Powered by Deep Web Technologies
Note: This page contains sample records for the topic "digester gases 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

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

2

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

3

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,...

4

Improving the Methane Production in the Co-Digestion of Microalgae and Cattle Manure  

E-Print Network [OSTI]

that biogas production increased when algae was added to the digester. The highest methane production in the control groups, containing only manure, digestion sludge, and newsprint was 48120 L, while the highest in the mixtures containing algae and pretreated...

Cantu, Matthew Scott

2014-04-28T23:59:59.000Z

5

Greenhouse gases emissions accounting for typical sewage sludge digestion with energy utilization and residue land application in China  

SciTech Connect (OSTI)

Highlights: Black-Right-Pointing-Pointer GHGs emissions from sludge digestion + residue land use in China were calculated. Black-Right-Pointing-Pointer The AD unit contributes more than 97% of total biogenic GHGs emissions. Black-Right-Pointing-Pointer AD with methane recovery is attractive for sludge GHGs emissions reduction. - Abstract: About 20 million tonnes of sludge (with 80% moisture content) is discharged by the sewage treatment plants per year in China, which, if not treated properly, can be a significant source of greenhouse gases (GHGs) emissions. Anaerobic digestion is a conventional sewage sludge treatment method and will continue to be one of the main technologies in the following years. This research has taken into consideration GHGs emissions from typical processes of sludge thickening + anaerobic digestion + dewatering + residue land application in China. Fossil CO{sub 2}, biogenic CO{sub 2}, CH{sub 4,} and avoided CO{sub 2} as the main objects is discussed respectively. The results show that the total CO{sub 2}-eq is about 1133 kg/t DM (including the biogenic CO{sub 2}), while the net CO{sub 2}-eq is about 372 kg/t DM (excluding the biogenic CO{sub 2}). An anaerobic digestion unit as the main GHGs emission source occupies more than 91% CO{sub 2}-eq of the whole process. The use of biogas is important for achieving carbon dioxide emission reductions, which could reach about 24% of the total CO{sub 2}-eq reduction.

Niu Dongjie, E-mail: niudongjie@tongji.edu.cn [Key Laboratory of Yangtze Aquatic Environment, Ministry of Education, College of Environmental Science and Engineering of Tongji University, 1239 Siping Road, Shanghai 200092 (China); UNEP-Tongji Institute of Environment for Sustainable Development, 1239 Siping Road, Shanghai 200092 (China); Huang Hui [Key Laboratory of Yangtze Aquatic Environment, Ministry of Education, College of Environmental Science and Engineering of Tongji University, 1239 Siping Road, Shanghai 200092 (China); Dai Xiaohu [Key Laboratory of Yangtze Aquatic Environment, Ministry of Education, College of Environmental Science and Engineering of Tongji University, 1239 Siping Road, Shanghai 200092 (China); National Engineering Research Center for Urban Pollution Control, Shanghai 200092 (China); Zhao Youcai [Key Laboratory of Yangtze Aquatic Environment, Ministry of Education, College of Environmental Science and Engineering of Tongji University, 1239 Siping Road, Shanghai 200092 (China)

2013-01-15T23:59:59.000Z

6

MARINE BIOMASS SYSTEM: ANAEROBIC DIGESTION AND PRODUCTION OF METHANE  

E-Print Network [OSTI]

Municipal Solid Waste-Sewage Sludge. b 4.15 SCF CH 4 / cu ftUP I j methane 31.5 scf sludge 18.61b water 161b Btu/scfsewer 65.3 lb ( 7.9 gal) sludge ash 1.74 lb stack emissions

Haven, Kendall F.

2011-01-01T23:59:59.000Z

7

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 ...

8

Anaerobic Digestion Basics | Department of Energy  

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

Anaerobic Digestion Basics Anaerobic Digestion Basics Anaerobic Digestion Basics August 14, 2013 - 1:07pm Addthis Anaerobic digestion is a common technology in today's agriculture, municipal waste, and brewing industries. It uses bacteria to break down waste organic materials into methane and other gases, which can be used to produce electricity or heat. Methane and Anaerobic Bacteria Methane is a gas that contains molecules of methane with one atom of carbon and four atoms of hydrogen (CH4). It is the major component of the natural gas used in many homes for cooking and heating. It is odorless, colorless, and yields about 1,000 British thermal units (Btu) [252 kilocalories (kcal)] of heat energy per cubic foot (0.028 cubic meters) when burned. Natural gas is a fossil fuel that was created eons ago by the anaerobic

9

Fact #825: June 16, 2014 Tier 3 Non-Methane Organic Gases Plus...  

Energy Savers [EERE]

organic gases (NMOG) and nitrogen oxides (NOx) that new light vehicles with gasoline engines are allowed to produce for model years 2017 to 2025. These standards apply to...

10

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

11

Anaerobic Digestion of Algae  

Science Journals Connector (OSTI)

...would be desirable to remove the algae from the lagoon effluent. Under...anaerobic digestion. Digestion of algae to provide a source of fuel is an attractive possibility...through the anaerobic digestion of algae to produce methane. Energy is...

C. G. Golueke; W. J. Oswald; H. B. Gotaas

1957-01-01T23:59:59.000Z

12

Environmental Assessment for the Methane Energy and Agricultural Development Port of Tillamook Bay Dairy Digester Project Tillamook County, Oregon (01/02)  

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

2 2 ENVIRONMENTAL ASSESSMENT METHANE ENERGY and AGRICULTURAL DEVELOPMENT PORT of TILLAMOOK BAY DAIRY DIGESTER PROJECT TILLAMOOK COUNTY, OREGON January 2002 U.S. Department of Energy National Energy Technology Laboratory National Environmental Policy Act (NEPA) Compliance Cover Sheet Proposed Action: The U.S. Department of Energy (DOE) proposes to provide funds for the construction and start-up of a manure digester at the Port of Tillamook Bay (POTB) Industrial Park, Tillamook County, Oregon. If approved, DOE would provide funding to construct this dairy digester that would produce the following marketable products; 295 kW of electric power from biogas, hot water used to maintain the temperature of the digester, and about 30 cubic yards per year of solids for composting.

13

Optimizing the Operation of a Two-Phase Anaerobic Digestion System Digesting Grass Silage  

Science Journals Connector (OSTI)

Methane Yields from Grass Biomethane Digesters ... biomethane potential test ... biomethane potential test ...

Abdul-Sattar Nizami; Jerry D. Murphy

2011-07-25T23:59:59.000Z

14

Stable isotope and water quality analysis of coal bed methane production waters and gases from the Bowen Basin, Australia  

Science Journals Connector (OSTI)

Coal bed methane (CBM) is a significant growing industry in Queensland's energy sector. It is, however, a relatively new industry with little local water quality data and stable isotope compositions of production waters and gases available in the public domain. This study aims to determine whether water quality and stable isotope data can be correlated with gas and groundwater production and flow pathways, and identify zones of recharge and water mixing. Stable isotope analysis and accessory water quality tests were conducted on CBM production gas and water samples collected from two CBM producing bituminous coal seams within a single field in the Bowen Basin. In the production field, the reservoir seams are gently folded with eastwardly dipping fold axes, and compartmentalised by an ENE normal fault on the flank of a broad central anticline that contains minor faults. For one seam, splitting and a change in coal quality parallels the fault and fold axes. Although virgin reservoir conditions were similar, differing production performance north and south of the main fault suggests it acts as a barrier to water and gas flow along strike. The stable isotope analysis on the production water showed that waters with more positive ?D and ?18O compositions were associated with areas of higher water production and shallower depths, whereas more negative ?D and ?18O compositions were associated with lower water production and high gas production. The gas isotope analysis showed that production gases had both biogenic and thermogenic origins and that secondary biogenic gas generated through CO2 reduction comprises a significant portion of the CBM produced from this field. More negative CH4 ?13C values characterize the zones of meteoric recharge in shallow, up-dip areas. Gas production data and CO2 ?13C values suggest that this may result from 13CH4 stripping by the recharge waters and/or increased biogenic activity in this area. Smaller CO2–CH4 carbon isotopic fractionation values characterized zones of meteoric recharge, whereas higher isotopic fractionation values characterized the high gas production domain.

E.C.P. Kinnon; S.D. Golding; C.J. Boreham; K.A. Baublys; J.S. Esterle

2010-01-01T23:59:59.000Z

15

Investigation of feasibility of injecting power plant waste gases for enhanced coalbed methane recovery from low rank coals in Texas  

E-Print Network [OSTI]

such as power plants. CO2 emissions can be offset by sequestration of produced CO2 in natural reservoirs such as coal seams, which may initially contain methane. Production of coalbed methane can be enhanced through CO2 injection, providing an opportunity...

Saugier, Luke Duncan

2004-09-30T23:59:59.000Z

16

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

17

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

18

Ultrasonic sludge disintegration for enhanced methane production in anaerobic digestion: effects of sludge hydrolysis efficiency and hydraulic retention time  

Science Journals Connector (OSTI)

Hydrolysis of waste activated sludge (WAS) has been regarded as the rate limiting step of anaerobic sludge digestion. Therefore, in this study, the ... effect of ultrasound and hydraulic residence time during sludge

Dong-Jin Kim; Jonghak Lee

2012-01-01T23:59:59.000Z

19

THE FUTURE OF ENERGY GASES David G. Howell, Editor  

E-Print Network [OSTI]

totally independent of oil. Methane is found in association with coal; it is a byproduct of metabolic the term "energy gases" to distinguish those natural gases, primarily methane, that have utility for energy consequences associated with an expanded role of energy gases? Energy gases, particularly methane, are commonly

20

Direct catalytic conversion of methane and light hydrocarbon gases. Quarterly report No. 10, January 1--March 31, 1989  

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. In this reporting period, we have utilized samples of magnesia differing in their pretreatment temperature. Both the hydrido-ruthenium complex H{sub 4}Ru{sub 4}(CO){sub 12} and its reaction product with triethyl aluminum were reacted with these samples. The two ruthenium clusters are expected to react with the magnesia surface in different ways: by deprotonation of the hydride through an acid-base reaction with the basic surface, or by hydrolysis of the aluminum-carbon bond of the triethyl aluminum adduct. The concentration of hydroxyl groups on the magnesia surface able to hydrolyze the aluminum-carbon bond for immobilation should vary depending on the temperature of the pretreatment; the concentration of basic sites which can deprotonate the cluster should also vary with temperature. These differences were borne out by the experiment. We also compared the activity of two batches of AlRu{sub 4}/MgO which had been synthesized at different times in the project. Both batches had approximately the same activity, but the newer batch had greater selectivity for C{sub 6+} hydrocarbons.

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

1989-05-19T23:59:59.000Z

Note: This page contains sample records for the topic "digester gases 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

E-Print Network 3.0 - anaerobic digestion concept Sample Search...  

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

to methane. The anaerobic digestion consortium was introduced to high... M, and a biogas composition of 55%-60% methane. INTRODUCTION Economic evaluations of ... Source:...

22

E-Print Network 3.0 - anaerobic closed digester Sample Search...  

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

to methane. The anaerobic digestion consortium was introduced to high... M, and a biogas composition of 55%-60% methane. INTRODUCTION Economic evaluations of ... Source:...

23

Separation of polar gases from nonpolar gases  

DOE Patents [OSTI]

Polar gases such as hydrogen sulfide, sulfur dioxide and ammonia may be separated from nonpolar gases such as methane, nitrogen, hydrogen or carbon dioxide by passing a mixture of polar and nonpolar gases over the face of a multicomponent membrane at separation conditions. The multicomponent membrane which is used to effect the separation will comprise a mixture of a glycol plasticizer having a molecular weight of from about 200 to about 600 and an organic polymer cast on a porous support. The use of such membranes as exemplified by polyethylene glycol and silicon rubber composited on polysulfone will permit greater selectivity accompanied by a high flux rate in the separation process.

Kulprathipanja, S.; Kulkarni, S.S.

1986-08-26T23:59:59.000Z

24

Separation of polar gases from nonpolar gases  

DOE Patents [OSTI]

Polar gases such as hydrogen sulfide, sulfur dioxide and ammonia may be separated from nonpolar gases such as methane, nitrogen, hydrogen or carbon dioxide by passing a mixture of polar and nonpolar gases over the face of a multicomponent membrane at separation conditions. The multicomponent membrane which is used to effect the separation will comprise a mixture of a glycol plasticizer having a molecular weight of from about 200 to about 600 and an organic polymer cast on a porous support. The use of such membranes as exemplified by polyethylene glycol and silicon rubber composited on polysulfone will permit greater selectivity accompanied by a high flux rate in the separation process.

Kulprathipanja, Santi (Hoffman Estates, IL); Kulkarni, Sudhir S. (Hoffman Estates, IL)

1986-01-01T23:59:59.000Z

25

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

26

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

27

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

28

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

29

Ruminant digestion  

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

Ruminant digestion Ruminant digestion Name: hignell Status: N/A Age: N/A Location: N/A Country: N/A Date: Around 1993 Question: How long it takes for the digestive process to work in a ruminant? With the various chambers and would digestion take longer than in other mammals? Replies: A friend in animal nutrition is looking up an exact figure, but as he does, here are a few guidelines: Time of digestion largely depends on the type of food an animal ingests: CARNIVORES: short, uncomplicated digestive systems. They eat very high on the food chain (other animals), which provide food stuff which is relatively easy to digest. Hence, rapid digestion. OMNIVORES: medium length, medium complex digestive systems. We eat at all levels of the food chain, and so need a balanced system. Medium time of digestion (roughly 2-10 hours per meal, depending on proportions of carbohydrates, fats, proteins).

30

Biochemical methane potential and biodegradability of complex organic substrates Rodrigo A. Labatut  

E-Print Network [OSTI]

digestion. In Germany there are over 500 anaerobic digestion facilities for the treatment of the organic biogas plants (Rosch et al., 2009). To anticipate the overall impact and methane yields of such a diverse

Angenent, Lars T.

31

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

32

Digestion Experiments  

E-Print Network [OSTI]

Blank in Bulletin] BULLETIN NO. 291 FEBRUARY, 1922 DIGESTION EXPERIMENTS This is the sixth bulletin in a series whose object is to ascertain the Aceding value of Texas feeding stuffs by means of digestion experiments. Previous bulletins... The productive values and the values for digestible protein in t Bulletin have been calculated from the results of digestion esperiine? with sheep. The method of conducting the experiments is described Bulletins Nos. 147 and 166 of this Station. The production...

Fraps, G. S. (George Stronach)

1922-01-01T23:59:59.000Z

33

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

34

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

35

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

36

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

37

Photoenhanced anaerobic digestion of organic acids  

DOE Patents [OSTI]

A process is described for rapid conversion of organic acids and alcohols anaerobic digesters into hydrogen and carbon dioxide, the optimal precursor substrates for production of methane. The process includes addition of photosynthetic bacteria to the digester and exposure of the bacteria to radiant energy (e.g., solar energy). The process also increases the pH stability of the digester to prevent failure of the digester. Preferred substrates for photosynthetic bacteria are the organic acid and alcohol waste products of fermentative bacteria. In mixed culture with methanogenic bacteria or in defined co-culture with non-aceticlastic methanogenic bacteria, photosynthetic bacteria are capable of facilitating the conversion or organic acids and alcohols into methane with low levels of light energy input.

Weaver, Paul F. (Golden, CO)

1990-01-01T23:59:59.000Z

38

Anaerobic Digestion (AD): not only methane  

Broader source: Energy.gov [DOE]

Breakout Session 1: New Developments and Hot Topics Session 1-C: Beyond Biofuels Larry Baresi, Professor of Biology, California State University, Northridge

39

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

40

Optimization of solid state anaerobic digestion of the OFMSW by digestate recirculation: A new approach  

Science Journals Connector (OSTI)

Abstract Dry anaerobic digestion (AD) of OFMSW was optimized in order to produce biogas avoiding the use of solid inoculum. Doing so the dry AD was performed irrigating the solid waste with liquid digestate (flow rate of 1:1.18–1:0.9 w/w waste/digestate; 21 d of hydraulic retention time – HRT) in order to remove fermentation products inhibiting AD process. Results indicated that a high hydrolysis rate of organic matter (OM) and partial biogas production were obtained directly during the dry AD. Hydrolysate OM was removed from digester by the percolate flow and it was subsequently used to feed a liquid anaerobic digester. During dry AD a total loss of 36.9% of total solids was recorded. Methane balance indicated that 18.4% of potential methane can be produced during dry AD and 49.7% by the percolate. Nevertheless results obtained for liquid AD digestion indicated that only 20.4% and 25.7% of potential producible methane was generated by adopting 15 and 20 days of HRT, probably due to the AD inhibition due to high presence of toxic ammonia forms in the liquid medium.

Pognani Michele; D’Imporzano Giuliana; Minetti Carlo; Scotti Sergio; Adani Fabrizio

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "digester gases 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

Digestion Simulations  

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

Digestion Simulations Digestion Simulations Name: Lisa Location: N/A Country: N/A Date: N/A Question: My 5th grade students are beginning an experiment next week and their hypothesis involves edibility(edibleness?). Is there a way to replicate the stomach in, say, a bottle?? Are there ways to test for edibleness(?) without actually ingesting the experiment yourself? Replies: I would not recommend the idea of a bottle stomach. The stomach digests only proteins anyway with HCl [pH 1.0] which is very, very strong acid that will burn seriously if in contact with skin. The intestine is just as much responsible for digestion of lipids [bile], carbohydrates and remaining proteins using enzymes, many of these you do not want to be handling, let alone purchase. As a high school teacher, I have lab exercises dealing with digestion, but I can not recommend any of these unless you are set up with a functional science laboratory and all the safety equipment necessary.

42

Optimization Online - Digest Archive  

E-Print Network [OSTI]

Optimization Online Digest Archive. Subscribe to the digest. ... Online is supported by the Mathematical Optmization Society. Mathematical Optimization Society.

43

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....

44

Contribution of Anaerobic Digesters to Emissions Mitigation and Electricity Generation Under U.S. Climate Policy  

E-Print Network [OSTI]

Livestock husbandry in the U.S. significantly contributes to many environmental problems, including the release of methane, a potent greenhouse gas (GHG). Anaerobic digesters (ADs) break down organic wastes using bacteria ...

Zaks, David P. M.

