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

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.

4

Emissions of carbon dioxide, methane and nitrous oxide from soil receiving urban wastewater for maize (Zea mays L.) cultivation  

Science Journals Connector (OSTI)

We investigated how amending maize with wastewater at 120 kg N ha?1 affected crop growth, soil characteristics and emissions of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) compared to plants ferti...

Fabián Fernández-Luqueńo; Verónica Reyes-Varela…

2010-06-01T23:59:59.000Z

5

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

E-Print Network [OSTI]

to increases in atmospheric molecular hydrogen (H2) and reductions of fossil fuel burning emissions burning emissions have been calculated with one of the models. MAIN RESULTS Improved methane emissions (from ruminants and waste) is larger. First robust estimates of the uptake of hydrogen by

Haak, Hein

6

Sensitive detection of methane and nitrous oxide isotopomers using a continuous wave quantum cascade laser  

Science Journals Connector (OSTI)

A continuous wave quantum cascade laser (QCL), operating near 8.1 ?m...4) and nitrous oxide (N2O) stable isotopes. Several rotational transitions of 14N2 16O, 15N14N16O, 14N2 18O,

G. Gagliardi; F. Tamassia; P. De Natale…

2002-06-01T23:59:59.000Z

7

Role of Nitrous Oxide in Ambulatory Anaesthesia  

Science Journals Connector (OSTI)

As the oldest anaesthetic still in routine use, the continued role of nitrous oxide is frequently questioned. There are a few well-defined situations in which nitrous oxide is contraindicated or undesirable; i...

Sarah Billingham; Ian Smith

2014-12-01T23:59:59.000Z

8

Determinations of Carbon Dioxide and Methane by Dual Catalyst Flame Ionization Chromatography and Nitrous Oxide by Electron Capture Chromatography  

Science Journals Connector (OSTI)

......thermistor has a low thermal mass and the circuit...and have longer thermal exchange times will...detectors such as the thermal conductivity detector...equatorial Pacific Ocean during a 24 day...Department of Energy. References Journal...Methanizer" catalytic converter. 5. W.E. Wentworth......

Ray F. Weiss

1981-12-01T23:59:59.000Z

9

EIA - Greenhouse Gas Emissions - Nitrous Oxide Emissions  

Gasoline and Diesel Fuel Update (EIA)

4. Nitrous Oxide Emissions 4. Nitrous Oxide Emissions 4.1 Total emissions U.S. nitrous oxide emissions in 2009 were 4 MMTCO2e (1.7 percent) below their 2008 total (Table 22). Sources of U.S. nitrous oxide emissions include agriculture, energy use, industrial processes, and waste management (Figure 22). The largest source is agriculture (73 percent), and the majority of agricultural emissions result from nitrogen fertilization of agricultural soils (87 percent of the agriculture total) and management of animal waste (13 percent). U.S. nitrous oxide emissions rose from 1990 to 1994, fell from 1994 to 2002, and returned to an upward trajectory from 2003 to 2007, largely as a result of increased use of synthetic fertilizers. Fertilizers are the primary contributor of emissions from nitrogen fertilization of soils, which grew by more than 30 percent from

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

Nitrous Oxide Emissions from a Municipal Landfill  

Science Journals Connector (OSTI)

Nitrous Oxide Emissions from a Municipal Landfill ... Due to the small area of landfills as compared to other land-use classes, the total N2O emissions from landfills are estimated to be of minor importance for the total emissions from Finland. ...

Janne Rinne; Mari Pihlatie; Annalea Lohila; Tea Thum; Mika Aurela; Juha-Pekka Tuovinen; Tuomas Laurila; Timo Vesala

2005-09-21T23:59:59.000Z

12

Rapid thermal oxidation of silicon in mixtures of oxygen and nitrous oxide  

SciTech Connect (OSTI)

Oxidation in nitrous oxide by conventional hot wall furnace processing and by rapid thermal oxidation (RTO) has been a subject of much interest in recent years. RTO is a fundamentally different process than furnace oxidation, however, and the full effects of this type of processing on the oxidation kinetics are not well understood. Oxidation of silicon by RTO at a variety of pressures, temperatures, and oxidation gas mixtures has been studied. Although at lower temperatures (< 850 C) the atmospheric pressure oxidation rate in nitrous oxide is very close to that in oxygen, at higher temperatures the oxidation rate in nitrous oxide is much lower than that in oxygen. At lower pressures in a RTO process, the oxidation rate in nitrous oxide is higher than that in oxygen. The effect of the nitrogen incorporated in the oxide acting as a diffusion barrier has been proposed as the mechanism of temperature dependence for atmospheric pressure oxidation in nitrous oxide. This does not explain the effects seen at lower pressure,s however, The authors propose that some of the intermediate species produced in the decomposition of nitrous oxide into molecular nitrogen, molecular oxygen, and nitric oxide play a role in the initial stages of oxidation by RTO in nitrous oxide.

Grant, J.M.; Karim, Z. [Sharp Microelectronics Technology, Inc., Camas, WA (United States)

1996-12-01T23:59:59.000Z

13

Nitrous oxide emissions from wastewater treatment processes  

Science Journals Connector (OSTI)

...specific ammonia oxidation rate. Symbols represent...Research Council (ARC) for funding this...correlated to its ammonia oxidation rate. 51 Arp, D...1146/annurev.micro.61.080706.093449...1146/annurev.micro.61.080706.093449...2004 Anaerobic oxidation of inorganic nitrogen...

2012-01-01T23:59:59.000Z

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

Why Sequence a Methane-Oxidizing Archaean?  

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

a Methane-Oxidizing Archaeon? a Methane-Oxidizing Archaeon? Methane is a potent greenhouse gas whose atmospheric concentration has increased significantly because of anthropogenic activities and fluctuated naturally over glacial and interglacial cycles. While the importance of methane in Earth's climate dynamics has been well established, the global processes regulating its oceanic cycling remain poorly understood. Although there are high rates of methane production in many marine sedimentary environments (including a number that have been targeted as petroleum reserves), net methane sources from the ocean to the atmosphere appear to be small. This is due in large part to a biogeochemical process known as the anaerobic oxidation of methane (AOM). Microbially mediated AOM reduces methane flux from ocean to atmosphere, stimulates subsurface microbial

16

Methane oxidation rates in the anaerobic sediments of Saanich Inlet  

Science Journals Connector (OSTI)

water methane concentration were avail- able. ... water solute concentrations and methane oxidation rates ..... Diffusion of light paraffin hydrocarbons in water.

2000-02-09T23:59:59.000Z

17

Laboratory flammability studies of mixtures of hydrogen, nitrous oxide, and air  

SciTech Connect (OSTI)

At the request of the Department of Energy and the Westinghouse Hanford Company, the Bureau of Mines has investigated the flammability of mixtures of hydrogen, nitrous oxide, and air. This work is relevant to the possible hazards of flammable gas generation from nuclear waste tanks at Hanford, WA. The tests were performed in a 120-L spherical chamber under both quiescent and turbulent conditions using both electric spark and pyrotechnic ignition sources. The data reported here for binary mixtures of hydrogen in air generally confirm the data of previous investigators, but they are more comprehensive than those reported previously. The results clarify to a greater extent the complications associated with buoyancy, turbulence, and selective diffusion. The data reported here for ternary mixtures of hydrogen and nitrous oxide in air indicate that small additions of nitrous oxide (relative to the amount of air) have little effect, but that higher concentrations of nitrous oxide (relative to air) significantly increase the explosion hazard.

Cashdollar, K L; Hertzberg, M; Zlochower, I A; Lucci, C E; Green, G M; Thomas, R A [Bureau of Mines, Pittsburgh, PA (United States). Pittsburgh Research Center

1992-06-26T23:59:59.000Z

18

Development of a New Chemiluminescence Detector for Sub-ppm Level Nitrous Oxide  

Science Journals Connector (OSTI)

......atmosphere (15) and sea water (7), sometimes...sub-ppm level atmospheric N2O without any...through a standard gas generator (Model SGGU-72...Lodger, Jr. Atmospheric ni- trious oxide...Measurement of atmospheric nitrous oxide using...oxide in air and water using a 5A molecular......

Shun Araki; Shigetaka Suzuki; Masaaki Yamada; Hiroshi Suzuki; Toshiyuki Hobo

1978-06-01T23:59:59.000Z

19

A kinetics study of the atmospheric pressure CVD reaction of silane and nitrous oxide  

SciTech Connect (OSTI)

A mechanistic study of oxide deposition from silane and nitrous oxide between 495{sup 0}C and 690{sup 0}C was performed in a laminar flow, cool wall reactor. Results indicate the existence of two distinct chemical pathways. At high nitrous oxide concentrations, the deposition reaction is dominated by radical chain chemistry initiated by the decomposition of N/sub 2/O. At lower N/sub 2/O concentrations, the decomposition of silane to form silylene (SiH/sub 2/) initiates the deposition. Studies of the reaction of disilane and nitrous oxide confirmed the role of SiH/sub 2/ in the deposition. Reactions involving SiH/sub 2/ are used to explain the observed growth of sub-stoichiometric oxides under low N/sub 2/O conditions.

Chapple-Sokol, J.D.; Giunta, C.J.; Gordon, R.G. (Harvard Univ., Cambridge, MA (USA). Dept. of Chemistry)

1989-10-01T23:59:59.000Z

20

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

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

Modern Records of Atmospheric Nitrous Oxide (N2O) and a 2000-year Ice-core  

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

Modern Records of Atmospheric Nitrous Oxide (N2O) and a 2000-year Ice-core Modern Records of Atmospheric Nitrous Oxide (N2O) and a 2000-year Ice-core Record from Law Dome, Antarctica Introduction This page provides an introduction and links to records of atmospheric nitrous oxide (N2O) over the last 2000 years, emphasizing large data bases each representing currently active stations. Records in recent decades (time period depending on location) have been obtained from samples of ambient-air at remote locations, which represent changing global atmospheric conditions rather than influences of local sources. The longer (2000-year) record is from the Law Dome ice core in Antarctica. The ice-core record has been merged with modern annual data from Cape Grim, Tasmania to provide a 2000-year time series of annual values. A spline function has been fit to the data to provide a continuous time series of

22

Methane and nitrous oxide in the ice core record  

Science Journals Connector (OSTI)

...observed changes would lead to other feedbacks in atmospheric chemistry, which need to be included in future coupled Earth system models. The pre-industrial Holocene also shows interesting and significant changes, and a debate still exists about...

2007-01-01T23:59:59.000Z

23

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

24

Estimation of nitrous oxide emissions (GHG) from wastewater treatment plants using closed-loop mass balance and data reconciliation  

Science Journals Connector (OSTI)

The amount of greenhouse gases (GHG), especially, nitrous oxide (N2O) emitted from wastewater treatment plants (WWTP) using data reconciliation and closed-loop mass balance was estimated. This study is based on a...

JungJin Lim; Boddupalli Sankarrao; TaeSeok Oh…

2012-09-01T23:59:59.000Z

25

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

26

Nitrous Oxide as a Scavenger for Electrons in the Radiolysis of Propane  

Science Journals Connector (OSTI)

... (~400 ml.) using a cobalt-60 ˇ-ray source. The dose-rate in propane was 5 ´ 1014 eV ml,?1 min?1 (nitrous oxide dosimeter: assuming ... eV2 and using an experimentally determined value of 1.42 for the stopping power of propane relative to N2O). Total doses were 1016?1017 eV ml.?1. The results ...

G. R. A. JOHNSON; J. M. WARMAN

1964-07-04T23:59:59.000Z

27

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 Landfill, OK, provides an excellent natural laboratory for the study of anaerobicprocessesimpactinglandfill enrichment indicated that 80-90% of the original landfill methane was oxidized over the 210-m transect. First

Grossman, Ethan L.

28

Spectrum of hot methane in astronomical objects using a comprehensive computed line list  

Science Journals Connector (OSTI)

...2004 ) Standards development of global warming gas species: Methane, nitrous oxide...measurement of toxic gases produced during firefighting...Marran D ( 2001 ) Turbine engine exhaust gas measurements using...by the Science and Technology Research Council...

Sergei N. Yurchenko; Jonathan Tennyson; Jeremy Bailey; Morgan D. J. Hollis; Giovanna Tinetti

2014-01-01T23:59:59.000Z

29

Fundamental kinetics of methane oxidation in supercritical water. Summary report  

SciTech Connect (OSTI)

Fundamental understanding of the oxidation of compounds in supercritical water is essential for the design, development and operation of a supercritical water oxidation unit. Previous work in our group determined the oxidation kinetics of carbon monoxide and ethanol in supercritical water for temperatures ranging from 400 to 540 C. Oxidation studies of methane up to 700 C have recently been completed and are presented in this report. Theoretical studies of fundamental kinetics and mechanistic pathways for the oxidation of methane in supercritical water are discussed. Application of current gas phase elementary reaction models are briefly presented and their limitations discussed.

Webley, P.A.; Tester, J.W. [Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Chemical Engineering

1989-05-22T23:59:59.000Z

30

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

31

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

32

Effect of Thermal Neutron Irradiation on Oxide Catalysts for the Decomposition of Nitrous Oxide  

Science Journals Connector (OSTI)

... alpha-particles which are produced by an (n, a) reaction with lithium-6 or boron-10 atoms. Nickel oxide contains excess oxygen ions as a Ł-type semiconductor and probably ...

YASUKAZU SAITO; YUKIO YONEDA; SHOJI MAKISHIMA

1959-02-07T23:59:59.000Z

33

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 the combustion of methane on these materials. For Pd-Pt alloys, models of surface oxide structures are built. Introduction The catalytic oxidation of hydrocarbons in general, and of methane in particular, is considered

Cuniberti, Gianaurelio

34

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

35

Coupling of Catalytic Partial Oxidation and Steam Reforming of Methane to Syngas  

Science Journals Connector (OSTI)

Methane-to-syngas (i.e.CO and H2...) conversion reactions involving exothermic oxidative conversion of methane and endothermic steam reforming of methane have been carried simultaneously NiO-CaO (Ni...4/02 (1.8 –...

V. R. Choudhary; A. M. Rajput; B. Prabhakar

1995-01-01T23:59:59.000Z

36

Methane oxidation by an extremely acidophilic bacterium of the phylum Verrucomicrobia  

Science Journals Connector (OSTI)

... primarily through the microbial degradation of organic matter, but abiogenic methane emitted from seeps and geothermal areas is also a major contribution to the atmospheric budget, estimated at 45–75? ... at 45–75?Tg annually. Hell’s Gate (Tikitere), New Zealand, is a geothermal area rich in abiogenic methane. We studied methane oxidation in an area of woody ...

Peter F. Dunfield; Anton Yuryev; Pavel Senin; Angela V. Smirnova; Matthew B. Stott; Shaobin Hou; Binh Ly; Jimmy H. Saw; Zhemin Zhou; Yan Ren; Jianmei Wang; Bruce W. Mountain; Michelle A. Crowe; Tina M. Weatherby; Paul L. E. Bodelier; Werner Liesack; Lu Feng; Lei Wang; Maqsudul Alam

2007-11-14T23:59:59.000Z

37

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

38

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

39

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 hydrocarbons in surface sediment from the Coal Oil Point seep field, offshore Santa4 Barbara, California. After

Sessions, Alex L.

40

Steady-state and transient catalytic oxidation and coupling of methane  

SciTech Connect (OSTI)

This project addresses the conversion of methane from natural gas into ethane, ethylene and higher hydrocarbons. Our research explores the mechanistic and practical implications of carrying out the methane oxidative coupling reaction in reactor designs other than conventional packed-beds with co-fed reactants. These alternate reactor designs are needed to prevent the full oxidation of methane, which limits C{sub 2}, yields in methane oxidative coupling reactions. The research strategy focuses on preventing contact between the 0{sub 2} reactant required for favorable overall thermodynamics and the C{sub 2+} products of methane coupling. The behavior of various reactor designs are simulated using detailed kinetic transport models. These simulations have suggested that the best way to prevent high C0{sub 2} yields is to separate the oxygen and hydrocarbon streams altogether. As a result, the project has focused on the experimental demonstration of proton transport membrane reactors for the selective conversion of methane into higher hydrocarbons.

Iglesia, E.; Perry, D.L.; Heinemann, H.

1995-06-01T23:59:59.000Z

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

Unexpected nondenitrifier nitrous oxide reductase gene diversity and abundance in soils  

Science Journals Connector (OSTI)

...with a Dionex DX-500 ion chromatograph with an EG40 eluent (methane-sulfonic acid) generator and a CS12A column (13). 7 References...BURPS1106A_2115 YP_001066380 Burkholderia pseudomallei 1106a-HHV NC_009076 BURPS1710b_2255 YP_333650 Burkholderia pseudomallei...

Robert A. Sanford; Darlene D. Wagner; Qingzhong Wu; Joanne C. Chee-Sanford; Sara H. Thomas; Claribel Cruz-García; Gina Rodríguez; Arturo Massol-Deyá; Kishore K. Krishnani; Kirsti M. Ritalahti; Silke Nissen; Konstantinos T. Konstantinidis; Frank E. Löffler

2012-01-01T23:59:59.000Z

42

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

43

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 significant sink that regulates methane flux from sediments into the oceans and atmosphere. Here we examine mesophilic to thermophilic AOM in hydro- thermal sediments recovered from the Middle Valley vent field

Girguis, Peter R.

44

Methanation  

Science Journals Connector (OSTI)

Methanation describes the heterogeneous, gas-catalytic or biological synthesis of CH4 from H2 and CO/CO2...or in case of the biological path, alternatively from other carbon sources. It is the second substantial,...

Markus Lehner; Robert Tichler…

2014-01-01T23:59:59.000Z

45

Direct Non-oxidative Methane Conversion by Non-thermal Plasma: Experimental Study  

Science Journals Connector (OSTI)

The direct non-oxidative conversion of methane to higher hydrocarbons in non-thermal plasma, namely dielectric barrier discharge and corona discharge, has been investigated experimentally at atmospheric pressure....

Yun Yang

2003-06-01T23:59:59.000Z

46

Direct Non-oxidative Methane Conversion by Non-thermal Plasma: Modeling Study  

Science Journals Connector (OSTI)

The direct non-oxidative conversion of methane to higher hydrocarbons ... dielectric barrier discharges has been investigated theoretically at atmospheric pressure. Preliminary modeling of the results is...2...hy...

Yun Yang

2003-06-01T23:59:59.000Z

47

Landfill Methane Oxidation Across Climate Types in the U.S.  

Science Journals Connector (OSTI)

Methane oxidation in landfill covers was determined by stable isotope analyses over 37 seasonal sampling events at 20 landfills with intermediate covers over four years. Values were calculated two ways: by assuming no isotopic fractionation during gas ...

Jeffrey Chanton; Tarek Abichou; Claire Langford; Gary Hater; Roger Green; Doug Goldsmith; Nathan Swan

2010-12-06T23:59:59.000Z

48

Scaling methane oxidation: From laboratory incubation experiments to landfill cover field conditions  

SciTech Connect (OSTI)

Evaluating field-scale methane oxidation in landfill cover soils using numerical models is gaining interest in the solid waste industry as research has made it clear that methane oxidation in the field is a complex function of climatic conditions, soil type, cover design, and incoming flux of landfill gas from the waste mass. Numerical models can account for these parameters as they change with time and space under field conditions. In this study, we developed temperature, and water content correction factors for methane oxidation parameters. We also introduced a possible correction to account for the different soil structure under field conditions. These parameters were defined in laboratory incubation experiments performed on homogenized soil specimens and were used to predict the actual methane oxidation rates to be expected under field conditions. Water content and temperature corrections factors were obtained for the methane oxidation rate parameter to be used when modeling methane oxidation in the field. To predict in situ measured rates of methane with the model it was necessary to set the half saturation constant of methane and oxygen, K{sub m}, to 5%, approximately five times larger than laboratory measured values. We hypothesize that this discrepancy reflects differences in soil structure between homogenized soil conditions in the lab and actual aggregated soil structure in the field. When all of these correction factors were re-introduced into the oxidation module of our model, it was able to reproduce surface emissions (as measured by static flux chambers) and percent oxidation (as measured by stable isotope techniques) within the range measured in the field.

Abichou, Tarek, E-mail: abichou@eng.fsu.edu [Florida State University, Tallahassee, FL 32311 (United States); Mahieu, Koenraad; Chanton, Jeff [Florida State University, Tallahassee, FL 32311 (United States); Romdhane, Mehrez; Mansouri, Imane [Unite de Recherche M.A.C.S., Ecole Nationale d'Ingenieurs de Gabes, Route de Medenine, 6029 Gabes (Tunisia)

2011-05-15T23:59:59.000Z

49

Oxidation of methane by a biological dicopper centre  

Science Journals Connector (OSTI)

... Cu(I) ions and their implications. J. Am. Chem. Soc. 118, 12766–12776 (1996) Chan, S. I. et al. Redox potentiometry studies of particulate methane ...

