by volume, emitted from sources such as livestock, gas wells, and landfills

Goodman, Wayne

89

E-Print Network 3.0 - ambient nitric oxide Sample Search Results  

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

oxides (NOx)." Other nitrogen oxides include nitrous acid and nitric acid. While... . Nitrogen Dioxide: Nitrogen dioxide (NO2) is one of a group of highly reactive gasses known...

90

A High-Yield, Liquid-Phase Approach for the Partial Oxidation of Methane to Methanol using SO3 as the Oxidant  

E-Print Network [OSTI]

approach for producing methanol from methane in a three-step, liquid phase process is reported is hydrolyzed in the presence of an organic solvent, to produce an organic phase con- taining methanol the facile separation of methanol. Con- centrated sulfuric acid is produced as a by-product, which can either

Bell, Alexis T.

91

Quasielastic electron scattering from methane, methane-d4, methane-d2, ethylene, and 2-methylpropane  

E-Print Network [OSTI]

Quasielastic electron scattering from methane, methane-d4, methane-d2, ethylene, and 2-methylpropane, ethylene, methane, and two isotopically substituted methanes, CH2D2 and CD4, at a momentum constituent. For example, Fig. 1 of Ref. 2 shows that, for gaseous methane, above a certain momentum transfer

Hitchcock, Adam P.

92

SUESS ET AL.: SEA FLOOR METHANE HYDRATES AT HYDRATE RIDGE, CASCADIA MARGIN Sea Floor Methane Hydrates at Hydrate Ridge, Cascadia Margin  

E-Print Network [OSTI]

SUESS ET AL.: SEA FLOOR METHANE HYDRATES AT HYDRATE RIDGE, CASCADIA MARGIN 1 Sea Floor Methane are exposed at the sea floor. A methane-oxidizing bacterial consortium populates the exposures of hydrate; colonies of vent macro-fauna are abundant as well. Discharge of methane from destabilized hydrate

Goldfinger, Chris

93

THE EARTH SYSTEM SCIENCE It is the science that studies the whole  

E-Print Network [OSTI]

by coal, continuing deforestation, and limited or no control of methane, nitrous oxide, and carbon of the twenty-first century, a phaseout of CFC emissions, and limitations on agricultural methane and nitrous

Gilbes, Fernando

94

Modeling of Pressurized Electrochemistry and Steam-Methane Reforming in Solid Oxide Fuel Cells and the Effects on Thermal and Electrical Stack Performance  

SciTech Connect (OSTI)

Summarizes work done to extend the electrochemical performance and methane reforming submodels to include the effects of pressurization and to demonstrate this new modeling capability by simulating large stacks operating on methane-rich fuel under pressurized and non-pressurized conditions. Pressurized operation boosts electrochemical performance, alters the kinetics of methane reforming, and effects the equilibrium composition of methane fuels. This work developed constitutive submodels that couple the electrochemistry, reforming, and pressurization to yield an increased capability of the modeling tool for prediction of SOFC stack performance.

Recknagle, Kurtis P.; Khaleel, Mohammad A.

2009-03-01T23:59:59.000Z

95

Detailed modeling and laser-induced fluorescence imaging of nitric oxide in a NH(i)-seeded non-premixed methane/air flame  

SciTech Connect (OSTI)

In this paper we study the formation of NO in laminar, nitrogen diluted methane diffusion flames that are seeded with ammonia in the fuel stream. We have performed numerical simulations with detailed chemistry as well as laser-induced fluorescence imaging measurements for a range of ammonia injection rates. For comparison with the experimental data, synthetic LIF images are calculated based on the numerical data accounting for temperature and fluorescence quenching effects. We demonstrate good agreement between measurements and computations. The LIF corrections inferred from the simulation are then used to calculate absolute NO mole fractions from the measured signal.The NO formation in both doped and undoped flames occurs in the flame sheet. In the undoped flame, four different mechanisms including thermal and prompt NO appear to contribute to NO formation. As the NH3 seeding level increases, fuel-NO becomes the dominant mechanism and N2 shifts from being a net reactant to being a net product. Nitric oxide in the undoped flame as well as in the core region of the doped flames are underpredicted by the model; we attribute this mainly to inaccuracies in the NO recycling chemistry on the fuel-rich side of the flame sheet.

Bell, John B.; Day, Marcus S.; Grcar, Joseph F.; Bessler, Wolfgang G.; Schulz, Christof; Glarborg, Peter; Jensen, Anker D.

2001-12-14T23:59:59.000Z

96

Methane-related authigenic carbonates from the Black Sea: geochemical characterisation and relation to seeping fluids  

E-Print Network [OSTI]

Methane-related authigenic carbonates from the Black Sea: geochemical characterisation and relation of carbon derived from the anaerobic oxidation of methane (AOM), the oxidation of organic matter and from sea water. Methane is the dominant component among other hydrocarbon gases in these sediments. Its

Mazzini, Adriano

97

Carbon dioxide and methane in karst systems Supervisors: Prof Dave Mattey, Dr Dave Lowry and Dr. Rebecca Fisher  

E-Print Network [OSTI]

Carbon dioxide and methane in karst systems Supervisors: Prof Dave Mattey, Dr Dave Lowry and Dr in the carbon cycle and very little is known about the behavior of methane in karst systems. Methane carbon isotopic evidence for oxidation of atmospheric methane in a dynamically ventilated cave

Royal Holloway, University of London

98

Methane fluxes between terrestrial ecosystems and the atmosphere at northern high latitudes during the past century: A retrospective  

E-Print Network [OSTI]

Methane fluxes between terrestrial ecosystems and the atmosphere at northern high latitudes during develop and use a new version of the Terrestrial Ecosystem Model (TEM) to study how rates of methane (CH4 dynamics (3309); 1890 Hydrology: Wetlands; KEYWORDS: methane emissions, methane oxidation, permafrost

McGuire, A. David

99

New manganese catalyst for light alkane oxidation  

DOE Patents [OSTI]

Aluminophosphates containing manganese in the structural framework are employed for the oxidation of alkanes, for example the vapor phase oxidation of methane to methanol.

Durante, Vincent A. (West Chester, PA); Lyons, James E. (Wallingford, PA); Walker, Darrell W. (Visalia, CA); Marcus, Bonita K. (Radnor, PA)

1994-01-01T23:59:59.000Z

100

Availability of Nitrous Nitrogen to Plants.  

E-Print Network [OSTI]

V, .=DL ULL LI~C a~ailability 01 ILILKLL~: IIILIU~~I~ LU curn, l~aa, 8011 31LY3 1 27.3 .53 .I447 1 I 1 5: 1250 .I349 ic nitrogen ( 37.P' 1 -59 1 .2195 ru.. nv / 36.6 .57 1 .2086 I -2141 1 .O7b/ I 1. gm. nitrous nitrogen 30.2 1 .64 1 .I933 1... .12 -.01 ' .09 V1 -- I w 01 ---- I ------ el M - 1 --O6 X * ---- ------ U1 $ !z - --- i d $ --- - I -20 2 Y * F - I M 4 M .34 I --- .20 M .14 5 nitrogen --- --- -.02 .14 -.48 -.01 -12 .18 .OS...

Fraps, G. S. (George Stronach); Sterges, A. J.

1935-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "methane nitrous oxide" 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

Diffusional methane fluxes within continental margin sediments and depositional constraints on formation factor estimates  

E-Print Network [OSTI]

subsurface life in deep-sea sediments. Science , 295 , 2067-consumption in anoxic marine sediments. Geology , 4 , 297-oxidation in methane-rich sediments overlying the Blake

Berg, Richard D.

2008-01-01T23:59:59.000Z

102

Is methane venting at the seafloor recorded by D13 of benthic foraminifera shells?  

E-Print Network [OSTI]

Is methane venting at the seafloor recorded by D13 C of benthic foraminifera shells? M. E. Torres,1] The isotopic composition of the dissolved inorganic carbon (DIC) collected at sites of active methane discharge on Hydrate Ridge, Oregon, reveals anaerobic methane oxidation mediated by bacteria, with d13 CDIC reaching

Kurapov, Alexander

103

Method of determining methane and electrochemical sensor therefor  

DOE Patents [OSTI]

A method and instrument including an electrochemical cell for the detection and measurement of methane in a gas by the oxidation of methane electrochemically at a working electrode in a nonaqueous electrolyte at a voltage about about 1.4 volts versus R.H.E. (the reversible hydrogen electrode potential in the same electrolyte), and the measurement of the electrical signal resulting from the electrochemical oxidation.

Zaromb, Solomon (Hinsdale, IL); Otagawa, Takaaki (Westmont, IL); Stetter, Joseph R. (Naperville, IL)

1986-01-01T23:59:59.000Z

104

Engineering Methane is a major component of shale gas. Recent  

E-Print Network [OSTI]

-added chemicals, (ii) efficient electricity generation through fuel cells, and (iii) methane storage for vehicles), and electrochemical oxidation of CH4 in the solid oxide fuel cell (SOFC). In situ IR studies revealed that adsorbed of solid oxide fuel cells. In 2009, he established FirstEnergyAdvanced Energy Research Center, focusing

105

Nitrous Oxide Production in the Gulf of Mexico Hypoxic Zone  

E-Print Network [OSTI]

% of the annual freshwater discharge, 98.5% of the annual nitrogen load, and 98% of the annual phosphorus load into the zone most likely to influence hypoxia (Rabalais et al. 2007). Ecosystem responses to hypoxia include diminished biodiversity and altered...

Visser, Lindsey A.

2010-10-12T23:59:59.000Z

106

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:...

107

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:...

108

Biomarker Response to Galactic Cosmic Ray-Induced NOx and the Methane Greenhouse Effect in the Atmosphere of an Earthlike Planet Orbiting an M-Dwarf Star  

E-Print Network [OSTI]

Planets orbiting in the habitable zone (HZ) of M-Dwarf stars are subject to high levels of galactic cosmic rays (GCRs) which produce nitrogen oxides in earthlike atmospheres. We investigate to what extent this NOx may modify biomarker compounds such as ozone (O3) and nitrous oxide (N2O), as well as related compounds such as water (H2O) (essential for life) and methane (CH4) (which has both abiotic and biotic sources) . Our model results suggest that such signals are robust, changing in the M-star world atmospheric column by up to 20% due to the GCR NOx effects compared to an M-star run without GCR effects and can therefore survive at least the effects of galactic cosmic rays. We have not however investigated stellar cosmic rays here. CH4 levels are about 10 times higher than on the Earth related to a lowering in hydroxyl (OH) in response to changes in UV. The increase is less than reported in previous studies. This difference arose partly because we used different biogenic input. For example, we employed 23% ...

Grenfell, J L; Patzer, B; Rauer, H; Segura, A; Stadelmann, A; Stracke, B; Titz, R; Von Paris, P; Grenfell, John Lee; Griessmeier, Jean-Mathias; Patzer, Beate; Rauer, Heike; Segura, Antigona; Stadelmann, Anja; Stracke, Barbara; Titz, Ruth; Paris, Philip von

2007-01-01T23:59:59.000Z

109

Methane Hydrate Field Program  

SciTech Connect (OSTI)

This final report document summarizes the activities undertaken and the output from three primary deliverables generated during this project. This fifteen month effort comprised numerous key steps including the creation of an international methane hydrate science team, determining and reporting the current state of marine methane hydrate research, convening an international workshop to collect the ideas needed to write a comprehensive Marine Methane Hydrate Field Research Plan and the development and publication of that plan. The following documents represent the primary deliverables of this project and are discussed in summary level detail in this final report. Historical Methane Hydrate Project Review Report Methane Hydrate Workshop Report Topical Report: Marine Methane Hydrate Field Research Plan Final Scientific/Technical Report

None

2013-12-31T23:59:59.000Z

110

Methane Digester Loan Program  

Broader source: Energy.gov [DOE]

Established in 1998, the Minnesota Dept. of Agriculture Methane Digester Loan Program helps livestock producers install on-farm anaerobic digesters used for the production of electricity by...

111

Methanation assembly using multiple reactors  

DOE Patents [OSTI]

A methanation assembly for use with a water supply and a gas supply containing gas to be methanated in which a reactor assembly has a plurality of methanation reactors each for methanating gas input to the assembly and a gas delivery and cooling assembly adapted to deliver gas from the gas supply to each of said methanation reactors and to combine water from the water supply with the output of each methanation reactor being conveyed to a next methanation reactor and carry the mixture to such next methanation reactor.

Jahnke, Fred C.; Parab, Sanjay C.

2007-07-24T23:59:59.000Z

112

Assessing methane oxidation under landfill covers and its contribution to the above atmospheric CO2 levels: The added value of the isotope  

E-Print Network [OSTI]

biogas fluxes, which was expected in clay covers presenting fissures, through which CH4 is rapidly transported. At shallow depth, more immobile biogas pockets show a higher level of CH4 oxidation., 1998). The main com- ponents of biogas are CH4 (50­60%) and carbon dioxide (CO2; 40­50%). A major

113

The oxidative dehydrogenation of ethane with nitrous oxide by molybdenum oxide supported on silica gel  

E-Print Network [OSTI]

pmole/min/g Ho for the formation of ethylene corresponds to a conversion of 0. 6% based on ethane. The steady state rates were low at temperatures less than 350 C, wnereas tne selectivity to ethylene (defined as mole ethylene/mole ethylene + 1/2 mole.... The rates of formation for C284 ( ~ ) and CO& (& ) as a function of temperature. Flow rates of gases: C~H8, 8. 4 ml/min; N~Q, 48. 8 ml/min. 15 g 12 0 0) c g 0 E ~6 300 325 350 375 400 425 450 T ('~) TABLE 1 Reactions of C 2H6 with N20 at Different...

Yang, Tsong-Jen

1979-01-01T23:59:59.000Z

114

The oxidative dehydrogenation of ethane with nitrous oxide by molybdenum oxide supported by silica gel  

E-Print Network [OSTI]

for C 2BA Eormation ~Tt, 's C H produced, pmole 1-run-150-min total 5-run-150 min total 280~ 27. 1 33. 6 300~ expt. not performed 62. S 350' 96. 0 207. 0 a Recirculating System; 3. 0 g catalyst& Pretreatment: X=0. 25 TABLE 2 a Product... Distributions at Selected Temperatures t 'C Mole % Products 280c 300' (CHA) (CO2) (C 2HA) 4% 16%, 80s 4% 18% 78% 350 c 6% 21% 73% a Recirculating System; 3. 0 g catalyst| Pretreatment: )%, =0. 25 W V Fig. 10. The dependence of activity for C 2He...

Ward, Mark Branham

1977-01-01T23:59:59.000Z

115

Journal of Electron Spectroscopy and Related Phenomena 155 (2007) 2834 Electron Compton scattering from methane and methane-d4  

E-Print Network [OSTI]

from methane and methane-d4 G. Coopera, A.P. Hitchcocka,, C.A. Chatzidimitriou-Dreismannb, M. Vosc]. © 2006 Elsevier B.V. All rights reserved. Keywords: Quasi-elastic electron scattering; Methane; CD4

Hitchcock, Adam P.

116

THE GREENHOUSE EFFECT RISING GREENHOUSE GASES AND CLIMATE CHANGE  

E-Print Network [OSTI]

, methane, and nitrous oxides. The sun's energy passes through these gases, like light passing through risen by almost 40 percent. This is attributed primarily to the burning of fossil fuels (coal, oil, gasoline). Methane and nitrous oxides are also increasing rapidly, due in part to the expansion

117

The basics of coalbed methane  

SciTech Connect (OSTI)

The report is an overview of coalbed methane (CBM), also known as coal seam gas. It provides an overview of what coalbed methane is and the current status of global coalbed methane exploration and production. Topics covered in the report include: An analysis of the natural gas industry, including current and future production, consumption, and reserves; A detailed description of coalbed methane, its characteristics, and future potential; An analysis of the key business factors that are driving the increased interest in coalbed methane; An analysis of the barriers that are hindering the development of coalbed methane; An overview of the technologies used for coalbed methane production and water treatment; and Profiles of key coalbed methane producing countries. 25 figs., 5 tabs., 1 app.

NONE

2006-12-15T23:59:59.000Z

118

ISSUE PAPER METHANE AVOIDANCE FROM  

E-Print Network [OSTI]

ISSUE PAPER METHANE AVOIDANCE FROM COMPOSTING An Issue Paper for the: Climate Action Reserve...........................................................................................................39 6.2. Standard Methods for Quantifying Methane from Organic Waste in Landfills...40 6.3. GHG

Brown, Sally

119

Enhanced coalbed methane recovery  

SciTech Connect (OSTI)

The recovery of coalbed methane can be enhanced by injecting CO{sub 2} in the coal seam at supercritical conditions. Through an in situ adsorption/desorption process the displaced methane is produced and the adsorbed CO{sub 2} is permanently stored. This is called enhanced coalbed methane recovery (ECBM) and it is a technique under investigation as a possible approach to the geological storage of CO{sub 2} in a carbon dioxide capture and storage system. This work reviews the state of the art on fundamental and practical aspects of the technology and summarizes the results of ECBM field tests. These prove the feasibility of ECBM recovery and highlight substantial opportunities for interdisciplinary research at the interface between earth sciences and chemical engineering.

Mazzotti, M.; Pini, R.; Storti, G. [ETH, Zurich (Switzerland). Inst. of Process Engineering

2009-01-15T23:59:59.000Z

120

5, 94059445, 2005 Methane emissions  

E-Print Network [OSTI]

ACPD 5, 9405­9445, 2005 Methane emissions from SCIAMACHY observations J. F. Meirink et al. Title and Physics Discussions Sensitivity analysis of methane emissions derived from SCIAMACHY observations through, 9405­9445, 2005 Methane emissions from SCIAMACHY observations J. F. Meirink et al. Title Page Abstract

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "methane nitrous oxide" 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

4, 9931057, 2007 Methane hydrate  

E-Print Network [OSTI]

BGD 4, 993­1057, 2007 Methane hydrate stability and anthropogenic climate change D. Archer Title Discussions Biogeosciences Discussions is the access reviewed discussion forum of Biogeosciences Methane 2007 Correspondence to: D. Archer (d-archer@uchicago.edu) 993 #12;BGD 4, 993­1057, 2007 Methane hydrate

Paris-Sud XI, Université de

122

5, 243270, 2008 Methane emissions  

E-Print Network [OSTI]

BGD 5, 243­270, 2008 Methane emissions from plant biomass I. Vigano et al. Title Page Abstract and temperature on the emission of methane from plant biomass and structural components I. Vigano 1 , H. van.roeckmann@phys.uu.nl) 243 #12;BGD 5, 243­270, 2008 Methane emissions from plant biomass I. Vigano et al. Title Page Abstract

Paris-Sud XI, Université de

123

The Tri--Methane Rearrangement  

E-Print Network [OSTI]

The Tri--Methane Rearrangement #12;Cirkva, Vladimir; Zuraw, Michael J.; Zimmerman, Howard E.* Department of Chemistry, University of Wisconsin, Madison, WI 53706 #12;INTRODUCTION The tri--methane of a cyclopentene 5a, but only in crystalline medium. However, in the solution photochemistry of tri--methane system

Cirkva, Vladimir

124

6, 68416852, 2006 Methane emission  

E-Print Network [OSTI]

ACPD 6, 6841­6852, 2006 Methane emission from savanna grasses E. Sanhueza and L. Donoso Title Page Chemistry and Physics Discussions Methane emission from tropical savanna Trachypogon sp. grasses E. Sanhueza;ACPD 6, 6841­6852, 2006 Methane emission from savanna grasses E. Sanhueza and L. Donoso Title Page

Boyer, Edmond

125

The Tri--Methane Rearrangement  

E-Print Network [OSTI]

The Tri--Methane Rearrangement #12;Církva, Vladimír; Zuraw, Michael J.; Zimmerman, Howard E.* Department of Chemistry, University of Wisconsin, Madison, WI 53706 #12;INTRODUCTION The tri--methane of a cyclopentene 5a, but only in crystalline medium. However, in the solution photochemistry of tri--methane system

Cirkva, Vladimir

126

METHANE AND METHANOTROPHY IN TEXAS AQUIFERS ETHAN L. GROSSMAN,1 CHUANLUN ZHANG,1* JAMES W. AMMERMAN,2 AND MARTHA J. D.  

E-Print Network [OSTI]

1 METHANE AND METHANOTROPHY IN TEXAS AQUIFERS ETHAN L. GROSSMAN,1 CHUANLUN ZHANG,1* JAMES W-occurring methane-oxidizing bacteria (methanotrophs) have been shown to degrade the halogenated hydrocarbons, especially for deep pristine aquifers. Many Texas groundwaters contain significant to abundant methane

Grossman, Ethan L.

127

Biomarker Response to Galactic Cosmic Ray-Induced NOx and the Methane Greenhouse Effect in the Atmosphere of an Earthlike Planet Orbiting an M-Dwarf Star  

E-Print Network [OSTI]

Planets orbiting in the habitable zone (HZ) of M-Dwarf stars are subject to high levels of galactic cosmic rays (GCRs) which produce nitrogen oxides in earthlike atmospheres. We investigate to what extent this NOx may modify biomarker compounds such as ozone (O3) and nitrous oxide (N2O), as well as related compounds such as water (H2O) (essential for life) and methane (CH4) (which has both abiotic and biotic sources) . Our model results suggest that such signals are robust, changing in the M-star world atmospheric column by up to 20% due to the GCR NOx effects compared to an M-star run without GCR effects and can therefore survive at least the effects of galactic cosmic rays. We have not however investigated stellar cosmic rays here. CH4 levels are about 10 times higher than on the Earth related to a lowering in hydroxyl (OH) in response to changes in UV. The increase is less than reported in previous studies. This difference arose partly because we used different biogenic input. For example, we employed 23% lower CH4 fluxes compared to those studies. Unlike on the Earth, relatively modest changes in these fluxes can lead to larger changes in the concentrations of biomarker and related species on the M-star world. We calculate a CH4 greenhouse heating effect of up to 4K. O3 photochemistry in terms of the smog mechanism and the catalytic loss cycles on the M-star world differs considerably compared with the Earth.

John Lee Grenfell; Jean-Mathias Griessmeier; Beate Patzer; Heike Rauer; Antigona Segura; Anja Stadelmann; Barbara Stracke; Ruth Titz; Philip von Paris

2007-02-23T23:59:59.000Z

128

ARM - Methane Background Information  

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

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129

ARM - Methane Gas  

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 JunDatastreamsmmcrcalgovInstrumentsruc Documentation RUC : XDCResearchWarmingMethane Background Information Outreach Home Room

130

Coal Bed Methane Primer  

SciTech Connect (OSTI)

During the second half of the 1990's Coal Bed Methane (CBM) production increased dramatically nationwide to represent a significant new source of income and natural gas for many independent and established producers. Matching these soaring production rates during this period was a heightened public awareness of environmental concerns. These concerns left unexplained and under-addressed have created a significant growth in public involvement generating literally thousands of unfocused project comments for various regional NEPA efforts resulting in the delayed development of public and fee lands. The accelerating interest in CBM development coupled to the growth in public involvement has prompted the conceptualization of this project for the development of a CBM Primer. The Primer is designed to serve as a summary document, which introduces and encapsulates information pertinent to the development of Coal Bed Methane (CBM), including focused discussions of coal deposits, methane as a natural formed gas, split mineral estates, development techniques, operational issues, producing methods, applicable regulatory frameworks, land and resource management, mitigation measures, preparation of project plans, data availability, Indian Trust issues and relevant environmental technologies. An important aspect of gaining access to federal, state, tribal, or fee lands involves education of a broad array of stakeholders, including land and mineral owners, regulators, conservationists, tribal governments, special interest groups, and numerous others that could be impacted by the development of coal bed methane. Perhaps the most crucial aspect of successfully developing CBM resources is stakeholder education. Currently, an inconsistent picture of CBM exists. There is a significant lack of understanding on the parts of nearly all stakeholders, including industry, government, special interest groups, and land owners. It is envisioned the Primer would being used by a variety of stakeholders to present a consistent and complete synopsis of the key issues involved with CBM. In light of the numerous CBM NEPA documents under development this Primer could be used to support various public scoping meetings and required public hearings throughout the Western States in the coming years.

Dan Arthur; Bruce Langhus; Jon Seekins

2005-05-25T23:59:59.000Z

131

Alternative technologies to steam-methane reforming  

SciTech Connect (OSTI)

Steam-methane reforming (SMR) has been the conventional route for hydrogen and carbon monoxide production from natural gas feedstocks. However, several alternative technologies are currently finding favor for an increasing number of applications. The competing technologies include: steam-methane reforming combined with oxygen secondary reforming (SMR/O2R); autothermal reforming (ATR); thermal partial oxidation (POX). Each of these alternative technologies uses oxygen as a feedstock. Accordingly, if low-cost oxygen is available, they can be an attractive alternate to SMR with natural gas feedstocks. These technologies are composed technically and economically. The following conclusions can be drawn: (1) the SMR/O2R, ATR and POX technologies can be attractive if low-cost oxygen is available; (2) for competing technologies, the H{sub 2}/CO product ratio is typically the most important process parameter; (3) for low methane slip, the SMR/O2R, ATR and POX technologies are favored; (4) for full CO{sub 2} recycle, POX is usually better than ATR; (5) relative to POX, the ATR is a nonlicensed technology that avoids third-party involvement; (6) economics of each technology are dependent on the conditions and requirements for each project and must be evaluated on a case-by-case basis.

Tindall, B.M.; Crews, M.A. [Howe-Baker Engineers, Inc., Tyler, TX (United States)

1995-11-01T23:59:59.000Z

132

Fluxes of methane between landfills and the atmosphere: Natural and engineered controls  

SciTech Connect (OSTI)

Field measurement of landfill methane emissions indicates natural variability spanning more than 2 seven orders of magnitude, from approximately 0.0004 to more than 4000 g m{sub -2} day{sup -1}. This wide range reflects net emissions resulting from production (methanogenesis), consumption (methanotrophic oxidation), and gaseous transport processes. The determination of an {open_quotes}average{close_quotes} emission rate for a given field site requires sampling designs and statistical techniques which consider spatial and temporal variability. Moreover, particularly at sites with pumped gas recovery systems, it is possible for methanotrophic microorganisms in aerated cover soils to oxidize all of the methane from landfill sources below and, additionally, to oxidize methane diffusing into cover soils from atmospheric sources above. In such cases, a reversed soil gas concentration gradient is observed in shallow cover soils, indicating bidirectional diffusional transport to the depth of optimum methane oxidation. Rates of landfill methane oxidation from field and laboratory incubation studies range up to 166 g m{sup -2} day{sup -1} among the highest for any natural setting, providing an effective natural control on net emissions. Estimates of worldwide landfill methane emissions to the atmosphere have ranged from 9 to 70 Tg yr{sup -1}, differing mainly in assumed methane yields from estimated quantities of landfilled refuse. At highly controlled landfill sites in developed countries, landfill methane is often collected via vertical wells or horizontal collectors. Recovery of landfill methane through engineered systems can provide both environmental and energy benefits by mitigating subsurface migration, reducing surface emissions, and providing an alternative energy resource for industrial boiler use, on-site electrical generation, or upgrading to a substitute natural gas.

Bogner, J. [Argonne National Lab., IL (United States); Meadows, M. [ETSU, Harwell, Oxfordshire (United Kingdom); Czepiel, P. [Harvard Univ., Cambridge, MA (United States)

1997-08-01T23:59:59.000Z

133

Capture and Use of Coal Mine Ventilation Air Methane  

SciTech Connect (OSTI)

CONSOL Energy Inc., in conjunction with MEGTEC Systems, Inc., and the U.S. Department of Energy with the U.S. Environmental Protection Agency, designed, built, and operated a commercial-size thermal flow reversal reactor (TFRR) to evaluate its suitability to oxidize coal mine ventilation air methane (VAM). Coal mining, and particularly coal mine ventilation air, is a major source of anthropogenic methane emissions, a greenhouse gas. Ventilation air volumes are large and the concentration of methane in the ventilation air is low; thus making it difficult to use or abate these emissions. This test program was conducted with simulated coal mine VAM in advance of deploying the technology on active coal mine ventilation fans. The demonstration project team installed and operated a 30,000 cfm MEGTEC VOCSIDIZER oxidation system on an inactive coal mine in West Liberty, WV. The performance of the unit was monitored and evaluated during months of unmanned operation at mostly constant conditions. The operating and maintenance history and how it impacts the implementation of the technology on mine fans were investigated. Emission tests showed very low levels of all criteria pollutants at the stack. Parametric studies showed that the equipment can successfully operate at the design specification limits. The results verified the ability of the TFRR to oxidize {ge}95% of the low and variable concentration of methane in the ventilation air. This technology provides new opportunities to reduce greenhouse gas emissions by the reduction of methane emissions from coal mine ventilation air. A large commercial-size installation (180,000 cfm) on a single typical mine ventilation bleeder fan would reduce methane emissions by 11,000 to 22,100 short tons per year (the equivalent of 183,000 to 366,000 metric tonnes carbon dioxide).

Deborah Kosmack

2008-10-31T23:59:59.000Z

134

Methane/nitrogen separation process  

DOE Patents [OSTI]

A membrane separation process is described for treating a gas stream containing methane and nitrogen, for example, natural gas. The separation process works by preferentially permeating methane and rejecting nitrogen. The authors have found that the process is able to meet natural gas pipeline specifications for nitrogen, with acceptably small methane loss, so long as the membrane can exhibit a methane/nitrogen selectivity of about 4, 5 or more. This selectivity can be achieved with some rubbery and super-glassy membranes at low temperatures. The process can also be used for separating ethylene from nitrogen. 11 figs.

Baker, R.W.; Lokhandwala, K.A.; Pinnau, I.; Segelke, S.

1997-09-23T23:59:59.000Z

135

Methane/nitrogen separation process  

DOE Patents [OSTI]

A membrane separation process for treating a gas stream containing methane and nitrogen, for example, natural gas. The separation process works by preferentially permeating methane and rejecting nitrogen. We have found that the process is able to meet natural gas pipeline specifications for nitrogen, with acceptably small methane loss, so long as the membrane can exhibit a methane/nitrogen selectivity of about 4, 5 or more. This selectivity can be achieved with some rubbery and super-glassy membranes at low temperatures. The process can also be used for separating ethylene from nitrogen.