45

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

46

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

47

Digestion time  

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

Digestion time Digestion time Name: Don Mancosh Location: N/A Country: N/A Date: N/A Question: I have always given the rule of thumb in class that material we eat is with us for about 24 hours before exiting the body. The question arises about the time value of liquids. Getting a big coke prior to a 3 hour drive generally means that there will be a stop along the way. Is there a generalization made about liquids in the body similar to the one for solid food? Replies: A physician would give a better answer, but I hazard this: the only liquids which people consume (deliberately) in significant quantities are water, ethyl alcohol and various oils. Water and alcohol are absorbed on a time scale of seconds to minutes through the mouth, stomach and digestive tract. The oils are huge molecules, so I'd guess like any other greasy food they get absorbed in the upper digestive tract. Some of them, perhaps the longest and most nonpolar, are not absorbed at all --- cf. the old-time remedy of mineral oil for constipation --- so there should be some average time-before-what's-left-is-excreted such as you're looking for, and my (wild) guess is that it would not differ substantially from that for food. You can define an average lifetime in the body for alcohol, since the natural level is zero. Rough guidelines are widespread in the context of drunk driving laws. But this is not really possible for water. One's body is normally full up to the brim with water, and there's no way for the body to distinguish between water molecules recently absorbed and molecules that've been moping around since the Beatles split up. Thus the water entering the toilet bowl after the pit stop is not in general the same water as was in the big coke. If you were to consider for water just the average time between drinking and peeing, it would seem to depend strongly on how well hydrated the body was before the drink, and how much was drunk. During sustained heavy exertion in the sun and dry air one can easily drink a pint of water an hour without peeing at all. On the other hand, if one is willing to drink enough water fast enough, so as to establish a high excess of body water one can pee 8 ounces 15 minutes or less after drinking 8 ounces.

48

Proceedings of the international coalbed methane symposium. Volume 2  

SciTech Connect (OSTI)

Volume 2 contains 36 papers divided among the following sessions: Resources/development potential; Mine safety and productivity issues; Reservoir characterization, modeling, and well testing; and a Poster session whose papers discuss coal geology, well completion methods, origin of coalbed methane, rock mechanics of coal seams, geologic fractures in coal seams, and the use of coalbed methane for mitigation of greenhouse gases. All papers have been processed for inclusion on the data base.

NONE

1993-09-01T23:59:59.000Z

49

Cretaceous Cold-Seep Communities and Methane-Derived Carbonates in the Canadian Arctic  

Science Journals Connector (OSTI)

...CLAYPOOL, G.E., NATURAL GASES MARINE 99 ( 1974 ). COMMEAU...CARBON-ISOTOPE COMPOSITIONS OF NATURAL METHANES, AAPG BULLETIN-AMERICAN...HOVLAND, M, NORTH-SEA GAS FEEDS THE NORTH-SEA...SMOKER CHIMNEY FRAGMENTS IN CYPRUS SULFIDE DEPOSITS, NATURE...

BENOIT BEAUCHAMP; J. CHRISTOPHER HARRISON; WALTER W. NASSICHUK; H. ROY KROUSE; LESLIE S. ELIUK

1989-04-07T23:59:59.000Z

50

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

51

Optimization Online - Digest  

E-Print Network [OSTI]

Complete the form below to subscribe to the free Optimization Online Digest. ... Type your e-mail address to unsubscribe from the Optimization Online Digest.

52

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

53

Coalbed methane resource potential of the Piceance Basin, northwestern Colorado  

SciTech Connect (OSTI)

As predicted, from an evolving coalbed methane producibility model, prolific coalbed methane production is precluded in the Piceance Basin by the absence of coal bed reservoir continuity and dynamic ground-water flow. The best potential for production may lie at the transition zone from hydropressure to hydrocarbon overpressure and/or in conventional traps basinward of where outcrop and subsurface coals are in good reservoir and hydraulic communication. Geologic and hydrologic synergy among tectonic and structural setting, depositional systems and coal distribution, coal rank, gas content, permeability and hydrodynamics are the controls that determine the coalbed methane resource potential of the Piceance Basin. Within the coal-bearing Upper Cretaceous Williams Fork Formation, the prime coalbed methane target, reservoir heterogeneity and thrust faults cause coal beds along the Grand Hogback and in the subsurface to be in modest to poor reservoir and hydraulic communication, restricting meteoric ground water recharge and basinward flow. Total subsurface coalbed methane resources are still estimated to be approximately 99 Tcf (3.09 Tm{sup 3}), although coalbed methane resource estimates range between 80 (2.49 Tm{sup 3}) and 136 Tcf (4.24 Tm{sup 3}), depending on the calculation method used. To explore for high gas contents or fully gas-saturated coals and consequent high productivity in the Piceance Basin, improved geologic and completion technologies including exploration and development for migrated conventionally and hydrodynamically trapped gases, in-situ generated secondary biogenic gases, and solution gases will be required.

Tyler, R.; Scott, A.R.; Kaiser, W.R. [Univ. of Texas, Austin, TX (United States)

1996-06-01T23:59:59.000Z

54

Atmospheric Methane at Cape Meares, Oregon, U.S.A.: A High-Resolution Data  

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

Atmospheric Trace Gases Ā» Methane Ā» Atmospheric Trace Gases Ā» Methane Ā» Atmospheric Methane, Cape Meares Atmospheric Methane at Cape Meares, Oregon, U.S.A.: A High-Resolution Data Base for the Period 1979-1992 DOI: 10.3334/CDIAC/atg.db1007 data Data (DB1007) Investigators M. A. K. Khalil and R. A. Rasmussen Description This data base presents continuous automated atmospheric methane (CH4) measurements taken at the atmospheric monitoring facility in Cape Meares, Oregon, by the Oregon Graduate Institute of Science and Technology. The Cape Meares data represent some 119,000 individual atmospheric methane measurements carried out during 1979-1992. Analysis of ambient air (collected 12 to 72 times daily) was carried out by means of an automated sampling and measurement system, using the method of gas chromatography and

55

Greenhouse Gas Emission Reductions from Domestic Anaerobic Digesters Linked with Sustainable Sanitation in Rural China  

Science Journals Connector (OSTI)

Greenhouse Gas Emission Reductions from Domestic Anaerobic Digesters Linked with Sustainable Sanitation in Rural China ... (3) A key technology that may permit a switch from solid fuels to cleaner gaseous fuels in rural China is anaerobic digestion, where organic human and animal wastes are digested under anaerobic conditions generating biogas, composed primarily of methane (CH4), which can be sequestered and burned for cooking, heating, and lighting. ...

Radhika Dhingra; Erick R. Christensen; Yang Liu; Bo Zhong; Chang-Fu Wu; Michael G. Yost; Justin V. Remais

2011-02-24T23:59:59.000Z

56

Anaerobic Co-Digestion on Dairies in Washington State  

E-Print Network [OSTI]

as food-processing wastes) to increase biogas productivity, improve digester performance, and increase in manure and other feedstock to methane-rich biogas, a source of renewable energy (US-EPA 2006) (Figure 1-EPA 2005; US-EPA 2008). In addition to biogas, AD generates fiber and Figure 1. Overview of anaerobic

Collins, Gary S.

57

Halophytic microalgae as a feedstock for anaerobic digestion  

Science Journals Connector (OSTI)

Abstract Anaerobic digestion can be employed to produce methane biogas from residual microalgae biomass derived from either a lipid based biofuel process or wastewater treatment. There is interest in using halophytic microalgae for biofuel production due to their potential robustness in large-scale open pond production. The anaerobic digestion of halophytic microalgae biomass would however be challenging due to the high salinities not typically experienced in anaerobic digestion scenarios. Halophytic microalgae biomass as a potential substrate feedstock for anaerobic digestion would have salinities in excess of 3.5%, which is typically found in marine environments. To investigate the anaerobic digestion of halophytic microalgae issue the first stage of the reported study focuses on the changes undertaken in the bacterial community associated with the anaerobic digestion of piggery effluent under increasing saline conditions, with the aim of establishing a saline tolerant anaerobic digestion inoculum capable of digesting feedstocks under high salinity conditions. Favourable results from this inoculum development study allowed the investigation of anaerobic digestion of halophytic microalgae. The reported results demonstrate that a saline tolerant inoculum was maintained. Subsequent denaturing gradient gel electrophoresis (DGGE) fingerprinting of the resulting halophytic bacterial community showed several halophytic methanogens. The inoculum was used to digest the halophytic microalgae. The resulting gas data showed that biogas production of 358 ± 53 mL/g of volatile solids (VS) with a methane content of 54 ± 4.3% methane was achieved at 7% salinity. The volume of biogas produced on a wet weight microalgae biomass basis was 122 ± 26 and 175 ± 25 mL/g of halophytic microalgae biomass respectively (74 ± 2.8 wt.% moisture content). The conversion of carbon in the feedstock to methane achieved an efficiency of 26.4% and 46.6% at 3.4% and 7% salinity respectively. A halo-tolerant anaerobic digestion microbial community could be further optimized to complete the loop with nutrient recycle required with the production of halophytic microalgae based biofuels and potentially, hypersaline wastewater treatment applications.

Andrew Ward; Andy Ball; David Lewis

2015-01-01T23:59:59.000Z

58

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

59

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

60

ESTABoues, a decision tool to assess greenhouse gases of sewage sludge treatment and di  

E-Print Network [OSTI]

digestion, aerobic digestion, dewatering, al composting, drying) and sludge disposal route (land applicationORBIT2012 G ESTABoues, a decision tool to assess greenhouse gases of sewage sludge treatment and di-laure.reverdy@irstea.fr EXECUTIVE SUMMARY Sewage sludge production increases continuously reaching almost 20% (946 700 t 1 118 795

Paris-Sud XI, UniversitƩ de

Note: This page contains sample records for the topic "digester gases 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

Waste-to-wheel analysis of anaerobic-digestion-based renewable natural gas pathways with the GREET model.  

SciTech Connect (OSTI)

In 2009, manure management accounted for 2,356 Gg or 107 billion standard cubic ft of methane (CH{sub 4}) emissions in the United States, equivalent to 0.5% of U.S. natural gas (NG) consumption. Owing to the high global warming potential of methane, capturing and utilizing this methane source could reduce greenhouse gas (GHG) emissions. The extent of that reduction depends on several factors - most notably, how much of this manure-based methane can be captured, how much GHG is produced in the course of converting it to vehicular fuel, and how much GHG was produced by the fossil fuel it might displace. A life-cycle analysis was conducted to quantify these factors and, in so doing, assess the impact of converting methane from animal manure into renewable NG (RNG) and utilizing the gas in vehicles. Several manure-based RNG pathways were characterized in the GREET (Greenhouse gases, Regulated Emissions, and Energy use in Transportation) model, and their fuel-cycle energy use and GHG emissions were compared to petroleum-based pathways as well as to conventional fossil NG pathways. Results show that despite increased total energy use, both fossil fuel use and GHG emissions decline for most RNG pathways as compared with fossil NG and petroleum. However, GHG emissions for RNG pathways are highly dependent on the specifics of the reference case, as well as on the process energy emissions and methane conversion factors assumed for the RNG pathways. The most critical factors are the share of flared controllable CH{sub 4} and the quantity of CH{sub 4} lost during NG extraction in the reference case, the magnitude of N{sub 2}O lost in the anaerobic digestion (AD) process and in AD residue, and the amount of carbon sequestered in AD residue. In many cases, data for these parameters are limited and uncertain. Therefore, more research is needed to gain a better understanding of the range and magnitude of environmental benefits from converting animal manure to RNG via AD.

Han, J.; Mintz, M.; Wang, M. (Energy Systems)

2011-12-14T23:59:59.000Z

62

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

63

Formation mechanism for polycyclic aromatic hydrocarbons in methane flames  

E-Print Network [OSTI]

aromatic hydrocarbons PAHs up to 788 amu (C64H20) were detected in the combustion gases. Only the most applications including heating systems and gas turbines for electric power generation.62Ā­64 The combustionFormation mechanism for polycyclic aromatic hydrocarbons in methane flames K. Siegmanna) Swiss

Sattler, Klaus

64

Carbon Dioxide Reforming of Methane to Syngas by Thermal Plasma  

Science Journals Connector (OSTI)

Experiments were conducted on syngas preparation from dry reforming of methane by carbon dioxide with a DC arc plasma at atmospheric pressure. In all experiments, nitrogen gas was used as the working gas for thermal plasma to generate a high-temperature jet into a horizontal tube reactor. A mixture of methane and carbon dioxide was fed vertically into the jet. In order to obtain a higher conversion rate of methane and carbon dioxide, chemical energy efficiency and fuel production efficiency, parametric screening studies were conducted, in which the volume ratio of carbon dioxide to methane in fed gases and the total flux of fed gases were taken into account. Results showed that carbon dioxide reforming of methane to syngas by thermal plasma exhibited a larger processing capacity, higher conversion of methane and carbon dioxide and higher chemical energy efficiency and fuel production efficiency. In addition, thermodynamic simulation for the reforming process was conducted. Experimental data agreed well with the thermodynamic results, indicating that high thermal efficiency can be achieved with the thermal plasma reforming process.

Sun Yanpeng (???); Nie Yong (??); Wu Angshan (???); Ji Dengxiang (???); Yu Fengwen (???); Ji Jianbing (???)

2012-01-01T23:59:59.000Z

65

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

66

Experimental co-digestion of corn stalk and vermicompost to improve biogas production  

SciTech Connect (OSTI)

Anaerobic co-digestion of corn stalk and vermicompost (VC) as well as mono-digestion of corn stalk were investigated. Batch mono-digestion experiments were performed at 35 {+-} 1 {sup o}C and initial total solid loading (TSL) ranged from 1.2% to 6.0%. Batch co-digestion experiments were performed at 35 {+-} 1 {sup o}C and initial TSL of 6% with VC proportions ranged from 20% to 80% of total solid (TS). For mono-digestion of corn stalk, a maximum methane yield of 217.60 {+-} 13.87 mL/g TS{sub added} was obtained at initial TSL of 4.8%, and acidification was found at initial TSL of 6.0% with the lowest pH value of 5.10 on day 4. Co-digestion improved the methane yields by 4.42-58.61% via enhancing volatile fatty acids (VFAs) concentration and pH value compared with mono-digestion of corn stalk. The maximum biogas yield of 410.30 {+-} 11.01 mL/g TS{sub added} and methane yield of 259.35 {+-} 13.85 mL/g TS{sub added} were obtained for 40% VC addition. Structure analysis by X-ray diffractometry (XRD) showed that the lowest crystallinity of 35.04 of digested corn stalk was obtained from co-digestion with 40% VC, which decreased 29.4% compared to 49.6 obtained from un-treated corn stalk. It is concluded that co-digestion with VC is beneficial for improving biodigestibility and methane yield from corn stalk.

Chen Guangyin [State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093 (China); Zheng Zheng, E-mail: zzhenghj@fudan.edu.c [State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093 (China); Department of Environmental Science and Engineering, Fudan University, Shanghai 200433 (China); Yang Shiguan [National Engineering Laboratory of Biomass Power Generation Equipment, School of Renewable Energy, North China Electric Power University, Beijing 102206 (China); Fang Caixia; Zou Xingxing; Luo Yan [State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093 (China)

2010-10-15T23:59:59.000Z

67

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

68

Market Digest: Natural Gas  

Reports and Publications (EIA)

The Energy Information Administration's Natural Gas Market Digest provides information and analyses on all aspects of natural gas markets.

2014-01-01T23:59:59.000Z

69

Anaerobic digestion of glycerol and co-digestion of glycerol and pig manure  

Science Journals Connector (OSTI)

The potential of glycerol obtained from transesterification of waste cooking oil as a main carbon source for biogas production was investigated. The glycerol was highly contaminated with oils and fats and was pretreated with sulfuric acid. Using a carbon source of glucose as a control, we compared biogas production from the acid-treated glycerol in a synthetic medium and the acid-treated glycerol mixed with pig manure. The anaerobic digestion of acid-treated glycerol with supplement in a synthetic medium was found to be satisfactory at organic loading rates (OLR) between 1.3, 1.6 and 2.6 g chemical oxygen demand (COD) L?1 d?1. The maximum methane yield of 0.32 L at Standard temperature and pressure (STP) g?1 COD removal was achieved at an OLR of 1.6 g COD L?1 d?1 and the methane content was 54% on an average. At a higher organic loading rate of 5.4 g COD L?1 d?1, the propionic acid to acetic acid ratio was higher than the critical threshold limit for metabolic imbalance. Anaerobic digestion of acid-treated glycerol with pig manure was also investigated at the COD ratio of 80:20 (glycerol:pig manure). The anaerobic digestion of acid-treated glycerol with pig manure was found to be satisfactory at organic loading rates between 1.3, 1.7, 2.9 and 5.0 g COD L?1 d?1 in terms of COD reduction (>80%) and methane content of (62% on an average). However, the biogas production rate was found to significantly decrease at the highest load. The maximum methane yield of 0.24 L STP g?1 COD removal was achieved at an OLR of 1.3 g COD L?1 d?1.

Sasikarn Nuchdang; Chantaraporn Phalakornkule

2012-01-01T23:59:59.000Z

70

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

71

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...

72

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...

73

Biological Removal of Siloxanes from Landfill and Digester Gases  

E-Print Network [OSTI]

volatilize from waste at landfills and wastewater treatment plants (1). As a result, biogas produced, as well as an increase in maintenance costs (6, 7). The presence of VMSs in biogas is thus a challenge recommended by most equipment manufacturers for un- hindered use (6). Of all VMSs in biogas

74

Asia-wide emissions of greenhouse gases  

SciTech Connect (OSTI)

Emissions of principal greenhouse gases (GHGs) from Asia are increasing faster than those from any other continent. This is a result of rapid economic growth, as well as the fact that almost half of the world`s population lives in Asian countries. In this paper, the author provides estimates of emissions of the two principal greenhouse gases, carbon dioxide (CO{sub 2}) and methane (CH{sub 4}), from individual countries and areas. Recent literature has been reviewed for emission estimates for individual sources, such as carbon dioxide from cement manufacture, and methane from rice fields. There are very large uncertainties in many of these estimates, so several estimates are provided, where available. The largest anthropogenic source of CO{sub 2} emissions is the use of fossil fuels. Energy consumption data from 1992 have been used to calculate estimated emissions of CO{sub 2} from this source. In view of the ongoing negotiations to limit future greenhouse gas emissions, estimates of projected CO{sub 2} emissions from the developing countries of Asia are also provided. These are likely to be 3 times their 1986 levels by 2010, under business as usual scenarios. Even with the implementation of energy efficiency measures and fuel switching where feasible, the emissions of CO{sub 2} are likely to double within the same time period.

Siddiqi, T.A. [East-West Center, Honolulu, HI (United States). Program on Environment

1995-11-01T23:59:59.000Z

75

Design of experiments to assess pre-treatment and co-digestion strategies that optimize biogas production from macroalgae Gracilaria vermiculophylla  

Science Journals Connector (OSTI)

Abstract A design of experiments was applied to evaluate different strategies to enhance the methane yield of macroalgae Gracilaria vermiculophylla. Biochemical Methane Potential (BMP) of G. vermiculophylla after physical pre-treatment (washing and maceration) reached 481 ± 9 L CH4 kg?1 VS, corresponding to a methane yield of 79 ± 2%. No significant effects were achieved in the BMP after thermochemical pre-treatment, although the seaweeds solubilisation increased up to 44%. Co-digestion with glycerol or sewage sludge has proved to be effective for increasing the methane production. Addition of 2% glycerol (w:w) increased the BMP by 18%, achieving almost complete methanation of the substrate (96 ± 3%). Co-digestion of seaweed and secondary sludge (15:85%, TS/TS) increased the BMP by 25% (605 ± 4 L CH4 kg?1 VS) compared to the seaweed individual digestion.

