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Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

SRD 134 Hydrogen Sulfide  

Science Conference Proceedings (OSTI)

> Return to SRD 134, Index of Semiconductor Process Gases. HYDROGEN SULFIDE. MW [1]. 34.082. NBP [1]. 212.88 K. TP [1]. 187.7 K. H 2 S. Pc [1 ...

2012-07-27T23:59:59.000Z

2

Hydrogen Sulfide Dispersion Consequences Analysis in Different Wind Speeds: A CFD Based Approach  

Science Conference Proceedings (OSTI)

Hydrogen sulfide (h2s) leakage and dispersion from a sulfide recycle installation in different wind speeds are simulated by implementing a 3D Computational Fluid Dynamics (CFD) model. H2s concentrations of monitor points which represent dispersion contours ... Keywords: CFD, hydrogen Sulfide, dispersion, concenquences analysis, different wind speeds

Bo Zhang; Guo-ming Chen

2009-10-01T23:59:59.000Z

3

Molecular Cell Hydrogen Sulfide-Linked Sulfhydration  

E-Print Network (OSTI)

Molecular Cell Article Hydrogen Sulfide-Linked Sulfhydration of NF-kB Mediates Its Antiapoptotic@jhmi.edu DOI 10.1016/j.molcel.2011.10.021 SUMMARY Nuclear factor kB (NF-kB) is an antiapoptotic tran- scription factor. We show that the antiapoptotic actions of NF-kB are mediated by hydrogen sulfide (H2S

Dong, Xinzhong

4

A novel and cost-effective hydrogen sulfide removal technology using tire derived rubber particles.  

E-Print Network (OSTI)

??Hydrogen sulfide (H2S) is corrosive, toxic, and produced during the anaerobic digestion process at wastewater treatment plants. Tire derived rubber particles (TDRPTM) and other rubber… (more)

Siefers, Andrea Mary

2010-01-01T23:59:59.000Z

5

Removal of Hydrogen Sulfide in a Biotrickling Filter under Extremely Acidic Conditions  

Science Conference Proceedings (OSTI)

Hydrogen sulfide (H2S), an extremely corrosive and toxic gas, was commonly generated by urban treatment plants, gas and oil refineries, paper and pulp industries and so on. Biofiltration, which was considered as cost-effective and environment-friendly, ... Keywords: H2S, biotrickling filter, biodegradation, removal efficiency, elimination capacity

Jing Chen

2010-12-01T23:59:59.000Z

6

Geothermal hydrogen sulfide removal  

DOE Green Energy (OSTI)

UOP Sulfox technology successfully removed 500 ppM hydrogen sulfide from simulated mixed phase geothermal waters. The Sulfox process involves air oxidation of hydrogen sulfide using a fixed catalyst bed. The catalyst activity remained stable throughout the life of the program. The product stream composition was selected by controlling pH; low pH favored elemental sulfur, while high pH favored water soluble sulfate and thiosulfate. Operation with liquid water present assured full catalytic activity. Dissolved salts reduced catalyst activity somewhat. Application of Sulfox technology to geothermal waters resulted in a straightforward process. There were no requirements for auxiliary processes such as a chemical plant. Application of the process to various types of geothermal waters is discussed and plans for a field test pilot plant and a schedule for commercialization are outlined.

Urban, P.

1981-04-01T23:59:59.000Z

7

Removing hydrogen sulfide from a gas  

SciTech Connect

The hydrogen sulfide concentration of a gas of relatively higher hydrogen sulfide concentration is reduced by introducing the gas to a fragmented permeable mass of oil shale for contacting the oil shale in the substantial absence of free oxygen. This yields a gas with relatively lower hydrogen sulfide concentration which is withdrawn from the fragmented permeable mass of oil shale.

Compton, L.E.

1978-10-24T23:59:59.000Z

8

Tests for Hydrogen Cyanide and Hydrogen Sulfide  

SciTech Connect

A potential source of dangerous concentrations of hydrogen cyanide exists in the plating room of the Machine Shop where open plating baths containing cyanide salts are maintained and where solid cyanide salts are stored. Also the use of hydrogen sulfide in certain steps of the waste disposal process has lead to noticeable and sometimes objectionable concentrations of this gas in the air of the "WD" Building. In view of the toxic properties of these two gases, it was desirable to set up suitable tests to determine the actual concentrations present in the air of the respective working areas.

Joy, E. F.

1949-08-24T23:59:59.000Z

9

PRODUCTION OF HYDROGEN BY SUPERADIABATIC DECOMPOSITION OF HYDROGEN SULFIDE  

E-Print Network (OSTI)

and the membrane systems selected, additional equipment such as knockout drums, coalescing filters, and guard beds far and modeling predictions is quite reasonable. Methane 20% H2S/ 80%N2 Air MFC MFC MFC Proceedings of the 2002 U.S. DOE Hydrogen Program Review NREL/CP-610-32405 #12;MFC-3 MFC-1 MFC-2 N2 H2S O2

10

Hydrogen Sulfide, Oil and Gas, and People’s Health By  

E-Print Network (OSTI)

2. Hydrogen Sulfide in the Environment.................................................................................... 4 3. Hydrogen Sulfide and Oil and Gas......................................................................................... 5

Lana Skrtic

2006-01-01T23:59:59.000Z

11

Biogas Purification: H2S Removal using Biofiltration.  

E-Print Network (OSTI)

??Biogas, composed principally of methane, has limited use in energy generation due to the presence of hydrogen sulphide (H2S). Biogas cannot be burned directly in… (more)

Fischer, Mary Elizabeth

2010-01-01T23:59:59.000Z

12

Hydrogen and sulfur recovery from hydrogen sulfide wastes  

DOE Patents (OSTI)

A process is described for generating hydrogen and elemental sulfur from hydrogen sulfide waste in which the hydrogen sulfide is [dis]associated under plasma conditions and a portion of the hydrogen output is used in a catalytic reduction unit to convert sulfur-containing impurities to hydrogen sulfide for recycle, the process also including the addition of an ionizing gas such as argon to initiate the plasma reaction at lower energy, a preheater for the input to the reactor and an internal adjustable choke in the reactor for enhanced coupling with the microwave energy input.

Harkness, J.B.L.; Gorski, A.J.; Daniels, E.J.

1993-05-18T23:59:59.000Z

13

Hydrogen and sulfur recovery from hydrogen sulfide wastes  

DOE Patents (OSTI)

A process for generating hydrogen and elemental sulfur from hydrogen sulfide waste in which the hydrogen sulfide is associated under plasma conditions and a portion of the hydrogen output is used in a catalytic reduction unit to convert sulfur-containing impurities to hydrogen sulfide for recycle, the process also including the addition of an ionizing gas such as argon to initiate the plasma reaction at lower energy, a preheater for the input to the reactor and an internal adjustable choke in the reactor for enhanced coupling with the microwave energy input.

Harkness, John B. L. (Naperville, IL); Gorski, Anthony J. (Woodridge, IL); Daniels, Edward J. (Oak Lawn, IL)

1993-01-01T23:59:59.000Z

14

Hydrogen and sulfur production from hydrogen sulfide wastes  

DOE Green Energy (OSTI)

A new hydrogen sulfide waste-treatment process that uses microwave plasma-chemical technology is currently under development in the Soviet Union and in the United States. Whereas the present waste treatment process only recovers sulfur at best, this novel process recovers both hydrogen and sulfur. The plasma process involves dissociating hydrogen sulfide in a nonequilibrium'' plasma in a microwave or radio-frequency reactor. After the dissociation process, sulfur is condensed and sold just as is currently done. The remaining gases are purified and separated into streams containing the product hydrogen, the hydrogen sulfide to be recycled to the plasma reactor, and the process purge containing carbon dioxide and water. This process has particular implications for the petroleum refining industry, in which hydrogen is a widely used reagent and must be produced from increasingly scarce hydrocarbon resources. The modular nature of the new process may also offer economic advantages over small-scale waste treatment technologies widely used in the natural-gas industry. Laboratory-scale experiments with pure hydrogen sulfide indicate that conversions exceeding 90% are possible with appropriate reactor design and that the energy required to dissociate hydrogen sulfide is low enough for the plasma process to be economically competitive. In addition, the experiments show that typical refinery acid-gas streams are compatible with the plasma process and that all by-products can be treated with existing technology.

Harkness, J.B.L.; Doctor, R.D.

1993-01-01T23:59:59.000Z

15

Hydrogen and sulfur production from hydrogen sulfide wastes  

DOE Green Energy (OSTI)

A new hydrogen sulfide waste-treatment process that uses microwave plasma-chemical technology is currently under development in the Soviet Union and in the United States. Whereas the present waste treatment process only recovers sulfur at best, this novel process recovers both hydrogen and sulfur. The plasma process involves dissociating hydrogen sulfide in a ``nonequilibrium`` plasma in a microwave or radio-frequency reactor. After the dissociation process, sulfur is condensed and sold just as is currently done. The remaining gases are purified and separated into streams containing the product hydrogen, the hydrogen sulfide to be recycled to the plasma reactor, and the process purge containing carbon dioxide and water. This process has particular implications for the petroleum refining industry, in which hydrogen is a widely used reagent and must be produced from increasingly scarce hydrocarbon resources. The modular nature of the new process may also offer economic advantages over small-scale waste treatment technologies widely used in the natural-gas industry. Laboratory-scale experiments with pure hydrogen sulfide indicate that conversions exceeding 90% are possible with appropriate reactor design and that the energy required to dissociate hydrogen sulfide is low enough for the plasma process to be economically competitive. In addition, the experiments show that typical refinery acid-gas streams are compatible with the plasma process and that all by-products can be treated with existing technology.

Harkness, J.B.L.; Doctor, R.D.

1993-03-01T23:59:59.000Z

16

Hydrogen and Sulfur Production from Hydrogen Sulfide Wastes  

E-Print Network (OSTI)

A new hydrogen sulfide waste-treatment process that uses microwave plasma-chemical technology is currently under development in the Soviet Union and in the United States. Whereas the present waste treatment process only recovers sulfur at best, this novel process recovers both hydrogen and sulfur. The plasma process involves dissociating hydrogen sulfide in a "nonequilibrium" plasma in a microwave or radio-frequency reactor. After the dissociation process, sulfur is condensed and sold just as is currently done. The remaining gases are purified and separated into streams containing the product hydrogen, the hydrogen sulfide to be recycled to the plasma reactor, and the process purge containing carbon dioxide and water. This process has particular implications for petroleum refining industry, in which hydrogen is a widely used reagent and must be produced from increasingly scarce hydrocarbon resources. The modular nature of the new process may also offer economic advantages over small-scale waste treatment technologies widely used in the natural-gas industry. Laboratory-scale experiments with pure hydrogen sulfide indicate that conversions exceeding 90% are possible with appropriate reactor design and that the energy required to dissociate hydrogen sulfide is low enough for the plasma process to be economically competitive. In addition, the experiments show-that typical refinery acid-gas streams are compatible with the plasma process and that all by-products can be treated with existing technology.

Harkness, J.; Doctor, R. D.

1993-03-01T23:59:59.000Z

17

Method for direct production of carbon disulfide and hydrogen from hydrocarbons and hydrogen sulfide feedstock  

DOE Patents (OSTI)

A method for converting hydrocarbons and hydrogen sulfide to carbon disulfide and hydrogen is provided comprising contacting the hydrocarbons and hydrogen sulfide to a bi-functional catalyst residing in a controlled atmosphere for a time and at a temperature sufficient to produce carbon disulfide and hydrogen. Also provided is a catalyst for converting carbon sulfides and hydrogen sulfides to gasoline range hydrocarbons comprising a mixture containing a zeolite catalyst and a hydrogenating catalyst.

Miao, Frank Q.; Erekson, Erek James

1998-12-01T23:59:59.000Z

18

Micro-aeration for hydrogen sulfide removal from biogas.  

E-Print Network (OSTI)

??The presence of sulfur compounds (e.g. protein, sulfate, thiosulfate, sulfite, etc.) in the feed stream generates highly corrosive and odorous hydrogen sulfide during anaerobic digestion.… (more)

Duangmanee, Thanapong

2009-01-01T23:59:59.000Z

19

A New Method to Evaluate Hydrogen Sulfide Removal from Biogas.  

E-Print Network (OSTI)

??Hydrogen sulfide in biogas fuel increases the speed at which the system utilizing the biogas corrodes. This corrosion may be prevented by separating and removing… (more)

Martin, Jerry H II

2008-01-01T23:59:59.000Z

20

Geothermal: Sponsored by OSTI -- Control of hydrogen sulfide...  

NLE Websites -- All DOE Office Websites (Extended Search)

GEOTHERMAL TECHNOLOGIES LEGACY COLLECTION - Sponsored by OSTI -- Control of hydrogen sulfide emission from geothermal power plants. Volume I. Summary of results. Final report...

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

Geothermal: Sponsored by OSTI -- Control of hydrogen sulfide...  

Office of Scientific and Technical Information (OSTI)

GEOTHERMAL TECHNOLOGIES LEGACY COLLECTION - Sponsored by OSTI -- Control of hydrogen sulfide emission from geothermal power plants. Volume II. Laboratory results and process...

22

Hydrogen Production from Hydrogen Sulfide in IGCC Power Plants  

SciTech Connect

IGCC power plants are the cleanest coal-based power generation facilities in the world. Technical improvements are needed to help make them cost competitive. Sulfur recovery is one procedure in which improvement is possible. This project has developed and demonstrated an electrochemical process that could provide such an improvement. IGCC power plants now in operation extract the sulfur from the synthesis gas as hydrogen sulfide. In this project H{sub 2}S has been electrolyzed to yield sulfur and hydrogen (instead of sulfur and water as is the present practice). The value of the byproduct hydrogen makes this process more cost effective. The electrolysis has exploited some recent developments in solid state electrolytes. The proof of principal for the project concept has been accomplished.

Elias Stefanakos; Burton Krakow; Jonathan Mbah

2007-07-31T23:59:59.000Z

23

Method of washing hydrogen sulfide from coke oven gas by the ammonium sulfide method  

Science Conference Proceedings (OSTI)

An improved coke oven gas washing process for removing hydrogen sulfide is proposed wherein the coke oven gas is treated in a hydrogen sulfide scrubber by counterflow with an aqueous ammonia wash water. A stream of aqueous weak ammonia liquor is cooled and sprayed through nozzles in the mid-region of the hydrogen sulfide scrubber. A quantity of aqueous ammonia liquor, corresponding to the quantity which is sprayed through the said nozzles, is withdrawn from the hydrogen sulfide scrubber at a level below the nozzles and is introduced into the top of the said hydrogen sulfide scrubber. Ammonia vapor released at the nozzles has a higher partial pressure than the ammonia partial pressure of the coke oven gas in the region of the nozzle. The aqueous ammonia liquor from the deacidifier is the source of the cooled aqueous ammonia liquor which is introduced through the nozzles. A portion of the aqueous ammonia liquor from the deacidifier is introduced directly into the top of the hydrogen sulfide scrubber as a portion of the required aqueous ammonia wash water.

Ritter, H.

1985-05-21T23:59:59.000Z

24

Regenerable Hydrogen Chloride Removal Sorbent and Regenerable Multifunctional Hydrogen Sulfide and Hydrogen Chloride Removal Sorbent for High Temperature Gas Streams  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Chloride and Hydrogen Sulfide Hydrogen Chloride and Hydrogen Sulfide Removal Sorbents for High Temperature Gas Streams Opportunity The Department of Energy's National Energy Technology Laboratory (NETL) is seeking licensing partners interested in implementing United States Patent Number 7,767,000 entitled "Regenerable Hydrogen Chloride Removal Sorbent and Regenerable Multifunctional Hydrogen Sulfide and Hydrogen Chloride Removal Sorbent for High Temperature Gas Streams." Disclosed in this patent is the invention of a unique regenerable sorbent process that can remove contaminants from gas produced by the gasification of fossil fuels. Specifically, the process removes hydrogen chloride by using the regenerable sorbent and simultaneously extracts hydrogen chloride compounds and hydrogen

25

Distribution Category UC-66e CONTROL OF HYDROGEN SULFIDE EMISSION  

NLE Websites -- All DOE Office Websites (Extended Search)

1 ) Distribution Category UC-66e CONTROL OF HYDROGEN SULFIDE EMISSION FROM GEOTHERMAL POWER PLANTS Final Report Volume I Summary of Results F.C. Brown W.W. Harvey - . - ...

26

REVISED HYDROGEN SULFIDE DRILLING CONTINGENCY PLAN  

E-Print Network (OSTI)

as appropriate acknowledgement of this source. Technical Note No. 19 First Printing 1993 Distribution Copies, this plan defines safety equipment and procedures that must be in place in the event H2S and/or steam on steam-flash cond

27

Method for removing hydrogen sulfide from coke oven gas  

Science Conference Proceedings (OSTI)

An improved sulfur-ammonia process is disclosed for removing hydrogen sulfide from coke oven gases. In the improved process, a concentrator formerly used for standby operation is used at all normal times as an ammonia scrubber to improve the efficiency of gas separation during normal operation and is used as a concentrator for its intended standby functions during the alternative operations. In its normal function, the concentrator/scrubber functions as a scrubber to strip ammonia gas from recirculating liquid streams and to permit introduction of an ammonia-rich gas into a hydrogen sulfide scrubber to increase the separation efficiency of that unit. In the standby operation, the same concentrator/scrubber serves as a concentrator to concentrate hydrogen sulfide in a ''strong liquor'' stream for separate recovery as a strong liquor.

Ritter, H.

1982-08-03T23:59:59.000Z

28

Distribution Category UC-66e CONTROL OF HYDROGEN SULFIDE EMISSION  

NLE Websites -- All DOE Office Websites (Extended Search)

2) Distribution Category UC-66e CONTROL OF HYDROGEN SULFIDE EMISSION FROM GEOTHERMAL POWER PLANTS F i n a l Report - Volume I I L a b o r a t o r y R e s u l t s and P...

29

Hydrogen sulfide stress corrosion cracking in materials for geothermal power  

DOE Green Energy (OSTI)

Studies to evaluate the performance of alloys used in geothermal power systems are reported. Alloys which are commercially available and those which have modified metallurgical structures and/or composition modifications were tested to determine the corrosive effects of the H/sub 2/S and thermal environments in geothermal fluids. Hydrogen embrittlement and sulfide stress corrosion cracking were tested. Test results showing the effects of alloy composition, tempering temperatures, fluid temperature and salt content, and ageing on sulfide stress cracking are tabulated. (LCL)

Hehemann, R.F.; Troiano, A.R.; Abu-Khater, B.; Ferrigno, S.

1976-01-01T23:59:59.000Z

30

MODELING OF SYNGAS REACTIONS AND HYDROGEN GENERATION OVER SULFIDES  

DOE Green Energy (OSTI)

The objective of the research is to analyze pathways of reactions of hydrogen with oxides of carbon over sulfides, and to predict which characteristics of the sulfide catalyst (nature of metal, defect structure) give rise to the lowest barriers toward oxygenated hydrocarbon product. Reversal of these pathways entails the generation of hydrogen, which is also proposed for study. During this study, adsorption reactions of H atoms and H{sub 2} molecules with MoS{sub 2}, both in molecular and solid form, have been modeled using high-level density functional theory. The relative stabilities of pure MoS{sub 2} edges were calculated and small clusters exhibiting properties of the edges were modeled. The results were finalized and published in the journal ''Surface Science''. Hydrogen adsorption energies on both the edges and the clusters were calculated, and the thermodynamics of hydrogen adsorption on both systems were evaluated. The adsorption locations and vibrational frequencies were also determined. These additional results were published in a second paper in ''Surface Science''. Most recently, the bonding and effect of alkali and transition metal ions was investigated on the MoS{sub 2} clusters. Potassium atoms bind to the clusters and increase the binding of hydrogen to the clusters while reducing the activation barriers for hydrogen adsorption. Silver attaches to the Mo7S14 cluster and donates its odd electron to the nearby Mo atoms and should have a similar effect to hydrogen as potassium does.

Kamil Klier; Jeffery A. Spirko; Michael L. Neiman

2004-10-01T23:59:59.000Z

31

Plasma-chemical conversion of hydrogen sulfide into hydrogen and sulfur  

DOE Green Energy (OSTI)

A waste-treatment process that recovers both hydrogen and sulfur from hydrogen-sulfide-contaminated industrial wastes is being developed to replace the Claus technology, which recovers only sulfur. The proposed process is based on research reported in the Soviet technical literature and uses microwave (or radio-frequency) energy to initiate plasma-chemical reactions that dissociate hydrogen sulfide into elemental hydrogen and sulfur. In the plasma-chemical process, the gaseous stream would be purified and separated into streams containing the product hydrogen, hydrogen sulfide for recycle to the plasma reactor, and the process purge containing carbon dioxide and water. Since unconverted hydrogen sulfide is recycled to the plasma reactor, the plasma-chemical process has the potential for sulfur recoveries in excess of 99% without the additional tail-gas clean-up processes associated with the Claus technology. Laboratory experiments with pure hydrogen sulfide have confirmed that conversions of over 90% per pass are possible. Experiments with impurities typical of petroleum refinery and natural gas production acid gases have demonstrated that these impurities are compatible with the plasma dissociation process and do not appear to create new waste-treatment problems. Other experiments show that the cyclonic-flow pattern hypothesized by the Russian theoretical analysis of the plasma-chemical process can substantially decrease energy requirements for hydrogen sulfide dissociation while increasing conversion. This process has several advantages over the current Claus-plus-tail-gas-cleanup technology. The primary advantage is the potential for recovering hydrogen more cheaply than the direct production of hydrogen. The difference could amount to an energy savings of 40 {times} 10{sup 15} to 70 {times} 10{sup 15} J/yr in the refining industry, for an annual savings of $500 million to $1,000 million.

Harkness, J.B.L.; Doctor, R.D.; Daniels, E.J.

1993-09-01T23:59:59.000Z

32

Removal of mercury from gas streams using hydrogen sulfide and amines  

SciTech Connect

Phillips Petroleum Co. has developed an integrated process for treating a natural-gas stream with a precipitating agent to remove mercury and introducing an absorption agent to control the amount of precipitating agent left in the gas stream. In the process, a gas (particularly a sulfur-free natural gas) that contains mercury is contacted with an amount of hydrogen sulfide in excess of the stoichiometric amount of hydrogen sulfide necessary to precipitate sulfides of mercury, with further contact with an amine that is an absorption agent for hydrogen sulfide. The hydrogen sulfide precipitates sulfides of mercury from the gas stream while the amine absorbs the excess hydrogen sulfide to produce a gas stream of minimal sulfur content with a reduced mercury content that can be below the range of detection.

Miller, A.J.; Tuckett, W.F.

1977-08-23T23:59:59.000Z

33

Carbon Dioxide and Hydrogen Sulfide Emission Factors Applicable to Wastewater Wet Wells.  

E-Print Network (OSTI)

??Transport of wastewater in sewer networks causes potential problems associated with gases which include ammonia, carbon dioxide, carbon monoxide, hydrogen sulfide and methane, in regard… (more)

Mudragaddam, Madhuri

2010-01-01T23:59:59.000Z

34

H2S molecular beam passivation of Ge(001)  

Science Conference Proceedings (OSTI)

A fundamental issue regarding the introduction of high-mobility Ge channels in CMOS circuits is the electrical passivation of the interface with the high-k gate dielectric. In this paper, we investigate the passivation of p-Ge(001) using molecular H"2S. ... Keywords: H2S, High-µ semiconductors, Molecular beam epitaxy, Passivation

C. Merckling; Y. C. Chang; C. Y. Lu; J. Penaud; M. El-Kazzi; F. Bellenger; G. Brammertz; M. Hong; J. Kwo; M. Meuris; J. Dekoster; M. M. Heyns; M. Caymax

2011-04-01T23:59:59.000Z

35

Methods for producing hydrogen (BI) sulfide and/or removing metals  

DOE Patents (OSTI)

The present invention is a process wherein sulfide production by bacteria is efficiently turned on and off, using pH adjustment. The adjustment of pH impacts sulfide production by bacteria by altering the relative amounts of H.sub.2 S and HS-- in solution and thereby control the inhibition of the bacterial metabolism that produces sulfide. This process can be used to make a bioreactor produce sulfide "on-demand" so that the production of sulfide can be matched to its use as a metal precipitation reagent. The present invention is of significance because it enables the use of a biological reactor, a cost effective sulfide production system, by making the biological reactor produce hydrogen sulfide "on demand", and therefore responsive to production schedules, waste stream generation rate, and health and safety requirements/goals.

Truex, Michael J [Richland, WA; Peyton, Brent M [Pullman, WA; Toth, James J [Kennewick, WA

2002-05-14T23:59:59.000Z

36

Metal?organic frameworks for the storage and delivery of biologically active hydrogen sulfide  

SciTech Connect

Hydrogen sulfide is an extremely toxic gas that is also of great interest for biological applications when delivered in the correct amount and at the desired rate. Here we show that the highly porous metal-organic frameworks with the CPO-27 structure can bind the hydrogen sulfide relatively strongly, allowing the storage of the gas for at least several months. Delivered gas is biologically active in preliminary vasodilation studies of porcine arteries, and the structure of the hydrogen sulfide molecules inside the framework has been elucidated using a combination of powder X-ray diffraction and pair distribution function analysis.

Allan, Phoebe K.; Wheatley, Paul S.; Aldous, David; Mohideen, M. Infas; Tang, Chiu; Hriljac, Joseph A.; Megson, Ian L.; Chapman, Karena W.; De Weireld, Guy; Vaesen, Sebastian; Morris, Russell E. (St Andrews)

2012-04-02T23:59:59.000Z

37

Mitigation of hydrogen sulfide emissions in The Geysers KGRA  

DOE Green Energy (OSTI)

Violations of the ambient air quality standard (AAQS) for hydrogen sulfide (H/sub 2/S) are currently being experienced in The Geysers KGRA and could significantly increase in the future. Attainment and maintenance of the H/sub 2/S AAQS is a potential constraint to optimum development of this resource. The availability of reliable H/sub 2/S controls and the development of a validated air dispersion model are critical to alleviating this constraint. The purpose of this report is to assess the performance capabilities for state-of-the-art controls, to identify potential cost-effective alternative controls, and to identify the California Energy Commission (CEC) staff's efforts to develop a validated air dispersion model. Currently available controls (Stretford, Hydrogen Peroxide, and EIC) are capable of abating H/sub 2/S emissions from a proposed facility to five lbs/hr. Alternative controls, such as condensate stripping and condensate pH control, appear to be promising, cost-effective control options.

Buell, R.

1981-07-01T23:59:59.000Z

38

Interaction of H2S with alpha-Fe2O3(0001) Surface  

SciTech Connect

The atomic-scale structural changes in an {alpha}-Fe2O3 (hematite) (0 0 0 1) surface induced by sulfidation and subsequent oxidation processes were studied by X-ray photoemission spectroscopy, LEED, and X-ray standing wave (XSW) measurements. Annealing the {alpha}-Fe2O3(0 0 0 1) with a H2S partial pressure of 1 x 10-7 Torr produced iron sulfides on the surface as the sulfur atoms reacted with the substrate Fe ions. The oxidation state of the substrate Fe changed from 3+ to 2+ as a result of the sulfidation. The XSW measured distance of the sulfur atomic-layer from the unrelaxed substrate oxygen layer was 3.16 Angstroms. The sulfide phase consisted of three surface domains identified by LEED. Formation of the two-dimensional FeS2 phase with structural parameters consistent with an outermost layer of (1 1 1) pyrite has been proposed. Atomic oxygen exposure oxidized the surface sulfide to a sulfate (SO{sup 2-}{sub 4}) and regenerated the {alpha}-Fe2O3(0 0 0 1) substrate, which was indicated by a (1 x 1) LEED pattern and the re-oxidization of Fe to 3+.

Kim,C.; Escuadro, A.; Bedzyk, M.

2007-01-01T23:59:59.000Z

39

Updated cost estimates of meeting geothermal hydrogen sulfide emission regulations  

DOE Green Energy (OSTI)

A means of estimating the cost of hydrogen sulfide (H/sub 2/S) emission control was investigated. This study was designed to derive H/sub 2/S emission abatement cost functions and illustrate the cost of H/sub 2/S emission abatement at a hydrothermal site. Four tasks were undertaken: document the release of H/sub 2/S associated with geothermal development; review H/sub 2/S environmental standards; develop functional relationships that may be used to estimate the most cose-effective available H/sub 2/S abatement process; and use the cost functions to generate abatement cost estimates for a specific site. The conclusions and recommendations derived from the research are presented. The definition of the term impacts as used in this research is discussed and current estimates of the highest expected H/sub 2/S concentrations of in geothermal reservoirs are provided. Regulations governing H/sub 2/S emissions are reviewed and a review of H/sub 2/S control technology and a summary of the control cost functions are included. A case study is presented to illustrate H/sub 2/S abatement costs at the Baca KGRA in New Mexico.

Wells, K.D.; Currie, J.W.; Weakley, S.A.; Ballinger, M.Y.

1981-08-01T23:59:59.000Z

40

Novel Composite Hydrogen-Permeable Membranes for Nonthermal Plasma Reactors for the Decomposition of Hydrogen Sulfide  

DOE Green Energy (OSTI)

The goal of this experimental project was to design and fabricate a reactor and membrane test cell to dissociate hydrogen sulfide (H{sub 2}S) in a nonthermal plasma and to recover hydrogen (H{sub 2}) through a superpermeable multi-layer membrane. Superpermeability of hydrogen atoms (H) has been reported by some researchers using membranes made of Group V transition metals (niobium, tantalum, vanadium, and their alloys), but it was not achieved at the moderate pressure conditions used in this study. However, H{sub 2}S was successfully decomposed at energy efficiencies higher than any other reports for the high H{sub 2}S concentration and moderate pressures (corresponding to high reactor throughputs) used in this study.

Morris Argyle; John Ackerman; Suresh Muknahallipatna; Jerry Hamann; Stanislaw Legowski; Gui-Bing Zhao; Sanil John; Ji-Jun Zhang; Linna Wang

2007-09-30T23:59:59.000Z

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

Effect of hydrogen-sulfide on the hydrogen permeance of palladium–copper alloys at elevated temperatures  

E-Print Network (OSTI)

The hydrogen permeance of several 0.1 mm thick Pd–Cu alloy foils (80 wt. % Pd–20 wt. % Cu, 60 wt. % Pd–40 wt. % Cu and 53 wt.% Pd–47 wt. % Cu) was evaluated using transient flux measurements at temperatures ranging from 603 to 1123 K and pressures up to 620 kPa both in the presence and absence of 1000 ppm H2S. Sulfur resistance, as evidenced by no significant change in permeance, was correlated with the temperatures associated with the face-centered-cubic crystalline structure for the alloys in this study. The permeance of the body-centered cubic phase, however, was up to two orders of magnitude lower when exposed to H2S. A smooth transition from sulfur poisoning to sulfur resistance with increasing temperature was correlated with the alloy transition from a body-centered-cubic structure to a face-centered-cubic structure. © 2004 Elsevier B.V. All rights reserved.

B. D. Morreale B; M. V. Ciocco B; B. H. Howard A

2004-01-01T23:59:59.000Z

42

Direct chlorination process for geothermal power plant off-gas - hydrogen sulfide abatement  

DOE Green Energy (OSTI)

The Direct Chlorination Process removes hydrogen sulfide from geothermal off-gases by reacting hydrogen sulfide with chlorine in the gas phase. Hydrogen chloride and elemental sulfur are formed by this reaction. The Direct Chlorination Process has been successfully demonstrated by an on-site operation of a pilot plant at the 3 M We HPG-A geothermal power plant in the Puna District on the island of Hawaii. Over 99.5 percent hydrogen sulfide removal was achieved in a single reaction stage. Chlorine gas did not escape the pilot plant, even when 90 percent excess chlorine gas was used. Because of the higher cost of chemicals and the restricted markets in Hawaii, the economic viability of this process in Hawaii is questionable.

Sims, A.V.

1983-06-01T23:59:59.000Z

43

Direct chlorination process for geothermal power plant off-gas - hydrogen sulfide abatement  

DOE Green Energy (OSTI)

The Direct Chlorination Process removes hydrogen sulfide from geothermal off-gases by reacting hydrogen sulfide with chlorine in the gas phase. Hydrogen chloride and elemental sulfur are formed by this reaction. The Direct Chlorination Process has been successfully demonstrated by an on-site operation of a pilot plant at the 3 M We HPG-A geothermal power plant in the Puna District on the island of Hawaii. Over 99.5 percent hydrogen sulfide removal was achieved in a single reaction state. Chlorine gas did not escape the pilot plant, even when 90 percent excess chlorine gas was used. A preliminary economic evaluation of the Direct Chlorination Process indicates that it is very competitive with the Stretford Process. Compared to the Stretford Process, the Direct Chlorination Process requires about one-third the initial capital investment and about one-fourth the net daily expenditure.

Sims, A.V.

1983-06-01T23:59:59.000Z

44

Conversion of ammonia into hydrogen and nitrogen by reaction with a sulfided catalyst  

DOE Patents (OSTI)

A method is provided for removing ammonia from the sour water stream of a coal gasification process. The basic steps comprise stripping the ammonia from the sour water; heating the stripped ammonia to a temperature from between 400.degree. to 1,000.degree. F; passing the gaseous ammonia through a reactor containing a sulfided catalyst to produce elemental hydrogen and nitrogen; and scrubbing the reaction product to obtain an ammonia-free gas. The residual equilibrium ammonia produced by the reactor is recycled into the stripper. The ammonia-free gas may be advantageously treated in a Claus process to recover elemental sulfur. Iron sulfide or cobalt molybdenum sulfide catalysts are used.

Matthews, Charles W. (Denver, CO)

1977-01-01T23:59:59.000Z

45

Analysis of hypochlorite process for removal of hydrogen sulfide from geothermal gases  

SciTech Connect

Sodium hypochlorite reacts readily with hydrogen sulfide to convert the sulfide ion into free sulfur in a neutral or acid solution and to the sulfate ion in an alkaline solution. Sodium hypochlorite can be generated on site by processing geothermal brine in electrolytic cells. An investigation to determine if this reaction could be economically used to remove hydrogen sulfide from geothermal noncondensible gases is reported. Two processes, the LO-CAT Process and the Stretford Process, were selected for comparison with the hypochlorite process. Three geothermal reservoirs were considered for evaluation: Niland KGRA, Baca KGRA, and The Geysers KGRA. Because of the wide variation in the amount of hydrogen sulfide present at The Geysers, two different gas analyses were considered for treatment. Plants were designed to process the effluent noncondensible gases from a 10 MW/sub e/ geothermal power plant. The effluent gas from each plant was to contain a maximum hydrogen sulfide concentration of 35 ppb. Capital costs were estimated for each of the processes at each of the four sites selected. Operating costs were also calculated for each of the processes at each of the sites. The results of these studies are shown.

1980-04-01T23:59:59.000Z

46

Control of hydrogen sulfide emission from geothermal power plants  

DOE Green Energy (OSTI)

A process for controlling H/sub 2/S emissions at geothermal power plants was evaluated in laboratory scale equipment and by process engineering analysis. The process is based on scrubbing geothermal steam with a metal salt solution to selectively remove and precipitate the contained H/sub 2/S. The metal sulfide is roasted or oxygen/acid leached to regenerate the metal salt, and sulfur is rejected from the system as elemental sulfur or as sulfate. Up to 95 percent removal of H/sub 2/S from simulated geothermal steams was obtained in a 2'' diameter scrubbing column packed with 3 feet of 5/8'' Flexirings by use of a recirculating slurry of copper sulfate/copper sulfide. Information is included on the chemistry, thermodynamics, kinetics and process control aspects of the process, scrubber system design, operation, and corrosion, and design proposals and cost estimates for a H/sub 2/S removal system. (LCL)

Harvey, W.W.; Brown, F.C.; Turchan, M.J.

1976-07-01T23:59:59.000Z

47

Reaction of hydrogen sulfide with oxygen in the presence of sulfite  

DOE Green Energy (OSTI)

Commonly, abatement of hydrogen sulfide emission from a geothermal powerplant requires that hydrogen sulfide dissolved in the cooling water be eliminated by chemical reaction. Oxidation by atmospheric oxygen is the preferred reaction, but requires a suitable catalyst. Nickel is the most potent and thereby cheapest catalyst for this purpose. One mg/L nickel in the cooling water would allow 99% removal of hydrogen sulfide to be attained. A major drawback of catalytic air oxidation is that colloidal sulfur is a major reaction product; this causes rapid sludge accumulation and deposition of sulfur scale. We studied the kinetics and product distribution of the reaction of hydrogen sulfide with oxygen, catalyzed by nickel. Adding sodium sulfite to the solution completely suppresses formation of colloidal sulfur by converting it to thiosulfate. The oxidation reaction is an autocatalytic, free radical chain reaction. A rate expression for this reaction and a detailed reaction mechanism were developed. Nickel catalyzes the chain initiation step, and polysulfidoradical ions propagate the chains. Several complexes of iron and cobalt were also studied. Iron citrate and iron N-hydroxyEDTA are the most effective iron based catalysts. Uncomplexed cobalt is as effective as nickel, but forms a precipitate of cobalt oxysulfide and is too expensive for practical use. 33 figures, 9 tables.