Ramakrishnan Balasubramanian; Stephen M. Smith; Swati Rawat; Liliya A. Yatsunyk; Timothy L. Stemmler; Amy C. Rosenzweig

2010-04-21T23:59:59.000Z

50

Solubility of carbon dioxide, nitrous oxide, ethane, and nitrogen in 1-butyl-1-methylpyrrolidinium and trihexyl(tetradecyl)phosphonium tris(pentafluoroethyl)trifluorophosphate (eFAP) ionic liquids  

Science Journals Connector (OSTI)

The density and viscosity of the ionic liquids 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate [C1C4Pyrro][eFAP] and trihexyl(tetradecyl)phosphonium tris(pentafluoroethyl)trifluorophosphate [P66614][eFAP] were measured as a function of temperature and pressure and as a function of temperature, respectively. These two ionic liquids are more viscous than those based in the same anion associated to imidazolium cations. The effect of the addition of water on the density and viscosity of [P66614][eFAP] was studied at pressures close to atmospheric and as a function of the temperature. This ionic liquid is only partially miscible with water, its solubility being of around X H 2 O = 0.2 in the range of (303 to 315) K. Experimental values of the solubility of carbon dioxide, nitrous oxide, ethane, and nitrogen were obtained as a function of temperature and at pressures close to atmospheric. Carbon dioxide and nitrous oxide are the more soluble gases with mole fraction solubilities up to 7 · 10?2. Ethane is four times and 1.3 times less soluble than carbon dioxide in [C1C4Pyrro][eFAP] and [P66614][eFAP], respectively. Nitrogen is one order of magnitude less soluble than the others gases in the two ionic liquids studied. In order to understand behavior of the different gases with these ionic liquids, the thermodynamic functions of solvation such as enthalpy and entropy were calculated from the variation of the Henry’s law constant with temperature. It is shown that the more favorable interactions of the gases with the ionic liquid explain the larger solubility of carbon dioxide and nitrous oxide in [C1C4Pyrro][eFAP]. In the case of [P66614][eFAP], it is the less favorable entropic contribution that explains the lower solubility of ethane in this ionic liquid.

S. Stevanovic; M.F. Costa Gomes

2013-01-01T23:59:59.000Z

51

Promoting Effect of Pt on Self-activation over NiO–MgO Solid Solution in Oxidative Steam Reforming of Methane  

Science Journals Connector (OSTI)

The addition of Pt on NiO–MgO solid solution enhanced the performance of oxidative steam reforming of methane, especially, the catalyst can be activated during the oxidative reforming of methane at low reaction t...

Mohammad Nurunnabi; Baitao Li; Kimio Kunimori; Kimihito Suzuki…

2005-10-01T23:59:59.000Z

52

Methane-water redox reaction on A2SnO4 (A=Mg, Ca, Sr, Ba) oxide to produce C2 hydrocarbons  

Science Journals Connector (OSTI)

A2BO4...type oxides consisting of an alkali earth metal and tin showed high selectivity (>99%) and activity for the oxidative coupling of methane at 1023 K in a methane-water redox system where active oxygen spec...

K. Omata; T. Ehara; I. Kawai; M. Yamada

53

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

54

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.

55

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

56

Development of Vanadium Phosphaate Catalysts for Methanol Production by Selective Oxidation of Methane.  

SciTech Connect (OSTI)

This DOE sponsored study of methane partial oxidation was initiated at Amax Research and Development in Golden, CO in October of 1993. Shortly thereafter the management of Amax closed this R&D facility and the PI moved to the Colorado School of Mines. The project was begun again after contract transfer via a novation agreement. Experimental work began with testing of vandyl pyrophosphate (VPO), a well known alkane selective oxidation catalyst. It was found that VPO was not a selective catalyst for methane conversion yielding primarily CO. However, promotion of VPO with Fe, Cr, and other first row transition metals led to measurable yields for formaldehyde, as noted in the summary table. Catalyst characterization studies indicated that the role of promoters was to stabilize some of the vanadium in the V{sup 5+} oxidation state rather than the V{sup 4+} state formally expected for (VO){sub 2}P{sub 2}O{sub 7}.

McCormick, R.L.

1997-10-01T23:59:59.000Z

57

Determinations of Carbon Dioxide and Methane by Dual Catalyst Flame Ionization Chromatography and Nitrous Oxide by Electron Capture Chromatography  

Science Journals Connector (OSTI)

......equilibrate with atmospheric pressure through...applications involving atmospheric analyses, the instrument...electrolytically from distilled water by a General Electric...Massachusetts) hydrogen generator. The gas is further...the analysis. The water formed by the palladium...737-1-B "clean air generator," a preparative......

Ray F. Weiss

1981-12-01T23:59:59.000Z

58

Determinations of Carbon Dioxide and Methane by Dual Catalyst Flame Ionization Chromatography and Nitrous Oxide by Electron Capture Chromatography  

Science Journals Connector (OSTI)

......reduced by introducing additional fuel hydrogen before the palladium...smaller sample size is that the consumption of standards in long-term...1979 aboard the Research Vessel Wecoma during Leg 9 of the...because of its low rate of consumption of standard gases, but also......

Ray F. Weiss

1981-12-01T23:59:59.000Z

59

Effect of encapsulated calcium carbide on dinitrogen, nitrous oxide, methane, and carbon dioxide emissions from flooded rice  

Science Journals Connector (OSTI)

The efficiency of N use in flooded rice is usually low, chiefly due to gaseous losses. Emission of CH4, a gas implicated in global warming, can also be substantial in flooded rice. In a greenhouse study, the nitr...

K. F. Bronson; A. R. Mosier

1991-05-01T23:59:59.000Z

60

A novel integrated thermally double coupled configuration for methane steam reforming, methane oxidation and dehydrogenation of propane  

Science Journals Connector (OSTI)

Abstract The goal of this study is the simultaneous production of synthesis gas, hydrogen and propylene in a thermally double coupled steam reformer reactor. This reactor has three concentric tubes where the exothermic reaction of methane oxidation is supposed to occur in the middle tube and the inner and outer tubes are considered to be endothermic sides of steam reforming and propane dehydrogenation, respectively. The motivation is to combine the energy efficient concept of coupling one exothermic reaction with two endothermic reactions, enhancement of synthesis gas production, propylene and hydrogen production and also producing two different H2/CO ratio streams of syngas. A steady state homogeneous model of fixed bed for three sides predicts the performance of this new configuration. The simulation results are compared with corresponding predictions of the conventional steam reformer. The results prove that synthesis gas production is increased in a thermally double coupled reactor in comparison with conventional steam reforming. In addition, the thermally double coupled reactor reduces the capital and operating costs by reducing the reactor size and consumption of energy.

D. Karimipourfard; S. Kabiri; M.R. Rahimpour

2014-01-01T23:59:59.000Z

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

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.

62

Thermodynamic Analysis of Syngas Production via the Solar Thermochemical Cerium Oxide Redox Cycle with Methane-Driven Reduction  

Science Journals Connector (OSTI)

Thermodynamic Analysis of Syngas Production via the Solar Thermochemical Cerium Oxide Redox Cycle with Methane-Driven Reduction ... Of particular interest is the storage of solar energy in chemical bonds via the splitting of water and carbon dioxide to produce hydrogen and carbon monoxide, referred to collectively as syngas. ... The coupled cycle produces high-quality syngas by the partial oxidation of methane in the ceria reduction step in addition to the carbon monoxide and hydrogen produced by splitting carbon dioxide and water in the oxidation step. ...

Peter T. Krenzke; Jane H. Davidson

2014-05-16T23:59:59.000Z

63

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

E-Print Network [OSTI]

Comparison of C 2 Yields CHAPTER IV RESULTS OF REACTIONS ON LI-PROMOTED MGO MONOLITHS Methane/Oxygen Reactions on Li-Promoted MgO Monoliths Reactions on a 0. 3'%%d Li-Promoted MgO Monolith Temperature Profile for a Monolith Reactions on a 0. 6'/o Li...-Promoted MgO Monolith Reactions on a 1. 2% Li-promoted MgO Monolith Comparison of C Yields for Lithium-Promoted MgO Monoliths 52 53 53 56 57 59 61 61 61 62 64 64 65 CHAPTER V RESULTS Of REACTIONS ON 790 LI/MGO MONOLITHS . . 68 Methane...

Aigler, Jane Marie

2012-06-07T23:59:59.000Z

64

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

65

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

66

Hydrogen production by methane steam reforming over Ru supported on Ni–Mg–Al mixed oxides prepared via hydrotalcite route  

Science Journals Connector (OSTI)

Abstract Catalytic performance of Ru/NixMg6?xAl2 800 800 mixed oxides, with x = 2, 4 and 6, x being the molar ratio, towards Methane Steam Reforming, was studied. NixMg6?xAl2 800 oxide, used as support, was prepared via hydrotalcite route. It was thermally stabilized at 800 °C, impregnated with 0.5 wt.% ruthenium using ruthenium (III) nitrosyl nitrate Ru(NO) (NO3)3 precursor and then calcined again at 800 °C under an air flow. Ruthenium impregnation significantly enhanced the reactivity of the oxides in Methane Steam Reforming. In fact, it was found, that even with a low ruthenium content (0.5 wt.%), ruthenium oxide particles are formed but are well dispersed over the surface of the oxide NixMg6?xAl2 800. Ru/Ni6Al2 800 800 showed better catalytic performances, towards Methane Steam Reforming, than ruthenium impregnated on the two other supports. Indeed, nickel content is higher in Ni6Al2 800 than in the other studied supports and therefore the probability of Ni–Ru interaction should be greater and consequently catalytic performances could be improved.

Mira Nawfal; Cédric Gennequin; Madona Labaki; Bilal Nsouli; Antoine Aboukaďs; Edmond Abi-Aad

2014-01-01T23:59:59.000Z

67

A Mercury-Catalyzed, High-Yield System for the Oxidation of Methane to Methanol  

Science Journals Connector (OSTI)

...con-version of methane to methanol with...for commercial economics. See N. D. Parkyns...How-ever, most methane (CH4) is in locations...desirable to convert methane into liquid products...process termed steam reforming (l): CH4 + H2O-C...

Roy A. Periana; Douglas J. Taube; Eric R. Evitt; Daniel G. Löffler; Paul R. Wentrcek; George Voss; Toshihiko Masuda

1993-01-15T23:59:59.000Z

68

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

69

CO2 conversion for syngas production in methane catalytic partial oxidation  

Science Journals Connector (OSTI)

Abstract The catalytic partial oxidation of methane (CPOM) involves the interaction among methane combustion (MC), steam reforming (SR), and dry reforming (DR), and CO2 generated from MC is utilized for syngas production in DR. To evaluate the potential of CO2 utilization in CPOM for syngas production, a numerical study is carried out where CO2 is added into the feed gas and CPOM is triggered in a rhodium-based catalyst bed. Two important parameters of CO2/O2 ratio and O2/CH4 ratio (or O/C ratio) in the feed gas are taken into account. The predictions suggest that CO2 addition plays no part in MC, but it retards SR and intensifies DR. The CO2 consumption increases with CO2/O2 ratio; however, the CO2 conversion goes down. As a whole, increasing CO2 addition enhances CO formation but reduces H2 formation. The maximum syngas production is exhibited at CO2/O2 = 0.2 when the O/C ratio is 1. At a fixed CO2/O2 ratio, the maximum H2 yield and CO2 consumption are located at O/C = 1.8 and 1.0, respectively. However, the CO2 conversion monotonically decreases with increasing O/C ratio. Within the investigated range of CO2/O2 and O/C ratios, the H2 yield and CO2 conversion in CPOM are in the ranges of approximately 0.42–1.34 mol(mol CH4)?1 and 10–41%, respectively.

Wei-Hsin Chen

2014-01-01T23:59:59.000Z

70

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

71

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

E-Print Network [OSTI]

be considered both as an energy resource and as an atmospheric contaminant contributing to the greenhouse effect 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

72

Effects of anode microstructures on durability of microtubular solid oxide fuel cells during internal steam reforming of methane  

Science Journals Connector (OSTI)

Abstract When hydrocarbons are used as a fuel in solid oxide fuel cells (SOFCs), internal steam reforming increases the energy conversion efficiency and simplifies the system, including the balance-of-plant. However, conventional nickel–yttria stabilized zirconia (Ni–YSZ) anodes are prone to deterioration at high temperatures and high humidity. This paper focuses on effects in anode microstructure on performance and durability of microtubular SOFCs. The evaluations were conducted under high steam content and internal methane reforming conditions using Ni–YSZ anodes using acrylic resin and graphite pore formers. The initial cell performance was almost identical to that of \\{SOFCs\\} with anodes using acrylic resin and graphite pore formers in 40% H2–3% H2O at 700 °C. However, the anode using acrylic resin deteriorated rapidly in 40% H2–30% H2O over a period of 28 h. Furthermore, it generated almost no electric power by internal steam reforming of methane. The local oxidation of nickel particles was observed at the interface between the electrolyte and the deteriorated anodes. The anode using graphite pore former provided stable power generation in 40% H2–30% H2O, and was able to generate power in 10% CH4–30% H2O. The pore formers strongly affect fuel diffusivity in the SOFC anodes, which is an important factor in stable internal steam reforming of methane.

Hirofumi Sumi; Toshiaki Yamaguchi; Toshio Suzuki; Hiroyuki Shimada; Koichi Hamamoto; Yoshinobu Fujishiro

2014-01-01T23:59:59.000Z

73

Numerical analysis of an internal methane reforming solid oxide fuel cell with fuel recycling  

Science Journals Connector (OSTI)

The development of solid oxide fuel cell (SOFC) systems capable of direct internal reforming (DIR) of methane is being actively pursued. However, a major challenge with current state-of-the-art nickel-based anodes is their propensity to form deteriorous carbon deposits in DIR, unless excess steam is introduced in the fuel. Reduced fuel humidification levels are desirable from the viewpoints of cell performance, reliability and plant economics. This study explores the use of partial recycling of the anode exhaust as a mitigation strategy against carbon deposits at fuel steam-to-carbon ratios less than unity. Using a detailed computational fluid dynamics (CFD) model which couples momentum, heat, mass and charge transport with electrochemical and chemical reactions, the spatial extent of carbon deposition within a SOFC anode is analyzed by accounting for both the cracking and Boudouard reactions, for several fuel humidification and recycling conditions. At temperatures of approximately 1173 K and for inlet fuel molar H2O/CH4 ratios between 0.5 and 1, 50% (mass%) fuel recycling is found to be an effective strategy against carbon deposition. For lower recycling levels at the same fuel compositions, or lower fuel humidification levels (regardless of the recycling level), fuel recycling reduces the risk of coking, but does not eliminate it. The analyses presented suggest that recycling of the anodic fuel stream could help extend the operational range of DIR-SOFCs to lower fuel humidification levels than typically considered, with reduced risks of carbon deposits, while reducing system cost and complexity in terms of steam production. For dry or weakly humidified fuels, additional mitigation strategies would be required.

Valérie Eveloy

2012-01-01T23:59:59.000Z

74

A novel clean and effective syngas production system based on partial oxidation of methane assisted solid oxide co-electrolysis process  

Science Journals Connector (OSTI)

Abstract Development of the syngas production from solid oxide H2O/CO2 co-electrolysis is limited by the intensive energy input and low efficiency. Here, we present a new concept to efficiently generate syngas in both sides of the solid oxide electrolyzer by synergistically combining co-electrolysis with partial oxidation of methane (POM). Thermodynamic calculation and electrochemical measurements for the POM assisted solid oxide co-electrolysis processes on the SFM-SDC/LSGM/SFM-SDC cells exhibited an reduced electric input, increased energy conversion efficiency and decreased cathodic co-electrolysis polarization resistance in comparison with the conventional co-electrolysis. This method will be crucial to establish a clean and effective energy conversion system to meet global sustainable energy needs.

Yao Wang; Tong Liu; Shumin Fang; Guoliang Xiao; Huanting Wang; Fanglin Chen

2015-01-01T23:59:59.000Z

75

Macroscopic Biofilms in Fracture-Dominated Sediment That Anaerobically Oxidize Methane  

Science Journals Connector (OSTI)

...resistivity values caused by high gas hydrate saturation in the fractures (41...fractures partially filled with gas hydrate and feeding methane upwards toward...collected as a part of the National Gas Hydrate Program cruise 01 (NGHP01) in...

B. R. Briggs; J. W. Pohlman; M. Torres; M. Riedel; E. L. Brodie; F. S. Colwell

2011-08-05T23:59:59.000Z

76

Optimization of a compact photoacoustic quantum cascade laser spectrometer for atmospheric flux measurements: application to the detection of methane and nitrous oxide  

Science Journals Connector (OSTI)

Room temperature (RT) quantum cascade lasers (QCL) are now available even in ... in the 8 ?m range. The first laser had already been used to calibrate the...4...with a 1s integration time per point was demonstrat...

A. Grossel; V. Zéninari; B. Parvitte; L. Joly; D. Courtois

2007-08-01T23:59:59.000Z

77

Global reduced mechanisms for methane and hydrogen combustion with nitric oxide formation constructed with CSP data  

Science Journals Connector (OSTI)

Reduced mechanisms for methane-air and hydrogen-air combustion including NO formation have been constructed with the computational singular perturbation (CSP) method using the fully automated algorithm described by Massias et al. The analysis was performed on solutions of unstrained adiabatic premixed flames with detailed chemical kinetics described by GRI 2.11 for methane and a 71-reaction mechanism for hydrogen including NOx formation. A 10-step reduced mechanism for methane has been constructed which reproduces accurately laminar burning velocities, flame temperatures and mass fraction distributions of major species for the whole flammability range. Many steady-state species are also predicted satisfactorily. This mechanism is an improvement over the seven-step set of Massias et al, especially for rich flames, because the use of HCNO, HCN and C2H2 as major species results in a better calculation of prompt NO. The present 10-step mechanism may thus also be applicable to diffusion flames. A five-step mechanism for lean and hydrogen-rich combustion has also been constructed based on a detailed mechanism including thermal NO. This mechanism is accurate for a wide range of the equivalence ratio and for pressures as high as 40 bar. For both fuels, the CSP algorithm automatically pointed to the same steady-state species as those identified by laborious analysis or intuition in the literature and the global reactions were similar to well established previous methane-reduced mechanisms. This implies that the method is very well suited for the study of complex mechanisms for heavy hydrocarbon combustion.

A Massias; D Diamantis; E Mastorakos; D A Goussis

1999-01-01T23:59:59.000Z

78

Methane Main  

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

the the Methane Hydrate Advisory Committee on Methane Hydrate Issues and Opportunities Including Assessment of Uncertainty of the Impact of Methane Hydrate on Global Climate Change December 2002 Report of the Methane Hydrate Advisory Committee on Methane Hydrate Issues and Opportunities Including Assessment of Uncertainty of the Impact of Methane Hydrate on Global Climate Change December 2002 i CONTENTS What is Methane Hydrate? ............................................................................................. 1 Why Methane Hydrate Matters for the United States? ..................................................... 4 Resource Potential of Methane Hydrate .......................................................................... 5 Implications of Methane Hydrate on Safety and Seafloor Stability

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 "nitrous oxide methane" 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

Biogeochemical and Molecular Signatures of Anaerobic Methane Oxidation in a Marine Sediment  

Science Journals Connector (OSTI)

...bacteria is present in gas-hydrate-rich sediment. Laboratory...consisted of very fine sand, silt, and clay, and...we found that special gas hydrate conditions (very low...oxidation above marine gas hydrate. . S. J. Burns Carbon...

Trine R. Thomsen; Kai Finster; Niels B. Ramsing

2001-04-01T23:59:59.000Z

82

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 (â??Methane in the Arctic Shelfâ?ť 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 (â??metagenomesâ?ť). 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

83

Visualizing a Catalyst at Work during the Ignition of the Catalytic Partial Oxidation of Methane  

Science Journals Connector (OSTI)

Ignitions or light-offs of heterogeneously catalyzed oxidation reactions are a special challenge for operando studies on catalytic reactors, which have gained increasing attention for the identification of active sites of catalysts and optimal reactor design. ... One of these reactions is the catalytic partial oxidation (CPO) of hydrocarbons to carbon monoxide and hydrogen, which is considered an important alternative to presently utilized processes in natural gas and biomass conversion such as steam and autothermal reforming. ... In conclusion, we demonstrate that the ignition of heterogeneously catalyzed chemical reactions can be visualized in a spatiotemporal manner by means of synchrotron radiation based high resolution transmission X-ray absorption imaging combined with IR thermography. ...

Bertram Kimmerle; Jan-Dierk Grunwaldt; Alfons Baiker; Pieter Glatzel; Pit Boye; Sandra Stephan; Christian G. Schroer

2009-01-29T23:59:59.000Z

84

Kinetic effects of non-equilibrium plasma-assisted methane oxidation on diffusion flame extinction limits  

E-Print Network [OSTI]

. The prod- ucts of plasma assisted CH4 oxidation were measured using the Two-photon Absorption Laser to understand the role of plasma generated species on ignition, flame speed, and flame stabilization. For ignition studies, the reduction of ignition delay time by non-equilibrium nanosecond pulsed discharges

Ju, Yiguang

85

Investigation of Gas-Phase Reactions and Ignition Delay Occurring at Conditions Typical for Partial Oxidation of Methane to Synthesis Gas  

Science Journals Connector (OSTI)

Investigation of Gas-Phase Reactions and Ignition Delay Occurring at Conditions Typical for Partial Oxidation of Methane to Synthesis Gas ... A detailed kinetic model based on a free-radical mechanism has been developed, which allows the adequate calculation of the feed conversions and product selectivities. ... The production of synthesis gas from natural gas by partial oxidation has been extensively investigated as an alternative for the steam-reforming process since it results directly in a H2/CO ratio of 2:1 which is required for methanol and Fischer?Tropsch synthesis. ...

R. J. Berger; G. B. Marin

1999-06-15T23:59:59.000Z

86

Rare Branched Fatty Acids Characterize the Lipid Composition of the Intra-Aerobic Methane Oxidizer “Candidatus Methylomirabilis oxyfera”  

Science Journals Connector (OSTI)

...mitigate greenhouse gas emissions and global warming. Methane is one of the least reactive...continue to have a major impact on the global nitrogen cycle. Industrial and agricultural...methanotrophic microorganisms in Coal Oil Point seep sediments. BMC Microbiol...

Dorien M. Kool; Baoli Zhu; W. Irene C. Rijpstra; Mike S. M. Jetten; Katharina F. Ettwig; Jaap S. Sinninghe Damsté

2012-10-05T23:59:59.000Z

87

Global oceanic production of nitrous oxide  

Science Journals Connector (OSTI)

...1sigma) based on gas-exchange parametrization...upper 500 m of the water column. -The...its effect on solubility. -Our estimates...emissions based on gas-exchange parametrization...load of organic nitrogen. This fertilization...also affect the solubility of N2O. Rising...created by warming water masses after their...