J.V. Oliveira; M.M. Alves; J.C. Costa

2014-01-01T23:59:59.000Z

76

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

77

Raman Spectra of Polyatomic Gases  

Science Journals Connector (OSTI)

Raman spectra of gaseous CO2, N2O, NH3, CH4 and C2H4 have been photographed using the line ?2536 of mercury as the exciting radiation. Vibrational transitions have been observed in all the gases investigated, and rotational transitions in the cases of NH3 and CH4. For the frequency shifts due to the vibrational transitions, the following numerical values (in cm-1) have been found: CO2: 1264.5; 1285.1; 1387.7; 1408.4.CH4: 2914.8; 3022.1; 3071.5.N2O: 1281.8C2H4: 1342.4; 1623.3; 2880.1; 3019.3; 3240.3; 3272.3.NH3: 3333.6  Raman spectra of liquid NH3 have been photographed and found to give the two frequency shifts: 3298.4 and 3214.5. In the case of gaseous NH3, pure rotational transitions lead to a moment of inertia having the value I0=2.79×10-40. In the case of methane, the positive and negative branches of the 3022.1 band lead to the value I0=5.17×10-40. The relations between these data and infra-red absorption data are discussed.

R. G. Dickinson, R. T. Dillon, and F. Rasetti

1929-08-15T23:59:59.000Z

78

MARINE BIOMASS SYSTEM: ANAEROBIC DIGESTION AND PRODUCTION OF METHANE  

E-Print Network [OSTI]

distribution of heavy metals and other toxicants betweenaccumulation and toxicity resulting from heavy metals suchthe marine algae. Toxicity resulting from heavy metal uptake

Haven, Kendall F.

2011-01-01T23:59:59.000Z

79

MARINE BIOMASS SYSTEM: ANAEROBIC DIGESTION AND PRODUCTION OF METHANE  

E-Print Network [OSTI]

time constant algal heat of combustion (6 Kcal/gm) dilutionSource: temperature, heat of combustion, and the depth at

Haven, Kendall F.

2011-01-01T23:59:59.000Z

80

MARINE BIOMASS SYSTEM: ANAEROBIC DIGESTION AND PRODUCTION OF METHANE  

E-Print Network [OSTI]

flow from an on-site steam turbine to raise the kelp to 45°Ca 1200 Kw electric steam turbine/generator system. CapitalFinally, the waste steam stream from the turbine is used to

Haven, Kendall F.

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "digester gases 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

MARINE BIOMASS SYSTEM: ANAEROBIC DIGESTION AND PRODUCTION OF METHANE  

E-Print Network [OSTI]

fuel for the boiler is sludge which is The potential residuals derived from the pressing of shredded algae.

Haven, Kendall F.

2011-01-01T23:59:59.000Z

82

MARINE BIOMASS SYSTEM: ANAEROBIC DIGESTION AND PRODUCTION OF METHANE  

E-Print Network [OSTI]

Design Parameters Marine Biomass Production Sea Farmof Various Types of Biomass . Biomethanation Parameters.Proceedings, Fuels from Biomass Symposium. University of

Haven, Kendall F.

2011-01-01T23:59:59.000Z

83

MARINE BIOMASS SYSTEM: ANAEROBIC DIGESTION AND PRODUCTION OF METHANE  

E-Print Network [OSTI]

commercial farm. A biomass energy farm must cover a largeof Symposium on Energy from Biomass and Wastes, Washington,Biomass Yield Energy Content Upwelling

Haven, Kendall F.

2011-01-01T23:59:59.000Z

84

MARINE BIOMASS SYSTEM: ANAEROBIC DIGESTION AND PRODUCTION OF METHANE  

E-Print Network [OSTI]

wind, and bottom conditions that repre- sent a potential large farm site, but do not reach the extremes

Haven, Kendall F.

2011-01-01T23:59:59.000Z

85

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."

86

Solubility of methane in water under natural conditions: a laboratory study. Final report, April 1, 1978-June 30, 1982  

SciTech Connect (OSTI)

The solubility of methane in aqueous solutions has been determined over a broad range of temperature, pressure and salinities. The effect of dissolved carbon dioxide and ethane on methane solubility has been determined at 302{sup 0}F. Also the solubility of crude oil and water in methane has been determined over a broad range of temperatures and pressures. The solubility of methane is raised by increasing pressure and temperature (above about 170{sup 0}F). There is a solubility minimum near 170{sup 0}F at constant pressure and salinity. Ionic salts effectively salt methane out of solution at all concentrations investigated. The effect of the addition of small amounts of carbon dioxide or ethane to the gas dissolved in aqueous solutions is to enhance methane solubility compared to solutions without other gases. Higher concentrations of dissolved gases, depending upon the salinity and the gas involved, decrease aqueous methane solubility. The addition of carbon dioxide always increased total gas content even when reducing the concentration of methane. With increasing concentration of ethane in the dissolved gases the total gas content reaches a maximum and then both methane and total gas content decrease. Comparison of experimental methane solubilities with gas/water ratios, salinities, bottom hole temperatures and pressures of geopressure test wells suggests that some formation fluids may be near saturation, while many others seem to be undersaturated. Petroleum is soluble in methane. Increasing pressure increases the solubility of crude oil in methane gas. At an elevated pressure, which depends upon the temperature, oil and gas form a single fluid phase.

Blount, C.W.; Price, L.C.

1982-06-01T23:59:59.000Z

87

Strongly interacting Fermi gases  

E-Print Network [OSTI]

Strongly interacting gases of ultracold fermions have become an amazingly rich test-bed for many-body theories of fermionic matter. Here we present our recent experiments on these systems. Firstly, we discuss high-precision ...

Bakr, W.

88

EIA-Voluntary Reporting of Greenhouse Gases Program - Greenhouse Gases and  

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

Greenhouse Gases and Global Warming Potentials (GWP) Greenhouse Gases and Global Warming Potentials (GWP) Voluntary Reporting of Greenhouse Gases Program Greenhouse Gases and Global Warming Potentials (GWP) (From Appendix E of the instructions to Form EIA-1605) GREENHOUSE GAS NAME GREENHOUSE GAS CODE FORMULA GWP TAR1 AR42 (1) Carbon Dioxide CO2 CO2 1 1 (2) Methane CH4 CH4 23 25 (3) Nitrous Oxide N2O N2O 296 298 (4) Hydroflourocarbons HFC-23 (trifluoromethane) 15 CHF3 12000 14800 HFC-32 (difluoromethane) 16 CH2F2 550 675 HFC-41 (monofluoromethane) 43 CH3F 97 -3 HFC-125 (pentafluoroethane) 17 CHF2CF3 3400 3500 HFC-134 (1,1,2,2-tetrafluoroethane) 44 CHF2CHF2 1100 -3 HFC-134a (1,1,1,2-tetrafluoroethane) 18 CH2FCF3 1300 1430 HFC-143 (1,1,2-trifluorethane) 45 CHF2CH2F 330 -3 HFC-143a (1,1,1-trifluoroethane) 46 CF3CH3 4300 4470 HFC-152 (1,2-difluorethane) 47 CH2FCH2F

89

Methane, Nonmethane Hydrocarbons, Alkyl Nitrates, and Chlorinated Carbon  

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

Atmospheric Trace Gases in Whole-Air Samples Atmospheric Trace Gases in Whole-Air Samples Methane, Nonmethane Hydrocarbons, Alkyl Nitrates, and Chlorinated Carbon Compounds including 3 Chlorofluorocarbons (CFC-11, CFC-12, and CFC-113) in Whole-air Samples graphics Graphics data Data Investigator Donald Blake Department of Chemistry, University of California Irvine, California, 92697 USA Period of Record April 1979 - December 2012 Methods Whole-air samples are collected in conditioned, evacuated, 2-L stainless steel canisters; each canister is filled to ambient pressure over a period of about 1 minute (approximately 20 seconds to 2 minutes). These canisters are returned to the University of California at Irvine for chromatographic analysis. Analysis for methane includes gas chromatography with flame ionization, as

90

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

91

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

92

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

93

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

94

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

95

Baltimore Zoo digester project. Final report. [Elephants  

SciTech Connect (OSTI)

The results of a project to produce methane using the manure from zoo animals as a feedstock is presented. Two digesters are in operation, the first (built in 1974) utilizing wastes from the Hippo House and a second (built in 1980) utilizing wastes from the Elephant House. Demonstrations on the utilization of the gas were performed during zoo exhibits. The Elephant House Digester has a capacity of 4200 gallons and a floating gas dome which can retain at least 150 cu ft of gas. Solar energy has been incorporated into the design to maintain digester temperature at 95/sup 0/F. The system produces 50 cu ft per day. After cleaning the gas, it is used to generate electricity to power an electric light, a roof fan, and an air conditioner. The gas is also used to operate a gas range and a gas lamp. During the opening day exhibit, 50 meals were cooked using the bio-gas from just 2 elephants. (DMC)

Gibson, P.W.

1980-01-01T23:59:59.000Z

96

Exploration strategies based on a coalbed methane producibility model  

SciTech Connect (OSTI)

Knowing geologic and hydrologic characteristics of a basin does not necessarily lead to a determination of its coalbed methane producibility because it is the synergy among key hydrogeologic controls that governs producibility. Detailed studies performed in the San Juan, Piceance, and Sand Wash Basins determined that the key hydrogeologic factors affecting producibility include depositional setting and coal distribution, tectonic and structural setting, coal rank and gas generation, hydrodynamics, permeability, and gas content. The conceptual model based on these factors provides a rationale for exploration and development strategies for unexplored areas or in basins having established or limited production. Exceptionally high productivity requires good permeability; thick, laterally continuous high-rank and high-gas-content coals; dynamic flow of ground water through those coals; generation of secondary biogenic gases; and migration and conventional trapping of thermogenic and biogenic gases. Higher coalbed methane producibility commonly occurs in areas of upward flow associated with permeability barriers (no-flow boundaries). Fluid migration across a large gathering area orthogonal to permeability barriers and/or in situ generation of secondary biogenic gases concentrate the coal gas, resulting in higher gas contents. Low coalbed methane production is typically associated with very low permeability systems; the absence of conventional or hydrodynamic traps; and thin, low-rank coals below the threshold of thermogenic gas generation. Production from relatively low-gas-content coals in highly permeable recharge areas may result in excessive water and limited coalbed methane production. Thus, high permeability can be as detrimental to coalbed methane producibility as is low permeability.

Scott, A.R.; Kaiser, W.R.; Hamilton, D.S.; Tyler, R.; Finley, R.J. [Univ. of Texas, Austin, TX (United States)

1996-12-31T23:59:59.000Z

97

Exploration strategies based on a coalbed methane producibility model  

SciTech Connect (OSTI)

Knowing geologic and hydrologic characteristics of a basin does not necessarily lead to a determination of its coalbed methane producibility because it is the synergy among key hydrogeologic controls that governs producibility. Detailed studies performed in the San Juan, Piceance, and Sand Wash Basins determined that the key hydrogeologic factors affecting producibility include depositional setting and coal distribution, tectonic and structural setting, coal rank and gas generation, hydrodynamics, permeability, and gas content. The conceptual model based on these factors provides a rationale for exploration and development strategies for unexplored areas or in basins having established or limited production. Exceptionally high productivity requires good permeability; thick, laterally continuous high-rank and high-gas-content coals; dynamic flow of ground water through those coals; generation of secondary biogenic gases; and migration and conventional trapping of thermogenic and biogenic gases. Higher coalbed methane producibility commonly occurs in areas of upward flow associated with permeability barriers (no-flow boundaries). Fluid migration across a large gathering area orthogonal to permeability barriers and/or in situ generation of secondary biogenic gases concentrate the coal gas, resulting in higher gas contents. Low coalbed methane production is typically associated with very low permeability systems; the absence of conventional or hydrodynamic traps; and thin, low-rank coals below the threshold of thermogenic gas generation. Production from relatively low-gas-content coals in highly permeable recharge areas may result in excessive water and limited coalbed methane production. Thus, high permeability can be as detrimental to coalbed methane producibility as is low permeability.

Scott, A.R.; Kaiser, W.R.; Hamilton, D.S.; Tyler, R.; Finley, R.J. (Univ. of Texas, Austin, TX (United States))

1996-01-01T23:59:59.000Z

98

Solubility of water in compressed nitrogen, argon, and methane  

Science Journals Connector (OSTI)

Solubility of water in compressed nitrogen, argon, and methane ... The accurate determination of water content in hydrocarbons is critical for the petroleum and natural gas industries due to corrosion and ... ... Predicting the Phase Equilibria, Critical Phenomena, and Mixing Enthalpies of Binary Aqueous Systems Containing Alkanes, Cycloalkanes, Aromatics, Alkenes, and Gases (N2, CO2, H2S, H2) with the PPR78 Equation of State ...

Maurice Rigby; John M. Prausnitz

1968-01-01T23:59:59.000Z

99

Timelines for mitigating methane emissions from energy technologies  

E-Print Network [OSTI]

Energy technologies emitting differing proportions of methane and carbon dioxide vary in their relative climate impacts over time, due to the different atmospheric lifetimes of the two gases. Standard technology comparisons using the global warming potential (GWP) emissions equivalency metric do not reveal these dynamic impacts, and may not provide the information needed to assess technologies and emissions mitigation opportunities in the context of broader climate policy goals. Here we formulate a portfolio optimization model that incorporates changes in technology impacts as a radiative forcing (RF) stabilization target is approached. An optimal portfolio, maximizing allowed energy consumption while meeting the RF target, is obtained by year-wise minimization of the marginal RF impact in an intended stabilization year. The optimal portfolio calls for using certain higher methane-emitting technologies prior to an optimal switching year, followed by methane-light technologies as the stabilization year approac...

Roy, Mandira; Trancik, Jessika E

2015-01-01T23:59:59.000Z

100

Emissions of greenhouse gases in the United States 1997  

SciTech Connect (OSTI)

This is the sixth annual report on aggregate US national emissions of greenhouse gases. It covers emissions over the period 1990--1996, with preliminary estimates of emissions for 1997. Chapter one summarizes some background information about global climate change and the greenhouse effect. Important recent developments in global climate change activities are discussed, especially the third Conference of the Parties to the Framework Convention on Climate Change, which was held in December of 1997 in Kyoto, Japan. Chapters two through five cover emissions of carbon dioxide, methane, nitrous oxide, halocarbons and related gases, respectively. Chapter six describes potential sequestration and emissions of greenhouse gases as a result of land use changes. Six appendices are included in the report. 96 refs., 38 tabs.

NONE

1998-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "digester gases 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

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.

102

Bio-methane via fast pyrolysis of biomass  

Science Journals Connector (OSTI)

Bio-methane, a renewable vehicle fuel, is today produced by anaerobic digestion and a 2nd generation production route via gasification is under development. This paper proposes a poly-generation plant that produces bio-methane, bio-char and heat via fast pyrolysis of biomass. The energy and material flows for the fuel synthesis are calculated by process simulation in Aspen Plus®. The production of bio-methane and bio-char amounts to 15.5 MW and 3.7 MW, when the total inputs are 23 MW raw biomass and 1.39 MW electricity respectively (HHV basis). The results indicate an overall efficiency of 84% including high-temperature heat and the biomass to bio-methane yield amounts to 83% after allocation of the biomass input to the final products (HHV basis). The overall energy efficiency is higher for the suggested plant than for the gasification production route and is therefore a competitive route for bio-methane production.

Martin Görling; Mårten Larsson; Per Alvfors

2013-01-01T23:59:59.000Z

103

Atmospheric Trace Gases from the Carbon Dioxide Information Analysis Center (CDIAC)  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

CDIAC products are indexed and searchable through a customized interface powered by ORNL's Mercury search engine. Products include numeric data packages, publications, trend data, atlases, models, etc. and can be searched for by subject area, keywords, authors, product numbers, time periods, collection sites, spatial references, etc. Some of the collections may also be included in the CDIAC publication, Trends Online: A Compendium of Global Change Data. Most data sets, many with numerous data files, are free to download from CDIAC's ftp area. The collections under the CDIAC heading of Atmospheric Trace Gases include: Atmospheric Carbon Dioxide, Atmospheric Methane, Atmospheric Carbon Monoxide, Atmospheric Hydrogen, Isotopes in Greenhouse Gases, Radionuclides, Aerosols, and Other Trace Gases.

104

Turkey vs. human digestion  

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

Turkey vs. human digestion Turkey vs. human digestion Name: wallyb Location: N/A Country: N/A Date: N/A Question: How is the digestive system of turkeys different from that of humans? Replies: Hmmm.. been a while since I had sophomore biology, so I can't completely answer this one, but I can say a few things. One, since turkeys are birds, and birds as a general rule have not had teeth for several million years at least, the turkey needs a way to mash up its food -- thus, the crop, which is essentially like another stomach: the turkey (and many other birds, for that matter) swallows small stones which serve in lieu of teeth, mashing up food via muscular action in the crop, from whence the "chewed" food moves on into the rest of the digestive tract. As for any other differences, I'll have to leave that to someone else with more ornithological experience...

105

Steam Digest 2001  

SciTech Connect (OSTI)

Steam Digest 2001 chronicles BestPractices Program's contributions to the industrial trade press for 2001, and presents articles that cover technical, financial and managerial aspects of steam optimization.

Not Available

2002-01-01T23:59:59.000Z

106

Enhancement of sludge reduction and methane production by removing extracellular polymeric substances from waste activated sludge  

Science Journals Connector (OSTI)

Abstract The management of waste activated sludge (WAS) recycling is a concern that affects the development of the future low-carbon society, particularly sludge reduction and biomass utilization. In this study, we investigated the effect of removing extracellular polymeric substances (EPS), which play important roles in the adhesion and flocculation of WAS, on increased sludge disintegration, thereby enhancing sludge reduction and methane production by anaerobic digestion. EPS removal from WAS by ethylenediaminetetraacetic acid (EDTA) significantly enhanced sludge reduction, i.e., 49 ± 5% compared with 27 ± 1% of the control at the end the digestion process. Methane production was also improved in WAS without EPS by 8881 ± 109 CH4 ?mol g?1 dry-weight of sludge. Microbial activity was determined by denaturing gradient gel electrophoresis and real-time polymerase chain reaction, which showed that the hydrolysis and acetogenesis stages were enhanced by pretreatment with 2% EDTA, with a larger methanogenic community and better methane production.