Baker, Richard W. (Palo Alto, CA); Lokhandwala, Kaaeid A. (Menlo Park, CA); Pinnau, Ingo (Palo Alto, CA); Segelke, Scott (Mountain View, CA)

1997-01-01T23:59:59.000Z

136

Bioconversion of biomass to methane  

SciTech Connect (OSTI)

The conversion of biomass to methane is described. The biomethane potentials of various biomass feedstocks from our laboratory and literature is summarized.

Hashimoto, A.G. [Oregon State Univ., Corvallis, OR (United States)

1995-12-01T23:59:59.000Z

137

Functionally gradient material for membrane reactors to convert methane gas into value-added products  

DOE Patents [OSTI]

A functionally gradient material for a membrane reactor for converting methane gas into value-added-products includes an outer tube of perovskite, which contacts air; an inner tube which contacts methane gas, of zirconium oxide, and a bonding layer between the perovskite and zirconium oxide layers. The bonding layer has one or more layers of a mixture of perovskite and zirconium oxide, with the layers transitioning from an excess of perovskite to an excess of zirconium oxide. The transition layers match thermal expansion coefficients and other physical properties between the two different materials.

Balachandran, Uthamalingam (Hinsdale, IL); Dusek, Joseph T. (Lombard, IL); Kleefisch, Mark S. (Napersville, IL); Kobylinski, Thadeus P. (Lisle, IL)

1996-01-01T23:59:59.000Z

138

Functionally gradient material for membrane reactors to convert methane gas into value-added products  

DOE Patents [OSTI]

A functionally gradient material for a membrane reactor for converting methane gas into value-added-products includes an outer tube of perovskite, which contacts air; an inner tube which contacts methane gas, of zirconium oxide, and a bonding layer between the perovskite and zirconium oxide layers. The bonding layer has one or more layers of a mixture of perovskite and zirconium oxide, with the layers transitioning from an excess of perovskite to an excess of zirconium oxide. The transition layers match thermal expansion coefficients and other physical properties between the two different materials. 7 figs.

Balachandran, U.; Dusek, J.T.; Kleefisch, M.S.; Kobylinski, T.P.

1996-11-12T23:59:59.000Z

139

VIBRATION->VIBRATION ENERGY TRANSFER IN METHANE  

E-Print Network [OSTI]

VIBRATION ENERGY TRANSFER IN METHANE Peter Hess, A. H. Kung,Rotation Spectra of Methane, U.S. Nat'L Tech. Inform.tret t tllll. I. INTRODUCTION Methane is a relatively simple

Hess, Peter

2012-01-01T23:59:59.000Z

140

Coal Bed Methane Protection Act (Montana)  

Broader source: Energy.gov [DOE]

The Coal Bed Methane Protection Act establishes a long-term coal bed methane protection account and a coal bed methane protection program for the purpose of compensating private landowners and...

Note: This page contains sample records for the topic "methane nitrous oxide" from the National Library of EnergyBeta (NLEBeta).
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141

methane hydrate science plan-final.indd  

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

2013 Principal Authors: Consor um for Ocean Leadership and the Methane Hydrate Project Science Team December 2013 DOE Award Number: DE-FE0010195 Project Title: Methane Hydrate...

142

Catalyst for the methanation of carbon monoxide in sour gas  

DOE Patents [OSTI]

The invention involves the synergistic effect of the specific catalytic constituents on a specific series of carriers for the methanation of carbon monoxide in the presence of sulfur at relatively high temperatures and at low steam to gas ratios in the range of 0.2:1 or less. This effect was obtained with catalysts comprising the mixed sulfides and oxides of nickel and chromium supported on carriers comprising magnesium aluminate and magnesium silicate. Conversion of carbon monoxide to methane was in the range of from 40 to 80%. Tests of this combination of metal oxides and sulfides on other carriers and tests of other metal oxides and sulfides on the same carrier produced a much lower level of conversion.

Kustes, William A. (Louisville, KY); Hausberger, Arthur L. (Louisville, KY)

1985-01-01T23:59:59.000Z

143

Coalbed Methane Production  

Gasoline and Diesel Fuel Update (EIA)

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) " ,"Click worksheet9,1,50022,3,,,,6,1,,781Title: Telephone:shortOil andMCKEESPORTfor the 2012Methane

144

Reducing Open Cell Landfill Methane Emissions with a Bioactive Alternative Daily  

SciTech Connect (OSTI)

Methane and carbon dioxide are formed in landfills as wastes degrade. Molecule-for-molecule, methane is about 20 times more potent than carbon dioxide at trapping heat in the earth's atmosphere, and thus, it is the methane emissions from landfills that are scrutinized. For example, if emissions composed of 60% methane and 40% carbon dioxide were changed to a mix that was 40% methane and 60% carbon dioxide, a 30% reduction in the landfill's global warming potential would result. A 10% methane, 90% carbon dioxide ratio will result in a 75% reduction in global warming potential compared to the baseline. Gas collection from a closed landfill can reduce emissions, and it is sometimes combined with a biocover, an engineered system where methane oxidizing bacteria living in a medium such as compost, convert landfill methane to carbon dioxide and water. Although methane oxidizing bacteria merely convert one greenhouse gas (methane) to another (carbon dioxide), this conversion can offer significant reductions in the overall greenhouse gas contribution, or global warming potential, associated with the landfill. What has not been addressed to date is the fact that methane can also escape from a landfill when the active cell is being filled with waste. Federal regulations require that newly deposited solid waste to be covered daily with a 6 in layer of soil or an alternative daily cover (ADC), such as a canvas tarp. The aim of this study was to assess the feasibility of immobilizing methane oxidizing bacteria into a tarp-like matrix that could be used for alternative daily cover at open landfill cells to prevent methane emissions. A unique method of isolating methanotrophs from landfill cover soil was used to create a liquid culture of mixed methanotrophs. A variety of prospective immobilization techniques were used to affix the bacteria in a tarp-like matrix. Both gel encapsulation of methanotrophs and gels with liquid cores containing methanotrophs were readily made but prone to rapid desiccation. Bacterial adsorption onto foam padding, natural sponge, and geotextile was successful. The most important factor for success appeared to be water holding capacity. Prototype biotarps made with geotextiles plus adsorbed methane oxidizing bacteria were tested for their responses to temperature, intermittent starvation, and washing (to simulate rainfall). The prototypes were mesophilic, and methane oxidation activity remained strong after one cycle of starvation but then declined with repeated cycles. Many of the cells detached with vigorous washing, but at least 30% appeared resistant to sloughing. While laboratory landfill simulations showed that four-layer composite biotarps made with two different types of geotextile could remove up to 50% of influent methane introduced at a flux rate of 22 g m{sup -2} d{sup -1}, field experiments did not yield high activity levels. Tests revealed that there were high hour-to-hour flux variations in the field, which, together with frequent rainfall events, confounded the field testing. Overall, the findings suggest that a methanotroph embedded biotarp appears to be a feasible strategy to mitigate methane emission from landfill cells, although the performance of field-tested biotarps was not robust here. Tarps will likely be best suited for spring and summer use, although the methane oxidizer population may be able to shift and adapt to lower temperatures. The starvation cycling of the tarp may require the capacity for intermittent reinoculation of the cells, although it is also possible that a subpopulation will adapt to the cycling and become dominant. Rainfall is not expected to be a major factor, because a baseline biofilm will be present to repopulate the tarp. If strong performance can be achieved and documented, the biotarp concept could be extended to include interception of other compounds beyond methane, such as volatile aromatic hydrocarbons and chlorinated solvents.

Helene Hilger; James Oliver; Jean Bogner; David Jones

2009-03-31T23:59:59.000Z

145

Coal mine methane global review  

SciTech Connect (OSTI)

This is the second edition of the Coal Mine Methane Global Overview, updated in the summer of 2008. This document contains individual, comprehensive profiles that characterize the coal and coal mine methane sectors of 33 countries - 22 methane to market partners and an additional 11 coal-producing nations. The executive summary provides summary tables that include statistics on coal reserves, coal production, methane emissions, and CMM projects activity. An International Coal Mine Methane Projects Database accompanies this overview. It contains more detailed and comprehensive information on over two hundred CMM recovery and utilization projects around the world. Project information in the database is updated regularly. This document will be updated annually. Suggestions for updates and revisions can be submitted to the Administrative Support Group and will be incorporate into the document as appropriate.

NONE

2008-07-01T23:59:59.000Z

146

Methane conversion for application in fuel cells  

SciTech Connect (OSTI)

Conventional steam reformers are large and expensive for small scale fuel cell installations. But also the high endothermicity of the reforming reaction for the production of synthesis gas is a drawback. An alternative to conventional steam reforming is the partial oxidation of methane to synthesis gas. This process is slightly exothermic. The flexibility of the process makes small scale application possible. However, the partial oxidation process seems especially attractive for application within a high temperature fuel cell, because of relatively high CO/H{sub 2}-ratio for the output gases. In this paper the results of the study on the mechanism of the partial oxidation to synthesis gas on silica-supported nickel catalysts are discussed. Moreover, a process for the partial oxidation is proposed in which air instead of oxygen can be used. Based on the results of the mechanistic study two processes for the catalytic partial oxidation are proposed and simulated using the Aspen Plus flowsheeting program with which the mass and heat balances were optimized.

Mulder, A. [Gastec N.V., Apeldoorn (Netherlands); Looy, F. van [Utrecht Univ. (Netherlands). Dept. of Inorganic Chemistry; Waveren, A. van; Wingerden, A.J.M. van

1996-12-31T23:59:59.000Z

147

Conversion of methane to higher hydrocarbons (Biomimetic catalysis of the conversion of methane to methanol). Final report  

SciTech Connect (OSTI)

In addition to inorganic catalysts that react with methane, it is well-known that a select group of aerobic soil/water bacteria called methanotrophs can efficiently and selectively utilize methane as the sole source of their energy and carbon for cellular growth. The first reaction in this metabolic pathway is catalyzed by the enzyme methane monooxygenase (MMO) forming methanol. Methanol is a technology important product from this partial oxidation of methane since it can be easily converted to liquid hydrocarbon transportation fuels (gasoline), used directly as a liquid fuel or fuel additive itself, or serve as a feedstock for chemicals production. This naturally occurring biocatalyst (MMO) is accomplishing a technologically important transformation (methane directly to methanol) for which there is currently no analogous chemical (non-biological) process. The authors approach has been to use the biocatalyst, MMO, as the initial focus in the development of discrete chemical catalysts (biomimetic complexes) for methane conversion. The advantage of this approach is that it exploits a biocatalytic system already performing a desired transformation of methane. In addition, this approach generated needed new experimental information on catalyst structure and function in order to develop new catalysts rationally and systematically. The first task is a comparative mechanistic, biochemical, and spectroscopic investigation of MMO enzyme systems. This work was directed at developing a description of the structure and function of the catalytically active sites in sufficient detail to generate a biomimetic material. The second task involves the synthesis, characterization, and chemical reactions of discrete complexes that mimic the enzymatic active site. These complexes were synthesized based on their best current understanding of the MMO active site structure.

Watkins, B.E.; Taylor, R.T.; Satcher, J.H. [and others

1993-09-01T23:59:59.000Z

148

Review article Methane production by ruminants  

E-Print Network [OSTI]

Review article Methane production by ruminants: its contribution to global warming Angela R. MOSSa of methane in the global warming scenario and to examine the contribution to atmospheric methane made by enteric fermentation, mainly by rumi- nants. Agricultural emissions of methane in the EU-15 have recently

Paris-Sud XI, Université de

149

Method of coalbed methane production  

SciTech Connect (OSTI)

This patent describes a method for producing coalbed methane from a coal seam containing coalbed methane and penetrated by at least one injection well and at least one producing well. It comprises: injecting an inert gas through the injection well and into the coal seam. The inert gas being a gas that does not react with the coal under conditions of use and that does not significantly adsorb to the coal; and producing a gas from the production well which consists essentially of the inert gas, coalbed methane, or mixtures thereof.

Puri, R.; Stein, M.H.

1989-11-28T23:59:59.000Z

150

Release of Methane from Bering Sea Sediments During the Last Glacial Period  

SciTech Connect (OSTI)

Several lines of evidence suggest that during times of elevated methane flux the sulfate-methane transition zone (SMTZ) was positioned near the sediment-water interface. We studied two cores (from 700 m and 1457 m water depth) from the Umnak Plateau region. Anomalously low d13C and high d18O in benthic and planktonic foraminifera in these cores are the consequence of diagenetic overgrowths of authigenic carbonates. There are multiple layers of authigenic-carbonate-rich sediment in these cores, and the stable isotope compositions of the carbonates are consistent with those formed during anaerobic oxidation of methane (AOM). The carbonate-rich layers are associated with biomarkers produced by methane-oxidizing archaea, archaeol and glyceryl dibiphytanyl glyceryl tetraether (GDGT). The d13C of the archaeol and certain GDGTs are isotopically depleted. These carbonate- and AOM-biomarker-rich layers were emplaced in the SMTZ during episodes when there was a high flux of methane or methane-rich fluids upward in the sediment column. The sediment methane in the Umnak Plateau region appears to have been very dynamic during the glacial period, and interacted with the ocean-atmosphere system at millennial time scales. The upper-most carbonate-rich layers are in radiocarbon-dated sediment deposited during interstitials 2 and 3, 28-20 ka, and may be associated with the climate warming during this time.

Mea Cook; Lloyd Keigwin

2007-11-30T23:59:59.000Z

151

Assessing the Efficacy of the Aerobic Methanotrophic Biofilter in Methane Hydrate Environments  

SciTech Connect (OSTI)

In October 2008 the University of California at Santa Barbara (UCSB) initiated investigations of water column methane oxidation in methane hydrate environments, through a project funded by the National Energy Technology Laboratory (NETL) entitled: assessing the efficacy of the aerobic methanotrophic biofilter in methane hydrate environments. This Final Report describes the scientific advances and discoveries made under this award as well as the importance of these discoveries in the broader context of the research area. Benthic microbial mats inhabit the sea floor in areas where reduced chemicals such as sulfide reach the more oxidizing water that overlies the sediment. We set out to investigate the role that methanotrophs play in such mats at locations where methane reaches the sea floor along with sulfide. Mats were sampled from several seep environments and multiple sets were grown in-situ at a hydrocarbon seep in the Santa Barbara Basin. Mats grown in-situ were returned to the laboratory and used to perform stable isotope probing experiments in which they were treated with 13C-enriched methane. The microbial community was analyzed, demonstrating that three or more microbial groups became enriched in methane?s carbon: methanotrophs that presumably utilize methane directly, methylotrophs that presumably consume methanol excreted by the methanotrophs, and sulfide oxidizers that presumably consume carbon dioxide released by the methanotrophs and methylotrophs. Methanotrophs reached high relative abundance in mats grown on methane, but other bacterial processes include sulfide oxidation appeared to dominate mats, indicating that methanotrophy is not a dominant process in sustaining these benthic mats, but rather a secondary function modulated by methane availability. Methane that escapes the sediment in the deep ocean typically dissolved into the overlying water where it is available to methanotrophic bacteria. We set out to better understand the efficacy of this process as a biofilter by studying the distribution of methane oxidation and disposition of methanotrophic populations in the Pacific Ocean. We investigated several environments including the basins offshore California, the continental margin off Central America, and the shallow waters around gas seeps. We succeeded in identifying the distributions of activity in these environments, identified potential physical and chemical controls on methanotrophic activity, we further revealed details about the methanotrophic communities active in these settings, and we developed new approaches to study methanotrophic communities. These findings should improve our capacity to predict the methanotrophic response in ocean waters, and further our ability to generate specific hypotheses as to the ecology and efficacy of pelagic methanotrophic communites. The discharge of methane and other hydrocarbons to Gulf of Mexico that followed the sinking of the Deepwater Horizon provided a unique opportunity to study the methanotorphic biofilter in the deep ocean environment. We set out to understand the consumption of methane and the bloom of methanotrophs resulting from this event, as a window into the regional scale release of gas hydrate under rapid warming scenarios. We found that other hydrocarbon gases, notably propane and ethane, were preferred for consumption over methane, but that methane consumption accelerated rapidly and drove the depletion of methane within a matter of months after initial release. These results revealed the identity of the responsible community, and point to the importance of the seed population in determining the rate at which a methanotrophic community is able to respond to an input of methane. Collectively, these results provide a significant advance in our understanding of the marine methanotrohic biofilter, and further provide direction and context for future investigations of this important phenomenon. This project has resulted in fourteen publications to date, with five more circulating in draft form, and several others planned.

Valentine, David

2012-09-30T23:59:59.000Z

152

Microbe-Metazoan interactions at Pacific Ocean methane seeps  

E-Print Network [OSTI]

B) and those present within methane seep Euryarchaea ( PMI,margin: the influence of methane seeps and oxygen minimumisotope signatures and methane use by New Zealand cold seep

Thurber, Andrew R

2010-01-01T23:59:59.000Z

153

MARINE BIOMASS SYSTEM: ANAEROBIC DIGESTION AND PRODUCTION OF METHANE  

E-Print Network [OSTI]

AND PRODUCTION OF METHANE Lawrence Berkeley LaboratoryDIGESTION AND PRODUCTION OF METHANE Kendall F. Haven MarkArrangement Kelp to Methane Processing Plant Schematic.

Haven, Kendall F.

2011-01-01T23:59:59.000Z

154

Microbe-metazoan interactions at Pacific Ocean methane seeps  

E-Print Network [OSTI]

B) and those present within methane seep Euryarchaea ( PMI,margin: the influence of methane seeps and oxygen minimumisotope signatures and methane use by New Zealand cold seep

Thurber, Andrew Reichmann

2010-01-01T23:59:59.000Z

155

Catalysts for conversion of methane to higher hydrocarbons  

DOE Patents [OSTI]

Catalysts for converting methane to higher hydrocarbons such as ethane and ethylene in the presence of oxygen at temperatures in the range of about 700.degree. to 900.degree. C. are described. These catalysts comprise calcium oxide or gadolinium oxide respectively promoted with about 0.025-0.4 mole and about 0.1-0.7 mole sodium pyrophosphate. A preferred reaction temperature in a range of about 800.degree. to 850.degree. C. with a preferred oxygen-to-methane ratio of about 2:1 provides an essentially constant C.sub.2 hydrocarbon yield in the range of about 12 to 19 percent over a period of time greater than about 20 hours.

Siriwardane, Ranjani V. (Morgantown, WV)

1993-01-01T23:59:59.000Z

156

Methane escape from gas hydrate systems in marine environment, and methane-driven oceanic eruptions  

E-Print Network [OSTI]

Methane escape from gas hydrate systems in marine environment, and methane-driven oceanic eruptions quantities of CH4 are stored in marine sediment in the form of methane hydrate, bubbles, and dissolved CH4 in pore water. Here I discuss the various pathways for methane to enter the ocean and atmosphere

Zhang, Youxue

157

POSSIBLE ROLE OF WETLANDS, PERMAFROST, AND METHANE HYDRATES IN THE METHANE  

E-Print Network [OSTI]

POSSIBLE ROLE OF WETLANDS, PERMAFROST, AND METHANE HYDRATES IN THE METHANE CYCLE UNDER FUTURE the available scientific literature on how natural sources and the atmospheric fate of methane may be affected by future climate change. We discuss how processes governing methane wetland emissions, per- mafrost thawing

Chappellaz, Jérôme

158

Nonequilibrium clumped isotope signals in microbial methane  

E-Print Network [OSTI]

Methane is a key component in the global carbon cycle with a wide range of anthropogenic and natural sources. Although isotopic compositions of methane have traditionally aided source identification, the abundance of its ...

Wang, David T.

159

Method for the photocatalytic conversion of methane  

DOE Patents [OSTI]

A method for converting methane to methanol is provided comprising subjecting the methane to visible light in the presence of a catalyst and an electron transfer agent. Another embodiment of the invention provides for a method for reacting methane and water to produce methanol and hydrogen comprising preparing a fluid containing methane, an electron transfer agent and a photolysis catalyst, and subjecting said fluid to visible light for an effective period of time. 3 figs.

Noceti, R.P.; Taylor, C.E.; D`Este, J.R.

1998-02-24T23:59:59.000Z

160

Method for the photocatalytic conversion of methane  

DOE Patents [OSTI]

A method for converting methane to methanol is provided comprising subjecting the methane to visible light in the presence of a catalyst and an electron transfer agent. Another embodiment of the invention provides for a method for reacting methane and water to produce methanol and hydrogen comprising preparing a fluid containing methane, an electron transfer agent and a photolysis catalyst, and subjecting said fluid to visible light for an effective period of time.

Noceti, Richard P. (Pittsburgh, PA); Taylor, Charles E. (Pittsburgh, PA); D'Este, Joseph R. (Pittsburgh, PA)

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "methane nitrous oxide" 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

Coalbed methane production case histories  

SciTech Connect (OSTI)

The production of methane gas from coal and coal-bearing rocks is one of the prime objectives of the Department of Energy's Methane Recovery from Coalbeds Project. This report contains brief description of wells that are presently producing gas from coal or coal-bearing rocks. Data from three gob gas production areas in Illinois, an in-mine horizontal borehole degasification, and eleven vertical boreholes are presented. Production charts and electric logs of the producing zones are included for some of the wells. Additional information on dry gas production from the San Juan Basin, Colorado/New Mexico and the Greater Green River Coal Region, Colorado/Wyoming is also included.

Not Available

1981-02-01T23:59:59.000Z

162

Methane adsorption on Devonian shales  

E-Print Network [OSTI]

METHANE ADSORPTION ON DEVONIAN SHALES A Thesis by FAN-CHANG LI Submitted to thc Office of Graclua4e Sturiics of texas AgiM Ulllvel'sliy in pari, ial fulfilhuent of t, hc requirements I'or t, hc degree of ii IAS'I'Elf OF SCIL'NCE December... 1992 Major Subject, : Chemical Engineering METHANE ADSORPTION ON DEVONIAN SHALES A Thesis l&y I'AN-CHANC LI Approved as to style and contcut by: A. T. 'vtratson (Chair of Commitl. ee) John C. Slattery (Member) Bruce . Hcrhcrt (Memhcr...

Li, Fan-Chang

1992-01-01T23:59:59.000Z

163

Activation of methane by transition metal-substituted aluminophosphate molecular sieves  

DOE Patents [OSTI]

Aluminophosphate molecular sieves substituted with cobalt, manganese or iron and having the AlPO.sub.4 -34 or AlPO.sub.4 -5, or related AlPO.sub.4 structure activate methane starting at approximately 350.degree. C. Between 400.degree. and 500.degree. C. and at methane pressures .ltoreq.1 atmosphere the rate of methane conversion increases steadily with typical conversion efficiencies at 500.degree. C. approaching 50% and selectivity to the production of C.sub.2+ hydrocarbons approaching 100%. The activation mechanism is based on reduction of the transition metal(III) form of the molecular sieve to the transition metal(II) form with accompanying oxidative dehydrogenation of the methane. Reoxidation of the - transition metal(II) form to the transition metal(III) form can be done either chemically (e.g., using O.sub.2) or electrochemically.

Iton, Lennox E. (Downers Grove, IL); Maroni, Victor A. (Naperville, IL)

1991-01-01T23:59:59.000Z

164

Biogeochemistry of Microbial Coal-Bed Methane  

E-Print Network [OSTI]

Biogeochemistry of Microbial Coal-Bed Methane Dariusz Strapo´c,1, Maria Mastalerz,2 Katherine, biodegradation Abstract Microbial methane accumulations have been discovered in multiple coal- bearing basins low-maturity coals with predominantly microbial methane gas or uplifted coals containing older

Macalady, Jenn

165

6, 36113626, 2006 Effects of methane  

E-Print Network [OSTI]

ACPD 6, 3611­3626, 2006 Effects of methane outgassing on the Black Sea atmosphere K. Kourtidis et a Creative Commons License. Atmospheric Chemistry and Physics Discussions Effects of methane outgassing Effects of methane outgassing on the Black Sea atmosphere K. Kourtidis et al. Title Page Abstract

Paris-Sud XI, Université de

166

2, 11971241, 2005 Control of methane  

E-Print Network [OSTI]

BGD 2, 1197­1241, 2005 Control of methane efflux at the Tommeliten seep area H. Niemann et al Biogeosciences Discussions is the access reviewed discussion forum of Biogeosciences Methane emission;BGD 2, 1197­1241, 2005 Control of methane efflux at the Tommeliten seep area H. Niemann et al. Title

Boyer, Edmond

167

What are greenhouse gases? Many chemical compounds in the atmosphere act as  

E-Print Network [OSTI]

, Michigan State University, 2 Michigan State University Extension Climate Change and Agriculture Fact Sheet greenhouse gases carbon dioxide, methane, and nitrous oxide over the past 2000 years. Data are from ice core

168

Quantifying emissions of greenhouse gases from South Asia through a targeted measurement campaign  

E-Print Network [OSTI]

Methane (CH 4 ), nitrous oxide (N20) and sulfur hexafluoride (SF6) are powerful greenhouse gases with global budgets that are well-known but regional distributions that are not adequately constrained for the purposes of ...

Ganesan, Anita Lakshmi

2013-01-01T23:59:59.000Z

169

Biological and environmental efficiency of high producing dairy systems through application of life cycle analysis  

E-Print Network [OSTI]

Dairy production systems are an important global contributor to anthropogenic greenhouse gas (GHG) emissions including methane (CH4), nitrous oxide (N2O) and carbon dioxide (CO2). Due to the role GHG play in climate ...

Ross, Stephen Alexander

2014-11-27T23:59:59.000Z

170

Methane production by attached film  

DOE Patents [OSTI]

A method for purifying wastewater of biodegradable organics by converting the organics to methane and carbon dioxide gases is disclosed, characterized by the use of an anaerobic attached film expanded bed reactor for the reaction process. Dilute organic waste material is initially seeded with a heterogeneous anaerobic bacteria population including a methane-producing bacteria. The seeded organic waste material is introduced into the bottom of the expanded bed reactor which includes a particulate support media coated with a polysaccharide film. A low-velocity upward flow of the organic waste material is established through the bed during which the attached bacterial film reacts with the organic material to produce methane and carbon dioxide gases, purified water, and a small amount of residual effluent material. The residual effluent material is filtered by the film as it flows upwardly through the reactor bed. In a preferred embodiment, partially treated effluent material is recycled from the top of the bed to the bottom of the bed for further treatment. The methane and carbon dioxide gases are then separated from the residual effluent material and purified water.

Jewell, William J. (202 Eastwood Ave., Ithaca, NY 14850)

1981-01-01T23:59:59.000Z

171

Methane generation from waste materials  

DOE Patents [OSTI]

An organic solid waste digester for producing methane from solid waste, the digester comprising a reactor vessel for holding solid waste, a sprinkler system for distributing water, bacteria, and nutrients over and through the solid waste, and a drainage system for capturing leachate that is then recirculated through the sprinkler system.

Samani, Zohrab A. (Las Cruces, NM); Hanson, Adrian T. (Las Cruces, NM); Macias-Corral, Maritza (Las Cruces, NM)

2010-03-23T23:59:59.000Z

172

Methane Digesters and Biogas Recovery - Masking the Environmental Consequences of Industrial Concentrated Livestock Production  

E-Print Network [OSTI]

Methane Digesters and Biogas Recovery-Masking theII. METHANE DIGESTERS AND BIOGAs RECOVERY- IN THE2011] METHANE DIGESTERS AND BIOGAS RECOVERY methane, and 64%

Di Camillo, Nicole G.

2011-01-01T23:59:59.000Z

173

Strategies to Optimize Microbially-Mediated Mitigation of Greenhouse Gas Emissions from Landfill Cover Soils  

SciTech Connect (OSTI)

The overall objective of this project, 'Strategies to Optimize Microbially-Mediated Mitigation of Greenhouse Gas Emissions from Landfill Cover Soils' was to develop effective, efficient, and economic methodologies by which microbial production of nitrous oxide can be minimized while also maximizing microbial consumption of methane in landfill cover soils. A combination of laboratory and field site experiments found that the addition of nitrogen and phenylacetylene stimulated in situ methane oxidation while minimizing nitrous oxide production. Molecular analyses also indicated that methane-oxidizing bacteria may play a significant role in not only removing methane, but in nitrous oxide production as well, although the contribution of ammonia-oxidizing archaea to nitrous oxide production can not be excluded at this time. Future efforts to control both methane and nitrous oxide emissions from landfills as well as from other environments (e.g., agricultural soils) should consider these issues. Finally, a methanotrophic biofiltration system was designed and modeled for the promotion of methanotrophic activity in local methane 'hotspots' such as landfills. Model results as well as economic analyses of these biofilters indicate that the use of methanotrophic biofilters for controlling methane emissions is technically feasible, and provided either the costs of biofilter construction and operation are reduced or the value of CO{sub 2} credits is increased, can also be economically attractive.

Jeremy Semrau; Sung-Woo Lee; Jeongdae Im; Sukhwan Yoon; Michael Barcelona

2010-09-30T23:59:59.000Z

174

The Methane to Markets Coal Mine Methane Subcommittee meeting  

SciTech Connect (OSTI)

The presentations (overheads/viewgraphs) include: a report from the Administrative Support Group; strategy updates from Australia, India, Italy, Mexico, Nigeria, Poland and the USA; coal mine methane update and IEA's strategy and activities; the power of VAM - technology application update; the emissions trading market; the voluntary emissions reduction market - creating profitable CMM projects in the USA; an Italian perspective towards a zero emission strategies; and the wrap-up and summary.

NONE

2008-07-01T23:59:59.000Z

175

Clay enhancement of methane, low molecular weight hydrocarbon and halocarbon conversion by methanotrophic bacteria  

DOE Patents [OSTI]

An apparatus and method for increasing the rate of oxidation of toxic vapors by methanotrophic bacteria. The toxic vapors of interest are methane and trichloroethylene. The apparatus includes a gas phase bioreactor within a closed loop pumping system or a single pass system. The methanotrophic bacteria include Methylomonas methanica, Methylosinus trichosporium, and uncharacterized environmental enrichments.