Weres, O.; Tsao, L.

1983-01-14T23:59:59.000Z

48

Reaction of Hydrogen Sulfide with Oxygen in the Presence ofSulfite  

DOE Green Energy (OSTI)

Commonly, abatement of hydrogen sulfide emissions from a geothermal powerplant requires that hydrogen sulfide dissolved in the cooling water be eliminated by chemical reaction. Oxidation by atmospheric oxygen is the preferred reaction, but requires a suitable catalyst. Nickel is the most potent and thereby cheapest catalyst for this purpose. One Mg/L nickel in the cooling water would allow 99% removal of hydrogen sulfide to be attained. A major drawback of catalytic air oxidation is that colloidal sulfur is a major reaction product; this causes rapid sludge accumulation and deposition of sulfur scale. The authors studied the kinetics and product distribution of the reaction of hydrogen sulfide with oxygen, catalyzed by nickel. Adding sodium sulfite to the solution completely suppresses formation of colloidal sulfur by converting it to thiosulfate. The oxidation reaction is an autocatalytic, free radical chain reaction. A rate expression for this reaction and a detailed reaction mechanism were developed. Nickel catalyzes the chain initiation step, and polysulfidoradical ions propagate the chains. Several complexes of iron and cobalt were also studied. Iron citrate and iron N-hydroxyEDT are the most effective iron based catalysts. Uncomplexed cobalt is as effective as nickel, but forms a precipitate of cobalt oxysulfide and is too expensive for practical use.

Weres, Oleh; Tsao, Leon

1983-01-01T23:59:59.000Z

49

High-Temperature Nano-Derived Micro-Hydrogen Sulfide Sensors  

NLE Websites -- All DOE Office Websites (Extended Search)

Temperature Nano-Derived Micro- Temperature Nano-Derived Micro- Hydrogen and -Hydrogen Sulfide Sensors Background The Department of Energy (DOE) National Energy Technology Laboratory (NETL) seeks applications for the University Coal Research (UCR) Program to further develop the understanding of coal utilization. Since the program's inception in 1979, its primary objectives have been to (1) improve our understanding of the chemical and physical processes involved in the conversion and utilization of coal in an environmentally

50

Removal of hydrogen sulfide from simulated geothermal brines by reaction with oxygen. Final report, October 6, 1975-February 4, 1977  

DOE Green Energy (OSTI)

A process for controlling hydrogen sulfide emissions and corrosivity in geothermal systems has been evaluated on a small laboratory pilot plant scale and shown to be technically feasible. The hydrogen sulfide was oxidized by oxygen injected directly into a 11.4-liter-(3-gallon)-per-minute flowing stream of simulated geothermal brine. The oxidation of the sulfide was complete at oxygen:sulfide mole ratios of 1.25:1 to 1.5:1, depending on temperature and total dissolved solids in the brine. The reaction products were free sulfur, sulfite and sulfate. The ratio of these was dependent upon the oxygen:sulfide mole ratios; but, generally, more than 80% of the sulfide was converted to sulfate, approximately 10% to free sulfur and less than 10% to sulfite.

Wilson, J.S.; King, J.E.; Bullard, G.R.

1977-04-01T23:59:59.000Z

51

Electrochemical polishing of hydrogen sulfide from coal synthesis gas  

DOE Green Energy (OSTI)

An advanced process has been developed for the separation of H{sub 2}S from coal gasification product streams through an electrochemical membrane. This technology is developed for use in coal gasification facilities providing fuel for cogeneration coal fired electrical power facilities and Molten Carbonate Fuel Cell electrical power facilities. H{sub 2}S is removed from the syn-gas by reduction to the sulfide ion and H at the cathode. The sulfide ion migrates to the anode through a molten salt electrolyte suspended in an inert ceramic matrix. Once at the anode it is oxidized to elemental sulfur and swept away for condensation in an inert gas stream. The syn-gas is enriched with the H{sub 2}. Order-of-magnitude reductions in H{sub 2}S have been repeatably recorded (100 ppm to 10 ppm H{sub 2}S) on a single pass through the cell. This process allows removal of H{sub 2}S without cooling the gas stream and with negligible pressure loss through the separator. Since there are no absorbents used, there is no absorption/regeneration step as with conventional technology. Elemental sulfur is produced as a by-product directly, so there is no need for a Claus process for sulfur recovery. This makes the process economically attractive since it is much less equipment intensive than conventional technology.

Gleason, E.F.; Winnick, J.

1995-11-01T23:59:59.000Z

52

Direct Chlorination Process for geothermal power plant off-gas - hydrogen sulfide abatement  

DOE Green Energy (OSTI)

The Direct Chlorination Process removes hydrogen sulfide from geothermal off-gases by reacting hydrogen sulfide with chlorine in the gas phase. Hydrogen chloride and elemental sulfur are formed by this reaction. The Direct Chlorination Process has been successfully demonstrated by an on-site operation of a pilot plant at the 3 M We HPG-A geothermal power plant in the Puna District on the island of Hawaii. Over 99.5% hydrogen sulfide removal was achieved in a single reaction stage. Chlorine gas did not escape the pilot plant, even when 90% excess chlorine gas was used. A preliminary economic evaluation of the Direct Chlorination Process indicates that it is very competitive with the Stretford Process Compared to the Stretford Process, the Direct Chlorination process requires about one-third the initial capital investment and about one-fourth the net daily expenditure. Because of the higher cost of chemicals and the restricted markets in Hawaii, the economic viability of this process in Hawaii is questionable.

Sims, A.V.

1983-06-01T23:59:59.000Z

53

Durable regenerable sorbent pellets for removal of hydrogen sulfide from coal gas  

DOE Patents (OSTI)

Pellets for removing hydrogen sulfide from a coal gasification stream at an elevated temperature are presented in durable form, usable over repeated cycles of absorption and regeneration. The pellets include a material reactive with hydrogen sulfide, in particular zinc oxide, a binder, and an inert material, in particular calcium sulfate (Drierite), having a particle size substantially larger than other components of the pellets. A second inert material and a promoter may also be included. Preparation of the pellets may be carried out by dry, solid-state mixing of components, moistening the mixture, and agglomerating it into pellets, followed by drying and calcining. Pellet size is selected, depending on the type of reaction bed for which the pellets are intended. The use of inert material with a large particle size provides a stable pellet structure with increased porosity, enabling effective gas contact and prolonged mechanical durability.

Siriwardane, R.V.

1995-12-31T23:59:59.000Z

54

Durable regenerable sorbent pellets for removal of hydrogen sulfide from coal gas  

DOE Patents (OSTI)

Pellets for removing hydrogen sulfide from a coal gasification stream at an elevated temperature are prepared in durable form usable over repeated cycles of absorption and regeneration. The pellets include a material reactive with hydrogen sulfide, in particular zinc oxide, a binder, and an inert material, in particular calcium sulfate (drierite), having a particle size substantially larger than other components of the pellets. A second inert material and a promoter may also be included. Preparation of the pellets may be carried out by dry, solid-state mixing of components, moistening the mixture, and agglomerating it into pellets, followed by drying and calcining. Pellet size is selected, depending on the type of reaction bed for which the pellets are intended. The use of inert material with a large particle size provides a stable pellet structure with increased porosity, enabling effective gas contact and prolonged mechanical durability.

Siriwardane, Ranjani V. (Morgantown, WV)

1997-01-01T23:59:59.000Z

55

Durable regenerable sorbent pellets for removal of hydrogen sulfide coal gas  

DOE Patents (OSTI)

Pellets for removing hydrogen sulfide from a coal gasification stream at an elevated temperature are prepared in durable form, usable over repeated cycles of absorption and regeneration. The pellets include a material reactive with hydrogen sulfide, in particular zinc oxide, a binder, and an inert material, in particular calcium sulfate (drierite), having a particle size substantially larger than other components of the pellets. A second inert material and a promoter may also be included. Preparation of the pellets may be carried out by dry, solid-state mixing of components, moistening the mixture, and agglomerating it into pellets, followed by drying and calcining. Pellet size is selected, depending on the type of reaction bed for which the pellets are intended. The use of inert material with a large particle size provides a stable pellet structure with increased porosity, enabling effective gas contact and prolonged mechanical durability.

Siriwardane, Ranjani V. (Morgantown, WV)

1999-01-01T23:59:59.000Z

56

State-of-the-art hydrogen sulfide control for geothermal energy systems: 1979  

DOE Green Energy (OSTI)

Existing state-of-the-art technologies for removal of hydrogen sulfide are discussed along with a comparative assessment of their efficiencies, reliabilities and costs. Other related topics include the characteristics of vapor-dominated and liquid-dominated resources, energy conversion systems, and the sources of hydrogen sulfide emissions. It is indicated that upstream control technologies are preferred over downsteam technologies primarily because upstream removal of hydrogen sulfide inherently controls all downstream emissions including steam-stacking. Two upstream processes for vapor-dominated resources appear promising; the copper sulfate (EIC) process, and the steam converter (Coury) process combined with an off-gas abatement system such as a Stretford unit. For liquid-dominated systems that produce steam, the process where the non-condensible gases are scrubbed with spent geothermal fluid appears to be promising. An efficient downstream technology is the Stretford process for non-condensible gas removal. In this case, partitioning in the surface condenser will determine the overall abatement efficiency. Recommendations for future environmental control technology programs are included.

Stephens, F.B.; Hill, J.H.; Phelps, P.L. Jr.

1980-03-01T23:59:59.000Z

57

The use of ethylenediamine to remove hydrogen sulfide from coke oven gas  

Science Conference Proceedings (OSTI)

The investigations of the equilibrium absorption of H/sub 2/S by an EDA solution showed the solubility of hydrogen sulfide in ethylenediamine solutions is almost twice that in monoethanolamine solutions. Ethylenediamine may be used as an absorber for thorough removal of H/sub 2/S from coke oven gas in the presence of CO/sub 2/ and HCN. The hydrogen cyanide of coke oven gas, having practically no effect on the equilibrium absorption of H/sub 2/S and CO/sub 2/, may in this case be used in the form of ethylenethiourea - a marketable byproduct.

Marakhovskii, L.F.; Rezunenko, Y.I.; Popov, A.A.

1983-01-01T23:59:59.000Z

58

Use of ethylenediamine to remove hydrogen sulfide from coke oven gas  

SciTech Connect

The investigations of the equilibrium absorption of H/sub 2/S by an EDA solution which show that the solubility of hydrogen sulfide in ethylenediamine solutions is almost twice that in monoethanolamine solutions. Ethylenediamine may be used as an absorber for thorough removal of H/sub 2/S from coke oven gas in the presence of CO/sub 2/ and HCN. The hydrogen cyanide of coke oven gas, having practically no effect on the equilibrium absorption of H/sub 2/S and CO/sub 2/, may in this case be recovered in the form of ethylenethiourea - a marketable byproduct.

Marakhovskii, L.F.; Popov, A.A.; Rezunenko, Yu.I.

1983-01-01T23:59:59.000Z

59

Single Membrane Reactor Configuration for Separation of Hydrogen, Carbon Dioxide and Hydrogen Sulfide  

DOE Green Energy (OSTI)

The objective of the project was to develop a novel complementary membrane reactor process that can consolidate two or more downstream unit operations of a coal gasification system into a single module for production of a pure stream of hydrogen and a pure stream of carbon dioxide. The overall goals were to achieve higher hydrogen production efficiencies, lower capital costs and a smaller overall footprint than what could be achieved by utilizing separate components for each required unit process/operation in conventional coal-to-hydrogen systems. Specifically, this project was to develop a novel membrane reactor process that combines hydrogen sulfide removal, hydrogen separation, carbon dioxide separation and water-gas shift reaction into a single membrane configuration. The carbon monoxide conversion of the water-gas-shift reaction from the coal-derived syngas stream is enhanced by the complementary use of two membranes within a single reactor to separate hydrogen and carbon dioxide. Consequently, hydrogen production efficiency is increased. The single membrane reactor configuration produces a pure H{sub 2} product and a pure CO{sub 2} permeate stream that is ready for sequestration. This project focused on developing a new class of CO{sub 2}-selective membranes for this new process concept. Several approaches to make CO{sub 2}-selective membranes for high-temperature applications have been tested. Membrane disks using the technique of powder pressing and high temperature sintering were successfully fabricated. The powders were either metal oxide or metal carbonate materials. Experiments on CO{sub 2} permeation testing were also performed in the temperature range of 790 to 940 C for the metal carbonate membrane disks. However, no CO{sub 2} permeation rate could be measured, probably due to very slow CO{sub 2} diffusion in the solid state carbonates. To improve the permeation of CO{sub 2}, one approach is to make membranes containing liquid or molten carbonates. Several different types of dual-phase membranes were fabricated and tested for their CO{sub 2} permeation in reducing conditions without the presence of oxygen. Although the flux was quite low, on the order of 0.01-0.001 cc STP/cm{sup 2}/min, the selectivity of CO{sub 2}/He was almost infinite at temperatures of about 800 C. A different type of dual-phase membrane prepared by Arizona State University (ASU) was also tested at GTI for CO{sub 2} permeation. The measured CO{sub 2} fluxes were 0.015 and 0.02 cc STP/cm{sup 2}/min at 750 and 830 C, respectively. These fluxes were higher than the previous flux obtained ({approx}0.01 cc STP/cm{sup 2}/min) using the dual-phase membranes prepared by GTI. Further development in membrane development should be conducted to improve the CO{sub 2} flux. ASU has also focused on high temperature permeation/separation experiments to confirm the carbon dioxide separation capabilities of the dual-phase membranes with La{sup 0.6}Sr{sub 0.4}Co{sub 0.8}Fe{sub 0.2}O{sub 3-{delta}} (LSCF6482) supports infiltrated with a Li/Na/K molten carbonate mixture (42.5/32.5/25.0 mole %). The permeation experiments indicated that the addition of O{sub 2} does improve the permeance of CO{sub 2} through the membrane. A simplified membrane reactor model was developed to evaluate the performance of the process. However, the simplified model did not allow the estimation of membrane transport area, an important parameter for evaluating the feasibility of the proposed membrane reactor technology. As a result, an improved model was developed. Results of the improved membrane reactor model show that the membrane shift reaction has promise as a means to simplify the production of a clean stream of hydrogen and a clean stream of carbon dioxide. The focus of additional development work should address the large area required for the CO{sub 2} membrane as identified in the modeling calculations. Also, a more detailed process flow diagram should be developed that includes integration of cooling and preheating feed streams as well as particulate removal so that stea

Micheal Roberts; Robert Zabransky; Shain Doong; Jerry Lin

2008-05-31T23:59:59.000Z

60

Plasma-chemical treatment of hydrogen sulfide in natural gas processing. Final report, May 1991--December 1992  

DOE Green Energy (OSTI)

A new process for the treatment of hydrogen sulfide waste that uses microwave plasma-chemical technology has been under development in Russia and the United States. Whereas the present waste-treatment technology, at best, only recovers sulfur, this novel process recovers both hydrogen and sulfur by dissociating hydrogen sulfide in a plasma by means of a microwave or radio-frequency reactor. A research project has been undertaken to determine the suitability of the plasma process in natural gas processing applications. The experiments tested acid-gas compositions with 30--65% carbon dioxide, 0--7% water, and 0--0.2% of a standard mixture of pipeline gas. The balance gas in all cases was hydrogen sulfide. The reactor pressure for the experiments was 50 torr, and the microwave power was 1.0 kW. Conversions of hydrogen sulfide ranged from 80 to 100%, while 35--50% of the carbon dioxide was converted to carbon monoxide. This conversion of carbon dioxide resulted in a loss of hydrogen production and an energy loss from a hydrogen sulfide waste-treatment perspective. Tests of a direct natural gas treatment concept showed that hydrocarbon losses were unacceptably high; consequently, the concept would not be economically viable.

Harkness, J.B.L.; Doctor, R.D. [Argonne National Lab., IL (United States)

1993-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

Sensitive Detection of H2S Using Gold Nanoparticle Decorated Single-Walled Carbon  

E-Print Network (OSTI)

in large amounts in coal and natural gas processing, petroleum industries, biogas production, and sewage . The H2S and dry air gas flow rates were regulated by mass flow controllers (Alicat Scientific Incorpo sensitive conducto- metric gas nanosensors for H2S can be synthesized by electrodepositing gold

62

Numerical Simulation of Making Hydrogen from Rich Filtration Combustion of Hydrogen Sulfide  

Science Conference Proceedings (OSTI)

Filtration combustion in porous media offers good advantages such as super-adiabatic combustion temperature in making hydrogen from hydrogen sulfur which is extremely toxic and is vastly produced in industry. In order to study the mechanism of making ... Keywords: Filtration combustion, coupled chemistry-hydrodynamics, making hydrogen, computational fluid dynamics

Li Guoneng

2010-03-01T23:59:59.000Z

63

High Temperature Electrochemical Polishing of H(2)S from Coal Gasification Process Streams.  

DOE Green Energy (OSTI)

An advanced process for the separation of hydrogen sulfide from coal gasification streams through an electrochemical membrane is being perfected. H{sub 2}S is removed from a synthetic gas stream, split into hydrogen, which enriches the exiting syngas, and sulfur, which is condensed downstream from an inert sweep gas stream. The process allows for continuous removal of H{sub 2}S without cooling the gas stream while allowing negligible pressure loss through the separator. Moreover, the process is economically attractive due to the elimination of the need for a Claus process for sulfur recovery. To this extent the project presents a novel concept for improving utilization of coal for more efficient power generation.

Winnick, J.

1997-12-31T23:59:59.000Z

64

KINETICS OF DIRECT OXIDATION OF H2S IN COAL GAS TO ELEMENTAL SULFUR  

DOE Green Energy (OSTI)

The direct oxidation of H{sub 2}S to elemental sulfur in the presence of SO{sub 2} is ideally suited for coal gas from commercial gasifiers with a quench system to remove essentially all the trace contaminants except H{sub 2}S. This direct oxidation process has the potential to produce a super clean coal gas more economically than both conventional amine-based processes and the hot-gas desulfurization using regenerable metal oxide sorbents followed by Direct Sulfur Recovery Process. The objective of this research is to support the near- and long-term process development efforts to commercialize this direct oxidation technology. The objectives of this research are to measure kinetics of direct oxidation of H{sub 2}S to elemental sulfur in the presence of a simulated coal gas mixture containing SO{sub 2}, H{sub 2}, and moisture, using 160-{micro}m C-500-04 alumina catalyst particles and a micro bubble reactor, and to develop kinetic rate equations and model the direct oxidation process to assist in the design of large-scale plants. This heterogeneous catalytic reaction has gaseous reactants such as H{sub 2}S and SO{sub 2}. However, this heterogeneous catalytic reaction has heterogeneous products such as liquid elemental sulfur and steam. To achieve the above-mentioned objectives, experiments on conversion of hydrogen sulfide into liquid elemental sulfur were carried out for the space time range of 1-6 milliseconds at 125-155 C to evaluate effects of reaction temperature, moisture concentration, reaction pressure on conversion of hydrogen sulfide into liquid elemental sulfur. Simulated coal gas mixtures consist of 70 v% hydrogen, 2,500-7,500-ppmv hydrogen sulfide, 1,250-3,750 ppmv sulfur dioxide, and 0-15 vol% moisture, and nitrogen as remainder. Volumetric feed rates of a simulated coal gas mixture to a micro bubble reactor are 100 cm{sup 3}/min at room temperature and atmospheric pressure. The temperature of the reactor is controlled in an oven at 125-155 C. The pressure of the reactor is maintained at 40-170 psia.

K.C. Kwon

2004-01-01T23:59:59.000Z

65

KINETICS OF DIRECT OXIDATION OF H2S IN COAL GAS TO ELEMENTAL SULFUR  

DOE Green Energy (OSTI)

The direct oxidation of H{sub 2}S to elemental sulfur in the presence of SO{sub 2} is ideally suited for coal gas from commercial gasifiers with a quench system to remove essentially all the trace contaminants except H{sub 2}S. This direct oxidation process has the potential to produce a super clean coal gas more economically than both conventional amine-based processes and the hot-gas desulfurization using regenerable metal oxide sorbents followed by Direct Sulfur Recovery Process. The objective of this research is to support the near- and long-term process development efforts to commercialize this direct oxidation technology. The objectives of this research are to measure kinetics of direct oxidation of H{sub 2}S to elemental sulfur in the presence of a simulated coal gas mixture containing SO{sub 2}, H{sub 2}, and moisture, using 160-{micro}m C-500-04 alumina catalyst particles and a micro bubble reactor, and to develop kinetic rate equations and model the direct oxidation process to assist in the design of large-scale plants. This heterogeneous catalytic reaction has gaseous reactants such as H{sub 2}S and SO{sub 2}. However, this heterogeneous catalytic reaction has heterogeneous products such as liquid elemental sulfur and steam. To achieve the above-mentioned objectives, experiments on conversion of hydrogen sulfide into liquid elemental sulfur were carried out for the space time range of 0.059-0.87 seconds at 125-155 C to evaluate effects of reaction temperature, H{sub 2}S concentration, reaction pressure, and catalyst loading on conversion of hydrogen sulfide into liquid elemental sulfur. Simulated coal gas mixtures consist of 62-78 v% hydrogen, 3,000-7,000-ppmv hydrogen sulfide, 1,500-3,500 ppmv sulfur dioxide, and 10 vol % moisture, and nitrogen as remainder. Volumetric feed rates of a simulated coal gas mixture to a micro bubble reactor are 50 cm{sup 3}/min at room temperature and atmospheric pressure. The temperature of the reactor is controlled in an oven at 125-155 C. The pressure of the reactor is maintained at 40-170 psia. The molar ratio of H{sub 2}S to SO{sub 2} in the bubble reactor is maintained at 2 for all the reaction experiment runs.

K.C. Kwon

2005-01-01T23:59:59.000Z

66

Journal of Power Sources 135 (2004) 184191 A solid oxide fuel cell system fed with hydrogen sulfide  

E-Print Network (OSTI)

, such as food processing, coke ovens, paper mills, tanneries, and petroleum refineries. Sometimes, a desulfurizer, and two recuperators. Natural gas is internally reformed, and the product, a hydrogen-rich gas sulfide and natural gas Yixin Lu, Laura Schaefer1 Department of Mechanical Engineering, University

67

Selective Catalytic Oxidation of Hydrogen Sulfide--Systems Analysis for IGCC Applications  

SciTech Connect

Selective catalytic oxidation of hydrogen sulfide (SCOHS) has been evaluated conceptually for IGCC applications, and the theoretical limits of reaction performance, process performance, and economic potential in IGCC have been estimated. Syngas conditions that have high partial pressures of total sulfur result in substantial liquid sulfur retention within the catalyst bed, with relatively complex processing being required. Applications that have much lower total sulfur partial pressure in the process gas might permit SCOHS operation under conditions where little liquid sulfur is retained in the catalyst, reducing the processing complexity and possibly improving the desulfurization performance. The results from our recent IGCC process evaluations using the SCOHS technology and conventional syngas cleaning are presented, and alternative SCOHS process configurations and applications that provide greater performance and cost potential are identified.

Newby, R.A.; Keairns, D.L.; Alvin, M.A.

2006-09-01T23:59:59.000Z

68

Method of recovering sulfur from the hydrogen sulfide contained in coke oven gases  

SciTech Connect

Ammonia and hydrogen sulfide are washed out of the coke oven gas and stripped from the wash liquor in the form of gases and fumes or vapors. The ammonia is decomposed in a nickel catalyzer and a small part of the decomposition gases is supplied directly to a combustion furnace, while the larger part of the combustion gases is first cooled and freed from condensate, and only then supplied to the combustion furnace. In the combustion furnace, the proportion of H/sub 2/S/SO/sub 2/ needed for the Claus process is adjusted by a partial combustion of the decomposition gases. The gases from the combustion furnace are then processed in the Claus plant to sulfur.

Laufhutte, D.

1985-04-30T23:59:59.000Z

69

Sulfide chemiluminescence detection  

DOE Green Energy (OSTI)

A method of chemiluminescently determining a sulfide which is either hydrogen sulfide or methyl mercaptan by reacting the sulfide with chlorine dioxide at low pressure and under conditions which allow a longer reaction time in emission of a single photon for every two sulfide containing species, and thereafter, chemiluminescently detecting and determining the sulfide. The invention also relates not only to the detection method, but the novel chemical reaction and a specifically designed chemiluminescence detection cell for the reaction.

Spurlin, Stanford R. (Ames, IA); Yeung, Edward S. (Ames, IA)

1985-01-01T23:59:59.000Z

70

Sulfide chemiluminescence detection  

DOE Patents (OSTI)

A method is described for chemiluminescently determining a sulfide which is either hydrogen sulfide or methyl mercaptan by reacting the sulfide with chlorine dioxide at low pressure and under conditions which allow a longer reaction time in emission of a single photon for every two sulfide containing species, and thereafter, chemiluminescently detecting and determining the sulfide. The invention also relates not only to the detection method, but the novel chemical reaction and a specifically designed chemiluminescence detection cell for the reaction. 4 figs.

Spurlin, S.R.; Yeung, E.S.

1985-11-26T23:59:59.000Z

71

Novel Composite Hydrogen-Permeable Membranes for Non-Thermal Plasma Reactors for the Decomposition of Hydrogen Sulfide  

DOE Green Energy (OSTI)

The goal of this experimental project is to design and fabricate a reactor and membrane test cell to dissociate hydrogen sulfide (H{sub 2}S) in a non-thermal plasma and recover hydrogen (H{sub 2}) through a superpermeable multi-layer membrane. Superpermeability of hydrogen atoms (H) has been reported by some researchers using membranes made of Group V transition metals (niobium, tantalum, vanadium, and their alloys), although it has yet to be confirmed in this study. A pulsed corona discharge (PCD) reactor has been fabricated and used to dissociate H{sub 2}S into hydrogen and sulfur. A nonthermal plasma cannot be produced in pure H{sub 2}S with our reactor geometry, even at discharge voltages of up to 30 kV, because of the high dielectric strength of pure H{sub 2}S ({approx}2.9 times higher than air). Therefore, H{sub 2}S was diluted in another gas with lower breakdown voltage (or dielectric strength). Breakdown voltages of H{sub 2}S in four balance gases (Ar, He, N{sub 2} and H{sub 2}) have been measured at different H{sub 2}S concentrations and pressures. Breakdown voltages are proportional to the partial pressure of H{sub 2}S and the balance gas. H{sub 2}S conversion and the reaction energy efficiency depend on the balance gas and H{sub 2}S inlet concentrations. With increasing H{sub 2}S concentrations, H{sub 2}S conversion initially increases, reaches a maximum, and then decreases. H{sub 2}S conversion in atomic balance gases, such as Ar and He, is more efficient than that in diatomic balance gases, such as N{sub 2} and H{sub 2}. These observations can be explained by the proposed reaction mechanism of H{sub 2}S dissociation in different balance gases. The results show that nonthermal plasmas are effective for dissociating H{sub 2}S into hydrogen and sulfur.

Morris D. Argyle; John F. Ackerman; Suresh Muknahallipatna; Jerry C. Hamann; Stanislaw Legowski; Guibling Zhao; Ji-Jun Zhang; Sanil John

2005-10-01T23:59:59.000Z

72

Conversion of Hydrogen Sulfide in Coal Gases to Liquid Elemental Sulfur with Monolithic Catalysts  

DOE Green Energy (OSTI)

Removal of hydrogen sulfide (H{sub 2}S) from coal gasifier gas and sulfur recovery are key steps in the development of Department of Energy's (DOE's) advanced power plants that produce electric power and clean transportation fuels with coal and natural gas. These plants will require highly clean coal gas with H{sub 2}S below 1 ppmv and negligible amounts of trace contaminants such as hydrogen chloride, ammonia, alkali, heavy metals, and particulate. The conventional method of sulfur removal and recovery employing amine, Claus, and tail-gas treatment is very expensive. A second generation approach developed under DOE's sponsorship employs hot-gas desulfurization (HGD) using regenerable metal oxide sorbents followed by Direct Sulfur Recovery Process (DSRP). However, this process sequence does not remove trace contaminants and is targeted primarily towards the development of advanced integrated gasification combined cycle (IGCC) plants that produce electricity (not both electricity and transportation fuels). There is an immediate as well as long-term need for the development of cleanup processes that produce highly clean coal gas for next generation power plants. To this end, a novel process is now under development at several research organizations in which the H{sub 2} in coal gas is directly oxidized to elemental sulfur over a selective catalyst. Such a process is ideally suited for coal gas from commercial gasifiers with a quench system to remove essentially all the trace contaminants except H{sub 2}S In the Single-Step Sulfur Recovery Process (SSRP), the direct oxidation of H{sub 2}S to elemental sulfur in the presence of SO{sub 2} is ideally suited for coal gas from commercial gasifiers with a quench system to remove essentially all the trace contaminants except H{sub 2}S. This direct oxidation process has the potential to produce a super clean coal gas more economically than both conventional amine-based processes and HGD/DSRP. The H{sub 2} and CO components of syngas appear to behave as inert with respect to sulfur formed at the SSRP conditions. One problem in the SSRP process that needs to be eliminated or minimized is COS formation that may occur due to reaction of CO with sulfur formed from the Claus reaction. The objectives of this research are to formulate monolithic catalysts for removal of H{sub 2}S from coal gases and minimum formation of COS with monolithic catalyst supports, {gamma}-alumina wash or carbon coats, and catalytic metals, to develop a catalytic regeneration method for a deactivated monolithic catalyst, to measure kinetics of both direct oxidation of H{sub 2}S to elemental sulfur with SO{sub 2} as an oxidizer and formation of COS in the presence of a simulated coal gas mixture containing H{sub 2}, CO, CO{sub 2}, and moisture, using a monolithic catalyst reactor, and to develop kinetic rate equations and model the direct oxidation process to assist in the design of large-scale plants. This heterogeneous catalytic reaction has gaseous reactants such as H{sub 2}S and SO{sub 2}. However, this heterogeneous catalytic reaction has heterogeneous products such as liquid elemental sulfur and steam. To achieve the above-mentioned objectives using a monolithic catalyst reactor, experiments on conversion of hydrogen sulfide into elemental sulfur and formation of COS were carried out for the space time range of 40-560 seconds at 120-150 C to evaluate effects of reaction temperatures, total pressure, space time, and catalyst regeneration on conversion of hydrogen sulfide into elemental sulfur and formation of COS. Simulated coal gas mixtures consist of 3,600-4,000-ppmv hydrogen sulfide, 1,800-2,000 ppmv sulfur dioxide, 23-27 v% hydrogen, 36-41 v% CO, 10-12 v% CO{sub 2}, 0-10 vol % moisture, and nitrogen as remainder. Volumetric feed rates of a simulated coal gas mixture to the reactor are 30-180 SCCM. The temperature of the reactor is controlled in an oven at 120-150 C. The pressure of the reactor is maintained at 40-210 psia. The molar ratio of H{sub 2}S to SO{sub 2} in the monolithic catalyst reactor is mai

K. C. Kwon

2006-09-30T23:59:59.000Z

73

Conversion of Hydrogen Sulfide in Coal Gases to Liquid Elemental Sulfur with Monolithic Catalysts  

DOE Green Energy (OSTI)

Removal of hydrogen sulfide (H{sub 2}S) from coal gasifier gas and sulfur recovery are key steps in the development of Department of Energy's (DOE's) advanced power plants that produce electric power and clean transportation fuels with coal and natural gas. These plants will require highly clean coal gas with H{sub 2}S below 1 ppmv and negligible amounts of trace contaminants such as hydrogen chloride, ammonia, alkali, heavy metals, and particulate. The conventional method of sulfur removal and recovery employing amine, Claus, and tail-gas treatment is very expensive. A second generation approach developed under DOE's sponsorship employs hot-gas desulfurization (HGD) using regenerable metal oxide sorbents followed by Direct Sulfur Recovery Process (DSRP). However, this process sequence does not remove trace contaminants and is targeted primarily towards the development of advanced integrated gasification combined cycle (IGCC) plants that produce electricity (not both electricity and transportation fuels). There is an immediate as well as long-term need for the development of cleanup processes that produce highly clean coal gas for next generation power plants. To this end, a novel process is now under development at several research organizations in which the H{sub 2}S in coal gas is directly oxidized to elemental sulfur over a selective catalyst. Such a process is ideally suited for coal gas from commercial gasifiers with a quench system to remove essentially all the trace contaminants except H{sub 2}S In the Single-Step Sulfur Recovery Process (SSRP), the direct oxidation of H{sub 2}S to elemental sulfur in the presence of SO{sub 2} is ideally suited for coal gas from commercial gasifiers with a quench system to remove essentially all the trace contaminants except H{sub 2}S. This direct oxidation process has the potential to produce a super clean coal gas more economically than both conventional amine-based processes and HGD/DSRP. The H{sub 2} and CO components of syngas appear to behave as inert with respect to sulfur formed at the SSRP conditions. One problem in the SSRP process that needs to be eliminated or minimized is COS formation that may occur due to reaction of CO with sulfur formed from the Claus reaction. The objectives of this research are to formulate monolithic catalysts for removal of H{sub 2}S from coal gases and minimum formation of COS with monolithic catalyst supports, {gamma}-alumina wash or carbon coats, and catalytic metals, to develop a catalytic regeneration method for a deactivated monolithic catalyst, to measure kinetics of both direct oxidation of H{sub 2}S to elemental sulfur with SO{sub 2} as an oxidizer and formation of COS in the presence of a simulated coal gas mixture containing H{sub 2}, CO, CO{sub 2}, and moisture, using a monolithic catalyst reactor, and to develop kinetic rate equations and model the direct oxidation process to assist in the design of large-scale plants. This heterogeneous catalytic reaction has gaseous reactants such as H{sub 2}S and SO{sub 2}. However, this heterogeneous catalytic reaction has heterogeneous products such as liquid elemental sulfur and steam. Experiments on conversion of hydrogen sulfide into elemental sulfur and formation of COS were carried out for the space time range of 130-156 seconds at 120-140 C to formulate catalysts suitable for the removal of H{sub 2}S and COS from coal gases, evaluate removal capabilities of hydrogen sulfide and COS from coal gases with formulated catalysts, and develop an economic regeneration method of deactivated catalysts. Simulated coal gas mixtures consist of 3,300-3,800-ppmv hydrogen sulfide, 1,600-1,900 ppmv sulfur dioxide, 18-21 v% hydrogen, 29-34 v% CO, 8-10 v% CO{sub 2}, 5-18 vol % moisture, and nitrogen as remainder. Volumetric feed rates of a simulated coal gas mixture to the reactor are 114-132 SCCM. The temperature of the reactor is controlled in an oven at 120-140 C. The pressure of the reactor is maintained at 116-129 psia. The molar ratio of H{sub 2}S to SO{sub 2} in the monolithic catalyst reactor is

K. C. Kwon

2007-09-30T23:59:59.000Z

74

Conversion of Hydrogen Sulfide in Coal Gases to Liquid Elemental Sulfur with Monolithic Catalysts  

DOE Green Energy (OSTI)

Removal of hydrogen sulfide (H{sub 2}S) from coal gasifier gas and sulfur recovery are key steps in the development of Department of Energy's (DOE's) advanced power plants that produce electric power and clean transportation fuels with coal and natural gas. These plants will require highly clean coal gas with H{sub 2}S below 1 ppmv and negligible amounts of trace contaminants such as hydrogen chloride, ammonia, alkali, heavy metals, and particulate. The conventional method of sulfur removal and recovery employing amine, Claus, and tail-gas treatment is very expensive. A second generation approach developed under DOE's sponsorship employs hot-gas desulfurization (HGD) using regenerable metal oxide sorbents followed by Direct Sulfur Recovery Process (DSRP). However, this process sequence does not remove trace contaminants and is targeted primarily towards the development of advanced integrated gasification combined cycle (IGCC) plants that produce electricity (not both electricity and transportation fuels). There is an immediate as well as long-term need for the development of cleanup processes that produce highly clean coal gas for next generation power plants. To this end, a novel process is now under development at several research organizations in which the H{sub 2}S in coal gas is directly oxidized to elemental sulfur over a selective catalyst. Such a process is ideally suited for coal gas from commercial gasifiers with a quench system to remove essentially all the trace contaminants except H{sub 2}S In the Single-Step Sulfur Recovery Process (SSRP), the direct oxidation of H{sub 2}S to elemental sulfur in the presence of SO{sub 2} is ideally suited for coal gas from commercial gasifiers with a quench system to remove essentially all the trace contaminants except H{sub 2}S. This direct oxidation process has the potential to produce a super clean coal gas more economically than both conventional amine-based processes and HGD/DSRP. The H{sub 2} and CO components of syngas appear to behave as inert with respect to sulfur formed at the SSRP conditions. One problem in the SSRP process that needs to be eliminated or minimized is COS formation that may occur due to reaction of CO with sulfur formed from the Claus reaction. The objectives of this research are to formulate monolithic catalysts for removal of H{sub 2}S from coal gases and minimum formation of COS with monolithic catalyst supports, {gamma}-alumina wash coat, and catalytic metals, to develop a regeneration method for a deactivated monolithic catalyst, to measure kinetics of both direct oxidation of H{sub 2}S to elemental sulfur with SO{sub 2} as an oxidizer and formation of COS in the presence of a simulated coal gas mixture containing H{sub 2}, CO, CO{sub 2}, and moisture, using a monolithic catalyst reactor. The task of developing kinetic rate equations and modeling the direct oxidation process to assist in the design of large-scale plants will be abandoned since formulation of catalysts suitable for the removal of H{sub 2}S and COS is being in progress. This heterogeneous catalytic reaction has gaseous reactants such as H{sub 2}S and SO{sub 2}. However, this heterogeneous catalytic reaction has heterogeneous products such as liquid elemental sulfur and steam. Experiments on conversion of hydrogen sulfide into elemental sulfur and formation of COS were carried out for the space time range of 46-570 seconds under reaction conditions to formulate catalysts suitable for the removal of H{sub 2}S and COS from coal gases and evaluate their capabilities in reducing hydrogen sulfide and COS in coal gases. Simulated coal gas mixtures consist of 3,200-4,000-ppmv hydrogen sulfide, 1,600-20,000-ppmv sulfur dioxide, 18-27 v% hydrogen, 29-41 v% CO, 8-12 v% CO{sub 2}, 0-10 vol % moisture, and nitrogen as remainder. Volumetric feed rates of simulated coal gas mixtures to the reactor are 30 - 180 cm{sup 3}/min at 1 atm and 25 C (SCCM). The temperature of the reactor is controlled in an oven at 120-155 C. The pressure of the reactor is maintained at 40-210 psia. The molar ratio

K.C. Kwon

2009-09-30T23:59:59.000Z

75

Influence of technological factors on statics of hydrogen sulfide absorption from coke-oven gas by the ammonia process  

SciTech Connect

The basic technological factors that determine the effectiveness of hydrogen sulfide absorption from coke-oven gas by the cyclic ammonia process are the initial H/sub 2/S content of the gas, the degree of purification, the absorption temperature and the NH/sub 3/ and CO/sub 2/ contents of the absorbent solution. The effects of these factors on the statics of hydrogen sulfide absorption are studied. The investigation is based on the phase-equilibrium distributions of components in the absorption-desorption gas-cleaning cycle. The mathematical model is presented which includes the solution of a system of chemical equilibrium equations for reactions in the solution, material balances, and electrical neutrality. 4 references, 5 figures, 1 table.