Minh Tuan Nguyen; Nazlina Haiza Mohd Yasin; Toshiki Miyazaki; Toshinari Maeda

2014-01-01T23:59:59.000Z

107

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

108

Utilization of coal mine methane for methanol and SCP production. Topical report, May 5, 1995--March 4, 1996  

SciTech Connect (OSTI)

The feasibility of utilizing a biological process to reduce methane emissions from coal mines and to produce valuable single cell protein (SCP) and/or methanol as a product has been demonstrated. The quantities of coal mine methane from vent gas, gob wells, premining wells and abandoned mines have been determined in order to define the potential for utilizing mine gases as a resource. It is estimated that 300 MMCFD of methane is produced in the United States at a typical concentration of 0.2-0.6 percent in ventilation air. Of this total, almost 20 percent is produced from the four Jim Walter Resources (JWR) mines, which are located in very gassy coal seams. Worldwide vent gas production is estimated at 1 BCFD. Gob gas methane production in the U.S. is estimated to be 38 MMCFD. Very little gob gas is produced outside the U.S. In addition, it is estimated that abandoned mines may generate as much as 90 MMCFD of methane. In order to make a significant impact on coal mine methane emissions, technology which is able to utilize dilute vent gases as a resource must be developed. Purification of the methane from the vent gases would be very expensive and impractical. Therefore, the process application must be able to use a dilute methane stream. Biological conversion of this dilute methane (as well as the more concentrated gob gases) to produce single cell protein (SCP) and/or methanol has been demonstrated in the Bioengineering Resources, Inc. (BRI) laboratories. SCP is used as an animal feed supplement, which commands a high price, about $0.11 per pound.

NONE

1998-12-31T23:59:59.000Z

109

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

110

Combustion behavior of a spark ignition engine fueled with synthetic gases derived from biogas  

Science Journals Connector (OSTI)

Abstract Combustion results obtained from a spark ignition engine fueled with two synthetic gases obtained from catalytic decomposition of biogas are presented in this paper. These results are compared with those obtained when the engine was fueled with gasoline, methane and with the biogas from which synthetic gases are extracted. Experimental tests were performed under a wide range of speeds and at three equivalence ratios. Results showed that fractions of hydrogen in synthetic gases increased maximum pressures inside cylinder. Moreover, peak pressures were detected closer to top dead center than methane and biogas. Despite the fraction of diluents in the composition of synthetic gases, high speeds and lean conditions resulted in higher indicated efficiencies than those obtained with gasoline. Moreover, combustion speed and heat release rate were strongly influenced by the proportion of diluents and hydrogen in gaseous blends. CO and CO2 content in the composition of synthetic gases contributed to increase the exhaust concentrations of these pollutants compared with the other fuels, while HC decreased because of the small fraction of methane which remained unburned. Although \\{NOx\\} emissions were mitigated by diluents, like CO2 and air excess, high hydrogen fraction in composition of syngas involved elevated \\{NOx\\} emissions due to the increase in flame temperature that hydrogen produces.

J. Arroyo; F. Moreno; M. Muńoz; C. Monné; N. Bernal

2014-01-01T23:59:59.000Z

111

Reading Comprehension - Digestion and Nutrition  

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

Digestion and Nutrition Digestion and Nutrition 1. The pouchlike muscular organ that secretes acids and digestive enzymes is the _________ stomach esophagus intestines . 2. _________ saliva enzymes chime is the watery material that results form digestion in the stomach. 3. Iron, potassium, and iodine are _________ vitamins minerals amino acids . 4. The human body is about 60 percent _________ salt water nutrients . 5. The teeth break down food by _________ chemical digestion mechanical digestion . 6. _________ Teeth Your tongue Saliva in the mouth helps to chemically digest food. 7. _________ Mechanical digestion Chemical digestion takes place in the mouth, stomach, and small intestine with the help of chemicals called _________ amino acids vitamins enzymes . 8. Proteins are made up of smaller building blocks called _________

112

Comparison of different liquid anaerobic digestion effluents as inocula and nitrogen sources for solid-state batch anaerobic digestion of corn stover  

SciTech Connect (OSTI)

Highlights: Black-Right-Pointing-Pointer Compared methane production of solid AD inoculated with different effluents. Black-Right-Pointing-Pointer Food waste effluent (FWE) had the largest population of acetoclastic methanogens. Black-Right-Pointing-Pointer Solid AD inoculated with FWE produced the highest methane yield at F/E ratio of 4. Black-Right-Pointing-Pointer Dairy waste effluent (DWE) was rich of cellulolytic and xylanolytic bacteria. Black-Right-Pointing-Pointer Solid AD inoculated with DWE produced the highest methane yield at F/E ratio of 2. - Abstract: Effluents from three liquid anaerobic digesters, fed with municipal sewage sludge, food waste, or dairy waste, were evaluated as inocula and nitrogen sources for solid-state batch anaerobic digestion of corn stover in mesophilic reactors. Three feedstock-to-effluent (F/E) ratios (i.e., 2, 4, and 6) were tested for each effluent. At an F/E ratio of 2, the reactor inoculated by dairy waste effluent achieved the highest methane yield of 238.5 L/kgVS{sub feed}, while at an F/E ratio of 4, the reactor inoculated by food waste effluent achieved the highest methane yield of 199.6 L/kgVS{sub feed}. The microbial population and chemical composition of the three effluents were substantially different. Food waste effluent had the largest population of acetoclastic methanogens, while dairy waste effluent had the largest populations of cellulolytic and xylanolytic bacteria. Dairy waste also had the highest C/N ratio of 8.5 and the highest alkalinity of 19.3 g CaCO{sub 3}/kg. The performance of solid-state batch anaerobic digestion reactors was closely related to the microbial status in the liquid anaerobic digestion effluents.

Xu Fuqing; Shi Jian [Department of Food, Agricultural and Biological Engineering, Ohio State University, Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691 (United States); Lv Wen; Yu Zhongtang [Department of Animal Sciences, Ohio State University, Columbus, OH 43210 (United States); Li Yebo, E-mail: li.851@osu.edu [Department of Food, Agricultural and Biological Engineering, Ohio State University, Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691 (United States)

2013-01-15T23:59:59.000Z

113

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

114

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

115

Biomethane production by anaerobic digestion of organic waste  

Science Journals Connector (OSTI)

Abstract Anaerobic Digestion (AD) is a biological process that takes place naturally when bacteria break down organic matter in environments with or without oxygen. Controlled anaerobic digestion of organic waste in enclosed landfill will generate methane. Almost any organic material can be processed with AD, including waste paper and cardboard (of a grade that is too low to recycle because of food contamination), grass clippings, leftover food, industrial effluents, sewage and animal waste. AD produces biogas which is comprised of around 60% methane (CH4) and 40% carbon dioxide (CO2). This biogas can be used to generate heat or electricity and/or can be used as a vehicular fuel. If the intended use is for power generation the biogas must be scrubbed to remove a number of impurities. After conditioning the biogas can be used for onsite power generation, to heat homes or can be added to the national natural gas grid. In recent years several research groups have shown the possibility of upgrading the biogas for biomethane production [1]. This study will show the feasibility of integrating anaerobic digestion plant with onsite polymeric membrane purification system for conditioned biomethane production.

A. Molino; F. Nanna; Y. Ding; B. Bikson; G. Braccio

2013-01-01T23:59:59.000Z

116

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

117

Anxiety and Digestion  

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

Anxiety and Digestion Anxiety and Digestion Name: Donna Location: N/A Country: N/A Date: N/A Question: Explain how anxiety may be responsible for slowing down the process of digestion Replies: Your body really has 2 nervous systems. One is the peripheral nervous system that controls how you move and think etc. the other is called the autonomic (not automatic) nervous system It controls all of your everyday functions such as your heart, your blood vessel diameter and your digestive system, etc. There are 2 divisions of the ANS. One is called the parasympathetic and the other is the sympathetic. The parasympathetic is your everyday division, and is usually in control. When you come upon a stressful or dangerous situation, your sympathetic division takes over. It gets you ready to "fight or flee". Some parts of your body are put on alert. Your blood vessels constrict in some areas and dilate in others to get blood flowing to areas that will help you in a dangerous situation and to get glucose (fuel) to those areas quickly. Your heart starts to beat faster to send blood to those areas quicker, your pupils dilate. Other parts of your body are put on hold; those that aren't needed in a danger situation. Your digestive system is one that is put on hold. When you are under stress, your body doesn't know whether you are in danger or not but acts like it is. So if you are under constant stress, your digestive system is affected.

118

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

119

PalladianDigest Transportation  

E-Print Network [OSTI]

PalladianDigest CONNECT. EMPOWER. GROW. Tackling Transportation Challenges Nebraska has been a vital link in the nation's transportation system since the days when carts, wagons to University of NebraskaĀ­Lincoln research. That's fine with UNL transportation researchers, said Larry Rilett

Farritor, Shane

120

Biogenesis of tritiated and carbon-14 methane from low-level radioactive waste  

SciTech Connect (OSTI)

Methane bacteria were detected in leachate samples collected from commercial low-level radioactive waste disposal sites. Significant amounts of tritiated and carbon-14 methane were generated by a mixed methanogenic culture from a leachate sample collected from the low-level radioactive waste disposal site, Maxey Flats, KY. Tritiated methane was produced by methane bacteria from synthetic media containing 2 mCi of tritium as tritiated water or tritiated acetate, and the level of tritium added to the medium had no effect on methanogenesis. Under anaerobic conditions the organic compounds containing /sup 14/C and /sup 3/H activity and tritiated water in the waste are metabolized by microorganisms and they produce radioactive gases which escape into the environment from the disposal sites. 4 figures, 3 tables.

Francis, A.J.; Dobbs, S.; Doering, R.F.

1980-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "digester gases 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

Biogenesis of tritiated and carbon-14 methane from low-level radioactive waste  

Science Journals Connector (OSTI)

Methane bacteria were detected in leachate samples collected from commercial low-level radioactive waste disposal sites. Significant amounts of tritiated and carbon-14 methane were generated by a mixed methanogenic culture from a leachate sample collected from the low-level radioactive waste disposal site, Maxey Flats, KY. Tritiated methane was produced by methane bacteria from synthetic media containing 2 mCi of tritium as tritiated water or tritiated acetate, and the level of tritium added to the medium had no effect on methanogenesis. Under anaerobic conditions the organic compounds containing 14C and 3H activity and tritiated water in the waste are metabolized by microorganisms and they produce radioactive gases which escape into the environment from the disposal sites.

A.J Francis; S Dobbs; R.F Doering

1980-01-01T23:59:59.000Z

122

EIA - Emissions of Greenhouse Gases in the United States 2009  

Gasoline and Diesel Fuel Update (EIA)

Environment Environment Emissions of Greenhouse Gases in the U. S. Release Date: March 31, 2011 | Next Release Date: Report Discontinued | Report Number: DOE/EIA-0573(2009) This report-the eighteenth annual report-presents the U.S. Energy Information Administration's latest estimates of emissions for carbon dioxide, methane, nitrous oxide, and other greenhouse gases. Download the GHG Report Introduction For this report, activity data on coal and natural gas consumption and electricity sales and losses by sector were obtained from the January 2011 Monthly Energy Review (MER). In keeping with current international practice, this report presents data on greenhouse gas emissions in million metric tons carbon dioxide equivalent. The data can be converted to carbon equivalent units by

123

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

124

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

125

Static and Dynamic Simulation of Steam Methane Reformers  

Science Journals Connector (OSTI)

The steam-methane reaction is an essential step for many processing plants. Hydrogen, ammonia and methanol are mostly produced by means of methane steam reforming. Since hydrogen is essential for any refinery employing hydrotreating, the performance monitoring of the hydrogen plant is highly desirable. The use of models or simulation is now a standard practice in most chemical plants and refineries. However, reliable models are still lacking for speciality reactors like the methane steam reformer. This paper describes steady-state and dynamic models for the reactions involved in reforming methane and higher hydrocarbon gases. The performance of the reformer is then illustrated by sensitivity analysis to various input disturbances like inlet pressure, temperature, feed concentration and rate, fuel rate and density and steam to carbon ratio. The effect of these disturbances on exit temperature and conversion is studied and analyzed. Catalyst deactivation effects are also discussed and it is shown by sample calculations that the simulator can give insight into catalyst performance and assist in monitoring catalyst deactivation. The transient effects are also reported and dynamic elements like gains and response time are discussed. Such information should give insight into controller design and effects of various parameters.

I.M. Alatiqi; A.M. Meziou; G.A. Gasmelseed

1989-01-01T23:59:59.000Z

126

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

127

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

128

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

129

Electron Band Structure of Solid Methane: Ab Initio Calculations  

Science Journals Connector (OSTI)

The band structure of crystalline methane has been calculated in a linear-combination-of-molecular-orbitals approximation. In this molecular tight-binding method the Bloch sums are built up of Hartree-Fock orbitals of the free molecules. Interactions between the states of different molecules are calculated directly from molecular integrals without reducing the exchange interaction to an exchange potential. The approximations involved are shown to be well justified for a crystal made of closed-shell units. The band structure is obtained by solving secular equation in 400 points along the relevant symmetry lines. The calculated bands are relatively narrow, less than 2.5 eV wide, around the molecular levels. The band-to-band gap in solid methane is 24.5 eV. This value has the same order of magnitude as in solid rare gases.

Lucjan Piela; Luciano Pietronero; Raffaele Resta

1973-06-15T23:59:59.000Z

130

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...

131

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...

132

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...

133

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...

134

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...

135

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...

136

Control of pollutants in flue gases and fuel gases  

E-Print Network [OSTI]

and gasification technologies for heat and power . . . . . . . . 2-3 2.4 Waste incineration and waste . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.2 Flue gases and fuel gases: combustion, gasification, pyrolysis, incineration and other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 3.3 Formation of sulphur compounds during combustion and gasification . 3-5 3.4 Emission

Laughlin, Robert B.

137

Control of pollutants in flue gases and fuel gases  

E-Print Network [OSTI]

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.2 Flue gases and fuel gases: combustion, gasification, pyrolysis, incineration and other and gasification technologies for heat and power . . . . . . . . 2-3 2.4 Waste incineration and waste . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 3.3 Formation of sulphur compounds during combustion and gasification . . 3-5 3.4 Emission

Zevenhoven, Ron

138

Contribution of Anaerobic Digesters to Emissions Mitigation and Electricity Generation Under U.S. Climate Policy  

Science Journals Connector (OSTI)

Anaerobic digesters (ADs) can produce renewable energy from livestock manure, prevent the release of methane, and reduce air and water pollution, and digested manure can be applied to crops as a fertilizer. ... Comprehensive inclusion of the GHG mitigation benefits and low-carbon energy generation of AD projects within a federal climate and energy policy would further enhance prospects for new projects. ... Arthurson, V.Closing the Global Energy and Nutrient Cycles through Application of Biogas Residue to Agricultural Land - Potential Benefits and Drawbacks Energies 2009, 2 ( 2) 226– 242 ...

David P. M. Zaks; Niven Winchester; Christopher J. Kucharik; Carol C. Barford; Sergey Paltsev; John M. Reilly

2011-07-15T23:59:59.000Z

139

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

140

Potential digestibilities and digestion kinetics of forage cell wall components  

E-Print Network [OSTI]

LITERATURE REVIEW. EXPERIMENTAL PROCEDURES. Chemical Analysis Colorimetric Determinations Statistical Evaluation. 10 13 15 IV RESULTS AND DISCUSSION 16 V Characteristics of Forage Kinetics of Cell Wall Digestion SUMMARY AND CONCLUSIONS... and both of these variables appear to be the result of several dynamic processes. The amount of structural carbohydrates, the main constituents of the fibrous cell wall, ruminants can digest appears to be limited by the potential digestibility...

Tauskey, William Henry

1973-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "digester gases 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

Federal Energy Management Program: Greenhouse Gases  

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

Greenhouse Gases Greenhouse Gases to someone by E-mail Share Federal Energy Management Program: Greenhouse Gases on Facebook Tweet about Federal Energy Management Program: Greenhouse Gases on Twitter Bookmark Federal Energy Management Program: Greenhouse Gases on Google Bookmark Federal Energy Management Program: Greenhouse Gases on Delicious Rank Federal Energy Management Program: Greenhouse Gases on Digg Find More places to share Federal Energy Management Program: Greenhouse Gases on AddThis.com... Sustainable Buildings & Campuses Operations & Maintenance Greenhouse Gases Basics Federal Requirements Guidance & Reporting Inventories & Performance Mitigation Planning Resources Contacts Water Efficiency Data Center Energy Efficiency Industrial Facilities Sustainable Federal Fleets

142

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

143

Voluntary Reporting of Greenhouse Gases  

Reports and Publications (EIA)

The Voluntary Reporting of Greenhouse Gases Program was suspended May 2011. It was a mechanism by which corporations, government agencies, individuals, voluntary organizations, etc., could report to the Energy Information Administration, any actions taken that have or are expected to reduce/avoid emissions of greenhouse gases or sequester carbon.

2011-01-01T23:59:59.000Z

144

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.

145

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

146

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

147

Amorphous silicon-carbon alloys and amorphous carbon from direct methane and ethylene activation by ECR  

SciTech Connect (OSTI)

Hydrogenated amorphous silicon-carbon alloys are prepared using electron-cyclotron resonance (ECR) plasma-enhanced chemical vapor deposition. Hydrogen is introduced into the source resonance cavity as an excitation gas. Silane is introduced in the main chamber in the vicinity of the plasma stream, whereas the carbon source gases, methane or ethylene, are introduced either with the silane or with the hydrogen as excitation gases. The effect of the type of carbon-source gas, excitation gas mixture and silane-to-carbon source gas flow ratio on the deposition rate, bandgap, subgap density of states, spin density and hydrogen evolution are studied.

Conde, J.P.; Chu, V.; Giorgis, F.; Pirri, C.F.; Arekat, S.

1997-07-01T23:59:59.000Z

148

The Anaerobic Digestion of Organic  

E-Print Network [OSTI]

, pursuing alternative and renewable energy has become imperative from both practical and ethical standpoints production is just one of the many renewable energy alternatives out there. Defined as the digestion of Anaerobic Digestion 3.1. Municipal Waste Management 3.2. Climate Change Mitigation 3.2.1. Untreated

Iglesia, Enrique

149

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...

150

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...

151

Greenhouse Gases | Department of Energy  

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

Greenhouse Gases Greenhouse Gases Greenhouse Gases October 7, 2013 - 9:59am Addthis Executive Order 13514 requires Federal agencies to inventory and manage greenhouse gas (GHG) emissions to meet Federal goals and mitigate climate change. Basics: Read an overview of greenhouse gases. Federal Requirements: Look up requirements for agency greenhouse gas management as outlined in Federal initiatives and executive orders. Guidance and Reporting: Find guidance documents and resources for greenhouse gas accounting and reporting. GHG Inventories and Performance: See detailed comprehensive GHG inventories by Federal agency and progress toward achieving Scope 1 and 2 GHG and Scope 3 GHG reduction targets. Mitigation Planning: Learn how Federal agencies can cost-effectively meet their GHG reduction goals.