Apel, William A. (Idaho Falls, ID); Dugan, Patrick R. (Idaho Falls, ID)

1995-01-01T23:59:59.000Z

176

Nickel crystallite thermometry during methanation  

SciTech Connect (OSTI)

A magnetic method to measure the average temperature of superparamagnetic nickel crystallites has been applied during CO methanation. The method takes advantage of the temperature dependence of the low field magnetization of such catalysts; however, the adsorption of carbon monoxide and the formation of surface carbon species complicate the interpretation of results. Calibrations to account for temperature change and the adsorption of reactants are described. The calibration for the effects of CO is based on the assumption that the interaction of CO with nickel is the same for methanation and disproportionation. Interphase heat transfer calculations based on the thermometric data compare favorably with previous results from ethane hyrogenolysis, and give no indication of microscopic temperature differences between the nickel crystallites and support.

Ludlow, D.K.; Cale, T.S.

1986-01-01T23:59:59.000Z

177

Stable, Ultra-Low Residence Time Partial Oxidation  

DOE Patents [OSTI]

A process for the catalytic partial oxidation of methane in gas phase at very short residence time (800,000 to 12,000,000 hr.sup.-1) by contacting a gas stream containing methane and oxygen with a metal supported catalyst, such as platinum deposited on a ceramic monolith.

Schmidt, Lanny D. (Minneapolis, MN); Hickman, Daniel A. (Midland, MI)

1997-07-15T23:59:59.000Z

178

Modeling of Oceanic Gas Hydrate Instability and Methane Release in Response to Climate Change  

SciTech Connect (OSTI)

Paleooceanographic evidence has been used to postulate that methane from oceanic hydrates may have had a significant role in regulating global climate, implicating global oceanic deposits of methane gas hydrate as the main culprit in instances of rapid climate change that have occurred in the past. However, the behavior of contemporary oceanic methane hydrate deposits subjected to rapid temperature changes, like those predicted under future climate change scenarios, is poorly understood. To determine the fate of the carbon stored in these hydrates, we performed simulations of oceanic gas hydrate accumulations subjected to temperature changes at the seafloor and assessed the potential for methane release into the ocean. Our modeling analysis considered the properties of benthic sediments, the saturation and distribution of the hydrates, the ocean depth, the initial seafloor temperature, and for the first time, estimated the effect of benthic biogeochemical activity. The results show that shallow deposits--such as those found in arctic regions or in the Gulf of Mexico--can undergo rapid dissociation and produce significant methane fluxes of 2 to 13 mol/yr/m{sup 2} over a period of decades, and release up to 1,100 mol of methane per m{sup 2} of seafloor in a century. These fluxes may exceed the ability of the seafloor environment (via anaerobic oxidation of methane) to consume the released methane or sequester the carbon. These results will provide a source term to regional or global climate models in order to assess the coupling of gas hydrate deposits to changes in the global climate.

Reagan, Matthew; Reagan, Matthew T.; Moridis, George J.

2008-04-15T23:59:59.000Z

179

Evaluating the Effects of Organic Amendment Applications on Nitrous Oxide Emissions From Salt-Affected Soils  

E-Print Network [OSTI]

methods for examination of composting and compost, in: J.Smith (Ed. ), The US Composting Council, US Governmentto the field sites and composting facilities. I am also

Pulla Reddy Gari, Namratha

2013-01-01T23:59:59.000Z

180

On-Board Measurement of Ammonia and Nitrous Oxide Using Feedback...  

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

Resonance and Low Pressure Sampling A first set of results has found that LASAR and VLPS data in the laboratory closely correlate with real-time, in-use measurement of NH3 and NO...

Note: This page contains sample records for the topic "methane nitrous oxide" 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

Nitrous Oxide as a 1,3-Dipole: A Theoretical Study of Its Cycloaddition Mechanism  

E-Print Network [OSTI]

of N2O emissions have been identified, including biomass burning, fossil fuel combustion, industrial 200-300 times more powerful in warming potential than a molecule of carbon dioxide (CO2).6 Thus and stratospheric ozone loss, so its level should remain as low as possible, and the N2O emissions should be reduced

Nguyen, Minh Tho

182

Nitrous oxide emissions 1999 to 2009 from a global atmospheric inversion  

E-Print Network [OSTI]

N[subscript 2]O surface fluxes were estimated for 1999 to 2009 using a time-dependent Bayesian inversion technique. Observations were drawn from 5 different networks, incorporating 59 surface sites and a number of ship-based ...

Thompson, R. L.

183

Nitrous Oxide Fluxes in Turfgrass: Effects of Nitrogen Fertilization Rates and Types Dale J. Bremer*  

E-Print Network [OSTI]

) inventories are unknown. Our objectives were to: (i) measure the magnitude, seasonal patterns, and annual inventories is unknown (Bouwman et al., 1995; Kroeze, 1999). Turfgrass has historically been excluded from re- gional N2O inventories because of the assumption that urban land area is too small to make significant

184

On-Board Measurement of Ammonia and Nitrous Oxide Using Feedback Absorption  

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 SSales LLCDiesel Engines | Department of Energy 2009

185

Nitrous oxide emissions. Topical report, July 1, 1990--June 30, 1993  

SciTech Connect (OSTI)

Published N{sub 2}O emissions data for experimental studies examining large numbers of coals are generally scarce at the pilot-scale fluidized-bed combustion (FBC) level, although some data are available at the laboratory scale. The primary objective of this study was to determine the atmospheric contribution of N{sub 2}O derived from coal combustion. Additionally, the goal was to establish a comprehensive engineering model to assist in the prediction of N{sub 2}O emissions based upon operating and design considerations. To meet the overall objectives of determining the overall contribution of N{sub 2}O derived from FBC and developing an engineering model seven tasks were originally proposed. The objective of each task as originally proposed and finally executed is presented in this topical report. The seven tasks were: (1) literature survey; (2) equipment design and test plan development; (3) experimental techniques; (4) pilot-scale determination of the impacts of coal properties and operating conditions on N{sub 2}O emissions; (5) role of coal char on N{sub 2}O formation and destruction; (6) homogeneous versus heterogeneous reactions; and (7) modeling of N{sub 2}O emissions.

Collings, M.E.; Mann, M.D.

1993-12-01T23:59:59.000Z

186

Miscellaneous States Coalbed Methane Proved Reserves Revision...  

U.S. Energy Information Administration (EIA) Indexed Site

Revision Decreases (Billion Cubic Feet) Miscellaneous States Coalbed Methane Proved Reserves Revision Decreases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4...

187

,"Colorado Coalbed Methane Proved Reserves, Reserves Changes...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Colorado Coalbed Methane Proved Reserves, Reserves Changes, and Production",10,"Annual",2013,"630...

188

,"Arkansas Coalbed Methane Proved Reserves, Reserves Changes...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Arkansas Coalbed Methane Proved Reserves, Reserves Changes, and Production",10,"Annual",2013,"630...

189

,"Wyoming Coalbed Methane Proved Reserves, Reserves Changes,...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Wyoming Coalbed Methane Proved Reserves, Reserves Changes, and Production",10,"Annual",2013,"630...

190

A guide to coalbed methane operations  

SciTech Connect (OSTI)

A guide to coalbed methane production is presented. The guide provides practical information on siting, drilling, completing, and producing coalbed methane wells. Information is presented for experienced coalbed methane producers and coalbed methane operations. The information will assist in making informed decisions about producing this resource. The information is presented in nine chapters on selecting and preparing of field site, drilling and casing the wellbore, wireline logging, completing the well, fracturing coal seams, selecting production equipment and facilities, operating wells and production equipment, treating and disposing of produced water, and testing the well.

Hollub, V.A.; Schafer, P.S.

1992-01-01T23:59:59.000Z

191

,"Montana Coalbed Methane Proved Reserves, Reserves Changes,...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Montana Coalbed Methane Proved Reserves, Reserves Changes, and Production",10,"Annual",2013,"630...

192

,"Oklahoma Coalbed Methane Proved Reserves, Reserves Changes...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Oklahoma Coalbed Methane Proved Reserves, Reserves Changes, and Production",10,"Annual",2013,"630...

193

,"Virginia Coalbed Methane Proved Reserves, Reserves Changes...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Virginia Coalbed Methane Proved Reserves, Reserves Changes, and Production",10,"Annual",2013,"630...

194

CO2 Sequestration Enhances Coalbed Methane Production.  

E-Print Network [OSTI]

??Since 1980s, petroleum engineers and geologists have conducted researches on Enhanced Coalbed Methane Recovery (ECBM). During this period, many methods are introduced to enhance the (more)

Pang, Yu

2013-01-01T23:59:59.000Z

195

,"Pennsylvania Coalbed Methane Proved Reserves, Reserves Changes...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Pennsylvania Coalbed Methane Proved Reserves, Reserves Changes, and Production",10,"Annual",2013,"630...

196

,"Miscellaneous Coalbed Methane Proved Reserves, Reserves Changes...  

U.S. Energy Information Administration (EIA) Indexed Site

Coalbed Methane Proved Reserves, Reserves Changes, and Production" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Late...

197

,"Alabama Coalbed Methane Proved Reserves, Reserves Changes,...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Alabama Coalbed Methane Proved Reserves, Reserves Changes, and Production",10,"Annual",2013,"630...

198

A conduit dilation model of methane venting from lake sediments  

E-Print Network [OSTI]

Methane is a potent greenhouse gas, but its effects on Earth's climate remain poorly constrained, in part due to uncertainties in global methane fluxes to the atmosphere. An important source of atmospheric methane is the ...

Ruppel, Carolyn

199

ANALYSIS OF METHANE PRODUCING COMMUNITIES WITHIN UNDERGROUND COAL BEDS  

E-Print Network [OSTI]

ANALYSIS OF METHANE PRODUCING COMMUNITIES WITHIN UNDERGROUND COAL BEDS by Elliott Paul Barnhart ..................................................................................14 Ability of the Consortium to Produce Methane from Coal and Metabolites ................16.............................................................................................21 Coal and Methane Production

Maxwell, Bruce D.

200

Methane productivity and nutrient recovery from manure Henrik B. Mller  

E-Print Network [OSTI]

Methane productivity and nutrient recovery from manure Henrik B. Mller Danish Institute This thesis, entitled "Methane productivity and nutrient recovery from manure" is presented in partial of digested and separated products.................... 13 3. Methane productivity and greenhouse gas emissions

Note: This page contains sample records for the topic "methane nitrous oxide" 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

Mechanism of Methane Chemical Looping Combustion with Hematite Promoted with CeO2  

SciTech Connect (OSTI)

Chemical looping combustion (CLC) is a promising technology for fossil fuel combustion that produces sequestration-ready CO{sub 2} stream, reducing the energy penalty of CO{sub 2} separation from flue gases. An effective oxygen carrier for CLC will readily react with the fuel gas and will be reoxidized upon contact with oxygen. This study investigated the development of a CeO{sub 2}-promoted Fe{sub 2}O{sub 3}?hematite oxygen carrier suitable for the methane CLC process. Composition of CeO{sub 2} is between 5 and 25 wt % and is lower than what is generally used for supports in Fe{sub 2}O{sub 3} carrier preparations. The incorporation of CeO{sub 2} to the natural ore hematite strongly modifies the reduction behavior in comparison to that of CeO{sub 2} and hematite alone. Temperature-programmed reaction studies revealed that the addition of even 5 wt % CeO{sub 2} enhances the reaction capacity of the Fe{sub 2}O{sub 3} oxygen carrier by promoting the decomposition and partial oxidation of methane. Fixed-bed reactor data showed that the 5 wt % cerium oxides with 95 wt % iron oxide produce 2 times as much carbon dioxide in comparison to the sum of carbon dioxide produced when the oxides were tested separately. This effect is likely due to the reaction of CeO{sub 2} with methane forming intermediates, which are reactive for extracting oxygen from Fe{sub 2}O{sub 3} at a considerably faster rate than the rate of the direct reaction of Fe{sub 2}O{sub 3} with methane. These studies reveal that 5 wt % CeO{sub 2}/Fe{sub 2}O{sub 3} gives stable conversions over 15 reduction/oxidation cycles. Lab-scale reactor studies (pulsed mode) suggest the methane reacts initially with CeO{sub 2} lattice oxygen to form partial oxidation products (CO + H{sub 2}), which continue to react with oxygen from neighboring Fe{sub 2}O{sub 3}, leading to its complete oxidation to form CO{sub 2}. The reduced cerium oxide promotes the methane decomposition reaction to form C + H{sub 2}, which continue to react with Fe{sub 2}O{sub 3}/Fe{sub 3}O{sub 4} to form CO/CO{sub 2} and H{sub 2}O. This mechanism is supported by the characterization studies, which also suggest that the formation of carbonaceous intermediates may affect the reaction rate and selectivity of the oxygen carrier.

Miller, Duane D.; Siriwardane, Ranjani

2013-08-01T23:59:59.000Z

202

Three-dimensional model synthesis of the global methane cycle  

E-Print Network [OSTI]

39, Ehhalt, D. H. , The atmoheric cycle of methane, Tellugworld-wide increase in theric methane, 1978-1987, Science,

1991-01-01T23:59:59.000Z

203

Prediction of coalbed methane reservoir performance with type curves.  

E-Print Network [OSTI]

??Coalbed methane is an unconventional gas resource that consists of methane production from the coal seams. CBM reservoirs are dual-porosity systems that are characterized by (more)

Bhavsar, Amol Bhaskar.

2005-01-01T23:59:59.000Z

204

The Optimization of Well Spacing in a Coalbed Methane Reservoir.  

E-Print Network [OSTI]

??Numerical reservoir simulation has been used to describe mechanism of methane gas desorption process, diffusion process, and fluid flow in a coalbed methane reservoir. The (more)

Sinurat, Pahala Dominicus

2012-01-01T23:59:59.000Z

205

Diffusion Characterization of Coal for Enhanced Coalbed Methane Production.  

E-Print Network [OSTI]

??This thesis explores the concept of displacement of sorbed methane and enhancement of methane recovery by injection of CO2 into coal, while sequestering CO2. The (more)

Chhajed, Pawan

2011-01-01T23:59:59.000Z

206

Development of gas production type curves for coalbed methane reservoirs.  

E-Print Network [OSTI]

??Coalbed methane is an unconventional gas resource that consists on methane production from the coal seams. The unique coal characteristic results in a dual-porosity system. (more)

Garcia Arenas, Anangela.

2004-01-01T23:59:59.000Z

207

Direct Observation of the Active Center for Methane Dehydroaromatizati...  

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

the Active Center for Methane Dehydroaromatization Using an Ultrahigh Field 95Mo NMR Spectroscopy. Direct Observation of the Active Center for Methane Dehydroaromatization Using an...

208

Studies of the Active Sites for Methane Dehydroaromatization...  

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

the Active Sites for Methane Dehydroaromatization Using Ultrahigh-Field Solid-State Mo95 NMR Spectroscopy. Studies of the Active Sites for Methane Dehydroaromatization Using...

209

Scientists detect methane levels three times larger than expected...  

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

methane that actually preceded recent concerns about potential emissions from fracking," Dubey said. Scientists detect methane levels three times larger than expected over...

210

Coalbed Methane (CBM) is natural  

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-Up fromDepartmentTieCelebrate Earth DayFuelsDepartmentPolicyClean,Coalbed Methane (CBM)

211

The 1991 coalbed methane symposium proceedings  

SciTech Connect (OSTI)

The proceedings of the 1991 coalbed methane symposium are presented. The proceedings contains 50 papers on environmental aspects of recovering methane from coal seams, reservoir characterization and testing mine safety and productivity, coalbed stimulation, geology and resource assessment, well completion and production technologies, reservoir modeling and case histories, and resources and technology.

Not Available

1991-01-01T23:59:59.000Z

212

Department of Energy Advance Methane Hydrates Science and Technology Projects  

Broader source: Energy.gov [DOE]

Descriptions for Energy Department Methane Hydrates Science and Technology Projects, August 31, 2012

213

MARINE BIOMASS SYSTEM: ANAEROBIC DIGESTION AND PRODUCTION OF METHANE  

E-Print Network [OSTI]

University, School of Engineering, Ocean .. Engineel'ing-and nutrition, ocean engineering and methane generation. In

Haven, Kendall F.

2011-01-01T23:59:59.000Z

214

RICH METHANE PREMIXED LAMINAR FLAMES DOPED BY LIGHT UNSATURATED HYDROCARBONS  

E-Print Network [OSTI]

RICH METHANE PREMIXED LAMINAR FLAMES DOPED BY LIGHT UNSATURATED HYDROCARBONS PART I: ALLENE Full-length article SHORTENED RUNNING TITLE : METHANE FLAMES DOPED BY ALLENE OR PROPYNE * E investigated: a pure methane flame and two methane flames doped by allene and propyne, respectively. The gases

Paris-Sud XI, Université de

215

Determination of Methane Concentration Methane will be measured on the gas chromatogram using a FID (flame ionization)  

E-Print Network [OSTI]

Determination of Methane Concentration Methane will be measured on the gas chromatogram using a FID to equilibrate the methane between the air and water. · With the syringe pointing down, eject all the water fromL of gas in the syringe · We will now move to the GC lab in Starr 332 to measure methane. · Repeat

Vallino, Joseph J.

216

Formation of Liquid Methane-Water Mixture during Combustion of a Laminar Methane Jet at Supercritical Pressures  

E-Print Network [OSTI]

Formation of Liquid Methane-Water Mixture during Combustion of a Laminar Methane Jet in laminar jet flames of methane at elevated pressures in a high-pressure combustion chamber, we have MPa, after the laminar methane jet flame had been stabilized on a co-flow circular nozzle-type burner

Gülder, ?mer L.

217

Reduction of Non-CO2 Gas Emissions Through The In Situ Bioconversion of Methane  

SciTech Connect (OSTI)

The primary objectives of this research were to seek previously unidentified anaerobic methanotrophs and other microorganisms to be collected from methane seeps associated with coal outcrops. Subsurface application of these microbes into anaerobic environments has the potential to reduce methane seepage along coal outcrop belts and in coal mines, thereby preventing hazardous explosions. Depending upon the types and characteristics of the methanotrophs identified, it may be possible to apply the microbes to other sources of methane emissions, which include landfills, rice cultivation, and industrial sources where methane can accumulate under buildings. Finally, the microbes collected and identified during this research also had the potential for useful applications in the chemical industry, as well as in a variety of microbial processes. Sample collection focused on the South Fork of Texas Creek located approximately 15 miles east of Durango, Colorado. The creek is located near the subsurface contact between the coal-bearing Fruitland Formation and the underlying Pictured Cliffs Sandstone. The methane seeps occur within the creek and in areas adjacent to the creek where faulting may allow fluids and gases to migrate to the surface. These seeps appear to have been there prior to coalbed methane development as extensive microbial soils have developed. Our investigations screened more than 500 enrichments but were unable to convince us that anaerobic methane oxidation (AMO) was occurring and that anaerobic methanotrophs may not have been present in the samples collected. In all cases, visual and microscopic observations noted that the early stage enrichments contained viable microbial cells. However, as the levels of the readily substrates that were present in the environmental samples were progressively lowered through serial transfers, the numbers of cells in the enrichments sharply dropped and were eliminated. While the results were disappointing we acknowledge that anaerobic methane oxidizing (AOM) microorganisms are predominantly found in marine habitats and grow poorly under most laboratory conditions. One path for future research would be to use a small rotary rig to collect samples from deeper soil horizons, possibly adjacent to the coal-bearing horizons that may be more anaerobic.

Scott, A R; Mukhopadhyay, B; Balin, D F

2012-09-06T23:59:59.000Z

218

Hydraulic fracturing accelerates coalbed methane recovery  

SciTech Connect (OSTI)

Methane production from deep coal seams that never will be mined requires hydraulic fracturing for faster, optimal recovery. Since this can be a complex process, proper formation evaluation beforehand is essential, according to this paper.

Holditch, S.A. (Texas A and M Univ. (US)); Ely, J.W.; Semmelbeck, M.E.; Carter, R.H. (S.A. Holditch and Associates (US)); Hinkel, J.J.; Jeffrey, R.G. Jr. (Dowell Schlumberger (US))

1990-11-01T23:59:59.000Z

219

The role of methane in tropospheric chemistry  

E-Print Network [OSTI]

While methane is chemically quite inert to reactions with atmospheric molecular species, it does react with atomic species and molecular radicals. Because of its relatively large abundance in the global troposphere and ...

Golomb, D.

1989-01-01T23:59:59.000Z

220

Virginia Coalbed Methane Proved Reserves Extensions (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Extensions (Billion Cubic Feet) Virginia Coalbed Methane Proved Reserves Extensions (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

Note: This page contains sample records for the topic "methane nitrous oxide" 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

Oklahoma Coalbed Methane Proved Reserves Extensions (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Extensions (Billion Cubic Feet) Oklahoma Coalbed Methane Proved Reserves Extensions (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

222

Pennsylvania Coalbed Methane Proved Reserves Revision Decreases...  

U.S. Energy Information Administration (EIA) Indexed Site

Decreases (Billion Cubic Feet) Pennsylvania Coalbed Methane Proved Reserves Revision Decreases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

223

Virginia Coalbed Methane Proved Reserves Adjustments (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Adjustments (Billion Cubic Feet) Virginia Coalbed Methane Proved Reserves Adjustments (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

224

Arkansas Coalbed Methane Proved Reserves Adjustments (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Adjustments (Billion Cubic Feet) Arkansas Coalbed Methane Proved Reserves Adjustments (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

225

Colorado Coalbed Methane Proved Reserves Revision Increases ...  

U.S. Energy Information Administration (EIA) Indexed Site

Increases (Billion Cubic Feet) Colorado Coalbed Methane Proved Reserves Revision Increases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

226

Pennsylvania Coalbed Methane Proved Reserves Revision Increases...  

U.S. Energy Information Administration (EIA) Indexed Site

Increases (Billion Cubic Feet) Pennsylvania Coalbed Methane Proved Reserves Revision Increases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

227

Virginia Coalbed Methane Proved Reserves Revision Decreases ...  

U.S. Energy Information Administration (EIA) Indexed Site

Decreases (Billion Cubic Feet) Virginia Coalbed Methane Proved Reserves Revision Decreases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

228

Colorado Coalbed Methane Proved Reserves Extensions (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Extensions (Billion Cubic Feet) Colorado Coalbed Methane Proved Reserves Extensions (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

229

Oklahoma Coalbed Methane Proved Reserves Revision Decreases ...  

U.S. Energy Information Administration (EIA) Indexed Site

Decreases (Billion Cubic Feet) Oklahoma Coalbed Methane Proved Reserves Revision Decreases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

230

Montana Coalbed Methane Proved Reserves Adjustments (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Adjustments (Billion Cubic Feet) Montana Coalbed Methane Proved Reserves Adjustments (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

231

Wyoming Coalbed Methane Proved Reserves Acquisitions (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Acquisitions (Billion Cubic Feet) Wyoming Coalbed Methane Proved Reserves Acquisitions (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

232

Wyoming Coalbed Methane Proved Reserves Adjustments (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Adjustments (Billion Cubic Feet) Wyoming Coalbed Methane Proved Reserves Adjustments (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

233

Arkansas Coalbed Methane Proved Reserves Revision Increases ...  

U.S. Energy Information Administration (EIA) Indexed Site

Increases (Billion Cubic Feet) Arkansas Coalbed Methane Proved Reserves Revision Increases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

234

Oklahoma Coalbed Methane Proved Reserves Revision Increases ...  

U.S. Energy Information Administration (EIA) Indexed Site

Increases (Billion Cubic Feet) Oklahoma Coalbed Methane Proved Reserves Revision Increases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

235

Miscellaneous States Coalbed Methane Proved Reserves Adjustments...  

U.S. Energy Information Administration (EIA) Indexed Site

Adjustments (Billion Cubic Feet) Miscellaneous States Coalbed Methane Proved Reserves Adjustments (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6...

236

Oklahoma Coalbed Methane Proved Reserves Adjustments (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Adjustments (Billion Cubic Feet) Oklahoma Coalbed Methane Proved Reserves Adjustments (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

237

Pennsylvania Coalbed Methane Proved Reserves Extensions (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Extensions (Billion Cubic Feet) Pennsylvania Coalbed Methane Proved Reserves Extensions (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

238

Colorado Coalbed Methane Proved Reserves Adjustments (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Adjustments (Billion Cubic Feet) Colorado Coalbed Methane Proved Reserves Adjustments (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

239

Arkansas Coalbed Methane Proved Reserves Acquisitions (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Acquisitions (Billion Cubic Feet) Arkansas Coalbed Methane Proved Reserves Acquisitions (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

240

Colorado Coalbed Methane Proved Reserves Acquisitions (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Acquisitions (Billion Cubic Feet) Colorado Coalbed Methane Proved Reserves Acquisitions (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

Note: This page contains sample records for the topic "methane nitrous oxide" 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

Oklahoma Coalbed Methane Proved Reserves Acquisitions (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Acquisitions (Billion Cubic Feet) Oklahoma Coalbed Methane Proved Reserves Acquisitions (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

242

Colorado Coalbed Methane Proved Reserves Revision Decreases ...  

U.S. Energy Information Administration (EIA) Indexed Site

Decreases (Billion Cubic Feet) Colorado Coalbed Methane Proved Reserves Revision Decreases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

243

Arkansas Coalbed Methane Proved Reserves Revision Decreases ...  

U.S. Energy Information Administration (EIA) Indexed Site

Decreases (Billion Cubic Feet) Arkansas Coalbed Methane Proved Reserves Revision Decreases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

244

Virginia Coalbed Methane Proved Reserves Revision Increases ...  

U.S. Energy Information Administration (EIA) Indexed Site

Increases (Billion Cubic Feet) Virginia Coalbed Methane Proved Reserves Revision Increases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

245

Pennsylvania Coalbed Methane Proved Reserves Adjustments (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Adjustments (Billion Cubic Feet) Pennsylvania Coalbed Methane Proved Reserves Adjustments (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

246

Transient Supersonic Methane-Air Flames  

E-Print Network [OSTI]

The purpose of this study was to investigate the thermochemical properties of a transient supersonic flame. Creation of the transient flame was controlled by pulsing air in 200 millisecond intervals into a combustor filled with flowing methane...

Richards, John L.

2012-07-16T23:59:59.000Z

247

A study on coalbed methane reserve of Shanxi: Hedong coalfield reserve and its utilization  

SciTech Connect (OSTI)

Coalbed gas, i.e. coalbed methane, is considered an unconventional gas, formed during coal accumulation and preserved in coal seams. In the past, coalbed gas was considered a major hazard factor to the safety of mining and caused countless explosive events and great losses to the enterprises and even to the country. Early in 1960s and 70s, it was recognized that coalbed gas could be utilized as an energy resource and collected through tunnels in China. In 1995, the output of tunnel gas reached 500Mm{sup 3}, however, surface pumping is still at its beginning stage, test and appraisal; so far, no commercial development is being carried out in China. Hedong coalfield, situated in the west of Shanxi province and bordered by the Yellow River in the northwest and outcrop seams in the southeast, is 540km long (N-S) and 10--40 km wide (E-W) and covers an area of 17,000 km{sup 2} across 13 counties of Xinzou, Luliang, Linfen and Yuncheng prefectures. It is the No. 2 coalfield in Shanxi province and the well-known base of excellent coking coal and power coal in China. Hedong coalfield is not only rich in coal resource, but also in coalbed methane. This paper describes the geology of the coalfield (including structure, magmatic activity, coal seams and coal grade); the regularity of coalbed methane occurrence in the Hedong coalfield; the calculation of coalbed methane resource; and the use of coalbed methane for motor fuels and chemicals production. The total resource is 1468.93Gm{sup 3}. The production of motor fuels can be realized by the following processes: (a) synthetic methanol as substitute of gasoline; (b) F-T synthesis for synthetic gasoline and diesel oil; (c) Compressed natural gas as motor fuel; and (d) Liquefied natural gas as motor fuel. The production of organic chemicals is suggested with the following technology: (a) Two-stage steam reforming to convert methane to synthetic gas various organic chemicals can be produced therefrom; (b) Partial oxidation of methane to produce synthesis gas and acetylene; (c) Coalbed methane to produce hydrogen cyanide and chloromethanes; and (d) Coalbed methane to produce acrylonitrile, acetylene, ethylene, propylene and butylenes.

Kong, X.; Fan, R.; Hu, Y.; Wang, M.; Wang, M.; Chen, Z.; Li, M.; Peng, S. [Taiyuan Ke-jin Technology Development Service (China)

1997-12-31T23:59:59.000Z

248

In Situ Generation of Pd/PdO Nanoparticle Methane Combustion Catalyst: Correlation of Particle Surface Chemistry with Ignition  

E-Print Network [OSTI]

supported in fixed-bed reactors. The extensive work on the kinetics of Pd oxidation and its relation applications, the typical fixed-bed catalytic reactor approach is not possible because of the high flowIn Situ Generation of Pd/PdO Nanoparticle Methane Combustion Catalyst: Correlation of Particle

Anderson, Scott L.

249

Development of water production type curves for horizontal wells in coalbed methane reservoirs.  

E-Print Network [OSTI]

??Coalbed methane is an unconventional gas resource that consists of methane production from the coal seams. The key parameters for the evaluation of coalbed methane (more)

Burka Narayana, Praveen Kumar.

2007-01-01T23:59:59.000Z

250

Tool to predict the production performance of vertical wells in a coalbed methane reservoir.  

E-Print Network [OSTI]

??Coalbed Methane (CBM) is an unconventional gas resource that consists of methane production from coal seams. Coalbed Methane gas production is controlled be interactions of (more)

Enoh, Michael E.