Nazarov, V.G.; Kamennykh, B.M.; Rus'yanov, N.D.

1983-01-01T23:59:59.000Z

76

Novel Composite Hydrogen-Permeable Membranes for Non-Thermal Plasma Reactors for the Decomposition of Hydrogen Sulfide  

DOE Green Energy (OSTI)

The goal of this experimental project is to design and fabricate a reactor and membrane test cell to dissociate hydrogen sulfide (H{sub 2}S) in a non-thermal plasma and recover hydrogen (H{sub 2}) through a superpermeable multi-layer membrane. Superpermeability of hydrogen atoms (H) has been reported by some researchers using membranes made of Group V transition metals (niobium, tantalum, vanadium, and their alloys), although it has yet to be confirmed in this study. Several pulsed corona discharge (PCD) reactors have been fabricated and used to dissociate H{sub 2}S into hydrogen and sulfur. Visual observation shows that the corona is not uniform throughout the reactor. The corona is stronger near the top of the reactor in argon, while nitrogen and mixtures of argon or nitrogen with H{sub 2}S produce stronger coronas near the bottom of the reactor. Both of these effects appear to be explainable base on the different electron collision interactions with monatomic versus polyatomic gases. A series of experiments varying reactor operating parameters, including discharge capacitance, pulse frequency, and discharge voltage were performed while maintaining constant power input to the reactor. At constant reactor power input, low capacitance, high pulse frequency, and high voltage operation appear to provide the highest conversion and the highest energy efficiency for H{sub 2}S decomposition. Reaction rates and energy efficiency per H{sub 2}S molecule increase with increasing flow rate, although overall H{sub 2}S conversion decreases at constant power input. Voltage and current waveform analysis is ongoing to determine the fundamental operating characteristics of the reactors. A metal infiltrated porous ceramic membrane was prepared using vanadium as the metal and an alumina tube. Experiments with this type of membrane are continuing, but the results thus far have been consistent with those obtained in previous project years: plasma driven permeation or superpermeability has not been observed. A new test cell specially designed to test the membranes has been constructed to provide basic science data on superpermeability.

Morris D. Argyle; John F. Ackerman; Suresh Muknahallipatna; Jerry C. Hamann; Stanislaw Legowski; Guibing Zhao; Sanil John

2006-09-30T23:59:59.000Z

77

NOVEL COMPOSITE HYDROGEN-PERMEABLE MEMBRANES FOR NON-THERMAL PLASMA REACTORS FOR THE DECOMPOSITION OF HYDROGEN SULFIDE  

DOE Green Energy (OSTI)

The goal of this experimental project is to design and fabricate a reactor and membrane test cell to dissociate hydrogen sulfide (H{sub 2}S) in a non-thermal plasma and recover hydrogen (H{sub 2}) through a superpermeable multi-layer membrane. Superpermeability of hydrogen atoms (H) has been reported by some researchers using membranes made of Group V transition metals (niobium, tantalum, vanadium, and their alloys), although it has yet to be confirmed in this study. Experiments involving methane conversion reactions were conducted with a preliminary pulsed corona discharge reactor design in order to test and improve the reactor and membrane designs using a non-toxic reactant. This report details the direct methane conversion experiments to produce hydrogen, acetylene, and higher hydrocarbons utilizing a co-axial cylinder (CAC) corona discharge reactor, pulsed with a thyratron switch. The reactor was designed to accommodate relatively high flow rates (655 x 10{sup -6} m{sup 3}/s) representing a pilot scale easily converted to commercial scale. Parameters expected to influence methane conversion including pulse frequency, charge voltage, capacitance, residence time, and electrode material were investigated. Conversion, selectivity and energy consumption were measured or estimated. C{sub 2} and C{sub 3} hydrocarbon products were analyzed with a residual gas analyzer (RGA). In order to obtain quantitative results, the complex sample spectra were de-convoluted via a linear least squares method. Methane conversion as high as 51% was achieved. The products are typically 50%-60% acetylene, 20% propane, 10% ethane and ethylene, and 5% propylene. First Law thermodynamic energy efficiencies for the system (electrical and reactor) were estimated to range from 38% to 6%, with the highest efficiencies occurring at short residence time and low power input (low specific energy) where conversion is the lowest (less than 5%). The highest methane conversion of 51% occurred at a residence time of 18.8 s with a flow rate of 39.4 x 10{sup -6} m{sup 3}/s (5 ft{sup 3}/h) and a specific energy of 13,000 J/l using niobium and platinum coated stainless steel tubes as cathodes. Under these conditions, the First Law efficiency for the system was 8%. Under similar reaction conditions, methane conversions were {approx}50% higher with niobium and platinum coated stainless steel cathodes than with a stainless steel cathode.

Morris D. Argyle; John F. Ackerman; Suresh Muknahallipatna; Jerry C. Hamann; Stanislaw Legowski; Ji-Jun Zhang; Guibing Zhao; Robyn J. Alcanzare; Linna Wang; Ovid A. Plumb

2004-07-01T23:59:59.000Z

78

Retrofitting existing chemical scrubbers to biotrickling filters for H2S emission control  

E-Print Network (OSTI)

Retrofitting existing chemical scrubbers to biotrickling filters for H2S emission control David Gabriel* and Marc A. Deshusses Department of Chemical and Environmental Engineering, University required much larger reactor volumes than chemical scrubbers. We converted an existing full-scale chem

79

Control of hydrogen sulfide emission from geothermal power plants. Volume I. Summary of results. Final report  

DOE Green Energy (OSTI)

A program of laboratory and pilot plant tests, detailed process and project engineering work, and process engineering and economic evaluation studies has been carried out in support of the design of a test facility for demonstration of the copper sulfate process for the removal of hydrogen sulfide from geothermal steam at turbine upstream conditions. A demonstration plant has been designed which is capable of removing 99% of the H/sub 2/S, 90% of the NH/sub 3/, and significant amounts of H/sub 3/BO/sub 3/ and particulates from 100,000 lb/hr of geothermal steam of The Geysers composition. Criteria for the mechanical and process design of the scrubber have been confirmed in field tests of fifty hours duration on an eight-inch diameter scrubber at PG and E's Unit No. 7, The Geysers. The background of the problem and the technical approach to its solution, the scope and results of the first-phase laboratory testing, the scope and results of the experimental and analytical studies carried out in the second phase, and a description of the configuration of the demonstration plant and the test plan for its operation are summarized. (MHR)

Brown, F.C.; Harvey, W.W.; Warren, R.B.

1979-01-01T23:59:59.000Z

80

Water vapour H2O 0.3 Hydrogen Sulphide H2S Traces  

E-Print Network (OSTI)

A system approach to biogas technology from "Biogas technology: a training manual for extension " (FAO/CMS, 1996) Components of a biogas system Biogas technology is a complete system in itself with its set objectives (cost effective production of energy and soil nutrients), factors such as microbes, plant design, construction materials, climate, chemical and microbial characteristics of inputs, and the inter-relationships among these factors. Brief discussions on each of these factors or subsystems are presented in this section. Biogas This is the mixture of gas produced by methanogenic bacteria while acting upon biodegradable materials in an anaerobic condition. Biogas is mainly composed of 50 to 70 percent methane, 30 to 40 percent carbon dioxide (CO2) and low amount of other gases as shown in Table 1.

Source Yadav

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems  

E-Print Network (OSTI)

characterization of produced water from four offshore oilOrganic matrix in produced water from the Osage-Skiatookfrom sulfide-rich produced water using gas chromatography/

Zheng, L.

2011-01-01T23:59:59.000Z

82

Production of hydrogen in non oxygen-evolving systems: co-produced hydrogen as a bonus in the photodegradation of organic pollutants and hydrogen sulfide  

DOE Green Energy (OSTI)

This report was prepared as part of the documentation of Annex 10 (Photoproduction of Hydrogen) of the IEA Hydrogen Agreement. Subtask A of this Annex concerned photo-electrochemical hydrogen production, with an emphasis on direct water splitting. However, studies of non oxygen-evolving systems were also included in view of their interesting potential for combined hydrogen production and waste degradation. Annex 10 was operative from 1 March 1995 until 1 October 1998. One of the collaborative projects involved scientists from the Universities of Geneva and Bern, and the Federal Institute of Technology in Laussane, Switzerland. A device consisting of a photoelectrochemical cell (PEC) with a WO{sub 3} photoanode connected in series with a so-called Grazel cell (a dye sensitized liquid junction photovoltaic cell) was developed and studied in this project. Part of these studies concerned the combination of hydrogen production with degradation of organic pollutants, as described in Chapter 3 of this report. For completeness, a review of the state of the art of organic waste treatment is included in Chapter 2. Most of the work at the University of Geneva, under the supervision of Prof. J. Augustynski, was focused on the development and testing of efficient WO{sub 3} photoanodes for the photoelectrochemical degradation of organic waste solutions. Two types of WO{sub 3} anodes were developed: non transparent bulk photoanodes and non-particle-based transparent film photoanodes. Both types were tested for degradation and proved to be very efficient in dilute solutions. For instance, a solar-to-chemical energy conversion efficiency of 9% was obtained by operating the device in a 0.01M solution of methanol (as compared to about 4% obtained for direct water splitting with the same device). These organic compounds are oxidized to CO{sub 2} by the photocurrent produced by the photoanode. The advantages of this procedure over conventional electrolytic degradation are that much (an order of magnitude) less energy is required and that sunlight can be used directly. In the case of photoproduction of hydrogen, as compared to water splitting, feeding the anodic compartment of the PEC with an organic pollutant, instead of the usual supporting electrolyte, will bring about a substantial increase of the photocurrent at a given illumination. Thus, the replacement of the photo-oxidation of water by the photodegradation of organic waste will be accompanied by a gain in solar-to-chemical conversion efficiency and hence by a decrease in the cost of the photoproduced hydrogen. Taking into account the benefits and possible revenues obtainable by the waste degradation, this would seem to be a promising approach to the photoproduction of hydrogen. Hydrogen sulfide (H{sub 2}S) is another waste effluent requiring extensive treatment, especially in petroleum refineries. The so-called Claus process is normally used to convert the H{sub 2}S to elemental sulfur. A sulfur recovery process developed at the Florida Solar Energy Center is described briefly in Chapter 4 by Dr. C. Linkous as a typical example of the photoproduction of hydrogen in a non oxygen-evolving system. The encouraging results obtained in these investigations of photoelectrochemical hydrogen production combined with organic waste degradation, have prompted a decision to continue the work under the new IEA Hydrogen Agreement Annex 14, Photoelectrolytic Hydrogen Production.

Sartoretti, C. Jorand; Ulmann, M.; Augustynski, J. (Electrochemistry Laboratory, Department of Chemistry, University of Geneva (CH)); Linkous, C.A. (Florida Solar Energy Center, University of Central Florida (US))

2000-01-01T23:59:59.000Z

83

Stability and Reactivity of Iron Sulfide Films in Sour Environments  

Science Conference Proceedings (OSTI)

Abstract Scope, Iron sulfide scales form on steels in the presence of H2S, notably in the extreme environments that exist in the oil and gas fields. Our research ...

84

Selective Catalytic Oxidation of Hydrogen Sulfide to Elemental Sulfur from Coal-Derived Fuel Gases  

SciTech Connect

The development of low cost, highly efficient, desulfurization technology with integrated sulfur recovery remains a principle barrier issue for Vision 21 integrated gasification combined cycle (IGCC) power generation plants. In this plan, the U. S. Department of Energy will construct ultra-clean, modular, co-production IGCC power plants each with chemical products tailored to meet the demands of specific regional markets. The catalysts employed in these co-production modules, for example water-gas-shift and Fischer-Tropsch catalysts, are readily poisoned by hydrogen sulfide (H{sub 2}S), a sulfur contaminant, present in the coal-derived fuel gases. To prevent poisoning of these catalysts, the removal of H{sub 2}S down to the parts-per-billion level is necessary. Historically, research into the purification of coal-derived fuel gases has focused on dry technologies that offer the prospect of higher combined cycle efficiencies as well as improved thermal integration with co-production modules. Primarily, these concepts rely on a highly selective process separation step to remove low concentrations of H{sub 2}S present in the fuel gases and produce a concentrated stream of sulfur bearing effluent. This effluent must then undergo further processing to be converted to its final form, usually elemental sulfur. Ultimately, desulfurization of coal-derived fuel gases may cost as much as 15% of the total fixed capital investment (Chen et al., 1992). It is, therefore, desirable to develop new technology that can accomplish H{sub 2}S separation and direct conversion to elemental sulfur more efficiently and with a lower initial fixed capital investment.

Gardner, Todd H.; Berry, David A.; Lyons, K. David; Beer, Stephen K.; Monahan, Michael J.

2001-11-06T23:59:59.000Z

85

The Design and Implementation of Monitoring System for H2S Gas Volume Fraction with Virtual Instrument  

Science Conference Proceedings (OSTI)

H2S is a kind of poisonous gas that exist in oil, chemical production process. The detection of H2S plays an important role in mine, oil and gas exploration, production of chemical product, control of atmosphere environment. The monitoring system for ...

Wenlian Li; Chuanqing Liu; Yang Li; Fang Xiao

2008-12-01T23:59:59.000Z

86

High Temperature Electrochemical Polishing of H(2)S from Coal Gasification. Quarterly progress report, April 1-June 30, 1997  

DOE Green Energy (OSTI)

An advanced process for the separation of hydrogen sulfide from coal gasification streams through an electrochemical membrane is being perfected. H{sub 2}S is removed from a synthetic gas stream, split into hydrogen, which enriches the exiting syngas, and sulfur, which is condensed downstream from an inert sweep gas stream. The process allows for continuous removal of H{sub 2}S without cooling the gas stream while allowing negligible pressure loss through the separator. Moreover, the process is economically attractive due to the elimination of the need for a Claus process for sulfur recovery. To this extent the project presents a novel concept for improving utilization of coal for more efficient power generation.

Winnick, J.

1997-12-31T23:59:59.000Z

87

Kinetics of Direct Oxidation of H2S in Coal Gas to Elemental Sulfur  

SciTech Connect

Removal of hydrogen sulfide (H{sub 2}S) from coal gasifier gas and sulfur recovery are key steps in the development of Department of Energy's (DOE's) advanced Vision 21 plants that produce electric power and clean transportation fuels with coal and natural gas. These Vision 21 plants will require highly clean coal gas with H{sub 2}S below 1 ppm and negligible amounts of trace contaminants such as hydrogen chloride, ammonia, alkali, heavy metals, and particulate. The conventional method of sulfur removal and recovery employing amine, Claus, and tail-gas treatment is very expensive. A second generation approach developed under DOE's sponsorship employs hot-gas desulfurization (HGD) using regenerable metal oxide sorbents followed by Direct Sulfur Recovery Process (DSRP). However, this process sequence does not remove trace contaminants and is targeted primarily towards the development of advanced integrated gasification combined cycle (IGCC) plants that produce electricity (not both electricity and transportation fuels). There is an immediate as well as long-term need for the development of cleanup processes that produce highly clean coal gas for next generation Vision 21 plants. To this end, a novel process is now under development at several research organizations in which the H{sub 2}S in coal gas is directly oxidized to elemental sulfur over a selective catalyst. Such a process is ideally suited for coal gas from commercial gasifiers with a quench system to remove essentially all the trace contaminants except H{sub 2}S. The direct oxidation of H{sub 2}S to elemental sulfur in the presence of SO{sub 2} is ideally suited for coal gas from commercial gasifiers with a quench system to remove essentially all the trace contaminants except H{sub 2}S. This direct oxidation process has the potential to produce a super clean coal gas more economically than both conventional amine-based processes and HGD/DSRP. The objectives of this research are to measure kinetics of direct oxidation of H{sub 2}S to elemental sulfur in the presence of a simulated coal gas mixture containing SO{sub 2}, H{sub 2}, and moisture, using 160-{micro}m C-500-04 alumina catalyst particles and 400 square cells/inch{sup 2}, {gamma}-Al{sub 2}O{sub 3}-wash-coated monolithic catalyst, and various reactors such as a micro packed-bed reactor, a micro bubble reactor, and a monolithic catalyst reactor, and to develop kinetic rate equations and model the direct oxidation process to assist in the design of large-scale plants. This heterogeneous catalytic reaction has gaseous reactants such as H{sub 2}S and SO{sub 2}. However, this heterogeneous catalytic reaction has heterogeneous products such as liquid elemental sulfur and steam.

K.C. Kwon

2005-11-01T23:59:59.000Z

88

Evaluation of Thiosulfate as a Substitute for H2S in Sour Corrosion ...  

Science Conference Proceedings (OSTI)

Environmentally Assisted Cracking of Carbon Steel in High Temperature Geothermal Well · Evaluation of the Susceptibility to Hydrogen Assisted Cracking in ...

89

Combined Theoretical and Experimental Investigation and Design of H2S Tolerant Anode for Solid Oxide Fuel Cells  

DOE Green Energy (OSTI)

A solid oxide fuel cell (SOFC) is a high temperature fuel cell and it normally operates in the range of 850 to 1000 C. Coal syngas has been considered for use in SOFC systems to produce electric power, due to its high temperature and high hydrogen and carbon monoxide content. However, coal syngas also has contaminants like carbon dioxide (CO{sub 2}) and hydrogen sulfide (H{sub 2}S). Among these contaminants, H{sub 2}S is detrimental to electrode material in SOFC. Commonly used anode material in SOFC system is nickel-yttria stabilized zirconia (Ni-YSZ). The presence of H{sub 2}S in the hydrogen stream will damage the Ni anode and hinder the performance of SOFC. In the present study, an attempt was made to understand the mechanism of anode (Ni-YSZ) deterioration by H{sub 2}S. The study used computation methods such as quantum chemistry calculations and molecular dynamics to predict the model for anode destruction by H{sub 2}S. This was done using binding energies to predict the thermodynamics and Raman spectroscopy to predict molecular vibrations and surface interactions. On the experimental side, a test stand has been built with the ability to analyze button cells at high temperature under syngas conditions.

Gerardine G. Botte; Damilola Daramola; Madhivanan Muthuvel

2009-01-07T23:59:59.000Z

90

Control of hydrogen sulfide emission from geothermal power plants. Volume III. Final report: demonstration plant equipment descriptions, test plan, and operating instructions  

DOE Green Energy (OSTI)

The elements of the final, detailed design of the demonstration plant for the copper sulfate process for the removal of hydrogen sulfide from geothermal steam are summarized. Descriptions are given of all items of equipment in sufficient detail that they can serve as purchase specifications. The process and mechanical design criteria which were used to develop the specifications, and the process descriptions and material and energy balance bases to which the design criteria were applied are included. (MHR)

Brown, F.C.; Harvey, W.W.; Warren, R.B.

1977-01-01T23:59:59.000Z

91

Production of Hydrogen by Superadiabatic Decomposition of Hydrogen Sulfide - Final Technical Report for the Period June 1, 1999 - September 30, 2000  

DOE Green Energy (OSTI)

The objective of this program is to develop an economical process for hydrogen production, with no additional carbon dioxide emission, through the thermal decomposition of hydrogen sulfide (H{sub 2}S) in H{sub 2}S-rich waste streams to high-purity hydrogen and elemental sulfur. The novel feature of the process being developed is the superadiabatic combustion (SAC) of part of the H{sub 2}S in the waste stream to provide the thermal energy required for the decomposition reaction such that no additional energy is required. The program is divided into two phases. In Phase 1, detailed thermochemical and kinetic modeling of the SAC reactor with H{sub 2}S-rich fuel gas and air/enriched air feeds is undertaken to evaluate the effects of operating conditions on exit gas products and conversion efficiency, and to identify key process parameters. Preliminary modeling results are used as a basis to conduct a thorough evaluation of SAC process design options, including reactor configuration, operating conditions, and productivity-product separation schemes, with respect to potential product yields, thermal efficiency, capital and operating costs, and reliability, ultimately leading to the preparation of a design package and cost estimate for a bench-scale reactor testing system to be assembled and tested in Phase 2 of the program. A detailed parametric testing plan was also developed for process design optimization and model verification in Phase 2. During Phase 2 of this program, IGT, UIC, and industry advisors UOP and BP Amoco will validate the SAC concept through construction of the bench-scale unit and parametric testing. The computer model developed in Phase 1 will be updated with the experimental data and used in future scale-up efforts. The process design will be refined and the cost estimate updated. Market survey and assessment will continue so that a commercial demonstration project can be identified.

Rachid B. Slimane; Francis S. Lau; Javad Abbasian

2000-10-01T23:59:59.000Z

92

Chemical Engineering Journal 87 (2002) 101110 Co-treatment of H2S and toluene in a biotrickling filter  

E-Print Network (OSTI)

regulations are forc- ing POTWs to treat their off-gases. In most cases, treatment is accomplished in caustic,7]. The contaminants are absorbed and de- graded by naturally occurring mixed cultures immobilized on the packing filter which pH is allowed to decrease as a result of sulfate accumulation. The H2S-free off-gas

93

Influence of pp ions on pion absorption in H2 S. Jonsell,1  

E-Print Network (OSTI)

, Box 518, S-751 20 Uppsala, Sweden 2 Department of Nuclear and Reactor Physics, Royal Institute the strong-force aspects of the nuclear pion absorp- tion by the hydrogen nuclei. The present paper addresses of the standard weak interaction theory through comparisons of the predicted decay rate with experi- mental

94

Batch slurry photocatalytic reactors for the generation of hydrogen from sulfide and sulfite waste streams under solar irradiation  

SciTech Connect

In this study, two solar slurry photocatalytic reactors i.e., batch reactor (BR) and batch recycle reactor with continuous supply of inert gas (BRRwCG) were developed for comparing their performance. The performance of the photocatalytic reactors were evaluated based on the generation of hydrogen (H{sub 2}) from water containing sodium sulfide (Na{sub 2}S) and sodium sulfite (Na{sub 2}SO{sub 3}) ions. The photoreactor of capacity 300 mL was developed with UV-vis transparent walls. The catalytic powders ((CdS/ZnS)/Ag{sub 2}S + (RuO{sub 2}/TiO{sub 2})) were kept suspended by means of magnetic stirrer in the BR and gas bubbling and recycling of the suspension in the BRRwCG. The rate constant was found to be 120.86 (einstein{sup -1}) for the BRRwCG whereas, for the BR it was found to be only 10.92 (einstein{sup -1}). The higher rate constant was due to the fast desorption of products and suppression of e{sup -}/h{sup +} recombination. (author)

Priya, R.; Kanmani, S. [Centre for Environmental Studies, Anna University, Chennai (India)

2009-10-15T23:59:59.000Z

95

Apparatus for use in sulfide chemiluminescence detection  

DOE Patents (OSTI)

A method is described for chemiluminescently determining a sulfide which is either hydrogen sulfide or methyl mercaptan by reacting the sulfide with chlorine dioxide at low pressure and under conditions which allow a longer reaction time in emission of a single photon for every two sulfide containing species, and thereafter, chemiluminescently detecting and determining the sulfide. The invention also relates not only to the detection method, but the novel chemical reaction and a specifically designed chemiluminescence detection cell for the reaction. 4 figs.

Spurlin, S.R.; Yeung, E.S.

1987-01-06T23:59:59.000Z

96

Apparatus for use in sulfide chemiluminescence detection  

DOE Green Energy (OSTI)

A method of chemiluminescently determining a sulfide which is either hydrogen sulfide or methyl mercaptan by reacting the sulfide with chlorine dioxide at low pressure and under conditions which allow a longer reaction time in emission of a single photon for every two sulfide containing species, and thereafter, chemiluminescently detecting and determining the sulfide. The invention also relates not only to the detection method, but the novel chemical reaction and a specifically designed chemiluminescence detection cell for the reaction.

Spurlin, Stanford R. (Ames, IA); Yeung, Edward S. (Ames, IA)

1987-01-01T23:59:59.000Z

97

Impact of hydrogen and oxygen defects on the lattice parameter of chemical vapor deposited zinc sulfide  

SciTech Connect

The lattice parameter of cubic chemical vapor deposited (CVD) ZnS with measured oxygen concentrations < 0.6 at.% and hydrogen impurities of < 0.015 at.% have been measured and found to vary between -0.10% and +0.09% relative to the reference lattice parameter (5.4093 Å) of oxygen-free cubic ZnS as reported in the literature. Defects other than substitutional O must be invoked to explain these observed volume changes. The structure and thermodynamic stability of a wide range of native and impurity induced defects in ZnS have been determined by Ab initio calculations. Lattice contraction is caused by S-vacancies, substitutional O on S sites, Zn vacancies, H in S vacancies, peroxy defects, and dissociated water in S-vacancies. The lattice is expanded by interstitial H, H in Zn vacancies, dihydroxy defects, interstitial oxygen, Zn and [ZnHn] complexes (n=1,…,4), interstitial Zn, and S2 dumbbells. Oxygen, though present, likely forms substitutional defects for sulfur resulting in lattice contraction rather than as interstitial oxygen resulting in lattice expansion. It is concluded based on measurement and calculations that excess zinc atoms either at anti-sites (i.e. Zn atoms on S-sites) or possibly as interstitial Zn are responsible for the relative increase of the lattice parameter of commercially produced CVD ZnS.

McCloy, John S.; Wolf, Walter; Wimmer, Erich; Zelinski, Brian

2013-01-09T23:59:59.000Z

98

Zinc sulfide liquefaction catalyst  

DOE Patents (OSTI)

A process for the liquefaction of carbonaceous material, such as coal, is set forth wherein coal is liquefied in a catalytic solvent refining reaction wherein an activated zinc sulfide catalyst is utilized which is activated by hydrogenation in a coal derived process solvent in the absence of coal.

Garg, Diwakar (Macungie, PA)

1984-01-01T23:59:59.000Z

99

Available Technologies: Low Power, Lightweight Nanoparticle ...  

APPLICATIONS OF TECHNOLOGY: Monitoring harmful hydrogen sulfide (H2S) gas emissions from. Oil and natural gas extraction and distribution

100

Summary of research on hydrogen production from fossil fuels conducted at NETL  

DOE Green Energy (OSTI)

In this presentation we will summarize the work performed at NETL on the production of hydrogen via partial oxidation/dry reforming of methane and catalytic decomposition of hydrogen sulfide. We have determined that high pressure resulted in greater carbon formation on the reforming catalysts, lower methane and CO2 conversions, as well as a H2/CO ratio. The results also showed that Rh/alumina catalyst is the most resistant toward carbon deposition both at lower and at higher pressures. We studied the catalytic partial oxidation of methane over Ni-MgO solid solutions supported on metal foams and the results showed that the foam-supported catalysts reach near-equilibrium conversions of methane and H2/CO selectivities. The rates of carbon deposition differ greatly among the catalysts, varying from 0.24 mg C/g cat h for the dipped foams to 7.0 mg C/g cat h for the powder-coated foams, suggesting that the exposed Cr on all of the foam samples may interact with the Ni-MgO catalyst to kinetically limit carbon formation. Effects of sulfur poisoning on reforming catalysts were studies and pulse sulfidation of catalyst appeared to be reversible for some of the catalysts but not for all. Under pulse sulfidation conditions, the 0.5%Rh/alumina and NiMg2Ox-1100ºC (solid solution) catalysts were fully regenerated after reduction with hydrogen. Rh catalyst showed the best overall activity, less carbon deposition, both fresh and when it was exposed to pulses of H2S. Sulfidation under steady state conditions significantly reduced catalyst activity. Decomposition of hydrogen sulfide into hydrogen and sulfur was studied over several supported metal oxides and metal oxide catalysts at a temperature range of 650-850°C. H2S conversions and effective activation energies were estimated using Arrhenius plots. The results of these studies will further our understanding of catalytic reactions and may help in developing better and robust catalysts for the production of hydrogen from fossil fuels

Shamsi, Abolghasem

2008-03-30T23:59:59.000Z

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

Demonstration of EIC's copper sulfate process for removal of hydrogen sulfide and other trace contaminants from geothermal steam at turbine inlet temperatures and pressures. Final report  

DOE Green Energy (OSTI)

The results obtained during the operation of an integrated, one-tenth commercial scale pilot plant using EIC's copper sulfate process for the removal of hydrogen sulfide and other contaminants from geothermal steam at turbine upstream conditions are discussed. The tests took place over a six month period at Pacific Gas and Electric Company's Unit No. 7 at The Geysers Power Plant. These tests were the final phase of a development effort which included the laboratory research and engineering design work which led to the design of the pilot plant. Broadly, the objectives of operating the pilot plant were to confirm the preliminary design criteria which had been developed, and provide data for their revisions, if appropriate, in a plant which contained all the elements of a commercial process using equipment of a size sufficient to provide valid scale-up data. The test campaign was carried out in four phases: water testing; open circuit, i.e., non integrated scrubbing, liquid-solid separation and regeneration testing; closed circuit short term; and closed circuit long term testing.

Not Available

1980-05-01T23:59:59.000Z

102

Alkaline Biofiltration of H2S Odors A R M A N D O G O N Z A L E Z -S A N C H E Z , ,  

E-Print Network (OSTI)

, and biogas production. Its distinct rotten eggs smell can be detected in air at levels lower than 1 ppbv. H2S biotreatment approach has been developed for the removal of H2S from biogas (10, 11). It consists of two steps

103

Modification of the EIC hydrogen sulfide abatement process to produce valuable by-products. Final report, May 4, 1981-May 4, 1982  

DOE Green Energy (OSTI)

A program of analytical and experimental studies has been carried out to develop modifications of the CUPROSUL process for the desulfurization of geothermal steam. The objective of the program was to devise practical means to manipulate the chemistry of the process so that the consumption of raw materials could be controlled and a variety of valuable by-products could be produced. The process had been demonstrated, at one-tenth commercial scale, for steam of the Geysers' average composition in a configuration which resulted in essentially complete oxidation of sulfide to sulfate. The ability to control the extent of oxidation would increase process flexibility and extend its range of applicability to steams of widely varying composition. Preliminary market surveys of raw materials required for the process and by-products which could be produced indicated that controlling the oxidation of sulfides to produce elemental sulfur would probably be the preferred process option. Use of lime to treat sulfate-containing purge streams to produce by-product gypsum and ammonia for recycle or sale could also be justified for certain steam compositions. Recovery of ammonium sulfate alone from the purge stream would not normally be justified unless corecovery of other valuable by-products, such as boric acid, was possible at incremental cost. It was found that ferric sulfate was a highly effective, selective oxidant for the controlled oxidation of copper sulfide solids to produce elemental sulfur for sale and copper sulfate for recycle.

Offenhartz, P. O'D.

1982-06-01T23:59:59.000Z

104

Cadmium sulfide membranes  

DOE Patents (OSTI)

A method is described for the creation of novel q-effect cadmium sulfide membranes. The membranes are made by first creating a dilute cadmium sulfide colloid in aqueous suspension and then removing the water and excess salts therefrom. The cadmium sulfide membrane thus produced is luminescent at room temperature and may have application in laser fabrication.

Spanhel, Lubomir (Madison, WI); Anderson, Marc A. (Madison, WI)

1992-07-07T23:59:59.000Z

105

Cadmium sulfide membranes  

DOE Patents (OSTI)

A method is described for the creation of novel q-effect cadmium sulfide membranes. The membranes are made by first creating a dilute cadmium sulfide colloid in aqueous suspension and then removing the water and excess salts therefrom. The cadmium sulfide membrane thus produced is luminescent at room temperature and may have application in laser fabrication.

Spanhel, Lubomir (Madison, WI); Anderson, Marc A. (Madison, WI)

1991-10-22T23:59:59.000Z

106

Hydrogen  

U.S. Energy Information Administration (EIA)

-No Data Reported; --= Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Notes: Hydrogen production ...

107

Investigation on Durability and Reactivity of Promising Metal Oxide Sorbents During Sulfidation and Regeneration  

SciTech Connect

Research activities and efforts of this research project were concentrated on formulating various metal oxide sorbents with various additives under various formulation conditions, conducting experiments on initial reactivity of formulated sorbents with hydrogen sulfide, and testing hardness of formulated sorbents. Experiments on reactivity of formulated metal oxide sorbents with wet hydrogen sulfide contained in a simulated coal gas mixture were carried out for 120 seconds at 550 o C (see Table 1) to evaluate reactivity of formulated sorbents with hydrogen sulfide. Hardness of formulated sorbents was evaluated in addition to testing their reactivity with hydrogen sulfide. A typical simulated coal gas mixture consists of 9107-ppm hydrogen sulfide (0.005 g; 1 wt %), 0.085-g water (15.84 wt %), 0.0029-g hydrogen (0.58 wt %), and 0.4046-g nitrogen (81.34 wt%).

K. C. Kwon

1997-05-01T23:59:59.000Z

108

Molybdenum sulfide/carbide catalysts  

DOE Patents (OSTI)

The present invention provides methods of synthesizing molybdenum disulfide (MoS.sub.2) and carbon-containing molybdenum disulfide (MoS.sub.2-xC.sub.x) catalysts that exhibit improved catalytic activity for hydrotreating reactions involving hydrodesulfurization, hydrodenitrogenation, and hydrogenation. The present invention also concerns the resulting catalysts. Furthermore, the invention concerns the promotion of these catalysts with Co, Ni, Fe, and/or Ru sulfides to create catalysts with greater activity, for hydrotreating reactions, than conventional catalysts such as cobalt molybdate on alumina support.

Alonso, Gabriel (Chihuahua, MX); Chianelli, Russell R. (El Paso, TX); Fuentes, Sergio (Ensenada, MX); Torres, Brenda (El Paso, TX)

2007-05-29T23:59:59.000Z

109

Process for hydrogenating coal and coal solvents  

SciTech Connect

A novel process is described for the hydrogenation of coal by the hydrogenation of a solvent for the coal in which the hydrogenation of the coal solvent is conducted in the presence of a solvent hydrogenation catalyst of increased activity, wherein the hydrogenation catalyst is produced by reacting ferric oxide with hydrogen sulfide at a temperature range of 260.degree. C. to 315.degree. C. in an inert atmosphere to produce an iron sulfide hydrogenation catalyst for the solvent. Optimally, the reaction temperature is 275.degree. C. Alternately, the reaction can be conducted in a hydrogen atmosphere at 350.degree. C.

Tarrer, Arthur R. (Auburn, AL); Shridharani, Ketan G. (Auburn, AL)

1983-01-01T23:59:59.000Z

110

Hydrogen sulfide conversion with nanophase titania  

DOE Patents (OSTI)

A process for disassociating H.sub.2 S in a gaseous feed using an improved catalytic material in which the feed is contacted at a temperature of at least about 275.degree. C. with a catalyst of rutile nanocrystalline titania having grain sizes in the range of from about 1 to about 100 nanometers. Other transition metal catalysts are disclosed, each of nanocrystalline material with grain sizes in the 1-100 nm range.