152

Degenerate quantum gases of strontium  

E-Print Network [OSTI]

Degenerate quantum gases of alkaline-earth-like elements open new opportunities in research areas ranging from molecular physics to the study of strongly correlated systems. These experiments exploit the rich electronic structure of these elements, which is markedly different from the one of other species for which quantum degeneracy has been attained. Specifically, alkaline-earth-like atoms, such as strontium, feature metastable triplet states, narrow intercombination lines, and a non-magnetic, closed-shell ground state. This review covers the creation of quantum degenerate gases of strontium and the first experiments performed with this new system. It focuses on laser-cooling and evaporation schemes, which enable the creation of Bose-Einstein condensates and degenerate Fermi gases of all strontium isotopes, and shows how they are used for the investigation of optical Feshbach resonances, the study of degenerate gases loaded into an optical lattice, as well as the coherent creation of Sr_2 molecules.

Stellmer, Simon; Killian, Thomas C

2013-01-01T23:59:59.000Z

153

Turning greenhouse gases into gold  

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

gases, with carbon dioxide (CO2) often accused of being the primary instigator of global climate change. As a result, numerous efforts are under way to find ways to prevent,...

154

ARM - What are Greenhouse Gases?  

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

radiative forcing (which means they enhance global warming). Many of these gases are naturally occurring and are essential to life on earth by providing a blanket for marine and...

155

Greenhouse Gases and Emissions Trading  

Science Journals Connector (OSTI)

Atmospheric concentrations of carbon dioxide and other greenhouse gases have grown rapidly since the beginning of this century. Unless emissions are controlled, the world could face rapid climate changes, incl...

Alice LeBlanc; Daniel J. Dudek

1993-01-01T23:59:59.000Z

156

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 35.2225Ā°, -80.837539Ā° 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":""}]}

157

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

158

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

159

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

160

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

Note: This page contains sample records for the topic "digester gases 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

Raman spectroscopic and mass spectrometric investigations of the hydrogen isotopes and isotopically labelled methane  

SciTech Connect (OSTI)

Suitable analytical methods must be tested and developed for monitoring the individual process steps within the fuel cycle of a fusion reactor and for tritium accountability. The utility of laser-Raman spectroscopy accompanied by mass spectrometry with an Omegatron was investigated using the analysis of all hydrogen isotopes and isotopically labeled methanes as an example. The Omegatron is useful for analyzing all hydrogen isotopes mixed with the stable helium isotopes. The application of this mass spectrometer were demonstrated by analyzing mixtures of deuterated methanes. In addition, it was employed to study the radiochemical Witzbach exchange reaction between tritium and methanes. A laser-Raman spectrometer was designed for analysis of tritium-containing gases and was built from individual components. A tritium-compatible, metal-sealed Raman cuvette having windows with good optical properties and additional means for measuring the stray light was first used successfully in this work. The Raman spectra of the hydrogen isotopes were acquired in the pure rotation mode and in the rotation-vibration mode and were used for on. The deuterated methanes were measured by Raman spectroscopy, the wavenumbers determined were assigned to the corresponding vibrations, and the wavenumbers for the rotational fine-structure were summarized in tables. The fundamental Vibrations of the deuterated methanes produced Witzbach reactions were detected and assigned. The fundamental vibrations of the molecules were obtained with Raman spectroscopy for the first time in this work. The @-Raman spectrometer assembled is well suited for the analysis of tritium- containing gases and is practical in combination with mass spectrometry using an Omegatron, for studying gases used in fusion.

Jewett, J.R., Fluor Daniel Hanford

1997-02-24T23:59:59.000Z

162

Citrus essential oils and their influence on the anaerobic digestion process: An overview  

Science Journals Connector (OSTI)

Abstract Citrus waste accounts for more than half of the whole fruit when processed for juice extraction. Among valorisation possibilities, anaerobic digestion for methane generation appears to be the most technically feasible and environmentally friendly alternative. However, citrus essential oils can inhibit this biological process. In this paper, the characteristics of citrus essential oils, as well as the mechanisms of their antimicrobial effects and potential adaptation mechanisms are reviewed. Previous studies of anaerobic digestion of citrus waste under different conditions are presented; however, some controversy exists regarding the limiting dosage of limonene for a stable process (24–192 mg of citrus essential oil per liter of digester and day). Successful strategies to avoid process inhibition by citrus essential oils are based either on recovery or removal of the limonene, by extraction or fungal pre-treatment respectively.

B. Ruiz; X. Flotats

2014-01-01T23:59:59.000Z

163

Improved bio-energy yields via sequential ethanol fermentation and biogas digestion of steam exploded oat straw  

Science Journals Connector (OSTI)

Using standard laboratory equipment, thermochemically pretreated oat straw was enzymatically saccharified and fermented to ethanol, and after removal of ethanol the remaining material was subjected to biogas digestion. A detailed mass balance calculation shows that, for steam explosion pretreatment, this combined ethanol fermentation and biogas digestion converts 85–87% of the higher heating value (HHV) of holocellulose (cellulose and hemicellulose) in the oat straw into biofuel energy. The energy (HHV) yield of the produced ethanol and methane was 9.5–9.8 MJ/(kg dry oat straw), which is 28–34% higher than direct biogas digestion that yielded 7.3–7.4 MJ/(kg dry oat straw). The rate of biogas formation from the fermentation residues was also higher than from the corresponding pretreated but unfermented oat straw, indicating that the biogas digestion could be terminated after only 24 days. This suggests that the ethanol process acts as an additional pretreatment for the biogas process.

Debebe Yilma Dererie; Stefan Trobro; Majid Haddad Momeni; Henrik Hansson; Johanna Blomqvist; Volkmar Passoth; Anna Schnürer; Mats Sandgren; Jerry Ståhlberg

2011-01-01T23:59:59.000Z

164

Methane generation at Grand Gulf Nuclear Station  

SciTech Connect (OSTI)

The methane generation at Grand Gulf has been brought to light twice. The initial event occurred in February 1990 and the second in December 1993. Both events involved the receipt of a cask at Barnwell Waste Management Facility that when opened indicated a gas escaping. The gas was subsequently sampled and indicated a percentage of explosive gas. Both events involved powdered resin and indicated that the generation was from a bacterial attack of the organic materials (cellulose in the powdered resin mixture). The first event occurred and was believed to be isolated in a particular waste stream. The situation was handled and a biocide was found to be effective in treatment of liners until severe cross contamination of another waste stream occurred. This allowed the shipment of a liner that was required to be sampled for explosive gases. The biocide used by GGNS was allowed reintroduction into the floor drains and this allowed the buildup of immunity of the bacterial population to this particular biocide. The approval of a new biocide has currently allowed GGNS to treat liners and ship them offsite.

Carver, M.L. [Entergy Operations, Inc., Grand Gulf Nuclear Station, Port Gibson, MS (United States)

1995-09-01T23:59:59.000Z

165

Emissions of greenhouse gases in the United States, 1985--1990  

SciTech Connect (OSTI)

The Earth`s capacity to support life depends on the moderating influences of gases that envelop the planet and warm its surface and protect it from harmful radiation. These gases are referred to as ``greenhouse gases.`` Their warming capacity, called ``the greenhouse effect,`` is essential to maintaining a climate hospitable to all plant, animal, and human life. In recent years, however, there has been increasing concern that human activity may be affecting the intricate balance between the Earth`s absorption of heat from the sun and its capacity to reradiate excess heat back into space. Emissions of greenhouse gases from human activities may be an important mechanism that affects global climate. Thus, research is intensifying to improve our understanding of the role human activities might play in influencing atmospheric concentrations of greenhouse gases. On the basis of scientific findings of the past few decades, the US Government and the international community at large are now taking steps toward stabilizing greenhouse gas emissions. This report contributes to that process. Mandated by Congress this report provides estimates of US emissions of the principal greenhouse gases--carbon dioxide, methane, nitrous oxide, chlorofluorcarbons, carbon monoxide, nitrogen oxides, and nonmethane volatile organic compounds. Estimates are for the period 1985 to 1990. Preliminary estimates for 1991 have also been included, whenever data were available.

Not Available

1993-11-10T23:59:59.000Z

166

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

167

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 (ā??Methane in the Arctic Shelfā?¯ 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 (ā??metagenomesā?¯). 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

168

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

169

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

170

RCM Digesters | Open Energy Information  

Open Energy Info (EERE)

RCM Digesters RCM Digesters Jump to: navigation, search Name RCM Digesters Place Berkeley, California Zip CA 94704 Product Manufactures anaerobic manure digesters which process animal waste into biogas. Coordinates 38.748315Ā°, -90.334929Ā° 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":38.748315,"lon":-90.334929,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

171

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)

172

Climate VISION: Greenhouse Gases Information  

Office of Scientific and Technical Information (OSTI)

GHG Information GHG Information Greenhouse Gases, Global Climate Change, and Energy Emissions of Greenhouse Gases in the United States 2001 [1605(a)] This report, required by Section 1605(a) of the Energy Policy Act of 1992, provides estimates of U.S. emissions of greenhouse gases, as well as information on the methods used to develop the estimates. The estimates are based on activity data and applied emissions factors, not on measured or metered emissions monitoring. Available Energy Footprints Industry NAICS* All Manufacturing Alumina & Aluminum 3313 Cement 327310 Chemicals 325 Fabricated Metals 332 Food and Beverages 311, 312 Forest Products 321, 322 Foundries 3315 Glass & Glass Products, Fiber Glass 3272, 3296 Iron & Steel Mills 331111 Machinery & Equipment 333, 334, 335, 336

173

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

174

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

175

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 Ā– Santa Barbara, Santa Barbara (UCSB), CA 93106 Background The global methane reservoir in the form of gas hydrate is estimated at 500Ā–10,000 Gt (KVENVOLDEN, 1995; MILKOV, 2004). This pool of carbon

176

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...

177

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 ...

Gwenaėl Abril; Alberto Vieira Borges

2005-01-01T23:59:59.000Z

178

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

179

Investigating and Using Biomass Gases  

K-12 Energy Lesson Plans and Activities Web site (EERE)

Students will be introduced to biomass gasification and will generate their own biomass gases. Students generate these everyday on their own and find it quite amusing, but this time they’ll do it by heating wood pellets or wood splints in a test tube. They will collect the resulting gases and use the gas to roast a marshmallow. Students will also evaluate which biomass fuel is the best according to their own criteria or by examining the volume of gas produced by each type of fuel.

180

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

Note: This page contains sample records for the topic "digester gases 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

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

182

Clean Gases for Gas Chromatography  

Science Journals Connector (OSTI)

......to purchase such clean gases. Even research grades...no maintenance, at the cost of 500 watts of electrical...Exploration and Production Research Division, Hous...hour. The maintenance cost of the cold trap is only...displaces the contaminated gas which has passed into......

B. Osborne Prescott; Harold L. Wise

1966-02-01T23:59:59.000Z

183

Enhanced methane production from wool textile residues by thermal and enzymatic pretreatment  

Science Journals Connector (OSTI)

Abstract Methane production from two types of wool textile wastes (TW1 and TW2) was investigated. To improve the digestibility of these textiles, different pretreatments were applied, and comprised thermal treatment (at 120 °C for 10 min), enzymatic hydrolysis (using an alkaline endopeptidase at different levels of enzymatic loading, at 55 °C for 0, 2, and 8 h), and a combination of these two treatments. Soluble protein concentration and sCOD (soluble chemical oxygen demand) were measured to evaluate the effectivity of the different pretreatment conditions to degrade wool keratin. The sCOD as well as the soluble protein content had increased in both textile samples in comparison to untreated samples, as a response to the different pretreatments indicating breakdown of the wool keratin structure. The combined treatments and the thermal treatments were further evaluated by anaerobic batch digestion assays at 55 °C. Combined thermal and enzymatic treatment of TW1 and TW2 resulted in methane productions of 0.43 N m3/kg VS and 0.27 N m3/kg VS, i.e., 20 and 10 times higher yields, respectively, than that gained from untreated samples. The application of thermal treatment by itself was less effective and resulted in increasing the methane production by 10-fold for TW1 and showing no significant improvement for TW2.

Maryam M. Kabir; Gergely Forgįcs; Ilona Sįrvįri Horvįth

2013-01-01T23:59:59.000Z

184

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.

185

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.

186

Industrial Gases as a Vehicle for Competitiveness  

E-Print Network [OSTI]

the diversity and options available to enable cost savings and environmentally driven process improvements. Industrial gases have come of age during the last fifteen years. Engineers and scientists have looked beyond the paradigms of their operations...INDUSTRIAL GASES AS A VEHICLE FOR COMPETITIVENESS James R. Dale, Director, Technology Programs, Airco Industrial Gases Division, The BOC Group, Inc., Murray Hill, New Jersey ABSTRACT Industrial gases are produced using compressed air...

Dale, J. R.

187

Biofuels Digest | Open Energy Information  

Open Energy Info (EERE)

Digest Digest Jump to: navigation, search Name Biofuels Digest Address 801 Brickell Avenue Suite 900 Place Miami, Florida Zip 33131 Sector Services Product Information Year founded 2007 Number of employees 1-10 Phone number 786-393-8530 Website http://www.biofuelsdigest.com Coordinates 25.765653Ā°, -80.190405Ā° 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":25.765653,"lon":-80.190405,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

188

Microbial Sequestration of Carbon Dioxide and Subsequent Conversion to Methane  

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

Sequestration of Carbon Dioxide and Subsequent Sequestration of Carbon Dioxide and Subsequent conversion to Methane By Nirupam Pal Associate Professor California Polytechnic State University San Luis Obispo, CA 93401 Email : npal@calpoly.edu Phone : (805) 756-1355 INTRODUCTION The rising level of carbon dioxide in the atmosphere has been of growing concern in recent years. The increasing levels of carbon dioxide, the most dominant component of greenhouse gases, contribute to global warming and changing global weather patterns which could potentially lead to catastrophic events that could threaten life in every form on this planet. The level of carbon dioxide in the worlds atmosphere has increased from about 280 ppm in 1850 to the current level of approximately 350 ppm. There are several natural sources and sinks of

189

Greenhouse Gases Converted to Fuel  

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

Greenhouse Greenhouse Gases Converted to Fuel Greenhouse Gases Converted to Fuel carbon-conversion-fig-1.jpg Key Challenges: An important strategy for reducing global CO2 emissions calls for capturing the greenhouse gas and converting it to fuels and chemicals. Although researchers working toward that goal demonstrated in 1992 such a reaction in the lab, a key outstanding scientific challenge was explaining the details of how the reaction took place - its "mechanism." Why it Matters: An important potential strategy for reducing global CO2 emissions calls for capturing the greenhouse gas and converting it electrochemically to fuels and chemicals. Accomplishments: Computation to explain how carbon dioxide can be converted to small organic molecules with little energy input. The

190

Ozone treatment of biomass to enhance digestibility  

E-Print Network [OSTI]

is very resistant to enzymatic degradation. Lignocellulosic materials require pretreatment to enhance their digestibility. The main objective of this research was to further enhance the digestibility of biomass (bagasse) with ozonation as a follow...

Almendarez, Maria Elena

2000-01-01T23:59:59.000Z

191

Kinetic modeling and experimentation of anaerobic digestion  

E-Print Network [OSTI]

Anaerobic digesters convert organic waste (agricultural and food waste, animal or human manure, and other organic waste), into energy (in the form of biogas or electricity). An added benefit to bio-digestion is a leftover ...

Rea, Jonathan (Jonathan E.)

2014-01-01T23:59:59.000Z

192

Inactivation of poliovirus in digested sludge.  

Science Journals Connector (OSTI)

...Inactivation of poliovirus in digested sludge. R L Ward C S Ashley The effect of anaerobically digested sludge on poliovirus during incubation at temperatures...Although virus was fully recoverable from sludge, its infectivity decreased in proportion...

R L Ward; C S Ashley

1976-06-01T23:59:59.000Z

193

?enseignement de ?endoscopie digestive en Italie  

Science Journals Connector (OSTI)

En Italie, nous disposons de deux écoles de postgraduat : Gastroentérologie et Endoscopie Digestive et ?autre part : Chirurgie Digestive et Endoscopie Chirurgicale. Le premier cours dure quatre ans, le second cin...

A. Russo

1991-07-01T23:59:59.000Z

194

Methane production from marine biomass  

SciTech Connect (OSTI)

The overall concept of the giant brown kelp farm and conversion system, the integrated research program engaged in its study, and IGT's work on biogasification process development are discussed. A summary of results to date on anaerobic digestion will be emphasized. (MHR)

Chynoweth, D.P.; Srivastava, V.J.

1980-01-01T23:59:59.000Z

195

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

196

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

197

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

198

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

199

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

200

Efficiency and emissions of a spark ignition engine fueled with synthetic gases obtained from catalytic decomposition of biogas  

Science Journals Connector (OSTI)

This paper presents the results of the tests developed in a naturally aspirated spark ignition engine, intended for installation in vehicles, fueled with synthetic gases obtained from catalytic decomposition of biogas. The experimental tests were carried out at three equivalence ratios and different speeds and loads. Two synthetic blends were used and the results were compared with those of gasoline and methane. Efficiency and emissions were calculated for the different fuels under the same operation conditions and it was found that at lean equivalence ratios, brake thermal efficiency with synthetic gases approached to the traditional fuels and even improved it at ? = 0.7. BSCO2 emissions increased due to the CO2 content of the gaseous blends. While CO increased at stoichiometric conditions, it decreased at lean conditions because the H2 contained in synthetic gases improved combustion at these conditions. BSHC measured were very low with synthetic gases because of the low content of methane in blends. The change in the fraction of H2 and CO2 of the synthetic blends led to quite different results in BSNOx. Syngas 1 \\{BSNOx\\} emissions were the lowest of all fuels, while syngas 2 \\{BSNOx\\} were the highest because of its high H2 fraction.

J. Arroyo; F. Moreno; M. Muńoz; C. Monné

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "digester gases 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 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

202

Synthesis of superlow friction carbon films from highly hydrogenated methane plasmas.  

SciTech Connect (OSTI)

In this study, we investigated the friction and wear performance of diamondlike carbon films (DLC) derived from increasingly hydrogenated methane plasmas. The films were deposited on steel substrates by a plasma-enhanced chemical vapor deposition process at room temperature and the tribological tests were performed in dry nitrogen. Tests results revealed a close correlation between the hydrogen in source gas plasma and the friction and wear coefficients of the DLC films. Specifically, films grown in plasmas with higher hydrogen-to-carbon ratios had much lower friction coefficients and wear rates than did films derived from source gases with lower hydrogen-to-carbon ratios. The lowest friction coefficient (0.003) was achieved with a film derived from 25% methane--75% hydrogen, while a coefficient of 0.015 was found for films derived from pure methane. Similar correlations were observed for wear rates. Films derived from hydrogen-rich plasmas had the least wear, while films derived from pure methane suffered the highest wear. We used a combination of surface analytical methods to characterize the structure and chemistry of the DLC films and worn surfaces.