2007-01-01T23:59:59.000Z

251

Methane Digesters and Biogas Recovery - Masking the Environmental Consequences of Industrial Concentrated Livestock Production  

E-Print Network [OSTI]

Methane Digesters and Biogas Recovery-Masking theII. METHANE DIGESTERS AND BIOGAs RECOVERY- IN THEEVEN BEYOND MANURE-ASSOCIATED METHANE EMISSIONS, INDUSTRIAL

Di Camillo, Nicole G.

2011-01-01T23:59:59.000Z

252

Marine methane cycle simulations for the period of early global warming  

E-Print Network [OSTI]

aspects of atmospheric methane, Global Biogeochem. Cycles 2,Budeus, Fate of vent derived methane in seawater above theHanfland, Pathways of methane in seawater: Plume spreading

Elliott, S.

2011-01-01T23:59:59.000Z

253

Hydrogen Safety Issues Compared to Safety Issues with Methane and Propane  

E-Print Network [OSTI]

Issues with Methane and Propane Michael A. Green LawrenceSAFETY ISSUES WITH METHANE AND PROPANE M. A. Green Lawrencehydrogen. Methane and propane are commonly used by ordinary

Green, Michael A.

2005-01-01T23:59:59.000Z

254

In situ reduction and evaluation of anode supported single chamber solid oxide fuel cells  

E-Print Network [OSTI]

In situ reduction and evaluation of anode supported single chamber solid oxide fuel cells D.05.118 #12;Abstract Single chamber anode-supported fuel cells are investigated under several methane under methane-to-oxygen ratio (Rmix) of 2. Anode-supported fuel cells are investigated regarding

Paris-Sud XI, Universit de

255

anaerobic methane oxidizers: Topics by E-print Network  

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

both as an energy resource and as an atmospheric contaminant contributing to the greenhouse effect Gosciences, 1A rue de la Frolerie, 45071 Orlans Cedex 2, France...

256

anaerobic methane oxidation: Topics by E-print Network  

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

both as an energy resource and as an atmospheric contaminant contributing to the greenhouse effect Gosciences, 1A rue de la Frolerie, 45071 Orlans Cedex 2, France...

257

E-Print Network 3.0 - active methane weather Sample Search Results  

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

Chemistry 48 Universitt Stuttgart Auslandsorientierter Studiengang Summary: Potential of Coalbed Methane Recovery during Active Coalmin- ing... Methane Recovery from Active...

258

Integrated autothermal reactor concepts for oxidative coupling and reforming of  

E-Print Network [OSTI]

#12;Integrated autothermal reactor concepts for oxidative coupling and reforming of methane #12-90-365-2985-3, DOI 10.3990/1.9789036529853 #12;INTEGRATED AUTOTHERMAL REACTOR CONCEPTS FOR OXIDATIVE COUPLING . . . . . . . . . . . . . . . . . . . . 31 2.5 Dual function catalyst particle . . . . . . . . . . . . . . . . . . . . . . 34 2.6 Autothermal

Twente, Universiteit

259

Numerical modeling of methane venting from lake sediments  

E-Print Network [OSTI]

The dynamics of methane transport in lake sediments control the release of methane into the water column above, and the portion that reaches the atmosphere may contribute significantly to the greenhouse effect. The observed ...

Scandella, Benjamin P. (Benjamin Paul)

2010-01-01T23:59:59.000Z

260

Conversion of methane and acetylene into gasoline range hydrocarbons  

E-Print Network [OSTI]

Conversion of methane and acetylene to higher molecular weight hydrocarbons over zeolite catalyst (HZSM-5) was studied The reaction between methane and acetylene successfully produced high molecular weight hydrocarbons, such as naphthalene, benzene...

Alkhawaldeh, Ammar

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "methane nitrous oxide" 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

Natural Gas Infrastructure R&D and Methane Emissions Mitigation...  

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

Natural Gas Infrastructure R&D and Methane Emissions Mitigation Workshop Natural Gas Infrastructure R&D and Methane Emissions Mitigation Workshop November 12, 2014 11:00AM EST to...

262

Methane Adsorption and Dissociation and Oxygen Adsorption and...  

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

Methane Adsorption and Dissociation and Oxygen Adsorption and Reaction with CO on Pd Nanoparticles on MgO(100) and on Pd(111). Methane Adsorption and Dissociation and Oxygen...

263

Diurnal variations in methane emission from rice plants  

E-Print Network [OSTI]

A greenhouse study was conducted to investigate the mechanisms causing diurnal variations in methane emission from rice plants (Oryza sativa L.). Methane emission was measured using a closed chamber system on individual rice plants at five stages...

Laskowski, Nicholas Aaron

2004-11-15T23:59:59.000Z

264

New Methane Hydrate Research: Investing in Our Energy Future...  

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

Investing in Our Energy Future August 31, 2012 - 1:37pm Addthis Methane hydrates are 3D ice-lattice structures with natural gas locked inside. If methane hydrate is either warmed...

265

SCREENING TESTS FOR IMPROVED METHANE CRACKING MATERIALS  

SciTech Connect (OSTI)

Bench scale (1 to 6 gram) methane cracking tests have been performed on a variety of pure elements, some alloys, and SAES{reg_sign} commercial getters St 101, St 198, St 707, St 737, and St 909 to determine methane cracking performance (MCP) of 5% methane in a helium carrier at 700 C, 101.3 kPa (760 torr) with a 10 sccm feed. The MCP was almost absent from some materials tested while others showed varying degrees of MCP. Re, Cr, V, Gd, and Mo powders had good MCP, but limited capacities. Nickel supported on kieselguhr (Ni/k), a Zr-Ni alloy, and the SAES{reg_sign} getters had good MCP in a helium carrier. The MCP of these same materials was suppressed in a hydrogen carrier stream and the MCP of the Zr-based materials was reduced by nitride formation when tested with a nitrogen carrier gas.

Klein, J; Jeffrey Holder, J

2007-07-16T23:59:59.000Z

266

Direct use of methane in coal liquefaction  

DOE Patents [OSTI]

This invention relates to a process for converting solid carbonaceous material, such as coal, to liquid and gaseous hydrocarbons utilizing methane, generally at a residence time of about 20-120 minutes at a temperature of 250.degree.-750.degree. C., preferably 350.degree.-450.degree. C., pressurized up to 6000 psi, and preferably in the 1000-2500 psi range, preferably directly utilizing methane 50-100% by volume in a mix of methane and hydrogen. A hydrogen donor solvent or liquid vehicle such as tetralin, tetrahydroquinoline, piperidine, and pyrolidine may be used in a slurry mix where the solvent feed is 0-100% by weight of the coal or carbonaceous feed. Carbonaceous feed material can either be natural, such as coal, wood, oil shale, petroleum, tar sands, etc., or man-made residual oils, tars, and heavy hydrocarbon residues from other processing systems.

Sundaram, Muthu S. (Shoreham, NY); Steinberg, Meyer (Melville, NY)

1987-01-01T23:59:59.000Z

267

Direct use of methane in coal liquefaction  

DOE Patents [OSTI]

This invention relates to a process for converting solid carbonaceous material, such as coal, to liquid and gaseous hydrocarbons utilizing methane, generally at a residence time of about 20 to 120 minutes at a temperature of 250 to 750/sup 0/C, preferably 350 to 450/sup 0/C, pressurized up to 6000 psi, and preferably in the 1000 to 2500 psi range, preferably directly utilizing methane 50 to 100% by volume in a mix of methane and hydrogen. A hydrogen donor solvent or liquid vehicle such as tetralin, tetrahydroquinoline, piperidine, and pyrolidine may be used in a slurry mix where the solvent feed is 0 to 100% by weight of the coal or carbonaceous feed. Carbonaceous feed material can either be natural, such as coal, wood, oil shale, petroleum, tar sands, etc., or man-made residual oils, tars, and heavy hydrocarbon residues from other processing systems. 1 fig.

Sundaram, M.S.; Steinberg, M.

1985-06-19T23:59:59.000Z

268

ARM - Oxides of Nitrogen  

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 JunDatastreamsmmcrcalgovInstrumentsruc Documentation RUC : XDCResearchWarmingMethane BackgroundFacilityOther Aircraft CampaignsOxides

269

OXIDATION OF DRY HYDROCARBONS AT HIGH-POWER DENSITY ANODES  

SciTech Connect (OSTI)

This work builds upon discoveries by the University of Pennsylvania and others pertaining to the oxidation of dry hydrocarbon fuels in high temperature solid oxide fuel cells. The work reported here was restricted primarily to dry methane and confirms that YSZ-based cells, having ceria in the anode as a catalyst and copper in the anode as a current collector, can operate on dry methane for extended periods. Thirty-three lab-scale cells of various designs were fabricated and operated under a variety of conditions. The longest-lived cell gave stable performance on dry methane at 800 C for over 305 hours. Only slight carbon deposition was noted at the completion of the test. A corresponding nickel/YSZ-based anode would have lasted for less than an hour under these test conditions (which included open circuit potential measurements) before carbon fouling essentially destroyed the cell. The best performing cell achieved 112 mW/cm{sub 2} on dry methane at 800 C. Several problems were encountered with carbon fouling and declining open circuit voltages in many of the test cells after switching from operation on hydrogen to dry methane. Although not rigorously confirmed by experimentation, the results suggested that air infiltration through less than perfect perimeter seals or pinholes in the electrolytes, or both gave rise to conditions that caused the carbon fouling and OCV decline. Small amounts of air reacting with methane in a partial oxidation reaction could produce carbon monoxide that, in turn, would deposit the carbon. If this mechanism is confirmed, it implies that near perfect hardware is required for extended operation. Some evidence was also found for the formation of electrical shorts, probably from carbon deposits bridging the electrolyte. Work with odorized methane and with methane containing 100-ppm hydrogen sulfide confirmed that copper is stable at 800 C in dry hydrocarbon fuels in the presence of sulfur. In a number of cases, but not exclusively, the performance life on dry methane with sulfur compounds was much longer than with dry methane alone. The effect of sulfur compounds in these cases appeared to correlate with inhibition of carbon deposition. Mixed results were obtained for the effect of the sulfur compounds on power density. Progress also was made in understanding the mechanisms involved in direct utilization of dry natural gas. Evidence was developed for three possible mechanisms for dry methane utilization in addition to the usually cited mechanism--direct oxidation of methane by oxygen anions. Further work is required at a fundamental level before the knowledge gained here can be translated into higher levels of performance.

K.Krist; O. Spaldon-Stewart; R. Remick

2004-03-01T23:59:59.000Z

270

Gravimetric study of adsorbed intermediates in methanation of carbon monoxide  

SciTech Connect (OSTI)

The purpose of this study is to more fully elucidate the adsorbed intermediates and mechanism involved in catalytic methanation of CO on a typical nickel methanation catalyst. Rates of adsorption and desorption of surface species and of gasification of carbon were measured gravimetrically to determine their kinetics and possible roles in methanation. 19 refs.

Gardner, D.C.; Bartholomew, C.H.

1981-08-01T23:59:59.000Z

271

Planetary and Space Science 54 (2006) 11771187 Titan's methane cycle  

E-Print Network [OSTI]

Abstract Methane is key to sustaining Titan's thick nitrogen atmosphere. However, methane is destroyed and the pressure induced opacity in the infrared, particularly by CH4­N2 and H2­N2 collisions in the troposphere), whose reaction with carbon grains or carbon dioxide in the crustal pores produces methane gas

Atreya, Sushil

272

Measurements of Methane Emissions at Natural Gas Production Sites  

E-Print Network [OSTI]

Measurements of Methane Emissions at Natural Gas Production Sites in the United States #12;Why = 21 #12;Need for Study · Estimates of methane emissions from natural gas production , from academic in assumptions in estimating emissions · Measured data for some sources of methane emissions during natural gas

Lightsey, Glenn

273

METHANE IN SUBSURFACE: MATHEMATICAL MODELING AND COMPUTATIONAL CHALLENGES  

E-Print Network [OSTI]

advanced models of adsorption occuring in coalbed methane recovery processes, and discuss the underlying methods, hysteresis, coalbed methane, mean-field equi- librium models AMS(MOS) subject classifications. 76 applications important for global climate and energy studies, namely Enhanced Coalbed Methane (ECBM) recovery

Peszynska, Malgorzata

274

An improved third order dipole moment surface for methane  

E-Print Network [OSTI]

An improved third order dipole moment surface for methane P. Cassam-Chena¨i Laboratoire J and used to calculate the rotational spectrum of methane vibrational ground state, by means. Keywords: Dipole moment surface; methane; generalized mean field configuration interaction. Suggested

Paris-Sud XI, Université de

275

Methane-assisted combustion synthesis of nanocomposite tin dioxide materials  

E-Print Network [OSTI]

Methane-assisted combustion synthesis of nanocomposite tin dioxide materials S.D. Bakrania *, C and flow conditions using methane as a supplemental fuel. The experiments were carried out at atmospheric-phase precursor for metal additives. In the methane-assisted (MA) system, the inert carrier gas was replaced

Wooldridge, Margaret S.

276

PYROLYSIS OF METHANE IN A SUPERSONIC, ARC-HEATED FLOW  

E-Print Network [OSTI]

1 PYROLYSIS OF METHANE IN A SUPERSONIC, ARC-HEATED FLOW F.K. Lu,* C.M. Roseberry, J.M. Meyers and D arc pyrolysis of methane at supersonic conditions, representative of conditions in the reformer- cate the feasibility of arc pyrolysis of methane. Introduction he high specific enthalpy of combustion

Texas at Arlington, University of

277

Methane Activation with Rhenium Catalysts. 1. Bidentate Oxygenated Ligands  

E-Print Network [OSTI]

Methane Activation with Rhenium Catalysts. 1. Bidentate Oxygenated Ligands Jason M. Gonzales, Jonas, California 90089 ReceiVed July 31, 2006 Trends in methane activation have been explored for rhenium complexes proceeds with methane activation through a barrier of less than 35 kcal mol-1 . Study

Goddard III, William A.

278

Extreme Methane Emissions from a Swiss Hydropower Reservoir  

E-Print Network [OSTI]

Extreme Methane Emissions from a Swiss Hydropower Reservoir: Contribution from Bubbling Sediments manuscript received February 3, 2010. Accepted February 15, 2010. Methane emission pathways.Methanediffusionfromthesediment was generally low and seasonally stable and did not account for the high concentration of dissolved methane

Wehrli, Bernhard

279

Monterey Bay Aquarium Research A robotic sub samples the methane  

E-Print Network [OSTI]

Monterey Bay Aquarium Research Institute A robotic sub samples the methane content of the seafloor.263 News Seafloor probe taps methane reservoir Greenhouse gas found in high abundance but risk of mass release uncertain. Nicola Jones A robotic submarine has been used to measure the amount of methane lurking

Tian, Weidong

280

Carbon and Hydrogen Isotopic Effects in Microbial Methane  

E-Print Network [OSTI]

6 Carbon and Hydrogen Isotopic Effects in Microbial Methane from Terrestrial Environments Jeffrey Chanton, Lia Chaser, Paul Glasser,Don Siegel Methane is the ultimate end-product of anaerobic respiration. Methane production via CO2 reduction does not consume CO2. Also, acetate can be written as 2CH20, so Eq. 6

Saleska, Scott

Note: This page contains sample records for the topic "methane nitrous oxide" 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

RICH METHANE PREMIXED LAMINAR FLAMES DOPED BY LIGHT UNSATURATED HYDROCARBONS  

E-Print Network [OSTI]

RICH METHANE PREMIXED LAMINAR FLAMES DOPED BY LIGHT UNSATURATED HYDROCARBONS PART III: CYCLOPENTENE-length article SHORTENED RUNNING TITLE : METHANE FLAMES DOPED BY CYCLOPENTENE * E-mail : pierre with the studies presented in the parts I and II of this paper, the structure of a laminar rich premixed methane

Paris-Sud XI, Université de

282

Methane in lakes and wetlands Microbiological production, ecosystem  

E-Print Network [OSTI]

Methane in lakes and wetlands Microbiological production, ecosystem uptake, climatological significance LAKES AND WETLANDS ­ A RELEVANT METHANE SOURCE Lakes and other wetlands are an important source of methane, the third most important greenhouse gas in the atmosphere. However, the absolute contribution

Mühlemann, Oliver

283

The Tri--methane Rearrangement: Mechanistic and Exploratory Organic  

E-Print Network [OSTI]

The Tri--methane Rearrangement: Mechanistic and Exploratory Organic Photochemistry1 Howard E zimmerman@bert.chem.wisc.edu Received May 31, 2000 ABSTRACT The di--methane rearrangement is firmly established as a mode of synthesizing three-membered-ring compounds. We now report the tri-- methane

Cirkva, Vladimir

284

METHANE SOURCES AND SINKS IN UPPER OCEAN WATERS  

E-Print Network [OSTI]

METHANE SOURCES AND SINKS IN UPPER OCEAN WATERS A DISSERTATION SUBMITTED TO THE GRADUATE DIVISION the distribution of dissolved methane in ocean surface waters were investigated. Water column and sediment trap and Antarctic waters to the oliogotrophic ocean off Hawaii. The methane concentrations in most of the surface

Luther, Douglas S.

285

Dissociation of methane under high pressure Guoying Gao,1,a  

E-Print Network [OSTI]

Dissociation of methane under high pressure Guoying Gao,1,a Artem R. Oganov,2,a Yanming Ma,1,b Hui Received 15 May 2010; accepted 18 August 2010; published online 12 October 2010 Methane is an extremely of methane under extreme conditions are of great fundamental interest. Using the ab initio evolutionary

Oganov, Artem R.

286

Tropical methane emissions: A revised view from SCIAMACHY onboard ENVISAT  

E-Print Network [OSTI]

Tropical methane emissions: A revised view from SCIAMACHY onboard ENVISAT Christian Frankenberg,1; accepted 26 June 2008; published 12 August 2008. [1] Methane retrievals from near-infrared spectra recorded spectroscopic parameters, causing a substantial overestimation of methane correlated with high water vapor

Haak, Hein

287

RICH METHANE PREMIXED LAMINAR FLAMES DOPED BY LIGHT UNSATURATED HYDROCARBONS  

E-Print Network [OSTI]

RICH METHANE PREMIXED LAMINAR FLAMES DOPED BY LIGHT UNSATURATED HYDROCARBONS PART II: 1,3-BUTADIENE-length article SHORTENED RUNNING TITLE : METHANE FLAMES DOPED BY 1,3-BUTADIENE * E-mail : Pierre of this paper, the structure of a laminar rich premixed methane flame doped with 1,3-butadiene has been

Paris-Sud XI, Université de

288

Introduction In the past two centuries, atmospheric methane  

E-Print Network [OSTI]

90 Introduction In the past two centuries, atmospheric methane (Ch4) concentrations have more than doubled. Despite the about 20o times smaller atmospheric burden of methane compared to carbon dioxide (CO2 ; IPCC 4th assessment report, 2007), because on a per molecule basis methane is a much more effective

Haak, Hein

289

Methane Production: In the United States cattle emit about 5.5 million metric tons of methane per year into the  

E-Print Network [OSTI]

Methane Production: In the United States cattle emit about 5.5 million metric tons of methane per year into the atmosphere. o Accounts for 20% of methane emissions from human sources. Globally cattle produce about 80 million metric tons of methane annually. o Accounts for 28% of global methane emissions

Toohey, Darin W.

290

Unconventional gas resources. [Eastern Gas Shales, Western Gas Sands, Coalbed Methane, Methane from Geopressured Systems  

SciTech Connect (OSTI)

This document describes the program goals, research activities, and the role of the Federal Government in a strategic plan to reduce the uncertainties surrounding the reserve potential of the unconventional gas resources, namely, the Eastern Gas Shales, the Western Gas Sands, Coalbed Methane, and methane from Geopressured Aquifers. The intent is to provide a concise overview of the program and to identify the technical activities that must be completed in the successful achievement of the objectives.

Komar, C.A. (ed.)

1980-01-01T23:59:59.000Z

291

Hydroelectric Reservoirs -the Carbon Dioxide and Methane  

E-Print Network [OSTI]

Hydroelectric Reservoirs - the Carbon Dioxide and Methane Emissions of a "Carbon Free" Energy an overview on the greenhouse gas production of hydroelectric reservoirs. The goals are to point out the main how big the greenhouse gas emissions from hydroelectric reservoirs are compared to thermo-power plants

Fischlin, Andreas

292

High Temperature Solar Splitting of Methane  

E-Print Network [OSTI]

-term commercialization opportunities #12;Why Use Solar Energy?Why Use Solar Energy? · High concentrations possible (>1000High Temperature Solar Splitting of Methane to Hydrogen and Carbon High Temperature Solar Splitting and worldwide) ­ Sufficient to power the world (if we choose to) · Advantages tradeoff against collection area

293

Methane production from ozonated pulp mill effluent  

SciTech Connect (OSTI)

A study was made of the production of methane from desugared spent sulfite liquor (SSL) reacted with ozone. The ozonated SSL was fed continuously to three anaerobic fermenters for three months as the sole source of carbon and energy. The fermenters were inoculated with anaerobic bacteria obtained from sewage sludge and acclimated for 1 month in ozonated SSL prior to continuous fermentation. Chemical and biological parameters such as COD, BOD, total sulfur content, redox potential, pH, fatty acid composition, and methane bacteria populations were monitored to determine changes in the SSL during fermentation. Methane production from ozone-treated SSL averaged 1.7 liters/ liter or 17 ml of CH/sub 4/ produced/gram of volatile solids fed. Fatty acis analysis of fermenter effluent indicated a net production of 58 mM/ liter of acetate during ozonated SSL fermentation. This acetic acid production shows future potential for further fermentation by protein-producing yeast. Although the rate of conversion of volatile solids to CH/sub 4/ in this process was not competitive with domestic or agricultural waste digesters, this study did indicate the potential benefits of ozonating organic wastes for increased methane fermentation yields.

Bremmon, C.E.; Jurgensen, M.F.; Patton, J.T.

1980-07-01T23:59:59.000Z

294

Formation and retention of methane in coal  

SciTech Connect (OSTI)

The formation and retention of methane in coalbeds was studied for ten Utah coal samples, one Colorado coal sample and eight coal samples from the Argonne Premium Coal Sample Bank.Methane gas content of the Utah and Colorado coals varied from zero to 9 cm{sup 3}/g. The Utah coals were all high volatile bituminous coals. The Colorado coal was a gassy medium volatile bituminous coal. The Argonne coals cover a range or rank from lignite to low volatile bituminous coal and were used to determine the effect of rank in laboratory studies. The methane content of six selected Utah coal seams and the Colorado coal seam was measured in situ using a special sample collection device and a bubble desorbometer. Coal samples were collected at each measurement site for laboratory analysis. The cleat and joint system was evaluated for the coal and surrounding rocks and geological conditions were noted. Permeability measurements were performed on selected samples and all samples were analyzed for proximate and ultimate analysis, petrographic analysis, {sup 13}C NMR dipolar-dephasing spectroscopy, and density analysis. The observed methane adsorption behavior was correlated with the chemical structure and physical properties of the coals.

Hucka, V.J.; Bodily, D.M.; Huang, H.

1992-05-15T23:59:59.000Z

295

Generating power with drained coal mine methane  

SciTech Connect (OSTI)

The article describes the three technologies most commonly used for generating electricity from coal mine methane: internal combustion engines, gas turbines, and microturbines. The most critical characteristics and features of these technologies, such as efficiency, output and size are highlighted. 5 refs.

NONE

2005-09-01T23:59:59.000Z

296

Technical Note Methane gas migration through geomembranes  

E-Print Network [OSTI]

coefficient of PVC, LLDPE, and HDPE geomembranes by performing the standard gas transport test (ASTM D1434). The measured methane gas permeability coefficient through a PVC geomembrane is 7.55 3 104 ml(STP).mil/m2.day thicknesses is proposed using the measured permeability coefficients for PVC, LLDPE, and HDPE geomembranes

297

Methane present in an extrasolar planet atmosphere  

E-Print Network [OSTI]

Molecules present in exoplanetary atmospheres are expected to strongly influence the atmospheric radiation balance, trace dynamical and chemical processes, and indicate the presence of disequilibrium effects. Since molecules have the potential to reveal the exoplanet atmospheric conditions and chemistry, searching for them is a high priority. The rotational-vibrational transition bands of water, carbon monoxide, and methane are anticipated to be the primary sources of non-continuum opacity in hot-Jovian planets. Since these bands overlap in wavelength, and the corresponding signatures from them are weak, decisive identification requires precision infrared spectroscopy. Here we report on a near-infrared transmission spectrum of the planet HD 189733b showing the presence of methane. Additionally, a resolved water-vapour band at 1.9 microns confirms the recent claim of water in this object. On thermochemical grounds, carbon-monoxide is expected to be abundant in the upper atmosphere of hot-Jovian exoplanets; thus the detection of methane rather than carbon-monoxide in such a hot planet could signal the presence of a horizontal chemical gradient away from the permanent dayside, or it may imply an ill-understood photochemical mechanisms that leads to an enhancement of methane.

Mark R. Swain; Gautam Vasisht; Giovanna Tinetti

2008-02-07T23:59:59.000Z

298

Enhancement of Biogenic Coalbed Methane Production and Back Injection of Coalbed Methane Co-Produced Water  

SciTech Connect (OSTI)

Biogenic methane is a common constituent in deep subsurface environments such as coalbeds and oil shale beds. Coalbed methane (CBM) makes significant contributions to world natural gas industry and CBM production continues to increase. With increasing CBM production, the production of CBM co-produced water increases, which is an environmental concern. This study investigated the feasibility in re-using CBM co-produced water and other high sodic/saline water to enhance biogenic methane production from coal and other unconventional sources, such as oil shale. Microcosms were established with the selected carbon sources which included coal, oil shale, lignite, peat, and diesel-contaminated soil. Each microcosm contained either CBM coproduced water or groundwater with various enhancement and inhibitor combinations. Results indicated that the addition of nutrients and nutrients with additional carbon can enhance biogenic methane production from coal and oil shale. Methane production from oil shale was much greater than that from coal, which is possibly due to the greater amount of available Dissolved Organic Carbon (DOC) from oil shale. Inconclusive results were observed from the other sources since the incubation period was too low. WRI is continuing studies with biogenic methane production from oil shale.

Song Jin

2007-05-31T23:59:59.000Z

299

SAES ST 909 PILOT SCALE METHANE CRACKING TESTS  

SciTech Connect (OSTI)

Pilot scale (500 gram) SAES St 909 methane cracking tests were conducted to determine material performance for tritium process applications. Tests that ran up to 1400 hours have been performed at 700 C, 202.7 kPa (1520 torr) with a 30 sccm feed of methane, with various impurities, in a 20 vol% hydrogen, balance helium, stream. A 2.5 vol% methane feed was reduced below 30 ppm for 631 hours. A feed of 1.1 vol% methane plus 1.4 vol% carbon dioxide was reduced below 30 ppm for 513 hours. The amount of carbon dioxide gettered by St 909 can be equated to an equivalent amount of methane gettered to estimate a reduced bed life for methane cracking. The effect of 0.4 vol % and 2.1 vol% nitrogen in the feed reduced the time to exceed 30 ppm methane to 362 and 45 hours, respectively, but the nitrogen equivalence to reduced methane gettering capacity was found to be dependent on the nitrogen feed composition. Decreased hydrogen concentrations increased methane getter rates while a drop of 30 C in one bed zone increased methane emissions by over a factor of 30. The impact of gettered nitrogen can be somewhat minimized if the nitrogen feed to the bed has been stopped and sufficient time given to recover the methane cracking rate.

Klein, J; Henry Sessions, H

2007-07-02T23:59:59.000Z

300

Methane Sulfonation A High-Yield Approach to the Sulfonation of  

E-Print Network [OSTI]

Methane Sulfonation A High-Yield Approach to the Sulfonation of Methane to Methanesulfonic Acid Initiated by H2O2 and a Metal Chloride** Sudip Mukhopadhyay and Alexis T. Bell* Methane is abundant reactivity of methane makes it difficult to develop commercially viable processes for methane conversion.[1

Bell, Alexis T.

Note: This page contains sample records for the topic "methane nitrous oxide" 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

RESEARCH ARTICLE -BASED ON MIR INVESTIGATIONS IN LAKE GENEVA Spatial heterogeneity of benthic methane dynamics  

E-Print Network [OSTI]

methane dynamics in the subaquatic canyons of the Rhone River Delta (Lake Geneva) S. Sollberger · J. P methane (CH4) dynam- ics from river deltas with important organic matter accumulation have been recently Methane emission Á Methane production Introduction Atmospheric methane (CH4) concentration has dramati

Wehrli, Bernhard

302

RESEARCH ARTICLE -BASED ON MIR INVESTIGATIONS IN LAKE GENEVA Spatial heterogeneity of benthic methane dynamics  

E-Print Network [OSTI]

methane dynamics in the subaquatic canyons of the Rhone River Delta (Lake Geneva) S. Sollberger · J. P Abstract Heterogeneous benthic methane (CH4) dynam- ics from river deltas with important organic matter Particle size Á Methane emission Á Methane production Introduction Atmospheric methane (CH4) concentration

Wehrli, Bernhard

303

METHANE AND ETHANE ON THE BRIGHT KUIPER BELT OBJECT 2005 FY9 M. E. Brown,1  

E-Print Network [OSTI]

METHANE AND ETHANE ON THE BRIGHT KUIPER BELT OBJECT 2005 FY9 M. E. Brown,1 K. M. Barkume,1 G. A regime and by absorption due to methane in the near-infrared. The solid methane absorption lines through the methane. These long path lengths can be parameterized as a methane grain size of approximately

Brown, Michael E.