Beck, Donald D. (Rochester Hills, MI); Siegel, Richard W. (Hinsdale, IL)

1996-01-01T23:59:59.000Z

111

Hydrogen sulfide conversion with nanophase titania  

DOE Patents (OSTI)

A process is described for disassociating H{sub 2}S in a gaseous feed using an improved catalytic material in which the feed is contacted at a temperature of at least about 275 C with a catalyst of rutile nanocrystalline titania having grain sizes in the range of from about 1 to about 100 nanometers. Other transition metal catalysts are disclosed, each of nanocrystalline material with grain sizes in the 1-100 nm range. 5 figs.

Beck, D.D.; Siegel, R.W.

1996-08-20T23:59:59.000Z

112

CX-002903: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Exclusion Determination CX-002903: Categorical Exclusion Determination High-Temperature Nano-Derived Micro-H2 (Hydrogen) and -H2S (Hydrogen Sulfide) Sensors CX(s) Applied: B3.6...

113

Page not found | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Download CX-002903: Categorical Exclusion Determination High-Temperature Nano-Derived Micro-H2 (Hydrogen) and -H2S (Hydrogen Sulfide) Sensors CX(s) Applied: B3.6...

114

HYDROGEN SEPARATION MEMBRANES  

DOE Green Energy (OSTI)

A likely membrane for future testing of high-temperature hydrogen separation from a gasification product stream was targeted as an inorganic analog of a dense-metal membrane, where the hydrogen would dissolve into and diffuse through the membrane structure. An amorphous membrane such as zinc sulfide appeared to be promising. Previously, ZnS film coating tests had been performed using an electron-beam vacuum coating instrument, with zinc films successfully applied to glass substrates. The coatings appeared relatively stable in air and in a simple simulated gasification atmosphere at elevated temperature. Because the electron-beam coating instrument suffered irreparable breakdown, several alternative methods were tested in an effort to produce a nitrogen-impermeable, hydrogen-permeable membrane on porous sintered steel substrates. None of the preparation methods proved successful in sealing the porous substrate against nitrogen gas. To provide a nitrogen-impermeable ZnS material to test for hydrogen permeability, two ZnS infrared sample windows were purchased. These relatively thick ''membranes'' did not show measurable permeation of hydrogen, either due to lack of absorption or a negligible permeation rate due to their thickness. To determine if hydrogen was indeed adsorbed, thermogravimetric and differential thermal analyses tests were performed on samples of ZnS powder. A significant uptake of hydrogen gas occurred, corresponding to a maximum of 1 mole H{sub 2} per 1 mole ZnS at a temperature of 175 C. The hydrogen remained in the material at ambient temperature in a hydrogen atmosphere, but approximately 50% would be removed in argon. Reheating in a hydrogen atmosphere resulted in no additional hydrogen uptake. Differential scanning calorimetry indicated that the hydrogen uptake was probably due to the formation of a zinc-sulfur-hydrogen species resulting in the formation of hydrogen sulfide. The zinc sulfide was found to be unstable above approximately 200 C, probably with the reduction to metallic zinc with the evolution of hydrogen sulfide. The work has shown that ZnS is not a viable candidate for a high-temperature hydrogen separation membrane.

Donald P. McCollor; John P. Kay

1999-08-01T23:59:59.000Z

115

Hydrogen-permeable composite metal membrane and uses thereof  

DOE Patents (OSTI)

Various hydrogen production and hydrogen sulfide decomposition processes are disclosed that utilize composite metal membranes that contain an intermetallic diffusion barrier separating a hydrogen-permeable base metal and a hydrogen-permeable coating metal. The barrier is a thermally stable inorganic proton conductor.

Edlund, David J. (Bend, OR); Friesen, Dwayne T. (Bend, OR)

1993-06-08T23:59:59.000Z

116

Wet oxidation of oil-bearing sulfide wastes  

SciTech Connect

Oil-bearing metal sulfide sludges produced in treatment of an industrial wastewater, which includes plating wastes, have yielded to treatment by electrooxidation and hydrogen peroxide processes. The oxidation can be controlled to be mild enough to avoid decomposition of the organic phase while oxidizing the sulfides to sulfates. The pH is controlled to near neutral conditions where iron, aluminum and chromium(III) precipitate as hydrous oxides. Other metals, such as lead and barium, may be present as sulfate precipitates with limited solubility, while metals such as nickel and cadmium would be present as complexed ions in a sulfate solution. The oxidations were found to proceed smoothly, without vigorous reaction; heat liberation was minimal. 2 refs., 12 figs.

Miller, R.L.; Hotz, N.J.

1991-01-01T23:59:59.000Z

117

NETL: Gasification  

NLE Websites -- All DOE Office Websites (Extended Search)

Technology Options CO2 Capture Technology Options All gasification-based conversion processes require removal of hydrogen sulfide (H2S; an acid gas) from the synthesis gas (syngas)...

118

Transition metal sulfide loaded catalyst  

DOE Patents (OSTI)

A zeolite based catalyst for activation and conversion of methane. A zeolite support includes a transition metal (Mo, Cr or W) sulfide disposed within the micropores of the zeolite. The catalyst allows activation and conversion of methane to C.sub.2 + hydrocarbons in a reducing atmosphere, thereby avoiding formation of oxides of carbon.

Maroni, Victor A. (Naperville, IL); Iton, Lennox E. (Downers Grove, IL); Pasterczyk, James W. (Westmont, IL); Winterer, Markus (Westmont, IL); Krause, Theodore R. (Lisle, IL)

1994-01-01T23:59:59.000Z

119

Transition metal sulfide loaded catalyst  

DOE Patents (OSTI)

A zeolite-based catalyst is described for activation and conversion of methane. A zeolite support includes a transition metal (Mo, Cr or W) sulfide disposed within the micropores of the zeolite. The catalyst allows activation and conversion of methane to C[sub 2]+ hydrocarbons in a reducing atmosphere, thereby avoiding formation of oxides of carbon.

Maroni, V.A.; Iton, L.E.; Pasterczyk, J.W.; Winterer, M.; Krause, T.R.

1994-04-26T23:59:59.000Z

120

Biological sweetening of energy gases mimics in biotrickling filters Marc Fortuny a,c  

E-Print Network (OSTI)

: Hydrogen sulfide; Gas sweetening; Biotrickling filter; Desulfurization; Fuel gas; Biogas 1. Introduction in energy-rich gases such as biogas from anaerobic digesters which may contain H2S concentrations exceeding ones specifically developed for the removal of high concentra- tions of H2S from biogas or fuel gas

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

Hydrogen Piping Experience in Chevron Refining  

NLE Websites -- All DOE Office Websites (Extended Search)

Piping Piping Experience in Chevron Refining Ned Niccolls Materials Engineer Chevron Energy Technology Company Hydrogen Pipeline Working Group Workshop August 30-31, 2005 Outline 2 Overall perspectives from long term use of hydrogen piping in refining. Piping specifications and practices. The (few) problem areas. Related industry work: American Petroleum Institute corrosion and materials work on high temperature hydrogen attack. Overall Perspectives 3 Few problems with hydrogen piping operating at ambient to at least 800F and pressures up to at least 3000psia as long as we stay within well- defined limits H2S contamination presents many more problems, beyond the scope of this talk We will note a couple of specific vulnerabilities Refining tracks materials performance in

122

Sulfide Stress Cracking in Steels - A Review  

Science Conference Proceedings (OSTI)

Symposium, Corrosion and Corrosion Protection of Materials in the Oil and Gas Industry. Presentation Title, Sulfide Stress Cracking in Steels - A Review.

123

Extracellular Proteins Promote Zinc Sulfide Aggregation  

NLE Websites -- All DOE Office Websites (Extended Search)

Sulfide Aggregation Print Researchers from the ALS, Berkeley Lab's National Center for Electron Microscopy (NCEM), and Lawrence Livermore National Laboratory analyzed biofilm...

124

Electrolytic production of hydrogen. [from carbonaceous materials  

SciTech Connect

A cyclic electrolytic process is claimed for the manufacture of hydrogen from carbonaceous material such as coal, agricultural wastes and garbage to produce commercial hydrogen. An alakli metal sulfate is reduced to an alkali metal sulfide by reaction of the sulfate and carbonaceous fuel at an elevated temperature. The sulfide and impurities derived from the fuel are digested with an aqueous solution to dissolve the sulfide and separate out the impurities. The solution of the alkali sulfide is added to electrolytic cells in which an electric current is utilized to generate hydrogen at the cathode while oxidizing the sulfide substantially to sulfate at the anode. The cell electrolyte temperature is greater than 150/sup 0/C and less than 350/sup 0/C. Under these conditions the polarization problem encountered in hydrogen/oxygen cells is substantially avoided. The alkali sulfate is then separated from the electrolyte stream exiting from the electrolytic cells, reduced again by burning with fuel and recycled to the electrolytic cell.

Spitzer, R.

1978-03-28T23:59:59.000Z

125

Sulfidation of mixed metal oxides in a fluidized-bed reactor  

SciTech Connect

Mixed metal oxides were used for the removal of hydrogen sulfide from a hot gas stream. Sorbents were prepared according to the dry and wet impregnation techniques. The desulfurization performance of the metal oxide sorbents was experimentally tested in a fluidized-bed reactor system. Sulfidation experiments performed under reaction conditions similar to those at the exit of a coal gasifier showed that the preparation procedure and technique, the type and the amount of the impregnated metal oxide, the type of the solid carrier, and the size of the solid reactant affect the H[sub 2]S removal capacity of the sorbents. The pore structure of fresh and sulfided sorbents was analyzed using mercury porosimetry, nitrogen adsorption, and scanning electron microscopy.

Christoforou, S.C.; Efthimiadis, E.A.; Vasalos, I.A. (Aristotelian Univ. of Thessaloniki (Greece))

1995-01-01T23:59:59.000Z

126

Sulfidation  

Science Conference Proceedings (OSTI)

...Coal gasification is an important process, providing material challenges. Reference 81 describes the evaluation of alloys

127

Turning Sun and Water Into Hydrogen Fuel | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Turning Sun and Water Into Hydrogen Fuel Turning Sun and Water Into Hydrogen Fuel Turning Sun and Water Into Hydrogen Fuel May 5, 2011 - 1:27pm Addthis Tiny silicon pillars, used to absorb light. When dotted with a catalyst of molybdenum sulfide and exposed to sunlight, these pillars generate hydrogen gas from the hydrogen ions liberated by splitting water. Each pillar is approximately two micrometers in diameter. | Photo courtesy of Christian D. Damsgaard, Thomas Pedersen and Ole Hansen, Technical University of Denmark Tiny silicon pillars, used to absorb light. When dotted with a catalyst of molybdenum sulfide and exposed to sunlight, these pillars generate hydrogen gas from the hydrogen ions liberated by splitting water. Each pillar is approximately two micrometers in diameter. | Photo courtesy of Christian D.

128

Turning Sun and Water Into Hydrogen Fuel | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Turning Sun and Water Into Hydrogen Fuel Turning Sun and Water Into Hydrogen Fuel Turning Sun and Water Into Hydrogen Fuel May 5, 2011 - 1:27pm Addthis Tiny silicon pillars, used to absorb light. When dotted with a catalyst of molybdenum sulfide and exposed to sunlight, these pillars generate hydrogen gas from the hydrogen ions liberated by splitting water. Each pillar is approximately two micrometers in diameter. | Photo courtesy of Christian D. Damsgaard, Thomas Pedersen and Ole Hansen, Technical University of Denmark Tiny silicon pillars, used to absorb light. When dotted with a catalyst of molybdenum sulfide and exposed to sunlight, these pillars generate hydrogen gas from the hydrogen ions liberated by splitting water. Each pillar is approximately two micrometers in diameter. | Photo courtesy of Christian D.

129

Geothermal hydrogen sulfide and health in Rotorua, New Zealand  

DOE Green Energy (OSTI)

Rotorua, New Zealand, lies inside a volcanic caldera. Natural steam is extensively used for space and water heating, and electric power generation. This report presents results of a preliminary reconnaissance survey of atmospheric H/sub 2/S levels in the area and attempts to relate these levels to health statistics in the region. 5 refs., 8 tabs. (ACR)

Siegel, S.M.; Siegel, B.Z.

1984-02-15T23:59:59.000Z

130

Hydrogen Sulfide, Oil and Gas, and People's Lana Skrtic  

E-Print Network (OSTI)

at sewage treatment plants, manure-handling plants, tanneries, and coke oven plants.5 2 EPA, "Report standard cubic feet)."9 Sour gas is routinely `sweetened' at processing facilities called desulfurization Process for Desulfurizing Ultra-deep Natural Gas Near the Wellhead," presented at Natural Gas Technologies

Kammen, Daniel M.

131

Geothermal: Sponsored by OSTI -- Control of hydrogen sulfide...  

Office of Scientific and Technical Information (OSTI)

III. Final report: demonstration plant equipment descriptions, test plan, and operating instructions Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us |...

132

Acid treatment removes zinc sulfide scale restriction  

Science Conference Proceedings (OSTI)

This paper reports that removal of zinc sulfide (ZnS) scale with acid restored an offshore Louisiana well's production to original rates. The zinc sulfide scale was determined to be in the near well bore area. The selected acid had been proven to control iron sulfide (FeS) scales in sour wells without causing harm to surface production equipment, tubing, and other downhole hardware. The successful removal of the blockage re-established previous production rates with a 105% increase in flowing tubing pressure. On production for a number of months, a high rate, high-pressure offshore well was experiencing unusually rapid pressure and rate declines. A small sample of the restrictive material was obtained during the wire line operations. The well was subsequently shut in while a laboratory analysis determined that zinc sulfide was the major component of the obstruction.

Biggs, K. (Kerr McGee Corp., Lafayette, LA (US)); Allison, D. (Otis Engineering Corp., Lafayette, LA (US)); Ford, W.G.F. (Halliburton Co., Duncan, OK (United States))

1992-08-31T23:59:59.000Z

133

Extracellular Proteins Promote Zinc Sulfide Aggregation  

NLE Websites -- All DOE Office Websites (Extended Search)

Extracellular Proteins Promote Zinc Sulfide Aggregation Print Extracellular Proteins Promote Zinc Sulfide Aggregation Print Researchers from the ALS, Berkeley Lab's National Center for Electron Microscopy (NCEM), and Lawrence Livermore National Laboratory analyzed biofilm samples rich in zinc sulfide and dominated by sulfate-reducing bacteria, which were collected from lead-zinc mine waters. The researchers were curious about the relationship of the organic material and metals, particularly how organics affect mobility, and its potential for bioremediation. It is known that some organics promote aggregation. Amine-bearing molecules, for example, can organize sulfide nanoparticles into semiconductor nanowires. The research team used a series of imaging techniques and detectors to analyze aggregates of biogenic zinc sulfide nanocrystals in the biofilms. Their examination yielded excellent results and some surprises. They were able to prove that natural organic matter promotes dense aggregation of the zinc sulfide nanocrystals into much larger spheroids and that the organic matter is preserved in nanometer-scale pores in the spheroids. What was not expected was the presence of proteins in the spheroids, making them a key component in aggregation and an example of extracellular biomineralization.

134

Extracellular Proteins Promote Zinc Sulfide Aggregation  

NLE Websites -- All DOE Office Websites (Extended Search)

Extracellular Proteins Promote Extracellular Proteins Promote Zinc Sulfide Aggregation Extracellular Proteins Promote Zinc Sulfide Aggregation Print Wednesday, 26 September 2007 00:00 Researchers from the ALS, Berkeley Lab's National Center for Electron Microscopy (NCEM), and Lawrence Livermore National Laboratory analyzed biofilm samples rich in zinc sulfide and dominated by sulfate-reducing bacteria, which were collected from lead-zinc mine waters. The researchers were curious about the relationship of the organic material and metals, particularly how organics affect mobility, and its potential for bioremediation. It is known that some organics promote aggregation. Amine-bearing molecules, for example, can organize sulfide nanoparticles into semiconductor nanowires. The research team used a series of imaging techniques and detectors to analyze aggregates of biogenic zinc sulfide nanocrystals in the biofilms. Their examination yielded excellent results and some surprises. They were able to prove that natural organic matter promotes dense aggregation of the zinc sulfide nanocrystals into much larger spheroids and that the organic matter is preserved in nanometer-scale pores in the spheroids. What was not expected was the presence of proteins in the spheroids, making them a key component in aggregation and an example of extracellular biomineralization.

135

Extracellular Proteins Promote Zinc Sulfide Aggregation  

NLE Websites -- All DOE Office Websites (Extended Search)

Extracellular Proteins Promote Zinc Sulfide Aggregation Print Extracellular Proteins Promote Zinc Sulfide Aggregation Print Researchers from the ALS, Berkeley Lab's National Center for Electron Microscopy (NCEM), and Lawrence Livermore National Laboratory analyzed biofilm samples rich in zinc sulfide and dominated by sulfate-reducing bacteria, which were collected from lead-zinc mine waters. The researchers were curious about the relationship of the organic material and metals, particularly how organics affect mobility, and its potential for bioremediation. It is known that some organics promote aggregation. Amine-bearing molecules, for example, can organize sulfide nanoparticles into semiconductor nanowires. The research team used a series of imaging techniques and detectors to analyze aggregates of biogenic zinc sulfide nanocrystals in the biofilms. Their examination yielded excellent results and some surprises. They were able to prove that natural organic matter promotes dense aggregation of the zinc sulfide nanocrystals into much larger spheroids and that the organic matter is preserved in nanometer-scale pores in the spheroids. What was not expected was the presence of proteins in the spheroids, making them a key component in aggregation and an example of extracellular biomineralization.

136

First commercial test is success for catalytic hydrogen sulfide oxidation process. [LO-CAT catalytic hydrogen sulfide oxidation processes  

SciTech Connect

A description is given of the characteristics of the process and the bases for selecting the LO-CAT process for sulfur recovery from refinery process off-gas streams. In addition, the details of the application and the experience gained during the startup at the Tacoma, Washington refinery are described. The LO-CAT uses a nontoxic catalyst solution and a relatively simple processing scheme which employs sulfur sinking for the separation of sulfur from the circulating sulfur slurry. In addition, the LO-CAT process promised very high sulfur recovery efficiency, 99.85% minimum, and essentially an infinite turndown ratio. A discussion is presented of the major problems experienced in the operation of the LO-CAT sulfur recovery unit which have been: sulfur floating, catalyst solution foaming, corrosion, erosion, plugging, and biological growth. Each of these problems has surfaced repeatedly in the operation of the plant. Operating guidelines are provided. 2 refs.

Cabodi, A.J.; Van, H.R.; Hardison, L.C.

1982-07-05T23:59:59.000Z

137

Thermal decomposition of mercuric sulfide  

Science Conference Proceedings (OSTI)

The rate of thermal decomposition of mercuric sulfide (HgS) has been measured at temperatures from 265 to 345 C. These data have been analyzed using a first-order chemical reaction model for the time dependence of the reaction and the Arrhenius equation for the temperature dependence of the rate constant. Using this information, the activation energy for the reaction was found to be 55 kcal/mol. Significant reaction vessel surface effects obscured the functional form of the time dependence of the initial portion of the reaction. The data and the resulting time-temperature reaction-rate model were used to predict the decomposition rate of HgS as a function of time and temperature in thermal treatment systems. Data from large-scale thermal treatment studies already completed were interpreted in terms of the results of this study. While the data from the large-scale thermal treatment studies were consistent with the data from this report, mass transport effects may have contributed to the residual amount of mercury which remained in the soil after most of the large-scale runs.

Leckey, J.H.; Nulf, L.E.

1994-10-28T23:59:59.000Z

138

Hydrogen Sensor  

NLE Websites -- All DOE Office Websites (Extended Search)

sensor for detectingquantitating hydrogen and hydrogen isotopes includes a sampling line and a microplasma generator that excites hydrogen from a gas sample and produces...

139

Why Sequence Sulfur-Oxidizing Bacteria?  

NLE Websites -- All DOE Office Websites (Extended Search)

Sulfur-Oxidizing Bacteria? Sulfur-Oxidizing Bacteria? Several environmental problems, such as acid rain, biocorrosion, etc., are caused by sulfur compounds, such as sulfur dioxide (SO2) and hydrogen sulfide (H2S). A sustainable process to remove these sulfur compounds is the production of elemental sulfur from H2S-containing gas streams by the use of sulfide-oxidizing bacteria. In this process, H2S is absorbed into the alkaline solution in the scrubber unit, followed by the biological oxidation of H2S to elemental sulfur and the recycling of water. With this two-step process, a variety of gas streams (i.e., natural gas, synthesis gas, biogas, and refinery gas) can be treated. For the treatment of sulfate-containing waste streams, an extra step has to be introduced: the transformation of sulfate into H2S by sulfate-reducing bacteria. In

140

Hydrogen Publications  

Science Conference Proceedings (OSTI)

Thermophysical Properties of Hydrogen. ... These articles, of interest to the hydrogen community, can be viewed by clicking on the title. ...

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

Properties Hydrogen  

Science Conference Proceedings (OSTI)

Thermophysical Properties of Hydrogen. PROPERTIES, ... For information on a PC database that includes hydrogen property information click here. ...

142

Hydrogen & Fuel Cells - Hydrogen - Hydrogen Storage  

NLE Websites -- All DOE Office Websites (Extended Search)

University of Chicago team. On-board hydrogen storage is critical to the development of future high energy efficiency transportation technologies, such as hydrogen-powered fuel...

143

Hydrogen Delivery  

NLE Websites -- All DOE Office Websites (Extended Search)

Mark Paster Energy Efficiency and Renewable Energy Hydrogen, Fuel Cells and Infrastructure Technology Program Hydrogen Production and Delivery Team Hydrogen Delivery Goal Hydrogen Delivery Goal Liquid H 2 & Chem. Carriers Gaseous Pipeline Truck Hydrides Liquid H 2 - Truck - Rail Other Carriers Onsite reforming Develop Develop hydrogen fuel hydrogen fuel delivery delivery technologies that technologies that enable the introduction and enable the introduction and long long - - term viability of term viability of hydrogen as an energy hydrogen as an energy carrier for transportation carrier for transportation and stationary power. and stationary power. Delivery Options * End Game - Pipelines - Other as needed * Breakthrough Hydrogen Carriers * Truck: HP Gas & Liquid Hydrogen

144

Hydrogen Highways  

E-Print Network (OSTI)

Joan Ogden, “The Hope for Hydrogen,” Issues in Science andand James S. Cannon. The Hydrogen Energy Transition: MovingHydrogen Highways BY TIMOTHY LIPMAN H 2 T H E S TAT E O F C

Lipman, Timothy

2005-01-01T23:59:59.000Z

145

Cadmium zinc sulfide by solution growth  

SciTech Connect

A process for depositing thin layers of a II-VI compound cadmium zinc sulfide (CdZnS) by an aqueous solution growth technique with quality suitable for high efficiency photovoltaic or other devices which can benefit from the band edge shift resulting from the inclusion of Zn in the sulfide. A first solution comprising CdCl.sub.2 2.5H.sub.2 O, NH.sub.4 Cl, NH.sub.4 OH and ZnCl.sub.2, and a second solution comprising thiourea ((NH.sub.2).sub.2 CS) are combined and placed in a deposition cell, along with a substrate to form a thin i.e. 10 nm film of CdZnS on the substrate. This process can be sequentially repeated with to achieve deposition of independent multiple layers having different Zn concentrations.

Chen, Wen S. (Seattle, WA)

1992-05-12T23:59:59.000Z

146

Iron-sulfide redox flow batteries  

Science Conference Proceedings (OSTI)

Iron-sulfide redox flow battery (RFB) systems can be advantageous for energy storage, particularly when the electrolytes have pH values greater than 6. Such systems can exhibit excellent energy conversion efficiency and stability and can utilize low-cost materials that are relatively safer and more environmentally friendly. One example of an iron-sulfide RFB is characterized by a positive electrolyte that comprises Fe(III) and/or Fe(II) in a positive electrolyte supporting solution, a negative electrolyte that comprises S.sup.2- and/or S in a negative electrolyte supporting solution, and a membrane, or a separator, that separates the positive electrolyte and electrode from the negative electrolyte and electrode.

Xia, Guan-Guang; Yang, Zhenguo; Li, Liyu; Kim, Soowhan; Liu, Jun; Graff, Gordon L

2013-12-17T23:59:59.000Z

147

Subsurface heaters with low sulfidation rates  

SciTech Connect

A system for heating a hydrocarbon containing formation includes a heater having an elongated ferromagnetic metal heater section. The heater is located in an opening in a formation. The heater section is configured to heat the hydrocarbon containing formation. The exposed ferromagnetic metal has a sulfidation rate that goes down with increasing temperature of the heater, when the heater is in a selected temperature range.

John, Randy Carl; Vinegar, Harold J

2013-12-10T23:59:59.000Z

148

Single-layer transition metal sulfide catalysts  

SciTech Connect

Transition Metal Sulfides (TMS), such as molybdenum disulfide (MoS.sub.2), are the petroleum industry's "workhorse" catalysts for upgrading heavy petroleum feedstocks and removing sulfur, nitrogen and other pollutants from fuels. We have developed an improved synthesis technique to produce SLTMS catalysts, such as molybdenum disulfide, with potentially greater activity and specificity than those currently available. Applications for this technology include heavy feed upgrading, in-situ catalysis, bio-fuel conversion and coal liquefaction.

Thoma, Steven G. (Albuquerque, NM)

2011-05-31T23:59:59.000Z

149

Single-layer transition metal sulfide catalysts  

DOE Patents (OSTI)

Transition Metal Sulfides (TMS), such as molybdenum disulfide (MoS.sub.2), are the petroleum industry's "workhorse" catalysts for upgrading heavy petroleum feedstocks and removing sulfur, nitrogen and other pollutants from fuels. We have developed an improved synthesis technique to produce SLTMS catalysts, such as molybdenum disulfide, with potentially greater activity and specificity than those currently available. Applications for this technology include heavy feed upgrading, in-situ catalysis, bio-fuel conversion and coal liquefaction.

Thoma, Steven G. (Albuquerque, NM)

2011-05-31T23:59:59.000Z

150

Hydrogen Production  

Office of Scientific and Technical Information (OSTI)

Hydrogen Production Hydrogen Research in DOE Databases Energy Citations Database Information Bridge Science.gov WorldWideScience.org Increase your H2IQ More information Making...

151

Hydrogen sensor  

DOE Patents (OSTI)

A hydrogen sensor for detecting/quantitating hydrogen and hydrogen isotopes includes a sampling line and a microplasma generator that excites hydrogen from a gas sample and produces light emission from excited hydrogen. A power supply provides power to the microplasma generator, and a spectrometer generates an emission spectrum from the light emission. A programmable computer is adapted for determining whether or not the gas sample includes hydrogen, and for quantitating the amount of hydrogen and/or hydrogen isotopes are present in the gas sample.

Duan, Yixiang (Los Alamos, NM); Jia, Quanxi (Los Alamos, NM); Cao, Wenqing (Katy, TX)

2010-11-23T23:59:59.000Z

152

Hydrogen Storage Technologies Hydrogen Delivery  

E-Print Network (OSTI)

Hydrogen Storage Technologies Roadmap Hydrogen Delivery Technical Team Roadmap June 2013 #12;This.................................................................................. 13 6. Hydrogen Storage and Innovation for Vehicle efficiency and Energy sustainability) is a voluntary, nonbinding, and nonlegal

153

Tungsten oxide ( WO 3 ) thin films for application in advanced energy systems  

Science Conference Proceedings (OSTI)

Inherent processes in coal gasification plants produce hazardous hydrogen sulfide ( H 2 S ) which must be continuously and efficiently detected and removed before the fuel is used for power generation. An attempt has been made in this work to fabricate tungsten oxide ( WO 3 ) thin films by radio-frequency reactive magnetron-sputter deposition. The impetus being the use of WO 3 films for H 2 S sensors in coal gasification plants. The effect of growth temperature

S. K. Gullapalli; R. S. Vemuri; F. S. Manciu; J. L. Enriquez; C. V. Ramana

2010-01-01T23:59:59.000Z

154

Synthesis of actinide nitrides, phosphides, sulfides and oxides  

DOE Patents (OSTI)

This invention is comprised of a process of preparing an actinide compound of the formula An{sub x}Z{sub y} wherein An is an actinide metal atom selected from the group consisting of thorium, uranium, plutonium, neptunium, and americium, x is selected from the group consisting of one, two or three, Z is a main group element atom selected from the group consisting of nitrogen, phosphorus, oxygen and sulfur and y is selected from the group consisting of one, two, three or four, by admixing an actinide organometallic precursor wherein said actinide is selected from the group consisting of thorium, uranium, plutonium, neptunium, and americium, a suitable solvent and a protic Lewis base selected from the group consisting of ammonia, phosphine, hydrogen sulfide and water, at temperatures and for time sufficient to form an intermediate actinide complex, heating said intermediate actinide complex at temperatures and for time sufficient to form the actinide compound, and a process of depositing a thin film of such an actinide compound, e.g., uranium mononitride, by subliming an actinide organometallic precursor, e.g., a uranium amide precursor, in the presence of an effective amount of a protic Lewis base, e.g., ammonia, within a reactor at temperatures and for time sufficient to form a thin film of the actinide compound, are disclosed.

Van Der Sluys, W.G.; Burns, C.J.; Smith, D.C.

1991-04-02T23:59:59.000Z

155

Synthesis of actinide nitrides, phosphides, sulfides and oxides  

DOE Green Energy (OSTI)

A process of preparing an actinide compound of the formula An.sub.x Z.sub.y wherein An is an actinide metal atom selected from the group consisting of thorium, uranium, plutonium, neptunium, and americium, x is selected from the group consisting of one, two or three, Z is a main group element atom selected from the group consisting of nitrogen, phosphorus, oxygen and sulfur and y is selected from the group consisting of one, two, three or four, by admixing an actinide organometallic precursor wherein said actinide is selected from the group consisting of thorium, uranium, plutonium, neptunium, and americium, a suitable solvent and a protic Lewis base selected from the group consisting of ammonia, phosphine, hydrogen sulfide and water, at temperatures and for time sufficient to form an intermediate actinide complex, heating said intermediate actinide complex at temperatures and for time sufficient to form the actinide compound, and a process of depositing a thin film of such an actinide compound, e.g., uranium mononitride, by subliming an actinide organometallic precursor, e.g., a uranium amide precursor, in the presence of an effectgive amount of a protic Lewis base, e.g., ammonia, within a reactor at temperatures and for time sufficient to form a thin film of the actinide compound, are disclosed.

Van Der Sluys, William G. (Missoula, MT); Burns, Carol J. (Los Alamos, NM); Smith, David C. (Los Alamos, NM)

1992-01-01T23:59:59.000Z

156

Hydrogen & Fuel Cells - Hydrogen - Hydrogen Quality  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Quality Issues for Fuel Cell Vehicles Hydrogen Quality Issues for Fuel Cell Vehicles Introduction Developing and implementing fuel quality specifications for hydrogen are prerequisites to the widespread deployment of hydrogen-fueled fuel cell vehicles. Several organizations are addressing this fuel quality issue, including the International Standards Organization (ISO), the Society of Automotive Engineers (SAE), the California Fuel Cell Partnership (CaFCP), and the New Energy and Industrial Technology Development Organization (NEDO)/Japan Automobile Research Institute (JARI). All of their activities, however, have focused on the deleterious effects of specific contaminants on the automotive fuel cell or on-board hydrogen storage systems. While it is possible for the energy industry to provide extremely pure hydrogen, such hydrogen could entail excessive costs. The objective of our task is to develop a process whereby the hydrogen quality requirements may be determined based on life-cycle costs of the complete hydrogen fuel cell vehicle "system." To accomplish this objective, the influence of different contaminants and their concentrations in fuel hydrogen on the life-cycle costs of hydrogen production, purification, use in fuel cells, and hydrogen analysis and quality verification are being assessed.

157

Bioleaching and electrobioleaching of low grade copper sulfide ore ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Low grade Copper sulfide ore of Sarcheshmeh copper mine of Iran was leached using bioleaching mode and electrobioleaching mode.

158

On the Mechanism of Castastropic Atmospheric Sulfidation of ...  

Science Conference Proceedings (OSTI)

Presentation Title, On the Mechanism of Castastropic Atmospheric Sulfidation of Electronic Components in Data Centers. Author(s), Linn W. Hobbs. On-Site ...

159

MATHEMATICAL MODELING OF THE LITHIUM-ALUMINUM, IRON SULFIDE BATTERY  

E-Print Network (OSTI)

and J. Newman, Proc. Syrup. Battery Design and Optimization,123, 1364 (1976). Symp, Battery Design and Optimization, S.~ALUMINUM, IRON SULFIDE BATTERY Contents ACKNOWLEDGEMENTS

Pollard, Richard

2012-01-01T23:59:59.000Z

160

Code for Hydrogen Hydrogen Pipeline  

E-Print Network (OSTI)

#12;2 Code for Hydrogen Pipelines Hydrogen Pipeline Working Group Workshop Augusta, Georgia August development · Charge from BPTCS to B31 Standards Committee for Hydrogen Piping/Pipeline code development · B31.12 Status & Structure · Hydrogen Pipeline issues · Research Needs · Where Do We Go From Here? #12;4 Code

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

Reduced ternary molybdenum and tungsten sulfides and hydroprocessing catalysis therewith  

DOE Patents (OSTI)

New amorphous molybdenum/tungsten sulfides with the general formula M.sup.n+.sub.2x/n (L.sub.6 S.sub.8)S.sub.x, where L is molybdenum or tungsten and M is a ternary metal, has been developed. Characterization of these amorphous materials by chemical and spectroscopic methods (IR, Raman, PES) shows that the (M.sub.6 S.sub.8).sup.0 cluster units are present. Vacuum thermolysis of the amorphous Na.sub.2x (Mo.sub.6 S.sub.8)S.sub.x .multidot.yMeOH first produces poorly crystalline NaMo.sub.6 S.sub.8 by disproportionation at 800.degree. C. and well-crystallized NaMo.sub.6 S.sub.8 at .gtoreq. 900.degree. C. Ion-exchange of the sodium material in methanol with soluble M.sup.2+ and M.sup.3+ salts (M=Sn, Co, Ni, Pb, La, Ho) produces the M.sup.n+.sub.2x/n (Mo.sub.6 S.sub.8)S.sub.x .multidot.yMeOH compounds. Additionally, the new reduced ternary molybdenum sulfides with the general formula M.sup.n+.sub.2x/n Mo.sub.6 S.sub.8+x (MeOH).sub.y ›MMOS! (M=Sn, Co, Ni) is an effective hydrodesulfurization (HDS) catalyst both as-prepared and after a variety of pretreatment conditions. Under specified pretreatment conditions with flowing hydrogen gas, the SnMoS type catalyst can be stabilized, and while still amorphous, can be considered as "Chevrel phase-like" in that both contain Mo.sub.6 S.sub.8 cluster units. Furthermore, the small cation NiMoS and CoMoS type pretreated catalyst showed to be very active HDS catalysts with rates that exceeded the model unpromoted and cobalt-promoted MoS.sub.2 catalysts.

Hilsenbeck, Shane J. (Ames, IA); McCarley, Robert E. (Ames, IA); Schrader, Glenn L. (Ames, IA); Xie, Xiaobing (College Station, TX)

1999-02-16T23:59:59.000Z

162

Hydrogen & Fuel Cells - Hydrogen - Hydrogen Production  

NLE Websites -- All DOE Office Websites (Extended Search)

Center Working With Argonne Contact TTRDC Thermochemical Cycles for Hydrogen Production Argonne researchers are studying thermochemical cycles to determine their potential...

163

Hydrogen Fuel  

Energy.gov (U.S. Department of Energy (DOE))

Hydrogen is a clean fuel that, when consumed, produces only water. Hydrogen can be produced from a variety of domestic sources, such as coal, natural gas, nuclear power, and renewable power. These...

164

Hydrogen Storage  

Fuel Cell Technologies Publication and Product Library (EERE)

This 2-page fact sheet provides a brief introduction to hydrogen storage technologies. Intended for a non-technical audience, it explains the different ways in which hydrogen can be stored, as well a

165

Hydrogen – Radialysis  

INL scientists have invented a process of forming chemical compositions, such as a hydrides which can provide a source of hydrogen. The process exposes the chemical composition decaying radio-nuclides which provide the energy to with a hydrogen source ...

166

Hydrogen Safety  

Fuel Cell Technologies Publication and Product Library (EERE)

This 2-page fact sheet, intended for a non-technical audience, explains the basic properties of hydrogen and provides an overview of issues related to the safe use of hydrogen as an energy carrier.

167

Hydrogen wishes  

Science Conference Proceedings (OSTI)

Hydrogen Wishes, presented at MIT's Center for Advanced Visual Studies, explores the themes of wishes and peace. It dramatizes the intimacy and power of transforming one's breath and vocalized wishes into a floating sphere, a bubble charged with hydrogen. ...

Winslow Burleson; Paul Nemirovsky; Dan Overholt

2003-07-01T23:59:59.000Z

168

Hydrogen Production  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Production DELIVERY FUEL CELLS STORAGE PRODUCTION TECHNOLOGY VALIDATION CODES & STANDARDS SYSTEMS INTEGRATION ANALYSES SAFETY EDUCATION RESEARCH & DEVELOPMENT Economy...