Erdemir, A.; Eryilmaz, O. L.; Nilufer, I. B.; Fenske, G. R.

2000-10-13T23:59:59.000Z

203

Electron-induced dry reforming of methane in a temperature-controlled dielectric barrier discharge reactor  

Science Journals Connector (OSTI)

Dry reforming of methane has the potential to reduce the greenhouse gases methane and carbon dioxide and to generate hydrogen-rich syngas. In reforming methane, plasma-assisted reforming processes may have advantages over catalytic processes because they are free from coking and their response time for mobile applications is quick. Although plasma-assisted reforming techniques have seen recent developments, systematic studies that clarify the roles that electron-induced chemistry and thermo-chemistry play are needed for a full understanding of the mechanisms of plasma-assisted reformation. Here, we developed a temperature-controlled coaxial dielectric barrier discharge (DBD) apparatus to investigate the relative importance of electron-induced chemistry and thermo-chemistry in dry reforming of methane. In the tested background temperature range 297–773 K, electron-induced chemistry, as characterized by the physical properties of micro-discharges, was found to govern the conversions of CH4 and CO2, while thermo-chemistry influenced the product selectivities because they were found to depend on the background temperature. Comparisons with results from arc-jet reformation indicated that thermo-chemistry is an efficient conversion method. Our findings may improve designs of plasma-assisted reformers by using relatively hotter plasma sources. However, detailed chemical kinetic studies are needed.

Xuming Zhang; Min Suk Cha

2013-01-01T23:59:59.000Z

204

,"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...

205

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...

206

,"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...

207

,"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...

208

,"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...

209

,"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"...

210

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

211

,"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...

212

,"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...

213

,"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...

214

,"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...

215

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

216

,"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...

217

,"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...

218

,"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...

219

,"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"...

220

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.

Note: This page contains sample records for the topic "digester gases 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

Model calibration and validation for OFMSW and sewage sludge co-digestion reactors  

SciTech Connect (OSTI)

Highlights: > Disintegration is the limiting step of the anaerobic co-digestion process. > Disintegration kinetic constant does not depend on the waste particle size. > Disintegration kinetic constant depends only on the waste nature and composition. > The model calibration can be performed on organic waste of any particle size. - Abstract: A mathematical model has recently been proposed by the authors to simulate the biochemical processes that prevail in a co-digestion reactor fed with sewage sludge and the organic fraction of municipal solid waste. This model is based on the Anaerobic Digestion Model no. 1 of the International Water Association, which has been extended to include the co-digestion processes, using surface-based kinetics to model the organic waste disintegration and conversion to carbohydrates, proteins and lipids. When organic waste solids are present in the reactor influent, the disintegration process is the rate-limiting step of the overall co-digestion process. The main advantage of the proposed modeling approach is that the kinetic constant of such a process does not depend on the waste particle size distribution (PSD) and rather depends only on the nature and composition of the waste particles. The model calibration aimed to assess the kinetic constant of the disintegration process can therefore be conducted using organic waste samples of any PSD, and the resulting value will be suitable for all the organic wastes of the same nature as the investigated samples, independently of their PSD. This assumption was proven in this study by biomethane potential experiments that were conducted on organic waste samples with different particle sizes. The results of these experiments were used to calibrate and validate the mathematical model, resulting in a good agreement between the simulated and observed data for any investigated particle size of the solid waste. This study confirms the strength of the proposed model and calibration procedure, which can thus be used to assess the treatment efficiency and predict the methane production of full-scale digesters.

Esposito, G., E-mail: giovanni.esposito@unicas.it [Department of Mechanics, Structures and Environmental Engineering, University of Cassino, via Di Biasio 43, 03043 Cassino (Italy); Frunzo, L., E-mail: luigi.frunzo@unina.it [Department of Mathematics and Applications Renato Caccioppoli, University of Naples Federico II, via Cintia, Monte S. Angelo, I-80126 Naples (Italy); Panico, A., E-mail: anpanico@unina.it [Department of Hydraulic, Geotechnical and Environmental Engineering, University of Naples Federico II, via Claudio 21, 80125 Naples (Italy); Pirozzi, F., E-mail: francesco.pirozzi@unina.it [Department of Hydraulic, Geotechnical and Environmental Engineering, University of Naples Federico II, via Claudio 21, 80125 Naples (Italy)

2011-12-15T23:59:59.000Z

222

1988 Pilot Institute on Global Change on trace gases and the biosphere  

SciTech Connect (OSTI)

This proposal seeks multi-agency funding to conduct an international, multidisciplinary 1988 Pilot Institute on Global Change to take place from August 7 through 21, 1988, on the topic: Trace Gases and the Biosphere. The institute, to be held in Snowmass, Colorado, is envisioned as a pilot version of a continuing series of institutes on Global Change (IGC). This proposal seeks support for the 1988 pilot institute only. The concept and structure for the continuing series, and the definition of the 1988 pilot institute, were developed at an intensive and multidisciplinary Summer Institute Planning Meeting in Boulder, Colorado, on August 24--25, 1987. The theme for the 1988 PIGC, Trace Gases and the Biosphere, will focus a concerted, high-level multidisciplinary effort on a scientific problem central to the Global Change Program. Dramatic year-to-year increases in the global concentrations of radiatively-active trace gases such as methane and carbon dioxide are now well documented. The predicted climatic effects of these changes lend special urgency to efforts to study the biospheric sources and sinks of these gases and to clarify their interactions and role in the geosphere-biosphere system.

Eddy, J.A.; Moore, B. III

1998-07-01T23:59:59.000Z

223

The Viscosity of Compressed Gases  

Science Journals Connector (OSTI)

New data and a new theory for the viscosity of compressed gases are presented. Data for nitrogen, hydrogen and a mixture of these gases are given, in the calculation of which, the "end effects" are not neglected as has been done in the past. Previous viscosity data are of doubtful validity owing to neglect of this factor. The theory is based on an analogy between the kinetic pressure and viscosity of a gas and is derived using an equation of state of the Lorentz type. Allowance is made for the difference between the viscosity and compressibility covolumes. The theory is substantiated experimentally and further confirmed by the recalculation of other data on the variation of Reynolds' criterion with the pressure, which is here shown to be constant. The mixture data offer a direct opportunity of comparing the Lorentz and linear rules for the calculation of the covolume of a mixture from the covolumes of the components and such comparison indicates that the Lorentz rule is not to be preferred. The substantiation of the new theory is the first direct proof of the validity of the separate treatment of the kinetic and cohesive pressures in the equation of state.

James H. Boyd; Jr.

1930-05-15T23:59:59.000Z

224

Process for separating coal synthesized methane from unreacted intermediate and contaminant gases  

DOE Patents [OSTI]

Gas produced from coal and containing CH.sub.4, CO, CO.sub.2, H.sub.2 and H.sub.2 S is contacted with CO.sub.2 scrub liquid to form (1) a liquid CO.sub.2 stream containing as solutes CH.sub.4, H.sub.2 S and minor portions of the CO and H.sub.2, and (2) a gas stream containing CO.sub.2 and major portions of the CO and H.sub.2, the CO and H.sub.2 in this stream being recycled to the means which produces gas from coal, and CO.sub.2 in the stream being recycled to the scrub liquid. The solute-bearing liquid CO.sub.2 stream is fractionated into (1) a liquid CO.sub.2 stream containing CH.sub.4 and H.sub.2 S, and (2) a H.sub.2 /CO gas stream which is recycled into contact with the scrub liquid. The last-mentioned liquid CO.sub.2 stream is fractionated into (1) a CH.sub.4 /CO.sub.2 gas stream the CO.sub.2 of which is recycled to the scrub liquid, and (2) a liquid CO.sub.2 stream containing H.sub.2 S, and CO.sub.2 of this stream is also recycled to the scrub liquid.

Barker, Ray E. (Knoxville, TN); Scott, Charles D. (Oak Ridge, TN); Ryon, Allen D. (Oak Ridge, TN)

1982-01-01T23:59:59.000Z

225

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...

226

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

227

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...

228

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...

229

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...

230

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...

231

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,...

232

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...

233

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,...

234

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,...

235

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...

236

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,...

237

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,...

238

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,...

239

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)...

240

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...

Note: This page contains sample records for the topic "digester gases 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

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...

242

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

243

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...

244

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...

245

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...

246

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...

247

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,...

248

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...

249

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

250

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,...

251

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...

252

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,...

253

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,...

254

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

255

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

256

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...

257

ARM - Lesson Plans: Dissolved Gases in Water  

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

released into the air, additional CO2 Would intensify an already-problematic greenhouse effect. Preparation Demonstrate that water contains invisible gases. Collect and cover...

258

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

259

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

260

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

Note: This page contains sample records for the topic "digester gases 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

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

262

Granular gases under extreme driving  

E-Print Network [OSTI]

We study inelastic gases in two dimensions using event-driven molecular dynamics simulations. Our focus is the nature of the stationary state attained by rare injection of large amounts of energy to balance the dissipation due to collisions. We find that under such extreme driving, with the injection rate much smaller than the collision rate, the velocity distribution has a power-law high energy tail. The numerically measured exponent characterizing this tail is in excellent agreement with predictions of kinetic theory over a wide range of system parameters. We conclude that driving by rare but powerful energy injection leads to a well-mixed gas and constitutes an alternative mechanism for agitating granular matter. In this distinct nonequilibrium steady-state, energy cascades from large to small scales. Our simulations also show that when the injection rate is comparable with the collision rate, the velocity distribution has a stretched exponential tail.

W. Kang; J. Machta; E. Ben-Naim

2010-02-04T23:59:59.000Z

263

High pressure/high temperature vapor liquid equilibrium study of light gases in hydrogen-coal liquid model compound systems using perturbation chromatography  

SciTech Connect (OSTI)

Perturbation chromatography or gas-liquid partition chromatography (GLPC) provides a powerful tool for making physicochemical measurements. In this investigation GLPC was applied to study the vapor-liquid equilibrium behavior of light gases in nonvolatile coal liquid model compound solvents at high temperatures and high pressures. Improvements made in existing GLPC techniques include: the use of a high pressure tandem proportioning pump to give precise control of the carrier gas flow rate and low pressure drops; a high pressure ionization chamber to detect the injection of very dilute radioactive sample gases; and the use of a microcomputer to provide instantaneous integration and very precise retention times of the chromatographic peaks. Infinite dilution K-values for methane, ethane, propane, n-butane, carbon dioxide, and hydrogen sulfide in hydrogen-dibenzofuran systems were obtained at 100 and 125 C and up to 800 psia. Infinite dilution K-values for the same light gases in hydrogen-9-methylanthracene systems were obtained at 100, 125, 150, 175, and 200 C and up to 3000 psia. Henry's constants were determined for the light gases in 9-methylanthracene. Second cross virial coefficients and vapor phase infinite dilution fugacity coefficients were calculated for methane, ethane, propane, and n-butane in hydrogen. These results were combined with the experimental K-value measurements to obtain Henry's constants in hydrogen-9-methylanthracene mixtures of fixed liquid compositions. Infinite dilution heats of solution of the solute gases in the mixtures were calculated.

Kragas, T.K.

1983-01-01T23:59:59.000Z

264

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

E-Print Network [OSTI]

Energy Production . C.Benefits and Renewable Energy Production One source ofsource of renewable energy production from such facilities.

Di Camillo, Nicole G.

2011-01-01T23:59:59.000Z

265

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

E-Print Network [OSTI]

Renewable Energy Production .Benefits and Renewable Energy Production One source ofauspicious source of renewable energy production from such

Di Camillo, Nicole G.

2011-01-01T23:59:59.000Z

266

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

267

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.

268

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

269

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

270

Statistical Digest No. 70 Fishery Statistics of  

E-Print Network [OSTI]

. These statistics include data on the volume and value of landed catches, employment, quantity of gear operatedStatistical Digest No. 70 Statistics of the United States 1976 Washington National Marine Fisheries Service #12;#12;Statistical Digest No. 70 Fishery Statistics of the United States

271

Chemical Reactor Analysis and Optimal Digestion  

E-Print Network [OSTI]

J 310 Chemical Reactor Analysis and Optimal Digestion An optimal digestion theory can be readily derived from basic principles o f chemical reactor analysis and design Deborah L. Penry and Peter for formulating and solving optimization problems (Bellman 1957), the entire process is optimized only

Jumars, Pete

272

Colorado Nonhydrocarbon Gases Removed from Natural Gas (Million...  

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

Nonhydrocarbon Gases Removed from Natural Gas (Million Cubic Feet) Colorado Nonhydrocarbon Gases Removed from Natural Gas (Million Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3...

273

EIA-Voluntary Reporting of Greenhouse Gases Program - What are...  

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

gases such as hydrofluorocarbons, perfluorocarbons, and sulfur hexafluoride). The Greenhouse Effect Concentrations of several important greenhouse gases have increased by about 33...

274

T-728: Apache Tomcat HTTP DIGEST Authentication Weaknesses Let...  

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

8: Apache Tomcat HTTP DIGEST Authentication Weaknesses Let Remote Users Conduct Bypass Attacks T-728: Apache Tomcat HTTP DIGEST Authentication Weaknesses Let Remote Users Conduct...

275

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...

276

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

277

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

278

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

279

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

280

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

Note: This page contains sample records for the topic "digester gases 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

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

282

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.

283

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...

284

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

285

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

286

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...

287

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...

288

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...

289

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...

290

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...

291

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...

292

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...

293

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...

294

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...

295

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...

296

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...

297

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...

298

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...

299

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...

300

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...

Note: This page contains sample records for the topic "digester gases 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 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...

302

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...

303

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...

304

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...

305

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...

306

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...

307

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...

308

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...

309

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...

310

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...

311

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...

312

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...

313

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...

314

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...

315

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...

316

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...

317

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...

318

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...

319

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...

320

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...

Note: This page contains sample records for the topic "digester gases 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

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...

322

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

323

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...

324

E-Print Network 3.0 - anaerobic sludge digestion Sample Search...  

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

digestion Search Powered by Explorit Topic List Advanced Search Sample search results for: anaerobic sludge digestion...

325

E-Print Network 3.0 - anaerobic sludge digester Sample Search...  

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

digester Search Powered by Explorit Topic List Advanced Search Sample search results for: anaerobic sludge digester...

326

Emissions of greenhouse gases in the United States, 1987--1994  

SciTech Connect (OSTI)

The Energy Information Administration (EIA) is required by the Energy Policy Act of 1992 to prepare a report on aggregate US national emissions of greenhouse gases for the period 1987--1992, with annual updates thereafter. This is the third annual update report,covering national emissions over the period 1987--1993, with preliminary estimates of US carbon dioxide and halocarbon emissions for 1994. Calculating national aggregate emissions(or ``national inventories``) of greenhouse gases is a recently developed form of intellectual endeavor. Greenhouse gas emissions are rarely measured directly or reported to statistical agencies. Thus, to prepare emissions inventories usually requires inferring emissions indirectly from information collected for other purposes. Both the available information and the inferences drawn may be of varying reliability. Chapter 1 of this report briefly recapitulates some background information about global climate change and the greenhouse effect and discusses important recent developments in global climate change activities. Chapters 2 through 6 cover emissions of carbon dioxide, methane, nitrous oxide, halocarbons, and criteria pollutants, respectively. Chapter 7 describes potential sequestration and emissions of greenhouse gases as a result of land use changes.

NONE

1995-09-25T23:59:59.000Z

327

Reduced gas pressure operation of sludge digesters: Expanded studies. Final report  

SciTech Connect (OSTI)

Previous investigations strongly suggested that the municipal anaerobic sludge digestion process could be enhanced by reactor operation with subatmospheric headspace pressures. Enhanced solids destruction and methane production along with increased process stability were observed in these earlier studies. However, due to the small scale of the anaerobic reactors used ( {approx}1.5 L), definitive steady-state measurements could not be obtained. These expanded studies were undertaken to verify and define the magnitude of the benefits that might be obtained with vacuum operation of sludge digesters. Four reactors ({approx}15.0 L) were fed municipal sludge at three different organic loading rates while being maintained with a 15-day solids retention time. One reactor had a constant headspace pressure of 1.02 atm; a second was maintained at 0.75 atm; and the remaining two reactors were operated for the majority of the day at 1.02 atm, and for part of the day with a 0.75 atm headspace pressure. Additional small-scale, batch experiments were performed to help identify controlling digestion mechanisms. The results of these expanded studies indicate that vacuum operation did not yield significant advantages over the organic loading range investigated (0.088 to 0.352 lb VSS/ft{sup 3}{center_dot}d).

Not Available

1993-09-01T23:59:59.000Z

328

Comparing greenhouse gases for policy purposes  

E-Print Network [OSTI]

In order to derive optimal policies for greenhouse gas emissions control, the discounted marginal damages of emissions of different gases must be compared. The greenhouse warming potential (GWP) index, which is most often ...

Schmalensee, Richard

1993-01-01T23:59:59.000Z

329

Voluntary reporting of greenhouse gases, 1995  

SciTech Connect (OSTI)

The Voluntary Reporting Program for greenhouse gases is part of an attempt by the U.S. Government to develop innovative, low-cost, and nonregulatory approaches to limit emissions of greenhouse gases. It is one element in an array of such programs introduced in recent years as part of the effort being made by the United States to comply with its national commitment to stabilize emissions of greenhouse gases under the Framework Convention on Climate Change. The Voluntary Reporting Program, developed pursuant to Section 1605(b) of the Energy Policy Act of 1992, permits corporations, government agencies, households, and voluntary organizations to report to the Energy Information Administration (EIA) on actions taken that have reduced or avoided emissions of greenhouse gases.

NONE

1996-07-01T23:59:59.000Z

330

Gases for an SSC muon detector  

SciTech Connect (OSTI)

Recent measurements of electron drift velocities as a function of the density-reduced electric field E/N are reported for a number of unitary gases and the mixtures CO{sub 2}/CH{sub 4} and NH{sub 3}/CF{sub 4}/Ar. Calculated values of the mean electron energy as a function of E/N are also reported for unitary gases and mixtures of CO{sub 2}/CH{sub 4}. 7 refs., 5 figs.

Christophorou, L.G.; Datskos, P.G.; Carter, J.G. (Oak Ridge National Lab., TN (USA) Tennessee Univ., Knoxville, TN (USA). Dept. of Physics and Astronomy)

1990-01-01T23:59:59.000Z

331

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

332

"Phase Transitions of Binary Gases in Porous Materials" Menachem Sahler  

E-Print Network [OSTI]

. Methane, a valuable energy source, evolves in the pores of coal, however, is not released because of its a significantly higher affinity to be adsorbed by coal than does methane. At some given temperature and pressure into coal mines, methane is displaced and can be harvested as a fuel source upon release. Thusly

Mountziaris, T. J.