304

Methane Hydrate Field Studies | 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 |EnergyonSupport0.pdf5 OPAM SEMIANNUAL REPORTMAMay 20Field Studies Methane Hydrate Field

305

Methane Hydrate Production Feasibility | 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 |EnergyonSupport0.pdf5 OPAM SEMIANNUAL REPORTMAMay 20Field Studies Methane Hydrate

306

Direct conversion of methane to C sub 2 's and liquid fuels  

SciTech Connect (OSTI)

The objectives of the project are to discover and evaluate novel catalytic systems for the conversion of methane or by-product light hydrocarbon gases either indirectly (through intermediate light gases rich in C{sub 2}'s) or directly to liquid hydrocarbon fuels, and to evaluate, from an engineering perspective, different conceptualized schemes. The approach is to carry out catalyst testing on several specific classes of potential catalysts for the conversion of methane selectively to C{sub 2} products. The behavior of alkaline earth/metal oxide/halide catalysts containing strontium was found to be different from the behavior of catalysts containing barium. Two approaches were pursued to avoid the heterogeneous/homogeneous mechanism in order to achieve higher C{sub 2} selectivity/methane conversion combinations. One approach was to eliminate or minimize the typical gas phase combustion chemistry and make more of the reaction occur on the surface of the catalyst by using silver. Another approach was to change the gas phase chemistry to depart from the typical combustion reaction network by using vapor-phase catalysts. The layered perovskite K{sub 2}La{sub 2}Ti{sub 3}O{sub 10} was further studied. Modifications of process and catalyst variables for LaCaMnCoO{sub 6} catalysts resulted in catalysts with superior performance. Results obtained with a literature catalyst Na{sub 2}CO{sub 3}/Pr{sub 6}O{sub 11} were better than those obtained with NaCO{sub 3}/Pr-Ce oxide or Na{sub 2}CO{sub 3}/Ag-Pr-Ce oxide. 52 refs., 15 figs., 9 tabs.

Warren, B.K.; Campbell, K.D.; Matherne, J.L.; Kinkade, N.E.

1990-03-12T23:59:59.000Z

307

Carbon dioxide adsorption and methanation on ruthenium  

SciTech Connect (OSTI)

The adsorption and methanation of carbon dioxide on a ruthenium-silica catalyst were studied using temperature-programmed desorption (TPD) and temperature-programmed reaction (TPR). Carbon dioxide adsorption was found to be activated; CO/sub 2/ adsorption increased significantly as the temperature increased from 298 to 435 K. During adsorption, some of the CO/sub 2/ dissociated to carbon monoxide and oxygen; upon hydrogen exposure at room temperature, the oxygen reacted to water. Methanation of adsorbed CO and of adsorbed CO/sub 2/, using TPR in flowing hydrogen, yielded a CH/sub 4/ peak with a peak temperature of 459 K for both adsorbates, indicating that both reactions follow the same mechanism after adsorption. This peak temperature did not change with initial surface coverage of CO, indicating that methanation is first order in CO coverage. The desorption and reaction spectra for Ru/SiO/sub 2/ were similar to those previously obtained for Ni/SiO/sub 2/, but both CO/sub 2/ formation and CH/sub 4/ formation proceeded faster on Ru. Also, the details of CO desorption and the changes in CO/sub 2/ and CO desorptions with initial coverage were different on the two metals. 5 figures, 3 tables.

Zagli, E.; Falconer, J.L.

1981-05-01T23:59:59.000Z

308

Process for separating nitrogen from methane using microchannel process technology  

DOE Patents [OSTI]

The disclosed invention relates to a process for separating methane or nitrogen from a fluid mixture comprising methane and nitrogen, the process comprising: (A) flowing the fluid mixture into a microchannel separator, the microchannel separator comprising a plurality of process microchannels containing a sorption medium, the fluid mixture being maintained in the microchannel separator until at least part of the methane or nitrogen is sorbed by the sorption medium, and removing non-sorbed parts of the fluid mixture from the microchannel separator; and (B) desorbing the methane or nitrogen from the sorption medium and removing the desorbed methane or nitrogen from the microchannel separator. The process is suitable for upgrading methane from coal mines, landfills, and other sub-quality sources.

Tonkovich, Anna Lee (Marysville, OH); Qiu, Dongming (Dublin, OH); Dritz, Terence Andrew (Worthington, OH); Neagle, Paul (Westerville, OH); Litt, Robert Dwayne (Westerville, OH); Arora, Ravi (Dublin, OH); Lamont, Michael Jay (Hilliard, OH); Pagnotto, Kristina M. (Cincinnati, OH)

2007-07-31T23:59:59.000Z

309

Process for producing methane from gas streams containing carbon monoxide and hydrogen  

DOE Patents [OSTI]

Carbon monoxide-containing gas streams are passed over a catalyst capable of catalyzing the disproportionation of carbon monoxide so as to deposit a surface layer of active surface carbon on the catalyst essentially without formation of inactive coke thereon. The surface layer is contacted with steam and is thus converted to methane and CO.sub.2, from which a relatively pure methane product may be obtained. While carbon monoxide-containing gas streams having hydrogen or water present therein can be used only the carbon monoxide available after reaction with said hydrogen or water is decomposed to form said active surface carbon. Although hydrogen or water will be converted, partially or completely, to methane that can be utilized in a combustion zone to generate heat for steam production or other energy recovery purposes, said hydrogen is selectively removed from a CO--H.sub.2 -containing feed stream by partial oxidation thereof prior to disproportionation of the CO content of said stream.

Frost, Albert C. (Congers, NY)

1980-01-01T23:59:59.000Z

310

Implications of Representative Concentration Pathway 4.5 Methane Emissions to Stabilize Radiative Forcing  

SciTech Connect (OSTI)

Increases in the abundance of methane (CH4) in the Earths atmosphere are responsible for significant radiative forcing of climate change (Forster et al., 2007; Wuebbles and Hayhoe, 2002). Since 1750, a 2.5 fold increase in atmospheric CH4 contributed 0.5 W/m2 to direct radiative forcing and an additional 0.2 W/m2 indirectly through changes in atmospheric chemistry. Next to water and carbon dioxide (CO2), methane is the most abundant greenhouse gas in the troposphere. Additionally, CH4 is significantly more effective as a greenhouse gas on a per molecule basis than is CO2, and increasing atmospheric CH4 has been second only to CO2 in radiative forcing (Forster et al., 2007). The chemical reactivity of CH4 is important to both tropospheric and stratospheric chemistry. Along with carbon monoxide, methane helps control the amount of the hydroxyl radical (OH) in the troposphere where oxidation of CH4 by OH leads to the formation of formaldehyde, carbon monoxide, and ozone.

Emanuel, William R.; Janetos, Anthony C.

2013-02-01T23:59:59.000Z

311

LANDFILL OPERATION FOR CARBON SEQUESTRATION AND MAXIMUM METHANE EMISSION CONTROL  

SciTech Connect (OSTI)

''Conventional'' waste landfills emit methane, a potent greenhouse gas, in quantities such that landfill methane is a major factor in global climate change. Controlled landfilling is a novel approach to manage landfills for rapid completion of total gas generation, maximizing gas capture and minimizing emissions of methane to the atmosphere. With controlled landfilling, methane generation is accelerated and brought to much earlier completion by improving conditions for biological processes (principally moisture levels) in the landfill. Gas recovery efficiency approaches 100% through use of surface membrane cover over porous gas recovery layers operated at slight vacuum. A field demonstration project's results at the Yolo County Central Landfill near Davis, California are, to date, highly encouraging. Two major controlled landfilling benefits would be the reduction of landfill methane emissions to minuscule levels, and the recovery of greater amounts of landfill methane energy in much shorter times than with conventional landfill practice. With the large amount of US landfill methane generated, and greenhouse potency of methane, better landfill methane control can play a substantial role in reduction of US greenhouse gas emissions.

Don Augenstein

1999-01-11T23:59:59.000Z

312

Energy Department Expands Research into Methane Hydrates, a Vast...  

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

separate project funded by the EU through Universities of Bremen (Germany) and Tromso (Norway), will assess the response of methane hydrates to environmental changes at the...

313

Biomass Gasification and Methane Digester Property Tax Exemption  

Broader source: Energy.gov [DOE]

Michigan exempts certain energy production related farm facilities from real and personal property taxes. Among exempted property are certain methane digesters, biomass gasification equipment,...

314

,"North Louisiana Coalbed Methane Proved Reserves, Reserves Changes...  

U.S. Energy Information Administration (EIA) Indexed Site

Coalbed Methane Proved Reserves, Reserves Changes, and Production" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Late...

315

,"Ohio Coalbed Methane Proved Reserves, Reserves Changes, and...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Ohio Coalbed Methane Proved Reserves, Reserves Changes, and Production",10,"Annual",2010,"630...

316

,"U.S. Coalbed Methane Proved Reserves Extensions (Billion Cubic...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","U.S. Coalbed Methane Proved Reserves Extensions (Billion Cubic Feet)",1,"Annual",2013 ,"Release...

317

Ohio Coalbed Methane Proved Reserves Revision Increases (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

W Withheld to avoid disclosure of individual company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Reserves Revision Increases...

318

Ohio Coalbed Methane Proved Reserves Adjustments (Billion Cubic...  

U.S. Energy Information Administration (EIA) Indexed Site

Available; W Withheld to avoid disclosure of individual company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Reserves Adjustments...

319

,"U.S. Coalbed Methane Proved Reserves New Field Discoveries...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","U.S. Coalbed Methane Proved Reserves New Field Discoveries (Billion Cubic Feet)",1,"Annual",201...

320

,"Kansas Coalbed Methane Proved Reserves, Reserves Changes, and...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Kansas Coalbed Methane Proved Reserves, Reserves Changes, and Production",10,"Annual",2013,"630...

Note: This page contains sample records for the topic "methane nitrous oxide" 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

Oklahoma Coalbed Methane Proved Reserves New Reservoir Discoveries...  

U.S. Energy Information Administration (EIA) Indexed Site

New Reservoir Discoveries in Old Fields (Billion Cubic Feet) Oklahoma Coalbed Methane Proved Reserves New Reservoir Discoveries in Old Fields (Billion Cubic Feet) Decade Year-0...

322

,"NM, West Coalbed Methane Proved Reserves, Reserves Changes...  

U.S. Energy Information Administration (EIA) Indexed Site

Coalbed Methane Proved Reserves, Reserves Changes, and Production" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Late...

323

WATERJETTING: A NEW DRILLING TECHNIQUE IN COALBED METHANE RESERVOIRS.  

E-Print Network [OSTI]

??WATERJETTING: A NEW DRILLING TECHNIQUE IN COALBED METHANE RESERVOIRS Applications of waterjeting to drill horizontal wells for the purpose of degassing coalbeds prior to mining (more)

Funmilayo, Gbenga M.

2010-01-01T23:59:59.000Z

324

,"U.S. Coalbed Methane Production (Billion Cubic Feet)"  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","U.S. Coalbed Methane Production (Billion Cubic Feet)",1,"Annual",2013 ,"Release Date:","124...

325

,"U.S. Coalbed Methane Proved Reserves New Reservoir Discoveries...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","U.S. Coalbed Methane Proved Reserves New Reservoir Discoveries in Old Fields (Billion Cubic...

326

,"West Virginia Coalbed Methane Proved Reserves, Reserves Changes...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","West Virginia Coalbed Methane Proved Reserves, Reserves Changes, and Production",10,"Annual",2013,"630...

327

,"New Mexico Coalbed Methane Proved Reserves, Reserves Changes...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","New Mexico Coalbed Methane Proved Reserves, Reserves Changes, and Production",10,"Annual",2013,"630...

328

,"TX, RRC District 2 Onshore Coalbed Methane Proved Reserves...  

U.S. Energy Information Administration (EIA) Indexed Site

Coalbed Methane Proved Reserves, Reserves Changes, and Production" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Late...

329

,"U.S. Coalbed Methane Proved Reserves Acquisitions (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","U.S. Coalbed Methane Proved Reserves Acquisitions (Billion Cubic Feet)",1,"Annual",2013...

330

Wyoming Coalbed Methane Proved Reserves New Reservoir Discoveries...  

U.S. Energy Information Administration (EIA) Indexed Site

New Reservoir Discoveries in Old Fields (Billion Cubic Feet) Wyoming Coalbed Methane Proved Reserves New Reservoir Discoveries in Old Fields (Billion Cubic Feet) Decade Year-0...

331

,"U.S. Coalbed Methane Proved Reserves Revision Increases (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","U.S. Coalbed Methane Proved Reserves Revision Increases (Billion Cubic Feet)",1,"Annual",2013...

332

,"U.S. Coalbed Methane Proved Reserves Adjustments (Billion Cubic...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","U.S. Coalbed Methane Proved Reserves Adjustments (Billion Cubic Feet)",1,"Annual",2013...

333

,"Utah Coalbed Methane Proved Reserves, Reserves Changes, and...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Utah Coalbed Methane Proved Reserves, Reserves Changes, and Production",10,"Annual",2013,"630...

334

,"TX, RRC District 10 Coalbed Methane Proved Reserves, Reserves...  

U.S. Energy Information Administration (EIA) Indexed Site

Coalbed Methane Proved Reserves, Reserves Changes, and Production" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Late...

335

,"TX, RRC District 4 Onshore Coalbed Methane Proved Reserves...  

U.S. Energy Information Administration (EIA) Indexed Site

Coalbed Methane Proved Reserves, Reserves Changes, and Production" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Late...

336

,"NM, East Coalbed Methane Proved Reserves, Reserves Changes...  

U.S. Energy Information Administration (EIA) Indexed Site

Coalbed Methane Proved Reserves, Reserves Changes, and Production" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Late...

337

,"TX, RRC District 3 Onshore Coalbed Methane Proved Reserves...  

U.S. Energy Information Administration (EIA) Indexed Site

Coalbed Methane Proved Reserves, Reserves Changes, and Production" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Late...

338

,"Texas Coalbed Methane Proved Reserves, Reserves Changes, and...  

U.S. Energy Information Administration (EIA) Indexed Site

Coalbed Methane Proved Reserves, Reserves Changes, and Production" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Late...

339

,"U.S. Coalbed Methane Proved Reserves Revision Decreases (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","U.S. Coalbed Methane Proved Reserves Revision Decreases (Billion Cubic Feet)",1,"Annual",2013...

340

Utah Coalbed Methane Proved Reserves New Reservoir Discoveries...  

U.S. Energy Information Administration (EIA) Indexed Site

New Reservoir Discoveries in Old Fields (Billion Cubic Feet) Utah Coalbed Methane Proved Reserves New Reservoir Discoveries in Old Fields (Billion Cubic Feet) Decade Year-0 Year-1...

Note: This page contains sample records for the topic "methane nitrous oxide" 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

UPGRADING METHANE USING ULTRA-FAST THERMAL SWING ADSORPTION  

SciTech Connect (OSTI)

The purpose of this project is to design and demonstrate an approach to upgrade low-BTU methane streams from coal mines to pipeline-quality natural gas. The objective of Phase I of the project was to assess the feasibility of upgrading low-Btu methane streams using ultra-fast thermal swing adsorption (TSA) using Velocys' modular microchannel process technology. The project is on schedule and under budget. For Task 1.1, the open literature, patent information, and vendor contacts were surveyed to identify adsorbent candidates for experimental validation and subsequent demonstration in an MPT-based ultra-fast TSA separation for methane upgrading. The leading candidates for preferential adsorption of methane over nitrogen are highly microporous carbons. A Molecular Gate{trademark} zeolite from Engelhard Corporation has emerged as a candidate. For Task 1.2, experimental evaluation of adsorbents was initiated, and data were collected on carbon (MGN-101) from PICA, Inc. This carbon demonstrated a preferential capacity for methane over nitrogen, as well as a reasonable thermal swing differential capacity for a 90% methane and 10% nitrogen mixture. A similar methane swing capacity at 2 psig was measured. The mixture composition is relevant because gob gas contains nearly 85% methane and must be purified to 97% methane for pipeline quality.

Anna Lee Tonkovich

2004-01-01T23:59:59.000Z

342

Nitrous oxide as a substitute for sulfur hexafluoride in the ANSI/ASHRAE 110 Method of hood performance evaluation .  

E-Print Network [OSTI]

??The ANSI/ASHRAE 110 Method is the standard test for laboratory hood containment performance. Sulfur hexafluoride is specified as the gas most suitable for this test (more)

Guffey, Eric J. (Eric Jemison)

2011-01-01T23:59:59.000Z

343

Nitrous oxide as a substitute for sulfur hexafluoride in the ANSI/ASHRAE 110 Method of hood performance evaluation  

E-Print Network [OSTI]

The ANSI/ASHRAE 110 Method is the standard test for laboratory hood containment performance. Sulfur hexafluoride is specified as the gas most suitable for this test and is most commonly used. Sulfur hexafluoride use has ...

Guffey, Eric J. (Eric Jemison)

2011-01-01T23:59:59.000Z

344

tall tower facility and instrumentation New coNstraiNts oN the Nitrous oxide budget of agricultural ecosystems  

E-Print Network [OSTI]

thick. The FAO classification is Chernozem. The field site has been under cultivation for the past 125. The tall tower source footprint is dominated by agricultural land use. The domi- nant crop types include measured at 100 m using a three dimensional sonic anemometer- thermometer for computation of energy, water

Minnesota, University of

345

Remote Sensing and Sea-Truth Measurements of Methane Flux to the Atmosphere (HYFLUX project)  

SciTech Connect (OSTI)

A multi-disciplinary investigation of distribution and magnitude of methane fluxes from seafloor gas hydrate deposits in the Gulf of Mexico was conducted based on results obtained from satellite synthetic aperture radar (SAR) remote sensing and from sampling conducted during a research expedition to three sites where gas hydrate occurs (MC118, GC600, and GC185). Samples of sediments, water, and air were collected from the ship and from an ROV submersible using sediments cores, niskin bottles attached to the ROV and to a rosette, and an automated sea-air interface collector. The SAR images were used to quantify the magnitude and distribution of natural oil and gas seeps that produced perennial oil slicks on the ocean surface. A total of 176 SAR images were processed using a texture classifying neural network algorithm, which segmented the ocean surface into oil-free and oil-covered water. Geostatistical analysis indicates that there are a total of 1081 seep formations distributed over the entire Gulf of Mexico basin. Oil-covered water comprised an average of 780.0 sq. km (sd 86.03) distributed with an area of 147,370 sq. km. Persistent oil and gas seeps were also detected with SAR sampling on other ocean margins located in the Black Sea, western coast of Africa, and offshore Pakistan. Analysis of sediment cores from all three sites show profiles of sulfate, sulfide, calcium and alkalinity that indicated anaerobic oxidation of methane with precipitation of authigenic carbonates. Difference among the three sampling sites may reflect the relative magnitude of methane flux. Methane concentrations in water column samples collected by ROV and rosette deployments from MC118 ranged from {approx}33,000 nM at the seafloor to {approx}12 nM in the mixed layer with isolated peaks up to {approx}13,670 nM coincident with the top of the gas hydrate stability field. Average plume methane, ethane, and propane concentrations in the mixed layer are 7, 630, and 9,540 times saturation, respectively. Based on the contemporaneous wind speeds at this site, contemporary estimates of the diffusive fluxes from the mixed layer to the atmosphere for methane, ethane, and propane are 26.5, 2.10, and 2.78 {micro}mol/m{sup 2}d, respectively. Continuous measurements of air and sea surface concentrations of methane were made to obtain high spatial and temporal resolution of the diffusive net sea-to-air fluxes. The atmospheric methane fluctuated between 1.70 ppm and 2.40 ppm during the entire cruise except for high concentrations (up to 4.01 ppm) sampled during the end of the occupation of GC600 and the transit between GC600 and GC185. Results from interpolations within the survey areas show the daily methane fluxes to the atmosphere at the three sites range from 0.744 to 300 mol d-1. Considering that the majority of seeps in the GOM are deep (>500 m), elevated CH{sub 4} concentrations in near-surface waters resulting from bubble-mediated CH4 transport in the water column are expected to be widespread in the Gulf of Mexico.

Ian MacDonald

2011-05-31T23:59:59.000Z

346

Methane production during the anaerobic decomposition of composted and raw organic refuse in simulated landfill cells  

E-Print Network [OSTI]

Methane contributes 20% annually to increases in global warming, and is explosive at concentrations of 5-15% in air. Landfills contribute 15% to total methane emissions. This study was conducted to determine the potential decrease in methane...

West, Margrit Evelyn

1995-01-01T23:59:59.000Z

347

Analysis of a direct methane conversion to high molecular weight hydrocarbons  

E-Print Network [OSTI]

Methane conversion to heavier hydrocarbons was studied using electrical furnaces and a plasma apparatus. The experiments were performed with pure methane for the electrical furnace experiments while pure methane and additions such as hydrogen...

Al-Ghafran, Moh'd. J.

2000-01-01T23:59:59.000Z

348

Contribution of oceanic gas hydrate dissociation to the formation of Arctic Ocean methane plumes  

E-Print Network [OSTI]

Potential distribution of methane hydrate in the world'sisotopic evidence for methane hydrate instability duringHendy, L.L. , and R.J. Behl, Methane hydrates in quaternary

Reagan, M.

2012-01-01T23:59:59.000Z

349

Future methane, hydroxyl, and their uncertainties: key climate and emission parameters for future predictions  

E-Print Network [OSTI]

in tropospheric ozone and methane; global 3-D model studies,hydroxyl radical and methane life- time from the Atmosphericof meteorology and emissions on methane trends, 19902004,

Holmes, C. D; Prather, M. J; Sovde, O. A; Myhre, G.

2013-01-01T23:59:59.000Z

350

Methane in lakes and wetlands -Microbiological production, ecosystem uptake, climatological significance  

E-Print Network [OSTI]

1 Methane in lakes and wetlands - Microbiological production, ecosystem Zürcher, Fortunat Joos Global methane emissions from wet ecosystems 9:50 - 10 Were tropical wetlands C4-dominated during the glacial? A view from methane

Mühlemann, Oliver

351

Methane Hydrate Dissociation by Depressurization in a Mount Elbert Sandstone Sample: Experimental Observations and Numerical Simulations  

E-Print Network [OSTI]

S.S.H. , 1987. Kinetics of Methane Hydrate Decomposition,T. J. , et al. (2007), Methane Hydrate Formation andCharting the future of methane hydrate research in the

Kneafsey, T.

2012-01-01T23:59:59.000Z

352

Methane from UV-irradiated carbonaceous chondrites under simulated Martian conditions  

E-Print Network [OSTI]

Methane from UV-irradiated carbonaceous chondrites under simulated Martian conditions Andrew C process was studied for the production of methane from carbonaceous chondrites under simulated Martian conditions. Methane evolution rates from carbonaceous chondrites were found to be positively correlated

Schuerger, Andrew C.

353

Mechanistic studies of electron transfer, complex formation, C-H bond activation, and product binding in soluble methane monooxygenase  

E-Print Network [OSTI]

Chapter 1. Soluble Methane Monooxygenase: Activation of Dioxygen and Methane The mechanisms by which soluble methane monooxygenase uses dioxygen to convert methane selectively to methanol have come into sharp focus. Diverse ...

Kopp, Daniel Arthur

2003-01-01T23:59:59.000Z

354

Development of a hydrogen generator based on the partial oxidation of natural gas integrated with PEFC  

SciTech Connect (OSTI)

As is well known, the most acknowledged process for generation of hydrogen for fuel cells is based upon the steam reforming of methane or natural gas. A valid alternative could be a process based on partial oxidation of methane, since the process is mildly exothermic and therefore not energy intensive. Consequently, great interest is expected from conversion of methane into syngas, if an autothermal, low energy intensive, compact and reliable process could be developed. This paper covers the activities, performed by CNR Institute Transformation and Storage of Energy, Messina, Italy, on theoretical and experimental studies for a compact hydrogen generator, via catalytic selective partial oxidation of methane, integrated with a PEFC (Polymer Electrolyte Fuel Cell). In particular, the project focuses the attention on methane partial oxidation via heterogeneous selective catalysts, in order to: demonstrate the basic Catalytic Selective Partial Oxidation of Methane (CSPOM) technology in a subscale prototype, equivalent to a nominal output of 5 kWe; develop the CSPOM technology for its application in electric energy production by means of fuel cells; assess, by a balance of plant analysis, and a techno-economic evaluation, the potential benefits of the CSPOM for different categories of fuel cells.

Recupero, V.; Pino, L.; Di Leonardo, R.; Lagana, M. [Inst. CNR-TAE, Messina (Italy)

1998-12-31T23:59:59.000Z

355

Exploiting coalbed methane and protecting the global environment  

SciTech Connect (OSTI)

The global climate change caused by greenhouse gases (GHGs) emission has received wide attention from all countries in the world. Global environmental protection as a common problem has confronted the human being. As a main component of coalbed methane, methane is an important factor influencing the production safety of coal mine and threatens the lives of miners. The recent research on environment science shows that methane is a very harmful GHG. Although methane gas has very little proportion in the GHGs emission and its stayed period is also very short, it has very obvious impact on the climate change. From the estimation, methane emission in the coal-mining process is only 10% of the total emission from human`s activities. As a clean energy, Methane has mature recovery technique before, during and after the process of mining. Thus, coalbed methane is the sole GHG generated in the human`s activities and being possible to be reclaimed and utilized. Compared with the global greenhouse effect of other GHGs emission abatement, coalbed methane emission abatement can be done in very low cost with many other benefits: (1) to protect global environment; (2) to improve obviously the safety of coal mine; and (3) to obtain a new kind of clean energy. Coal is the main energy in China, and coalbed contains very rich methane. According to the exploration result in recent years, about 30000{approximately}35000 billion m{sup 2} methane is contained in the coalbed below 2000 m in depth. China has formed a good development base in the field of reclamation and utilization of coalbed methane. The author hopes that wider international technical exchange and cooperation in the field will be carried out.

Yuheng, Gao

1996-12-31T23:59:59.000Z

356

Methane Digesters and Biogas Recovery - Masking the Environmental Consequences of Industrial Concentrated Livestock Production  

E-Print Network [OSTI]

DIGESTERS AND BIOGAS RECOVERY Digesters Do Not Address theMethane Digesters and Biogas Recovery-Masking theII. METHANE DIGESTERS AND BIOGAs RECOVERY- IN THE

Di Camillo, Nicole G.

2011-01-01T23:59:59.000Z

357

Development of gas production type curves for horizontal wells in coalbed methane reservoirs.  

E-Print Network [OSTI]

??Coalbed methane is an unconventional gas resource that consists of methane production from coal seams .The unique difference between CBM and conventional gas reservoirs is (more)

Nfonsam, Allen Ekahnzok.

2006-01-01T23:59:59.000Z

358

Coalbed Methane Produced Water Screening Tool for Treatment Technology and Beneficial Use 2013 Supporting Information  

E-Print Network [OSTI]

Coalbed Methane Produced Water Screening Tool for Treatment Technology and Beneficial Use 2013 1 (to sustain instream #12;Coalbed Methane Produced Water Screening Tool for Treatment Technology

359

Presentations from the March 27th - 28th Methane Hydrates Advisory...  

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

the March 27th - 28th Methane Hydrates Advisory Committee Meeting Presentations from the March 27th - 28th Methane Hydrates Advisory Committee Meeting International Gas Hydrate...

360

E-Print Network 3.0 - anthropogenic methane emissions Sample...  

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

regional assessments... and global lake methane emissions, contributing to the greenhouse effect, are poorly known. We developed... predictions of methane emissions from easily...

Note: This page contains sample records for the topic "methane nitrous oxide" 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

Methane Digesters and Biogas Recovery - Masking the Environmental Consequences of Industrial Concentrated Livestock Production  

E-Print Network [OSTI]

Methane Digesters and Biogas Recovery-Masking theII. METHANE DIGESTERS AND BIOGAs RECOVERY- IN THEA. Digesters Have Received Attention for Their Potential to

Di Camillo, Nicole G.

2011-01-01T23:59:59.000Z

362

1870 Organometallics 1994,13,1870-1877 Mechanism and Energetics for Dehydrogenation of Methane  

E-Print Network [OSTI]

1870 Organometallics 1994,13,1870-1877 Mechanism and Energetics for Dehydrogenation of Methane also activate CHI. 1. Introduction Becauseof the enormousworldwidereservesof methane (CH4)andthe

Goddard III, William A.

363

Emissions Of Greenhouse Gases From Rice Agriculture  

SciTech Connect (OSTI)

This project produced detailed data on the processes that affect methane and nitrous oxide emissions from rice agriculture and their inter-relationships. It defines the shifting roles and potential future of these gases in causing global warming and the benefits and tradeoffs of reducing emissions. The major results include: 1). Mechanisms and Processes Leading to Methane Emissions are Delineated. Our experiments have tested the standard model of methane emissions from rice fields and found new results on the processes that control the flux. A mathematical mass balance model was used to unravel the production, oxidation and transport of methane from rice. The results suggested that when large amounts of organic matter are applied, the additional flux that is observed is due to both greater production and reduced oxidation of methane. 2). Methane Emissions From China Have Been Decreasing Over the Last Two Decades. We have calculated that methane emissions from rice fields have been falling in recent decades. This decrease is particularly large in China. While some of this is due to reduced area of rice agriculture, the bigger effect is from the reduction in the emission factor which is the annual amount of methane emitted per hectare of rice. The two most important changes that cause this decreasing emission from China are the reduced use of organic amendments which have been replaced by commercial nitrogen fertilizers, and the increased practice of intermittent flooding as greater demands are placed on water resources. 3). Global Methane Emissions Have Been Constant For More Than 20 Years. While the concentrations of methane in the atmosphere have been leveling off in recent years, our studies show that this is caused by a near constant total global source of methane for the last 20 years or more. This is probably because as some anthropogenic sources have increased, others, such as the rice agriculture source, have fallen. Changes in natural emissions appear small. 4). Nitrous Oxide Emissions From Rice Fields Increase as Methane Emissions Drop. Inundated conditions favor anaerobic methane production with high emission rates and de-nitrification resulting in modest nitrous oxide emissions. Under drier conditions such as intermittent flooding, methane emissions fall and nitrous oxide emissions increase. Increased nitrogen fertilizer use increases nitrous oxide emissions and is usually accompanied by reduced organic matter applications which decreases methane emissions. These mechanisms cause a generally inverse relationship between methane and nitrous oxide emissions. Reduction of methane from rice agriculture to control global warming comes with tradeoffs with increased nitrous oxide emissions. 5). High Spatial Resolution Maps of Emissions Produced. Maps of methane and nitrous oxide emissions at a resolution of 5 min 5 min have been produced based on the composite results of this research. These maps are necessary for both scientific and policy uses.