169

Hydrogen Storage  

Science Conference Proceedings (OSTI)

Oct 10, 2012 ... Energy Storage: Materials, Systems and Applications: Hydrogen Storage Program Organizers: Zhenguo "Gary" Yang, Pacific Northwest ...

170

Hydrogen Storage  

Science Conference Proceedings (OSTI)

Applied Neutron Scattering in Engineering and Materials Science Research: Hydrogen Storage Sponsored by: Metallurgical Society of the Canadian Institute of ...

171

A Techno-Economic Assessment of Hydrogen Production by  

E-Print Network (OSTI)

be cleaned at gasifier temperature ­ Reformer Requirements > H2S less than 100 ppmv ­ PEM Fuel Cell

172

Hydrogenation apparatus  

DOE Patents (OSTI)

Hydrogenation reaction apparatus is described comprising a housing having walls which define a reaction zone and conduits for introducing streams of hydrogen and oxygen into the reaction zone, the oxygen being introduced into a central portion of the hydrogen stream to maintain a boundary layer of hydrogen along the walls of the reaction zone. A portion of the hydrogen and all of the oxygen react to produce a heated gas stream having a temperature within the range of from 1,100 to 1,900 C, while the boundary layer of hydrogen maintains the wall temperature at a substantially lower temperature. The heated gas stream is introduced into a hydrogenation reaction zone and provides the source of heat and hydrogen for a hydrogenation reaction. There also is provided means for quenching the products of the hydrogenation reaction. The present invention is particularly suitable for the hydrogenation of low-value solid carbonaceous materials to provide high yields of more valuable liquid and gaseous products. 2 figs.

Friedman, J.; Oberg, C.L.; Russell, L.H.

1981-06-23T23:59:59.000Z

173

Use of sulfide-containing liquors for removing mercury from flue gases  

DOE Patents (OSTI)

A method and apparatus for reducing and removing mercury in industrial gases, such as a flue gas, produced by the combustion of fossil fuels, such as coal, adds sulfide ions to the flue gas as it passes through a scrubber. Ideally, the source of these sulfide ions may include at least one of: sulfidic waste water, kraft caustic liquor, kraft carbonate liquor, potassium sulfide, sodium sulfide, and thioacetamide. The sulfide ion source is introduced into the scrubbing liquor as an aqueous sulfide species. The scrubber may be either a wet or dry scrubber for flue gas desulfurization systems.

Nolan, Paul S. (North Canton, OH); Downs, William (Alliance, OH); Bailey, Ralph T. (Uniontown, OH); Vecci, Stanley J. (Alliance, OH)

2003-01-01T23:59:59.000Z

174

Transition Metal Sulfide Electrocatalysts for PEM Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Transition Metal Sulfide Transition Metal Sulfide Electrocatalysts for PEM Fuel Cells Hua Zhang 1 , Ysmael Verde-Gómez 1 and Allan J. Jacobson 1 Alejandra Ramirez 2 and Russell R. Chianelli 2 1 Department of Chemistry, University of Houston Houston, TX 77204 2 Materials Research and Technology Institute, University of Texas at El Paso, El Paso, TX 79968 Transition Metal Sulfide Electrocatalysts for PEM Fuel Cells Hua Zhang 1 , Ysmael Verde-Gómez 1 and Allan J. Jacobson 1 Alejandra Ramirez 2 and Russell R. Chianelli 2 1 Department of Chemistry, University of Houston Houston, TX 77204 2 Materials Research and Technology Institute, University of Texas at El Paso, El Paso, TX 79968 March 21, 2003 Objectives ¾ Investigate non-platinum electro-catalysts with CO tolerance ¾ Focus on transition metal sulfides as electro-catalysts

175

Design and fabrication of a tin-sulfide annealing furnace  

E-Print Network (OSTI)

A furnace was designed and its heat transfer properties were analyzed for use in annealing thin-film tins-ulfide solar cells. Tin sulfide has been explored as an earth abundant solar cell material, and the furnace was ...

Lewis, Raymond, S.M. (Raymond A.) Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

176

Multiple-sulfur isotope effects during photolysis of carbonyl sulfide  

E-Print Network (OSTI)

Laboratory experiments were carried out to determine sulfur isotope effects during ultraviolet photolysis of carbonyl sulfide (OCS) to carbon monoxide (CO) and elemental sulfur (S[superscript 0]). The OCS gas at 3.7 to 501 ...

Lin, Ying

177

Looping Sulfide Oxidation Process for Anode Copper Production  

Science Conference Proceedings (OSTI)

Chemical Enrichment of Precious Metals in Iron Sulfides Using Microwave Energy · Chloridizing ... Co-Gasification Behavior of Metallurgical Coke with High and Low Reactivity .... Thermal Plasma Torches for Metallurgical Applications.

178

Investigation of Microbial Respirometry for Monitoring Natural Sulfide Abatement in Geothermal Cooling Tower Basins  

DOE Green Energy (OSTI)

Geothermal plant operators are interested in investigating the ability of micro-organisms found in the cooling tower basin to metabolize and cycle sulfide to less toxic sulfur compounds. If the growth or activity of the organisms participating in sulfur-oxidation could be selectively enhanced, then hydrogen sulfide could be naturally abated in the cooling basin, substantially reducing the costs associated with the chemicals used for abatement. The use of respirometry has been proposed as a technique for monitoring the response of the microbial populations found in geothermal cooling towers to various conditions, including the addition of nutrients such as nitrogen and phosphorus. Respiro-metry is a manometric measurement of dissolved gases that are in equilibrium in a con-fined sample volume. Since microbes expire varying amounts of carbon dioxide or oxygen as they metabolize nutrients, this technique can be used to evaluate their activities in process streams. This report describes a series of experiments designed to determine the suitability of respirometry for tracking microbial activity for evaluating and enhancing natural abatement processes in geothermal cooling basins.

Peter A. Pryfogle

2005-09-01T23:59:59.000Z

179

Process for thin film deposition of cadmium sulfide  

DOE Patents (OSTI)

The present invention teaches a process for depositing layers of cadmium sulfide. The process includes depositing a layer of cadmium oxide by spray pyrolysis of a cadmium salt in an aqueous or organic solvent. The oxide film is then converted into cadmium sulfide by thermal ion exchange of the O.sup.-2 for S.sup.-2 by annealing the oxide layer in gaseous sulfur at elevated temperatures.

Muruska, H. Paul (East Windsor, NJ); Sansregret, Joseph L. (Scotch Plains, NJ); Young, Archie R. (Montclair, NJ)

1982-01-01T23:59:59.000Z

180

SewerSnort: A drifting sensor for in situ Wastewater Collection System gas monitoring  

Science Conference Proceedings (OSTI)

Biochemical reactions that occur in sewer pipes produce a considerable amount of hydrogen sulfide gas (H"2S corrosive and poisonous), methane gas (CH"4 explosive and a major climate change contributor), carbon dioxide (CO"2 a major climate change contributor), ... Keywords: Biochemical process, Electrochemical gas sensor, Mobile sensing, Received signal strength indicator based localization, Wastewater Collection System

Jung Soo Lim, Jihyoung Kim, Jonathan Friedman, Uichin Lee, Luiz Vieira, Diego Rosso, Mario Gerla, Mani B. Srivastava

2013-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "h2s hydrogen sulfide" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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181

Hydrogen Safety  

Science Conference Proceedings (OSTI)

... ASHRAE 62.1, 7 air changes per hour, 100 ... I, Division II, Group B: testing and research laboratory; ... Planning Guidance for Hydrogen Projects as a ...

2012-10-09T23:59:59.000Z

182

Energy Basics: Hydrogen Fuel  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydrogen Fuel Fuel Cells Hydropower Ocean Solar Wind Hydrogen Fuel Hydrogen...

183

Hydrogen | Open Energy Information  

Open Energy Info (EERE)

Hydrogen Jump to: navigation, search TODO: Add description Related Links List of Companies in Hydrogen Sector List of Hydrogen Incentives Hydrogen Energy Data Book Retrieved from...

184

Weld-overlay iron-aluminide coatings for use in high-temperature oxidizing/sulfidizing environments  

DOE Green Energy (OSTI)

The development of iron-aluminide weld overlay coatings for high-temperature oxidation and sulfidation resistance critically depends on the determination of the aluminum concentration range for which good corrosion behavior and weldability coexist. This study demonstrated that a sound weld overlay composition with about 30 at.% Al has relatively low corrosion rates in a highly aggressive oxidizing/sulfidizing (H{sub 2}S-H{sub 2}-H{sub 2}O-Ar) environment at 800 C. Its corrosion resistance was superior to alloys with compositions like that of type 310 stainless steel and Fecralloy. The results with this overlay composition can be explained on the basis of what is known about the effects of variations in aluminum and chromium concentrations on high-temperature oxidation/sulfidation from studies with bulk iron aluminides. While higher aluminum concentrations are even better for long-term corrosion resistance, the ability to reliably produce weld overlays of such compositions without hydrogen cracking is problematical and is the subject of continuing development.

Tortorelli, P.F.; Goodwin, G.M.; Howell, M.; DeVan, J.H. [Oak Ridge National Lab., TN (United States). Metals and Ceramics Div.

1995-09-01T23:59:59.000Z

185

Hydrogen production  

SciTech Connect

The production of hydrogen by reacting an ash containing material with water and at least one halogen selected from the group consisting of chlorine, bromine and iodine to form reaction products including carbon dioxide and a corresponding hydrogen halide is claimed. The hydrogen halide is decomposed to separately release the hydrogen and the halogen. The halogen is recovered for reaction with additional carbonaceous materials and water, and the hydrogen is recovered as a salable product. In a preferred embodiment the carbonaceous material, water and halogen are reacted at an elevated temperature. In accordance with another embodiment, a continuous method for the production of hydrogen is provided wherein the carbonaceous material, water and at least one selected halogen are reacted in one zone, and the hydrogen halide produced from the reaction is decomposed in a second zone, preferably by electrolytic decomposition, to release the hydrogen for recovery and the halogen for recycle to the first zone. There also is provided a method for recovering any halogen which reacts with or is retained in the ash constituents of the carbonaceous material.

Darnell, A.J.; Parkins, W.E.

1978-08-08T23:59:59.000Z

186

Hydrogen Bibliography  

DOE Green Energy (OSTI)

The Hydrogen Bibliography is a compilation of research reports that are the result of research funded over the last fifteen years. In addition, other documents have been added. All cited reports are contained in the National Renewable Energy Laboratory (NREL) Hydrogen Program Library.

Not Available

1991-12-01T23:59:59.000Z

187

Atmospheric measurements of carbonyl sulfide, dimethyl sulfide, and carbon disulfide using the electron capture sulfur detector  

SciTech Connect

Measurements of atmospheric dimethyl sulfide (DMS), carbonyl sulfide (COS), and carbon disulfide (CS2) were conducted over the Atlantic Ocean on board the NASA Electra aircraft during the Chemical Instrumentation Test and Evaluation (CITE 3) project using the electron capture sulfur detector (ECD-S). The system employed cryogenic preconcentration of air samples, gas chromatographic separation, catalytic fluorination, and electron capture detection. Samples collected for DMS analysis were scrubbed of oxidants with NaOH impregnated glass fiber filters to preconcentration. The detection limits (DL) of the system for COS, DMS, and CS2 were 5, 5, and 2 ppt, respectively. COS concentrations ranged from 404 to 603 ppt with a mean of 489 ppt for measurements over the North Atlantic Ocean (31 deg N to 41 deg N), and from 395 to 437 ppt with a mean of 419 ppt for measurements over the Tropical Atlantic Ocean (11 deg S to 2 deg N). DMS concentrations in the lower marine boundary layer, below 600-m altitude, ranged from below DL to 150 ppt from flights over the North Atlantic, and from 9 to 104 ppt over the Tropical Atlantic. CS2 concentrations ranged from below DL to 29 ppt over the North Atlantic. Almost all CS2 measurements over the Tropical Atlantic were below DL.

Johnson, J.E.; Bates, T.S. [NOAA, Seattle, WA (United States)

1993-12-01T23:59:59.000Z

188

Biomass-Derived Hydrogen from a Thermally Ballasted Gasifier  

DOE Green Energy (OSTI)

The goal of this project is to develop an indirectly heated gasification system that converts switchgrass into hydrogen-rich gas suitable for powering fuel cells. The project includes investigations of the indirectly-heated gasifier, development of particulate removal equipment, evaluation of catalytic methods for upgrading producer gas, development of contaminant measurement and control techniques, modeling of the thermal performance of the ballasted gasifier, and estimation of the cost of hydrogen from the proposed gasification system. Specific technologies investigated include a thermally ballasted gasifier, a moving bed granular filter, and catalytic reactors for steam reforming and water-gas shift reaction. The approach to this project was to employ a pilot-scale (5 ton per day) gasifier to evaluate the thermally ballasted gasifier as a means for producing hydrogen from switchgrass. A slipstream from the gasifier was used to evaluate gas cleaning and upgrading options. Other tests were conducted with laboratory-scale equipment using simulated producer gas. The ballasted gasifier operated in conjunction with a steam reformer and two-stage water-gas shift reactor produced gas streams containing 54.5 vol-% H2. If purge gas to the feeder system could be substantially eliminated, hydrogen concentration would reach 61 vol-%, which closely approaches the theoretical maximum of 66 vol-%. Tests with a combined catalyst/sorbent system demonstrated that steam reforming and water-gas shift reaction could be substantially performed in a single reactor and achieve hydrogen concentrations exceeding 90 vol-%. Cold flow trials with a laboratory-scale moving bed granular filter achieved particle removal efficiencies exceeding 99%. Two metal-based sorbents were tested for their ability to remove H2S from biomass-derived producer gas. The ZnO sorbent, tested at 450? C, was effective in reducing H2S from 200 ppm to less than 2 ppm (>99% reduction) while tests with the MnO sorbent were inconclusive. A computer model was developed that successfully predicted the thermal performance of the ballasted gasifier. An economic comparison of an air-blown gasification plant and a ballasted gasifier plant found that operating costs for ballasted gasification plant are about 31% higher than for the air blown gasifier plant. Hydrogen from the ballasted gasification plant and air blown gasification plant are projected to be $2.43/kg and $1.85/kg, respectively. This is lower than U.S. DOE’s 2010 target price of $2.90/kg and comparable to U.S. DOE’s 2015 target price of $2.00/kg.

Robert C. Brown

2007-04-06T23:59:59.000Z

189

Hydrogen: Helpful Links & Contacts  

Science Conference Proceedings (OSTI)

Helpful Links & Contacts. Helpful Links. Hydrogen Information, Website. ... Contacts for Commercial Hydrogen Measurement. ...

2013-07-31T23:59:59.000Z

190

Hydrogen & Fuel Cells - Hydrogen - Hydrogen Storage  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Storage Systems Modeling and Analysis Hydrogen Storage Systems Modeling and Analysis Several different approaches are being pursued to develop on-board hydrogen storage systems for light-duty vehicle applications. The different approaches have different characteristics, such as: the thermal energy and temperature of charge and discharge kinetics of the physical and chemical process steps involved requirements for the materials and energy interfaces between the storage system and the fuel supply system on one hand, and the fuel user on the other Other storage system design and operating parameters influence the projected system costs as well. Argonne researchers are developing thermodynamic, kinetic, and engineering models of the various hydrogen storage systems to understand the characteristics of storage systems based on these approaches and to evaluate their potential to meet the DOE targets for on-board applications. The DOE targets for 2015 include a system gravimetric capacity of 1.8 kWh/kg (5.5 wt%) and a system volumetric capacity of 1.3 kWh/L (40 g/L). We then use these models to identify significant component and performance issues, and evaluate alternative system configurations and design and operating parameters.

191

Hydrogen ICE  

NLE Websites -- All DOE Office Websites (Extended Search)

Chevrolet Silverado 1500HD Hydrogen ICE 1 Conversion Vehicle Specifications Engine: 6.0 L V8 Fuel Capacity: 10.5 GGE Nominal Tank Pressure: 5,000 psi Seatbelt Positions: Five...

192

Hydrogen Production  

Fuel Cell Technologies Publication and Product Library (EERE)

This 2-page fact sheet provides a brief introduction to hydrogen production technologies. Intended for a non-technical audience, it explains how different resources and processes can be used to produ

193

Method of treating intermetallic alloy hydrogenation/oxidation catalysts for improved impurity poisoning resistance, regeneration and increased activity  

DOE Patents (OSTI)

The present invention is directed to a method of treating intermetallic alloy hydrogenation/oxidation catalysts with successive oxidation catalysts with successive oxidation and hydrogenation steps at increased temperature to make the intermetallic alloy hydrogenation or oxidation catalysts less susceptible to deactivation by gas impurities, such as hydrogen sulfide; to increase the ability of the hydrogenation and oxidation catalysts to regenerate after sulfur poisoning; and to increase the activity of the hydrogenation and oxidation catalysts to a point close to their original activities after gas impurity poisoning and regeneration. The treatment processes of the present invention are particularly useful for nickel-containing intermetallic alloy hydrogenation catalysts and platinum-containing intermetallic alloy hydrogenation catalysts and best results are obtained for the zirconium/nickel intermetallic alloy hydrogenation catalysts. 23 figs.

Wright, R.B.

1990-02-12T23:59:59.000Z

194

Froth flotation of oil-bearing metal sulfide wastes  

SciTech Connect

An industrial wastewater, including plating wastes, is treated with sodium sulfide and ferrous sulfate to form a sulfide-oxide precipitate containing chromium and other toxic metals. Hydrocarbons, in the water, coat the sulfide-oxide particles, impeding metal recovery. Froth flotation, without reagent addition, was found to recover 93.9% of the solids from the sludge with simultaneous rejection of 89% of the water. Methyl isobutyl carbinol (MIBC) improved recovery and potassium amyl xanthate improved both recovery and grade. The process design has wastewater feed (without MIBC) to the rougher circuit. The rougher concentrate is conditioned with MIBC and fed to a cleaner circuit to achieve a high grade concentrate. About 95% of the water is recirculated to the waste treatment plant. 3 refs., 3 figs., 4 tabs.

Miller, R.L. [Idaho National Engineering Lab., Idaho Falls, ID (United States); Atwood, R.L.; Ye, Yi [Advanced Processing Technologies, Inc., Salt Lake City, UT (United States)

1991-12-01T23:59:59.000Z

195

Froth flotation of oil-bearing metal sulfide wastes  

SciTech Connect

An industrial wastewater, including plating wastes, is treated with sodium sulfide and ferrous sulfate to form a sulfide-oxide precipitate containing chromium and other toxic metals. Hydrocarbons, in the water, coat the sulfide-oxide particles, impeding metal recovery. Froth flotation, without reagent addition, was found to recover 93.9% of the solids from the sludge with simultaneous rejection of 89% of the water. Methyl isobutyl carbinol (MIBC) improved recovery and potassium amyl xanthate improved both recovery and grade. The process design has wastewater feed (without MIBC) to the rougher circuit. The rougher concentrate is conditioned with MIBC and fed to a cleaner circuit to achieve a high grade concentrate. About 95% of the water is recirculated to the waste treatment plant. 3 refs., 3 figs., 4 tabs.

Miller, R.L. (Idaho National Engineering Lab., Idaho Falls, ID (United States)); Atwood, R.L.; Ye, Yi (Advanced Processing Technologies, Inc., Salt Lake City, UT (United States))

1991-01-01T23:59:59.000Z

196

Measurements for Hydrogen Storage Materials  

Science Conference Proceedings (OSTI)

Measurements for Hydrogen Storage Materials. Summary: ... Hydrogen is promoted as petroleum replacement in the Hydrogen Economy. ...

2013-07-02T23:59:59.000Z

197

Low cost hydrogen/novel membrane technology for hydrogen separation from synthesis gas  

DOE Green Energy (OSTI)

The production of hydrogen from synthesis gas made by gasification of coal is expensive. The separation of hydrogen from synthesis gas is a major cost element in the total process. In this report we describe the results of a program aimed at the development of membranes and membrane modules for the separation and purification of hydrogen from synthesis gas. The performance properties of the developed membranes were used in an economic evaluation of membrane gas separation systems in the coal gasification process. Membranes tested were polyetherimide and a polyamide copolymer. The work began with an examination of the chemical separations required to produce hydrogen from synthesis gas, identification of three specific separations where membranes might be applicable. A range of membrane fabrication techniques and module configurations were investigated to optimize the separation properties of the membrane materials. Parametric data obtained were used to develop the economic comparison of processes incorporating membranes with a base-case system without membranes. The computer calculations for the economic analysis were designed and executed. Finally, we briefly investigated alternative methods of performing the three separations in the production of hydrogen from synthesis gas. The three potential opportunities for membranes in the production of hydrogen from synthesis gas are: (1) separation of hydrogen from nitrogen as the final separation in a air-blown or oxygen-enriched air-blown gasification process, (2) separation of hydrogen from carbon dioxide and hydrogen sulfide to reduce or eliminate the conventional ethanolamine acid gas removal unit, and (3) separation of hydrogen and/or carbon dioxide form carbon monoxide prior to the shift reactor to influence the shift reaction. 28 refs., 54 figs., 40 tabs.

Baker, R.W.; Bell, C.M.; Chow, P.; Louie, J.; Mohr, J.M.; Peinemann, K.V.; Pinnau, I.; Wijmans, J.G.; Gottschlich, D.E.; Roberts, D.L.

1990-10-01T23:59:59.000Z

198

Separating hydrogen from coal gasification gases with alumina membranes  

DOE Green Energy (OSTI)

Synthesis gas produced in coal gasification processes contains hydrogen, along with carbon monoxide, carbon dioxide, hydrogen sulfide, water, nitrogen, and other gases, depending on the particular gasification process. Development of membrane technology to separate the hydrogen from the raw gas at the high operating temperatures and pressures near exit gas conditions would improve the efficiency of the process. Tubular porous alumina membranes with mean pore radii ranging from about 9 to 22 {Angstrom} have been fabricated and characterized. Based on hydrostatic tests, the burst strength of the membranes ranged from 800 to 1600 psig, with a mean value of about 1300 psig. These membranes were evaluated for separating hydrogen and other gases. Tests of membrane permeabilities were made with helium, nitrogen, and carbon dioxide. Measurements were made at room temperature in the pressure range of 15 to 589 psi. Selected membranes were tested further with mixed gases simulating a coal gasification product gas. 5 refs., 7 figs.

Egan, B.Z. (Oak Ridge National Lab., TN (USA)); Fain, D.E.; Roettger, G.E.; White, D.E. (Oak Ridge K-25 Site, TN (USA))

1991-01-01T23:59:59.000Z

199

Storing Hydrogen  

DOE Green Energy (OSTI)

Researchers have been studying mesoporous materials for almost two decades with a view to using them as hosts for small molecules and scaffolds for molding organic compounds into new hybrid materials and nanoparticles. Their use as potential storage systems for large quantities of hydrogen has also been mooted. Such systems that might hold large quantities of hydrogen safely and in a very compact volume would have enormous potential for powering fuel cell vehicles, for instance. A sponge-like form of silicon dioxide, the stuff of sand particles and computer chips, can soak up and store other compounds including hydrogen. Studies carried out at the XOR/BESSRC 11-ID-B beamline at the APS have revealed that the nanoscopic properties of the hydrogenrich compound ammonia borane help it store hydrogen more efficiently than usual. The material may have potential for addressing the storage issues associated with a future hydrogen economy. Pacific Northwest National Laboratory is operated by Battelle for the US Department of Energy.

Kim, Hyun Jeong; Karkamkar, Abhijeet J.; Autrey, Thomas; Chupas, Peter; Proffen, Thomas E.

2010-05-31T23:59:59.000Z

200

Hydrogen Analysis  

NLE Websites -- All DOE Office Websites (Extended Search)

A A H2A: Hydrogen Analysis Margaret K. Mann DOE Hydrogen, Fuel Cells, and Infrastructure Technologies Program Systems Analysis Workshop July 28-29, 2004 Washington, D.C. H2A Charter * H2A mission: Improve the transparency and consistency of approach to analysis, improve the understanding of the differences among analyses, and seek better validation from industry. * H2A was supported by the HFCIT Program H2A History * First H2A meeting February 2003 * Primary goal: bring consistency & transparency to hydrogen analysis * Current effort is not designed to pick winners - R&D portfolio analysis - Tool for providing R&D direction * Current stage: production & delivery analysis - consistent cost methodology & critical cost analyses * Possible subsequent stages: transition analysis, end-point

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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
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201

Hydrogen Technologies Group  

DOE Green Energy (OSTI)

The Hydrogen Technologies Group at the National Renewable Energy Laboratory advances the Hydrogen Technologies and Systems Center's mission by researching a variety of hydrogen technologies.

Not Available

2008-03-01T23:59:59.000Z

202

FCT Hydrogen Production: Contacts  

NLE Websites -- All DOE Office Websites (Extended Search)

Contacts to someone by E-mail Share FCT Hydrogen Production: Contacts on Facebook Tweet about FCT Hydrogen Production: Contacts on Twitter Bookmark FCT Hydrogen Production:...

203

The Transition to Hydrogen  

E-Print Network (OSTI)

Prospects for Building a Hydrogen Energy Infrastructure,”and James S. Cannon. The Hydrogen Energy Transition: Movingof Energy, National Hydrogen Energy Roadmap, November 2002.

Ogden, Joan

2005-01-01T23:59:59.000Z

204

Hydrogen SRNL Connection  

hydrogen storage. Why is Savannah River National Laboratory conducting hydrogen research and development? ... Both the Department of Energy’s hydrogen ...

205

FCT Hydrogen Storage: Contacts  

NLE Websites -- All DOE Office Websites (Extended Search)

Contacts to someone by E-mail Share FCT Hydrogen Storage: Contacts on Facebook Tweet about FCT Hydrogen Storage: Contacts on Twitter Bookmark FCT Hydrogen Storage: Contacts on...

206

National Hydrogen Energy Roadmap  

NLE Websites -- All DOE Office Websites (Extended Search)

HYDROGEN ENERGY ROADMAP NATIONAL HYDROGEN ENERGY ROADMAP . . Toward a More Secure and Cleaner Energy Future for America Based on the results of the National Hydrogen Energy Roadmap...

207

National Hydrogen Energy Roadmap  

NLE Websites -- All DOE Office Websites (Extended Search)

NATIONAL HYDROGEN ENERGY ROADMAP NATIONAL HYDROGEN ENERGY ROADMAP . . Toward a More Secure and Cleaner Energy Future for America Based on the results of the National Hydrogen...

208

Hydrogen Transition Infrastructure Analysis  

DOE Green Energy (OSTI)

Presentation for the 2005 U.S. Department of Energy Hydrogen Program review analyzes the hydrogen infrastructure needed to accommodate a transitional hydrogen fuel cell vehicle demand.

Melendez, M.; Milbrandt, A.

2005-05-01T23:59:59.000Z

209

Reaction Behavior of Sulfides Associated with Stibnite in Low ...  

Science Conference Proceedings (OSTI)

In this research, we aim at the behavior of sulfides involved PbS, Cu2S, Bi2S3 and FeS2 in Na2CO3-NaCl molten salt, using XRD and TG-DTA methods based

210

Microstructure and Corrosion Behavior of the Cu-Pd-X Ternary Alloys for Hydrogen Separation Membranes  

DOE Green Energy (OSTI)

CuPd alloys are among the most promising candidate materials for hydrogen separation membranes and membrane reactor applications due to their high hydrogen permeability and better sulfur resistance. In order to reduce the Pd content and, therefore, the cost of the membrane materials, efforts have been initiated to develop CuPdM ternary alloys having a bcc structure. The advantages of having Pd as a hydrogen separation membrane are: (1) high hydrogen selectivity; and (2) high hydrogen permeability. The disadvantages are: (1) high cost; (2) hydrogen embrittlement ({alpha} {yields} {beta} Pd hydride); and (3) sulfur poisoning. Experiments (XRD, SEM/EDS) verified that Mg, Al, La, Y and Ti are promising alloying elements to expand the B2 phase region in Cu-Pd binary system. HT-XRD showed that the B2 to FCC transition temperatures for Cu-Pd-X (X = Mg, Al, La, Y and Ti) are higher than that of Cu-Pd binary alloys. While the Cu-50Pd alloy had the highest corrosion resistance to the H2S containing syngas, the Cu-Pd-Mg alloy had a comparable resistance.

O.N. Dogan; M.C. Gao; B.H. Howard

2012-02-26T23:59:59.000Z

211

Hydrogen Storage  

NLE Websites -- All DOE Office Websites (Extended Search)

Objectives - Develop and verify: On-board hydrogen storage systems achieving: 1.5 kWhkg (4.5 wt%), 1.2 kWhL, and 6kWh by 2005 2 kWhkg (6 wt%), 1.5 kWhL, and 4kWh by...

212

DOE Hydrogen Analysis Repository: Distributed Hydrogen Production...  

NLE Websites -- All DOE Office Websites (Extended Search)

government interests, a variety of vendors, and numerous utilities. Keywords: Hydrogen production, natural gas, costs Purpose Assess progress toward the 2005 DOE Hydrogen...

213

DOE Hydrogen Analysis Repository: Hydrogen Futures Simulation...  

NLE Websites -- All DOE Office Websites (Extended Search)

hydrogen scenarios will affect carbon and other environmental effluents and U.S. oil import requirements Outputs: Delivered hydrogen costs (cost per gallon of gas...

214

DOE Hydrogen Analysis Repository: Hydrogen Refueling Infrastructure...  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Refueling Infrastructure Cost Analysis Project Summary Full Title: Hydrogen Refueling Infrastructure Cost Analysis Project ID: 273 Principal Investigator: Marc Melaina...

215

DOE Hydrogen Analysis Repository: Hydrogen Infrastructure Market...  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Infrastructure Market Readiness Analysis Project Summary Full Title: Hydrogen Infrastructure Market Readiness Analysis Project ID: 268 Principal Investigator: Marc Melaina...

216

DOE Hydrogen Analysis Repository: Electrolytic Hydrogen Production  

NLE Websites -- All DOE Office Websites (Extended Search)

by Principal Investigator Projects by Date U.S. Department of Energy Electrolytic Hydrogen Production Project Summary Full Title: Summary of Electrolytic Hydrogen Production:...

217

Hydrogen Analysis Group  

DOE Green Energy (OSTI)

NREL factsheet that describes the general activites of the Hydrogen Analysis Group within NREL's Hydrogen Technologies and Systems Center.

Not Available

2008-03-01T23:59:59.000Z

218

Hydrogen Technology Validation  

Fuel Cell Technologies Publication and Product Library (EERE)

This fact sheet provides a basic introduction to the DOE Hydrogen National Hydrogen Learning Demonstration for non-technical audiences.

219

Surface Segregation in a PdCu Alloy Hydrogen Separation Membrane  

DOE Green Energy (OSTI)

Separation of hydrogen from mixed gas streams is an important step for hydrogen generation technologies, including hydrocarbon reforming and coal/biomass gasification. Dense palladium-based membranes have received significant attention for this application because of palladium’s ability to dissociatively adsorb molecular hydrogen at its surface for subsequent transport of hydrogen atoms through its bulk. Alloying palladium with minor components, like copper, has been shown to improve both the membrane’s structural characteristics and resistance to poisoning of its catalytic surface [1]. Surface segregation—a composition difference between the bulk material and its surface—is common in alloys and can affect important surface processes. Rational design of alloy membranes requires that surface segregation be understood, and possibly controlled. In this work, we examine surface segregation in a polycrystalline Pd70Cu30 hydrogen separation membrane as a function of thermal treatment and adsorption of hydrogen sulfide.

Miller, J.B.; Matranga, C.S.; Gellman, A.J.

2007-06-01T23:59:59.000Z

220

Nuclear Hydrogen Initiative  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Nuclear Research Advanced Nuclear Research Office of Nuclear Energy, Science and Technology FY 2003 Programmatic Overview Nuclear Hydrogen Initiative Nuclear Hydrogen Initiative Office of Nuclear Energy, Science and Technology Henderson/2003 Hydrogen Initiative.ppt 2 Nuclear Hydrogen Initiative Nuclear Hydrogen Initiative Program Goal * Demonstrate the economic commercial-scale production of hydrogen using nuclear energy by 2015 Need for Nuclear Hydrogen * Hydrogen offers significant promise for reduced environmental impact of energy use, specifically in the transportation sector * The use of domestic energy sources to produce hydrogen reduces U.S. dependence on foreign oil and enhances national security * Existing hydrogen production methods are either inefficient or produce

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

Hydrogen Sensor Testing, Hydrogen Technologies (Fact Sheet)  

DOE Green Energy (OSTI)

Factsheet describing the hydrogen sensor testing laboratory at the National Renewable Energy Laboratory.

Not Available

2008-11-01T23:59:59.000Z

222

Hydrogen as a fuel  

SciTech Connect

A panel of the Committee on Advanced Energy Storage Systems of the Assembly of Engineering has examined the status and problems of hydrogen manufacturing methods, hydrogen transmission and distribution networks, and hydrogen storage systems. This examination, culminating at a time when rapidly changing conditions are having noticeable impact on fuel and energy availability and prices, was undertaken with a view to determining suitable criteria for establishing the pace, timing, and technical content of appropriate federally sponsored hydrogen R and D programs. The increasing urgency to develop new sources and forms of fuel and energy may well impact on the scale and timing of potential future hydrogen uses. The findings of the panel are presented. Chapters are devoted to hydrogen sources, hydrogen as a feedstock, hydrogen transport and storage, hydrogen as a heating fuel, automotive uses of hydrogen, aircraft use of hydrogen, the fuel cell in hydrogen energy systems, hydrogen research and development evaluation, and international hydrogen programs.

1979-01-01T23:59:59.000Z

223

PERGAMON Carbon 38 (2000) 17571765 High temperature hydrogen sulfide adsorption on activated  

E-Print Network (OSTI)

directly, as in a traditional H , 23.1% CO, 5.8% CO , 6.6% H O, 0.5% H S, and2 2 2 2 coal-fired power plant was activated using coal-fired power plants. With improved gas turbine tech- steam by replacing the N flow temperature was examined as a2 function of carbon surface chemistry (oxidation, thermal desorption, and metal

Cal, Mark P.

224

Cost of meeting geothermal hydrogen sulfide emission regulations. [DOW, EIC, Stretford, and iron catalyst processes  

DOE Green Energy (OSTI)

H{sub 2}S emission abatement processes considered feasible for control of airborne emissions included two upstream and two downstream treatment techniques. From literature describing the technical aspects of the processes, individual treatment cost functions were developed. These functions were then used to estimate the range of costs that may be encountered when controlling H{sub 2}S emissions to meet given standards. Treatment costs include estimates of certain fixed charges and overheads that normally apply to long lived capital investment projects of similar nature. Continuing experience with control technology for H{sub 2}S abatement indicates process application may have a significant impact on the total cost of geothermal electricity at sites with H{sub 2}S concentrations in excess of 50 ppM{sub w}. Approximately four sites of the 38 USGS high temperature hydrothermal systems fall into this category. At Baca, New Mexico the cost of controlling H{sub 2}S emissions was estimated to be 5.5 mills per kWh. Calculations were based on a 50 MWe flashed steam plant using the Stretford-Peroxide combination of processes to achieve 99% abatement.

Wells, K.D.; Currie, J.W.; Weakley, S.A.; Ballinger, M.Y.

1980-01-01T23:59:59.000Z

225

Modeling Hydrogen Sulfide Adsorption by Activated Carbon made from Anaerobic Digestion By-product.  

E-Print Network (OSTI)

??Biogas, produced from anaerobic digestion of cattle manure, is an attractive alternative energy source as it is rich in methane. However, it is necessary to… (more)

Ho, Natalie

2012-01-01T23:59:59.000Z

226

Reaction of Hydrogen Sulfide with Oxygen in the Presence of Sulfite  

E-Print Network (OSTI)

absorption becn is with havc correlated the LIV (ChenOH - end mtwulfidcs havc bcen -duliguc (1972), andt9? t) and ludi$ (1979) havc applicdrhis informationto

Weres, Oleh; Tsao, Leon

1983-01-01T23:59:59.000Z

227

Reaction of Hydrogen Sulfide with Oxygen in the Presence of Sulfite  

E-Print Network (OSTI)

citnlc lmsM cobdt citntq rrc rulfitq pH 7.t. Squrro: l0mM ofWackenrodcr's Scction 4.4),but rrc doubtthis wassignificant.

Weres, Oleh; Tsao, Leon

1983-01-01T23:59:59.000Z

228

PERGAMON Carbon 38 (2000) 17671774 High temperature hydrogen sulfide adsorption on activated  

E-Print Network (OSTI)

.e. an activation energy is required for chemi- cal adsorption to occur and once that energy is supplied and gas-phase regeneration experiments were [1] Cal MP, Strickler BW, Lizzio AA. High temperature hydro, PA: US Department of Energy/Federal removal requirement set at one of the DOE's IGCC plants. Energy

Cal, Mark P.