2012-01-01T23:59:59.000Z

88

3, 729764, 2006 Nitrous oxide in the  

E-Print Network [OSTI]

. At the time of our cruise, water renewal had proceeded to the eastern Gotland Basin, whereas the western Gotland Basin was still unaffected by the inflow. The deep water renewal was detectable concentrations: Shallow stations in the10 Kiel Bight and Pomeranian Bight were well-ventilated with uniform N2O

Paris-Sud XI, Université de

89

Nitrous oxide emissions from wastewater treatment processes  

Science Journals Connector (OSTI)

...samples followed by GC analysis has been used in both laboratory scale reactors and full-scale plants...two laboratory scale reactors. Foley et al. [23...measurements. Combining the analyses of both the microsensor...significantly increases the reliability of data. Similar to...

2012-01-01T23:59:59.000Z

90

E-Print Network 3.0 - atmospheric methane consumption Sample...  

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

Oxidation of Methane with Air in AC Electric Gas Discharge Summary: , and specific energy consumption. Methane and oxygen conversions increased with input power but...

91

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

92

Das Methan  

Science Journals Connector (OSTI)

Bei Einwirkung von Salzsäure auf Aluminiumkarbid entwickelt sich ein farbloses Gas, welches, angezündet, mit schwach leuchtender Flamme brennt: Es ist Methan.

A. Lipp

1928-01-01T23:59:59.000Z

93

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.

94

The Future of Precipitation: Global and Regional Isidoro Orlanski  

E-Print Network [OSTI]

destruction of ozone by chlorine; (1985) Farman et al: ozone hole Carbon dioxide methane Nitrous oxide CFCs

95

The effect of SnO{sub 2} addition to Li/MgO catalysts for the oxidative coupling of methane  

SciTech Connect (OSTI)

The oxidative coupling of methane (OCM) to produce C{sub 2} hydrocarbons has been a subject of intense research during the past decade and will be especially important when the oil price shall be high. The aim of this work is to investigate the effect of SnO{sub 2} addition to Li/MgO catalysts by using several characterization methods such as XPS, IR, and XRD. Activity measurements were carried out at 923 K, where the C{sub 2} yield over Li/MgO catalyst was rather low. The effect of SnO{sub 2} addition was analyzed by XPS with respect to the surface oxygen state and by XRD with respect to the bulk phase change.

Nagaoka, Katsutoshi; Karasuda, Takashi; Aika, K. [Tokyo Inst. of Tech., Midori, Yokohama (Japan)] [Tokyo Inst. of Tech., Midori, Yokohama (Japan)

1999-01-01T23:59:59.000Z

96

Treatment of nitrous off-gas from dissolution of sludges  

SciTech Connect (OSTI)

Several configurations have been reviewed for the NO{sub x} removal of dissolver off-gas. A predesign has been performed and operating conditions have been optimized. Simple absorption columns seems to be sufficient. NHC is in charge of the treatment of sludges containing mainly uranium dioxide and metallic uranium. The process is based on the following processing steps a dissolution step to oxidize the pyrophoric materials and to dissolve radionuclides (uranium, plutonium, americium and fission products), a solid/liquid separation to get rid of the insoluble solids (to be disposed at ERDF), an adjustment of the acid liquor with neutronic poisons, and neutralization of the acid liquor with caustic soda. The dissolution step generates a flow of nitrous fumes which was evaluated in a previous study. This NO{sub x} flow has to be treated. The purpose of this report is to study the treatment process of the nitrous vapors and to 0482 perform a preliminary design. Several treatment configurations are studied and the most effective process option with respect to the authorized level of discharge into atmosphere is discussed. As a conclusion, recommendations concerning the unit preliminary design are given.

Flament, T.A.

1998-08-25T23:59:59.000Z

97

PILC-based monolithic catalysts for the selective catalytic reduction of nitrogen oxides by methane in oxygen excess  

Science Journals Connector (OSTI)

The aim of this work was the study and development of aluminum-pillared clay (Al-PILC)-based monolithic Pd catalysts for reducing \\{NOx\\} emissions from natural gas-fired power plants using methane as a selective reductant. During preparation of the support, the same raw material used to synthesize the pillared clays was used as a permanent inorganic binder. This confers high surface area and acidity to the extrudates, in addition to high hydrothermal resistance and mechanical strength. The influence of the method used for active phase incorporation on the physico-chemical properties and DeNOx activity and selectivity was studied. Conclusions were drawn from the use of different solution pH values and precursors in relation to the isoelectric point of the solid. Characterization was carried out using X-ray diffraction, inductively coupled plasma-optical emission spectroscopy, X-ray photoelectron spectroscopy, N2 adsorption, and NH3 and CO chemisorption.

F. Mohino; P. Avila; P. Salerno; A. Bahamonde; S. Mendioroz

2005-01-01T23:59:59.000Z

98

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

99

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

100

Capture and Use of Coal Mine Ventilation-Air Methane  

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

Capture and use of Coal Mine Capture and use of Coal Mine Ventilation - air Methane Background Methane emissions from coal mines represent about 10 percent of the U.S. anthropogenic methane released to the atmosphere. Methane-the second most important non-water greenhouse gas-is 21 times as powerful as carbon dioxide (CO 2 ) in its global warming potential. Ventilation-air methane (VAM)-the exhaust air from underground coal mines-is the largest source of coal mine methane, accounting for about half of the methane emitted from coal mines in the United States. Unfortunately, because of the low methane concentration (0.3-1.5 percent) in ventilation air, its beneficial use is difficult. However, oxidizing the methane to CO 2 and water reduces its global warming potential by 87 percent. A thermal

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

ARM - Methane Background Information  

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

our atmosphere's methane levels have more than doubled in the last 200 years. These methane levels contribute to the greenhouse effect, which contributes to overall climate change....

102

Fact #825: June 16, 2014 Tier 3 Non-Methane Organic Gases Plus Nitrogen Oxide Emission Standards, Model Years 2017-2025  

Broader source: Energy.gov [DOE]

The Environmental Protection Agency finalized Tier 3 emission standards in a rule issued in March 2014. One effect of the rule is a decrease in the combined amount of non-methane organic gases ...

103

Simultaneous Production of Syngas and Ethylene from Methane by Combining its Catalytic Oxidative Coupling over Mn/Na2WO4/SiO2 with Gas Phase Partial Oxidation  

Science Journals Connector (OSTI)

A new route of methane utilization is presented, in which methane is converted to H2, CO and C2H4 simultaneously with equal mole ratio, in order that the produced mixture could be used in the synthesis of propana...

Haili Zhang; Jingjing Wu; Bin Xu; Changwei Hu

2006-02-01T23:59:59.000Z

104

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

105

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

106

Methane-steam reforming  

SciTech Connect (OSTI)

A discussion covers steam reforming developments to the 1950's; the kinetics of methane-steam reforming, of the water-gas shift during methane-steam reforming, and of the carbon formation during methane-steam reforming, as approached by Akers and Camp.

Van Hook, J.P.

1980-01-01T23:59:59.000Z

107

NETL: Methane Hydrates - Methane Hydrate Reference Shelf  

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

Reference Shelf Reference Shelf The Methane Hydrate Reference Shelf was created to provide a repository for information collected from projects funded as part of the National Methane Hydrate R&D Program. As output from the projects is received, it will be reviewed and then placed onto the reference shelf to be available to other methane hydrate researchers. Projects: DOE/NETL Projects : These pages contain detailed information on methane hydrate projects funded through the National Energy Technology Laboratory. Publications: Newsletter | Bibliography | Software | Reports | Program Publications | Photo Gallery Newsletter: Fire in the Ice: A publication highlighting the National Methane Hydrate R&D Program Bibliography: "Project Reports Bibliography"[PDF]: The bibliography lists publications resulting from DOE/NETL-sponsored

108

Plasma catalytic reforming of methane  

Science Journals Connector (OSTI)

Thermal plasma technology can be efficiently used in the production of hydrogen and hydrogen-rich gases from methane and a variety of fuels. This article describes progress in plasma reforming experiments and calculations of high temperature conversion of methane using heterogeneous processes. The thermal plasma is a highly energetic state of matter that is characterized by extremely high temperatures (several thousand degrees Celsius), and a high degree of dissociation and a substantial degree of ionization. The high temperatures accelerate the reactions involved in the reforming process. Hydrogen-rich gas (40% H2, 17% CO2 and 33% N2, for partial oxidation/water shifting) can be efficiently made in compact plasma reformers. Experiments have been carried out in a small device (2–3 kW) and without the use of efficient heat regeneration. For partial oxidation/water shifting, it was determined that the specific energy consumption in the plasma reforming processes is 16 MJ/kg H2 with high conversion efficiencies. Larger plasmatrons, better reactor thermal insulation, efficient heat regeneration and improved plasma catalysis could also play a major role in specific energy consumption reduction and increasing the methane conversion. A system has been demonstrated for hydrogen production with low CO content (?1.5%) with power densities of ?30 kW (H2 HHV)/l of reactor, or ?10 m3/h H2 per liter of reactor. Power density should further increase with increased power and improved design.

L Bromberg; D.R Cohn; A Rabinovich; N Alexeev

1999-01-01T23:59:59.000Z

109

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

110

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

111

Nitrous oxide emission from denitrification in stream and river networks  

Science Journals Connector (OSTI)

...82071; e Environmental Sciences Division, Oak Ridge National Laboratory , Oak Ridge, TN 37831; f Department of Ecology and Evolutionary Biology...experiments on their lands. We also acknowledge the many workers who helped with the Lotic Intersite Nitrogen experiments...

Jake J. Beaulieu; Jennifer L. Tank; Stephen K. Hamilton; Wilfred M. Wollheim; Robert O. Hall; Jr.; Patrick J. Mulholland; Bruce J. Peterson; Linda R. Ashkenas; Lee W. Cooper; Clifford N. Dahm; Walter K. Dodds; Nancy B. Grimm; Sherri L. Johnson; William H. McDowell; Geoffrey C. Poole; H. Maurice Valett; Clay P. Arango; Melody J. Bernot; Amy J. Burgin; Chelsea L. Crenshaw; Ashley M. Helton; Laura T. Johnson; Jonathan M. O'Brien; Jody D. Potter; Richard W. Sheibley; Daniel J. Sobota; Suzanne M. Thomas

2011-01-01T23:59:59.000Z

112

Decomposition of nitrous oxide on AlFe-PILC catalyst  

Science Journals Connector (OSTI)

Two AlFe-PILC catalysts were prepared with different OH/metal...2O) decomposition reactions. The 100% conversion of N2O with NH3into N2and H2O was achieved below 500oC with both applied catalysts. However, the ac...

Ern? E. Kiss; Tatjana J Vuli?…

2005-11-01T23:59:59.000Z

113

UK emissions of the greenhouse gas nitrous oxide  

Science Journals Connector (OSTI)

...other land use, (v) waste, and (vi) other sources...forestry (LULUCF) and waste are similarly proportioned...8 per cent and manure storage systems for 6 per cent...is reported here from long-term monitoring of greenhouse...are still not enough long-term datasets to provide the...

2012-01-01T23:59:59.000Z

114

UK emissions of the greenhouse gas nitrous oxide  

Science Journals Connector (OSTI)

...ranges from 33 to 170 per cent for fuel combustion processes and 195 per cent for other combustion processes (annex 7 of MacCarthy et al. [11...manure storage and N fertilizers. Combustion processes are the main source of NO x and microbial...

2012-01-01T23:59:59.000Z

115

Ultra-rapid synthesis of syngas by the catalytic reforming of methane enhanced byin-situ heat supply through combustion  

Science Journals Connector (OSTI)

Development in highly active catalysts for the reforming of methane with CO2 and partial oxidation of methane was conducted to produce hydrogen and carbon monoxide with high reaction rates. An Ni-based four-compo...

Tomoyuki Inui; Kotaro Ichino; Isao Matsuoka…

1997-11-01T23:59:59.000Z

116

Research Highlight  

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

result except for the case in which methane and nitrous oxide were increased from zero to their 1860 concentration. The smallest differences between the AER broadband and...

117

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

118

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

119

Coalbed Methane Production  

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

NA Not Available; W Withheld to avoid disclosure of individual company data. Notes: Coalbed Methane production data collected in conjunction with proved reserves data on Form...

120

Coalbed Methane | Department of Energy  

Energy Savers [EERE]

Coalbed Methane Coalbed Methane Coalbed methane is natural gas found in coal deposits. It was once considered a nuisance and mine safety hazard, but today has become a valuable...

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

Plasma catalytic reforming of methane  

SciTech Connect (OSTI)

Thermal plasma technology can be efficiently used in the production of hydrogen and hydrogen-rich gases from methane and a variety of fuels. This paper describes progress in plasma reforming experiments and calculations of high temperature conversion of methane using heterogeneous processes. The thermal plasma is a highly energetic state of matter that is characterized by extremely high temperatures (several thousand degrees Celsius) and high degree of dissociation and substantial degree of ionization. The high temperatures accelerate the reactions involved in the reforming process. Hydrogen-rich gas (50% H{sub 2}, 17% CO and 33% N{sub 2}, for partial oxidation/water shifting) can be efficiently made in compact plasma reformers. Experiments have been carried out in a small device (2--3 kW) and without the use of efficient heat regeneration. For partial oxidation/water shifting, it was determined that the specific energy consumption in the plasma reforming processes is 16 MJ/kg H{sub 2} with high conversion efficiencies. Larger plasmatrons, better reactor thermal insulation, efficient heat regeneration and improved plasma catalysis could also play a major role in specific energy consumption reduction and increasing the methane conversion. A system has been demonstrated for hydrogen production with low CO content ({approximately} 1.5%) with power densities of {approximately} 30 kW (H{sub 2} HHV)/liter of reactor, or {approximately} 10 m{sup 3}/hr H{sub 2} per liter of reactor. Power density should further increase with increased power and improved design.

Bromberg, L.; Cohn, D.R.; Rabinovich, A. [Massachusetts Inst. of Technology, Cambridge, MA (United States). Plasma Science and Fusion Center; Alexeev, N. [Russian Academy of Sciences, Moscow (Russian Federation). Baikov Inst. of Metallurgy

1998-08-01T23:59:59.000Z

122

Coalbed methane gains viability  

SciTech Connect (OSTI)

In recent government studies, the Department of Energy (DOE) states that coal bed methane can be produced economically by using recovery systems that maximize return on investment rather than a system to produce a single coal seam just prior to mining. DOE suggests that the cost of recovering coal bed methane can be substantially reduced by increasing well spacing and employing multizone production if possible. Created as a by-product during the formation of coal, methane frequently is trapped in coal beds and associated strata. Estimates of total US methane contained in coal beds range from 260 to 860 TCF. The Pittsburgh seam in the N. Appalachia basin has estimates of 0.6 to 4 TCF alone. With current technology, DOE thinks that approximately 300 TCF of coal bed methane can be extracted from coal beds.

Not Available

1981-08-01T23:59:59.000Z

123

Methane Hydrates - Methane Hydrate Graduate Fellowship  

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

Future Supply and Emerging Resources Future Supply and Emerging Resources The National Methane Hydrates R&D Program - Graduate Fellowship Program Methane Hydrate Graduate Fellowship Program Jeffrey James Marlow, a graduate student in Geobiology at the California Institute of Technology, was recently selected as the 2012 recipient of the NETL-National Academy of Sciences (NAS) Methane Hydrate Research Fellowship. Please see page 15 of the March 2013 issue (Vol. 13, Issue 1) of Fire in the Ice for more information on the recipient. The Department of Energy has a long history of building synergistic relationships with research universities. Funding academic research is a "win-win-win" situation. The U.S. government is able to tap into some of the best minds available for solving national energy problems, the universities get the support they need to maintain cutting edge faculty and laboratories, and the students involved are provided with opportunities that help them along their chosen path of study, strengthening the national pool of scientists and engineers. According to Samuel Bodman, speaking about graduate research in methane hydrates, "Students are the foundation of our energy future, bringing new ideas and fresh perspectives to the energy industry. What better way to assure technology innovation than to encourage students working on the development of a resource that has the potential to tip our energy balance toward clean-burning, domestic fuels."

124

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

125

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-based catalysts involved decomposition of CH4 to surface carbon/coke and adsorbed hydrogen, followed

126

Methane Hydrate Program  

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

FY 2011 FY 2011 Methane Hydrate Program Report to Congress July 2012 United States Department of Energy Washington, DC 20585 Department of Energy | July 2012 FY 2011 Methane Hydrate Program Report to Congress | Page ii Message from the Secretary Section 968 of the Energy Policy Act of 2005 requires the Department of Energy to submit to Congress an annual report on the results of methane hydrate research. I am pleased to submit the enclosed report entitled U.S. Department of Energy FY 2011 Methane Hydrate Program Report to Congress. The report was prepared by the Department of Energy's Office of Fossil Energy and summarizes the progress being made in this important area of research. Pursuant to statutory requirements, this report is being provided to the following

127

Atmosphärisches Methan als Treibhausgas  

Science Journals Connector (OSTI)

Methan (CH4) gehört neben Wasser(dampf), Kohlendioxid (CO2), Distickstoffmonoxid (Lachgas, N2O), Ozon (O3) und den Fluorchlorkohlenwasserstoffen (FCKW) zu den sog.Treibhausgasen, von denen man mit großer Sicherhe...

W. Klöpffer

1990-09-01T23:59:59.000Z

128

Ionisierungsspannung von Methan  

Science Journals Connector (OSTI)

In einer näher skizzierten Versuchsanordnung wird die Ionisierungsspannung von Methan zu 14,58±0,05 Volt, die...4?Molekel erforderliche Energie zu 15,40±0,05 Volt in guter Übereinstimmung mit der für den homogene...

Erich Pietsch; Gertrud Wilcke

1927-01-01T23:59:59.000Z

129

Methane Hydrate Program  

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

Fiscal Year 2012 Fiscal Year 2012 Methane Hydrate Program Report to Congress August 2013 United States Department of Energy Washington, DC 20585 Department of Energy | August 2013 Fiscal Year 2012 Methane Hydrate Program Report to Congress | Page ii Message from the Secretary Section 968 of the Energy Policy Act of 2005 requires the Department of Energy to submit to Congress an annual report on the actions taken to carry out methane hydrate research. I am pleased to submit the enclosed report, entitled U.S. Department of Energy Fiscal Year 2012 Methane Hydrate Program Report to Congress. The report was prepared by the Department of Energy's Office of Fossil Energy and summarizes the progress being made in this important area

130

TRENDS: METHANE EMISSIONS - INTRODUCTION  

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

Of the total direct radiative forcing of long-lived greenhouse gases (2.45 Of the total direct radiative forcing of long-lived greenhouse gases (2.45 Wm-2), almost 20% is attributable to methane (CH4), according to the 1995 report of the Intergovernmental Panel on Climate Change (IPCC 1995). Since the mid-1700s, the atmospheric concentration of methane has increased by about 145% (IPCC 1995). Thus, an understanding of the various sources of methane is important. Atmospheric methane is produced both from natural sources (e.g., wetlands) and from human activities (see global methane cycle, from Professor W.S. Reeburgh at the University of California Irvine). Total sources of methane to the atmosphere for the period 1980-1990 were about 535 (range of 410-660) Tg (1 Teragram = 1 million metric tons) CH4 per year, of which 160 (110-210) Tg CH4/yr were from natural sources and 375 (300-450) Tg CH4/yr

131

Methane Hydrate | Department of Energy  

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

Methane Hydrate Methane Hydrate Methane Hydrate Types of Methane Hydrate Deposits Types of Methane Hydrate Deposits Methane hydrate is a cage-like lattice of ice inside of which are trapped molecules of methane, the chief constituent of natural gas. If methane hydrate is either warmed or depressurized, it will revert back to water and natural gas. When brought to the earth's surface, one cubic meter of gas hydrate releases 164 cubic meters of natural gas. Hydrate deposits may be several hundred meters thick and generally occur in two types of settings: under Arctic permafrost, and beneath the ocean floor. Methane that forms hydrate can be both biogenic, created by biological activity in sediments, and thermogenic, created by geological processes deeper within the earth.

132

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

133

Voluntary Reporting of Greenhouse Gases Program - Electricity Factors  

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

Voluntary Reporting Program > Coefficients Voluntary Reporting Program > Coefficients Voluntary Reporting of Greenhouse Gases Program (Voluntary Reporting of Greenhouse Gases Program Fuel Carbon Dioxide Emission Coefficients) Voluntary Reporting of Greenhouse Gases Program Fuel Emission Coefficients Table 1: Carbon Dioxide Emission Factors for Stationary Combustion Table 2: Carbon Dioxide Emission Factors for Transportation Fuels Table 3: Generic Methane and Nitrous Oxide Emission Factors for Stationary Fuel Combustion Table 4: Specific Methane and Nitrous Oxide Emission Factors for Biogenic Fuel Sources Table 5: Methane and Nitrous Oxide Emissions Factors for Highway Vehicles Table 6: Methane and Nitrous Oxide Emission Factors for Alternative Fuel Vehicles Table 7: Methane and Nitrous Oxide Emission Factors for Non-Highway Mobile Combustion

134

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

135

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

136

Direct Aromaization of Methane  

SciTech Connect (OSTI)

The thermal decomposition of methane offers significant potential as a means of producing higher unsaturated and aromatic hydrocarbons when the extent of reaction is limited. Work in the literature previous to this project had shown that cooling the product and reacting gases as the reaction proceeds would significantly reduce or eliminate the formation of solid carbon or heavier (Clo+) materials. This project studied the effect and optimization of the quenching process as a means of increasing the amount of value added products during the pyrolysis of methane. A reactor was designed to rapidly quench the free-radical combustion reaction so as to maximize the yield of aromatics. The use of free-radical generators and catalysts were studied as a means of lowering the reaction temperature. A lower reaction temperature would have the benefits of more rapid quenching as well as a more feasible commercial process due to savings realized in energy and material of construction costs. It was the goal of the project to identify promising routes from methane to higher hydrocarbons based on the pyrolysis of methane.