M. Aslam K. Khalil

2009-07-16T23:59:59.000Z

364

Methane Hydrate Program Annual Report to Congress  

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 Office of Inspector General Office0-72.pdfGeorgeDoesn't32 Master EM ProjectMemoDepartmentFY 2010 Methane Hydrate

365

Formation mechanism for polycyclic aromatic hydrocarbons in methane flames  

E-Print Network [OSTI]

Formation mechanism for polycyclic aromatic hydrocarbons in methane flames K. Siegmanna) Swiss 96822 Received 24 August 1999; accepted 13 October 1999 A laminar diffusion flame of methane exhausts,7­17 coal-fired, electricity generating power plants,18,19 tobacco smoke,20 residential wood

Sattler, Klaus

366

Development of a Series of National Coalbed Methane Databases  

E-Print Network [OSTI]

Development of a Series of National Coalbed Methane Databases Mohaghegh, S. D., Nunsavathu, U Growing Interest in Coalbed Methane ­ Elevated natural gas prices ­ Demand for clean energy sources DatabaseDatabase One Location Reservoir & Sorption Collection ­ 126 Coalbed Areas ­ 34 Parameters Ordered

Mohaghegh, Shahab

367

Rapid communication Mapping urban pipeline leaks: Methane leaks across Boston  

E-Print Network [OSTI]

Rapid communication Mapping urban pipeline leaks: Methane leaks across Boston Nathan G. Phillips a of methane (CH4) in the United States. To assess pipeline emissions across a major city, we mapped CH4 leaks extraction and pipeline transmission are the largest human-derived source of emissions (EPA, 2012). However

Jackson, Robert B.

368

Photofragment imaging of methane Albert J. R. Heck  

E-Print Network [OSTI]

on CH4. © 1996 American Institute of Physics. S0021-9606 96 03810-3 INTRODUCTION Knowledge about the photo dissociation pathways of the methane molecule is of fundamental importance as it is of central, the photochemistry of methane in the atmosphere is mostly driven by intense solar atomic emission lines

Zare, Richard N.

369

The thermal decomposition of methane in a tubular reactor  

SciTech Connect (OSTI)

The reaction rate of methane decomposition using a tubular reactor having a 1 inch inside diameter with an 8 foot long heated zone was investigated in the temperature range of 700 to 900 C with pressures ranging from 28.2 to 56.1 atm. Representing the rate by a conventional model, {minus}dC{sub CH4}/dt= k1 C{sub CH4} {minus}k2 C{sub H2}{sup 2}, the rate constant k1 for methane decomposition was determined. The activation energy, 31.3 kcal/mol, calculated by an Arrhenius Plot was lower than for previously published results for methane decomposition. This result indicates that submicron particles found in the reactor adhere to the inside of the reactor and these submicron high surface area carbon particles tend to catalyze the methane decomposition. The rate constant has been found to be approximately constant at 900 C with pressure range cited above. The rate of methane decomposition increases with methane partial pressure in first-order. The rate of the methane decomposition is favored by higher temperatures and pressures while the thermochemical equilibrium of methane decomposition is favored by lower pressures. 8 refs., 7 figs., 2 tabs.

Kobayashi, Atsushi; Steinberg, M.

1992-01-01T23:59:59.000Z

370

Control of Natural Gas Catalytic Partial Oxidation for Hydrogen Generation in Fuel Cell Applications1  

E-Print Network [OSTI]

Control of Natural Gas Catalytic Partial Oxidation for Hydrogen Generation in Fuel Cell Ghosh3 , Huei Peng2 Abstract A fuel processor that reforms natural gas to hydrogen-rich mixture to feed of the hydrogen in the fuel processor is based on catalytic partial oxidation of the methane in the natural gas

Peng, Huei

371

Kinetics of methanation on nickel catalysts  

SciTech Connect (OSTI)

Extensive steady-state and transient measurements of the disproportionation of carbon monoxide, the hydrogenation of deposited carbon, and methanation of carbon monoxide were performed over 2 and 10% nickel on silica support. The results indicated that the methanation of carbon monoxide involves competitively adsorbed species; that the reaction is nearly zero order in carbon monoxide at 0.1-0.5 atm CO and 1 atm H/sub 2/, but negative at higher CO partial pressures and that it becomes less negative with increasing temperature or increasing hydrogen pressure; and that the reaction order with respect to hydrogen changes from 0.5 to 1.0 with increasing CO pressure and decreasing H/sub 2/ pressure. A reaction mechanism is proposed which consists of the molecular adsorption of CO, the dissociative adsorption of H/sub 2/, dissociation of the surface CO species, and reaction of two adsorbed hydrogen atoms with the oxygen; and a multistep hydrogenation and desorption process for the adsorbed carbon. The dissociation and reaction of adsorbed CO is probably the rate-limiting step. The kinetic behavior is best represented with the assumption of a heterogeneous catalyst surface, containing three types of sites of widely varying activity.

Ho, S.V.; Harriott, P.

1980-08-01T23:59:59.000Z

372

A STUDY ON SPHERICAL EXPANDING FLAME SPEEDS OF METHANE, ETHANE, AND METHANE/ETHANE MIXTURES AT ELEVATED PRESSURES  

E-Print Network [OSTI]

High-pressure experiments and chemical kinetics modeling were performed for laminar spherically expanding flames for methane/air, ethane/air, methane/ethane/air and propane/air mixtures at pressures between 1 and 10 atm and equivalence ratios...

De Vries, Jaap

2010-07-14T23:59:59.000Z

373

Methane Recovery from Hydrate-bearing Sediments  

SciTech Connect (OSTI)

Gas hydrates are crystalline compounds made of gas and water molecules. Methane hydrates are found in marine sediments and permafrost regions; extensive amounts of methane are trapped in the form of hydrates. Methane hydrate can be an energy resource, contribute to global warming, or cause seafloor instability. This study placed emphasis on gas recovery from hydrate bearing sediments and related phenomena. The unique behavior of hydrate-bearing sediments required the development of special research tools, including new numerical algorithms (tube- and pore-network models) and experimental devices (high pressure chambers and micromodels). Therefore, the research methodology combined experimental studies, particle-scale numerical simulations, and macro-scale analyses of coupled processes. Research conducted as part of this project started with hydrate formation in sediment pores and extended to production methods and emergent phenomena. In particular, the scope of the work addressed: (1) hydrate formation and growth in pores, the assessment of formation rate, tensile/adhesive strength and their impact on sediment-scale properties, including volume change during hydrate formation and dissociation; (2) the effect of physical properties such as gas solubility, salinity, pore size, and mixed gas conditions on hydrate formation and dissociation, and it implications such as oscillatory transient hydrate formation, dissolution within the hydrate stability field, initial hydrate lens formation, and phase boundary changes in real field situations; (3) fluid conductivity in relation to pore size distribution and spatial correlation and the emergence of phenomena such as flow focusing; (4) mixed fluid flow, with special emphasis on differences between invading gas and nucleating gas, implications on relative gas conductivity for reservoir simulations, and gas recovery efficiency; (5) identification of advantages and limitations in different gas production strategies with emphasis; (6) detailed study of CH4-CO2 exchange as a unique alternative to recover CH4 gas while sequestering CO2; (7) the relevance of fines in otherwise clean sand sediments on gas recovery and related phenomena such as fines migration and clogging, vuggy structure formation, and gas-driven fracture formation during gas production by depressurization.

J. Carlos Santamarina; Costas Tsouris

2011-04-30T23:59:59.000Z

374

EFFECTS OF WATER SPRAYS AND SCRUBBER EXHAUST ON FACE METHANE CONCENTRATIONS  

E-Print Network [OSTI]

methane levels. KEYWORDS Ventilation, water sprays, methane, coal mining, dust scrubber INTRODUCTIONChapter 65 EFFECTS OF WATER SPRAYS AND SCRUBBER EXHAUST ON FACE METHANE CONCENTRATIONS Ch.D. Taylor-mounted scrubber and water sprays can reduced methane levels at the face. The current research was conducted

Saylor, John R.

375

Goldschmidt Conference Abstracts 2010 A331 Biogenic methane potential for Surat  

E-Print Network [OSTI]

methane when native Walloon coal was provided as the sole organic carbon source. Methane generation rates]. This is the first direct evidence of real-time biogenic coal-to-methane potential for an Australian coal seam sample not produce methane from a non-native coal. Pathway and Bioavailability Results Six of the eight Surat Basin

376

Large-eddy simulation of lean hydrogenemethane turbulent premixed flames in the methane-  

E-Print Network [OSTI]

Large-eddy simulation of lean hydrogenemethane turbulent premixed flames in the methane- dominated to available experimental data. The enriched flame has 20% H2 in terms of mole fraction and lies in the methane methane flame in the methane- dominated regime. Copyright ª 2014, Hydrogen Energy Publications, LLC

Gülder, ?mer L.

377

CHEMISTRY OF METHANE AND RELATED HYDROCARBONS IN THE ATMOSPHERE OF MARS.  

E-Print Network [OSTI]

CHEMISTRY OF METHANE AND RELATED HYDROCARBONS IN THE ATMOSPHERE OF MARS. F. Lefèvre, LATMOS, Paris detection of methane on Mars [1,2,3,4] has revived the possibility of past or extant life on this planet of the recent observations of methane on Mars is that methane concentrations appear to be locally enhanced

378

Catalytic oxidation of hydrocarbons by dinuclear iron complexes  

SciTech Connect (OSTI)

Our efforts during the past eight months were directed towards characterizing synthetic complexes that model the electronic and reactivity properties of the active site of methane monooxygenase (MMO), a metalloenzyme found in methanotrophic bacteria responsible for the biological oxidation of methane to methanol. We have investigated the structural/electronic and reactivity properties of a series of dinuclear model complexes that can function as oxygen atom transfer catalysts. In particular, our studies focused on [Fe[sup 2+][sub 2](H[sub 2]Hbab)[sub 2](N-MeIm)[sub 2

Caradonna, J.P.

1992-01-01T23:59:59.000Z

379

Communication: CO oxidation by silver and gold cluster cations: Identification of different active oxygen species  

SciTech Connect (OSTI)

The oxidation of carbon monoxide with nitrous oxide on mass-selected Au{sub 3}{sup +} and Ag{sub 3}{sup +} clusters has been investigated under multicollision conditions in an octopole ion trap experiment. The comparative study reveals that for both gold and silver cations carbon dioxide is formed on the clusters. However, whereas in the case of Au{sub 3}{sup +} the cluster itself acts as reactive species that facilitates the formation of CO{sub 2} from N{sub 2}O and CO, for silver the oxidized clusters Ag{sub 3}O{sub x}{sup +} (n= 1-3) are identified as active in the CO oxidation reaction. Thus, in the case of the silver cluster cations N{sub 2}O is dissociated and one oxygen atom is suggested to directly react with CO, whereas a second kind of oxygen strongly bound to silver is acting as a substrate for the reaction.

Popolan, Denisia M.; Bernhardt, Thorsten M. [Institute of Surface Chemistry and Catalysis, University of Ulm, Albert-Einstein-Allee 47, 89069 Ulm (Germany)

2011-03-07T23:59:59.000Z

380

Transition metal-promoted oxygen ion conductors as oxidation catalyst  

SciTech Connect (OSTI)

A novel metal oxide composite catalyst for the complete oxidation of carbon monoxide and hydrocarbons was prepared by combining oxygen ion conducting materials with active transition metals. The oxygen ion conductors used were typical fluorite-type oxides, such as ceria, zirconia, and others. Active base metal catalysts, such as copper, were used as additives to promote the catalytic properties of oxygen ion conductors. The intimate contact of the two kinds of materials gave rise to a highly active oxidation catalyst. On Cu-Ce-O composite catalysts, 95% of carbon monoxide was oxidized by air at {approximately} 100 C. Complete methane oxidation on the same catalyst took place at {approximately} 550 C. When the stoichiometric amount of sulfur dioxide was sued to oxidize carbon monoxide, 96% of sulfur dioxide was reduced to elemental sulfur at temperatures above 460 C with 99% of sulfur dioxide conversion. This type of composite catalyst also showed excellent resistance to water poisoning.

Liu, W.; Sarofim, A. [Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Chemical Engineering; Flytzani-Stephanopoulos, M. [Tufts Univ., Medford, MA (United States). Dept. of Chemical Engineering

1994-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "methane nitrous oxide" 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

Winter and summer nitrous oxide and nitrogen oxides fluxes from a seasonally snow-covered subalpine meadow at Niwot Ridge, Colorado  

E-Print Network [OSTI]

of Geography, University of Colorado, Boulder, CO, USA M. W.Alpine Research, University of Colorado, Boulder, CO, USA D.Sciences, University of Colorado, Boulder, CO, USA B. Hall

2009-01-01T23:59:59.000Z

382

Single-well Modeling of Coalbed Methane Production  

E-Print Network [OSTI]

The presented study concerns the unconventional coal bed methane (CBM) fields that imply peculiarity of their evaluation. The theoretical basis of the CBM field development is briefly described, most widely known models of changes in the properties...

Martynova, Elena

2014-01-14T23:59:59.000Z

383

Direct Biological Conversion of Electrical Current into Methane by  

E-Print Network [OSTI]

electrical energy and substrate heat of combustion energy (82%) (3). One disadvantage of electrically-chamber MEC, methane was produced at anoverallenergyefficiencyof80%(electricalenergyandsubstrate heat of combustion). These results show that electrometha- nogenesis can be used to convert electrical current

384

Wyoming Coalbed Methane Proved Reserves Revision Decreases (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Decreases (Billion Cubic Feet) Wyoming Coalbed Methane Proved Reserves Revision Decreases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

385

New Mexico Coalbed Methane Proved Reserves Revision Decreases...  

U.S. Energy Information Administration (EIA) Indexed Site

Decreases (Billion Cubic Feet) New Mexico Coalbed Methane Proved Reserves Revision Decreases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

386

New Mexico Coalbed Methane Proved Reserves Adjustments (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Adjustments (Billion Cubic Feet) New Mexico Coalbed Methane Proved Reserves Adjustments (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

387

West Virginia Coalbed Methane Proved Reserves Adjustments (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Adjustments (Billion Cubic Feet) West Virginia Coalbed Methane Proved Reserves Adjustments (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

388

Oklahoma Coalbed Methane Proved Reserves Sales (Billion Cubic...  

U.S. Energy Information Administration (EIA) Indexed Site

Sales (Billion Cubic Feet) Oklahoma Coalbed Methane Proved Reserves Sales (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 2000's 6...

389

Kansas Coalbed Methane Proved Reserves Extensions (Billion Cubic...  

U.S. Energy Information Administration (EIA) Indexed Site

Extensions (Billion Cubic Feet) Kansas Coalbed Methane Proved Reserves Extensions (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9...

390

Montana Coalbed Methane Proved Reserves Revision Decreases (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Decreases (Billion Cubic Feet) Montana Coalbed Methane Proved Reserves Revision Decreases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

391

New Mexico Coalbed Methane Proved Reserves New Field Discoveries...  

U.S. Energy Information Administration (EIA) Indexed Site

Coalbed Methane Proved Reserves New Field Discoveries (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 2000's 0 2010's 0 0 0 0 - ...

392

Utah Coalbed Methane Proved Reserves New Field Discoveries (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Coalbed Methane Proved Reserves New Field Discoveries (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 2000's 0 2010's 0 0 0 0 - ...

393

Utah Coalbed Methane Proved Reserves Extensions (Billion Cubic...  

U.S. Energy Information Administration (EIA) Indexed Site

Extensions (Billion Cubic Feet) Utah Coalbed Methane Proved Reserves Extensions (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9...

394

Louisiana--North Coalbed Methane Proved Reserves Sales (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Sales (Billion Cubic Feet) Louisiana--North Coalbed Methane Proved Reserves Sales (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9...

395

Utah Coalbed Methane Proved Reserves Revision Increases (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Increases (Billion Cubic Feet) Utah Coalbed Methane Proved Reserves Revision Increases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

396

Ohio Coalbed Methane Proved Reserves Revision Decreases (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Revision Decreases (Billion Cubic Feet) Ohio Coalbed Methane Proved Reserves Revision Decreases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

397

Kansas Coalbed Methane Proved Reserves Adjustments (Billion Cubic...  

U.S. Energy Information Administration (EIA) Indexed Site

Adjustments (Billion Cubic Feet) Kansas Coalbed Methane Proved Reserves Adjustments (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

398

Wyoming Coalbed Methane Proved Reserves Extensions (Billion Cubic...  

U.S. Energy Information Administration (EIA) Indexed Site

Extensions (Billion Cubic Feet) Wyoming Coalbed Methane Proved Reserves Extensions (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9...

399

Utah Coalbed Methane Proved Reserves Adjustments (Billion Cubic...  

U.S. Energy Information Administration (EIA) Indexed Site

Adjustments (Billion Cubic Feet) Utah Coalbed Methane Proved Reserves Adjustments (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9...

400

Utah Coalbed Methane Proved Reserves Acquisitions (Billion Cubic...  

U.S. Energy Information Administration (EIA) Indexed Site

Acquisitions (Billion Cubic Feet) Utah Coalbed Methane Proved Reserves Acquisitions (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

Note: This page contains sample records for the topic "methane nitrous oxide" 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

New Mexico Coalbed Methane Proved Reserves Revision Increases...  

U.S. Energy Information Administration (EIA) Indexed Site

Increases (Billion Cubic Feet) New Mexico Coalbed Methane Proved Reserves Revision Increases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

402

Kansas Coalbed Methane Proved Reserves Revision Increases (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Increases (Billion Cubic Feet) Kansas Coalbed Methane Proved Reserves Revision Increases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

403

West Virginia Coalbed Methane Proved Reserves Revision Increases...  

U.S. Energy Information Administration (EIA) Indexed Site

Increases (Billion Cubic Feet) West Virginia Coalbed Methane Proved Reserves Revision Increases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

404

Wyoming Coalbed Methane Proved Reserves New Field Discoveries...  

U.S. Energy Information Administration (EIA) Indexed Site

Coalbed Methane Proved Reserves New Field Discoveries (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 2000's 0 2010's 0 0 0 0 - ...

405

Montana Coalbed Methane Proved Reserves Revision Increases (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Increases (Billion Cubic Feet) Montana Coalbed Methane Proved Reserves Revision Increases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

406

Wyoming Coalbed Methane Proved Reserves Revision Increases (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Increases (Billion Cubic Feet) Wyoming Coalbed Methane Proved Reserves Revision Increases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

407

Pennsylvania Coalbed Methane Proved Reserves Sales (Billion Cubic...  

U.S. Energy Information Administration (EIA) Indexed Site

Sales (Billion Cubic Feet) Pennsylvania Coalbed Methane Proved Reserves Sales (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9...

408

Wyoming Coalbed Methane Proved Reserves Sales (Billion Cubic...  

U.S. Energy Information Administration (EIA) Indexed Site

Sales (Billion Cubic Feet) Wyoming Coalbed Methane Proved Reserves Sales (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 2000's...

409

Oklahoma Coalbed Methane Proved Reserves New Field Discoveries...  

U.S. Energy Information Administration (EIA) Indexed Site

Oklahoma Coalbed Methane Proved Reserves New Field Discoveries (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 2000's 0 2010's 0 0...

410

Kansas Coalbed Methane Proved Reserves Revision Decreases (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Decreases (Billion Cubic Feet) Kansas Coalbed Methane Proved Reserves Revision Decreases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

411

Utah Coalbed Methane Proved Reserves Revision Decreases (Billion...  

U.S. Energy Information Administration (EIA) Indexed Site

Decreases (Billion Cubic Feet) Utah Coalbed Methane Proved Reserves Revision Decreases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

412

Montana Coalbed Methane Proved Reserves Extensions (Billion Cubic...  

U.S. Energy Information Administration (EIA) Indexed Site

Extensions (Billion Cubic Feet) Montana Coalbed Methane Proved Reserves Extensions (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9...

413

West Virginia Coalbed Methane Proved Reserves Revision Decreases...  

U.S. Energy Information Administration (EIA) Indexed Site

Decreases (Billion Cubic Feet) West Virginia Coalbed Methane Proved Reserves Revision Decreases (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7...

414

Colorado Coalbed Methane Proved Reserves Sales (Billion Cubic...  

U.S. Energy Information Administration (EIA) Indexed Site

Sales (Billion Cubic Feet) Colorado Coalbed Methane Proved Reserves Sales (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 2000's 0...

415

Arkansas Coalbed Methane Proved Reserves Sales (Billion Cubic...  

U.S. Energy Information Administration (EIA) Indexed Site

Sales (Billion Cubic Feet) Arkansas Coalbed Methane Proved Reserves Sales (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 2000's...

416

Utah Coalbed Methane Proved Reserves Sales (Billion Cubic Feet...  

U.S. Energy Information Administration (EIA) Indexed Site

Sales (Billion Cubic Feet) Utah Coalbed Methane Proved Reserves Sales (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 2000's 0...

417

Commodity chemicals from natural gas by methane chlorination  

SciTech Connect (OSTI)

Ethylene and vinyl chloride monomer (VCM) can be produced from natural gas through methane chlorination by reacting methane and chlorine at 900/sup 0/C or higher. Experimental results indicate total ethylene equivalent yield from methane of 45%(wt) and marginal process economics. Fundamental kinetic modeling predicts improved C/sub 2/ yields of up to 70%(wt) at optimum reaction conditions. This optimum condition established the basis for the process design study to evaluate the potential for producing ethylene and VCM from natural gas. HCl by-product is recycled for economic viability. Using the Kel-Chlor process for recycling HCl, the proposed plant produces 27,200 TPA of C/sub 2/H/sub 4/ and 383,800 TPA of VCM. The Midwest is an ethylene consumption area requiring imports of ethylene derivatives from other regions. A methane chlorination plant located on a Midwestern natural gas pipeline network has a good commercial potential.

Che, S.C.; Minet, R.G.; Giacobbe, F.; Mullick, S.L.

1987-01-01T23:59:59.000Z

418

A method for measuring methane oxidation rates using low levels of 14C-labeled methane and accelerator mass spectrometry  

E-Print Network [OSTI]

36(2):237-246. Moran, J. J. , Beal, E. J. , Vrentas, J. M. ,10.1073/ pnas.0702643105]. Beal, E. J. , C. H. House, and V.instead of sulfate (e.g. , Beal et al. 2009; Caldwell et al.

2011-01-01T23:59:59.000Z

419

Modeling pure methane hydrate dissociation using a numerical simulator from a novel combination of X-ray computed tomography and macroscopic data  

E-Print Network [OSTI]

of predicted and measured methane gas production data within the heterogeneous porous methane hydrate sample.Global Distribution of Methane Hydrate in Ocean Hydrate.

Gupta, A.

2010-01-01T23:59:59.000Z

420

Upgrading Methane Using Ultra-Fast Thermal Swing Adsorption  

SciTech Connect (OSTI)

The purpose of this project is to design and demonstrate an approach to upgrade low-BTU methane streams from coal mines to pipeline-quality natural gas. The objective of Phase I of the project was to assess the technical feasibility and cost of upgrading low-BTU methane streams using ultra-fast thermal swing adsorption (TSA) using Velocys modular microchannel process technology. The objective of Phase II is to demonstrate the process at the bench-scale. Natural gas upgrading systems have six main unit operations: feed compressor, dehydration unit, nitrogen rejection unit, deoxygenator, carbon dioxide scrubber, and a sales compressor. The NRU is the focus of the development program, and a bench-scale demonstration has been initiated. The Velocys NRU system targets producing methane with greater than 96% purity and at least 90% recovery for final commercial operation. A preliminary cost analysis of the methane upgrading system, including the Velocys NRU, suggests that costs below $2.00 per million (MM) BTU methane may be achieved. The cost for a conventional methane upgrading system is well above $2.30 per MM BTU, as benchmarked in an Environmental Protection Agency study. The project is on schedule and on budget. Task 4, a bench-scale demonstration of the ultra-fast TSA system is complete. Rapid thermal swing of an adsorbent bed using microchannels has been successfully demonstrated and the separation of a 70% methane and 30% nitrogen was purified to 92% methane. The bench-scale demonstration unit was small relative to the system dead volume for the initial phase of experiments and a purge step was added to sweep the dead volume prior to desorbing the bed and measuring purity. A technical and economic feasibility assessment was completed in Task 3. The proposed Velocys technology appears feasible for the methane upgrading market. Evaluated categories include adsorbent selection, rapid-cycle valve selection, microchannel manufacturability assessment, and system design and cost. The selected adsorbent, granular microporous carbon from either Barnaby-Sutcliffe or Calgon, experimentally demonstrated sufficient methane capacity under differential temperature at 100 pounds per square inch gauge. Several valve options were identified, including candidates that can operate millions of cycles between refurbishment. The microchannel adsorber and desorber designs were made using internal Velocys manufacturability standards, and the associated costs are acceptable as included with the complete nitrogen rejection unit (NRU) cost projection. A system design and cost estimate was completed for the NRU section of the methane upgrading system. As integrated into the complete system, the cost is in line with the market requirement.

Anna Lee Tonkovich

2005-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "methane nitrous oxide" 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

MEASURING GASEOUS EMISSIONS FROM STORED PIG SLURRY S. Espagnol1  

E-Print Network [OSTI]

2 MEASURING GASEOUS EMISSIONS FROM STORED PIG SLURRY S. Espagnol1 , L. Loyon2 , F. Guiziou2 , P to measure emissions factors of ammonia (NH3), nitrous oxide (N2O) methane (CH4) and carbon dioxide (CO2) from stored pig slurry and measured the variations of the emissions in time and space. In 2006, dynamic

Boyer, Edmond

422

GISS ICP at Columbia University SSttuuddyyiinngg GGlloobbaall CChhaannggee aanndd tthhee EEnnvviirroonnmmeenntt  

E-Print Network [OSTI]

large quantities of fossil fuels such as petroleum, coal and natural gas. Burning fossil fuels release additional greenhouse gases, such as nitrous oxide, methane and carbon dioxide into the atmosphere storage in the trees. We can study this forest carbon as well, with land-use variations (fire) as we began

423

Climate Finance 35 Understanding the Causes and  

E-Print Network [OSTI]

change issue is well un- derstood: greenhouse gases (GHG) emitted in the process of electricity #12 arises from long-lived gases (carbon dioxide, methane, halocarbons, and nitrous oxide) because half- century. Carbon dioxide from the combustion of fossil fuels (coal, oil, and natu- ral gas

Oppenheimer, Michael

424

Emissions of greenhouse gases in the United States 1995  

SciTech Connect (OSTI)

This is the fourth Energy Information Administration (EIA) annual report on US emissions of greenhouse gases. This report presents estimates of US anthropogenic (human-caused) emissions of carbon dioxide, methane, nitrous oxide, and several other greenhouse gases for 1988 through 1994. Estimates of 1995 carbon dioxide, nitrous oxide, and halocarbon emissions are also provided, although complete 1995 estimates for methane are not yet available. Emissions of carbon dioxide increased by 1.9% from 1993 to 1994 and by an additional 0.8% from 1994 to 1995. Most carbon dioxide emissions are caused by the burning of fossil fuels for energy consumption, which is strongly related to economic growth, energy prices, and weather. The US economy grew rapidly in 1994 and slowed in 1995. Estimated emissions of methane increased slightly in 1994, as a result of a rise in emissions from energy and agricultural sources. Estimated nitrous oxide emissions increased by 1.8% in 1995, primarily due to increased use of nitrogen fertilizers and higher output of chemicals linked to nitrous oxide emissions. Estimated emissions of hydrofluorocarbons (HFCs) and perfluorocarbons (PFCs), which are known to contribute to global warming, increased by nearly 11% in 1995, primarily as a result of increasing substitution for chlorofluorocarbons (CFCs). With the exception of methane, the historical emissions estimates presented in this report are only slightly revised from those in last year`s report.

NONE

1996-10-01T23:59:59.000Z

425

Climate from Layered Sediments Fossil Plankton  

E-Print Network [OSTI]

Cores #12;What is "Proxy Data"? · New Evidence for Global Warming? #12;What is a foram? #12;The: increases as temperatures increase- causes more warming ·CO2, methane, & nitrous oxide: increase as temperatures increase- causes more warming Ice Cover ·Sea ice: melts as temperature increases - Loss

Schmittner, Andreas

426

California Climate Change Center www.climatechange.ca.gov/research  

E-Print Network [OSTI]

for methane, nitrous oxide, and other non-carbon-dioxide (CO2 ) greenhouse gases, have significant--provides information on emissions, impacts, adapta- tion, and mitigation strategies. The Center was the first state works very closely with state and local agencies to make sure its scientific results are relevant

427

Climate Change Basics: Science, Adaptation, & Mitigation  

E-Print Network [OSTI]

Science Global atmospheric concentrations of carbon dioxide, methane and nitrous oxide have increased from ice cores spanning many thousands of years. The global increases in carbon dioxide concentrationClimate Change Basics: Science, Adaptation, & Mitigation with a Family Forest Perspective Baylor

Fox-Kemper, Baylor

428

ORIGINAL PAPER Adaptation and mitigation strategies in agriculture  

E-Print Network [OSTI]

distri- bution. Major contributing factors will include increasing atmospheric carbon dioxide, rising gases, chiefly carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) (IPCC 2001a). CurrentlyORIGINAL PAPER Adaptation and mitigation strategies in agriculture: an analysis of potential

429

-We sampled three replicated chambers with floating collars  

E-Print Network [OSTI]

, such as nitrous oxide (N2O), methane (CH4), and carbon dioxide (CO2). - Constructed treatment wetland systems (CWS 2003, Holland et al. 1999). Trace gas fluxes from The Tres Rios Wetlands Project in Phoenix, AZ Introduction Site Description Jorge Ramos Jr.1, Eric J. Chapman1, Nicholas A. Weller2, Dan L. Childers2 Wetland

Hall, Sharon J.