333

Assessment of CO2 capture options from various points in steam methane reforming for hydrogen production  

Science Journals Connector (OSTI)

Abstract Steam methane reforming (SMR) is currently the main hydrogen production process in industry, but it has high emissions of CO2, at almost 7 kg CO2/kg H2 on average, and is responsible for about 3% of global industrial sector CO2 emissions. Here, the results are reported of an investigation of the effect of steam-to-carbon ratio (S/C) on CO2 capture criteria from various locations in the process, i.e. synthesis gas stream (location 1), pressure swing adsorber (PSA) tail gas (location 2), and furnace flue gases (location 3). The CO2 capture criteria considered in this study are CO2 partial pressure, CO2 concentration, and CO2 mass ratio compared to the final exhaust stream, which is furnace flue gases. The CO2 capture number (Ncc) is proposed as measure of capture favourability, defined as the product of the three above capture criteria. A weighting of unity is used for each criterion. The best S/C ratio, in terms of providing better capture option, is determined. CO2 removal from synthesis gas after the shift unit is found to be the best location for CO2 capture due to its high partial pressure of CO2. However, furnace flue gases, containing almost 50% of the CO2 in produced in the process, are of great significance environmentally. Consequently, the effects of oxygen enrichment of the furnace feed are investigated, and it is found that this measure improves the CO2 capture conditions for lower S/C ratios. Consequently, for an S/C ratio of 2.5, CO2 capture from a flue gas stream is competitive with two other locations provided higher weighting factors are considered for the full presence of CO2 in the flue gases stream. Considering carbon removal from flue gases, the ratio of hydrogen production rate and Ncc increases with rising reformer temperature.

R. Soltani; M.A. Rosen; I. Dincer

2014-01-01T23:59:59.000Z

334

Measuring the Isotopic Composition of Solar Wind Noble Gases  

E-Print Network [OSTI]

noble gases. #12;Exploring the Solar Wind94 Light solar wind noble gases were directly measured by mass of the light gases are known to vary with energy, so none of these provided solar isotopic and elemental5 Measuring the Isotopic Composition of Solar Wind Noble Gases Alex Meshik, Charles Hohenberg, Olga

335

Enteric bacteria in aerobically digested sludge.  

Science Journals Connector (OSTI)

...Research Article Enteric bacteria in aerobically digested sludge. S R Farrah G Bitton Indicator bacteria, Salmonella...aerobic bacteria were determined in samples of undigested sludge and sludge that had been treated by one or two stages of aerobic...

S R Farrah; G Bitton

1984-04-01T23:59:59.000Z

336

BETO Ranks High in Biofuels Digest’s Top 125 in the Advanced Bioeconomy  

Broader source: Energy.gov [DOE]

Biofuels Digest recently released its “Top 125 in the Advanced Bioeconomy,” ranking Bioenergy Technologies Office (BETO) Director Dr. Jonathan Male , Deputy Director Dr. Valerie Reed, Technology...

337

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

338

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 35.7395875Ā°, -78.8029226Ā° 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":""}]}

339

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

340

Purchase, Delivery, and Storage of Gases  

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

Purchase, Delivery, and Storage of Gases Print Purchase, Delivery, and Storage of Gases Print ALS users should follow Berkeley Lab policy, as described below, for the purchase, delivery, storage, and use of all gases at the ALS. See Shipping and Receiving for information on any non-gas deliveries. Contacts: Gas purchase or delivery: ALS Receiving, 510-486-4494 Gas use and storage: Experiment Coordination, 510-486-7222, This e-mail address is being protected from spambots. You need JavaScript enabled to view it Gas Storage: Berkeley Lab Chemical Inventory All gas bottles and cylinders at the ALS must be identified with bar code and logged into the Berkeley Lab Chemical Inventory by ALS staff. The inventory will be updated periodically; for more information contact Experiment Coordination. Gases are stored either in the racks between buildings 6 and 7; toxic and corrosive gases are stored in Building 6, room 6C across the walkway from beamline 10.0.

Note: This page contains sample records for the topic "digester gases 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

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...

342

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

343

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...

344

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...

345

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...

346

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...

347

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...

348

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...

349

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...

350

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...

351

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...

352

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...

353

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...

354

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...

355

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

356

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

357

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

358

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

359

Carbonaceous material for production of hydrogen from low heating value fuel gases  

DOE Patents [OSTI]

A process for the catalytic production of hydrogen, from a wide variety of low heating value fuel gases containing carbon monoxide, comprises circulating a carbonaceous material between two reactors--a carbon deposition reactor and a steaming reactor. In the carbon deposition reactor, carbon monoxide is removed from a fuel gas and is deposited on the carbonaceous material as an active carbon. In the steaming reactor, the reactive carbon reacts with steam to give hydrogen and carbon dioxide. The carbonaceous material contains a metal component comprising from about 75% to about 95% cobalt, from about 5% to about 15% iron, and up to about 10% chromium, and is effective in suppressing the production of methane in the steaming reactor.

Koutsoukos, Elias P. (Los Angeles, CA)

1989-01-01T23:59:59.000Z

360

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 Ā· Estimates of methane emissions from natural gas production , from academic in assumptions in estimating emissions Ā· Measured data for some sources of methane emissions during natural gas

Lightsey, Glenn

Note: This page contains sample records for the topic "digester gases 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

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

362

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 CH4Ā­N2 and H2Ā­N2 collisions in the troposphere), whose reaction with carbon grains or carbon dioxide in the crustal pores produces methane gas

Atreya, Sushil

363

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

364

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 Ā­ 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

MĆ¼hlemann, Oliver

365

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....................................................................................................

366

Pilot-scale anaerobic co-digestion of municipal biomass waste and waste activated sludge in China: Effect of organic loading rate  

SciTech Connect (OSTI)

Highlights: Black-Right-Pointing-Pointer Co-digestion of municipal biomass waste (MBW) and waste activated sludge (WAS) was examined on a pilot-scale reactor. Black-Right-Pointing-Pointer System performance and stability under OLR of 1.2, 2.4, 3.6, 4.8, 6.0 and 8.0 kg VS (m{sup 3} d){sup -1} were analyzed. Black-Right-Pointing-Pointer A maximum methane production rate of 2.94 m{sup 3} (m{sup 3} d){sup -1} was achieved at OLR of 8.0 kg VS (m{sup 3} d){sup -1} and HRT of 15d. Black-Right-Pointing-Pointer With the increasing OLRs, pH values, VS removal rate and methane concentration decreased and VFA increased. Black-Right-Pointing-Pointer The changing of biogas production rate can be a practical approach to monitor and control anaerobic digestion system. - Abstract: The effects of organic loading rate on the performance and stability of anaerobic co-digestion of municipal biomass waste (MBW) and waste activated sludge (WAS) were investigated on a pilot-scale reactor. The results showed that stable operation was achieved with organic loading rates (OLR) of 1.2-8.0 kg volatile solid (VS) (m{sup 3} d){sup -1}, with VS reduction rates of 61.7-69.9%, and volumetric biogas production of 0.89-5.28 m{sup 3} (m{sup 3} d){sup -1}. A maximum methane production rate of 2.94 m{sup 3} (m{sup 3} d){sup -1} was achieved at OLR of 8.0 kg VS (m{sup 3} d){sup -1} and hydraulic retention time of 15 days. With increasing OLRs, the anaerobic reactor showed a decrease in VS removal rate, average pH value and methane concentration, and a increase of volatile fatty acid concentration. By monitoring the biogas production rate (BPR), the anaerobic digestion system has a higher acidification risk under an OLR of 8.0 kg VS (m{sup 3} d){sup -1}. This result remarks the possibility of relating bioreactor performance with BPR in order to better understand and monitor anaerobic digestion process.

Liu Xiao, E-mail: liuxiao07@mails.tsinghua.edu.cn [School of Environment, Tsinghua University, Beijing 100084 (China); Wang Wei; Shi Yunchun; Zheng Lei [School of Environment, Tsinghua University, Beijing 100084 (China); Gao Xingbao [Chinese Research Academy of Environmental Sciences, Beijing 100012 (China); Qiao Wei [State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249 (China); Zhou Yingjun [Department of Urban and Environmental Engineering, Graduate School of Engineering, Kyoto University, Katsura, Nisikyo-ku, Kyoto 615-8540 (Japan)

2012-11-15T23:59:59.000Z

367

Chemical Properties of the Rare Gases  

Science Journals Connector (OSTI)

... of argon of about 100 atm. I have already shown by an independent method1 that radon, too, forms a hydrate which is much more stable than those of other rare ... , forms a hydrate which is much more stable than those of other rare gases. Radon is easily held by crystals of sulphur dioxide hydrates, when they are formed from ...

B. A. NIKITIN

1937-10-09T23:59:59.000Z

368

New instruments for measuring landfill gases  

Science Journals Connector (OSTI)

New instruments for measuring landfill gases ... The legislation mandates that landfill operators monitor more than 1200 active sites for specific pollution products. ... According to Varian, the instrumentation systems can be adapted easily to meet landfill testing requirements that might be enacted in states other than California. ...

RUDY BAUM

1988-02-01T23:59:59.000Z

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 Ć— 600 pixels. Go to page 1 2 3 4 5 Go! next page ā†’ next page ā†’ Full resolution ā€ˇ(1,218 Ć— 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 Ć— 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? Ā· High concentrations possible (>1000High Temperature Solar Splitting of Methane to Hydrogen and Carbon High Temperature Solar Splitting and worldwide) Ā­ Sufficient to power the world (if we choose to) Ā· 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

Ethanol and Methane Production from Oil Palm Frond by Two Stage SSF  

Science Journals Connector (OSTI)

Abstract A two step, included process producing ethanol from oil palm fronts (OPF) by two-stage simultaneous saccharification and Saccharomyces cerevisiae fermentation followed by anaerobic digestion of its effluent to produce methane was investigated. OPF was soaked in dilute sulfuric acid, hydrogen peroxide and water consequently pretreated by microwave for preparing of cellulose and followed by simultaneous saccharification and fermentation. The result indicated OPF soaking in water gave a maximal ethanol yield was 0.32 g-ethanol/g-glucose which was 62.75% of the ethanol theoretical yield (0.51g-ethanol/g-glucose). The effluent from the ethanol production process was used to produce methane with the yield of 514 ml CH4/g VS added. Therefore, soaking in water and microwave co-pretreatment could helpful due to its low toxicity and low corrosion compare to sulfuric acid and hydrogen peroxide which improves the efficiency of enzymatic hydrolysis. The maximum energy output of the process (745 kWh/ ton of OPF) was about 72% of the energy contributed by cellulose fraction, contained in the oil palm frond.

Tussanee Srimachai; Veerasak Thonglimp; Sompong O-Thong

2014-01-01T23:59:59.000Z

379

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

380

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.

Note: This page contains sample records for the topic "digester gases 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

Influence of bed materials on methanogenic characteristics and immobilized microbes in anaerobic digester  

Science Journals Connector (OSTI)

This paper reports and discusses the effects of bed materials on the performance of methanogenic fluidized bed reactors with acetic acid as the sole organic substrate. Four bed materials (carbon filter, rock wool, loofah sponge and polyurethane foam) were evaluated and compared for their methanogenic characteristics and immobilized microbes. The present results indicated that the characteristics of the bed materials for immobilization had a significant influence on the methane production. The loofah sponge and polyurethane foam were suggested to be suitable for the bed material in anaerobic digestion. The best methane yield was obtained from the loofah reactor among the four kinds of bed materials. The main cellular morphologies present in the biofilms of the four different materials on the colonization were observed using scanning electron microscopy. The microphotographs indicated that the biofilm was primarily composed of coccus, diplococci-shaped Methanosarcina-like cells, long rods of Methanobacterium and coccobacillus of Methanobrevibacter-like bacteria. The morphologies observed from the microscopic analysis indicated that the different bed materials could provide specific conditions for the adherence of distinct microorganism types. Furthermore, a 16S rRNA phylogenetic analysis was conducted to compare the immobilized archaeal population. The results of the 16S rRNA phylogenetic analysis indicated that the major immobilized methanogens were Methanobacterium formicicum, Methanosarcina barkeri and Methanosarcina mazei in all the bed materials. A similar clone distribution was observed with the loofah sponge and the carbon felt.

Yingnan Yang; Chika Tada; Md Shohidullah Miah; Kenichiro Tsukahara; Tatsuo Yagishita; Shigeki Sawayama

2004-01-01T23:59:59.000Z

382

Steam-Methane Reformer Kinetic Computer Model with Heat Transfer and Geometry Options  

SciTech Connect (OSTI)

A kinetic computer model of a steam/methane reformer has been developed as a design and analytical tool for a fuel cell system's fuel conditioner. This model has reaction, geometry, flow arrangement, and heat transfer options. Model predictions have been compared to previous experimental data, and close agreement was obtained. Initially, the Leva-type, packed-bed, heat transfer correlations were used. However, calculations based upon the reacting, reformer gases indicate a considerably higher heat transfer coefficient for this reforme design. Data analysis from similar designs in the literature also shows this phenomenon. This is thought to be reaction-induced effect, brought about by the changing of gas composition, the increased gas velocity, the lower catalyst temperature during reaction, and the higher thermal and reaction gradients involved in compact fuel cell reformer designs. Future experimental work is planned to verify the model's predictions further.

Murray, A.P.; Snyder, T.S.

1985-04-01T23:59:59.000Z

383

Mathematical modeling and heat transfer experiments for an annular bed methane-steam reformer  

SciTech Connect (OSTI)

A new type of catalytic reactor has been proposed for conducting endothermic chemical reactions. The reactor catalyst bed is in the form of a tubular reactor with an annular cross-section. Heat is supplied to the catalyst bed by countercurrent flowing gases on opposite sides of the annulus walls. This study consisted of the development of a mathematical model to describe the performance of an annular bed reactor employing the methane-steam reforming reaction for the production of hydrogen. The model is two-dimensional, and predicts both axial and radial temperature and concentration profiles throughout the reactor. The model was used to perform parameter sensitivity studies, reactor size optimization, and reactor scaleup.

Summers, W.A.

1986-01-01T23:59:59.000Z

384

Transport of Gases in Carbon Molecular Sieve Membranes by Multinuclear...  

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

"difficult" separations of gas mixtures such as carbon dioxide methane and ethane ethylene separations. While there are many reports on macroscopic transport properties of CMS...

385

Gas Cleaning Methods for Ambient Air and Compressed Gases  

Science Journals Connector (OSTI)

Cleaning air or compressed gases in cleanroom installations requires removal of particulate and/or ... The technology used for cleaning gases for the cleanroom is derived from processes long used in ... fossil fu...

Alvin Lieberman

1992-01-01T23:59:59.000Z

386

Perdido LF-Gase to Electricity | Department of Energy  

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

Perdido LF-Gase to Electricity Perdido LF-Gase to Electricity This presentation was given at the July 17, 2012, Community Renewable Energy Deployment webinar on successful landfill...

387

BOC Lienhwa Industrial Gases BOCLH | Open Energy Information  

Open Energy Info (EERE)

BOC Lienhwa Industrial Gases BOCLH BOC Lienhwa Industrial Gases BOCLH Jump to: navigation, search Name BOC Lienhwa Industrial Gases (BOCLH) Place Taipei, Taiwan Sector Solar Product BOCLH is a joint venture between the Lien Hwa Industrial Corporation and the BOC Group in the United Kingdom and produces high-purity gases used in solar component production. References BOC Lienhwa Industrial Gases (BOCLH)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. BOC Lienhwa Industrial Gases (BOCLH) is a company located in Taipei, Taiwan . References ā†‘ "BOC Lienhwa Industrial Gases (BOCLH)" Retrieved from "http://en.openei.org/w/index.php?title=BOC_Lienhwa_Industrial_Gases_BOCLH&oldid=342956

388

Digestion Experiments With Texas Feeding Stuffs.  

E-Print Network [OSTI]

477-514-15m TEXAS AGRICULTURAL EXPERIMENT STATION BULLETIN NO. 166. MAK, 1914 DIVISION OF CHEMISTRY Digestion Experiments With Texas Feeding Stuffs Digeisston oExxprp gmWmhETa FdWSEu oEfTm1a ep2Wu VON BOECKMANN-JONES CO., PRINTERS, AUSTIN... EXPERIMENTS WITH TEXAS FEEDING STUFFS B Y Gr. S. PRAPS., P H . D., Chemist. This bulletin contains the results of digestion tests with the ordi? nary fodder groups of certain feeding stuffs. Other results have been published in Bulletin 149...

Fraps, G. S.

1914-01-01T23:59:59.000Z

389

Digestion Experiments on Men with Cottonseed Meal.  

E-Print Network [OSTI]

in Charge W . Z. M i l l e r , B . S., Scientific Assistant , Animal Husbandman SUBSTATION NO . 6 : Krum, Denton County D IV ISION OF EN TOM OLOGY T - W - B u e l l , B . S., Superintendent W ilm on N ew e ll , M . S., Entomologist in SUBSTATION... beings. Mendel and Fine (J . Biol. Chem. I I , I ) fed cottonseed flour to dogs and found that 71.6 per cent of the proteins were digested, on an average, and when meat was fed to the same animals that 91.0 per cent protein was digested. Since...

Rather, J. B. (James Burness)

1913-01-01T23:59:59.000Z

390

Method for enhancing microbial utilization rates of gases using perfluorocarbons  

DOE Patents [OSTI]

A method of enhancing the bacterial reduction of industrial gases using perfluorocarbons (PFCs) is disclosed. Because perfluorocarbons (PFCs) allow for a much greater solubility of gases than water does, PFCs have the potential to deliver gases in higher concentrations to microorganisms when used as an additive to microbial growth media thereby increasing the rate of the industrial gas conversion to economically viable chemicals and gases.

Turick, Charles E. (Idaho Falls, ID)

1997-01-01T23:59:59.000Z

391

A new temperature controlled digester for anaerobic digestion for biogas production  

Science Journals Connector (OSTI)

Various types of insulating composite materials were used on ceramic digesters for the control of temperature. Maintenance of temperature is highlighted in this paper. The above types of digesters can adequately control the temperature, especially in the winter season. The results of extensive experimental and theoretical studies have been cited in this paper. This work is beneficial for those plants which are generally in higher altitude stations with low atmospheric temperature, like Leh (India). These types of digesters were found to be very useful for the production of biogas, especially from aquatic biomass like water hyacinth.

Upama Misra; Sanjay Singh; Amarika Singh; G.N. Pandey

1992-01-01T23:59:59.000Z

392

Economic implications of anaerobic digesters on dairy farms in Texas  

E-Print Network [OSTI]

-selling price, digesters are less economically feasible than current waste management strategies, lagoons, even after considering potential environmental penalties. However, selling electricity and capturing by-product heat for cost savings makes the digester...