George Marcelin

1997-01-15T23:59:59.000Z

137

Can Algae utilize Methane?  

Science Journals Connector (OSTI)

... in connexion with oil prospecting, corrosion problems and formation of a microbial sludge in jet fuel tanks?. The scope of hydrocarbon microbiology has expanded rapidly in the meantime and currently ... the growth of photosynthetic sulphur bacteria in different gaseous environments Dr Enebo isolated the green alga Chlorella from highly reducing enrichment media in which carbonate and methane provided the carbon sources ...

Our Correspondent in Microbiology

1967-07-01T23:59:59.000Z

138

Methane from Anaerobic Fermentation  

Science Journals Connector (OSTI)

...removal rate; and recycling. Many studies have...di-gestion is utilized for wastewater stabili-zation...processes are used in some wastewater treatment plants...sludge is separated for recycling from the digester effluent...percent meth-ane. Many wastewater treatment plants in...

Donald L. Klass

1984-03-09T23:59:59.000Z

139

Methane and Coal  

Science Journals Connector (OSTI)

... stored source of the energy supplies of the world ; every twenty years the world burns a volume of coal equivalent to the volume of Snowdon (a cone of base ... hole method being most in favour. This method is being applied in about twelve British pits. The amount of methane drawn off appears to depend on the movement of the ...

ALFRED EGERTON

1952-07-19T23:59:59.000Z

140

E-Print Network 3.0 - atmospheric methane removal Sample Search...  

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

from the U-trap, remove carbon and hydrogen impurities, oxidize the purified methane to CO2 and H2... . The helium gas was recycled through the U-trap (1) to remove and purify...

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


141

Methane-to-hydrogen conversion in a reversible flow filtration combustion reactor at a high pressure  

Science Journals Connector (OSTI)

The noncatalytic process of partial oxidation of methane to syngas in a reversible flow filtration combustion reactor at high pressures has been considered. ... conversion process — the maximum temperature in the...

Yu. M. Dmitrenko; P. A. Klyovan

2013-09-01T23:59:59.000Z

142

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

143

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

144

Methane-steam reforming  

SciTech Connect (OSTI)

The literature relating to the kinetics of methane-steam reforming involving integral and differential reactor data, porous nickel catalysts and nickel foil, and data over large ranges of temperature (500 to 1700/sup 0/F), pressure (0.01 to 50 atm), and intrinsic catalyst activities (200,000-fold) was reviewed. A simple reversible first-order kinetic expression for the steam-methane reaction appears to be applicable throughout the operable region of steam-to-carbon ratios. Internal pore diffusion limitation on the conversion rate, due to catalyst size and/or intrinsic catalyst activity and total operating pressure was underlined. S-shaped Arrhenium plots (changing activation energy) are obtained when steam reforming is conducted over a temperature range sufficient to produce intrinsic kinetics (low temperature, inactive catalyst, or small catalyst size), pore diffusional limitations, and reaction on the outside surface. Homogeneous gas-phase kinetics appear to contribute only at relatively high temperature (1400/sup 0/F). In steam reforming, the water-gas shift reaction departs from its equilibrium position, especially at low methane conversion level. A general correlation of approach to water-gas shift equilibration as a function of conversion level only was indicated. (DP) 18 figures, 6 tables.

Van Hook, J.P.

1980-01-01T23:59:59.000Z

145

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

146

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

147

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

148

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

149

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

150

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

151

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

152

Areal Contrasts in the Abundance of Hydrocarbon Oxidizing Microbes in Soils  

Science Journals Connector (OSTI)

...readily demonstrated. This is in- terpreted to mean that biomethane is widely prevalent in soils. Despite the presumed greater amount of methane (that is, petromethane plus biomethane) over an oil field, the measurement of methane oxidation...

J. B. Davis; R. L. Raymond; J. P. Stanley

1959-05-01T23:59:59.000Z

153

Quantification of multiple methane emission sources at landfills using a double tracer technique  

SciTech Connect (OSTI)

Research highlights: > Precise and reliable measurements of emissions from landfills are needed. > A tracer technique involving simultaneous release of two tracers was proven successful. > Measurements to be performed at times with low changing trends in barometric pressure. - Abstract: A double tracer technique was used successfully to quantify whole-site methane (CH{sub 4}) emissions from Fakse Landfill. Emissions from different sections of the landfill were quantified by using two different tracers. A scaled-down version of the tracer technique measuring close-by to localized sources having limited areal extent was also used to quantify emissions from on-site sources at the landfill facility, including a composting area and a sewage sludge storage pit. Three field campaigns were performed. At all three field campaigns an overall leak search showed that the CH{sub 4} emissions from the old landfill section were localized to the leachate collection wells and slope areas. The average CH{sub 4} emissions from the old landfill section were quantified to be 32.6 {+-} 7.4 kg CH{sub 4} h{sup -1}, whereas the source at the new section was quantified to be 10.3 {+-} 5.3 kg CH{sub 4} h{sup -1}. The CH{sub 4} emission from the compost area was 0.5 {+-} 0.25 kg CH{sub 4} h{sup -1}, whereas the carbon dioxide (CO{sub 2}) and nitrous oxide (N{sub 2}O) flux was quantified to be in the order of 332 {+-} 166 kg CO{sub 2} h{sup -1} and 0.06 {+-} 0.03 kg N{sub 2}O h{sup -1}, respectively. The sludge pit located west of the compost material was quantified to have an emission of 2.4 {+-} 0.63 kg h{sup -1} CH{sub 4}, and 0.03 {+-} 0.01 kg h{sup -1} N{sub 2}O.

Scheutz, C., E-mail: chs@env.dtu.dk [Department of Environmental Engineering, Technical University of Denmark, Miljovej, Building 113, 2800 Kongens Lyngby (Denmark); Samuelsson, J., E-mail: jerker.samuelsson@fluxsense.se [Chalmers University of Technology/FluxSense AB, SE-412 96 Goeteborg (Sweden); Fredenslund, A.M., E-mail: amf@env.dtu.dk [Department of Environmental Engineering, Technical University of Denmark, Miljovej, Building 113, 2800 Kongens Lyngby (Denmark); Kjeldsen, P., E-mail: pk@env.dtu.dk [Department of Environmental Engineering, Technical University of Denmark, Miljovej, Building 113, 2800 Kongens Lyngby (Denmark)

2011-05-15T23:59:59.000Z

154

Federal Offshore California Coalbed Methane Proved Reserves ...  

Gasoline and Diesel Fuel Update (EIA)

12312015 Referring Pages: Coalbed Methane Proved Reserves as of Dec. 31 Federal Offshore, Pacific (California) Coalbed Methane Proved Reserves, Reserves Changes, and...

155

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...

156

Ohio Coalbed Methane Production (Billion Cubic Feet)  

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

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production Ohio Coalbed Methane Proved Reserves, Reserves...

157

Florida Coalbed Methane Production (Billion Cubic Feet)  

Gasoline and Diesel Fuel Update (EIA)

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production Florida Coalbed Methane Proved Reserves, Reserves...

158

Michigan Coalbed Methane Production (Billion Cubic Feet)  

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

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production Michigan Coalbed Methane Proved Reserves, Reserves...

159

Enhanced Renewable Methane Production System | Argonne National...  

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

Enhanced Renewable Methane Production System Technology available for licensing: Enhanced renewable methane production system provides a low-cost process that accelerates...

160

Pulsed quantum cascade laser instrument with compact design for rapid, high sensitivity measurements of trace gases in air  

Science Journals Connector (OSTI)

We have developed a compact instrument for sensitive, rapid and continuous measurement of trace gases in air, with results presented here for methane (CH4), nitric oxide (NO), nitrous oxide (N2O) and ammonia (NH3

J.B. McManus; J.H. Shorter; D.D. Nelson; M.S. Zahniser; D.E. Glenn…

2008-09-01T23:59:59.000Z

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

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

162

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

163

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

164

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

165

7.4 Landfill Methane Utilization  

Broader source: Energy.gov [DOE]

A chapter on Landfill Methane Utilization from the Clean Energy Strategies for Local Governments publication.

166

Chapter 8 - Methane Hydrates  

Science Journals Connector (OSTI)

Gas hydrate is a solid, naturally occurring substance consisting predominantly of methane gas and water. Recent scientific drilling programs in Japan, Canada, the United States, Korea and India have demonstrated that gas hydrate occurs broadly and in a variety of forms in shallow sediments of the outer continental shelves and in Arctic regions. Field, laboratory and numerical modelling studies conducted to date indicate that gas can be extracted from gas hydrates with existing production technologies, particularly for those deposits in which the gas hydrate exists as pore-filling grains at high saturation in sand-rich reservoirs. A series of regional resource assessments indicate that substantial volumes of gas hydrate likely exist in sand-rich deposits. Recent field programs in Japan, Canada and in the United States have demonstrated the technical viability of methane extraction from gas-hydrate-bearing sand reservoirs and have investigated a range of potential production scenarios. At present, basic reservoir depressurisation shows the greatest promise and can be conducted using primarily standard industry equipment and procedures. Depressurisation is expected to be the foundation of future production systems; additional processes, such as thermal stimulation, mechanical stimulation and chemical injection, will likely also be integrated as dictated by local geological and other conditions. An innovative carbon dioxide and methane swapping technology is also being studied as a method to produce gas from select gas hydrate deposits. In addition, substantial additional volumes of gas hydrate have been found in dense arrays of grain-displacing veins and nodules in fine-grained, clay-dominated sediments; however, to date, no field tests, and very limited numerical modelling, have been conducted with regard to the production potential of such accumulations. Work remains to further refine: (1) the marine resource volumes within potential accumulations that can be produced through exploratory drilling programs; (2) the tools for gas hydrate detection and characterisation from remote sensing data; (3) the details of gas hydrate reservoir production behaviour through additional, well-monitored and longer duration field tests and (4) the understanding of the potential environmental impacts of gas hydrate resource development. The results of future production tests, in the context of varying market and energy supply conditions around the globe, will be the key to determine the ultimate timing and scale of the commercial production of natural gas from gas hydrates.

Ray Boswell; Koji Yamamoto; Sung-Rock Lee; Timothy Collett; Pushpendra Kumar; Scott Dallimore

2014-01-01T23:59:59.000Z

167

Applicability of Anaerobic Nitrate-Dependent Fe(II) Oxidation to Microbial Enhanced Oil Recovery (MEOR)  

Science Journals Connector (OSTI)

Furthermore, both of the substrates of the NDFO organisms [Fe(II) and nitrate] and the various end products of the metabolism [Fe(III), nitrite, nitric oxide, and nitrous oxide] all have known anti-souring and sulfide-scouring activities. ... A glass wool pad was placed on the bottom of the bead beds to prevent beads from falling into the inlet tubing. ...

Hongbo Zhu; Han K. Carlson; John D. Coates

2013-06-25T23:59:59.000Z

168

Effects of oxygen concentration on radiative loss from normal-gravity and microgravity methane diffusion flames  

SciTech Connect (OSTI)

Laminar diffusion flames of methane, burning in quiescent oxidizing environments at atmospheric pressure, have been studied under both normal-gravity and microgravity conditions. Radiation from these flames is measured using a wide-view-angle, thermopile detector radiometer. The oxidizer was 18, 21, and 30 percent oxygen in nitrogen. 17 refs.

Bahadori, M.Y.; Edelman, R.B.; Stocker, D.P.; Sotos, R.G.; Vaughan, D.F. (Science Applications International Corp., Torrance, CA (United States) Rockwell International Corp., Rocketdyne Div., Canoga Park, CA (United States) NASA, Lewis Research Center, Cleveland, OH (United States))

1992-01-01T23:59:59.000Z

169

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

170

Direct catalytic conversion of methane and light hydrocarbon gases. Final report, October 1, 1986--July 31, 1989  

SciTech Connect (OSTI)

This project explored conversion of methane to useful products by two techniques that do not involve oxidative coupling. The first approach was direct catalytic dehydrocoupling of methane to give hydrocarbons and hydrogen. The second approach was oxidation of methane to methanol by using heterogenized versions of catalysts that were developed as homogeneous models of cytochrome-P450, an enzyme that actively hydroxylates hydrocarbons by using molecular oxygen. Two possibilities exist for dehydrocoupling of methane to higher hydrocarbons: The first, oxidative coupling to ethane/ethylene and water, is the subject of intense current interest. Nonoxidative coupling to higher hydrocarbons and hydrogen is endothermic, but in the absence of coke formation the theoretical thermodynamic equilibrium yield of hydrocarbons varies from 25% at 827{degrees}C to 65% at 1100{degrees}C (at atmospheric pressure). In this project we synthesized novel, highly dispersed metal catalysts by attaching metal clusters to inorganic supports. The second approach mimics microbial metabolism of methane to produce methanol. The methane mono-oxygenase enzyme responsible for the oxidation of methane to methanol in biological systems has exceptional selectivity and very good rates. Enzyme mimics are systems that function as the enzymes do but overcome the problems of slow rates and poor stability. Most of that effort has focused on mimics of cytochrome P-450, which is a very active selective oxidation enzyme and has a metalloporphyrin at the active site. The interest in nonporphyrin mimics coincides with the interest in methane mono-oxygenase, whose active site has been identified as a {mu}-oxo dinuclear iron complex.We employed mimics of cytochrome P-450, heterogenized to provide additional stability. The oxidation of methane with molecular oxygen was investigated in a fixed-bed, down-flow reactor with various anchored metal phthalocyanines (PC) and porphyrins (TPP) as the catalysts.

Wilson, R.B. Jr.; Posin, B.M.; Chan, Yee-Wai

1995-06-01T23:59:59.000Z

171

Texas--State Offshore Coalbed Methane Production (Billion Cubic...  

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

Date: 12312015 Referring Pages: Coalbed Methane Estimated Production Texas State Offshore Coalbed Methane Proved Reserves, Reserves Changes, and Production Coalbed Methane...

172

Louisiana--State Offshore Coalbed Methane Production (Billion...  

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

Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production LA, State Offshore Coalbed Methane Proved Reserves, Reserves Changes, and Production Coalbed Methane...

173

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

174

Methane Credit | Open Energy Information  

Open Energy Info (EERE)

Methane Credit Methane Credit Jump to: navigation, search Name Methane Credit Place Charlotte, North Carolina Zip 28273 Product Specialises in utilising methane produced on municipal landfill sites. Coordinates 35.2225°, -80.837539° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.2225,"lon":-80.837539,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

175

NETL: Methane Hydrates - Hydrate Newsletter  

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

Methane Hydrate R&D Program Newsletter Methane Hydrate R&D Program Newsletter An image of a hydrate burning overlayed with the Newsletter Title: Fire in the Ice The methane hydrate newsletter, Fire in the Ice, is a bi-annual publication highlighting the latest developments in international gas hydrates R&D. Fire in the Ice promotes the exchange of information amoung those involved in gas hydrates research and development, and also recognizes the efforts of a hydrate researcher in each issue. The newsletter now reaches nearly 1300 scientists and other interested individuals in sixteen countries. To subscribe electronically to Fire in the Ice please send an email to karl.lang@contr.netl.doe.gov Please click on the links below to access issues of "Fire in the Ice". More on Methane Hydrates

176

Der atmosphärische Kreislauf von Methan  

Science Journals Connector (OSTI)

Present methane concentrations in the northern troposphere average 1.65 ppm. Most CH4 is of recent biogenic origin. 14C analyses indicate that no more than 10% is released by fossil sources. The various CH4-produ...

D. H. Ehhalt

1979-06-01T23:59:59.000Z

177

ISSUE PAPER METHANE AVOIDANCE FROM  

E-Print Network [OSTI]

.........................................................................................1 1.2. GHG Emissions from Organic Waste...........................................................................................................39 6.2. Standard Methods for Quantifying Methane from Organic Waste in Landfills...40 6.3. GHG.2. Compost GHG Potential

Brown, Sally

178

Emission of methane from plants  

Science Journals Connector (OSTI)

...basis for the efforts to ameliorate fluxes of this potent greenhouse gas, which may contribute significantly to global warming...was emitting significant quantities of methane under ambient lighting in laboratory-controlled conditions. We also examined other...

2009-01-01T23:59:59.000Z

179

NETL: Methane Hydrates - DOE/NETL Projects  

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

Gas Hydrate Research in Deep Sea Sediments - New Zealand Task Gas Hydrate Research in Deep Sea Sediments - New Zealand Task DE-AI26-06NT42878 Goal The objective of this research is to determine the extent and dynamics of gas hydrate deposits and their relation to areas of focused fluid flux at and beneath the seafloor. Specific objectives include: a). Refine geophysical, geochemical and microbiological technologies for prospecting hydrate distribution and content; b). Contribute to establishing high-priority geographical regions of prospective interest, in terms of methane volume estimates; c). Prediction of environmental effects and geologic risks at the continental margin associated to the natural resource occurrence and resource exploitation; and d). Expand understanding of the biogeochemical parameters and associated microbial community diversity in shallow sediments that influence the porewater sulfate gradient observed through anaerobic oxidation of methane. To accomplish these objectives, the Naval Research Laboratory (NRL) collaborated with New ZealandÂ’s Institute of Geological and Nuclear Sciences (GNS) in a research cruise off the coast of New Zealand. NRL has conducted similar research cruises off the west coast and east coast of the United States, in the Gulf of Mexico and off the coast of Chile.

180

Coalbed Methane Proved Reserves  

Gasoline and Diesel Fuel Update (EIA)

Coalbed Methane Proved Reserves (Billion Cubic Feet) Period: Annual Download Series History Download Series History Definitions, Sources & Notes Definitions, Sources & Notes 2003 2004 2005 2006 2007 2008 View History U.S. 18,743 18,390 19,892 19,620 21,874 20,798 1989-2008 Alabama 1,665 1,900 1,773 2,068 2,126 1,727 1989-2008 Alaska 0 0 2007-2008 Arkansas 31 31 2007-2008 California 0 0 2007-2008 Colorado 6,473 5,787 6,772 6,344 7,869 8,238 1989-2008 Florida 0 0 2007-2008 Kansas 340 301 2007-2008 Kentucky 0 0 2007-2008 Louisiana 7 9 2007-2008 North 7 9 2007-2008 South Onshore 0 0 2007-2008 South Offshore 0 0 2007-2008 Michigan 0 0 2007-2008 Mississippi 0 0 2007-2008 Montana 66 75 2007-2008 New Mexico 4,396 5,166 5,249 4,894 4,169 3,991 1989-2008

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

Performance tests for steam methane reformers  

SciTech Connect (OSTI)

Most of the synthesis gas plants in operation in the United States for production of hydrogen, carbon monoxide, methanol, and ammonia use steam methane reforming (SMR). Economic projections indicate that the SMR plant may continue to be the most favorable process choice through the 1980s or until partial oxidation or coal gasification processes are technically proven. The complexity of an efficiently designed SMR plant for production of these chemicals requires a thorough understanding of many unit operations to correctly evaluate the performance of an operating plant. Air Products and Chemicals, Inc. (APCI) owns and operates various types of SMR plants for production of hydrogen and carbon monoxide gases for pipe line sales, liquid hydrogen for merchant sale, methanol and ammonia. Over the past few years, APCI has developed guidelines and procedures for plant performance tests done at its major SMR plants. This article documents the plant test procedure used in conducting onsite SMR plant performance tests.

Wang, S.I.; DiMartino, S.P.; Patel, N.M.; Smith, D.D.

1982-08-01T23:59:59.000Z

182

Microsecond Catalytic Partial Oxidation of Alkanes  

Science Journals Connector (OSTI)

...HICKMAN A. D. , PRODUCTION OF SYNGAS BY DIRECT CATALYTIC-OXIDATION OF METHANE...PFEFFERLE D. L. , CATALYSIS IN COMBUSTION , CATALYSIS...a-alu-mina monoliths coated with Rh (for syngas) (1, 2) or with Pt (for olefins...

Duane A. Goetsch; Lanny D. Schmidt

1996-03-15T23:59:59.000Z

183

NETL: Methane Hydrates - Global Assessment of Methane Gas Hydrates  

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

Global Assessment of Methane Gas Hydrates Last Reviewed 12/18/2013 Global Assessment of Methane Gas Hydrates Last Reviewed 12/18/2013 DE-FE0003060 Goal The goal of this project is to develop a global assessment of methane gas hydrates that will facilitate informed decision-making regarding the potential development of gas hydrate resources between the scientific community and other stakeholders/decision makers. The Assessment will provide science-based information on the role of gas hydrates in natural climate change and the carbon cycle, their sensitivity to climate change, and the potential environmental and socio-economic impacts of hydrate production. Performers Stiftelsen GRID-Arendal, Arendal, Norway Funding Institutions United Nations Environment Programme (UNEP) Statoil Schlumberger United States Department of Energy (USDOE)

184

ORIGINAL ARTICLE Sulfur oxidizers dominate carbon fixation  

E-Print Network [OSTI]

). Methylotrophs and iron oxidizers were also active in plume waters and expressed key proteins for methane by bacteria (especially, alpha-, gamma- and epsilon-proteobacteria) that likely participate in the oxidationORIGINAL ARTICLE Sulfur oxidizers dominate carbon fixation at a biogeochemical hot spot in the dark

Hansell, Dennis

185

Chapter 18 - Worldwide Coal Mine Methane and Coalbed Methane Activities  

Science Journals Connector (OSTI)

Abstract The chapter provides an overview of coal bed methane production in all countries (except USA; covered in Chapter 17) around the world where there is a viable coal deposit. Coal deposits are shown in a map and coal bed methane reserves are estimated. All countries can follow the lead provided by USA in CBM production where 10% of total gas consumption (2 TCF/year) comes from coal seams. Exploitation of thick and deep coal seams using the latest technology can create a vast source of domestic energy for many countries around the world.