430

Formation of submicron oxide widths on aluminum in the presence of keV electron beams and CO/sub 2/ or N/sub 2/O  

SciTech Connect (OSTI)

The purpose of this paper is to report the size of oxide islands or line widths that can be grown as smaller diameter electron beams are used for the oxidation. The implications of the potential lateral resolution available between oxide lines for electronic materials are discussed. The localize dioxide growth on thin Al films occurs in the presence of .5 to 10 keV electron beams and high vacuum level pressures of carbon dioxide or nitrous oxide. Auger electron spectroscopy shows saturation of the O (KLL) signal and depletion of the Al (LMM) signal after an exposure of 5000 l carbon dioxide with a 2 keV beam of 7 A/sq. cm. The oxide is spatially restricted to the beam impact region and is stable for long periods of time in vacuum. The most plausible mechanism for this oxide growth is dissociation of the carbon dioxide or the nitrous oxide by the electron beam in the region of impingement on or near the surface. Oxygen atoms thus formed can then react with the Al, and carbon monoxide or nitrogen desorbs.

Pitts, J.R.; Massopust, T.P.; Czanderna, A.W.; Kazmerski, L.L.

1986-03-01T23:59:59.000Z

431

5616 J. Phys. Chem. 1987, 91, 5616-5623 (parent methane), 105633-27-0;6,109745-47-3;6 (parent methane),  

E-Print Network [OSTI]

5616 J. Phys. Chem. 1987, 91, 5616-5623 (parent methane), 105633-27-0;6,109745-47-3;6 (parent methane), 105633-31-6;7, 109745-48-4;8, 109745-49-5;8 (parent methane), 109745-52-0;9,109745-50-8;9 (parent methane), 105633-32-7;10, 109745-53-1;11, 109745-51-9;1,2,3,4-tetrachlorobenzene,634

Goddard III, William A.

432

Tetrahedral Symmetry for Methane The infrared spectrum of methane shows two absorptions: a bend at 1306 cm-1 and a stretch at 3019 cm-1. Demonstrate that a  

E-Print Network [OSTI]

Tetrahedral Symmetry for Methane The infrared spectrum of methane shows two absorptions: a bend symmetry for methane is consistent with this spectroscopic data. Also predict how many Raman active modes methane should have. E C3 C2 S4 A1 : x2 + y2 + z2 A2 C Td 1 1 2 3 3 1 1 1 0 0 1 1 2 1 1 1 1 0 1 1 1 1 0 1

Rioux, Frank

433

Membrane-augmented cryogenic methane/nitrogen separation  

DOE Patents [OSTI]

A membrane separation process combined with a cryogenic separation process for treating a gas stream containing methane, nitrogen and at least one other component. The membrane separation process works by preferentially permeating methane and the other component and rejecting nitrogen. The process is particularly useful in removing components such as water, carbon dioxide or C.sub.3+ hydrocarbons that might otherwise freeze and plug the cryogenic equipment.

Lokhandwala, Kaaeid (Menlo Park, CA)

1997-01-01T23:59:59.000Z

434

Membrane-augmented cryogenic methane/nitrogen separation  

DOE Patents [OSTI]

A membrane separation process is described which is combined with a cryogenic separation process for treating a gas stream containing methane, nitrogen and at least one other component. The membrane separation process works by preferentially permeating methane and the other component and rejecting nitrogen. The process is particularly useful in removing components such as water, carbon dioxide or C{sub +2} hydrocarbons that might otherwise freeze and plug the cryogenic equipment. 10 figs.

Lokhandwala, K.

1997-07-15T23:59:59.000Z

435

Proceedings of the international coalbed methane symposium. Volume 2  

SciTech Connect (OSTI)

Volume 2 contains 36 papers divided among the following sessions: Resources/development potential; Mine safety and productivity issues; Reservoir characterization, modeling, and well testing; and a Poster session whose papers discuss coal geology, well completion methods, origin of coalbed methane, rock mechanics of coal seams, geologic fractures in coal seams, and the use of coalbed methane for mitigation of greenhouse gases. All papers have been processed for inclusion on the data base.

NONE

1993-09-01T23:59:59.000Z

436

Nuclear magnetic resonance study of methane adsorbed on porous silicon  

E-Print Network [OSTI]

NUCLEAR MAGNETIC RESONANCE STUDY OF METHANE ADSORBED ON POROUS SILICON A Thesis by FENG I I Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... May 1992 Major Subject: Physics NUCLEAR MAGNETIC RESONANCE STUDY OF METHANE ADSORBED ON POROUS SILICON A Thesis by FENG LI Approved as to style and content by: . P. Kirk (Chair of Committee) i G. Agnolet (Member) J. H. Ross, r (Member) M...

Li, Feng

1992-01-01T23:59:59.000Z

437

The study of methane adsorbed on porous silicon by NMR  

E-Print Network [OSTI]

THE STUDY OF METHANE ADSORBED ON POROUS SILICON BY NMR A Thesis by ADAM KAZIMIERZ CZERMAK Submitted to the Graduate College of Texas ARM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1986... Major Subject: Physics THE STUDY OF METHANE ADSORBED ON POROUS SILICON BY NMR A Thesis by ADAM KAZIMIERZ CZERMAK Approved as to style and content by: e Wile . Kirk (Chairman of Committee) J eevak M. Par pi a (Member) Randall L. Geiger...

Czermak, Adam Kazimierz

1986-01-01T23:59:59.000Z

438

Velocity of sound in solid methane near melting temperatures  

E-Print Network [OSTI]

VELOCITY OF SOUND IN SOLID METHANE NEAR MELTING TEMPERATURES A Thesis By JOHN MARTIN WHITEHEAD Submitted to the Graduate College of the Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May... 1968 Ma)or Sub)ect: Physics VELOCITY OF SOVND IN SOLID METHANE NEAR MELTING TEMPERATURES A Thesis By JOHN MARTIN WHITEHEAD Approved as to style and content by& (Chairman of Committee) (Head of Departsmnt) (Mem er (Member) May 1968...

Whitehead, John Martin

1968-01-01T23:59:59.000Z

439

Two dimensional properties of methane adsorbed on porous silicon  

E-Print Network [OSTI]

TWO DIMENSIONAL PROPERTIES OF METHANE ADSORBED ON POROUS SILICON A Thesis by RICHARD FRANKLIN TENNIS Submitted to the Office of Graduate Studies of Texas ASM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 1989 Major Subject: Physics TWO DIMENSIONAL PROPERTIES OF METHANE ADSORBED ON POROUS SILICON A Thesis by RICHARD FRANKLIN TENNIS Approved as to style and content by: P. Kirk (C ir of Committee) Glenn olet (M er) Da J. Ernst...

Tennis, Richard Franklin

1989-01-01T23:59:59.000Z

440

Source Characterization and Temporal Variation of Methane Seepage from Thermokarst Lakes on the Alaska North Slope in Response to Arctic Climate Change  

SciTech Connect (OSTI)

The goals of this research were to characterize the source, magnitude and temporal variability of methane seepage from thermokarst lakes (TKL) within the Alaska North Slope gas hydrate province, assess the vulnerability of these areas to ongoing and future arctic climate change and determine if gas hydrate dissociation resulting from permafrost melting is contributing to the current lake emissions. Analyses were focused on four main lake locations referred to in this report: Lake Qalluuraq (referred to as Lake Q) and Lake Teshekpuk (both on Alaska?s North Slope) and Lake Killarney and Goldstream Bill Lake (both in Alaska?s interior). From analyses of gases coming from lakes in Alaska, we showed that ecological seeps are common in Alaska and they account for a larger source of atmospheric methane today than geologic subcap seeps. Emissions from the geologic source could increase with potential implications for climate warming feedbacks. Our analyses of TKL sites showing gas ebullition were complemented with geophysical surveys, providing important insight about the distribution of shallow gas in the sediments and the lake bottom manifestation of seepage (e.g., pockmarks). In Lake Q, Chirp data were limited in their capacity to image deeper sediments and did not capture the thaw bulb. The failure to capture the thaw bulb at Lake Q may in part be related to the fact that the present day lake is a remnant of an older, larger, and now-partially drained lake. These suggestions are consistent with our analyses of a dated core of sediment from the lake that shows that a wetland has been present at the site of Lake Q since approximately 12,000 thousand years ago. Chemical analyses of the core indicate that the availability of methane at the site has changed during the past and is correlated with past environmental changes (i.e. temperature and hydrology) in the Arctic. Discovery of methane seeps in Lake Teshekpuk in the northernmost part of the lake during 2009 reconnaissance surveys provided a strong impetus to visit this area in 2010. The seismic methods applied in Lake Teshekpuk were able to image pockmarks, widespread shallow gas in the sediments, and the relationship among different sediment packages on the lake?s bottom, but even boomer seismics did not detect permafrost beneath the northern part of the lake. By characterizing the biogeochemistry of shallow TKL with methane seeps we showed that the radical seasonal shifts in ice cover and temperature. These seasonal environmental differences result in distinct consumption and production processes of biologically-relevant compounds. The combined effects of temperature, ice-volume and other lithological factors linked to seepage from the lake are manifest in the distribution of sedimentary methane in Lake Q during icecovered and ice-free conditions. The biogeochemistry results illustrated very active methanotrophy in TKLs. Substantial effort was subsequently made to characterize the nature of methanotrophic communities in TKLs. We applied stable isotope probing approaches to genetically characterize the methanotrophs most active in utilizing methane in TKLs. Our study is the first to identify methane oxidizing organisms active in arctic TKLs, and revealing that type I methanotrophs and type II methanotrophs are abundant and active in assimilating methane in TKLs. These organisms play an important role in limiting the flux of methane from these sites. Our investigations indicate that as temperatures increase in the Arctic, oxidation rates and active methanotrophic populations will also shift. Whether these changes can offset predicted increases in methanogenesis is an important question underlying models of future methane flux and resultant climate change. Overall our findings indicate that TKLs and their ability to act as both source and sink of methane are exceedingly sensitive to environmental change.

None

2012-09-30T23:59:59.000Z

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441

Coalbed methane resource potential of the Piceance Basin, northwestern Colorado  

SciTech Connect (OSTI)

As predicted, from an evolving coalbed methane producibility model, prolific coalbed methane production is precluded in the Piceance Basin by the absence of coal bed reservoir continuity and dynamic ground-water flow. The best potential for production may lie at the transition zone from hydropressure to hydrocarbon overpressure and/or in conventional traps basinward of where outcrop and subsurface coals are in good reservoir and hydraulic communication. Geologic and hydrologic synergy among tectonic and structural setting, depositional systems and coal distribution, coal rank, gas content, permeability and hydrodynamics are the controls that determine the coalbed methane resource potential of the Piceance Basin. Within the coal-bearing Upper Cretaceous Williams Fork Formation, the prime coalbed methane target, reservoir heterogeneity and thrust faults cause coal beds along the Grand Hogback and in the subsurface to be in modest to poor reservoir and hydraulic communication, restricting meteoric ground water recharge and basinward flow. Total subsurface coalbed methane resources are still estimated to be approximately 99 Tcf (3.09 Tm{sup 3}), although coalbed methane resource estimates range between 80 (2.49 Tm{sup 3}) and 136 Tcf (4.24 Tm{sup 3}), depending on the calculation method used. To explore for high gas contents or fully gas-saturated coals and consequent high productivity in the Piceance Basin, improved geologic and completion technologies including exploration and development for migrated conventionally and hydrodynamically trapped gases, in-situ generated secondary biogenic gases, and solution gases will be required.

Tyler, R.; Scott, A.R.; Kaiser, W.R. [Univ. of Texas, Austin, TX (United States)

1996-06-01T23:59:59.000Z

442

Methods for applying microchannels to separate methane using liquid absorbents, especially ionic liquid absorbents from a mixture comprising methane and nitrogen  

DOE Patents [OSTI]

Methods of using microchannel separation systems including absorbents to improve thermal efficiency and reduce parasitic power loss. Energy is typically added to desorb methane and then energy or heat is removed to absorb methane using a working solution. The working solution or absorbent may comprise an ionic liquid, or other fluids that demonstrate a difference in affinity between methane and nitrogen in a solution.

Tonkovich, Anna Lee Y. (Dublin, OH); Litt, Robert D. (Westerville, OH); Dongming, Qiu (Dublin, OH); Silva, Laura J. (Plain City, OH); Lamont, Micheal Jay (Plain City, OH); Fanelli, Maddalena (Plain City, OH); Simmons, Wayne W. (Plain city, OH); Perry, Steven (Galloway, OH)

2011-10-04T23:59:59.000Z

443

Crystal Structure and Characterization of Particulate Methane Monooxygenase from Methylocystis species Strain M  

SciTech Connect (OSTI)

Particulate methane monooxygenase (pMMO) is an integral membrane metalloenzyme that oxidizes methane to methanol in methanotrophic bacteria. Previous biochemical and structural studies of pMMO have focused on preparations from Methylococcus capsulatus (Bath) and Methylosinus trichosporium OB3b. A pMMO from a third organism, Methylocystis species strain M, has been isolated and characterized. Both membrane-bound and solubilized Methylocystis sp. strain M pMMO contain {approx}2 copper ions per 100 kDa protomer and exhibit copper-dependent propylene epoxidation activity. Spectroscopic data indicate that Methylocystis sp. strain M pMMO contains a mixture of Cu{sup I} and Cu{sup II}, of which the latter exhibits two distinct type 2 Cu{sup II} electron paramagnetic resonance (EPR) signals. Extended X-ray absorption fine structure (EXAFS) data are best fit with a mixture of Cu-O/N and Cu-Cu ligand environments with a Cu-Cu interaction at 2.52-2.64 {angstrom}. The crystal structure of Methylocystis sp. strain M pMMO was determined to 2.68 {angstrom} resolution and is the best quality pMMO structure obtained to date. It provides a revised model for the pmoA and pmoC subunits and has led to an improved model of M. capsulatus (Bath) pMMO. In these new structures, the intramembrane zinc/copper binding site has a different coordination environment from that in previous models.

Smith, Stephen M.; Rawat, Swati; Telser, Joshua; Hoffman, Brian M.; Stemmler, Timothy L.; Rosenzweig, Amy C. (WSU-MED); (NWU)

2012-02-08T23:59:59.000Z

444

Correlation of flame speed with stretch in turbulent premixed methane/air flames  

SciTech Connect (OSTI)

Direct numerical simulations of two-dimensional unsteady premixed methane/air flames are performed to determine the correlation of flame speed with stretch over a wide range of curvatures and strain rates generated by intense two-dimensional turbulence. Lean and stoichiometric premixtures are considered with a detailed C{sub 1}-mechanism for methane oxidation. The computed correlation shows the existence of two distinct stable branches. It further shows that exceedingly large negative values of stretch can be obtained solely through curvature effects which give rise to an overall nonlinear correlation of the flame speed with stretch. Over a narrower stretch range, {minus}1 {le} Ka {le} 1, which includes 90% of the sample, the correlation is approximately linear, and hence, the asymptotic theory for stretch is practically applicable. Overall, one-third of the sample has negative stretch. In this linear range, the Markstein number associated with the positive branch is determined and is consistent with values obtained from comparable steady counterflow computations. In addition to this conventional positive branch, a negative branch is identified. This negative branch occurs when a flame cusp, with a center of curvature in the burnt gases, is subjected to intense compressive strain, resulting in a negative displacement speed. Negative flame speeds are also encountered for extensive tangential strain rates exceeding a Karlovitz number of unity, a value consistent with steady counterflow computations.

Chen, J.H.; Im, H.G.

1998-03-01T23:59:59.000Z

445

DEVELOPMENT OF IMPROVED CATALYSTS FOR THE SELECTIVE CATALYTIC REDUCTION OF NITROGEN OXIDES WITH HYDROCARBONS  

SciTech Connect (OSTI)

Significant work has been done by the investigators on the cerium oxide-copper oxide based sorbent/catalysts for the combined removal of sulfur and nitrogen oxides from the flue gases of stationary sources. A relatively wide temperature window was established for the use of alumina-supported cerium oxide-copper oxide mixtures as regenerable sorbents for SO{sub 2} removal. Evaluation of these sorbents as catalysts for the selective reduction of NO{sub x} gave promising results with methane. Since the replacement of ammonia by methane is commercially very attractive, in this project, it was planned to investigate the effect of promoters on the activity and selectivity of copper oxide/cerium oxide-based catalysts and to obtain data on the reaction mechanism for the SCR with methane. The investigation of the reaction mechanism will help in the selection of promoters to improve the catalytic activity and selectivity of the sorbents in the SCR with methane. This will result in new catalyst formulations. The last component of the project involves our industrial partner TDA Research, and the objective is to evaluate long- term stability and durability of the prepared sorbent/catalysts. In the second year of the project, the catalysts were investigated for their SCR activity with methane in a microreactor setup and also, by the temperature-programmed desorption (TPD) technique. The results from the SCR experiments indicated that manganese is a more effective promoter than rhodium on the supported copper oxide-ceria catalysts under study; the effectiveness of the promoter increases with the increase in Ce/Cu ratio. The TPD profiles of the unpromoted catalyst (Cu/Ce=3) is different than those promoted with 0.1% rhodium. In the current reporting period, the screening of the promoted catalysts were completed, sufficient amount of the selected catalysts were prepared and delivered to TDA for long term deactivation testing.

Dr. Ates Akyurlu; Dr. Jale F. Akyurtlu

2003-01-28T23:59:59.000Z

446

LANDFILL OPERATION FOR CARBON SEQUESTRATION AND MAXIMUM METHANE EMISSION CONTROL  

SciTech Connect (OSTI)

Controlled landfilling is an approach to manage solid waste landfills, so as to rapidly complete methane generation, while maximizing gas capture and minimizing the usual emissions of methane to the atmosphere. With controlled landfilling, methane generation is accelerated to more rapid and earlier completion to full potential by improving conditions (principally moisture, but also temperature) to optimize biological processes occurring within the landfill. Gas is contained through use of surface membrane cover. Gas is captured via porous layers, under the cover, operated at slight vacuum. A field demonstration project has been ongoing under NETL sponsorship for the past several years near Davis, CA. Results have been extremely encouraging. Two major benefits of the technology are reduction of landfill methane emissions to minuscule levels, and the recovery of greater amounts of landfill methane energy in much shorter times, more predictably, than with conventional landfill practice. With the large amount of US landfill methane generated, and greenhouse potency of methane, better landfill methane control can play a substantial role both in reduction of US greenhouse gas emissions and in US renewable energy. The work described in this report, to demonstrate and advance this technology, has used two demonstration-scale cells of size (8000 metric tons [tonnes]), sufficient to replicate many heat and compaction characteristics of larger ''full-scale'' landfills. An enhanced demonstration cell has received moisture supplementation to field capacity. This is the maximum moisture waste can hold while still limiting liquid drainage rate to minimal and safely manageable levels. The enhanced landfill module was compared to a parallel control landfill module receiving no moisture additions. Gas recovery has continued for a period of over 4 years. It is quite encouraging that the enhanced cell methane recovery has been close to 10-fold that experienced with conventional landfills. This is the highest methane recovery rate per unit waste, and thus progress toward stabilization, documented anywhere for such a large waste mass. This high recovery rate is attributed to moisture, and elevated temperature attained inexpensively during startup. Economic analyses performed under Phase I of this NETL contract indicate ''greenhouse cost effectiveness'' to be excellent. Other benefits include substantial waste volume loss (over 30%) which translates to extended landfill life. Other environmental benefits include rapidly improved quality and stabilization (lowered pollutant levels) in liquid leachate which drains from the waste.

Don Augenstein; Ramin Yazdani; Rick Moore; Michelle Byars; Jeff Kieffer; Professor Morton Barlaz; Rinav Mehta

2000-02-26T23:59:59.000Z

447

Methane generation at Grand Gulf Nuclear Station  

SciTech Connect (OSTI)

The methane generation at Grand Gulf has been brought to light twice. The initial event occurred in February 1990 and the second in December 1993. Both events involved the receipt of a cask at Barnwell Waste Management Facility that when opened indicated a gas escaping. The gas was subsequently sampled and indicated a percentage of explosive gas. Both events involved powdered resin and indicated that the generation was from a bacterial attack of the organic materials (cellulose in the powdered resin mixture). The first event occurred and was believed to be isolated in a particular waste stream. The situation was handled and a biocide was found to be effective in treatment of liners until severe cross contamination of another waste stream occurred. This allowed the shipment of a liner that was required to be sampled for explosive gases. The biocide used by GGNS was allowed reintroduction into the floor drains and this allowed the buildup of immunity of the bacterial population to this particular biocide. The approval of a new biocide has currently allowed GGNS to treat liners and ship them offsite.

Carver, M.L. [Entergy Operations, Inc., Grand Gulf Nuclear Station, Port Gibson, MS (United States)

1995-09-01T23:59:59.000Z

448

Field Exploration of Methane Seep Near Atqasuk  

SciTech Connect (OSTI)

Methane (CH{sub 4}) in natural gas is a major energy source in the U.S., and is used extensively on Alaska's North Slope, including the oilfields in Prudhoe Bay, the community of Barrow, and the National Petroleum Reserve, Alaska (NPRA). Smaller villages, however, are dependent on imported diesel fuel for both power and heating, resulting in some of the highest energy costs in the U.S. and crippling local economies. Numerous CH{sub 4} gas seeps have been observed on wetlands near Atqasuk, Alaska (in the NPRA), and initial measurements have indicated flow rates of 3,000-5,000 ft{sup 3} day{sup -1} (60-100 kg CH{sub 4} day{sup -1}). Gas samples collected in 1996 indicated biogenic origin, although more recent sampling indicated a mixture of biogenic and thermogenic gas. In this study, we (1) quantified the amount of CH{sub 4} generated by several seeps and evaluated their potential use as an unconventional gas source for the village of Atqasuk; (2) collected gas and analyzed its composition from multiple seeps several miles apart to see if the source is the same, or if gas is being generated locally from isolated biogenic sources; and (3) assessed the potential magnitude of natural CH{sub 4} gas seeps for future use in climate change modeling.

Katey Walter, Dennis Witmer, Gwen Holdmann

2008-12-31T23:59:59.000Z

449

IN-SITU SAMPLING AND CHARACTERIZATION OF NATURALLY OCCURRING MARINE METHANE HYDRATE USING THE D/V JOIDES RESOLUTION  

SciTech Connect (OSTI)

The primary activities accomplished during this quarter were continued efforts to develop plans for Phase 2 of this cooperative agreement based on the evolving operational planning for IODP Expedition 311, which will use the JOIDES Resolution to study marine methane hydrates along the Cascadia margin, offshore Vancouver Island. IODP Expedition 311 has been designed to further constrain the models for the formation of marine gas hydrate in subduction zone accretionary prisms. The objectives include characterizing the deep origin of the methane, its upward transport, its incorporation in gas hydrate, and its subsequent loss to the seafloor. The main attention of this expedition is on the widespread seafloor-parallel layer of dispersed gas hydrate located just above the base of the predicted stability field. In a gas hydrate formation model, methane is carried upward through regional sediment or small-scale fracture permeability, driven by the tectonic consolidation of the accretionary prism. The upward moving methane is incorporated into the gas hydrate clathrate as it enters the methane hydrate stability zone. Also important is the focusing of a portion of the upward methane flux into localized plumes or channels to form concentrations of near-seafloor gas hydrate. The amount of gas hydrate in local concentrations near the seafloor is especially important for understanding the response of marine gas hydrate to climate change. The expedition includes coring and downhole measurements at five sites across the Northern Cascadia accretionary prism. The sites will track the history of methane in an accretionary prism from (1) its production by mainly microbiological processes over a thick sediment vertical extent, (2) its upward transport through regional or locally focused fluid flow, (3) its incorporation in the regional hydrate layer above the BSR or in local concentrations at or near the seafloor, (4) methane loss from the hydrate by upward diffusion, and (5) methane oxidation and incorporation in seafloor carbonate, or expulsion to the ocean. This expedition builds on the previous Cascadia gas hydrate drilling of ODP Leg 146 and on more recent ODP Leg 204 off Oregon. Important experiments being considered for DOE/NETL funding as part of the JOI cooperative agreement include, (1) Logging-While-Drilling/Measurements-While-Drilling (LWD/MWD), (2) Pressure Core Sampling (PCS/HYACINTH) of gas hydrate, and fluid recovery under in situ conditions, (3) X-ray CT logging of whole cores under in situ conditions, and (4) Infrared thermal imaging of whole round cores to map temperature variations resulting from the presence of hydrate. Preliminary budget estimates have been made for each of these tasks and discussions are ongoing with DOE/NETL program managers to develop a final plan that can be implemented within the constraints of the available funding and logistical considerations.

Frank R. Rack; Tim Francis; Peter Schultheiss; Philip E. Long; Barry M. Freifeld

2005-04-01T23:59:59.000Z

450

Electrochemistry of soluble methane monooxygenase on a modified gold electrode : implications for chemical sensing in natural waters  

E-Print Network [OSTI]

This work explored the possibility of using the soluble methane monooxygenase (MMO) enzyme, a three-component enzyme which catalyzes the oxygenation of methane and other substrates, to design a methane sensor for use in ...

Chuang, Janet Duanping

2005-01-01T23:59:59.000Z

451

Methane hydrate distribution from prolonged and repeated formation in natural and compacted sand samples: X-ray CT observations  

E-Print Network [OSTI]

Deep Ocean Field Test of Methane Hydrate Formation from aW.J. , and Mason, D.H. , Methane Hydrate Formation inNatural and Laboratory--Formed Methane Gas Hydrate. American

Rees, E.V.L.

2012-01-01T23:59:59.000Z

452

Microbial distributions detected by an oligonucleotide microarray across geochemical zones associated with methane in marine sediments from the Ulleung Basin  

SciTech Connect (OSTI)

The biogeochemical processes that occur in marine sediments on continental margins are complex; however, from one perspective they can be considered with respect to three geochemical zones based on the presence and form of methane: sulfatemethane transition (SMTZ), gas hydrate stability zone (GHSZ), and free gas zone (FGZ). These geochemical zones may harbor distinct microbial communities that are important in biogeochemical carbon cycles. The objective of this study was to describe the microbial communities in sediments from the SMTZ, GHSZ, and FGZ using molecular ecology methods (i.e. PhyloChip microarray analysis and terminal restriction fragment length polymorphism (T-RFLP)) and examining the results in the context of non-biological parameters in the sediments. Non-metric multidimensional scaling and multi-response permutation procedures were used to determine whether microbial community compositions were significantly different in the three geochemical zones and to correlate samples with abiotic characteristics of the sediments. This analysis indicated that microbial communities from all three zones were distinct from one another and that variables such as sulfate concentration, hydrate saturation of the nearest gas hydrate layer, and depth (or unmeasured variables associated with depth e.g. temperature, pressure) were correlated to differences between the three zones. The archaeal anaerobic methanotrophs typically attributed to performing anaerobic oxidation of methane were not detected in the SMTZ; however, the marine benthic group-B, which is often found in SMTZ, was detected. Within the GHSZ, samples that were typically closer to layers that contained higher hydrate saturation had indicator sequences related to Vibrio-type taxa. These results suggest that the biogeographic patterns of microbial communities in marine sediments are distinct based on geochemical zones defined by methane.

Briggs, Brandon R.; Graw, Michael; Brodie, Eoin L.; Bahk, Jang-Jun; Kim, Sung-Han; Hyun, Jung-Ho; Kim, Ji-Hoon; Torres, Marta; Colwell, Frederick S.

2013-11-01T23:59:59.000Z

453

Methane Hydrate Field Program: Development of a Scientific Plan for a Methane Hydrate-Focused Marine Drilling, Logging and Coring Program  

SciTech Connect (OSTI)

This topical report represents a pathway toward better understanding of the impact of marine methane hydrates on safety and seafloor stability and future collection of data that can be used by scientists, engineers, managers and planners to study climate change and to assess the feasibility of marine methane hydrate as a potential future energy resource. Our understanding of the occurrence, distribution and characteristics of marine methane hydrates is incomplete; therefore, research must continue to expand if methane hydrates are to be used as a future energy source. Exploring basins with methane hydrates has been occurring for over 30 years, but these e?orts have been episodic in nature. To further our understanding, these e?orts must be more regular and employ new techniques to capture more data. This plan identifies incomplete areas of methane hydrate research and o?ers solutions by systematically reviewing known methane hydrate Science Challenges and linking them with Technical Challenges and potential field program locations.

Collett, Tim; Bahk, Jang-Jun; Frye, Matt; Goldberg, Dave; Husebo, Jarle; Koh, Carolyn; Malone, Mitch; Shipp, Craig; Torres, Marta; Myers, Greg; Divins, David; Morell, Margo

2013-11-30T23:59:59.000Z

454

Upgrading Methane Using Ultra-Fast Thermal Swing Adsorption  

SciTech Connect (OSTI)

The purpose of this project is to design and demonstrate an approach to upgrade low-BTU methane streams from coal mines to pipeline-quality natural gas. The objective of Phase I of the project was to assess the technical feasibility and cost of upgrading low-BTU methane streams using ultra-fast thermal swing adsorption (TSA) using Velocys modular microchannel process technology. The objective of Phase II is to demonstrate the process at the bench scale. The project is on schedule and on budget. A technical and economic feasibility assessment was completed in Task 3. The proposed Velocys technology appears feasible for the methane upgrading market. Evaluated categories include adsorbent selection, rapid-cycle valve selection, microchannel manufacturability assessment, and system design and cost. The selected adsorbent, granular microporous carbon from either Barnaby-Sutcliffe or Calgon, experimentally demonstrated sufficient methane capacity under differential temperature at 100 pounds per square inch gauge. Several valve options were identified, including candidates that can operate millions of cycles between refurbishment. The microchannel adsorber and desorber designs were made using internal Velocys manufacturability standards, and the associated costs are acceptable as included with the complete nitrogen rejection unit (NRU) cost projection. A system design and cost estimate was completed for the NRU section of the methane upgrading system. As integrated into the complete system, the cost is in line with the market requirement. The system has six main unit operations: feed compressor, dehydration unit, nitrogen rejection unit, deoxygenator, carbon dioxide scrubber, and a sales compressor. The NRU is the focus of the development program, and a bench-scale demonstration will be initiated in the next fiscal year. The Velocys NRU system targets producing methane with greater than 96% purity and at least 90% recovery for final commercial operation. A preliminary cost analysis of the methane upgrading system, including the Velocys NRU, suggests that costs below $2.00 per million (MM) BTU methane may be achieved. The cost for a conventional methane upgrading system is well above $2.30 per MM BTU, as benchmarked in an Environmental Protection Agency study.