229

Sulfide ceramics in molten-salt electrolyte batteries  

DOE Green Energy (OSTI)

Sulfide ceramics are finding application in the manufacture of advanced batteries with molten salt electrolyte. Use of these ceramics as a peripheral seal component has permitted development of bipolar Li/FeS{sub 2} batteries. This bipolar battery has a molten lithium halide electrolyte and operates at 400 to 450C. Initial development and physical properties evaluations indicate the ability to form metal/ceramic bonded seal (13-cm ID) components for use in high-temperature corrosive environments. These sealants are generally CaAl{sub 2}S{sub 4}-based ceramics. Structural ceramics (composites with oxide or nitride fillers), highly wetting sealant formulations, and protective coatings are also being developed. Sulfide ceramics show great promise because of their relatively low melting point, high-temperature viscous flow, chemical stability, high-strength bonding, and tailored coefficients of thermal expansion. Our methodology of generating laminated metal/ceramic pellets (e.g., molybdenum/sulfide ceramic/molybdenum) with which to optimize materials formulation and seal processing is described.

Kaun, T.D.; Hash, M.C.; Simon, D.R.

1995-06-01T23:59:59.000Z

230

DOE Hydrogen and Fuel Cells Program: Hydrogen Storage  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy Search help Home > Hydrogen Storage Printable Version Hydrogen Storage Hydrogen storage is a key enabling technology for the advancement of hydrogen and fuel cell power...

231

FCT Hydrogen Storage: The 'National Hydrogen Storage Project...  

NLE Websites -- All DOE Office Websites (Extended Search)

The 'National Hydrogen Storage Project' to someone by E-mail Share FCT Hydrogen Storage: The 'National Hydrogen Storage Project' on Facebook Tweet about FCT Hydrogen Storage: The...

232

Hydrogen from Coal  

NLE Websites -- All DOE Office Websites (Extended Search)

Coal Coal Edward Schmetz Office of Sequestration, Hydrogen and Clean Coal Fuels U.S. Department of Energy DOE Workshop on Hydrogen Separations and Purification Technologies September 8, 2004 Presentation Outline ƒ Hydrogen Initiatives ƒ Hydrogen from Coal Central Production Goal ƒ Why Coal ƒ Why Hydrogen Separation Membranes ƒ Coal-based Synthesis Gas Characteristics ƒ Technical Barriers ƒ Targets ƒ Future Plans 2 3 Hydrogen from Coal Program Hydrogen from Coal Program FutureGen FutureGen Hydrogen Fuel Initiative Hydrogen Fuel Initiative Gasification Fuel Cells Turbines Gasification Fuel Cells Turbines Carbon Capture & Sequestration Carbon Capture & Sequestration The Hydrogen from Coal Program Supports the Hydrogen Fuel Initiative and FutureGen * The Hydrogen Fuel Initiative is a $1.2 billion RD&D program to develop hydrogen

233

Synthesis and Characterization of CO- and H2S-Tolerant Electrocatalysts for PEM Fuel Cell  

DOE Green Energy (OSTI)

The present state-of-art Proton Exchange Membrane Fuel Cell (PEMFC) technology is based on platinum (Pt) as a catalyst for both the fuel (anode) and air (cathode) electrodes. This catalyst is highly active but susceptible to poisoning by CO, which may be present in the H{sub 2}-fuel used or may be introduced during the fuel processing. Presence of trace amount of CO and H{sub 2}S in the H{sub 2}-fuel poisons the anode irreversibly and decreases the performance of the PEMFCs. In an effort to reduce the Pt-loading and improve the PEMFC performance, we propose to synthesize a number of Pt-based binary, ternary, and quaternary electrocatalysts using Ru, Mo, Ir, Ni, and Co as a substitute for Pt. By fine-tuning the metal loadings and compositions of candidate electrocatalysts, we plan to minimize the cost and optimize the catalyst activity and performance in PEMFC. The feasibility of the novel electrocatalysts will be demonstrated in the proposed effort with gas phase CO and H{sub 2}S concentrations typical of those found in reformed fuel gas with coal/natural gas/methanol feedstocks. In this work binary, ternary, and quaternary platinum-based electrocatalysts were synthesized for the purpose of lowering the cost and increasing the CO tolerance of the membrane electrode assembly (MEA) in the fuel cell. The metals Ru, Mo, W, Ir, Co and Se were alloyed with platinum on a carbon support using a modified reduction method. These catalysts were fabricated into MEAs and evaluated for electrical performance and CO tolerance with polarization experiments. The quaternary system Pt/Ru/Mo/Ir system is the most CO tolerant in the PEMFC and has a low total metal loading of 0.4 mg/cm{sup 2} in the electrode of the cell.

Shamsuddin Ilias

2006-09-30T23:59:59.000Z

234

Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems  

Science Conference Proceedings (OSTI)

In this study, reactive transport simulations were used to assess the mobilization and transport of organics with supercritical CO{sub 2} (SCC), and the co-injection and transport of H{sub 2}S with SCC. These processes were evaluated at conditions of typical storage reservoirs, and for cases of hypothetical leakage from a reservoir to an overlying shallower fresh water aquifer. Modeling capabilities were developed to allow the simulation of multiphase flow and transport of H{sub 2}O, CO{sub 2}, H{sub 2}S, as well as specific organic compounds (benzene), coupled with multicomponent geochemical reaction and transport. This included the development of a new simulator, TMVOC-REACT, starting from existing modules of the TOUGH2 family of codes. This work also included an extensive literature review, calculation, and testing of phase-partitioning properties for mixtures of the phases considered. The reactive transport simulations presented in this report are primarily intended to illustrate the capabilities of the new simulator. They are also intended to help evaluate and understand various processes at play, in a more qualitative than quantitative manner, and only for hypothetical scenarios. Therefore, model results are not intended as realistic assessments of groundwater quality changes for specific locations, and they certainly do not provide an exhaustive evaluation of all possible site conditions, especially given the large variability and uncertainty in hydrogeologic and geochemical parameter input into simulations. The first step in evaluating the potential mobilization and transport of organics was the identification of compounds likely to be present in deep storage formations, and likely to negatively impact freshwater aquifers if mobilized by SCC. On the basis of a literature review related to the occurrence of these organic compounds, their solubility in water and SCC, and their toxicity (as reflected by their maximum contaminant levels MCL), benzene was selected as a key compound for inclusion into numerical simulations. Note that considering additional organic compounds and/or mixtures of such compounds in the simulations was beyond the scope of this study, because of the effort required to research, calculate, and validate the phase-partitioning data necessary for simulations. The injection of CO{sub 2} into a deep saline aquifer was simulated, followed by modeling the leaching of benzene by SCC and transport of benzene to an overlying aquifer along a hypothetical leakage pathway. One- and two-dimensional models were set up for this purpose. The target storage formation was assumed to initially contain about 10{sup -4} ppm benzene. Model results indicate that: (1) SCC efficiently extracts benzene from the storage formation. (2) Assuming equilibrium, the content of benzene in SCC is roportional to the concentration of benzene in the aqueous and solid phases. (3) Benzene may co-migrate with CO{sub 2} into overlying aquifers if a leakage pathway is present. Because the aqueous solubility of benzene in contact with CO{sub 2} is lower than the aqueous solubility of CO{sub 2}, benzene is actually enriched in the CO{sub 2} phase as the plume advances. (4) For the case studied here, the resulting aqueous benzene concentration in the overlying aquifer is on the same order of magnitude as the initial concentration in the storage formation. This generic modeling study illustrates, in a semi-quantitative manner, the possible mobilization of benzene by SCC. The extent to which the mobilization of this organic compound evolves temporally and spatially depends on a large number of controlling parameters and is largely site specific. Therefore, for more 'truly' predictive work, further sensitivity studies should be conducted, and further modeling should be integrated with site-specific laboratory and/or field experimental data. The co-injection of H{sub 2}S with CO{sub 2} into a deep saline aquifer was also simulated. In addition, the model considered leakage of the supercritical CO{sub 2}+H{sub 2}S mixture along a preferential p

Zheng, L.; Spycher, N.; Xu, T.; Apps, J.; Kharaka, Y.; Birkholzer, J.T.

2010-11-05T23:59:59.000Z

235

Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems  

E-Print Network (OSTI)

brines co-produced with crude oil (Zarrella et al. , 1967)brines co-produced with crude oil (Zarrella et al. , 1967)of Production Condensate Crude oil Crude oil Crude oil Crude

Zheng, L.

2011-01-01T23:59:59.000Z

236

First-principles studies of H2S adsorption and dissociation on metal surfaces  

DOE Green Energy (OSTI)

rates are high enough to sustain the separation process at conditions relevant to gasification applications

Alfonso, D.R.

2008-01-01T23:59:59.000Z

237

Synthesis and Characterization of CO- and H2S-Tolerant Electrocatalysts for PEM Fuel Cell  

DOE Green Energy (OSTI)

The present state-of-art Proton Exchange Membrane Fuel Cell (PEMFC) technology is based on platinum (Pt) as a catalyst for both the fuel (anode) and air (cathode) electrodes. This catalyst is highly active but susceptible to poisoning by CO, which may be present in the H{sub 2}-fuel used or may be introduced during the fuel processing. Presence of trace amount of CO and H{sub 2}S in the H{sub 2}-fuel poisons the anode irreversibly and decreases the performance of the PEMFCs. In an effort to reduce the Pt-loading and improve the PEMFC performance, we propose to synthesize a number of Pt-based binary, ternary, and quaternary electrocatalysts using Ru, Mo, Ir, Ni, and Co as a substitute for Pt. By fine-tuning the metal loadings and compositions of candidate electrocatalysts, we plan to minimize the cost and optimize the catalyst activity and performance in PEMFC. The feasibility of the novel electrocatalysts will be demonstrated in the proposed effort with gas phase CO and H{sub 2}S concentrations typical of those found in reformed fuel gas with coal/natural gas/methanol feedstocks. During this reporting period we used four Pt-based electrocatalysts (Pt/Ru/Mo/Se, Pt/Ru/Mo/Ir, Pt/Ru/Mo/W, Ptr/Ru/Mo/Co) in MEAs and these were evaluated for CO-tolerance with 20 and 100 ppm CO concentration in H{sub 2}-fuel. From current-voltage performance study, the catalytic activity was found in the increasing order of Pt/Ru/Mo/Ir > Pt/Ru/Mo/W > Pt/Ru/Mo/Co > Pt/Ru/MO/Se. From preliminary cost analysis it appears that could of the catalyst metal loading can reduced by 40% to 60% depending on the selection of metal combinations without compromising the fuel cell performance.

Shamsuddin Ilias

2006-05-18T23:59:59.000Z

238

Synthesis and Characterization of CO- and H2S-Tolerant Electrocatalysts for PEM Fuel Cell  

DOE Green Energy (OSTI)

The present state-of-art Proton Exchange Membrane Fuel Cell (PEMFC) technology is based on platinum (Pt) as a catalyst for both the fuel (anode) and air (cathode) electrodes. This catalyst is highly active but susceptible to poisoning by CO, which may be present in the H{sub 2}-fuel used or may be introduced during the fuel processing. Presence of trace amount of CO and H{sub 2}S in the H{sub 2}-fuel poisons the anode irreversibly and decreases the performance of the PEMFCs. In an effort to reduce the Pt-loading and improve the PEMFC performance, we propose to synthesize a number of Pt-based binary, ternary, and quaternary electrocatalysts using Ru, Mo, Ir, Ni, and Co as a substitute for Pt. By fine-tuning the metal loadings and compositions of candidate electrocatalysts, we plan to minimize the cost and optimize the catalyst activity and performance in PEMFC. The feasibility of the novel electrocatalysts will be demonstrated in the proposed effort with gas phase CO and H{sub 2}S concentrations typical of those found in reformed fuel gas with coal/natural gas/methanol feedstocks. During this reporting period we synthesized several tri-metallic electrocatalysts catalysts (Pt/Ru/Mo, Pt/Ru/Ir, Pt/Ru/W, Ptr/Ru/Co, and Pt/Ru/Se on Vulcan XG72 Carbon) by ultrasonication method. These catalysts were tested in MEAs for CO tolerance at 20 and 100 ppm CO concentrations. From Galvonstatic study the catalytic activity was found in the order of: Pt/Ru/Mo/C > Pt/Ru/Ir/C > Pt/Ru/W/C > Ptr/Ru/Co/C > and Pt/Ru/Se. The catalysts performed very well at 20 ppm CO but at 100 ppm CO performance dropped significantly.

Shamsuddin Ilias

2005-07-20T23:59:59.000Z

239

Introduction to hydrogen energy  

SciTech Connect

The book comprises the following papers: primary energy sources suitable for hydrogen production, thermochemical and electrolytic production of hydrogen from water, hydrogen storage and transmission methods, hydrogen-oxygen utilization devices, residential and industrial utilization of energy, industrial utilization of hydrogen, use of hydrogen as a fuel for transportation, an assessment of hydrogen-fueled navy ships, mechanisms and strategies of market penetration for hydrogen, and fossil/hydrogen energy mix and population control. A separate abstract was prepared for each paper for ERDA Energy Research Abstracts (ERA). (LK)

Veziroglu, T.N. (ed.)

1975-01-01T23:59:59.000Z

240

Mechanochemical hydrogenation of coal  

DOE Patents (OSTI)

Hydrogenation of coal is improved through the use of a mechanical force to reduce the size of the particulate coal simultaneously with the introduction of gaseous hydrogen, or other hydrogen donor composition. Such hydrogen in the presence of elemental tin during this one-step size reduction-hydrogenation further improves the yield of the liquid hydrocarbon product.

Yang, Ralph T. (Tonawanda, NY); Smol, Robert (East Patchogue, NY); Farber, Gerald (Elmont, NY); Naphtali, Leonard M. (Washington, DC)

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

Sulfur condensation in Claus catalyst  

SciTech Connect

The heterogeneous reactions in which catalyst deactivation by pore plugging occur are listed and include: coke formation in petroleum processing, especially hydrocracking and hydrodesulfurization catalysts; steam reforming and methnation catalysts; ammonia synthesis catalyst; and automobile exhause catalysts. The authors explain how the Claus process converts hydrogen sulfide produced by petroleum desulfurization units and gas treatment processes into elemental sulfur and water. More than 15 million tons of sulfur are recovered annually by this process. Commercial Claus plants appear to operate at thermodynamic equilibrium. Depending on the H2S content of the feed and the number of reactors, total H2S conversion to elemental sulfur can exceed 95%.

Schoffs, G.R.

1985-02-01T23:59:59.000Z

242

Massive sulfide deposits and hydrothermal solutions: incremental reaction modeling of mineral precipitation and sulfur isotopic evolution  

DOE Green Energy (OSTI)

Incremental reaction path modeling of chemical and sulfur isotopic reactions occurring in active hydrothermal vents on the seafloor, in combination with chemical and petrographic data from sulfide samples from the seafloor and massive sulfide ore deposits, allows a detailed examination of the processes involved. This paper presents theoretical models of reactions of two types: (1) adiabatic mixing between hydrothermal solution and seawater, and (2) reaction of hydrothermal solution with sulfide deposit materials. In addition, reaction of hydrothermal solution with sulfide deposit minerals and basalt in feeder zones is discussed.

Janecky, D.R.

1986-01-01T23:59:59.000Z

243

EXTRACTION OF HEXAVALENT PLUTONIUM FROM AQUEOUS ACIDIC SOLUTIONS WITH ETHYL SULFIDE  

DOE Patents (OSTI)

A process is described for extracting Pu>s6/sup > /om an aqueous ammonium nitrate-containing nitric acid solution with ethyl sulfide.

Seaborg, G.T.

1961-06-27T23:59:59.000Z

244

Spectral induced polarization and electrodic potential monitoring of microbially mediated iron sulfide transformations  

Science Conference Proceedings (OSTI)

Stimulated sulfate-reduction is a bioremediation technique utilized for the sequestration of heavy metals in the subsurface.We performed laboratory column experiments to investigate the geoelectrical response of iron sulfide transformations by Desulfo vibriovulgaris. Two geoelectrical methods, (1) spectral induced polarization (SIP), and (2) electrodic potential measurements, were investigated. Aqueous geochemistry (sulfate, lactate, sulfide, and acetate), observations of precipitates (identified from electron microscopy as iron sulfide), and electrodic potentials on bisulfide ion (HS) sensitive silver-silver chloride (Ag-AgCl) electrodes (630 mV) were diagnostic of induced transitions between an aerobic iron sulfide forming conditions and aerobic conditions promoting iron sulfide dissolution. The SIP data showed 10m rad anomalies during iron sulfide mineralization accompanying microbial activity under an anaerobic transition. These anomalies disappeared during iron sulfide dissolution under the subsequent aerobic transition. SIP model parameters based on a Cole-Cole relaxation model of the polarization at the mineral-fluid interface were converted to (1) estimated biomineral surface area to pore volume (Sp), and (2) an equivalent polarizable sphere diameter (d) controlling the relaxation time. The temporal variation in these model parameters is consistent with filling and emptying of pores by iron sulfide biofilms, as the system transitions between anaerobic (pore filling) and aerobic (pore emptying) conditions. The results suggest that combined SIP and electrodic potential measurements might be used to monitor spatiotemporal variability in microbial iron sulfide transformations in the field.

Hubbard, Susan; Personna, Y.R.; Ntarlagiannis, D.; Slater, L.; Yee, N.; O'Brien, M.; Hubbard, S.

2008-02-15T23:59:59.000Z

245

Lithium Super-Ionic Sulfide Carbon (LiSISC) Composite for Li-S ...  

Lithium Super-Ionic Sulfide Carbon (LiSISC) Composite for Li-S Batteries Note: The technology described above is an early stage opportunity. Licensing ...

246

FCT Hydrogen Production: Basics  

NLE Websites -- All DOE Office Websites (Extended Search)

Basics to someone by E-mail Basics to someone by E-mail Share FCT Hydrogen Production: Basics on Facebook Tweet about FCT Hydrogen Production: Basics on Twitter Bookmark FCT Hydrogen Production: Basics on Google Bookmark FCT Hydrogen Production: Basics on Delicious Rank FCT Hydrogen Production: Basics on Digg Find More places to share FCT Hydrogen Production: Basics on AddThis.com... Home Basics Central Versus Distributed Production Current Technology R&D Activities Quick Links Hydrogen Delivery Hydrogen Storage Fuel Cells Technology Validation Manufacturing Codes & Standards Education Systems Analysis Contacts Basics Photo of hydrogen production in photobioreactor Hydrogen, chemical symbol "H", is the simplest element on earth. An atom of hydrogen has only one proton and one electron. Hydrogen gas is a diatomic

247

Energy Basics: Hydrogen Fuel  

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

EERE: Energy Basics Hydrogen Fuel Hydrogen is a clean fuel that, when consumed, produces only water. Hydrogen can be produced from a variety of domestic sources, such as coal,...

248

NREL: Learning - Hydrogen Basics  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Basics Hydrogen is a clean-burning fuel, and when combined with oxygen in a fuel cell, it produces heat and electricity with only water vapor as a by-product. But hydrogen...

249

Solar Hydrogen Conversion Background  

E-Print Network (OSTI)

Solar Hydrogen Conversion Background: The photoelectrochemical production of hydrogen has drawn properties In order to develop better materials for solar energy applications, in-depth photoelectrochemical simulated solar irradiance. Hydrogen production experiments are conducted in a sealed aluminum cell

Raftery, Dan

250

The Hype About Hydrogen  

E-Print Network (OSTI)

Review: The Hype About Hydrogen By Joseph J. Romm ReviewedJ. Romm. The Hype About Hydrogen. Washington, DC: IslandEmissions. The Hype About Hydrogen describes in detail what

Mirza, Umar Karim

2006-01-01T23:59:59.000Z

251

FCT Hydrogen Storage: Basics  

NLE Websites -- All DOE Office Websites (Extended Search)

Basics to someone by E-mail Share FCT Hydrogen Storage: Basics on Facebook Tweet about FCT Hydrogen Storage: Basics on Twitter Bookmark FCT Hydrogen Storage: Basics on Google...

252

Development of Low-cost Hydrogen Sensors  

DOE Green Energy (OSTI)

This research was aimed at understanding and improving the speed and reproducibility of our resistive hydrogen sensor, along with complementary efforts in manufacturability and further design improvements. Maskworks were designed to allow for the printing and firing of multi-sensor layouts (15 per substrate) and a large batch of these sensors was produced using standard thick-film manufacturing lines. Piece-to-piece variations of both the as-made resistance and the response of these sensors to hydrogen were within acceptable tolerances, and the sensor design has now been released for commercial prototyping. Automated testing was begun in order to develop long-term performance data. Dynamic response of selected sensors was measured before and after exposures to methane, hydrogen sulfide, and carbon monoxide, in order to assess the effects of interference gases and surface poisoning. As expected, H{sub 2}S degrades the sensor somewhat, whereas CH{sub 4} and CO do not create significant interference when air is present.

Lauf, R.J.

2001-09-25T23:59:59.000Z

253

Hydrogen (H2)  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen (H2) Hydrogen (H2) Historical Records from Ice Cores Deuterium Record from Dome C, Antarctica Continuous Measurements Advanced Global Atmospheric Gases Experiment (AGAGE,...

254

Hydrogen Program Overview  

Fuel Cell Technologies Publication and Product Library (EERE)

This 2-page fact sheet provides a brief introduction to the DOE Hydrogen Program. It describes the program mission and answers the question: “Why Hydrogen

255

Hydrogen and Infrastructure Costs  

NLE Websites -- All DOE Office Websites (Extended Search)

FUEL CELL TECHNOLOGIES PROGRAM Hydrogen and Infrastructure Costs Hydrogen Infrastructure Market Readiness Workshop Washington D.C. February 17, 2011 Fred Joseck U.S. Department of...

256

Sulfide-Driven Arsenic Mobilization from Arsenopyrite and Black Shale Pyrite  

Science Conference Proceedings (OSTI)

We examined the hypothesis that sulfide drives arsenic mobilization from pyritic black shale by a sulfide-arsenide exchange and oxidation reaction in which sulfide replaces arsenic in arsenopyrite forming pyrite, and arsenide (As-1) is concurrently oxidized to soluble arsenite (As+3). This hypothesis was tested in a series of sulfide-arsenide exchange experiments with arsenopyrite (FeAsS), homogenized black shale from the Newark Basin (Lockatong formation), and pyrite isolated from Newark Basin black shale incubated under oxic (21% O2), hypoxic (2% O2, 98% N2), and anoxic (5% H2, 95% N2) conditions. The oxidation state of arsenic in Newark Basin black shale pyrite was determined using X-ray absorption-near edge structure spectroscopy (XANES). Incubation results show that sulfide (1 mM initial concentration) increases arsenic mobilization to the dissolved phase from all three solids under oxic and hypoxic, but not anoxic conditions. Indeed under oxic and hypoxic conditions, the presence of sulfide resulted in the mobilization in 48 h of 13-16 times more arsenic from arsenopyrite and 6-11 times more arsenic from isolated black shale pyrite than in sulfide-free controls. XANES results show that arsenic in Newark Basin black shale pyrite has the same oxidation state as that in FeAsS (-1) and thus extend the sulfide-arsenide exchange mechanism of arsenic mobilization to sedimentary rock, black shale pyrite. Biologically active incubations of whole black shale and its resident microorganisms under sulfate reducing conditions resulted in sevenfold higher mobilization of soluble arsenic than sterile controls. Taken together, our results indicate that sulfide-driven arsenic mobilization would be most important under conditions of redox disequilibrium, such as when sulfate-reducing bacteria release sulfide into oxic groundwater, and that microbial sulfide production is expected to enhance arsenic mobilization in sedimentary rock aquifers with major pyrite-bearing, black shale formations.

Zhu, W.; Young, L; Yee, N; Serfes, M; Rhine, E; Reinfelder, J

2008-01-01T23:59:59.000Z

257

Hydrogen Permeability and Integrity of Hydrogen  

E-Print Network (OSTI)

- Materials Solutions for Hydrogen Delivery in Pipelines - Natural Gas Pipelines for Hydrogen Use #12;3 OAK embrittlement of pipeline steels under high gaseous pressures relevant to hydrogen gas transmission pipeline behavior as function of pressure and temperature - Effects of steel composition, microstructure

258

www.hydrogenics.com Hydrogenics Corporation  

E-Print Network (OSTI)

integration capabilities · Control and load profile software Hydrogen Energy Storage and Power Systems · Off Power ...Powering Change #12;www.hydrogenics.com Hydrogenics Profile Designer and manufacturer-grid renewable power · On-grid community or residential power · Grid incentives for load control · Renewable

259

Hydrogen monitoring for power plant applications using SiC sensors  

DOE Green Energy (OSTI)

We have developed a high-temperature gas sensing system for the detection of combustion products under harsh conditions, such as an energy plant. The sensor, based on the wide band gap semiconductor silicon carbide (SiC), is a catalytic gate field-effect device (Pt–SiO2–SiC) that can detect hydrogen-containing species in chemically reactive, high-temperature environments. The hydrogen response of the device in an industrially robust module was determined under both laboratory and industrial conditions (1000 sccm of 350 °C gas) from 52 ppm to 50% H2, with the sensor held at 620 °C. From our data we find that the hydrogen adsorption kinetics at the catalyst–oxide interface are well fitted by the linearized Langmuir adsorption isotherm. For hydrogen monitoring in a coal gasification application, we investigated the effect of common interferants on the device response to a 20% H2 gas stream. Within our signal to noise ratio, 40% CO and 5% CH4 had no measurable effect and a 2000 ppm pulse of H2S did not poison the Pt sensing film. We have demonstrated the long-term reliability of our SiC sensor and the robustness of the sensor packaging techniques, as all the data are from a single device, obtained during 5 days of industrial measurements in addition to 480 continuous hours of operation under laboratory conditions.

Loloee, R. (Michigan State Univ., E. Lansing, MI); Chorpening, B.T.; Beer, S.K.; Ghosh, R.N. (Michigan State Univ., E. Lansing, MI)

2008-01-29T23:59:59.000Z

260

Hydrogen monitoring for power plant applications using SiC sensors  

DOE Green Energy (OSTI)

We have developed a high-temperature gas sensing system for the detection of combustion products under harsh conditions, such as an energy plant. The sensor, based on the wide band gap semiconductor silicon carbide (SiC), is a catalytic gate field-effect device (Pt–SiO2–SiC) that can detect hydrogen-containing species in chemically reactive, high-temperature environments. The hydrogen response of the device in an industrially robust module was determined under both laboratory and industrial conditions (1000 sccm of 350 ?C gas) from 52 ppm to 50% H2, with the sensor held at 620 ?C. From our data we find that the hydrogen adsorption kinetics at the catalyst–oxide interface are well fitted by the linearized Langmuir adsorption isotherm. For hydrogen monitoring in a coal gasification application, we investigated the effect of common interferants on the device response to a 20% H2 gas stream. Within our signal to noise ratio, 40% CO and 5% CH4 had no measurable effect and a 2000 ppm pulse of H2S did not poison the Pt sensing film. We have demonstrated the long-term reliability of our SiC sensor and the robustness of the sensor packaging techniques, as all the data are from a single device, obtained during 5 days of industrial measurements in addition to ?480 continuous hours of operation under laboratory conditions.

Reza Loloee; Benjamin Chorpening; Steve Beer; Ruby N. Ghosha

2007-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

FCT Hydrogen Delivery: Hydrogen Delivery R&D Activities  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Delivery R&D Activities to someone by E-mail Share FCT Hydrogen Delivery: Hydrogen Delivery R&D Activities on Facebook Tweet about FCT Hydrogen Delivery: Hydrogen Delivery...

262

Improved oxidation sulfidation resistance of Fe-Cr-Ni alloys  

DOE Patents (OSTI)

High temperature resistance of Fe-Cr-Ni alloy compositions to oxidative and/or sulfidative conditions is provided by the incorporation of about 1 to 8 wt % of Zr or Nb and results in a two-phase composition having an alloy matrix as the first phase and a fine grained intermetallic composition as the second phase. The presence and location of the intermetallic composition between grains of the matrix provides mechanical strength, enhanced surface scale adhesion, and resistance to corrosive attack between grains of the alloy matrix at temperatures of 500 to 1000/sup 0/C.

Natesan, K.; Baxter, D.J.

1983-07-26T23:59:59.000Z

263

Hydrogen Pipeline Discussion  

NLE Websites -- All DOE Office Websites (Extended Search)

praxair.com praxair.com Copyright © 2003, Praxair Technology, Inc. All rights reserved. Hydrogen Pipeline Discussion BY Robert Zawierucha, Kang Xu and Gary Koeppel PRAXAIR TECHNOLOGY CENTER TONAWANDA, NEW YORK DOE Hydrogen Pipeline Workshop Augusta, GA August 2005 2 Introduction Regulatory and technical groups that impact hydrogen and hydrogen systems ASME, DOE, DOT etc, Compressed Gas Association activities ASTM TG G1.06.08 Hydrogen pipelines and CGA-5.6 Selected experience and guidance Summary and recommendations 3 CGA Publications Pertinent to Hydrogen G-5: Hydrogen G-5.3: Commodity Specification for Hydrogen G-5.4: Standard for Hydrogen Piping at Consumer Locations G-5.5: Hydrogen Vent Systems G-5.6: Hydrogen Pipeline Systems (IGC Doc 121/04/E) G-5.7: Carbon Monoxide and Syngas

264

Hydrogen | Open Energy Information  

Open Energy Info (EERE)

<-- Back to Hydrogen Gateway <-- Back to Hydrogen Gateway Technical Reference for Hydrogen Compatibility of Materials KIA FCEV SUNRISE MG 7955 6 7.jpg Guidance on materials selection for hydrogen service is needed to support the deployment of hydrogen as a fuel as well as the development of codes and standards for stationary hydrogen use, hydrogen vehicles, refueling stations, and hydrogen transportation. Materials property measurement is needed on deformation, fracture and fatigue of metals in environments relevant to this hydrogen economy infrastructure. The identification of hydrogen-affected material properties such as strength, fracture resistance and fatigue resistance are high priorities to ensure the safe design of load-bearing structures. To support the needs of the hydrogen community, Sandia National

265

DOE Permitting Hydrogen Facilities: Hydrogen Fueling Stations  

NLE Websites -- All DOE Office Websites (Extended Search)

Stations Stations Public-use hydrogen fueling stations are very much like gasoline ones. In fact, sometimes, hydrogen and gasoline cars can be fueled at the same station. These stations offer self-service pumps, convenience stores, and other services in high-traffic locations. Photo of a Shell fueling station showing the site convenience store and hydrogen and gasoline fuel pumps. This fueling station in Washington, D.C., provides drivers with both hydrogen and gasoline fuels Many future hydrogen fueling stations will be expansions of existing fueling stations. These facilities will offer hydrogen pumps in addition to gasoline or natural gas pumps. Other hydrogen fueling stations will be "standalone" operations. These stations will be designed and constructed to

266

Hydrogen & Our Energy Future  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Program Hydrogen Program www.hydrogen.energy.gov Hydrogen & Our Energy Future  | HydrOgEn & Our EnErgy FuturE U.S. Department of Energy Hydrogen Program www.hydrogen.energy.gov u.S. department of Energy |  www.hydrogen.energy.gov Hydrogen & Our Energy Future Contents Introduction ................................................... p.1 Hydrogen - An Overview ................................... p.3 Production ..................................................... p.5 Delivery ....................................................... p.15 Storage ........................................................ p.19 Application and Use ........................................ p.25 Safety, Codes and Standards ............................... p.33

267

Initiators of coal hydrogenation  

Science Conference Proceedings (OSTI)

The initiators examined include cyclic and linear silico-organic compounds, the effects of which on the hydrogenation process are studied. The substances not only localize the active radicals before these are stabilised by hydrogen, but actually activate the destruction reaction of the coal substance and in this way generate atomic hydrogen: radical polymerization inhibitors thus convert to activators and hydrogen transfer. (8 refs.)

Krichko, A.A.; Dembovskaya, E.A.; Gorlov, E.G.

1983-01-01T23:59:59.000Z

268

Facilities/Staff Hydrogen  

Science Conference Proceedings (OSTI)

Thermophysical Properties of Hydrogen. FACILITIES and STAFF. The Thermophysical Properties Division is the Nation's ...

269

Composition for absorbing hydrogen  

DOE Patents (OSTI)

A hydrogen absorbing composition. The composition comprises a porous glass matrix, made by a sol-gel process, having a hydrogen-absorbing material dispersed throughout the matrix. A sol, made from tetraethyl orthosilicate, is mixed with a hydrogen-absorbing material and solidified to form a porous glass matrix with the hydrogen-absorbing material dispersed uniformly throughout the matrix. The glass matrix has pores large enough to allow gases having hydrogen to pass through the matrix, yet small enough to hold the particles dispersed within the matrix so that the hydrogen-absorbing particles are not released during repeated hydrogen absorption/desorption cycles.

Heung, Leung K. (Aiken, SC); Wicks, George G. (Aiken, SC); Enz, Glenn L. (N. Augusta, SC)

1995-01-01T23:59:59.000Z

270

Composition for absorbing hydrogen  

DOE Patents (OSTI)

A hydrogen absorbing composition is described. The composition comprises a porous glass matrix, made by a sol-gel process, having a hydrogen-absorbing material dispersed throughout the matrix. A sol, made from tetraethyl orthosilicate, is mixed with a hydrogen-absorbing material and solidified to form a porous glass matrix with the hydrogen-absorbing material dispersed uniformly throughout the matrix. The glass matrix has pores large enough to allow gases having hydrogen to pass through the matrix, yet small enough to hold the particles dispersed within the matrix so that the hydrogen-absorbing particles are not released during repeated hydrogen absorption/desorption cycles.

Heung, L.K.; Wicks, G.G.; Enz, G.L.

1995-05-02T23:59:59.000Z

271

FCT Hydrogen Storage: Hydrogen Storage R&D Activities  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Storage R&D Activities Hydrogen Storage R&D Activities to someone by E-mail Share FCT Hydrogen Storage: Hydrogen Storage R&D Activities on Facebook Tweet about FCT Hydrogen Storage: Hydrogen Storage R&D Activities on Twitter Bookmark FCT Hydrogen Storage: Hydrogen Storage R&D Activities on Google Bookmark FCT Hydrogen Storage: Hydrogen Storage R&D Activities on Delicious Rank FCT Hydrogen Storage: Hydrogen Storage R&D Activities on Digg Find More places to share FCT Hydrogen Storage: Hydrogen Storage R&D Activities on AddThis.com... Home Basics Current Technology DOE R&D Activities National Hydrogen Storage Compressed/Liquid Hydrogen Tanks Testing and Analysis Quick Links Hydrogen Production Hydrogen Delivery Fuel Cells Technology Validation Manufacturing Codes & Standards

272

Development of copper sulfide/cadmium sulfide thin-film solar cells  

DOE Green Energy (OSTI)

The purpose of this work has been to identify aspects of cell fabrication and treatment which are critical for achieving high efficiency Cu/sub 2/S/CdS solar cells. In approaching the problem several comparisons were made of the effects of specific steps in two methods of cell fabrication. These methods had previously given cells of about 6% and a maximum of 9% efficiency. Three areas requiring special attention and specific means to achieve acceptable results were identified. (1) The Cu/sub 2/S/CdS heterojunction area must be minimized. If single source evaporations of CdS are made on substrates whose temperatures (approx. 220/sup 0/C) are monitored and controlled using welded thermocouples, the CdS films will have adequately large grains (grain diameter greater than or equal to 2 ..mu..m) and will not develop significant etch pits during texturing in a mild etchant solution. (2) The termination of the wet barrier processing steps must be done carefully. An acceptable termination involves minimizing the amount of cuprous chloride retained on the cell surface during transfer to a rinsing stage while providing adequate exclusion of air from the space above the surface of the cuprous chloride solution. (3) Once formed, the Cu/sub 2/S layer should not be exposed to high temperatures (>100/sup 0/C) for long periods of time (> 5 min) if surface adsorbed moisture or oxygen are present. Heat treatments in ampoules under flowing hydrogen atmospheres should be preceded and followed by periods of at least 30 minutes at room temperature in the reducing ambient. If all these precautions are taken, wet chemical barrier processing of thermally evaporated CdS films on zinc-plated copper foil substrates yields cells of nearly 8% conversion efficiency without AR coating.

Szedon, J.R.; Biter, W.J.; Abel, J.A.; Dickey, H.C.; Shirland, F.A.

1981-02-27T23:59:59.000Z

273

DOE Hydrogen Analysis Repository: Hydrogen Modeling Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Modeling Projects Modeling Projects Below are models grouped by topic. These models are used to analyze hydrogen technology, infrastructure, and other areas related to the development and use of hydrogen. Cross-Cutting Distributed Energy Resources Customer Adoption Model (DER_CAM) Hydrogen Deployment System (HyDS) Model and Analysis Hydrogen Technology Assessment and Selection Model (HyTASM) Renewable Energy Power System Modular Simulator (RPM-Sim) Stranded Biogas Decision Tool for Fuel Cell Co-Production Energy Infrastructure All Modular Industry Growth Assessment (AMIGA) Model Building Energy Optimization (BEopt) Distributed Energy Resources Customer Adoption Model (DER_CAM) Hydrogen Deployment System (HyDS) Model and Analysis Hydrogen Technology Assessment and Selection Model (HyTASM)

274

DOE Hydrogen and Fuel Cells Program: Hydrogen Analysis Resource Center  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Production Hydrogen Production Hydrogen Delivery Hydrogen Storage Hydrogen Manufacturing Fuel Cells Applications/Technology Validation Safety Codes and Standards Education Basic Research Systems Analysis Analysis Repository H2A Analysis Hydrogen Analysis Resource Center Scenario Analysis Well-to-Wheels Analysis Systems Integration U.S. Department of Energy Search help Home > Systems Analysis > Hydrogen Analysis Resource Center Printable Version Hydrogen Analysis Resource Center The Hydrogen Analysis Resource Center provides consistent and transparent data that can serve as the basis for hydrogen-related calculations, modeling, and other analytical activities. This new site features the Hydrogen Data Book with data pertinent to hydrogen infrastructure analysis; links to external databases related to

275

Hydrogen Program Contacts; DOE Hydrogen Program FY 2008 Annual...  