Charlee Boger; James S. Marshall; Raymond C. Pilcher

2014-01-01T23:59:59.000Z

186

Molecular Analysis of the Diversity of Sulfate-Reducing and Sulfur-Oxidizing Prokaryotes in the Environment, Using aprA as Functional Marker Gene  

Science Journals Connector (OSTI)

...distribution and diversity of microbes in methane hydrate-bearing deep marine sediments on the Pacific Ocean...Joergensen. 2003. Anaerobic oxidation of methane above gas hydrates at Hydrate Ridge, NE Pacific Ocean. Mar. Ecol. Prog. Ser...

Birte Meyer; Jan Kuever

2007-10-05T23:59:59.000Z

187

NETL: Methane Hydrates - DOE/NETL Projects  

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

Assessing the Efficacy of the Aerobic Methanotropic Biofilter in Methane Hydrate Environments Last Reviewed 1/8/2013 Assessing the Efficacy of the Aerobic Methanotropic Biofilter in Methane Hydrate Environments Last Reviewed 1/8/2013 DE-NT0005667 Goal The goal of this project is to assess the efficacy of aerobic methanotrophy in preventing the escape of methane from marine, hydrate-bearing reservoirs to the atmosphere and ultimately to better define the role of aerobic methanotrophy in the global carbon cycle. Graph overlayed on photo - Methane seeps with the resulting methane plume Methane seeps with the resulting methane plume, Geophysical Research Letters, November 2007 Performers University of California – Santa Barbara, Santa Barbara (UCSB), CA 93106 Background The global methane reservoir in the form of gas hydrate is estimated at 500–10,000 Gt (KVENVOLDEN, 1995; MILKOV, 2004). This pool of carbon

188

Miscellaneous States Coalbed Methane Proved Reserves (Billion...  

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

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

189

Carbon Dioxide and Methane Emissions from Estuaries  

Science Journals Connector (OSTI)

Carbon dioxide and methane emissions from estuaries are reviewed in relation with biogeochemical processes and carbon cycling. In estuaries, carbon dioxide and methane emissions show a large spatial and temporal ...

Gwenaël Abril; Alberto Vieira Borges

2005-01-01T23:59:59.000Z

190

Optical constants of liquid and solid methane  

Science Journals Connector (OSTI)

The optical constants nr + ini of liquid methane and phase I solid methane were determined over the entire spectral range by the use of various data sources published in the...

Martonchik, John V; Orton, Glenn S

1994-01-01T23:59:59.000Z

191

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

192

Preliminary GHG Emissions Inventory for the Slovak Republic  

Science Journals Connector (OSTI)

This paper presents preliminary results of a greenhouse gas emissions inventory for the Slovak Republic. The key gases included are carbon dioxide, methane, and nitrous oxide. Chlorofluorocarbons are excluded ...

Katarína Mare?kova; Pavol Bielek; Stanislav Kucirek…

1996-01-01T23:59:59.000Z

193

GHG Emissions from Boreal Reservoirs and Natural Aquatic Ecosystems  

Science Journals Connector (OSTI)

Carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) gross fluxes were measured at the air-water interface of 205 aquatic ecosystems in the Canadian boreal region from 1993 to 2003. Fluxes were obtained wi...

Alain Tremblay; Jean Therrien; Bill Hamlin…

2005-01-01T23:59:59.000Z

194

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

195

coalbed methane | OpenEI  

Open Energy Info (EERE)

coalbed methane coalbed methane Dataset Summary Description (Abstract): Each TMY is a data set of hourly values of solar radiation and meteorological elements for a 1-year period. Solar radiation is modeled using the NREL METSTAT model, with surface observed cloud cover being the principal model input. The container file contains one TMY file for each selected station in the region, plus documentation files and a TMY data reader file for use with Microsoft Excel. (Purpose): Simulations Source NREL Date Released April 30th, 2005 (9 years ago) Date Updated November 07th, 2007 (7 years ago) Keywords coalbed methane GEF Kenya NREL SWERA TMY UNEP Data application/zip icon Download Data (zip, 5.4 MiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage

196

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

197

Electron Transport in Methane Gas  

Science Journals Connector (OSTI)

We propose a kinetic theory for electron-drift-velocity maxima in polyatomic gases. The case of methane is considered in detail, and good agreement with experiment is obtained with use of model cross sections. The Boltzmann equation is solved directly by applying an iterative numerical technique, which converges well when inelastic scattering effects are important.

Peter Kleban and H. Ted Davis

1977-08-22T23:59:59.000Z

198

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

199

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

200

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

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

Methane Hydrate Advisory Committee | Department of Energy  

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

Methane Hydrate Advisory Methane Hydrate Advisory Committee Methane Hydrate Advisory Committee The Methane Hydrate Advisory Committee was created in response to provisions of the Methane Hydrate Research and Development Act of 2000 and reauthorized by the Energy Policy Act of 2005. The Committee is to advise the Secretary of Energy on potential applications of methane hydrate; assist in developing recommendations and priorities for the methane hydrate research and development program; and submit to Congress one or more reports on an assessment of the research program and an assessment of the DOE 5-year research plan. The Committee's charter stipulates that up to 15 members can be appointed by the Secretary of Energy, representing institutions of higher education, industrial enterprises and oceanographic institutions and state agencies.

202

Methane Hydrate Production Feasibility | Department of Energy  

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

Production Feasibility Production Feasibility Methane Hydrate Production Feasibility The red curves are temperature profiles for various water depths; the blue line shows methane hydrate stability relative to temperature and pressure. The area enclosed by the two curves represents the area of methane hydrate stability. The red curves are temperature profiles for various water depths; the blue line shows methane hydrate stability relative to temperature and pressure. The area enclosed by the two curves represents the area of methane hydrate stability. Methane, the predominant component of natural gas, forms hydrate in the presence of water, low temperatures and high pressures. Alternatively, when the temperature is increased or the pressure decreased so that hydrates are outside their stability field, they dissociate into methane and water.

203

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

204

The potential of mean force of nitrous oxide in a 1,2-dimyristoylphosphatidylcholine lipid bilayer  

E-Print Network [OSTI]

specific binding sites. The penetration bar- rier correlates strongly with the action rate penetration and partitioning between lipid and water is an important step toward elucidating the function of N2O as a general anesthetic. After all, N2O has to penetrate through mem- branes before it reaches

205

Activation of Pd-Ag Catalyst for Selective Hydrogenation of Acetylene via Nitrous Oxide Addition  

Science Journals Connector (OSTI)

Hydrogenation of acetylene in the presence of a large excess of ethylene has been investigated on the Pd-Ag catalyst under 60°C and a space velocity...?1.... It was found that an enhancement in the performance of...

Piyasan Praserthdam; Suphot Phatanasri…

2000-05-01T23:59:59.000Z

206

Quantification of and Controls on Dinitrogen and Nitrous Oxide Fluxes from Terrestrial Ecosystems  

E-Print Network [OSTI]

and lowest in a mixed conifer forest soil from the Blodgettin a northern hardwood-conifer forest. Soil Science Societyfir Yellow pine forest Mixed conifer and hardwood Oak

Yang, Wendy Hui-I

2010-01-01T23:59:59.000Z

207

Biological sources and sinks of nitrous oxide and strategies to mitigate emissions  

Science Journals Connector (OSTI)

...of organic nitrogen (eutrophication...m of the water column...affect the solubility of N2O...with other gases CO2, CH4...to yield nitrogen gas, e.g...laughing gas. Water Atmos. 15...2005 Global nitrogen enrichment...

2012-01-01T23:59:59.000Z

208

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...

209

Unexpected nondenitrifier nitrous oxide reductase gene diversity and abundance in soils  

Science Journals Connector (OSTI)

...contributors to N2O consumption. Apparently, a large...contributions to N2O consumption will advance understanding...flux models. Fossil fuel combustion, agricultural practices...electron donor, and the vessels were inoculated with...contributing to N 2 O consumption in soils...

Robert A. Sanford; Darlene D. Wagner; Qingzhong Wu; Joanne C. Chee-Sanford; Sara H. Thomas; Claribel Cruz-García; Gina Rodríguez; Arturo Massol-Deyá; Kishore K. Krishnani; Kirsti M. Ritalahti; Silke Nissen; Konstantinos T. Konstantinidis; Frank E. Löffler

2012-01-01T23:59:59.000Z

210

Photolysis of Nitrous Oxide Isotopomers Studied by Time-Dependent Hermite Propagation  

Science Journals Connector (OSTI)

The model agrees with available experimental enrichment factors and stratospheric balloon infrared remote sensing data to within the estimated error. ...

Matthew S. Johnson; Gert Due Billing; Alytis Gruodis; Maurice H. M. Janssen

2001-09-05T23:59:59.000Z

211

Biological sources and sinks of nitrous oxide and strategies to mitigate emissions  

Science Journals Connector (OSTI)

...used to produce biodiesel and bioethanol...replacement of the fossil fuel by biofuel. It...cereals include engineering bacteria to recognize...considered was the introduction of the nitrogenase...It provides an introduction and background...microbiology, (ii) engineering crop plants to...

2012-01-01T23:59:59.000Z

212

The Resolution of Mixtures of Carbon Dioxide and Nitrous Oxide by Gas Solid Chromatography  

Science Journals Connector (OSTI)

......1106. R. P. DeGrazio The Dow Chemical Company, Rocky Flats Division, Golden, Colorado The Resolution of Mixtures...Chromatography* by R. P. DeGrazio, The Dow Chemical Company, Rocky Flats Division, Golden, Colorado A simple and unique chromato......

R. P. DeGrazio

1965-06-01T23:59:59.000Z

213

Modeling Seasonal Variations in Carbon Dioxide and Nitrous Oxide in the Vadose Zone  

Science Journals Connector (OSTI)

...temperature, and soil atmosphere composition were being monitored was specifically...and CEL pools were predominant in the composition of the maize residue and were mainly...also taken into account. agriculture agrochemicals Avignon France Cambisols CANTIS carbon...

P. Cannavo; F. Lafolie; B. Nicolardot; P. Renault

214

Nitrous oxide and carbon dioxide emissions from pelletized and nonpelletized poultry litter incorporated into soil  

Science Journals Connector (OSTI)

While several studies have shown that the addition of animal manures to soil can increase N2O and CO2 emissions, limited information is available on the effect that manure physical characteristics can have on the...

M. L. Cabrera; S. C. Chiang; W. C. Merka; O. C. Pancorbo; S. A. Thompson

215

Nitrous oxide emissions from soils: how well do we understand the processes and their controls?  

Science Journals Connector (OSTI)

...1365-2486.2010.02351.x ) 56 Birch, HF , Friend, MT. 1956 Humus decomposition...covariance measurements using quantum cascade laser spectrometery over a Swiss forest. Biogeosciences...review of applications of model-data fusion to studies of terrestrial carbon fluxes...

2013-01-01T23:59:59.000Z

216

Methane- and Sulfur-Metabolizing Microbial Communities Dominate the Lost City Hydrothermal Field Ecosystem  

Science Journals Connector (OSTI)

...physically associated with Gulf of Mexico gas hydrates. Appl. Environ...hydrate mounds in the Gulf of Mexico. FEMS Microbiol. Ecol. 46...bioenergetics in the Yellowstone geothermal ecosystem. Proc. Natl. Acad...methane-oxidizing Bacteria as well as methanogenic and anaerobic...

William J. Brazelton; Matthew O. Schrenk; Deborah S. Kelley; John A. Baross

2006-09-01T23:59:59.000Z

217

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

218

Doubling of atmospheric methane supported  

SciTech Connect (OSTI)

Atmospheric methane over the past 27,000 years was measured by analyzing air trapped in glacial ice in Greenland and Antarctica. Atmospheric concentrations were stable over that period until about 200 years b.p. In the last 200 years they have more than doubled. This change in concentration is correlated with the increase in human population; the implications for climate modification are discussed. 1 figure, 3 references.

Kerr, R.A.

1984-11-23T23:59:59.000Z

219

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

220

A study on the solubility of heavy hydrocarbons in liquid methane and methane containing mixtures.  

E-Print Network [OSTI]

??The solubilities of the hydrocarbons n-butane, n-pentane, n-hexane, n-octane, and n-nonane in liquid methane and of n-hexane in the mixed solvents of methane and ethane… (more)

Brew, T. C. L.

2009-01-01T23:59:59.000Z

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

Chapter 14 - Coal bed methane  

Science Journals Connector (OSTI)

Publisher Summary Methane adsorbed to the surface of coal is a very old issue with some new commercial ramifications. This explosive gas has made underground coal mines dangerous both from the risk of explosion and the possibility of an oxygen-poor atmosphere that wouldn't support life. The miner's main concern with coal bed methane (CBM) has been how to get rid of it. Techniques to deal with CBM in mines have ranged from the classic canary in a cage to detect an oxygen-poor atmosphere to huge ventilation fans to force the replacement of a methane-rich environment with outside air, to drilling CBM wells in front of the coal face to try to degas the coal prior to exposing the mine to the CBM. All these techniques have met with some amount of success. None of the techniques to prevent CBM from fouling the air in an underground mine has been totally successful. With the CBM's unique method of gas storage, the preponderance of the gas is available only to very low coalface pressures. The coalface pressure is set by a combination of flowing wellhead pressure and the hydrostatic head exerted by standing liquid within the well bore. Effective compression strategies can lower the wellhead pressure to very low values. Effective deliquification techniques can reduce or remove the backpressure caused by accumulated liquid. CBM's economic impact is briefly explained in this chapter.

James F. Lea; Henry V. Nickens; Mike R. Wells

2008-01-01T23:59:59.000Z

222

NETL: Methane Hydrates - DOE/NETL Projects  

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

Characterization and Decomposition Kinetic Studies of Methane Hydrate in Host Sediments under Subsurface Mimic Conditions Last Reviewed 02/17/2010 Characterization and Decomposition Kinetic Studies of Methane Hydrate in Host Sediments under Subsurface Mimic Conditions Last Reviewed 02/17/2010 EST-380-NEDA Goal The purpose of this study is to establish sediment lithology and quantification of methane in hydrates hosted in fine-grained sediments from the Gulf of Mexico (GoM), a marine site of methane hydrate occurrence. The results will help establish a correlation between laboratory data and hydrate accumulation field data on dispersed hydrates in the natural environment. Performer Brookhaven National Laboratory (BNL), Upton, New York 11973 Background Gas hydrates are located in permafrost and marine environments and show potential as a vast methane source worldwide. However, methane is about 17 times more potent a greenhouse gas than CO2 and the inherent instability of

223

Methane Hydrates R&D Program  

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

Methane Hydrates R&D Program Methane Hydrates R&D Program Gas hydrates are a naturally-occurring combination of methane gas and water that form under specific conditions of low temperature and high pressure. Once thought to be rare in nature, gas hydrates are now known to occur in great abundance in association with arctic permafrost and in the shallow sediments of the deep-water continental shelves. The most recent estimates of gas hydrate abundance suggest that they contain

224

,"Federal Offshore California Coalbed Methane Proved Reserves...  

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

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Federal Offshore California Coalbed Methane Proved Reserves (Billion Cubic Feet)",1,"Annual",2013...

225

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...

226

,"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...

227

,"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...

228

,"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...

229

,"Miscellaneous States Coalbed Methane Proved Reserves (Billion...  

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

Coalbed Methane Proved Reserves (Billion Cubic Feet)" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Latest Data for"...

230

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

231

,"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...

232

,"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...

233

,"Pennsylvania Coalbed Methane Proved Reserves (Billion Cubic...  

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

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

234

,"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...

235

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

236

,"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...

237

,"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...

238

,"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...

239

,"California - Coastal Region Coalbed Methane Proved Reserves...  

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

Coalbed Methane Proved Reserves (Billion Cubic Feet)" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Latest Data for"...

240

FUEL CELLS – SOLID OXIDE FUEL CELLS | Internal and External Reformation  

Science Journals Connector (OSTI)

Three basic concepts of solid oxide fuel cell (SOFC) systems operating on hydrocarbon fuels, with external, internal, and partial prereforming, respectively, are presented and discussed. Internal reforming of methane is advantageously used for additional cooling of the SOFC stack, thus increasing system efficiency. Basic thermodynamics, catalysis, and kinetics of the methane steam reforming process are presented. Examples of SOFC stacks operating on internal reforming of methane and simulated partial prereforming of mine gas and natural gas are discussed. The latter is used to illustrate the effect of internal methane reforming on heat management in SOFC stacks.

L.G.J. de Haart; R. Peters

2009-01-01T23:59:59.000Z

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

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.

242

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

243

Oxidation of Carbon Monoxide in Cell Extracts of Pseudomonas carboxydovorans  

Science Journals Connector (OSTI)

...Winzer. 1932. Uber die Bildung von Essigsaure bei der biologischen Umsetzung von Kohlenoxyd und Kohlensaure mit Wasserstoff zu Methan. Biochem. Z. 245:2-12. 9. Fuchs, G., G. Andress, and R. K. Thauer. 1975. CO- oxidation by anaerobic...

Ortwin Meyer; Hans G. Schlegel

1979-02-01T23:59:59.000Z

244

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...

245

Three-dimensional model synthesis of the global methane cycle  

E-Print Network [OSTI]

39, Ehhalt, D. H. , The atmo•heric cycle of methane, Tellugworld-wide increase in t•heric methane, 1978-1987, Science,

1991-01-01T23:59:59.000Z

246

Texas--State Offshore Coalbed Methane Proved Reserves (Billion...  

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

1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Proved Reserves as of Dec. 31 Texas State Offshore Coalbed Methane Proved Reserves, Reserves Changes, and...

247

Louisiana--State Offshore Coalbed Methane Proved Reserves (Billion...  

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

1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Proved Reserves as of Dec. 31 LA, State Offshore Coalbed Methane Proved Reserves, Reserves Changes, and...

248

Federal Offshore--Texas Coalbed Methane Proved Reserves (Billion...  

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

Release Date: 12312015 Referring Pages: Coalbed Methane Proved Reserves as of Dec. 31 Federal Offshore Texas Coalbed Methane Proved Reserves, Reserves Changes, and Production...

249

California--State Offshore Coalbed Methane Proved Reserves (Billion...  

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

Next Release Date: 12312015 Referring Pages: Coalbed Methane Proved Reserves as of Dec. 31 CA, State Offshore Coalbed Methane Proved Reserves, Reserves Changes, and Production...

250

Texas--RRC District 9 Coalbed Methane Production (Billion Cubic...  

Gasoline and Diesel Fuel Update (EIA)

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production TX, RRC District 9 Coalbed Methane Proved Reserves,...

251

North Dakota Coalbed Methane Proved Reserves (Billion Cubic Feet...  

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

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Proved Reserves as of Dec. 31 North Dakota Coalbed Methane Proved...

252

Texas--RRC District 6 Coalbed Methane Production (Billion Cubic...  

Gasoline and Diesel Fuel Update (EIA)

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production TX, RRC District 6 Coalbed Methane Proved Reserves,...

253

California (with State off) Coalbed Methane Proved Reserves ...  

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

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Proved Reserves as of Dec. 31 California Coalbed Methane Proved Reserves,...

254

Alaska (with Total Offshore) Coalbed Methane Production (Billion...  

Gasoline and Diesel Fuel Update (EIA)

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production Alaska Coalbed Methane Proved Reserves, Reserves...

255

Texas--RRC District 1 Coalbed Methane Production (Billion Cubic...  

Gasoline and Diesel Fuel Update (EIA)

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production TX, RRC District 1 Coalbed Methane Proved Reserves,...

256

Alaska (with Total Offshore) Coalbed Methane Proved Reserves...  

Gasoline and Diesel Fuel Update (EIA)

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Proved Reserves as of Dec. 31 Alaska Coalbed Methane Proved Reserves,...

257

Michigan Coalbed Methane Proved Reserves (Billion Cubic Feet...  

Gasoline and Diesel Fuel Update (EIA)

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Proved Reserves as of Dec. 31 Michigan Coalbed Methane Proved Reserves,...

258

Other States Natural Gas Coalbed Methane, Reserves Based Production...  

Gasoline and Diesel Fuel Update (EIA)

Other States Natural Gas Coalbed Methane, Reserves Based Production (Billion Cubic Feet) Other States Natural Gas Coalbed Methane, Reserves Based Production (Billion Cubic Feet)...

259

California (with State off) Coalbed Methane Production (Billion...  

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

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production California Coalbed Methane Proved Reserves, Reserves...

260

Texas (with State Offshore) Coalbed Methane Proved Reserves ...  

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

Texas (with State Offshore) Coalbed Methane Proved Reserves (Billion Cubic Feet) Texas (with State Offshore) Coalbed Methane Proved Reserves (Billion Cubic Feet) Decade Year-0...

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

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

262

Louisiana--South Onshore Coalbed Methane Proved Reserves (Billion...  

Gasoline and Diesel Fuel Update (EIA)

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Proved Reserves as of Dec. 31 LA, South Onshore Coalbed Methane Proved...

263

New York Coalbed Methane Production (Billion Cubic Feet)  

Gasoline and Diesel Fuel Update (EIA)

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production New York Coalbed Methane Proved Reserves, Reserves...

264

Texas--RRC District 5 Coalbed Methane Proved Reserves (Billion...  

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

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Proved Reserves as of Dec. 31 TX, RRC District 5 Coalbed Methane Proved...

265

Texas--RRC District 1 Coalbed Methane Proved Reserves (Billion...  

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

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Proved Reserves as of Dec. 31 TX, RRC District 1 Coalbed Methane Proved...