Jackson, Randy Scott, Jr.

2007-09-17T23:59:59.000Z

393

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

394

Biomass Anaerobic Digestion Facilities and Biomass Gasification Facilities (Indiana)  

Broader source: Energy.gov [DOE]

The Indiana Department of Environmental Management requires permits before the construction or expansion of biomass anaerobic digestion or gasification facilities.

395

SO2-induced stability of Ag-alumina catalysts in the SCR of NO with methane  

SciTech Connect (OSTI)

We report on a stabilization effect on the structure and activity of Ag/Al2O3 for the selective catalytic reduction (SCR) of NOx with CH4 imparted by the presence of SO2 in the exhaust gasmixture. The reaction is carried out at temperature above 600 8C to keep the surface partially free of sulfates. In SO2-free gases, catalyst deactivation is fast and measurable at these temperatures. Time-resolved TEM analyses of used samples have determined that deactivation is due to sintering of silver from well-dispersed clusters to nanoparticles to micrometer-size particles with time-on-stream at 625 8C. However, sintering of silver was dramatically suppressed by the presence of SO2 in the reaction gas mixture. The structural stabilization by SO2 was accompanied by stable catalyst activity for the NO reduction to N2. The direct oxidation of methane was suppressed, thus the methane selectivity was improved in SO2-laden gas mixtures. In tests with high-content silver alumina with some of the silver present in metallic form, an increase in the SCR activity was found in SO2-containing gas mixtures. This is attributed to redispersion of the silver particles by SO2, an unexpected finding. The catalyst performance was reversible over many cycles of operation at 625 8C with the SO2 switched on and off in the gas mixture.

She, Xiaoyan; Flytzani-Stephanopoulos, Maria; Wang, Chong M.; Wang, Yong; Peden, Charles HF

2009-04-29T23:59:59.000Z

396

Adsorption of methane and carbon dioxide on gas shale and pure mineral samples  

Science Journals Connector (OSTI)

Abstract We have measured methane and carbon dioxide adsorption isotherms at 40 °C on gas shale samples from the Barnett, Eagle Ford, Marcellus and Montney reservoirs. Carbon dioxide isotherms were included to assess its potential for preferential adsorption, with implications for its use as a fracturing fluid and/or storage in depleted shale reservoirs. To better understand how the individual mineral constituents that comprise shales contribute to adsorption, measurements were made on samples of pure carbon, illite and kaolinite as well. We were able to successfully fit all adsorption data for both gases in accordance with a Langmuir isotherm model. Our results show carbon dioxide to have approximately 2–3 times the adsorptive capacity of methane in both the pure mineral constituents and actual shale samples. In addition to obvious microstructural and compositional differences between real rocks and pure minerals, we hypothesize that water adsorption plays an important role in regulating surface area availability for other molecules to adsorb. The resultant volumetric swelling strain was also measured as a function of pressure/adsorption. We observe both clay and pure carbon to swell an amount that is approximately linearly proportional to the amount of adsorption.

Robert Heller; Mark Zoback

2014-01-01T23:59:59.000Z

397

Digestibility and Production Coefficients of Hog Feeds.  

E-Print Network [OSTI]

LIDEARY, A t% !*I COLLEGE, CA%!PUS. TEXAS AGRICULTURAL EXPERIMENT STATiON A. B. CONNER, DIRECTOR COLLEGE STATION, BRAZOS COUNTY, TEXAS 7 BULLETIN NO. 454 SEPTEMBER, 1932 Digestibility and Production Coefficients of Hog Feeds AGRICULTURAI... .................................................................. 16 Compositjon and feeding values of pig feeds 17 Standards for pig feeding ----__.-_._----------- 1 22 Summary ----__..-----_--_-.---.--------------------- 23 Ref erenczs --------------.---------- 24 BULLETIN NO. 454 SEPTEMBER, 1932...

Fraps, G. S. (George Stronach)

1932-01-01T23:59:59.000Z

398

Digestion Experiments with Texas Hays and Fodders.  

E-Print Network [OSTI]

. T. MILNER. .College Station I I STATION STAFF. I ............................................. B. YOUNGIILOOD, M S. .Director ......................................... M. FRANCIS, D. V. S.. Veterinarian.... B. Gottlieb, and T. L. Ogier. Special mention should be made of the services of J. B. Rather. TABLE +COMPOSITION OF FEEDING STUFFS AND RESIDUES FROM DIGESTION ZSPERTMENTS. Nitro- Pro- Ether Crude tein. 1 - 1 fiber. I frr$: TVater. 1 Labora...

Fraps, G. S. (George Stronach)

1912-01-01T23:59:59.000Z

399

High-pressure solubility of light gases in heavy n-alkanes from a predictive equation of state: Incorporating Henry's law constant into binary interaction parameter  

Science Journals Connector (OSTI)

Abstract Using fugacity coefficient of a cubic equation of state, Henry's law constant of a solute in a solvent is incorporated into binary interaction parameter of the classical attractive parameter mixing rule. The developed equation is a function of temperature. The binary interaction parameter is evaluated by pure component critical properties and acentric factors of the solute and the solvent and the Henry's law constant of the solute in the solvent. The developed model accurately describes the solubility of gases including methane, ethane, nitrogen, carbon dioxide and hydrogen sulphide in heavy n-alkanes from low to high pressure for wide range of temperature. The solubility of methane and carbon dioxide in water is also predicted adequately.

Khashayar Nasrifar; Nejat Rahmanian

2014-01-01T23:59:59.000Z

400

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

Note: This page contains sample records for the topic "digester gases 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

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

402

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

403

NETL: Methane Hydrates - DOE/NETL Projects  

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

Ā– Formation and Dissociation of Methane Hydrates Last Reviewed 07/7/2011 Ā– 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 Ā– NETL Office of Research & Development Jeong Choi Ā– Oak Ridge Institute for Science and Education Jongho Cha-Virginia Polytech Institute Project Location National Energy Technology Laboratory - Morgantown, West Virginia

404

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 Ā– 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

405

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

406

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

407

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

408

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

409

Adsorption and Separation of Light Gases on an Amino-Functionalized Metal–Organic Framework: An Adsorption and In Situ XRD Study  

SciTech Connect (OSTI)

The NH{sub 2}-MIL-53(Al) metal-organic framework was studied for its use in the separation of CO{sub 2} from CH{sub 4}, H{sub 2}, N{sub 2} C{sub 2}H{sub 6} and C{sub 3}H{sub 8} mixtures. Isotherms of methane, ethane, propane, hydrogen, nitrogen, and CO{sub 2} were measured. The atypical shape of these isotherms is attributed to the breathing properties of the material, in which a transition from a very narrow pore form to a narrow pore form and from a narrow pore form to a large pore form occurs, depending on the total pressure and the nature of the adsorbate, as demonstrated by in-situ XRD patterns measured during adsorption. Apart from CO{sub 2}, all tested gases interacted weakly with the adsorbent. As a result, they are excluded from adsorption in the narrow pore form of the material at low pressure. CO{sub 2} interacted much more strongly and was adsorbed in significant amounts at low pressure. This gives the material excellent properties to separate CO{sub 2} from other gases. The separation of CO{sub 2} from methane, nitrogen, hydrogen, or a combination of these gases has been demonstrated by breakthrough experiments using pellets of NH{sub 2}-MIL-53(Al). The effect of total pressure (1-30 bar), gas composition, temperature (303-403 K) and contact time has been examined. In all cases, CO{sub 2} was selectively adsorbed, whereas methane, nitrogen, and hydrogen nearly did not adsorb at all. Regeneration of the adsorbent by thermal treatment, inert purge gas stripping, and pressure swing has been demonstrated. The NH{sub 2}-MIL-53(Al) pellets retained their selectivity and capacity for more than two years.

Couck S.; Stavitski E.; Gobehiya, E.; Kirschhock, C.E.A.; Serra-Crespo, P.; Juan-Alcaniz, J.; Martinez Joaristi, A.; Gascon, J.; Kapteijn, F.; Baron, G. V.; Denayer J.F.M.

2012-02-29T23:59:59.000Z

410

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.

411

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

412

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

413

International Cooperation in Methane Hydrates | Department of Energy  

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

Oil & Gas Ā» Methane Hydrate Ā» Oil & Gas Ā» Methane Hydrate Ā» 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

414

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

415

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

416

PHASE BEHAVIOR OF LIGHT GASES IN HYDROCARBON AND AQUEOUS SOLVENTS  

SciTech Connect (OSTI)

Under previous support from the Department of Energy, an experimental facility has been established and operated to measure valuable vapor-liquid equilibrium data for systems of interest in the production and processing of coal fluids. To facilitate the development and testing of models for prediction of the phase behavior for such systems, we have acquired substantial amounts of data on the equilibrium phase compositions for binary mixtures of heavy hydrocarbon solvents with a variety of supercritical solutes, including hydrogen, methane, ethane, carbon monoxide, and carbon dioxide. The present project focuses on measuring the phase behavior of light gases and water in Fischer-Tropsch (F-T) type solvents at conditions encountered in indirect liquefaction processes and evaluating and developing theoretically-based correlating frameworks to predict the phase behavior of such systems. Specific goals of the proposed work include (a) developing a state-of-the-art experimental facility to permit highly accurate measurements of equilibrium phase compositions (solubilities) of challenging F-T systems, (b) measuring these properties for systematically-selected binary, ternary and molten F-T wax mixtures to provide critically needed input data for correlation development, (c) developing and testing models suitable for describing the phase behavior of such mixtures, and (d) presenting the modeling results in generalized, practical formats suitable for use in process engineering calculations. During the present period, the Park-Gasem-Robinson (PGR) equation of state (EOS) has been modified to improve its volumetric and equilibrium predictions. Specifically, the attractive term of the PGR equation was modified to enhance the flexibility of the model, and a new expression was developed for the temperature dependence of the attractive term in this segment-segment interaction model. The predictive capability of the modified PGR EOS for vapor pressure, and saturated liquid and vapor densities was evaluated for selected normal paraffins, normal alkenes, cyclo-paraffins, light aromatics, argon, carbon dioxide and water. The generalized EOS constants and substance-specific characteristic parameters in the modified PGR EOS were obtained from the pure component vapor pressures, and saturated liquid and vapor molar volumes. The calculated phase properties were compared to those of the Peng-Robinson (PR), the simplified-perturbed-hard-chain theory (SPHCT) and the original PGR equations. Generally, the performance of the proposed EOS was better than the PR, SPHCT and original PGR equations in predicting the pure fluid properties (%AAD of 1.3, 2.8 and 3.7 for vapor pressure, saturated liquid and vapor densities, respectively).

KHALED A.M. GASEM; ROBERT L. ROBINSON, JR.

1998-08-31T23:59:59.000Z

417

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

418

Community-Scale Anaerobic Digesters Webinar | Department of Energy  

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

Community-Scale Anaerobic Digesters Webinar Community-Scale Anaerobic Digesters Webinar Community-Scale Anaerobic Digesters Webinar April 16, 2013 1:00PM MDT Webinar This free webinar will be held on April 16, 2013, from 1-2:15 p.m. Mountain Daylight Time. It will provide information on San Jose, California's, commercial-scale, high solids dry fermentation anaerobic digestion system, and the Forest County Potawatomi Community's anaerobic digester project. Implementing Anaerobic Digestion in San Jose's Integrated Processing Infrastructure This presentation will provide background on San Jose, California's, leading-edge program using the nation's first commercial-scale, high solids dry fermentation anaerobic digestion system to process commercial organics from more than 8,000 businesses in the city. Phase one of the Zero Waste

419

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

420

,"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...

Note: This page contains sample records for the topic "digester gases 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

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

422

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

423

,"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...

424

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

425

,"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...

426

,"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...

427

,"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...

428

,"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...

429

,"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...

430

,"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...

431

,"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...

432

,"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...

433

,"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...

434

,"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...

435

,"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"...

436

,"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...

437

,"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...

438

,"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...

439

,"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...

440

,"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"...

Note: This page contains sample records for the topic "digester gases 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

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...

442

,"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...

443

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...

444

,"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...

445

,"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...

446

,"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...

447

,"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...

448

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...

449

,"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"...

450

,"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...

451

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

452

,"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...

453

,"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"...

454

,"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...

455

,"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...

456

,"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...

457

,"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...

458

,"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...

459

,"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...

460

,"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...

Note: This page contains sample records for the topic "digester gases 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

,"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...

462

,"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...

463

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...

464

,"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"...

465

,"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...

466

,"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...

467

,"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...

468

,"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...

469

,"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...

470

,"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"...

471

,"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...

472

,"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...

473

,"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...

474

,"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...

475

,"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...

476

,"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...

477

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...

478

,"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...

479

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

480

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...

Note: This page contains sample records for the topic "digester gases 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

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

482

Methane production using resin-wafer electrodeionization  

DOE Patents [OSTI]

The present invention provides an efficient method for creating natural gas including the anaerobic digestion of biomass to form biogas, and the electrodeionization of biogas to form natural gas and carbon dioxide using a resin-wafer deionization (RW-EDI) system. The method may be further modified to include a wastewater treatment system and can include a chemical conditioning/dewatering system after the anaerobic digestion system. The RW-EDI system, which includes a cathode and an anode, can either comprise at least one pair of wafers, each a basic and acidic wafer, or at least one wafer comprising of a basic portion and an acidic portion. A final embodiment of the RW-EDI system can include only one basic wafer for creating natural gas.

Snyder, Seth W; Lin, YuPo; Urgun-Demirtas, Meltem

2014-03-25T23:59:59.000Z

483

Efficieny handling effluent gases through chemical scrubbing  

SciTech Connect (OSTI)

This paper is presented as an information source for efficiencies of chemical scrubbing. In it, we will discuss the specific problems of scrubbing silane, disilane, diborane, phosphine, hydrogen selenide and arsine. We will explain the scrubber dynamics, gases and flow rates used along with liquid mediums. The equipment and procedures used for testing, as well as the determination of the results, will be discussed. We intend to give examples of possible reactions and documentation of our efficiencies. Installation and maintenance will be touched, as well as our experiments into accidental catastrophic releases. From all of this we will derive conclusions as to the best possible means of wet chemical scrubbing.

Herman, T.; Soden, S.

1988-07-15T23:59:59.000Z

484

Heat conduction in relativistic neutral gases revisited  

E-Print Network [OSTI]

The kinetic theory of dilute gases to first order in the gradients yields linear relations between forces and fluxes. The heat flux for the relativistic gas has been shown to be related not only to the temperature gradient but also to the density gradient in the representation where number density, temperature and hydrodynamic velocity are the independent state variables. In this work we show the calculation of the corresponding transport coefficients from the full Boltzmann equation and compare the magnitude of the relativistic correction.

A. L. Garcia-Perciante; A. R. Mendez

2010-09-30T23:59:59.000Z

485

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

486

Crab digestive phospholipase: A new invertebrate member  

Science Journals Connector (OSTI)

Crab digestive phospholipase (CDPL) was purified from the hepatopancreas of Carcinus mediterraneus crabs. Homogeneous enzyme was obtained after two chromatography steps: anion exchange and size exclusion HPLC column. Homogeneous CDPL has a molecular mass of 14 kDa as determined by SDS/PAGE analysis. Unlike known digestive phospholipases like porcine PLA2 (PPPL), CDPL displayed its maximal activity at 50 °C and not at 37 °C. A specific activity of 40 U/mg for the purified CDPL was measured using PC as substrate under optimal conditions (pH 8 and 50 °C) in the presence of 8 mM sodium deoxycholate (NaDC) and 10 mM CaCl2. In contrast to PPPL, purified CDPL was completely inactivated at 60 °C. The N-terminal sequence was determined by automatic Edman degradation. No similarity between 12 N-terminal amino acid residues of CDPL was found with those of known digestive phospholipases. CDPL appears to be a new member of invertebrate phospholipases, and it is potentially useful for treat phospholipid-rich industrial effluents, or to synthesize useful chemical compounds which can be used in the food industry.

Slim Cherif; Abir Ben Bacha; Yassine Ben Ali; Habib Horchani; Wiem Rekik; Youssef Gargouri

2010-01-01T23:59:59.000Z

487

Method of digesting an explosive nitro compound  

DOE Patents [OSTI]

The present invention is a process wherein bleaching oxidants are used to digest explosive nitro compounds. The process has an excellent reaction rate for digesting explosives and operates under multivariate conditions. Reaction solutions may be aqueous, non-aqueous or a combination thereof, and can also be any pH, but preferably have a pH between 2 and 9. The temperature may be ambient as well as any temperature above which freezing of the solution would occur and below which any degradation of the bleaching oxidant would occur or below which any explosive reaction would be initiated. The pressure may be any pressure, but is preferably ambient or atmospheric, or a pressure above a vapor pressure of the aqueous solution to avoid boiling of the solution. Because the bleaching oxidant molecules are small, much smaller than an enzyme molecule for example, they can penetrate the microstructure of plastic explosives faster. The bleaching oxidants generate reactive hydroxyl radicals, which can destroy other organic contaminants, if necessary, along with digesting the explosive nitro compound.

Shah, Manish M. (Richland, WA)

2000-01-01T23:59:59.000Z

488

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

489

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,...

490

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...

491

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,...

492

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...

493

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

494

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,...

495

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...

496

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...

497

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...

498

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

499

The greenhouse gases HFCs, PFCs Danish consumption and emissions, 2007  

E-Print Network [OSTI]

The greenhouse gases HFCs, PFCs and SF6 Danish consumption and emissions, 2007 Tomas Sander Poulsen AND EMISSION OF F-GASES 7 1.1.1 Consumption 7 1.1.2 Emission 7 1.1.3 Trends in total GWP contribution from F 21 4 EMISSION OF F-GASES 23 4.1.1 Emissions of HFCs from refrigerants 23 4.1.2 Emissions of HFCs from

500

Suspended two-dimensional electron and hole gases  

SciTech Connect (OSTI)

We report on the fabrication of fully suspended two-dimensional electron and hole gases in III-V heterostructures. Low temperature transport measurements verify that the properties of the suspended gases are only slightly degraded with respect to the non-suspended gases. Focused ion beam technology is used to pattern suspended nanostructures with minimum damage from the ion beam, due to the small width of the suspended membrane.

Kazazis, D.; Bourhis, E.; Gierak, J.; Gennser, U. [Laboratoire de Photonique et de Nanostructures, CNRS-LPN, Route de Nozay, 91460 Marcoussis (France); Bourgeois, O. [Institut Néel, CNRS-UJF, BP 166, 38042 Grenoble Cedex 9 (France); Antoni, T. [Laboratoire de Photonique et de Nanostructures, CNRS-LPN, Route de Nozay, 91460 Marcoussis, France and Laboratoire Kastler Brossel, Université Pierre et Marie Curie, 4 Place Jussieu, 75005 Paris (France)

2013-12-04T23:59:59.000Z