NLE Websites -- All DOE Office Websites (Extended Search)

1 FY 2008 Annual Progress Report DOE Hydrogen Program JoAnn Milliken, DOE Hydrogen Program Manager and Chief Engineer Office of Hydrogen, Fuel Cells and Infrastructure Technologies...

276

DOE Hydrogen Analysis Repository: Hydrogen Production from Renewables...  

NLE Websites -- All DOE Office Websites (Extended Search)

at the 1998 DOE Hydrogen Program Review. Keywords: Technoeconomic analysis; hydrogen production; costs; hydrogen storage; renewable Purpose To determine technical and economic...

277

Theoretical Studies on Heavy Metal Sulfides in Solution  

DOE Green Energy (OSTI)

'Calculating the stabilities, Raman and UV spectra and acidities of As sulfides in aqueous solution', J. A. Tossell, M. D. Zimmermann and G. R. Helz. Some of the Raman spectra obtained by reacting aqueous As(OH)3 with aqueous bisulfide are shown, taken from Wood, et al. (2002). To interpret these spectra we have carried out an extensive series of calculations, detailed for the case of AsS(SH){sub 2}{sup -} in Table 1 below. By employing state of the art quantum chemical techniques to determine gas-phase harmonic and anharmonic frequencies and solution phase corrections we can accurately match features in the experimental spectrum shown in the top figure. The AsS(SH){sub 2}{sup -}...22 H{sub 2}O nanocluster employed is shown in the lower figure. For this species we have calculated the equilibrium structure and the harmonic vibrational spectrum at the CBSB7 B3LYP level. For the free solute species AsS(SH){sub 2}{sup -} we have carried out a whole series of calculations, evaluating harmonic and anharmonic vibrational frequencies at a number of different quantum mechanical levels. In the spectra below, Fig. 3 and Fig. 5 from Wood, et al. (2002), the features around 700-800 cm{sup -1} are attributed to As-O stretches and those around 350-450 cm{sup -1} to As-S stretches. In the nanocluster an isolated vibrational feature is observed at 425 cm{sup -1}, an As=S stretch, close to the value (415 cm{sup -1}) determined by Wood, et al. (2002). Analysis of the calculated frequencies for AsS(SH){sub 2}{sup -} within a polarizable continuum model yields a similar result. Taking the highest level harmonic results, obtained from a CCSD calculation, and adding anharmonic and PCM corrections at the B3LYP level (designated (3) + (5) - (1) in Table 1) gives a frequency for the intense high frequency As=S stretch within 15 cm{sup -1} of experiment. Although there is still interesting work to be done on the stabilities and the Raman and UV spectra of As sulfides, most of the basic concepts have been worked out and we are therefore proposing to move to a new area, that of humic acids (while continuing our studies complexes formed by As oxides and sulfides, now applied to functional groups present in humic acids).

Tossell, John A.

2007-10-31T23:59:59.000Z

278

Ethanol synthesis and water gas shift over bifunctional sulfide catalysts. Final technical progress report, September 12, 1991--December 11, 1994  

DOE Green Energy (OSTI)

The objective of this research was to investigate sulfur-resistant catalysts for the conversion of synthesis gas having H{sub 2}/CO {le} 1 into C{sub 1}--C{sub 4} alcohols, especially ethanol, by a highly selective and efficient pathway, while also promoting the water gas shift reaction (WGSR). The catalysts chosen are bifunctional, base-hydrogenation, sulfur-tolerant transition metal sulfides with heavy alkali, e.g. Cs{sup +}, promoter dispersed on their surfaces. The modes of activation of H{sub 2} and CO on MoS{sub 2} and alkali-doped MoS{sub 2} were considered, and computational analyses of the thermodynamic stability of transition metal sulfides and of the electronic structure of these sulfide catalysts were carried out. In the preparation of the cesium-promoted MoS{sub 2} catalysts, a variety of preparation methods using CsOOCH were examined. In all cases, doping with CsOOCH led to a lost of surface area. The undoped molybdenum disulfide catalyst only produced hydrocarbons. Cs-doped MoS{sub 2} catalysts all produced linear alcohols, along with smaller amounts of hydrocarbons. With a 20 wt% CsOOCH/MoS{sub 2} catalyst, temperature, pressure, and flow rate dependences of the synthesis reactions were investigated in the presence and absence of H{sub 2}S in the H{sub 2}/CO = 1/1 synthesis gas during short term testing experiments. It was shown that with a carefully prepared 10 wt% CsOOCH/MoS{sub 2} catalyst, reproducible and high alcohol synthesis activity could be obtained. For example, at 295 C with H{sub 2}/CO = 1 synthesis gas at 8.3 MPa and with GHSV = 7,760 l/kg cat/hr, the total alcohol space time yield was ca 300 g/kg cat/hr (accompanied with a hydrocarbon space time yield of ca 60 g/kg cat/hr). Over a testing period of ca 130 hr, no net deactivation of the catalyst was observed. 90 refs., 82 figs., 14 tabs.

Klier, K.; Herman, R.G.; Deemer, M.; Richards-Babb, M.; Carr, T.

1995-07-01T23:59:59.000Z

279

DOE Hydrogen Analysis Repository: Distributed Hydrogen Production...  

NLE Websites -- All DOE Office Websites (Extended Search)

Projects by Date U.S. Department of Energy Distributed Hydrogen Production via Steam Methane Reforming Project Summary Full Title: Well-to-Wheels Case Study: Distributed...

280

DOE Hydrogen Analysis Repository: Centralized Hydrogen Production...  

NLE Websites -- All DOE Office Websites (Extended Search)

Coal Gasification with Sequestration Project Summary Full Title: Well-to-Wheels Case Study: Centralized Hydrogen Production from Coal Gasification with Sequestration Project ID:...

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

DOE Hydrogen Analysis Repository: Hydrogen Pathways Analysis  

NLE Websites -- All DOE Office Websites (Extended Search)

- 2020 ProductsDeliverables Description: FY 2012 Progress Report Publication Title: FY 2012 DOE Hydrogen Program Annual Progress Report ArticleAbstract Title: Effects of...

282

DOE Hydrogen Analysis Repository: Hydrogen Deployment System...  

NLE Websites -- All DOE Office Websites (Extended Search)

routine to determine the layout of a least-cost infrastructure. Keywords: Hydrogen production; electrolysis; costs; fuel cells Purpose Initially, electrolytic H2 production...

283

DOE Hydrogen Analysis Repository: Centralized Hydrogen Production...  

NLE Websites -- All DOE Office Websites (Extended Search)

Biomass feedstock price Units: million Btu Supporting Information: LHV Description: Electricity price Units: kWh Description: Hydrogen fill pressure Units: psi Description:...

284

DOE Hydrogen Analysis Repository: Hydrogen Analysis Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

of the Transition to Hydrogen Fuel Cell Vehicles Biofuels in Light-Duty Vehicles Biogas Resources Characterization Biomass Integrated Gasification Combined-Cycle Power...

285

DOE Hydrogen Analysis Repository: Hydrogen Transition Analysis...  

NLE Websites -- All DOE Office Websites (Extended Search)

Period of Performance Start: June 2005 End: May 2008 Project Description Type of Project: Model Category: Hydrogen Fuel Pathways Objectives: Use agent-based modeling to provide...

286

DOE Hydrogen Analysis Repository: Hydrogen Infrastructure Costs  

NLE Websites -- All DOE Office Websites (Extended Search)

Infrastructure Costs Project Summary Full Title: Fuel Choice for Fuel Cell Vehicles: Hydrogen Infrastructure Costs Previous Title(s): Guidance for Transportation Technologies: Fuel...

287

DOE Hydrogen Analysis Repository: Hydrogen Vehicle Safety  

NLE Websites -- All DOE Office Websites (Extended Search)

risks of hydrogen with those of more common motor vehicle fuels including gasoline, propane, and natural gas. ProductsDeliverables Description: Report Publication Title:...

288

DOE Hydrogen Analysis Repository: Hydrogen Passenger Vehicle...  

NLE Websites -- All DOE Office Websites (Extended Search)

estimated the cost of both gasoline and methanol onboard fuel processors, as well as the cost of stationary hydrogen fueling system components including steam methane reformers,...

289

DOE Hydrogen Analysis Repository: Hydrogen Technology Assessment...  

NLE Websites -- All DOE Office Websites (Extended Search)

of hydrogen fueling systems for transportation: An application of perspective-based scenario analysis using the analytic hierarchy process Project ID: 121 Principal...

290

A Lithium Superionic Sulfide Cathode for Lithium-Sulfur Batteries  

SciTech Connect

This work presents a facile synthesis approach for core-shell structured Li2S nanoparticles, which have Li2S as the core and Li3PS4 as the shell. This material functions as lithium superionic sulfide (LSS) cathode for long-lasting, energy-efficient lithium-sulfur (Li-S) batteries. The LSS has an ionic conductivity of 10-7 S cm-1 at 25 oC, which is 6 orders of magnitude higher than that of bulk Li2S (~10-13 S cm-1). The high lithium-ion conductivity of LSS imparts an excellent cycling performance to all-solid Li-S batteries, which also promises safe cycling of high-energy batteries with metallic lithium anodes.

Lin, Zhan [ORNL; Liu, Zengcai [ORNL; Dudney, Nancy J [ORNL; Liang, Chengdu [ORNL

2013-01-01T23:59:59.000Z

291

Changes in dimethyl sulfide oceanic distribution due to climate change  

SciTech Connect

Dimethyl sulfide (DMS) is one of the major precursors for aerosols and cloud condensation nuclei in the marine boundary layer over much of the remote ocean. Here we report on coupled climate simulations with a state-of-the-art global ocean biogeochemical model for DMS distribution and fluxes using present-day and future atmospheric CO{sub 2} concentrations. We find changes in zonal averaged DMS flux to the atmosphere of over 150% in the Southern Ocean. This is due to concurrent sea ice changes and ocean ecosystem composition shifts caused by changes in temperature, mixing, nutrient, and light regimes. The largest changes occur in a region already sensitive to climate change, so any resultant local CLAW/Gaia feedback of DMS on clouds, and thus radiative forcing, will be particularly important. A comparison of these results to prior studies shows that increasing model complexity is associated with reduced DMS emissions at the equator and increased emissions at high latitudes.

Elliott, Scott [Los Alamos National Laboratory (LANL); Erickson III, David J [ORNL

2011-01-01T23:59:59.000Z

292

Lithium sulfide compositions for battery electrolyte and battery electrode coatings  

Science Conference Proceedings (OSTI)

Methods of forming lithium-containing electrolytes are provided using wet chemical synthesis. In some examples, the lithium containing electroytes are composed of .beta.-Li.sub.3PS.sub.4 or Li.sub.4P.sub.2S.sub.7. The solid electrolyte may be a core shell material. In one embodiment, the core shell material includes a core of lithium sulfide (Li.sub.2S), a first shell of .beta.-Li.sub.3PS.sub.4 or Li.sub.4P.sub.2S.sub.7, and a second shell including one or .beta.-Li.sub.3PS.sub.4 or Li.sub.4P.sub.2S.sub.7 and carbon. The lithium containing electrolytes may be incorporated into wet cell batteries or solid state batteries.

Liang, Chengdu; Liu, Zengcai; Fu, Wunjun; Lin, Zhan; Dudney, Nancy J; Howe, Jane Y; Rondinone, Adam J

2013-12-03T23:59:59.000Z

293

Changes in Dimethyl Sulfide Oceanic Distribution due to Climate Change  

SciTech Connect

Dimethyl sulfide (DMS) is one of the major precursors for aerosols and cloud condensation nuclei in the marine boundary layer over much of the remote ocean. Here they report on coupled climate simulations with a state-of-the-art global ocean biogeochemical model for DMS distribution and fluxes using present-day and future atmospheric CO{sub 2} concentrations. They find changes in zonal averaged DMS flux to the atmosphere of over 150% in the Southern Ocean. This is due to concurrent sea ice changes and ocean ecosystem composition shifts caused by changes in temperature, mixing, nutrient, and light regimes. The largest changes occur in a region already sensitive to climate change, so any resultant local CLAW/Gaia feedback of DMS on clouds, and thus radiative forcing, will be particularly important. A comparison of these results to prior studies shows that increasing model complexity is associted with reduced DMS emissions at the equator and increased emissions at high latitudes.

Cameron-Smith, P; Elliott, S; Maltrud, M; Erickson, D; Wingenter, O

2011-02-16T23:59:59.000Z

294

Hydrogen in semiconductors and insulators  

E-Print Network (OSTI)

the electronic level of hydrogen (thick red bar) was notdescribing the behavior of hydrogen atoms as impuritiesenergy of interstitial hydrogen as a function of Fermi level

Van de Walle, Chris G.

2007-01-01T23:59:59.000Z

295

Liquid Hydrogen Absorber for MICE  

E-Print Network (OSTI)

REFERENCES Figure 5: Liquid hydrogen absorber and test6: Cooling time of liquid hydrogen absorber. Eight CernoxLIQUID HYDROGEN ABSORBER FOR MICE S. Ishimoto, S. Suzuki, M.

Ishimoto, S.

2010-01-01T23:59:59.000Z

296

Hydrogen Bus Technology Validation Program  

E-Print Network (OSTI)

hydrogen with compressed natural gas before dispensing theindustry. Both compressed natural gas, CNG, and hydrogen arenatural gas reformers or water electrolysers. The hydrogen must be compressed

Burke, Andy; McCaffrey, Zach; Miller, Marshall; Collier, Kirk; Mulligan, Neal

2005-01-01T23:59:59.000Z

297

Sythesis of metal sulfide nanomaerials via thermal decomposition of single-source percursors  

Science Conference Proceedings (OSTI)

In this report, we present a synthetic method for the formation of cuprous sulfide (Cu2S) and lead sulfide (PbS) nanomaterials directly on substrates from the thermolysis of single-source precursors. We find that the final morphology and arrangement of the nanomaterials may be controlled through the concentration of the dissolved precursors and choice of solvent. One-dimensional (1-D) morphologies may also be grown onto substrates with the addition of a metal catalyst layer through solution-liquid-solid (SLS) growth. These synthetic techniques may be expanded to other metal sulfide materials.

Jen-La Plante, Ilan; Zeid, Tahani W.; Yang, Peidong; Mokari, Taleb

2010-06-03T23:59:59.000Z

298

FCT Hydrogen Production: Hydrogen Production R&D Activities  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Production R&D Hydrogen Production R&D Activities to someone by E-mail Share FCT Hydrogen Production: Hydrogen Production R&D Activities on Facebook Tweet about FCT Hydrogen Production: Hydrogen Production R&D Activities on Twitter Bookmark FCT Hydrogen Production: Hydrogen Production R&D Activities on Google Bookmark FCT Hydrogen Production: Hydrogen Production R&D Activities on Delicious Rank FCT Hydrogen Production: Hydrogen Production R&D Activities on Digg Find More places to share FCT Hydrogen Production: Hydrogen Production R&D Activities on AddThis.com... Home Basics Current Technology R&D Activities Quick Links Hydrogen Delivery Hydrogen Storage Fuel Cells Technology Validation Manufacturing Codes & Standards Education Systems Analysis Contacts

299

Cadmium sulfide-copper sulfide: heterojunction cell research. Quarterly progress report-3, March 1, 1979-June 1, 1979  

DOE Green Energy (OSTI)

Progress has been made on improving the photon efficiency of the planar CdS/Cu/sub 2/S solar cell. Current in excess of 20 mA/cm/sup 2/ have been achieved. Mixed sulfide solar cells responsive to heat treatment are now being produced. The morphology of the Cu/sub 2/S/CdZnS junction has been examined and found to be significantly different than the morphology on CdS/Su/sub 2/S cells. Efficiencies measured under ELH simulation approaching 8% have been achieved. Work in the analytical task has focused on establishing the experimental techniques to study the trap levels in the CdS and to provide a working model for the voltage instabilities in some (CdZn)S/Cu/sub 2/S cells. Cells under roof top exposure continue to be monitored.

Not Available

1979-08-01T23:59:59.000Z

300

BP and Hydrogen Pipelines  

NLE Websites -- All DOE Office Websites (Extended Search)

BP and Hydrogen Pipelines BP and Hydrogen Pipelines DOE Hydrogen Pipeline Working Group Workshop August 30-31, 2005 Gary P. Yoho, P.E. i l i * Green corporate philosophy and senior management commitment * Reduced greenhouse gas emissions nine years ahead of target * Alternatives to oil are a big part of BP' including natural gas, LNG, solar and hydrogen * Hydrogen Bus Project won Australia' prestigious environmental award * UK partnership opened the first hydrogen demonstration refueling station * Two hydrogen pipelines in Houston area BP Env ronmenta Comm tment s portfolio, s most BP' * li l " li i i * i l pl i i * Li l li l * " i i l i 2 i i ll i i l pl ifi i * 8" ly idl i i l s Hydrogen Pipelines Two nes, on y a brand new 12 ne s act ve Connect Houston area chem ca ant w th a ref nery nes come off a p

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

President's Hydrogen Fuel Initiative  

NLE Websites -- All DOE Office Websites (Extended Search)

commercialization decision in 2015 leads to beginning of mass-produced hydrogen fuel cell cars by 2020. FY2006 Hydrogen Fuel Initiative Budget Request 13% 28% 12% 15% 22% 3% 6% 1%...

302

Hydrogen Posture Plan  

Fuel Cell Technologies Publication and Product Library (EERE)

The Hydrogen Posture Plan, published in December 2006, outlines a coordinated plan for activities under the Hydrogen Fuel Initiative, both at the Department of Energy and the Department of Transportat

303

Hydrogen & Our Energy Future  

Fuel Cell Technologies Publication and Product Library (EERE)

Hydrogen & Our Energy Future (40 pages) expands on DOE's series of one-page fact sheets to provide an in-depth look at hydrogen and fuel cell technologies. It provides additional information on the sc

304

Hydrogen Fuel Quality (Presentation)  

DOE Green Energy (OSTI)

Jim Ohi of NREL's presentation on Hydrogen Fuel Quality at the 2007 DOE Hydrogen Program Annual Merit Review and Peer Evaluation on May 15-18, 2007 in Arlington, Virginia.

Ohi, J.

2007-05-17T23:59:59.000Z

305

Corrosion and Hydrogen Damage  

Science Conference Proceedings (OSTI)

Mar 5, 2013 ... Advanced Materials and Reservoir Engineering for Extreme Oil & Gas Environments: Corrosion and Hydrogen Damage Sponsored by: TMS ...

306

Hydrogen Assisted Cracking  

Science Conference Proceedings (OSTI)

Environmentally Assisted Cracking (EAC): Laboratory Research and Field Experiences: Hydrogen Assisted Cracking Program Organizers: Suresh Divi, TIMET

307

Hydrogen Fuel Cell Vehicles  

E-Print Network (OSTI)

hydrogen (which would not have to be stored, and which would be distributed locady only). Filling station

Delucchi, Mark

1992-01-01T23:59:59.000Z

308

Flash hydrogenation of coal  

DOE Patents (OSTI)

A process for the hydrogenation of coal comprising the contacting of powdered coal with hydrogen in a rotating fluidized bed reactor. A rotating fluidized bed reactor suitable for use in this process is also disclosed. The coal residence time in the reactor is limited to less than 5 seconds while the hydrogen contact time is not in excess of 0.2 seconds.

Manowitz, Bernard (Brightwaters, NY); Steinberg, Meyer (Huntington Station, NY); Sheehan, Thomas V. (Hampton Bays, NY); Winsche, Warren E. (Bellport, NY); Raseman, Chad J. (Setauket, NY)

1976-01-01T23:59:59.000Z

309

Purification of Hydrogen  

DOE Patents (OSTI)

Disclosed is a process for purifying hydrogen containing various gaseous impurities by passing the hydrogen over a large surface of uranium metal at a temperature above the decomposition temperature of uranium hydride, and below the decomposition temperature of the compounds formed by the combination of the uranium with the impurities in the hydrogen.

Newton, A.S.

1950-07-31T23:59:59.000Z

310

Liquid metal hydrogen barriers  

DOE Patents (OSTI)

Hydrogen barriers which comprise liquid metals in which the solubility of hydrogen is low and which have good thermal conductivities at operating temperatures of interest. Such barriers are useful in nuclear fuel elements containing a metal hydride moderator which has a substantial hydrogen dissociation pressure at reactor operating temperatures.

Grover, George M. (Los Alamos, NM); Frank, Thurman G. (Los Alamos, NM); Keddy, Edward S. (Los Alamos, NM)

1976-01-01T23:59:59.000Z

311

Sensitive hydrogen leak detector  

DOE Patents (OSTI)

A sensitive hydrogen leak detector system using passivation of a stainless steel vacuum chamber for low hydrogen outgassing, a high compression ratio vacuum system, a getter operating at 77.5 K and a residual gas analyzer as a quantitative hydrogen sensor.

Myneni, Ganapati Rao (Yorktown, VA)

1999-01-01T23:59:59.000Z

312

Process for sodium sulfide/ferrous sulfate treatment of hexavalent chromium and other heavy metals  

SciTech Connect

433 of 9384 ) United States Patent 5,000,859 Suciu ,   et al. March 19, 1991 Process for sodium sulfide/ferrous sulfate treatment of hexavalent chromium and other heavy metals

Suciu, Dan F. (Idaho Falls, ID); Wikoff, Penny M. (Idaho Falls, ID); Beller, John M. (Idaho Falls, ID); Carpenter, Charles J. (Lynn Haven, FL)

1991-01-01T23:59:59.000Z

313

Ecodynamic and Eddy-Admitting Dimethyl Sulfide Simulations in a Global Ocean Biogeochemistry/Circulation Model  

Science Conference Proceedings (OSTI)

The authors describe planetary-scale modeling of mixed-layer dimethyl sulfide (DMS) processing and distributions, conducted at a resolution of 0.28° using the Parallel Ocean Program (POP). Ecodynamic routines embedded within POP track the ...

Shaoping Chu; Scott Elliott; Mathew Maltrud; Jose Hernandez; David Erickson

2004-11-01T23:59:59.000Z

314

The Bumpy Road to Hydrogen  

E-Print Network (OSTI)

battery- powered electric vehicles, approaches the breadth and magnitude of hydrogen’s public good benefits. What History

Sperling, Dan; Ogden, Joan M

2006-01-01T23:59:59.000Z

315

Atomic Data for Hydrogen (H )  

Science Conference Proceedings (OSTI)

... Hydrogen (H) Homepage - Introduction Finding list Select element by name. Select element by atomic number. ... Atomic Data for Hydrogen (H). ...

316

Strong Lines of Hydrogen ( H )  

Science Conference Proceedings (OSTI)

... Hydrogen (H) Homepage - Introduction Finding list Select element by name. Select element by atomic number. ... Strong Lines of Hydrogen ( H ). ...

317

Hydrogen energy assessment  

SciTech Connect

The purpose of this assessment is to define the near term and long term prospects for the use of hydrogen as an energy delivery medium. Possible applications of hydrogen are defined along with the associated technologies required for implementation. A major focus in the near term is on industrial uses of hydrogen for special applications. The major source of hydrogen in the near term is expected to be from coal, with hydrogen from electric sources supplying a smaller fraction. A number of potential applications for hydrogen in the long term are identified and the level of demand estimated. The results of a cost benefit study for R and D work on coal gasification to hydrogen and electrolytic production of hydrogen are presented in order to aid in defining approximate levels of R and D funding. A considerable amount of data is presented on the cost of producing hydrogen from various energy resources. A key conclusion of the study is that in time hydrogen is likely to play a role in the energy system; however, hydrogen is not yet competitive for most applications when compared to the cost of energy from petroleum and natural gas.

Salzano, F J; Braun, C [eds.

1977-09-01T23:59:59.000Z

318

Hydrogen Use and Safety  

NLE Websites -- All DOE Office Websites (Extended Search)

USE AND SAFETY USE AND SAFETY The lightest and most common element in the universe, hydrogen has been safely used for decades in industrial applications. Currently, over 9 million tons of hydrogen are produced in the U.S. each year and 3.2 trillion cubic feet are used to make many common products. They include glass, margarine, soap, vitamins, peanut butter, toothpaste and almost all metal products. Hydrogen has been used as a fuel since the 1950s by the National Aeronautics & Space Administration (NASA) in the U.S. space program. Hydrogen - A Safe, Clean Fuel for Vehicles Hydrogen has another use - one that can help our nation reduce its consumption of fossil fuels. Hydrogen can be used to power fuel cell vehicles. When combined with oxygen in a fuel cell, hydrogen generates electricity used

319

DOE Hydrogen Analysis Repository: Hydrogen Production by  

NLE Websites -- All DOE Office Websites (Extended Search)

Production by Photovoltaic-powered Electrolysis Production by Photovoltaic-powered Electrolysis Project Summary Full Title: Production of Hydrogen by Photovoltaic-powered Electrolysis Project ID: 91 Principal Investigator: D.L. Block Keywords: Hydrogen production; electrolysis; photovoltaic (PV) Purpose To evaluate hydrogen production from photovoltaic (PV)-powered electrolysis. Performer Principal Investigator: D.L. Block Organization: Florida Solar Energy Center Address: 1679 Clearlake Road Cocoa, FL 32922 Telephone: 321-638-1001 Email: block@fsec.ucf.edu Sponsor(s) Name: Michael Ashworth Organization: Florida Energy Office Name: Neil Rossmeissl Organization: DOE/Advanced Utilities Concepts Division Name: H.T. Everett Organization: NASA/Kennedy Space Center Project Description Type of Project: Analysis Category: Hydrogen Fuel Pathways

320

DOE Hydrogen Analysis Repository: Hydrogen Fueling Infrastructure...  

NLE Websites -- All DOE Office Websites (Extended Search)

considered.) 4. Gaseous hydrogen generated at the refueling station from natural gas by steam methane reforming, stored as a compressed gas at 5000 psi and dispensed to the vehicle...

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

DOE Hydrogen Analysis Repository: Hydrogen Analysis Projects...  

NLE Websites -- All DOE Office Websites (Extended Search)

Analysis of Early Market Transition of Fuel Cell Vehicles Macro-System Model Stranded Biogas Decision Tool for Fuel Cell Co-Production Water for Hydrogen Pathways 2010 A Portfolio...

322

Why Hydrogen? Hydrogen from Diverse Domestic Resources  

NLE Websites -- All DOE Office Websites (Extended Search)

& RELIABILITY ZERONEAR ZERO ZERONEAR ZERO EMISSIONS EMISSIONS Why Hydrogen? Biomass Hydro Wind Solar Coal Nuclear Natural Gas Oil S e q u e s t r a t i o n Biomass Hydro Wind...

323

Methanol tolerant oxygen reduction catalysts based on transition metal sulfides  

Science Conference Proceedings (OSTI)

The oxygen reduction activity and methanol tolerance of a range of transition metal sulfide electrocatalysts have been evaluated in half-cell experiments and in a liquid-feed solid polymer electrolyte direct methanol fuel cell. These catalysts were prepared in high surface area form by direct synthesis onto various surface-functionalized carbon blacks. Of the materials tested, mixed-metal catalysts based on ReRuS and MoRuS were observed to give the best oxygen reduction activities. In addition, significant increases in performance were observed when employing sulfur-functionalized carbon black, which were attributed to the preferential deposition of active Ru sites in the catalyst-preparation process. Although the intrinsic activity of the best material tested, namely, Mo{sub 2}Ru{sub 5}S{sub 5} on sulfur-treated XC-72, was lower than Pt (by ca. 1545 mV throughout the entire polarization curve), its activity relative to Pt increased significantly in methanol-contaminated electrolytes. This was due to methanol oxidation side reactions reducing the net activity of the Pt, especially at low overpotentials.

Reeve, R.W.; Christensen, P.A.; Hamnett, A.; Haydock, S.A.; Roy, S.C. [Univ. of Newcastle, Newcastle upon Tyne (United Kingdom). Dept. of Chemistry

1998-10-01T23:59:59.000Z

324

Improved cell design for lithium alloy/metal sulfide battery  

DOE Patents (OSTI)

The disclosed lithium alloy/iron sulfide cell design provides loop-like positive and negative sheet metal current collectors electrically insulated from one another by separator means, the positive collector being located outwardly of the negative collector. The collectors are initially secured within an open-ended cell housing, which allows for collector pretesting for electrical shorts prior to adding any electrode materials and/or electrolyte to the cell. Separate chambers are defined outwardly of the positive collector and inwardly of the negative collector open respectively in opposite directions toward the open ends of the cell housing; and positive and negative electrode materials can be extruded into these respective chambers via the opposite open housing ends. The chambers and cell housing ends can then be sealed closed. A cross wall structurally reinforces the cell housing and also thereby defines two cavities, and paired positive and negative collectors are disposed in each cavity and electrically connected in parallel. The cell design provides for a high specific energy output and improved operating life in that any charge-discharge cycle swelling of the positive electrode material will be inwardly against only the positive collector to minimize shorts caused by the collectors shifting relative to one another.

Kaun, T.D.

1984-03-30T23:59:59.000Z

325

Cell design for lithium alloy/metal sulfide battery  

DOE Patents (OSTI)

The disclosed lithium alloy/iron sulfide cell design provides loop-like positive and negative sheet metal current collectors electrically insulated from one another by separator means, the positive collector being located outwardly of the negative collector. The collectors are initially secured within an open-ended cell housing, which allows for collector pretesting for electrical shorts prior to adding any electrode materials and/or electrolyte to the cell. Separate chambers are defined outwardly of the positive collector and inwardly of the negative collector open respectively in opposite directions toward the open ends of the cell housing; and positive and negative electrode materials can be extruded into these respective chambers via the opposite open housing ends. The chambers and cell housing ends can then be sealed closed. A cross wall structurally reinforces the cell housing and also thereby defines two cavities, and paired positive and negative collectors are disposed in each cavity and electrically connected in parallel. The cell design provides for a high specific energy output and improved operating life in that any charge-discharge cycle swelling of the positive electrode material will be inwardly against only the positive collector to minimize shorts caused by the collectors shifting relative to one another.

Kaun, Thomas D. (New Lennox, IL)

1985-01-01T23:59:59.000Z

326

The oceanic cycle and global atmospheric budget of carbonyl sulfide  

SciTech Connect

A significant portion of stratospheric air chemistry is influenced by the existence of carbonyl sulfide (COS). This ubiquitous sulfur gas represents a major source of sulfur to the stratosphere where it is converted to sulfuric acid aerosol particles. Stratospheric aerosols are climatically important because they scatter incoming solar radiation back to space and are able to increase the catalytic destruction of ozone through gas phase reactions on particle surfaces. COS is primarily formed at the surface of the earth, in both marine and terrestrial environments, and is strongly linked to natural biological processes. However, many gaps in the understanding of the global COS cycle still exist, which has led to a global atmospheric budget that is out of balance by a factor of two or more, and a lack of understanding of how human activity has affected the cycling of this gas. The goal of this study was to focus on COS in the marine environment by investigating production/destruction mechanisms and recalculating the ocean-atmosphere flux.

Weiss, P.S.

1994-12-31T23:59:59.000Z

327

Commercialization planning for the lithium/metal sulfide battery  

SciTech Connect

A federally supported battery development program has been underway at Argonne National laboratory since 1973 that is directed to the development and commercialization of high-energy batteries that meet national needs. This program has received a high national priority from the Energy Research Development Administration (and previously the Atomic Energy Commission) with appropriate R and D funding because achievement of the program goals is perceived as having a potentially important impact upon the energy resources in the U.S. The commercial production of high-energy-density batteries, if produced at costs that are attractive, can result in the reduction of petroleum consumption in applications such as utility peak-shaving or personal transportation. This would be accomplished by shifting these applications away from petroleum-fueled combustion turbines and internal combustion engines to battery peaking plants for utilities and battery-powered automobiles which can use electricity produced from energy sources such as coal or nuclear fuel. The energy storage that is projected for mature lithium/metal sulfide (Li/Ms) batteries is about 4 to 5 times that of today's lead--acid battery per unit weight and about 3 to 4 times per unit volume. Achievement of these performance goals and the cost goals for the cells of $20 to $35/kWh would make this system very attractive for many applications of commercial interest. 4 figures, 5 tables.

Chilenskas, A.A.

1977-01-01T23:59:59.000Z

328

Hydrogen Filling Station  

Science Conference Proceedings (OSTI)

Hydrogen is an environmentally attractive transportation fuel that has the potential to displace fossil fuels. The Freedom CAR and Freedom FUEL initiatives emphasize the importance of hydrogen as a future transportation fuel. Presently, Las Vegas has one hydrogen fueling station powered by natural gas. However, the use of traditional sources of energy to produce hydrogen does not maximize the benefit. The hydrogen fueling station developed under this grant used electrolysis units and solar energy to produce hydrogen fuel. Water and electricity are furnished to the unit and the output is hydrogen and oxygen. Three vehicles were converted to utilize the hydrogen produced at the station. The vehicles were all equipped with different types of technologies. The vehicles were used in the day-to-day operation of the Las Vegas Valley Water District and monitoring was performed on efficiency, reliability and maintenance requirements. The research and demonstration utilized for the reconfiguration of these vehicles could lead to new technologies in vehicle development that could make hydrogen-fueled vehicles more cost effective, economical, efficient and more widely used. In order to advance the development of a hydrogen future in Southern Nevada, project partners recognized a need to bring various entities involved in hydrogen development and deployment together as a means of sharing knowledge and eliminating duplication of efforts. A road-mapping session was held in Las Vegas in June 2006. The Nevada State Energy Office, representatives from DOE, DOE contractors and LANL, NETL, NREL were present. Leadership from the National hydrogen Association Board of Directors also attended. As a result of this session, a roadmap for hydrogen development was created. This roadmap has the ability to become a tool for use by other road-mapping efforts in the hydrogen community. It could also become a standard template for other states or even countries to approach planning for a hydrogen future. Project partners also conducted a workshop on hydrogen safety and permitting. This provided an opportunity for the various permitting agencies and end users to gather to share experiences and knowledge. As a result of this workshop, the permitting process for the hydrogen filling station on the Las Vegas Valley Water District’s land was done more efficiently and those who would be responsible for the operation were better educated on the safety and reliability of hydrogen production and storage. The lessons learned in permitting the filling station and conducting this workshop provided a basis for future hydrogen projects in the region. Continuing efforts to increase the working pressure of electrolysis and efficiency have been pursued. Research was also performed on improving the cost, efficiency and durability of Proton Exchange Membrane (PEM) hydrogen technology. Research elements focused upon PEM membranes, electrodes/catalysts, membrane-electrode assemblies, seals, bipolar plates, utilization of renewable power, reliability issues, scale, and advanced conversion topics. Additionally, direct solar-to-hydrogen conversion research to demonstrate stable and efficient photoelectrochemistry (PEC) hydrogen production systems based on a number of optional concepts was performed. Candidate PEC concepts included technical obstacles such as inefficient photocatalysis, inadequate photocurrent due to non-optimal material band gap energies, rapid electron-hole recombination, reduced hole mobility and diminished operational lifetimes of surface materials exposed to electrolytes. Project Objective 1: Design, build, operate hydrogen filling station Project Objective 2: Perform research and development for utilizing solar technologies on the hydrogen filling station and convert two utility vehicles for use by the station operators Project Objective 3: Increase capacity of hydrogen filling station; add additional vehicle; conduct safety workshop; develop a roadmap for hydrogen development; accelerate the development of photovoltaic components Project Objective 4:

Boehm, Robert F; Sabacky, Bruce; Anderson II, Everett B; Haberman, David; Al-Hassin, Mowafak; He, Xiaoming; Morriseau, Brian

2010-02-24T23:59:59.000Z

329

Hydrogen Filling Station  

SciTech Connect

Hydrogen is an environmentally attractive transportation fuel that has the potential to displace fossil fuels. The Freedom CAR and Freedom FUEL initiatives emphasize the importance of hydrogen as a future transportation fuel. Presently, Las Vegas has one hydrogen fueling station powered by natural gas. However, the use of traditional sources of energy to produce hydrogen does not maximize the benefit. The hydrogen fueling station developed under this grant used electrolysis units and solar energy to produce hydrogen fuel. Water and electricity are furnished to the unit and the output is hydrogen and oxygen. Three vehicles were converted to utilize the hydrogen produced at the station. The vehicles were all equipped with different types of technologies. The vehicles were used in the day-to-day operation of the Las Vegas Valley Water District and monitoring was performed on efficiency, reliability and maintenance requirements. The research and demonstration utilized for the reconfiguration of these vehicles could lead to new technologies in vehicle development that could make hydrogen-fueled vehicles more cost effective, economical, efficient and more widely used. In order to advance the development of a hydrogen future in Southern Nevada, project partners recognized a need to bring various entities involved in hydrogen development and deployment together as a means of sharing knowledge and eliminating duplication of efforts. A road-mapping session was held in Las Vegas in June 2006. The Nevada State Energy Office, representatives from DOE, DOE contractors and LANL, NETL, NREL were present. Leadership from the National hydrogen Association Board of Directors also attended. As a result of this session, a roadmap for hydrogen development was created. This roadmap has the ability to become a tool for use by other road-mapping efforts in the hydrogen community. It could also become a standard template for other states or even countries to approach planning for a hydrogen future. Project partners also conducted a workshop on hydrogen safety and permitting. This provided an opportunity for the various permitting agencies and end users to gather to share experiences and knowledge. As a result of this workshop, the permitting process for the hydrogen filling station on the Las Vegas Valley Water District’s land was done more efficiently and those who would be responsible for the operation were better educated on the safety and reliability of hydrogen production and storage. The lessons learned in permitting the filling station and conducting this workshop provided a basis for future hydrogen projects in the region. Continuing efforts to increase the working pressure of electrolysis and efficiency have been pursued. Research was also performed on improving the cost, efficiency and durability of Proton Exchange Membrane (PEM) hydrogen technology. Research elements focused upon PEM membranes, electrodes/catalysts, membrane-electrode assemblies, seals, bipolar plates, utilization of renewable power, reliability issues, scale, and advanced conversion topics. Additionally, direct solar-to-hydrogen conversion research to demonstrate stable and efficient photoelectrochemistry (PEC) hydrogen production systems based on a number of optional concepts was performed. Candidate PEC concepts included technical obstacles such as inefficient photocatalysis, inadequate photocurrent due to non-optimal material band gap energies, rapid electron-hole recombination, reduced hole mobility and diminished operational lifetimes of surface materials exposed to electrolytes. Project Objective 1: Design, build, operate hydrogen filling station Project Objective 2: Perform research and development for utilizing solar technologies on the hydrogen filling station and convert two utility vehicles for use by the station operators Project Objective 3: Increase capacity of hydrogen filling station; add additional vehicle; conduct safety workshop; develop a roadmap for hydrogen development; accelerate the development of photovoltaic components Project Objective 4:

Boehm, Robert F; Sabacky, Bruce; Anderson II, Everett B; Haberman, David; Al-Hassin, Mowafak; He, Xiaoming; Morriseau, Brian

2010-02-24T23:59:59.000Z

330

Ultrafine hydrogen storage powders  

DOE Patents (OSTI)

A method of making hydrogen storage powder resistant to fracture in service involves forming a melt having the appropriate composition for the hydrogen storage material, such, for example, LaNi.sub.5 and other AB.sub.5 type materials and AB.sub.5+x materials, where x is from about -2.5 to about +2.5, including x=0, and the melt is gas atomized under conditions of melt temperature and atomizing gas pressure to form generally spherical powder particles. The hydrogen storage powder exhibits improved chemcial homogeneity as a result of rapid solidfication from the melt and small particle size that is more resistant to microcracking during hydrogen absorption/desorption cycling. A hydrogen storage component, such as an electrode for a battery or electrochemical fuel cell, made from the gas atomized hydrogen storage material is resistant to hydrogen degradation upon hydrogen absorption/desorption that occurs for example, during charging/discharging of a battery. Such hydrogen storage components can be made by consolidating and optionally sintering the gas atomized hydrogen storage powder or alternately by shaping the gas atomized powder and a suitable binder to a desired configuration in a mold or die.