266

North Dakota Coalbed Methane Production (Billion Cubic Feet)  

Gasoline and Diesel Fuel Update (EIA)

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production North Dakota Coalbed Methane Proved Reserves,...

267

Mississippi (with State off) Coalbed Methane Production (Billion...  

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

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production Mississippi Coalbed Methane Proved Reserves, Reserves...

268

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

269

Louisiana--South Onshore Coalbed Methane Production (Billion...  

Gasoline and Diesel Fuel Update (EIA)

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production LA, South Onshore Coalbed Methane Proved Reserves,...

270

Lower 48 Federal Offshore Coalbed Methane Production (Billion...  

Gasoline and Diesel Fuel Update (EIA)

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production Federal Offshore U.S. Coalbed Methane Proved...

271

Mississippi (with State off) Coalbed Methane Proved Reserves...  

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

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Proved Reserves as of Dec. 31 Mississippi Coalbed Methane Proved Reserves,...

272

Texas--RRC District 8 Coalbed Methane Production (Billion Cubic...  

Gasoline and Diesel Fuel Update (EIA)

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production TX, RRC District 8 Coalbed Methane Proved Reserves,...

273

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

274

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

275

Four Corners methane hotspot points to coal-related sources  

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

methane hotspot points to coal-related sources Methane is very efficient at trapping heat in the atmosphere and, like carbon dioxide, it contributes to global warming. October...

276

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

277

Technical Note Methane gas migration through geomembranes  

E-Print Network [OSTI]

and Fick's law. This chart can be used by landfill designers to evaluate the methane gas transmission rate for a selected geomembrane type and thickness and expected methane gas pressure in the landfill. KEYWORDS landfill usually consists, from bottom to top, of: graded landfill surface; a gas-venting layer; a low

278

Arctic Methane, Hydrates, and Global Climate  

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

Arctic Methane, Hydrates, and Global Climate Arctic Methane, Hydrates, and Global Climate Speaker(s): Matthew T. Reagan Date: March 17, 2010 - 12:00pm Location: 90-3122 Paleooceanographic evidence has been used to postulate that methane may have had a significant role in regulating past climate. However, the behavior of contemporary permafrost deposits and oceanic methane hydrate deposits subjected to rapid temperature changes, like those now occurring in the arctic and those predicted under future climate change scenarios, has only recently been investigated. A recent expedition to the west coast of Spitsbergen discovered substantial methane gas plumes exiting the seafloor at depths that correspond to the upper limit of the receding gas hydrate stability zone. It has been suggested that these plumes may be the

279

NETL: Methane Hydrates - DOE/NETL Projects  

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

Methane Recovery from Hydrate-bearing Sediments Last Reviewed 11/30/2011 Methane Recovery from Hydrate-bearing Sediments Last Reviewed 11/30/2011 DE-FC26-06NT42963 Goal The goal of this project is to develop observational and experimental data that can provide a better understanding of the basic mechanisms at work in a methane hydrate reservoir that is under production. To this end, a thorough physical understanding of underlying phenomena associated with methane hydrate production will be acquired through unique, multi-scale experiments and associated analyses. In addition, one or more mathematical models that account for the observed phenomena and provide insights that may help to optimize methane hydrate production methods will be developed. Performers Georgia Tech Research Corporation, Atlanta, Georgia 30332 Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee 37831

280

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

SciTech Connect (OSTI)

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. Promoted metal oxide catalysts were tested. Several of these exhibited similar high ethylene to ethane ratios and low carbon dioxide to carbon monoxide ratios observed for the NaCl/{alpha}-alumina catalyst system reported earlier. Research on catalysts containing potentially activated metals began with testing of metal molecular sieves. Silver catalysts were shown to be promising as low temperature catalysts. Perovskites were tested as potential methane coupling catalysts. A layered perovskite (K{sub 2}La{sub 2}Ti{sub 3}O{sub 10}) gave the highest C{sub 2} yield. Work continued on the economic evaluation of a hypothetical process converting methane to ethylene. An engineering model of the methane coupling system has been prepared. 47 refs., 17 figs., 57 tabs.

Warren, B.K.; Campbell, K.D.

1989-11-22T23:59:59.000Z

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

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

282

New Methane Hydrate Research: Investing in Our Energy Future | Department  

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

Methane Hydrate Research: Investing in Our Energy Future Methane Hydrate Research: Investing in Our Energy Future New Methane Hydrate Research: 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 or depressurized, it will release the trapped natural gas. Methane hydrates are 3D ice-lattice structures with natural gas locked inside. If methane hydrate is either warmed or depressurized, it will release the trapped natural gas. Jenny Hakun What Are Methane Hydrates? Methane hydrates are 3D ice-lattice structures with natural gas locked inside. The substance looks remarkably like white ice, but it does not behave like ice. If methane hydrate is either warmed or depressurized, it will release the trapped natural gas.

283

Methane Hydrates and Climate Change | Department of Energy  

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

Hydrates and Climate Change Hydrates and Climate Change Methane Hydrates and Climate Change Methane hydrates store huge volumes of methane formed by the bacterial decay of organic matter or leaked from underlying oil and natural gas deposits. The active formation of methane hydrates in the shallow crust prevents methane, a greenhouse gas, from entering the atmosphere. On the other hand, warming of arctic sediments or ocean waters has the potential to cause methane hydrate to dissociate, releasing methane into the deepwater sediments, the ocean or atmosphere. DOE is conducting research to understand the mechanisms and volumes involved in these little-studied processes. DOE environmental and climate change research projects related to Arctic methane hydrate deposits include: Characterization of Methane Degradation and Methane-Degrading

284

Diffusive Accumulation of Methane Bubbles in Seabed  

E-Print Network [OSTI]

We consider seabed bearing methane bubbles. In the absence of fractures the bubbles are immovably trapped in a porous matrix by surface tension forces; therefore the dominant mechanism of transfer of gas mass becomes the diffusion of gas molecules through the liquid. The adequate description of this process requires accounting "other-than-normal" (non-Fickian) diffusion effects, thermodiffusion and gravity action. We evaluate the diffusive flux of aqueous methane and predict the possibility of existence of bubble mass accumulation zones (which can appear independently from the presence/absence of hydrate stability zone) and effect of non-Fickian drift on the capacity of shallow and deep methane-hydrate deposits.

Goldobin, D S; Levesley, J; Lovell, M A; Rochelle, C A; Jackson, P; Haywood, A; Hunter, S; Rees, J

2010-01-01T23:59:59.000Z

285

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

286

E-Print Network 3.0 - atmospheric methane extracted Sample Search...  

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

search results for: atmospheric methane extracted Page: << < 1 2 3 4 5 > >> 1 Oceanic sediment methane, including methane clathrate hydrates (hydrates), is the Earth's largest...

287

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

288

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

289

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

290

Methane Digester Loan Program | Department of Energy  

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

Methane Digester Loan Program Methane Digester Loan Program Methane Digester Loan Program < Back Eligibility Agricultural Savings Category Bioenergy Maximum Rebate RFA can provide up to $250,000 of loan principal Program Info Funding Source Minnesota Rural Finance Authority (RFA) State Minnesota Program Type State Loan Program Rebate Amount RFA participation limited to 45% of loan principal Provider Minnesota Department of Agriculture 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 providing zero-interest loans to eligible borrowers. The loan program is part of the Rural Finance Authority (RFA) revolving loan fund, through which farmers can receive financial aid

291

Methane Hydrate Program Annual Report to Congress  

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

FY 2010 FY 2010 Methane Hydrate Program Annual Report to Congress September 2011 U.S. Department of ENERGY United States Department of Energy Washington, DC 20585 Department of Energy | September 2011 FY 2010 Methane Hydrate Program Annual Report to Congress | Page 2 Message from the Secretary Section 968 of the Energy Policy Act of 2005 requires the Department of Energy to submit to Congress an annual report on the results of methane hydrate research. I am pleased to submit the enclosed report entitled, U.S. Department of Energy FY 2010 Methane Hydrate Program Report to Congress. The report was prepared by the Department of Energy's Office of Fossil Energy and summarizes the progress being made in this important area of

292

NETL: Methane Hydrates - DOE/NETL Projects  

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

Laboratory Studies in Support of Characterization of Recoverable Resources from Methane Hydrate Deposits Last Reviewed 5/10/2012 Laboratory Studies in Support of Characterization of Recoverable Resources from Methane Hydrate Deposits Last Reviewed 5/10/2012 ESD05-048 Goal The project is bringing new laboratory measurements and evaluation techniques to bear on the difficult problems of characterization and gas recovery from methane hydrate deposits. Performer Lawrence Berkeley National Laboratory, Berkeley, CA 94720 Background LBNL is performing laboratory tests to provide data to support the characterization and development of methane hydrate deposits. Major areas of research underway include hydrologic measurements, combined geomechanical/geophysical measurements, and synthetic hydrate formation studies. Hydrologic Measurements Relatively little research has been done to experimentally determine

293

NETL: Methane Hydrates - DOE/NETL Projects  

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

Collection and Microbiological Analysis of Gas Hydrate Cores Collection and Microbiological Analysis of Gas Hydrate Cores FWP-4340-60 and FWP-42C1-01 Goal Determine the presence and activity of methanogens in methane hydrate-bearing sediments. Background The project was set up to determine a fundamental modeling parameter - the amount of methane generated in deep sediments by methanogenic microorganisms. This would allow methane distribution models of gas hydrate reservoirs to accurately reflect an unknown volume and the distribution of biogenic methane within in a reservoir. The personnel at INEL have experience in similar biologic research and are considered to be experts by their global peers. Performer Idaho National Engineering and Environmental Laboratory (INEEL) - sample collection and analysis Location

294

NETL: Methane Hydrates - DOE/NETL Projects  

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

Seismic-Scale Rock Physics of Methane Hydrate Seismic-Scale Rock Physics of Methane Hydrate DE-FC26-05NT42663 Goal The goal of this project was to establish rock physics models for use in generating synthetic seismic signatures of methane hydrate reservoirs. Ultimately, the intent was to improve seismic detection and quantification of offshore and onshore methane hydrate accumulations. Performer Stanford University, Stanford, CA 94305 Background Gas hydrate reservoir characterization is, in principle, no different from traditional hydrocarbon reservoir characterization. The seismic response of the subsurface is determined by the spatial distribution of the elastic properties (properties of the subsurface that deform as seismic waves pass through it) and attenuation. By mapping changes in the elastic properties, scientists can identify geologic features, including hydrocarbon reservoirs.

295

methane_hydrates | netl.doe.gov  

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

hydrate and its potential as a fuel source, please read the 2011 Methane Hydrates Primer. Information on other elements of the program can be found under the links below. Fire...

296

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

297

Mikrobiologie und Ökophysiologie des Methan-Kreislaufs  

Science Journals Connector (OSTI)

Methan ist ein Spurengas in der Atmosphäre (1,8 ppmv), dessen Konzentration aufgrund von anthropogenen Aktivitäten jährlich mit etwa 0,5–1% zunimmt. Es wird zusammen mit CO2, N2O (Lachgas), O3 (Ozon) und Fluorchl...

Professor em. Dr. sc. agr. habil. Johannes C. G. Ottow

2011-01-01T23:59:59.000Z

298

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...

299

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...

300

Montana Coalbed Methane Production (Billion Cubic Feet)  

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

Production (Billion Cubic Feet) Montana Coalbed Methane Production (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 12 12 13...

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

Virginia Coalbed Methane Production (Billion Cubic Feet)  

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

Production (Billion Cubic Feet) Virginia Coalbed Methane Production (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 56 81...

302

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...

303

Colorado Coalbed Methane Production (Billion Cubic Feet)  

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

Production (Billion Cubic Feet) Colorado Coalbed Methane Production (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1980's 12...

304

Alabama Coalbed Methane Production (Billion Cubic Feet)  

Gasoline and Diesel Fuel Update (EIA)

Production (Billion Cubic Feet) Alabama Coalbed Methane Production (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1980's 23...

305

Wyoming Coalbed Methane Production (Billion Cubic Feet)  

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

Production (Billion Cubic Feet) Wyoming Coalbed Methane Production (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 133 278...

306

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...

307

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...

308

Kansas Coalbed Methane Production (Billion Cubic Feet)  

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

Production (Billion Cubic Feet) Kansas Coalbed Methane Production (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 17 25 38...

309

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...

310

Oklahoma Coalbed Methane Production (Billion Cubic Feet)  

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

Production (Billion Cubic Feet) Oklahoma Coalbed Methane Production (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 58 68...

311

Arkansas Coalbed Methane Production (Billion Cubic Feet)  

Gasoline and Diesel Fuel Update (EIA)

Production (Billion Cubic Feet) Arkansas Coalbed Methane Production (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 2 3 3 3...

312

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...

313

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...

314

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...

315

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...

316

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...

317

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...

318

Utah Coalbed Methane Production (Billion Cubic Feet)  

Gasoline and Diesel Fuel Update (EIA)

Production (Billion Cubic Feet) Utah Coalbed Methane Production (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 74 83 103...

319

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...

320

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...

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

322

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...

323

Pennsylvania Coalbed Methane Production (Billion Cubic Feet)  

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

Production (Billion Cubic Feet) Pennsylvania Coalbed Methane Production (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 3 5...

324

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...

325

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...

326

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...

327

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...

328

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...

329

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...

330

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...

331

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...

332

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...

333

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...

334

Processes for Methane Production from Gas Hydrates  

Science Journals Connector (OSTI)

The main cost here is only that of the pipeline used to transport the gas to the production platform. For subsea systems that do not ... group of wells. Transporting methane from the production site to the shore ...

2010-01-01T23:59:59.000Z

335

Methane Hydrates R&D Program  

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

abundance suggest that they contain perhaps more organic carbon that all the world's oil, gas, and coal combined. The primary mission of the Methane Hydrates R&D Program is to...

336

Production of Syngas by Direct Catalytic Oxidation of Methane  

Science Journals Connector (OSTI)

...DESORPTION AT HIGH-TEMPERATURES...of abundant natural gas into liquid...a 50-mI high-pressure Autoclave...atmospheric pressure, and the...with very high CH4 yields...Contact times of gases within the...catalytic combustors and reactors...

D. A. Hickman; L. D. Schmidt

1993-01-15T23:59:59.000Z

337

Measurement of microbial oxidation of methane in lake water  

Science Journals Connector (OSTI)

Oct 5, 1973 ... displacing the water through a second 26-G needle. ... and the shaking of serum bottles was car- ried out in diffuse ... to power source;. 3-plastic.

338

Simultaneous Nitrite-Dependent Anaerobic Methane and Ammonium Oxidation Processes  

Science Journals Connector (OSTI)

...of global greenhouse gas emissions from waste: conclusions and strategies from the Intergovernmental...Stenstrom 2005. Greenhouse gas production: a comparison...detection of all bacteria: development and evaluation of a...classification genetics growth & development metabolism Bioreactors...

Francisca A. Luesken; Jaime Sánchez; Theo A. van Alen; Janeth Sanabria; Huub J. M. Op den Camp; Mike S. M. Jetten; Boran Kartal

2011-08-12T23:59:59.000Z

339

Rapid Methane Oxidation in a Landfill Cover Soil  

Science Journals Connector (OSTI)

...fluor (1) as 14CO2 after combustion; radiocarbon recovery...core was assayed by dry combustion of freeze-dried, homogenized...Label recovered by dry combustion represents 14CH4 assimilated into microbial biomass and inorganic matter...

S. C. Whalen; W. S. Reeburgh; K. A. Sandbeck

1990-11-01T23:59:59.000Z

340

Flame Stability of Methane and Syngas Oxy-fuel Steam Flames  

Science Journals Connector (OSTI)

The scaling relation [gF = c(SL2/?)] for different burner diameters was obtained for various diameter burners. ... The fuels used for these experiments were methane and syngas (CO–H2), which were burned with oxidants O2 and recirculated CO2 and H2O. Research-grade fuel and oxidant were delivered to the burners from pressurized tanks. ... Narrower flammable regimes and lower laminar burning velocity under oxy-fuel combustion conditions may lead to new stability challenges in operating oxy-coal burners. ...

B. K. Dam; N. D. Love; A. R. Choudhuri

2012-11-26T23:59:59.000Z

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

Methane Power Inc | Open Energy Information  

Open Energy Info (EERE)

Methane Power Inc Methane Power Inc Jump to: navigation, search Logo: Methane Power Inc. Name Methane Power Inc. Address 121 Edinburgh South Drive Place Cary, NC Zip 27511 Sector Renewable Energy Product Methane Power is a renewable energy project developer that focuses on landfill gas-to-energy projects. Currently, they are a supplier of landfill gas generated energy to Duke Energy in North Carolina. Phone number 919-297-7206 Website http://www.methanepower.net Coordinates 35.7395875°, -78.8029226° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.7395875,"lon":-78.8029226,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

342

Carbon deposition in steam reforming and methanation  

SciTech Connect (OSTI)

The purpose of this review is to survey recent studies of carbon deposition on metals used as catalysts in steam reforming and methanation, emphasizing research where significant progress has been made. Where possible, an attempt is made to treat the fundamental nature of carbon formation and deactivation by carbon and the relationships between these two phenomena. Steam reforming and methanation are emphasized in this review because (1) deactivation of catalysts by carbon deposits is a serious concern in both processes, (2) much of the previous research with carbon formation on metals involved one or the other of these two reactions, and (3) there are interesting differences and similarities between these two reactions; for example, methanation is typically carried out at moderate reaction temperatures (200-450/sup 0/C) while steam reforming is typically carried out at significantly higher reaction temperatures (600-900/sup 0/C). Yet the two reactions are very closely related, since methane steam reforming is the reverse of methanation of CO. Moreover, there is evidence that some of the carbons formed in these two different processes are similar in their morphology.

Bartholomew, C.H.

1982-01-01T23:59:59.000Z

343

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

344

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...

345

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

346

Ohio Coalbed Methane Proved Reserves (Billion Cubic Feet)  

Gasoline and Diesel Fuel Update (EIA)

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

347

U.S. Coalbed Methane Proved Reserves (Billion Cubic Feet)  

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

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

348

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

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

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

349

Texas--RRC District 4 Onshore Coalbed Methane Proved Reserves...  

Gasoline and Diesel Fuel Update (EIA)

4 Onshore Coalbed Methane Proved Reserves (Billion Cubic Feet) Texas--RRC District 4 Onshore Coalbed Methane Proved Reserves (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3...

350

Louisiana (with State Offshore) Coalbed Methane Proved Reserves...  

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

Coalbed Methane Proved Reserves (Billion Cubic Feet) Louisiana (with State Offshore) Coalbed Methane Proved Reserves (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4...

351

Texas--RRC District 2 Onshore Coalbed Methane Proved Reserves...  

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

Coalbed Methane Proved Reserves (Billion Cubic Feet) Texas--RRC District 2 Onshore Coalbed Methane Proved Reserves (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4...

352

Eastern States Coalbed Methane Production (Billion Cubic Feet...  

Gasoline and Diesel Fuel Update (EIA)

Coalbed Methane Production (Billion Cubic Feet) Eastern States Coalbed Methane Production (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8...

353

Western States Coalbed Methane Production (Billion Cubic Feet...  

Gasoline and Diesel Fuel Update (EIA)

Western States Coalbed Methane Production (Billion Cubic Feet) Western States Coalbed Methane Production (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...

354

Texas--RRC District 10 Coalbed Methane Proved Reserves (Billion...  

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

Coalbed Methane Proved Reserves (Billion Cubic Feet) Texas--RRC District 10 Coalbed Methane Proved Reserves (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5...

355

Alabama Coalbed Methane Proved Reserves (Billion Cubic Feet)  

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

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

356

Colorado Coalbed Methane Proved Reserves (Billion Cubic Feet...  

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

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

357

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...

358

NETL: Methane Hydrates - DOE/NETL Projects  

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

Gas Hydrate Production Trial Using CO2 / CH4 Exchange Completed Gas Hydrate Production Trial Using CO2 / CH4 Exchange Completed DE-NT0006553 Goal The goal of this project is to define, plan, conduct and evaluate the results of a field trial of a methane hydrate production methodology whereby carbon dioxide (CO2) molecules are exchanged in situ for methane (CH4) molecules within a hydrate structure, releasing the methane for production. The objective is to evaluate the viability of this hydrate production technique and to understand the implications of the process at a field scale. image showing Conceptual rendering of proposed CO2 - CH4 exchange methodology for the production of natural gas from hydrates Conceptual rendering of proposed CO2 - CH4 exchange methodology for the

359

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

360

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

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

MethaneHydrateRD_FC.indd  

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

gas is an important energy gas is an important energy resource for the United States, providing nearly one-quarter of total energy use. The Department of Energy's Office of Fossil Energy (FE) has played a major role in developing technologies to help tap new, unconventional sources of natural gas. FOSSIL ENERGY RESEARCH BENEFITS Methane Hydrate R&D "The (DOE) Program has supported and managed a high-quality research portf olio that has enabled signifi cant progress toward the (DOE) Program's long-term goals." The Nati onal Academies 2010 One of these is methane hydrate - molecules of natural gas trapped in ice crystals. Containing vast amounts of natural gas, methane hydrate occurs in a variety of forms in sediments within and below thick permafrost in Arctic regions, and in the

362

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

363

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

364

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

365

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

366

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 methane from wetlands will respond to future climatic change. Dr. Paul Bodelier (Netherlands Institute

MĂĽhlemann, Oliver

367

Detection and Production of Methane Hydrate  

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

July-September 2007 July-September 2007 Detection and Production of Methane Hydrate Submitted by: Rice University University of Houston George J. Hirasaki Department of Chemical and Biomolecular Engineering Rice University - MS 362 6100 Main St. Houston, TX 77251-1892 Phone: 713-348-5416; FAX: 713-348-5478; Email: gjh@rice.edu Prepared for: United States Department of Energy National Energy Technology Laboratory December, 2007 Office of Fossil Energy Table of Contents DOE Methane Hydrate Program Peer Review.................................................. 3 Task 5: Carbon Inputs and Outputs to Gas Hydrate Systems ........................... 3 Task 6: Numerical Models for Quantification of Hydrate and Free Gas Accumulations....................................................................................................