Anna Lee Tonkovich

2004-07-01T23:59:59.000Z

455

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

SciTech Connect (OSTI)

Natural-gas hydrates have been encountered beneath the permafrost and considered a nuisance by the oil and gas industry for years. Engineers working in Russia, Canada and the USA have documented numerous drilling problems, including kicks and uncontrolled gas releases, in arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrate potential agree that the potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained on physical samples taken from actual rock containing hydrates. The work scope drilled and cored a well The Hot Ice No. 1 on Anadarko leases beginning in FY 2003 and completed in 2004. An on-site core analysis laboratory was built and utilized for determining the physical characteristics of the hydrates and surrounding rock. The well was drilled from a new Anadarko Arctic Platform that has a minimal footprint and environmental impact. The final efforts of the project are to correlate geology, geophysics, logs, and drilling and production data and provide this information to scientists developing reservoir models. No gas hydrates were encountered in this well; however, a wealth of information was generated and is contained in this report. The Hot Ice No. 1 well was drilled from the surface to a measured depth of 2300 ft. There was almost 100% core recovery from the bottom of surface casing at 107 ft to total depth. Based on the best estimate of the bottom of the methane hydrate stability zone (which used new data obtained from Hot Ice No. 1 and new analysis of data from adjacent wells), core was recovered over its complete range. Approximately 580 ft of porous, mostly frozen, sandstone and 155 of conglomerate were recovered in the Ugnu Formation and approximately 215 ft of porous sandstone were recovered in the West Sak Formation. There were gas shows in the bottom part of the Ugnu and throughout the West Sak. No hydrate-bearing zones were identified either in recovered core or on well logs. The base of the permafrost was found at about 1260 ft. With the exception of the deepest sands in the West Sak and some anomalous thin, tight zones, all sands recovered (after thawing) are unconsolidated with high porosity and high permeability. At 800 psi, Ugnu sands have an average porosity of 39.3% and geometrical mean permeability of 3.7 Darcys. Average grain density is 2.64 g/cc. West Sak sands have an average porosity of 35.5%, geometrical mean permeability of 0.3 Darcys, and average grain density of 2.70 g/cc. There were several 1-2 ft intervals of carbonate-cemented sandstone recovered from the West Sak. These intervals have porosities of only a few percent and very low permeability. On a well log they appear as resistive with a high sonic velocity. In shallow sections of other wells these usually are the only logs available. Given the presence of gas in Hot Ice No. 1, if only resistivity and sonic logs and a mud log had been available, tight sand zones may have been interpreted as containing hydrates. Although this finding does not imply that all previously mapped hydrate zones are merely tight sands, it does add a note of caution to the practice of interpreting the presence of hydrates from old well information. The methane hydrate stability zone below the Hot Ice No. 1 location includes thick sections of sandstone and conglomerate which would make excellent reservoir rocks for hydrates and below the permafrost zone shallow gas. The Ugnu formation comprises a more sand-rich section than does the West Sak formation, and the Ugnu sands when cleaned and dried are slightly more porous and significantly more permeable than the West Sak.

Richard Sigal; Kent Newsham; Thomas Williams; Barry Freifeld; Timothy Kneafsey; Carl Sondergeld; Shandra Rai; Jonathan Kwan; Stephen Kirby; Robert Kleinberg; Doug Griffin

2005-02-01T23:59:59.000Z

456

49 new T dwarfs identified using methane imaging  

E-Print Network [OSTI]

We present the discovery of 49 new photometrically classified T dwarfs from the combination of large infrared and optical surveys combined with follow-up TNG photometry. We used multi-band infrared and optical photometry from the UKIRT and Sloan Digital Sky Surveys to identify possible brown dwarf candidates, which were then confirmed using methane filter photometry. We have defined a new photometric conversion between CH4s - CH4l colour and spectral type for T4 to T8 brown dwarfs based on a part of the sample that has been followed up using methane photometry and spectroscopy. Using methane differential photometry as a proxy for spectral type for T dwarfs has proved to be a very efficient technique. Of a subset of 45 methane selected brown dwarfs that were observed spectroscopically, 100% were confirmed as T dwarfs. Future deep imaging surveys will produce large samples of faint brown dwarf candidates, for which spectroscopy will not be feasible. When broad wavelength coverage is unavailable, methane imaging...

Cardoso, C V; Smart, R L; van Spaandonk, L; Baker, D; Smith, L C; Andrei, A H; Bucciarelli, B; Dhital, S; Jones, H R A; Lattanzi, M G; Magazzu, A; Pinfield, D J; Tinney, C G

2015-01-01T23:59:59.000Z

457

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

SciTech Connect (OSTI)

Natural-gas hydrates have been encountered beneath the permafrost and considered a nuisance by the oil and gas industry for years. Engineers working in Russia, Canada and the USA have documented numerous drilling problems, including kicks and uncontrolled gas releases, in arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrate potential agree that the potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained on physical samples taken from actual rock containing hydrates. This gas-hydrate project is in the final stages of a cost shared partnership between Maurer Technology, Noble Corporation, Anadarko Petroleum, and the U.S. Department of Energy's Methane Hydrate R&D program. The purpose of the project is to build on previous and ongoing R&D in the area of onshore hydrate deposition to identify, quantify and predict production potential for hydrates located on the North Slope of Alaska. The work scope drilled and cored a well The HOT ICE No.1 on Anadarko leases beginning in FY 2003 and completed in 2004. An on-site core analysis laboratory was built and utilized for determining the physical characteristics of the hydrates and surrounding rock. The well was drilled from a new Anadarko Arctic Platform that has a minimal footprint and environmental impact. The final efforts of the project are to correlate geology, geophysics, logs, and drilling and production data and provide this information to scientists developing reservoir models. No gas hydrates were encountered in this well; however, a wealth of information was generated and is contained in this report.

Thomas E. Williams; Keith Millheim; Buddy King

2004-07-01T23:59:59.000Z

458

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

SciTech Connect (OSTI)

Natural-gas hydrates have been encountered beneath the permafrost and considered a nuisance by the oil and gas industry for years. Engineers working in Russia, Canada and the USA have documented numerous drilling problems, including kicks and uncontrolled gas releases, in arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrate potential agree that the potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained on physical samples taken from actual rock containing hydrates. This gas-hydrate project is in the final stages of a cost shared partnership between Maurer Technology, Noble Corporation, Anadarko Petroleum, and the U.S. Department of Energy's Methane Hydrate R&D program. The purpose of the project is to build on previous and ongoing R&D in the area of onshore hydrate deposition to identify, quantify and predict production potential for hydrates located on the North Slope of Alaska. The work scope drilled and cored a well The HOT ICE No.1 on Anadarko leases beginning in FY 2003 and completed in 2004. An on-site core analysis laboratory was built and utilized for determining the physical characteristics of the hydrates and surrounding rock. The well was drilled from a new Anadarko Arctic Platform that has a minimal footprint and environmental impact. The final efforts of the project are to correlate geology, geophysics, logs, and drilling and production data and provide this information to scientists developing reservoir models. No gas hydrates were encountered in this well; however, a wealth of information was generated and is contained in this report.

Thomas E. Williams; Keith Millheim; Buddy King

2004-06-01T23:59:59.000Z

459

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

SciTech Connect (OSTI)

Natural-gas hydrates have been encountered beneath the permafrost and considered a nuisance by the oil and gas industry for years. Oil-field engineers working in Russia, Canada and the USA have documented numerous drilling problems, including kicks and uncontrolled gas releases, in Arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrates agree that the potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained on physical samples taken from actual rock containing hydrates. This gas-hydrate project is a cost-shared partnership between Maurer Technology, Anadarko Petroleum, Noble Corporation, and the U.S. Department of Energy's Methane Hydrate R&D program. The purpose of the project is to build on previous and ongoing R&D in the area of onshore hydrate deposition to help identify, quantify and predict production potential for hydrates located on the North Slope of Alaska. As part of the project work scope, team members drilled and cored the HOT ICE No. 1 on Anadarko leases beginning in January 2003 and completed in March 2004. Due to scheduling constraints imposed by the Arctic drilling season, operations at the site were suspended between April 21, 2003 and January 30, 2004. An on-site core analysis laboratory was designed, constructed and used for determining physical characteristics of frozen core immediately after it was retrieved from the well. The well was drilled from a new and innovative Anadarko Arctic Platform that has a greatly reduced footprint and environmental impact. Final efforts of the project were to correlate geology, geophysics, logs, and drilling and production data and provide this information to scientists for future hydrate operations. Unfortunately, no gas hydrates were encountered in this well; however, a wealth of information was generated and is contained in the project reports.

Thomas E. Williams; Keith Millheim; Bill Liddell

2005-03-01T23:59:59.000Z

460

EMSL - oxides  

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

oxides en Influence of Adsorption Site and Wavelength on the Photodesorption of NO from the (Fe,Cr)3O4(111) Mixed Oxide Surface. http:www.emsl.pnl.govemslwebpublications...

Note: This page contains sample records for the topic "methane nitrous oxide" 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

DISSOLUTION OF NEPTUNIUM OXIDE RESIDUES  

SciTech Connect (OSTI)

This report describes the development of a dissolution flowsheet for neptunium (Np) oxide (NpO{sub 2}) residues (i.e., various NpO{sub 2} sources, HB-Line glovebox sweepings, and Savannah River National Laboratory (SRNL) thermogravimetric analysis samples). Samples of each type of materials proposed for processing were dissolved in a closed laboratory apparatus and the rate and total quantity of off-gas were measured. Samples of the off-gas were also analyzed. The quantity and type of solids remaining (when visible) were determined after post-dissolution filtration of the solution. Recommended conditions for dissolution of the NpO{sub 2} residues are: Solution Matrix and Loading: {approx}50 g Np/L (750 g Np in 15 L of dissolver solution), using 8 M nitric acid (HNO{sub 3}), 0.025 M potassium fluoride (KF) at greater than 100 C for at least 3 hours. Off-gas: Analysis of the off-gas indicated nitric oxide (NO), nitrogen dioxide (NO{sub 2}) and nitrous oxide (N{sub 2}O) as the only identified components. No hydrogen (H{sub 2}) was detected. The molar ratio of off-gas produced per mole of Np dissolved ranged from 0.25 to 0.4 moles of gas per mole of Np dissolved. A peak off-gas rate of {approx}0.1 scfm/kg bulk oxide was observed. Residual Solids: Pure NpO{sub 2} dissolved with little or no residue with the proposed flowsheet but the NpCo and both sweepings samples left visible solid residue after dissolution. For the NpCo and Part II Sweepings samples the residue amounted to {approx}1% of the initial material, but for the Part I Sweepings sample, the residue amounted to {approx}8 % of the initial material. These residues contained primarily aluminum (Al) and silicon (Si) compounds that did not completely dissolve under the flowsheet conditions. The residues from both sweepings samples contained minor amounts of plutonium (Pu) particles. Overall, the undissolved Np and Pu particles in the residues were a very small fraction of the total solids.

Kyser, E

2009-01-12T23:59:59.000Z

462

E-Print Network 3.0 - air methane vam Sample Search Results  

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

Reagents Methane (99.99 v.%, Air Products and Chemicals, Inc.) and propane (99.0 v.%, Praxair) were used... of carbon catalyst activation on the rate of methane decomposition...

463

DOE-Sponsored Beaufort Sea Expedition Studies Methane's Role in Global Climate Cycle  

Broader source: Energy.gov [DOE]

Washington, D.C. -- Increased understanding of methane's role in the global climate cycle and the potential of methane hydrate as a future energy resource could result from a recent joint research...

464

MODELING AND ANALYSIS OF CHEMILUMINESCENCE SENSING FOR SYNGAS, METHANE AND JET-A COMBUSTION  

E-Print Network [OSTI]

MODELING AND ANALYSIS OF CHEMILUMINESCENCE SENSING FOR SYNGAS, METHANE AND JET-A COMBUSTION of Technology August 2008 #12;MODELING AND ANALYSIS OF CHEMILUMINESCENCE SENSING FOR SYNGAS, METHANE AND JET

Seitzman, Jerry M.

465

Magnitude and spatio-temporal variability of methane emissions from a eutrophic freshwater lake  

E-Print Network [OSTI]

Methane is the second most important greenhouse gas after carbon dioxide, and it can significantly impact global climate change. Considerable amounts of methane can be released to the atmosphere from freshwater lakes, ...

Varadharajan, Charuleka, 1980-

2009-01-01T23:59:59.000Z

466

Department of Mechanical & Nuclear Engineering Spring 2011 Converting Methane into Ethylene  

E-Print Network [OSTI]

PENNSTATE Department of Mechanical & Nuclear Engineering Spring 2011 Converting Methane catalyst production labs, reactor testing lab, and testing equipment. Team Methane Fuzion was responsible. Temperature of the catalyst was closely monitored in order to prevent catalyst sintering. Testing

Demirel, Melik C.

467

Modeling ruminant methane emissions from the U.S. beef cattle industry  

E-Print Network [OSTI]

Computer models were constructed to estimate methane emissions from cow/calf, replacement heifers, burs, stockers and feedlot sectors of the U.S. beef cattle industry. Methane (CH4) yields were calculated based on net energy values and forage...

Turk, Danny Carroll

1993-01-01T23:59:59.000Z

468

Impact of transport model errors on the global and regional methane emissions estimated by inverse modelling  

E-Print Network [OSTI]

A modelling experiment has been conceived to assess the impact of transport model errors on methane emissions estimated in an atmospheric inversion system. Synthetic methane observations, obtained from 10 different model ...

Locatelli, R.

469

Abiotic Aerobic Methane Release from Plant Material Dan Bruhn, Per Ambus & Teis N Mikkelsen  

E-Print Network [OSTI]

Abiotic Aerobic Methane Release from Plant Material Dan Bruhn, Per Ambus & Teis N Mikkelsen)1 reported a new finding of aerobic methane (CH4) release by living plant and even dead tissue. Keppler et al

470

ANALYSIS OF ENHANCED COALBED METHANE RECOVERY THROUGH CARBON SEQUESTRATION IN THE CENTRAL  

E-Print Network [OSTI]

ANALYSIS OF ENHANCED COALBED METHANE RECOVERY THROUGH CARBON SEQUESTRATION IN THE CENTRAL recovered. Carbon sequestration, therefore, allows the utilization of unexploited mineral resources while potential of coalbed methane production using carbon dioxide sequestration in the Central Appalachian Basin

471

New mineralogy of the outer solar system and the high-pressure behaviour of methane  

E-Print Network [OSTI]

This thesis will introduce the study of methane as a mineral. Along with ammonia and water, methane is one of the main planetary-forming materials in the outer solar system. The topic of `new mineralogy of the outer solar ...

Maynard-Casely, Helen E.

2009-01-01T23:59:59.000Z

472

Author's personal copy Unified behaviour of maximum soot yields of methane, ethane and propane  

E-Print Network [OSTI]

Author's personal copy Unified behaviour of maximum soot yields of methane, ethane and propane the current study and the previous measurements in similar flames with methane, ethane, and propane flames

Gülder, ?mer L.

473

Timelines for mitigating methane emissions from energy technologies  

E-Print Network [OSTI]

Energy technologies emitting differing proportions of methane and carbon dioxide vary in their relative climate impacts over time, due to the different atmospheric lifetimes of the two gases. Standard technology comparisons using the global warming potential (GWP) emissions equivalency metric do not reveal these dynamic impacts, and may not provide the information needed to assess technologies and emissions mitigation opportunities in the context of broader climate policy goals. Here we formulate a portfolio optimization model that incorporates changes in technology impacts as a radiative forcing (RF) stabilization target is approached. An optimal portfolio, maximizing allowed energy consumption while meeting the RF target, is obtained by year-wise minimization of the marginal RF impact in an intended stabilization year. The optimal portfolio calls for using certain higher methane-emitting technologies prior to an optimal switching year, followed by methane-light technologies as the stabilization year approac...

Roy, Mandira; Trancik, Jessika E

2015-01-01T23:59:59.000Z

474

Dewatering of coalbed methane wells with hydraulic gas pump  

SciTech Connect (OSTI)

The coalbed methane industry has become an important source of natural gas production. Proper dewatering of coalbed methane (CBM) wells is the key to efficient gas production from these reservoirs. This paper presents the Hydraulic Gas Pump as a new alternative dewatering system for CBM wells. The Hydraulic Gas Pump (HGP) concept offers several operational advantages for CBM wells. Gas interference does not affect its operation. It resists solids damage by eliminating the lift mechanism and reducing the number of moving parts. The HGP has a flexible production rate and is suitable for all production phases of CBM wells. It can also be designed as a wireline retrievable system. We conclude that the Hydraulic Gas Pump is a suitable dewatering system for coalbed methane wells.

Amani, M.; Juvkam-Wold, H.C. [Texas A& M Univ., College Station, TX (United States)

1995-12-31T23:59:59.000Z

475

Integrated process for coalbed brine and methane disposal  

SciTech Connect (OSTI)

This paper describes a technology and project to demonstrate and commercialize a brine disposal process for converting the brine stream of a coalbed gas producing site into clean water for agricultural use and dry solids that can be recycled for industrial consumption. The process also utilizes coalbed methane (CBM) released from coal mining for the combustion process thereby substantially reducing the potential for methane emissions to the atmosphere. The technology is ideally suited for the treatment and disposal of produced brines generated from the development of coal mines and coalbed methane resources worldwide. Over the next 10 to 15 years, market potential for brine elimination equipment and services is estimated to be in the range of $1 billion.

Byam, J.W. Jr.; Tait, J.H.; Brandt, H.

1996-12-31T23:59:59.000Z

476

Safety at coal mines: what role does methane play?  

SciTech Connect (OSTI)

The recent Sago Mine disaster in West Virginia and other widely publicized coal mine accidents around the world have received a great deal of attention and have generated some confusion about the link between methane drainage and safety. In response, this article provides an overview of safety concerns faced by coal mines and how they do or do not relate to methane. The first section explains the variety of safety issues a coal mine must take into consideration, including methane build-up. The second section summarizes the recent coal mines accident at Sago Mine in West Virginia. The final section describes the regulatory and legislative responses in the US. 2 refs., 2 figs.

NONE

2006-04-01T23:59:59.000Z

477

Financing coal mine, methane recovery and utilization projects  

SciTech Connect (OSTI)

The article describes types and sources of funding that may be available to project developers and investors that are interested in pursuing coal mine methane (CMM) project opportunities particularly in developing countries or economies in transition. It briefly summarizes prefeasibility and feasibility studies and technology demonstrations. It provides a guide to key parties involved in project financing (equity, debt or carbon financing) as well as project risk reduction support. This article provides an update to the information contained in two previous guides - Catalogue of Coal Mine Methane Project Finance Sources (2002) and A Guide to Financing Coalbed Methane Projects (1997) - both available on the CMOP web site http://www.epa.gov/cmop/resources/reports/finance.html.

NONE

2006-07-01T23:59:59.000Z

478

Methanation of gas streams containing carbon monoxide and hydrogen  

DOE Patents [OSTI]

Carbon monoxide-containing gas streams having a relatively high concentration of hydrogen are pretreated so as to remove the hydrogen in a recoverable form for use in the second step of a cyclic, essentially two-step process for the production of methane. The thus-treated streams are then passed over a catalyst to deposit a surface layer of active surface carbon thereon essentially without the formation of inactive coke. This active carbon is reacted with said hydrogen removed from the feed gas stream to form methane. The utilization of the CO in the feed gas stream is appreciably increased, enhancing the overall process for the production of relatively pure, low-cost methane from CO-containing waste gas streams.

Frost, Albert C. (Congers, NY)

1983-01-01T23:59:59.000Z

479

Adsorption Mechanism and Uptake of Methane in Covalent Organic Frameworks: Theory and Experiment  

E-Print Network [OSTI]

this disadvantage include · storing methane as liquefied natural gas (LNG, at 112 K) or compressed natural gas (CNG

Yaghi, Omar M.

480

Detection of methane on Kuiper Belt Object (50000) Quaoar  

E-Print Network [OSTI]

The near-infrared spectrum of (50000) Quaoar obtained at the Keck Observatory shows distinct absorption features of crystalline water ice, solid methane and ethane, and possibly other higher order hydrocarbons. Quaoar is only the fifth Kuiper belt object on which volatile ices have been detected. The small amount of methane on an otherwise water ice dominated surface suggests that Quaoar is a transition object between the dominant volatile-poor small Kuiper belt objects (KBOs) and the few volatile-rich large KBOs such as Pluto and Eris.

E. L. Schaller; M. E. Brown

2007-10-18T23:59:59.000Z

Note: This page contains sample records for the topic "methane nitrous oxide" 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

Methane Hydrate R&D | 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 Office of Inspector General Office0-72.pdfGeorgeDoesn't32 Master EM ProjectMemoDepartmentFY 2010 Methane HydrateMethane

482

Compatibility of selected ceramics with steam-methane reformer environments  

SciTech Connect (OSTI)

Conventional steam reforming of methane to synthesis gas (CO and H{sub 2}) hasa conversion efficiency of about 85%. Replacement of metal tubes in the reformer with ceramic tubes offers the potential for operation at temperatures high enough to increase the efficiency to 98-99%. However, the two candidate ceramic materials being given strongest consideration, sintered alpha Si carbide and Si carbide particulate-strengthened alumina, have been shown to react with components of the reformer environment. Extent of degradation as a function of steam partial pressure and exposure time has been studied, and results suggest limits under which these structural ceramics can be used in advanced steam-methane reformers.

Keiser, J.R.; Howell, M. [Oak Ridge National Lab., TN (United States); Williams, J.J.; Rosenberg, R.A. [Stone and Webster Engineering Corp., Boston, MA (United States)

1996-04-01T23:59:59.000Z

483

Methane emission from flooded coal seams in abandoned mines, in the light of laboratory investigations  

E-Print Network [OSTI]

Methane emission from flooded coal seams in abandoned mines, in the light of laboratory of methane from flooded unexploited coal seams Field experience from the flooding operations of the abandoned sorption capacity of coal in the dry-air state through determining the isotherm of methane sorption

Boyer, Edmond

484

WATER QUALITY CHANGES AS A RESULT OF COALBED METHANE DEVELOPMENT IN A ROCKY MOUNTAIN WATERSHED1  

E-Print Network [OSTI]

WATER QUALITY CHANGES AS A RESULT OF COALBED METHANE DEVELOPMENT IN A ROCKY MOUNTAIN WATERSHED1 Xixi Wang, Assefa M. Melesse, Michael E. McClain, and Wanhong Yang2 ABSTRACT: Coalbed methane (CBM the Powder River. (KEY TERMS: coalbed methane, produced water; Montana; natural gas; pattern analysis

McClain, Michael

485

Coalbed methane producibility from the Mannville coals in Alberta, Canada: A comparison of two areas  

E-Print Network [OSTI]

Coalbed methane producibility from the Mannville coals in Alberta, Canada: A comparison of two wells drilled at Corbett Creek. Keywords: Coalbed methane; Mannville coals; Alberta; Petrology 71 TCF of methane, the Belly River Formation coals 147 TCF, and the Ardley Formation coals about 57

Paris-Sud XI, Université de

486

Regular Articles Coalbed methane produced water screening tool for treatment technology  

E-Print Network [OSTI]

Regular Articles Coalbed methane produced water screening tool for treatment technology and publicly available coalbed methane produced water screening tool to two simulated case studies to determine the largest volume waste stream in the industry (GWI, 2011). For coalbed methane (CBM) (coalbed natural gas

487

Uncorking the bottle: What triggered the Paleocene/Eocene thermal maximum methane release?  

E-Print Network [OSTI]

Uncorking the bottle: What triggered the Paleocene/Eocene thermal maximum methane release? Miriam E realms that has been attributed to a massive methane (CH4) release from marine gas hydrate reservoirs. Previously proposed mechanisms for this methane release rely on a change in deepwater source region

488

Generating Methane Gas From Manure Charles D. Fulhage, Dennis Sievers and James R. Fischer  

E-Print Network [OSTI]

Generating Methane Gas From Manure Charles D. Fulhage, Dennis Sievers and James R. Fischer Department of Agricultural Engineering At first glance, the idea of generating methane gas has considerable -- the environmental crisis and the energy shortage. Unfortunately, present-day large-scale methane generation requires

Laughlin, Robert B.

489

Source of methane and methods to control its formation in single chamber microbial electrolysis cells  

E-Print Network [OSTI]

Source of methane and methods to control its formation in single chamber microbial electrolysis online 31 March 2009 Keywords: Hydrogen Microbial electrolysis cell (MEC) Methane Single chamber Exoelectrogenic a b s t r a c t Methane production occurs during hydrogen gas generation in microbial electrolysis

490

The impact of methane thermodynamics on seasonal convection and circulation in a model Titan atmosphere  

E-Print Network [OSTI]

The impact of methane thermodynamics on seasonal convection and circulation in a model Titan mechanisms controlling the distribution of methane convection and large-scale circulation in a simplified, axisymmetric model atmosphere of Titan forced by gray radiation and moist (methane) con- vection. The large

Caballero, Rodrigo

491

Large scale characterisation of the concentAtion field of supercritical jets of hydrogen and methane  

E-Print Network [OSTI]

and methane E. Ruffin, Y. Mouilleau. J. Chaineaux INERIS - Institut National de l'Environnement Industriel et at INERIS' sought to characterise the clouds formed by supercritical jets of methane and hydrogen out were: the gas used (methane or hydrogen), the vent orifice diameter (25. 50, 75. 100 or 150 mm

Boyer, Edmond

492

Fates of methane from different lake habitats: Connecting whole-lake budgets and CH4 emissions  

E-Print Network [OSTI]

Fates of methane from different lake habitats: Connecting whole-lake budgets and CH4 emissions September 2007; revised 3 February 2008; accepted 28 February 2008; published 24 May 2008. [1] Methane (CH4 clear. We quantified internal cycling and methane emissions in three lakes during summer stratification

Pace, Michael L.

493

Evidence for Methane -Complexes in Reductive Elimination Reactions from TpRh(L)(CH3)H  

E-Print Network [OSTI]

Evidence for Methane -Complexes in Reductive Elimination Reactions from TpRh(L)(CH3)H Douglas D of methane from TpRh(L)(CH3)H in benzene/perfluorobenzene solvent mixtures is found to be dependent upon the concentration of benzene, indicating an associative component to the reductive elimination of methane. Both

Jones, William D.

494

Mid-infrared methane detection in a photonic bandgap fiber using a broadband optical  

E-Print Network [OSTI]

Mid-infrared methane detection in a photonic bandgap fiber using a broadband optical parametric of Bath, Bath, BA2 7AY, UK *Corresponding author: lwk1@hw.ac.uk Abstract: We demonstrate methane sensing with a methane:nitrogen mixture, and Fourier transform spectroscopy was used to measure transmission spectra

495

Hydrogen and methane production from swine wastewater using microbial electrolysis cells  

E-Print Network [OSTI]

Hydrogen and methane production from swine wastewater using microbial electrolysis cells Rachel C in the wastewater as hydrogen gas. Methane was also produced at a maximum of 13 ? 4% of total gas volume methane produc- tion, increasing the efficiency of converting the organic matter into current

496

On how to calculate methane lifetime from OH concentrations (FORTRAN): Integer I, J, L ! counters  

E-Print Network [OSTI]

On how to calculate methane lifetime from OH concentrations (FORTRAN): Integer I, J, L ! counters_ch4 ! methane lifetime (years) C Initialize: ch4_sum=0. yield=0. C Calculate sums: Do J = 1 , JM Do I in tropospheric ozone and methane; global 3D model studies, Atmospheric Environment, 33, 961-977, 1999

Haak, Hein

497

FILLING OF METHANE/AIR MIXTURE IN A TUBE FOR PULSE DETONATION ENGINES SHRAVANI DWARAKAPALLY  

E-Print Network [OSTI]

FILLING OF METHANE/AIR MIXTURE IN A TUBE FOR PULSE DETONATION ENGINES By SHRAVANI DWARAKAPALLY. Thanks to my god Lord Shiva for his blessings. November 18, 2011 #12;v ABSTRACT FILLING OF METHANE, was studied using the unsteady flow solver methane and air nominally at STP. Three cases were examined: (i

Texas at Arlington, University of

498

Estimation of Methane and Carbon Dioxide Surface Fluxes using a 3-D Global Atmospheric  

E-Print Network [OSTI]

Estimation of Methane and Carbon Dioxide Surface Fluxes using a 3-D Global Atmospheric Chemical@mit.edu Website: http://mit.edu/cgcs/ Printed on recycled paper #12;Estimation of Methane and Carbon Dioxide of Methane and Carbon Dioxide Surface Fluxes using a 3-D Global Atmospheric Chemical Transport Model by Yu

499

Methane emissions from lakes: Dependence of lake characteristics, two regional assessments, and a global estimate  

E-Print Network [OSTI]

Methane emissions from lakes: Dependence of lake characteristics, two regional assessments 2004. [1] Lake sediments are ``hot spots'' of methane production in the landscape. However, regional and global lake methane emissions, contributing to the greenhouse effect, are poorly known. We developed

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Cary Institute of Ecosystem Studies 1 FACTORS REGULATING NET METHANE FLUX IN  

E-Print Network [OSTI]

Cary Institute of Ecosystem Studies 1 FACTORS REGULATING NET METHANE FLUX IN URBAN FORESTS Cary Institute of Ecosystem Studies, Millbrook, NY 12545 USA Abstract. Methane is a potent greenhouse investigated four factors that could be causing this inhibition; reduced diffusion of methane into soils

Lovett, Gary M.