368

Design of an annular microchannel reactor (AMR) for hydrogen and/or syngas production via methane steam reforming  

Science Journals Connector (OSTI)

Abstract A bench-scale annular microchannel reactor (AMR) prototype with microchannel width of 0.3 mm and total catalyst length of 9.53 × 10?2 m active for the endothermic steam reforming of methane is presented. Experimental results at a steam to methane feed molar ratio of 3.3:1, reactor temperature of 1023 K, and pressure of 11 bar confirm catalyst power densities upwards of 1380 W per cm3 of catalyst at hydrogen yields >98% of thermodynamic equilibrium. A two-dimensional steady-state computational fluid dynamic model of the AMR prototype was validated using experimental data and subsequently employed to identify suitable operating conditions for an envisioned mass-production AMR design with 0.3 mm annular channel width and a single catalyst length of 254 mm. Thermal efficiencies, defined based upon methane and product hydrogen higher heating values (HHVs), of 72.7–57.7% were obtained from simulations for methane capacities of 0.5–2S LPM (space velocities of 195,000–782,000 h?1) at hydrogen yields corresponding to 99%–75% of equilibrium values. Under these conditions, analysis of local composition, temperature and pressure indicated that catalyst deactivation via coke formation or Nickel oxidation is not thermodynamically favorable. Lastly, initial analysis of an envisioned 10 kW autothermal reformer combining 19 parallel \\{AMRs\\} within a single methane-air combustion chamber, based upon existing manufacturing capabilities within Power & Energy, Inc., is presented.

Holly Butcher; Casey J.E. Quenzel; Luis Breziner; Jacques Mettes; Benjamin A. Wilhite; Peter Bossard

2014-01-01T23:59:59.000Z

369

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

370

File:Methane.pdf | Open Energy Information  

Open Energy Info (EERE)

Methane.pdf Methane.pdf Jump to: navigation, search File File history File usage File:Methane.pdf Size of this preview: 448 × 600 pixels. Go to page 1 2 3 4 5 Go! next page → next page → Full resolution ‎(1,218 × 1,630 pixels, file size: 929 KB, MIME type: application/pdf, 5 pages) File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 15:51, 9 February 2012 Thumbnail for version as of 15:51, 9 February 2012 1,218 × 1,630, 5 pages (929 KB) Graham7781 (Talk | contribs) You cannot overwrite this file. Edit this file using an external application (See the setup instructions for more information) File usage The following page links to this file: Hydraulic Fracturing Retrieved from "http://en.openei.org/w/index.php?title=File:Methane.pdf&oldid=404017"

371

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

372

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

373

California - Coastal Region Coalbed Methane Proved Reserves ...  

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

Coalbed Methane Proved Reserves (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 0 0 0 0 2010's 0 0 0 0 - No Data...

374

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

375

Global atmospheric methane: budget, changes and dangers  

Science Journals Connector (OSTI)

...contribute emissions to an air...larger. Reducing emissions from many...emissions related to economic...climate|greenhouse gas mitigation...Prospects for reducing emissions Methane is...reductions in greenhouse warming...agriculture, energy sectors...oil and gas) and landfills...

2011-01-01T23:59:59.000Z

376

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

377

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

378

Coal Bed Methane Protection Act (Montana) | Department of Energy  

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

Coal Bed Methane Protection Act (Montana) Coal Bed Methane Protection Act (Montana) Coal Bed Methane Protection Act (Montana) < Back Eligibility Utility Fed. Government Commercial Agricultural Investor-Owned Utility State/Provincial Govt Industrial Construction Municipal/Public Utility Local Government Rural Electric Cooperative Tribal Government Institutional Fuel Distributor Program Info State Montana Program Type Environmental Regulations Provider Montana Department of Natural Resources and Conservation 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 water right holders for damage to land and to water quality and availability that is attributable to the development of coal bed methane wells. The Act aims to provide for

379

Methane Hydrates - The National R&D Program  

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

Methane Hydrates R&D Program Methane Hydrates R&D Program The National Methane Hydrates R&D Program Welcome to the information portal for the National Methane Hydrate R&D Program. Over the past eight years, research carried out under this program has resulted in significant advances in our understanding of methane hydrates, their role in nature, and their potential as a future energy resource. This success is largely due to an unprecedented level of cooperation between federal agencies, industry, national laboratories, and academic institutions. For a quick introduction to methane hydrate and its potential as a fuel source, please read the 2011 Methane Hydrates Primer. Information on other elements of the program can be found under the remaining Key Links. Read More.

380

Regulation of methane genes and genome expression  

SciTech Connect (OSTI)

At the start of this project, it was known that methanogens were Archaeabacteria (now Archaea) and were therefore predicted to have gene expression and regulatory systems different from Bacteria, but few of the molecular biology details were established. The goals were then to establish the structures and organizations of genes in methanogens, and to develop the genetic technologies needed to investigate and dissect methanogen gene expression and regulation in vivo. By cloning and sequencing, we established the gene and operon structures of all of the “methane” genes that encode the enzymes that catalyze methane biosynthesis from carbon dioxide and hydrogen. This work identified unique sequences in the methane gene that we designated mcrA, that encodes the largest subunit of methyl-coenzyme M reductase, that could be used to identify methanogen DNA and establish methanogen phylogenetic relationships. McrA sequences are now the accepted standard and used extensively as hybridization probes to identify and quantify methanogens in environmental research. With the methane genes in hand, we used northern blot and then later whole-genome microarray hybridization analyses to establish how growth phase and substrate availability regulated methane gene expression in Methanobacterium thermautotrophicus ?H (now Methanothermobacter thermautotrophicus). Isoenzymes or pairs of functionally equivalent enzymes catalyze several steps in the hydrogen-dependent reduction of carbon dioxide to methane. We established that hydrogen availability determine which of these pairs of methane genes is expressed and therefore which of the alternative enzymes is employed to catalyze methane biosynthesis under different environmental conditions. As were unable to establish a reliable genetic system for M. thermautotrophicus, we developed in vitro transcription as an alternative system to investigate methanogen gene expression and regulation. This led to the discovery that an archaeal protein, designated TFE, that had sequences in common with the eukaryotic general transcription factor TFIIE, stimulated archaeal transcription initiation and that the archaeal TATA-box binding protein (TBP) remained attached to the promoter region whereas the transcription factor TFB dissociated from the template DNA following initiation. DNA sequences that directed the localized assembly of archaeal histones into archaeal nucleosomes were identified, and we established that transcription by an archaeal RNA polymerase was slowed but not blocked by archaeal nucleosomes. We developed a new protocol to purify archaeal RNA polymerases and with this enzyme and additional improvements to the in vitro transcription system, we established the template requirements for archaeal transcription termination, investigated the activities of proteins predicted to be methane gene regulators, and established how TrpY, a novel archaeal regulator of expression of the tryptophan biosynthetic operon functions in M. thermautotrophicus. This also resulted in the discovery that almost all M. thermautotrophicus mutants isolated as spontaneously resistant to 5-methyl tryptophan (5MTR) had mutations in trpY and were therefore 5MTR through de-repressed trp operon expression. This established a very simple, practical procedure to determine and quantify the DNA sequence changes that result from exposure of this Archaeon to any experimental mutagenesis protocol. Following the discovery that the Thermococcus kodakaraensis was amenable to genetic manipulation, we established this technology at OSU and subsequently added plasmid expression, a reporter system and additional genetic selections to the T. kodakaraensis genetic toolbox. We established that transcription and translation are coupled in this Archaeon, and by combining in vitro transcription and in vivo genetics, we documented that both TFB1 and TFB2 support transcription initiation in T. kodakaraensis. We quantified the roles of ribosome binding sequences and alternative initiation codons in translation initiation, established that polarity e

John N. Reeve

2009-09-09T23:59:59.000Z

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

Global metaanalysis of the nonlinear response of soil nitrous oxide (N2O) emissions to fertilizer nitrogen  

Science Journals Connector (OSTI)

...programs, the US Department of Energy Office of Science (Grant DE-FCO2-07ER64494) and Office of Energy Efficiency and Renewable Energy (Grant DE-ACO5-76RL01830...Tsukuba 36°02 N 140°12 E 12 Brazil Capivari, San Paolo 22°93...

Iurii Shcherbak; Neville Millar; G. Philip Robertson

2014-01-01T23:59:59.000Z

382

Global metaanalysis of the nonlinear response of soil nitrous oxide (N2O) emissions to fertilizer nitrogen  

Science Journals Connector (OSTI)

...selected field studies from the literature where in situ measurements of...and in studies identified in reviews by Bouwman (8), Jungkunst...Dataset S1) when available: literature reference; location...fertilizer. Glob Change Biol Bioenergy 16(1):156 ZZQQhy170...

Iurii Shcherbak; Neville Millar; G. Philip Robertson

2014-01-01T23:59:59.000Z

383

Association of Earthworm-Denitrifier Interactions with Increased Emission of Nitrous Oxide from Soil Mesocosms Amended with Crop Residue  

Science Journals Connector (OSTI)

...mug C kg1, and total mineral N content (extraction...respectively. We used a soda-lime filter during N2O measurements...within 48 h of sampling. Mineral N was extracted using...were also ball milled. Mineral N and MBN was converted...Netherlands) with a SYBR green detection system. Each...

Lucas D. Nebert; Jaap Bloem; Ingrid M. Lubbers; Jan Willem van Groenigen

2011-04-22T23:59:59.000Z

384

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

385

A post-Kyoto partner: Considering the stratospheric ozone regime as a tool to manage nitrous oxide  

Science Journals Connector (OSTI)

...There is a balance between ozone production...because the mass of N 2 O...such as wastewater, are developing...such as wastewater treatment and aquaculture...coal power plants) emit N...how to balance funding...nitric acid plants in the United...

David Kanter; Denise L. Mauzerall; A. R. Ravishankara; John S. Daniel; Robert W. Portmann; Peter M. Grabiel; William R. Moomaw; James N. Galloway

2013-01-01T23:59:59.000Z

386

Biodegradation of monoaromatic hydrocarbons by aquifer microorganisms using oxygen, nitrate, or nitrous oxide as the terminal electron acceptor.  

Science Journals Connector (OSTI)

...I. Mayfield. 1986. Remediation of gasoline-contaminated...Aerobic denitrification as an innovative method for in-situ biological remediation of contaminated sub- surface...underground storage tanks: remediation with emphasis on in situ...

S R Hutchins

1991-08-01T23:59:59.000Z

387

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

388

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

389

Atmos. Chem. Phys., 11, 88098823, 2011 www.atmos-chem-phys.net/11/8809/2011/  

E-Print Network [OSTI]

of the particulate matter were carbonaceous materials, such as humic acid, water sol- uble organics, and less soluble in public concern regarding the emission of atmospheric pollutants, including gas phase and particulate from livestock include methane (CH4), ammonia (NH3), nitrogen oxides (NOx), and nitrous oxide (N2O

Meskhidze, Nicholas

390

NETL: Methane Hydrates - DOE/NETL Projects  

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

In Situ Sampling and Characterization of Naturally Occurring Methane Hydrate Using the D/V JOIDES Resolution Last Reviewed 02/05/2010 In Situ Sampling and Characterization of Naturally Occurring Methane Hydrate Using the D/V JOIDES Resolution Last Reviewed 02/05/2010 DE-FC26-01NT41329 photo of a man showing the pressure core sampler on the deck of JOIDES Resolution Pressure core sampler on deck courtesy Texas A&M University Goal The goal of the project was to characterize hydrate accumulation at Hydrate Ridge (offshore Oregon) and improve the ability to use geophysical and subsurface logging to identify hydrates. A follow-on goal was to characterize hydrate accumulation at offshore Vancouver Island, BC, Canada. Background This project focused on physically verifying the existence of hydrates at Hydrate Ridge through the collection of pressurized and non-pressurized core samples and logging data. This study developed and tested tools to

391

NETL: Methane Hydrates - DOE/NETL Projects  

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

Detection and Production of Methane Hydrate Last Reviewed 5/15/2012 Detection and Production of Methane Hydrate Last Reviewed 5/15/2012 DE-FC26-06NT42960 Goal The goal of this project is to improve the understanding of regional and local differences in gas hydrate systems from three perspectives: as an energy resource, as a geohazard, and as a long-term influence on global climate. Performers Rice University, Houston, TX University of Texas, Austin, TX Oklahoma State University, Stillwater, OK Background Heterogeneity in the distribution of gas hydrate accumulations impacts all aspects of research into gas hydrate natural systems. The challenge is to delineate, understand, and appreciate these differences at the regional and local scales, where differences in in situ concentrations are relevant to the importance of gas hydrate as a resource, a geohazard, and a factor in

392

NETL: Methane Hydrates - DOE/NETL Projects  

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

- Methane Hydrate Research - Geoscience Evaluations and Field Studies Last Reviewed 3/18/2013 - Methane Hydrate Research - Geoscience Evaluations and Field Studies Last Reviewed 3/18/2013 Project Goals The primary goals of the DOE/NETL Natural Gas Hydrate Field Studies (NGHFS) project are: Conduct field-based studies that advance the ability to predict, detect, characterize, and understand distribution of and controls on natural gas hydrate occurrences. Analyze geologic, geochemical, and microbiologic data for indications of past and current changes to the stability of natural gas hydrate in marine settings. Develop links between the U.S. Gas Hydrate Program and international R&D efforts through direct participation in international field programs and workshops. Evaluate the potential role natural gas hydrates may play in the global carbon cycle through analysis of modern and paleo-natural gas

393

NETL: Methane Hydrates - DOE/NETL Projects  

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

– Formation and Dissociation of Methane Hydrates Last Reviewed 07/7/2011 – Formation and Dissociation of Methane Hydrates Last Reviewed 07/7/2011 Project Objective Observe hydrate formation and dissociation phenomena in various porous media and characterize hydrate-bearing sediments by estimating physical properties (kinetic parameters for hydrate formation and dissociation, thermal conductivity, permeability, relative permeability, and mechanical strength) to enhance fundamental understanding on hydrate formation and accumulation and to support numerical simulations and potential gas hydrate production Project Performers Yongkoo Seol – NETL Office of Research & Development Jeong Choi – Oak Ridge Institute for Science and Education Jongho Cha-Virginia Polytech Institute Project Location National Energy Technology Laboratory - Morgantown, West Virginia

394

NETL: Methane Hydrates - DOE/NETL Projects  

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

Phase 1 - Characterization and Qualification of the Methane Hydrate Resource Potential Associated with the Barrow Gas Fields Phase 1 - Characterization and Qualification of the Methane Hydrate Resource Potential Associated with the Barrow Gas Fields DE-FC26-06NT42962 Goal The goal of this project is to characterize and quantify the postulated gas hydrate resource associated with the Barrow Gas Fields – three producing fields located in a permafrost region near Barrow, the North Slope's biggest population center and economic hub. Map of the North Slope Borough showing the location of its eight major communities, including Barrow, the site of this research project. Map of the North Slope Borough showing the location of its eight major communities, including Barrow, the site of this research project. Performers North Slope Borough, Barrow, Alaska (North Slope Borough) 99723

395

NETL: Methane Hydrates - DOE/NETL Projects  

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

Methane Hydrate Production from Alaskan Permafrost Last Reviewed 02/05/2010 Methane Hydrate Production from Alaskan Permafrost Last Reviewed 02/05/2010 DE-FC26-01NT41331 photo of new Anadarko drilling rig in place at Hot Ice No.1 on Alaska's North Slope Hot Ice No. 1 Drilling Platform courtesy Anadarko Petroleum Corp. Goal The goal of the project was to develop technologies for drilling and recovering hydrates in arctic areas. The specific objectives were to drill, core, and test a well through the hydrate stability zone in northern Alaska Performers Maurer Technology, Inc.* - Project coordination with DOE Anadarko Petroleum Corporation - Overall project management for the design, construction, and operation of the Arctic Drilling Platform and mobile core lab, and field coring operations Noble Engineering and Development* - Real time data collection and

396

Detection and Production of Methane Hydrate  

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

Oil & Natural Gas Technology Oil & Natural Gas Technology DOE Award No.: DE-FC26-06NT42960 Quarterly Progress Report Reporting Period: April-June 2007 Detection and Production of Methane Hydrate Submitted by: Department of Chemical and Biomolecular Engineering Rice University - MS 362 6100 Main St. Houston, TX 77251-1892 Prepared for: United States Department of Energy National Energy Technology Laboratory August, 2007 Office of Fossil Energy Detection and Production of Methane Hydrate Quarterly Progress Report Reporting Period: April-June 2007 Prepared by: George Hirasaki Rice University August 2007 CONTRACT NO. DE-FC26-06NT42960 Department of Chemical and Biomolecular Engineering Rice University - MS 362 6100 Main St. Houston, TX 77251-1892 Phone: 713-348-5416; Fax: 713-348-5478; Email: gjh@rice.edu

397

Methane Hydrate Field Studies | Department of Energy  

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

Field Studies Field Studies Methane Hydrate Field Studies Arctic/Alaska North Slope Field Studies Since 2001, DOE has conducted field trials of exploration and production technology in the Alaska North Slope. Although Alaska methane hydrate resources are smaller than marine deposits and currently lack outlets to commercial markets, Alaska provides an excellent laboratory to study E&P technology. The research also has implications for various Alaska resources, including potential gas hydrate resources for local communities, conventional "stranded" gas, as well as Alaska's large unconventional oil resources. The hydrate deposits have been delineated in the process of developing underlying oil fields, and drilling costs are much lower than offshore. DOE-BP Project

398

Enhanced carbon monoxide utilization in methanation process  

DOE Patents [OSTI]

Carbon monoxide - containing gas streams are passed over a catalyst to deposit a surface layer of active surface carbon thereon essentially without the formation of inactive coke. The active carbon is subsequently reacted with steam or hydrogen to form methane. Surprisingly, hydrogen and water vapor present in the feed gas do not adversely affect CO utilization significantly, and such hydrogen actually results in a significant increase in CO utilization.

Elek, Louis F. (Peekskill, NY); Frost, Albert C. (Congers, NY)

1984-01-01T23:59:59.000Z

399

Direct catalytic conversion of methane and light hydrocarbon gases. Quarterly report No. 8, July 16--September 30, 1988  

SciTech Connect (OSTI)

The goal of this research is to develop catalysts that directly convert methane and light hydrocarbons to intermediates that later can be converted to either liquid fuels or value-added chemicals, as economics dictate. During this reporting period, we investigated the behavior of some of our catalysts under working conditions using diffuse reflectance fourier transform infrared spectroscopy (DRIFT). Two catalysts (FeRu{sub 3} and Ru{sub 4} on magnesia) were examined under nitrogen, and the Ru{sub 4}/MgO system was examined under a methane/argon mixture. We synthesized ruthenium clusters supported on carbon as catalysts for methane reforming and new phthalocyanines to be used as catalyst precursors for oxidizing methane to methanol. The Ru{sub 4} and FeRu{sub 3} complexes supported on magnesia exhibited very different behavior in the DRIFT cell when heated under nitrogen. The FeRu{sub 3}/MgO system was completely decarbonylated by 400{degrees}C, while spectrum of the Ru{sub 4} system displayed carbonyl peaks until the temperature rose to over 600{degrees}C. The ru{sub 4}/MgO system behaved almost identically under methane/argon as it did under nitrogen in the carbonyl region. In the C-H region of the spectrum (2800-3100 cm{sup {minus}1}), peaks were observed under methane but not under nitrogen. The intensity of these peaks did not vary with temperature. We synthesized new catalysts by supporting the Ru{sub 4} and Ru{sub 6} clusters on carbon. Both acidic zeolites (Type Y or 5A) and basic magnesia (MgO) have been observed to react with hydrocarbons at high temperatures; these reactions generally lead to coking, then deactivation of the catalyst contained on these supports. We expect carbon to be a truly inert support.

Wilson, R.B. Jr.; Posin, B.M.; Chan, Yee Wai

1989-03-01T23:59:59.000Z

400

NETL: Methane Hydrates - DOE/NETL Projects  

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

Support of Gulf of Mexico Hydrate Research Consortium: Activities to Support Establishment of Sea Floor Monitoring Station Support of Gulf of Mexico Hydrate Research Consortium: Activities to Support Establishment of Sea Floor Monitoring Station DE-FC26-02NT41328 Goal Determine the potential impacts of gas hydrate instability in terms of the release of methane into seafloor sediments, the ocean and the atmosphere. Performers University of California, San Diego (Scripps Institution of Oceanography) - manage geochemical, hydrological and sedimentological investigations Texas A&M University - manage field monitoring program Location La Jolla, California 92093 Background This project will monitor, characterize, and quantify the rates of formation and dissociation of methane gas hydrates at and near the seafloor in the northern Gulf of Mexico, and determine linkages between formation/dissociation and physical/chemical parameters of the deposits over the course of a year. The stability and response of shallow gas hydrates to temperature and chemical perturbations will be monitored in situ, and localized seafloor and water column environmental impacts of hydrate formation and dissociation characterized. The following will be determined: 1) The equilibrium/steady state conditions for structure II methane gas hydrates at the field site,2) whether the system is in dynamic equilibrium and the local hydrology is characterized by steady state episodic fluid flow, and 3) how fluid fluxes and fluid composition work together to dynamically influence gas hydrate stability.

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

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

402

International Cooperation in Methane Hydrates | Department of Energy  

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

Oil & Gas » Methane Hydrate » Oil & Gas » Methane Hydrate » International Cooperation in Methane Hydrates International Cooperation in Methane Hydrates In 1982 the multi-national Deep Sea Drilling Program (DSDP) recovered the first subsea substantial methane hydrate deposits, which spurred methane hydrate research in the US and other countries. The successor programs, the Ocean Drilling Program (ODP) and the Integrated Ocean Drilling Program (IODP) sampled hydrate deposits off Oregon (ODP 204, 2002) and in the Cascadia Margin off Vancouver Island, Canada (ODP 146, 1992 and IODP 311, 2005). In the Atlantic Ocean off the US, ODP Leg 146 sampled hydrate deposits on the Blake Ridge and Carolina Rise in 1995. International cooperation helps scientists in the US and other countries

403

METHANE HYDRATE ADVISORY COMMITTEE U.S. Department of Energy  

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

METHANE HYDRATE ADVISORY COMMITTEE METHANE HYDRATE ADVISORY COMMITTEE U.S. Department of Energy Advisory Committee Charter - - - - ---- ---- ------~ 1. Committee's Official Designation. Methane Hydrate Advisory Committee (MHAC) 2. Authority:. This charter establishes the Methane Hydrate Advisory Committee (Committee) pursuant to Title IX, Subtitle F, Section 968, Methane Hydrate Research of the Energy Policy Act of 2005 (EPACT), Public Law 109-58. This charter establishes the MHAC under the authority of the Department of Energy (DOE). The MHAC is being renewed in accordance with the provisions of the Federal Advisory Committee Act (FACA), as amended, 5 U.S.C., App.2. 3. Objectives and Scope of Activities. The Committee provides advice to the Secretary of Energy by developing recommendations and broad programmatic priorities for the methane

404

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

405

Methane steam reforming at low temperature: Effect of light alkanes’ presence on coke formation  

Science Journals Connector (OSTI)

Abstract Steam reforming of natural gas for the production of hydrogen at low operation temperature offers significant financial and environmental advantages. However, the presence of higher hydrocarbons as minor components of natural gas can significantly affect the formation of coke and thus the effectiveness of the catalyst. In this study, the effect of the presence of C2–C3 alkanes in the feedstock on the carbon accumulation during low temperature steam reforming of methane is investigated over Ni and Rh catalysts supported on lanthanum doped ceria–zirconia mixed oxide. Both catalysts showed high resistance to coke formation and especially in the case of Rh/La/CeO2–ZrO2, the carbon accumulation detected was low even after 10 h on stream in steam reforming of all mixtures of hydrocarbons tested. The presence of higher alkanes in methane increased the amount of carbon on Ni(10)CeZrLa compared to pure methane as well as the nature of the carbonaceous species. Increase in the C-number of the additive alkane had almost no influence on the total amount of carbon formed (C/H feed ratio = constant) but favored the formation of filamentous carbon.

Sofia D. Angeli; Fotis G. Pilitsis; Angeliki A. Lemonidou

2015-01-01T23:59:59.000Z

406

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

407

Hydrogen production in Multi-Channel Membrane Reactor via Steam Methane Reforming and Methane Catalytic Combustion  

Science Journals Connector (OSTI)

Abstract A novel Multi-Channel Membrane Reactor (MCMR) was designed and built for the small-scale production of hydrogen via Steam Methane Reforming (SMR). The prototype alternates an SMR gas channel to produce hydrogen catalytically, with a Methane Catalytic Combustion (MCC) gas channel to provide the heat of reaction needed by the endothermic reforming. A palladium–silver membrane inside the reforming gas channel shifts the reaction equilibrium, allowing lower operating temperatures, and producing pure hydrogen in a single vessel. Using an innovative air-spray coating technique, channels were coated with Ru–MgO–La2O3/?-Al2O3 and Pd/?-Al2O3 catalyst particles for the SMR and MCC reactions, respectively. Results for the proof-of-concept MCMR showed that methane conversion in the reformer of 91% and a hydrogen purity in excess of 99.99% were possible with the reformer operating at 570 °C and 15 bar.

Alexandre Vigneault; John R. Grace

2014-01-01T23:59:59.000Z

408

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

409

,"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",2012,"6...

410

Warum Methan in der Atmosphäre ansteigt — Die Rolle von Archaebakterien  

Science Journals Connector (OSTI)

Methan ist ein brennbares Gas, das nach seiner Herkunft auch als Erdgas, Grubengas oder Sumpfgas bezeichnet wird. Es ist der einfachste Kohlenwasserstoff. Seine Summenformel ist CH4.

Rudolf K. Thauer

1992-01-01T23:59:59.000Z

411

Spektroskopische Vorgänge in Explosionszonen von Methan und anderen Kohlenwasserstoffen  

Science Journals Connector (OSTI)

Zur Untersuchung gelangen stehende Explosionen von Methan-Sauerstoff und vergleichsweise die von Acetylen- bzw. Benzoldampf-Sauerstoff. Die einzelnen Zonen bei der Verbrennung werden spektrographisch festgehal...

F. J. Lauer

1933-01-01T23:59:59.000Z

412

,"New York Coalbed Methane Proved Reserves (Billion Cubic Feet...  

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

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

413

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,...

414

,"California--State Offshore Coalbed Methane Proved Reserves...  

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

Of Series","Frequency","Latest Data for" ,"Data 1","California--State Offshore Coalbed Methane Proved Reserves (Billion Cubic Feet)",1,"Annual",2013 ,"Release...

415

,"Texas (with State Offshore) Coalbed Methane Proved Reserves...  

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

Of Series","Frequency","Latest Data for" ,"Data 1","Texas (with State Offshore) Coalbed Methane Proved Reserves (Billion Cubic Feet)",1,"Annual",2013 ,"Release...

416

,"Louisiana--State Offshore Coalbed Methane Proved Reserves ...  

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

Of Series","Frequency","Latest Data for" ,"Data 1","Louisiana--State Offshore Coalbed Methane Proved Reserves (Billion Cubic Feet)",1,"Annual",2013 ,"Release...

417

,"Lower 48 Federal Offshore Coalbed Methane Proved Reserves ...  

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

Of Series","Frequency","Latest Data for" ,"Data 1","Lower 48 Federal Offshore Coalbed Methane Proved Reserves (Billion Cubic Feet)",1,"Annual",2013 ,"Release...

418

,"Texas--State Offshore Coalbed Methane Proved Reserves (Billion...  

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

Of Series","Frequency","Latest Data for" ,"Data 1","Texas--State Offshore Coalbed Methane Proved Reserves (Billion Cubic Feet)",1,"Annual",2013 ,"Release...

419

,"Louisiana (with State Offshore) Coalbed Methane Proved Reserves...  

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

Of Series","Frequency","Latest Data for" ,"Data 1","Louisiana (with State Offshore) Coalbed Methane Proved Reserves (Billion Cubic Feet)",1,"Annual",2013 ,"Release...

420

,"Federal Offshore--Texas Coalbed Methane Proved Reserves (Billion...  

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

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Federal Offshore--Texas Coalbed Methane Proved Reserves (Billion Cubic Feet)",1,"Annual",2013...

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

,"Alaska (with Total Offshore) Coalbed Methane Proved Reserves...  

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

Of Series","Frequency","Latest Data for" ,"Data 1","Alaska (with Total Offshore) Coalbed Methane Proved Reserves (Billion Cubic Feet)",1,"Annual",2013 ,"Release...

422

,"Kansas Coalbed Methane Proved Reserves (Billion Cubic Feet...  

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

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

423

,"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...

424

,"Louisiana--South Onshore Coalbed Methane Proved Reserves (Billion...  

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

Coalbed Methane Proved Reserves (Billion Cubic Feet)" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Latest Data for"...

425

,"Virginia Coalbed Methane Proved Reserves (Billion Cubic Feet...  

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

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

426

,"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...

427

,"Montana Coalbed Methane Proved Reserves (Billion Cubic Feet...  

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

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

428

,"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...

429

,"Michigan Coalbed Methane Proved Reserves (Billion Cubic Feet...  

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

Coalbed Methane Proved Reserves (Billion Cubic Feet)" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Latest Data for"...

430

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...

431

,"Ohio Coalbed Methane Proved Reserves (Billion Cubic Feet)"  

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

Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Ohio Coalbed Methane Proved Reserves (Billion Cubic Feet)",1,"Annual",2010 ,"Release...

432

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...

433

,"Colorado Coalbed Methane Proved Reserves (Billion Cubic Feet...  

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

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

434

,"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...

435

,"Alabama Coalbed Methane Proved Reserves (Billion Cubic Feet...  

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

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

436

,"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...

437

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...

438

,"Louisiana--North Coalbed Methane Proved Reserves (Billion Cubic...  

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

Coalbed Methane Proved Reserves (Billion Cubic Feet)" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Latest Data for"...

439

,"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...

440

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

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


441

,"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...

442

,"Florida Coalbed Methane Proved Reserves (Billion Cubic Feet...  

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

Coalbed Methane Proved Reserves (Billion Cubic Feet)" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Latest Data for"...

443

,"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...

444

,"Utah Coalbed Methane Proved Reserves (Billion Cubic Feet)"  

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

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

445

,"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...

446

,"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...

447

,"Arkansas Coalbed Methane Proved Reserves (Billion Cubic Feet...  

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

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

448

,"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...

449

,"Oklahoma Coalbed Methane Proved Reserves (Billion Cubic Feet...  

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

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

450

,"U.S. 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","U.S. Coalbed Methane Proved Reserves, Reserves Changes, and Production",10,"Annual",2013,"630...

451

,"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...

452

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...

453

,"North Dakota Coalbed Methane Proved Reserves (Billion Cubic...  

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

Coalbed Methane Proved Reserves (Billion Cubic Feet)" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Latest Data for"...

454

,"Wyoming Coalbed Methane Proved Reserves (Billion Cubic Feet...  

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

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

455

,"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...

456

,"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...

457

,"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...

458

,"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...

459

,"Lower 48 States Coalbed Methane Proved Reserves (Billion Cubic...  

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

Coalbed Methane Proved Reserves (Billion Cubic Feet)" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description"," Of Series","Frequency","Latest Data for"...

460

,"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...

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

,"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...

462

,"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...

463

,"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...

464

,"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...

465

,"U.S. Coalbed Methane Proved Reserves (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 Proved Reserves (Billion Cubic Feet)",1,"Annual",2013 ,"Release...

466

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...

467

,"West Virginia Coalbed Methane Proved Reserves (Billion Cubic...  

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

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

468

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

469

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

470

Presentations from June 6-7 2013 Methane Hydrates Advisory Meeting...  

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

June 6-7 2013 Methane Hydrates Advisory Meeting Presentations from June 6-7 2013 Methane Hydrates Advisory Meeting ConocoPhillips test results and data analysis Methane Hydrate...

471

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

472

Syngas methanation for substitute natural gas over Ni–Mg/Al2O3 catalyst in fixed and fluidized bed reactors  

Science Journals Connector (OSTI)

Abstract A comparative study was conducted for laboratory syngas methanation over a self-made Ni–Mg/Al2O3 catalyst to demonstrate the technical advantages of fluidized bed over fixed bed reactor. At different reaction temperatures, gas velocities and pressures, the CO conversion and selectivity to CH4 in fluidized bed were shown to be higher than in fixed bed, and much closer to the thermodynamic equilibriums. The spent catalysts from fluidized bed methanation had distinctively low and easy-oxidizing deposited carbon in comparison with that from fixed bed. The results were attributed to the bigger effective catalytic surface, better heat and mass transfer in fluidized bed reactor.

Jiao Liu; Wenlong Shen; Dianmiao Cui; Jian Yu; Fabing Su; Guangwen Xu

2013-01-01T23:59:59.000Z

473

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

474

Effect of Sulfur Compounds and Higher Homologues of Methane on Hydrogen Cyanide Production by the Andrussow Method  

Science Journals Connector (OSTI)

The influence of sulfur compounds, higher homologues of methane on the parameters ofoxidative ammonolysis of methane was studied.

N. V. Trusov

2001-10-01T23:59:59.000Z

475

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

476

Methane Steam Reforming in Hydrogen-permeable Membrane Reactor for Pure Hydrogen Production  

Science Journals Connector (OSTI)

Steam reforming of methane over a ruthenium catalyst has been carried ... hydrogen separation from the reaction mixture, the methane conversion significantly exceeds the equilibrium value, which ... an important ...

Yasuyuki Matsumura; Jianhua Tong

2008-12-01T23:59:59.000Z

477

Texas--RRC District 8A Coalbed Methane Production (Billion Cubic...  

Gasoline and Diesel Fuel Update (EIA)

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production TX, RRC District 8A Coalbed Methane Proved Reserves,...

478

Texas--RRC District 8A Coalbed Methane Proved Reserves (Billion...  

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

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Proved Reserves as of Dec. 31 TX, RRC District 8A Coalbed Methane Proved...

479

Texas--RRC District 7C Coalbed Methane Production (Billion Cubic...  

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

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production TX, RRC District 7C Coalbed Methane Proved Reserves,...

480

Texas--RRC District 7B Coalbed Methane Proved Reserves (Billion...  

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

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Proved Reserves as of Dec. 31 TX, RRC District 7B Coalbed Methane Proved...

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

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

482

Texas--RRC District 7B Coalbed Methane Production (Billion Cubic...  

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

company data. Release Date: 1242014 Next Release Date: 12312015 Referring Pages: Coalbed Methane Estimated Production TX, RRC District 7B Coalbed Methane Proved Reserves,...

483

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...

484

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...

485

Methane Production from Acetate and Associated Methane Fluxes from Anoxic Coastal Sediments  

Science Journals Connector (OSTI)

...ORGANIC-RICH COASTAL MARINE BASIN .1. METHANE SEDIMENT-WATER...IRRIGATION IN CAPE LOOKOUT BIGHT, NORTH-CAROLINA, SCIENCE...sediments ofa small coastal basin on the Outer Banks ofNorth...site was Cape Lookout Bight, North Carolina, an organic-rich marine basin of approximately 2 km2...

FRANCIS J. SANSONE; CHRISTOPHER S. MARTENS

1981-02-13T23:59:59.000Z

486

Water production in enhanced coalbed methane operations  

Science Journals Connector (OSTI)

Coalbed methane (CBM) formations provides a considerable amount of the US natural gas production and have the potential of storing significant amounts of carbon dioxide (CO2) through enhanced gas recovery operations. Enhanced coalbed methane (ECBM) recovery by injection of CO2 or a mixture of CO2 and nitrogen (N2) has been proven to recover additional natural gas resources. However, since coalbeds are normally saturated with water and can be in communication with an aquifer, a large amount of water is often co-produced during the natural gas extraction. The conventional approach for CBM production relies on the reduction of the gas partial pressure in the coal seam. This can be accomplished by either pumping the formation water to the surface and/or by injecting gases such as N2 and CO2. Disposal of the produced water is an environmental challenge as harmful impurities must be removed by appropriate purification techniques. Consequently, a reduction of water production in CBM operations is desirable. In this paper we present a numerical investigation of the potential reduction in water production during ECBM operations that are commonly used to increase methane (CH4) recovery. We use a three-dimensional coalbed model with an aquifer located at the bottom to investigate the amounts of gas and water produced in ECBM operations per volume of coal seam as a function of aquifer strength and sorption characteristics including sorption induced strain. The amount of gas/water that is produced varies significantly depending on the aquifer strength and injection gas composition. We demonstrate that injection of CO2 and/or N2 in some settings reduces the water handling problem substantially. CBM is an important worldwide energy source with a large number of formations being excellent candidates for ECBM recovery processes. Our analysis of the interplay between coal characteristics, aquifer support and the resultant behavior in terms of gas/water production provides valuable input for optimization of future planning and operations.

M. Jamshidi; K. Jessen

2012-01-01T23:59:59.000Z

487

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

488

Bonding Strength by Methane Hydrate Formed among Sand Particles  

Science Journals Connector (OSTI)

The mechanical properties of methane hydrate?bearing sand were investigated by low temperature and high confining pressure triaxial testing apparatus in the present study. The specimens were prepared by infiltrating the methane gas into partially saturated sand specimen under the given temperature and stress condition which is compatible with the phase equilibrium condition for the stability of methane hydrate. The tests were firstly performed to investigate the effect of temperature on the shear behaviour of the specimen. Then the effect of backpressure was investigated. The strength of methane hydrate bearing sand increased as the temperature decreased and the back pressure increased. The bonding strength due to methane hydrate was dependent on methane hydrate saturation temperature and back pressure but independent of effective stress. Dissociation tests of methane hydrate were also performed by applying the temperature to the specimen at the various initial stress conditions. The marked development of shear and volumetric strains were observed due to dissociation of the methane hydrate in the specimen corresponding to the initial stress conditions.

M. Hyodo; Y. Nakata; N. Yoshimoto; R. Orense; J. Yoneda

2009-01-01T23:59:59.000Z

489

Storms, polar deposits and the methane cycle in Titan's atmosphere  

Science Journals Connector (OSTI)

...2004GL021415 . Lorenz, R.D , 2006The sand seas on Titan: Cassini RADAR...Stevenson1985Thermodynamics of clathrate hydrate at low and high pressures with...constituent, methane, exists as a gas, liquid and solid, and cycles...constituent, methane, exists as a gas, liquid and solid, and cycles...

2009-01-01T23:59:59.000Z

490

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

491

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 signatures w20& lighter (m ÂĽ Ă?57.8&, Ă?1.6& s.e., n ÂĽ 8). Repairing leaky natural gas distribution systems

Jackson, Robert B.

492

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.

493

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

494

Methane Hydrate Production Technologies to be Tested on Alaska's North  

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

Methane Hydrate Production Technologies to be Tested on Alaska's Methane Hydrate Production Technologies to be Tested on Alaska's North Slope Methane Hydrate Production Technologies to be Tested on Alaska's North Slope October 24, 2011 - 1:00pm Addthis Washington, DC - The U.S. Department of Energy, the Japan Oil, Gas and Metals National Corporation, and ConocoPhillips will work together to test innovative technologies for producing methane gas from hydrate deposits on the Alaska North Slope. The collaborative testing will take place under the auspices of a Statement of Intent for Cooperation in Methane Hydrates signed in 2008 and extended in 2011 by DOE and Japan's Ministry of Economy, Trade, and Industry. The production tests are the next step in both U.S. and Japanese national efforts to evaluate the response of gas hydrate reservoirs to alternative

495

Energy Department Advances Research on Methane Hydrates - the World's  

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

Research on Methane Hydrates - the Research on Methane Hydrates - the World's Largest Untapped Fossil Energy Resource Energy Department Advances Research on Methane Hydrates - the World's Largest Untapped Fossil Energy Resource August 31, 2012 - 1:00pm Addthis Washington, DC - The Energy Department today announced the selection of 14 new research projects across 11 states that will be a part of an expanding portfolio of projects designed to increase our understanding of methane hydrates' potential as a future energy supply. Methane hydrates are 3D ice-lattice structures with natural gas locked inside, and are found both onshore and offshore - including under the Arctic permafrost and in ocean sediments along nearly every continental shelf in the world. Today's projects build on the completion of a successful, unprecedented test

496

EA-1157: Methyl Chloride via Oxyhydrochlorination of Methane: A Building  

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

57: Methyl Chloride via Oxyhydrochlorination of Methane: A 57: Methyl Chloride via Oxyhydrochlorination of Methane: A Building Black for Chemicals and Fuels from Natural Gas, Carrollton, Kentucky EA-1157: Methyl Chloride via Oxyhydrochlorination of Methane: A Building Black for Chemicals and Fuels from Natural Gas, Carrollton, Kentucky SUMMARY This EA evaluates the environmental impacts for the proposal to advance Oxyhydrochlorination technology to an integrated engineering-scale process. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD September 27, 1996 EA-1157: Finding of No Significant Impact Methyl Chloride via Oxyhydrochlorination of Methane: A Building Black for Chemicals and Fuels from Natural Gas September 27, 1996 EA-1157: Final Environmental Assessment Methyl Chloride via Oxyhydrochlorination of Methane: A Building Black for

497

Energy Department Advances Research on Methane Hydrates - the World's  

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

Energy Department Advances Research on Methane Hydrates - the Energy Department Advances Research on Methane Hydrates - the World's Largest Untapped Fossil Energy Resource Energy Department Advances Research on Methane Hydrates - the World's Largest Untapped Fossil Energy Resource August 31, 2012 - 1:20pm Addthis News Media Contact (202) 586-4940 WASHINGTON, D.C. - The Energy Department today announced the selection of 14 new research projects across 11 states that will be a part of an expanding portfolio of projects designed to increase our understanding of methane hydrates' potential as a future energy supply. Methane hydrates are 3D ice-lattice structures with natural gas locked inside, and are found both onshore and offshore - including under the Arctic permafrost and in ocean sediments along nearly every continental shelf in the world.

498

DOE Announces $2 Million Funding for Methane Hydrates Projects | Department  

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

DOE Announces $2 Million Funding for Methane Hydrates Projects DOE Announces $2 Million Funding for Methane Hydrates Projects DOE Announces $2 Million Funding for Methane Hydrates Projects November 7, 2005 - 12:43pm Addthis Seeks to Unlock World's Biggest Potential Source of "Ice That Burns" WASHINGTON, DC - The Department of Energy (DOE) today announced a total of $2 million in funding to five research projects that will assess the energy potential, safety, and environmental aspects of methane hydrate exploration and development. Termed the "ice that burns," methane hydrates are crystalline solids that release a flammable gas when melted. They are considered the Earth's biggest potential source of hydrocarbon energy and could be a key element in meeting natural gas demand in the United States,

499

Reducible Oxide Based Oxygen Carriers for Chemical Looping Combustion and Partial Oxidation of Methane.  

E-Print Network [OSTI]

??Chemical looping combustion (CLC) is a novel combustion technology that offers a highly efficient route towards clean combustion of fuel with inherent CO2 capture. In… (more)

Bhavsar, Saurabh

2014-01-01T23:59:59.000Z

500

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