Anderson, Iver E. (Ames, IA); Ellis, Timothy W. (Doylestown, PA); Pecharsky, Vitalij K. (Ames, IA); Ting, Jason (Ames, IA); Terpstra, Robert (Ames, IA); Bowman, Robert C. (La Mesa, CA); Witham, Charles K. (Pasadena, CA); Fultz, Brent T. (Pasadena, CA); Bugga, Ratnakumar V. (Arcadia, CA)

2000-06-13T23:59:59.000Z

331

Hydrogen Separation Membranes for Vision 21 Fossil Fuel Plants  

DOE Green Energy (OSTI)

Eltron Research and team members CoorsTek, McDermott Technology, Sued Chemie, Argonne National Laboratory, and Oak Ridge National Laboratory are developing an environmentally benign, inexpensive, and efficient method for separating hydrogen from gas mixtures produced during industrial processes, such as coal gasification. This objective is being pursued using dense membranes based in part on Eltron-patented ceramic materials with a demonstrated ability for proton and electron conduction. The technical goals are being addressed by modifying single-phase and composite membrane composition and microstructure to maximize proton and electron conductivity without loss of material stability. Ultimately, these materials must enable hydrogen separation at practical rates under ambient and high-pressure conditions, without deactivation in the presence of feedstream components such as carbon dioxide, water, and sulfur. This project was motivated by the Department of Energy (DOE) National Energy Technology Laboratory (NETL) Vision 21 initiative which seeks to economically eliminate environmental concerns associated with the use of fossil fuels. The proposed technology addresses the DOE Vision 21 initiative in two ways. First, this process offers a relatively inexpensive solution for pure hydrogen separation that can be easily incorporated into Vision 21 fossil fuel plants. Second, this process could reduce the cost of hydrogen, which is a clean burning fuel under increasing demand as supporting technologies are developed for hydrogen utilization and storage. Additional motivation for this project arises from the potential of this technology for other applications. By appropriately changing the catalysts coupled with the membrane, essentially the same system can be used to facilitate alkane dehydrogenation and coupling, aromatics processing, and hydrogen sulfide decomposition.

Roark, Shane E.; Mackay, Richard; Sammells, Anthony F.

2001-11-06T23:59:59.000Z

332

Analysis of hydrogen isotope mixtures  

DOE Patents (OSTI)

Disclosed are an apparatus and a method for determining concentrations of hydrogen isotopes in a sample. Hydrogen in the sample is separated from other elements using a filter selectively permeable to hydrogen. Then the hydrogen is condensed onto a cold finger or cryopump. The cold finger is rotated as pulsed laser energy vaporizes a portion of the condensed hydrogen, forming a packet of molecular hydrogen. The desorbed hydrogen is ionized and admitted into a mass spectrometer for analysis.

Villa-Aleman, E.

1992-12-31T23:59:59.000Z

333

Analysis of hydrogen isotope mixtures  

DOE Patents (OSTI)

An apparatus and method for determining the concentrations of hydrogen isotopes in a sample. Hydrogen in the sample is separated from other elements using a filter selectively permeable to hydrogen. Then the hydrogen is condensed onto a cold finger or cryopump. The cold finger is rotated as pulsed laser energy vaporizes a portion of the condensed hydrogen, forming a packet of molecular hydrogen. The desorbed hydrogen is ionized and admitted into a mass spectrometer for analysis.

Villa-Aleman, Eliel (Aiken, SC)

1994-01-01T23:59:59.000Z

334

Hydrogen Codes and Standards  

NLE Websites -- All DOE Office Websites (Extended Search)

Codes and Standards Codes and Standards James Ohi National Renewable Energy Laboratory 1617 Cole Blvd. Golden, CO 80401 Background The development and promulgation of codes and standards are essential if hydrogen is to become a significant energy carrier and fuel because codes and standards are critical to establishing a market-receptive environment for commercializing hydrogen-based products and systems. The Hydrogen, Fuel Cells, and Infrastructure Technologies Program of the U.S. Department of Energy (DOE) and the National Renewable Energy Laboratory (NREL), with the help of the National Hydrogen Association (NHA) and other key stakeholders, are coordinating a collaborative national effort by government and industry to prepare, review, and promulgate hydrogen codes and standards needed to expedite hydrogen infrastructure development. The

335

President's Hydrogen Fuel Initiative  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Fuel Initiative Hydrogen Fuel Initiative Workshop on Manufacturing R&D for the Hydrogen Economy Washington, DC July 13, 2005 JoAnn Milliken DOE Hydrogen Program Planning U.S. Energy Dependence is Driven By Transportation * The U.S. imports 55% of its oil; expected to grow to 68% by 2025 under the status quo. * Transportation accounts for 2/3 of the 20 million barrels of oil our nation uses each day. * Gasoline hybrid electric vehicles will help in the near -mid term; a replacement for petroleum is needed for the long-term. 0 2 4 6 8 10 12 14 16 18 20 22 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 Million barrels per day Marine Rail Actual Projection Cars Air Light Trucks Heavy Vehicles U.S. Production Off-Road Projection Hydrogen Provides a Solution Producing hydrogen from domestic resources, including renewable, nuclear, and coal

336

Hydrogen Based Bacteria  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Based Bacteria Hydrogen Based Bacteria Name: Ellen Location: N/A Country: N/A Date: N/A Question: i was in my Biology class and a very respectable someone mentioned something about the discovery of a hydrogen based bacteria. my teacher wasnt aware of this study, and assigned me to find out about it. so i thought i would Email you and see if you people knew anything about it. Awaiting your repsonse Replies: I'm not quite sure what you mean by hydrogen based bacteria but I will take a stab that you mean bacteria that use hydrogen for energy. Some bacteria are chemolithotrophs which mean that they are autrophs but don't use the sun as their energy source; they get their energy from chemical sources. There are bacteria that use hydrogen as their energy source. They are diverse as a group and are all facultative. The overall chemical reaction looks like this:

337

Hydrogenation of carbonaceous materials  

DOE Patents (OSTI)

A method for reacting pulverized coal with heated hydrogen-rich gas to form hydrocarbon liquids suitable for conversion to fuels wherein the reaction involves injection of pulverized coal entrained in a minimum amount of gas and mixing the entrained coal at ambient temperature with a separate source of heated hydrogen. In accordance with the present invention, the hydrogen is heated by reacting a small portion of the hydrogen-rich gas with oxygen in a first reaction zone to form a gas stream having a temperature in excess of about 1000.degree. C. and comprising a major amount of hydrogen and a minor amount of water vapor. The coal particles then are reacted with the hydrogen in a second reaction zone downstream of the first reaction zone. The products of reaction may be rapidly quenched as they exit the second reaction zone and are subsequently collected.

Friedman, Joseph (Encino, CA); Oberg, Carl L. (Canoga Park, CA); Russell, Larry H. (Agoura, CA)

1980-01-01T23:59:59.000Z

338

Hydrogen Permeation Resistant Coatings  

DOE Green Energy (OSTI)

As the National Hydrogen Economy continues to develop and evolve the need for structural materials that can resist hydrogen assisted degradation will become critical. To date austenitic stainless steel materials have been shown to be mildly susceptible to hydrogen attack which results in lower mechanical and fracture strengths. As a result, hydrogen permeation barrier coatings may be applied to these ferrous alloys to retard hydrogen ingress. Hydrogen is known to be very mobile in materials of construction. In this study, the permeation resistance of bare stainless steel samples and coated stainless steel samples was tested. The permeation resistance was measured using a modular permeation rig using a pressure rise technique. The coating microstructure and permeation results will be discussed in this document as will some additional testing.

KORINKO, PAUL; ADAMS, THAD; CREECH, GREGGORY

2005-06-15T23:59:59.000Z

339

HYDROGEN ISOTOPE TARGETS  

DOE Patents (OSTI)

The design of targets for use in the investigation of nuclear reactions of hydrogen isotopes by bombardment with accelerated particles is described. The target con struction eomprises a backing disc of a metal selected from the group consisting of molybdenunn and tungsten, a eoating of condensed titaniunn on the dise, and a hydrogen isotope selected from the group consisting of deuterium and tritium absorbed in the coatiag. The proeess for preparing these hydrogen isotope targets is described.

Ashley, R.W.

1958-08-12T23:59:59.000Z

340

Hydrogen and Fuel Cells R&D  

NLE Websites -- All DOE Office Websites (Extended Search)

Liquids --Hydrogen Storage Materials --Hydrogen Storage Systems Modeling and Analysis --Thermochemical Hydrogen * Fuel Cells --Polymer Electrolyte --Modeling & Analysis --Fuel...

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

California Hydrogen Infrastructure Project | Open Energy Information  

Open Energy Info (EERE)

Hydrogen Infrastructure Project Jump to: navigation, search Name California Hydrogen Infrastructure Project Place California Sector Hydro, Hydrogen Product String representation...

342

Hydrogen Compatibility of Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Compatibility of Materials Compatibility of Materials August 13, 2013 DOE EERE Fuel Cell Technologies Office Webinar Chris San Marchi Sandia National Laboratories Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000 SAND2013-6278P 2 Webinar Objectives * Provide context for hydrogen embrittlement and hydrogen compatibility of materials - Distinguish embrittlement, compatibility and suitability - Examples of hydrogen embrittlement * Historical perspective - Previous work on hydrogen compatibility - Motivation of "Materials Guide" * Identify the landscape of materials compatibility documents

343

Hydrogen Generation by Electrolysis  

NLE Websites -- All DOE Office Websites (Extended Search)

Better Engineered Solutions. Better Engineered Solutions. What Listening Generates. Better Engineered Solutions. What Listening Generates. Hydrogen Generation by Electrolysis September 2004 Steve Cohen Hydrogen Generation by Electrolysis September 2004 Steve Cohen NREL H 2 Electrolysis - Utility Integration Workshop NREL H 2 Electrolysis - Utility Integration Workshop 2 Hydrogen Generation by Electrolysis Hydrogen Generation by Electrolysis  Intro to Teledyne Energy Systems  H 2 Generator Basics & Major Subsystems  H 2 Generating & Storage System Overview  Electrolysis System Efficiency & Economics  Focus for Attaining DOE H 2 Production Cost Goals 3 Teledyne Energy Systems Locations - ISO 9001 Teledyne Energy Systems Locations - ISO 9001 Hunt Valley, Maryland  State-of-the-art thermoelectric,

344

OpenEI - hydrogen  

Open Energy Info (EERE)

biodiesel CNG compressed natural gas E85 Electricity ethanol hydrogen liquefied natural gas LNG liquefied petroleum gas LPG propane station locations Tue, 14 Dec 2010...

345

Thin film hydrogen sensor  

DOE Green Energy (OSTI)

A hydrogen sensor element comprises an essentially inert, electrically-insulating substrate having a thin-film metallization deposited thereon which forms at least two resistors on the substrate. The metallization comprises a layer of Pd or a Pd alloy for sensing hydrogen and an underlying intermediate metal layer for providing enhanced adhesion of the metallization to the substrate. An essentially inert, electrically insulating, hydrogen impermeable passivation layer covers at least one of the resistors, and at least one of the resistors is left uncovered. The difference in electrical resistances of the covered resistor and the uncovered resistor is related to hydrogen concentration in a gas to which the sensor element is exposed.

Lauf, Robert J. (Oak Ridge, TN); Hoffheins, Barbara S. (Knoxville, TN); Fleming, Pamela H. (Oak Ridge, TN)

1994-01-01T23:59:59.000Z

346

Hydrogen production from biomass .  

E-Print Network (OSTI)

??Biomass energy encompasses a broad category of energy derived from plants and animals as well as the residual materials from each. Hydrogen gas is an… (more)

Hahn, John J.

2006-01-01T23:59:59.000Z

347

Enabling the Hydrogen Economy  

Science Conference Proceedings (OSTI)

... Act of 2002 to develop research and standards for gas pipeline integrity, safety ... for materials used in hydrogen systems (eg, pipelines) developed in ...

2010-10-05T23:59:59.000Z

348

FCT Hydrogen Delivery: Basics  

NLE Websites -- All DOE Office Websites (Extended Search)

distributed production facilities have relatively low delivery costs, but the hydrogen production costs are likely to be higher-lower volume production means higher equipment...

349

Hydrogen Compatibility of Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

materials data related to hydrogen embrittlement - Modeled after existing metals handbooks - Data culled from open literature * Peer-reviewed scientific articles * Public...

350

Hydrogen MOS Quality Boulder  

Science Conference Proceedings (OSTI)

... b. The recommendations of the FSS based on its December 2008 review of the proposed method of sale for hydrogen engine fuel are: ...

2011-10-24T23:59:59.000Z

351

Initiators of coal hydrogenation  

Science Conference Proceedings (OSTI)

The results are given of an investigation of the influence of additions of certain organosilicon compounds of cyclic and linear nature on the coal hydrogenation process.

Krichko, A.A.; Dembovskaya, E.A.; Gorlov, E.G.

1983-01-01T23:59:59.000Z

352

The Transition to Hydrogen  

E-Print Network (OSTI)

optimistic hydrogen-demand scenarios, natural gas use woulddemand Model President’s H 2 initiative (100% of ?eet) (50% of ?eet) (21% of ?eet) Natural gas

Ogden, Joan

2005-01-01T23:59:59.000Z

353

Hydrogen Compatible Materials Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

Workshop November 3 rd , 2010 Research, Engineering, and Applications Center for Hydrogen Sandia National Laboratory, Livermore, CA Introduction: On November 3 rd , 2010, Sandia...

354

Optimized hydrogen piston engines  

DOE Green Energy (OSTI)

Hydrogen piston engines can be simultaneously optimized for improved thermal efficiency and for extremely low emissions. Using these engines in constant-speed, constant-load systems such as series hybrid-electric automobiles or home cogeneration systems can result in significantly improved energy efficiency. For the same electrical energy produced, the emissions from such engines can be comparable to those from natural gas-fired steam power plants. These hydrogen-fueled high-efficiency, low-emission (HELE) engines are a mechanical equivalent of hydrogen fuel cells. HELE engines could facilitate the transition to a hydrogen fuel cell economy using near-term technology.

Smith, J.R.

1994-05-10T23:59:59.000Z

355

Renewable Hydrogen (Presentation)  

DOE Green Energy (OSTI)

Presentation about the United State's dependence on oil, how energy solutions are challenging, and why hydrogen should be considered as a long-term alternative for transportation fuel.

Remick, R. J.

2009-11-16T23:59:59.000Z

356

Hydrogen Fuel Cells  

Fuel Cell Technologies Publication and Product Library (EERE)

The fuel cell — an energy conversion device that can efficiently capture and use the power of hydrogen — is the key to making it happen.

357

Hydrogen Safety Knowledge Tools  

Science Conference Proceedings (OSTI)

With hydrogen gaining acceptance as an energy carrier for fuel cell vehicles and stationary fuel cell applications, a new community of hydrogen users is emerging and continues to grow. With this growth has come the need to spread the word about safe practices for handling, storing, and using hydrogen. Like all energy forms, hydrogen can be used safely through proper procedures and engineering techniques. However, hydrogen involves a degree of risk that must be respected, and the importance of avoiding complacency or haste in the safe conduct and performance of projects involving hydrogen cannot be overstated. To encourage and promote the safe use of hydrogen, Pacific Northwest National Laboratory (PNNL) has developed and continues to enhance two software tools in support of the U.S. Department of Energy's Fuel Cell Technologies Program: the Hydrogen Safety Best Practices online manual (www.H2BestPractices.org) and the Hydrogen Incident Reporting and Lessons Learned database (www.H2Incidents.org).

Fassbender, Linda L.

2011-01-31T23:59:59.000Z

358

Hydrogen permeation resistant barrier  

DOE Patents (OSTI)

A hydrogen permeation resistant barrier is formed by diffusing aluminum into an iron or nickel alloy and forming an intermetallic aluminide layer.

McGuire, Joseph C. (Richland, WA); Brehm, William F. (Richland, WA)

1982-01-01T23:59:59.000Z

359

The Transition to Hydrogen  

E-Print Network (OSTI)

energy costs, energy alternatives, and the role of hydrogenenergy in profound ways. But hydrogen also poses the greatest challenges of any alternative

Ogden, Joan M

2005-01-01T23:59:59.000Z

360

Sustainable hydrogen production  

SciTech Connect

This report describes the Sustainable Hydrogen Production research conducted at the Florida Solar Energy Center (FSEC) for the past year. The report presents the work done on the following four tasks: Task 1--production of hydrogen by photovoltaic-powered electrolysis; Task 2--solar photocatalytic hydrogen production from water using a dual-bed photosystem; Task 3--development of solid electrolytes for water electrolysis at intermediate temperatures; and Task 4--production of hydrogen by thermocatalytic cracking of natural gas. For each task, this report presents a summary, introduction/description of project, and results.

Block, D.L.; Linkous, C.; Muradov, N.

1996-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

Hydrogen permeation resistant barrier  

DOE Patents (OSTI)

A hydrogen permeation resistant barrier is formed by diffusing aluminum into an iron or nickel alloy and forming an intermetallic aluminide layer.

McGuire, J.C.; Brehm, W.F.

1980-02-08T23:59:59.000Z

362

Alternative Fuels Data Center: Hydrogen  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Hydrogen Hydrogen Printable Version Share this resource Send a link to Alternative Fuels Data Center: Hydrogen to someone by E-mail Share Alternative Fuels Data Center: Hydrogen on Facebook Tweet about Alternative Fuels Data Center: Hydrogen on Twitter Bookmark Alternative Fuels Data Center: Hydrogen on Google Bookmark Alternative Fuels Data Center: Hydrogen on Delicious Rank Alternative Fuels Data Center: Hydrogen on Digg Find More places to share Alternative Fuels Data Center: Hydrogen on AddThis.com... More in this section... Hydrogen Basics Benefits & Considerations Stations Vehicles Laws & Incentives Hydrogen Hydrogen is a potentially emissions-free alternative fuel that can be produced from diverse domestic energy sources. Research is under way to make hydrogen vehicles practical for widespread use.

363

FCT Hydrogen Production: Current Technology  

NLE Websites -- All DOE Office Websites (Extended Search)

Current Technology to Current Technology to someone by E-mail Share FCT Hydrogen Production: Current Technology on Facebook Tweet about FCT Hydrogen Production: Current Technology on Twitter Bookmark FCT Hydrogen Production: Current Technology on Google Bookmark FCT Hydrogen Production: Current Technology on Delicious Rank FCT Hydrogen Production: Current Technology on Digg Find More places to share FCT Hydrogen Production: Current Technology on AddThis.com... Home Basics Current Technology Thermal Processes Electrolytic Processes Photolytic Processes R&D Activities Quick Links Hydrogen Delivery Hydrogen Storage Fuel Cells Technology Validation Manufacturing Codes & Standards Education Systems Analysis Contacts Current Technology The development of clean, sustainable, and cost-competitive hydrogen

364

Triboluminescent properties of zinc sulfide phosphors due to hypervelocity impact  

SciTech Connect

The emission of light due to crystal fracture, or triboluminescence (TL), is a phenomenon that has been known for centuries. One of the most common examples of TL is the flash created from chewing Wint-O-Green Lifesavers . From 2004 to 2006, research was completed using the two-stage light gas gun located at the NASA Marshall Space Flight Center (MSFC) in Huntsville, Alabama to measure the TL properties for zinc sulfide doped with both manganese (ZnS:Mn) and copper (ZnS:Cu). Results clearly show that hypervelocity impact-induced TL has been observed for both ZnS:Mn and ZnS:Cu. For ZnS:Mn, TL produced during 4.7 and 5.7km/s impacts was statistically more luminous than was observed from similar data collected at 3.3km/s. The TL decay time for ZnS:Mn was found to be 292 58 s, which is totally consistent with earlier measurements that did not use impact as an excitation source. Further, the emission of TL from ZnS:Mn undergoing hypervelocity impact has been demonstrated to have a significant component at the known peak emission wavelength of ZnS:Mn of 585nm. Small TL emission generated as a result of hypervelocity impact was also observed from ZnS:Cu. The most intriguing conclusion from this research is that it may be possible to discriminate impact velocity by measuring the time-integrated luminosity of TL phosphors. An ability to measure the velocity of a hypervelocity impact is a significant indicator of the potential usefulness for this concept for use as an impact sensor in future spacecraft.

Bergeron, Mr. Noah P. [Louisiana Tech University; HollermanPh.D., Dr. William A. [University of Louisiana, Lafayette; Goedeke, Shawn [ORNL; Moore, R. J. [University of Louisiana, Lafayette

2008-01-01T23:59:59.000Z

365

Hydrogen Refueling Station Costs in Shanghai  

E-Print Network (OSTI)

E. Hydrogen Supply: Cost Estimate for Hydrogen Pathways -costs are compared with cost estimates of similar stationsHydrogen Supply: Cost Estimate for Hydrogen Pathways-Scoping

Weinert, Jonathan X.; Shaojun, Liu; Ogden, J; Jianxin, Ma

2006-01-01T23:59:59.000Z

366

Hydrogen Car Co | Open Energy Information  

Open Energy Info (EERE)

navigation, search Name Hydrogen Car Co Place Los Angeles, California Zip 90036 Sector Hydro, Hydrogen Product The Hydrogen Car Company produces hydrogen internal combustion...

367

An Integrated Hydrogen Vision for California  

E-Print Network (OSTI)

An Integrated Hydrogen Vision for California White Paper/High Efficiency Generation Of Hydrogen Fuels Using NuclearU.S. Department of Energy Hydrogen Fuel Cells and Hydrogen

2004-01-01T23:59:59.000Z

368

Hydrogen refueling station costs in Shanghai  

E-Print Network (OSTI)

of Hydrogen Energy 32 (2007) 4089 – 4100 Table 4 Storage andHydrogen Energy 32 (2007) 4089 – 4100 Hydrogen tube-trailer Compressed hydrogen storage

Weinert, Jonathan X.; Shaojun, Liu; Ogden, Joan M; Jianxin, Ma

2007-01-01T23:59:59.000Z

369

Combination moisture and hydrogen getter  

DOE Patents (OSTI)

A combination moisture and hydrogen getter comprises (a) a moisture getter comprising a readily oxidizable metal; and (b) a hydrogen getter comprising (i) a solid acetylenic compound and (ii) a hydrogenation catalyst. A method of scavenging moisture from a closed container uses the combination moisture and hydrogen getter to irreversibly chemically reduce the moisture and chemically bind the resultant hydrogen.

Harrah, Larry A. (Albuquerque, NM); Mead, Keith E. (Peralta, NM); Smith, Henry M. (Overland Park, KS)

1983-01-01T23:59:59.000Z

370

Enhancing hydrogen spillover and storage  

DOE Patents (OSTI)

Methods for enhancing hydrogen spillover and storage are disclosed. One embodiment of the method includes doping a hydrogen receptor with metal particles, and exposing the hydrogen receptor to ultrasonification as doping occurs. Another embodiment of the method includes doping a hydrogen receptor with metal particles, and exposing the doped hydrogen receptor to a plasma treatment.

Yang, Ralph T. (Ann Arbor, MI); Li, Yingwel (Ann Arbor, MI); Lachawiec, Jr., Anthony J. (Ann Arbor, MI)

2011-05-31T23:59:59.000Z

371

Enhancing hydrogen spillover and storage  

DOE Patents (OSTI)

Methods for enhancing hydrogen spillover and storage are disclosed. One embodiment of the method includes doping a hydrogen receptor with metal particles, and exposing the hydrogen receptor to ultrasonication as doping occurs. Another embodiment of the method includes doping a hydrogen receptor with metal particles, and exposing the doped hydrogen receptor to a plasma treatment.

Yang, Ralph T; Li, Yingwei; Lachawiec, Jr., Anthony J

2013-02-12T23:59:59.000Z

372

Florida Hydrogen Initiative  

SciTech Connect

The Florida Hydrogen Initiative (FHI) was a research, development and demonstration hydrogen and fuel cell program. The FHI program objectives were to develop Florida?s hydrogen and fuel cell infrastructure and to assist DOE in its hydrogen and fuel cell activities The FHI program funded 12 RD&D projects as follows: Hydrogen Refueling Infrastructure and Rental Car Strategies -- L. Lines, Rollins College This project analyzes strategies for Florida's early stage adaptation of hydrogen-powered public transportation. In particular, the report investigates urban and statewide network of refueling stations and the feasibility of establishing a hydrogen rental-car fleet based in Orlando. Methanol Fuel Cell Vehicle Charging Station at Florida Atlantic University ? M. Fuchs, EnerFuel, Inc. The project objectives were to design, and demonstrate a 10 kWnet proton exchange membrane fuel cell stationary power plant operating on methanol, to achieve an electrical energy efficiency of 32% and to demonstrate transient response time of less than 3 milliseconds. Assessment of Public Understanding of the Hydrogen Economy Through Science Center Exhibits, J. Newman, Orlando Science Center The project objective was to design and build an interactive Science Center exhibit called: ?H2Now: the Great Hydrogen Xchange?. On-site Reformation of Diesel Fuel for Hydrogen Fueling Station Applications ? A. Raissi, Florida Solar Energy Center This project developed an on-demand forecourt hydrogen production technology by catalytically converting high-sulfur hydrocarbon fuels to an essentially sulfur-free gas. The removal of sulfur from reformate is critical since most catalysts used for the steam reformation have limited sulfur tolerance. Chemochromic Hydrogen Leak Detectors for Safety Monitoring ? N. Mohajeri and N. Muradov, Florida Solar Energy Center This project developed and demonstrated a cost-effective and highly selective chemochromic (visual) hydrogen leak detector for safety monitoring at any facility engaged in transport, handling and use of hydrogen. Development of High Efficiency Low Cost Electrocatalysts for Hydrogen Production and PEM Fuel Cell Applications ? M. Rodgers, Florida Solar Energy Center The objective of this project was to decrease platinum usage in fuel cells by conducting experiments to improve catalyst activity while lowering platinum loading through pulse electrodeposition. Optimum values of several variables during electrodeposition were selected to achieve the highest electrode performance, which was related to catalyst morphology. Understanding Mechanical and Chemical Durability of Fuel Cell Membrane Electrode Assemblies ? D. Slattery, Florida Solar Energy Center The objective of this project was to increase the knowledge base of the degradation mechanisms for membranes used in proton exchange membrane fuel cells. The results show the addition of ceria (cerium oxide) has given durability improvements by reducing fluoride emissions by an order of magnitude during an accelerated durability test. Production of Low-Cost Hydrogen from Biowaste (HyBrTec?) ? R. Parker, SRT Group, Inc., Miami, FL This project developed a hydrogen bromide (HyBrTec?) process which produces hydrogen bromide from wet-cellulosic waste and co-produces carbon dioxide. Eelectrolysis dissociates hydrogen bromide producing recyclable bromine and hydrogen. A demonstration reactor and electrolysis vessel was designed, built and operated. Development of a Low-Cost and High-Efficiency 500 W Portable PEMFC System ? J. Zheng, Florida State University, H. Chen, Bing Energy, Inc. The objectives of this project were to develop a new catalyst structures comprised of highly conductive buckypaper and Pt catalyst nanoparticles coated on its surface and to demonstrate fuel cell efficiency improvement and durability and cell cost reductions in the buckypaper based electrodes. Development of an Interdisciplinary Hydrogen and Fuel Cell Technology Academic Program ? J. Politano, Florida Institute of Technology, Melbourne, FL This project developed a hydrogen and fuel cel

Block, David L

2013-06-30T23:59:59.000Z

373

DOE Hydrogen and Fuel Cells Program: Hydrogen Production  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Production Hydrogen Production Hydrogen Delivery Hydrogen Storage Hydrogen Manufacturing Fuel Cells Applications/Technology Validation Safety Codes and Standards Education Basic Research Systems Analysis Systems Integration U.S. Department of Energy Search help Home > Hydrogen Production Printable Version Hydrogen Production Hydrogen can be produced from diverse domestic feedstocks using a variety of process technologies. Hydrogen-containing compounds such as fossil fuels, biomass or even water can be a source of hydrogen. Thermochemical processes can be used to produce hydrogen from biomass and from fossil fuels such as coal, natural gas and petroleum. Power generated from sunlight, wind and nuclear sources can be used to produce hydrogen electrolytically. Sunlight alone can also drive photolytic production of

374

Ovonic Hydrogen Systems LLC formerly Texaco Ovonic Hydrogen Systems LLC |  

Open Energy Info (EERE)

Hydrogen Systems LLC formerly Texaco Ovonic Hydrogen Systems LLC Hydrogen Systems LLC formerly Texaco Ovonic Hydrogen Systems LLC Jump to: navigation, search Name Ovonic Hydrogen Systems LLC (formerly Texaco Ovonic Hydrogen Systems LLC) Place Rochester Hills, Michigan Zip 48309 Sector Hydro, Hydrogen, Vehicles Product It commercializes hydrogen storage technology based on metal-hydrides for portable and stationary power systems as well as fuel-cell vehicles. References Ovonic Hydrogen Systems LLC (formerly Texaco Ovonic Hydrogen Systems LLC)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Ovonic Hydrogen Systems LLC (formerly Texaco Ovonic Hydrogen Systems LLC) is a company located in Rochester Hills, Michigan . References

375

Process for exchanging hydrogen isotopes between gaseous hydrogen and water  

DOE Patents (OSTI)

A process for exchanging isotopes of hydrogen, particularly tritium, between gaseous hydrogen and water is provided whereby gaseous hydrogen depeleted in tritium and liquid or gaseous water containing tritium are reacted in the presence of a metallic catalyst.

Hindin, Saul G. (Mendham, NJ); Roberts, George W. (Westfield, NJ)

1980-08-12T23:59:59.000Z

376

Thick film hydrogen sensor  

DOE Green Energy (OSTI)

A thick film hydrogen sensor element includes an essentially inert, electrically-insulating substrate having deposited thereon a thick film metallization forming at least two resistors. The metallization is a sintered composition of Pd and a sinterable binder such as glass frit. An essentially inert, electrically insulating, hydrogen impermeable passivation layer covers at least one of the resistors.

Hoffheins, Barbara S. (Knoxville, TN); Lauf, Robert J. (Oak Ridge, TN)

1995-01-01T23:59:59.000Z

377

NATIONAL HYDROGEN ENERGY ROADMAP  

E-Print Network (OSTI)

and replaced by coal gasification with carbon sequestration and, to a lesser extent, by biomass gasification. By 2050, biomass and wind, combined, provide 35% of hydrogen supplies. Hydrogen production from nuclear.energy.gov/hydrogenandfuelcells/posture_plan04.html. sequestration sites opt for more coal gasification while those with ample wind or biomass

378

Hydrogen Conference: Workshop Proceedings  

Science Conference Proceedings (OSTI)

Hydrogen is currently a major chemical/fuel with long-term energy system benefits that may impact the industry's physical and economic well-being. EPRI's recent hydrogen conference concluded that to be competitive, the production cost must take into account environmental and end-use efficiency benefits.

1989-10-20T23:59:59.000Z

379

Hydrogen Fuel Cell Engines  

E-Print Network (OSTI)

#12;#12;Hydrogen Fuel Cell Engines MODULE 11:GLOSSARY AND CONVERSIONS CONTENTS 11.1 GLOSSARY Cell Engines MODULE 11:GLOSSARY AND CONVERSIONS OBJECTIVES This module is for reference only. Hydrogen MODULE 11: GLOSSARY AND CONVERSIONS PAGE 11-1 11.1 Glossary This glossary covers words, phrases

380

DOE Hydrogen Analysis Repository: Transition to Hydrogen Transportation  

NLE Websites -- All DOE Office Websites (Extended Search)

Transition to Hydrogen Transportation Fuel Transition to Hydrogen Transportation Fuel Project Summary Full Title: A Smooth Transition to Hydrogen Transportation Fuel Project ID: 87 Principal Investigator: Gene Berry Brief Description: This project contrasts the options of decentralized production using the existing energy distribution network, and centralized production of hydrogen with a large-scale infrastructure. Keywords: Infrastructure; costs; hydrogen production Purpose The case for hydrogen-powered transportation requires an assessment of present and prospective methods for producing, storing, and delivering hydrogen. This project examines one potential pathway: on-site production of hydrogen to fuel light-duty vehicles. Performer Principal Investigator: Gene Berry Organization: Lawrence Livermore National Laboratory (LLNL)

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

NREL: Hydrogen and Fuel Cells Research - Hydrogen Production and Delivery  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Production and Delivery Hydrogen Production and Delivery Most of the hydrogen in the United States is produced by steam reforming of natural gas. For the near term, this production method will continue to dominate. Researchers at NREL are developing advanced processes to produce hydrogen economically from sustainable resources. NREL's hydrogen production and delivery R&D efforts, which are led by Huyen Dinh, focus on the following topics: Biological Water Splitting Fermentation Conversion of Biomass and Wastes Photoelectrochemical Water Splitting Solar Thermal Water Splitting Renewable Electrolysis Hydrogen Dispenser Hose Reliability Hydrogen Production and Delivery Pathway Analysis. Biological Water Splitting Certain photosynthetic microbes use light energy to produce hydrogen from

382

DOE Hydrogen Analysis Repository: Impact of Hydrogen Production...  

NLE Websites -- All DOE Office Websites (Extended Search)

U.S. Energy Markets Project ID: 99 Principal Investigator: Harry Vidas Keywords: Hydrogen production; hydrogen supply; infrastructure; costs Purpose This project addresses the...

383

Controlled Hydrogen Fleet and Infrastructure Analysis - DOE Hydrogen...  

NLE Websites -- All DOE Office Websites (Extended Search)

conditions, using multiple sites, varying climates, and a variety of hydrogen sources. Analyze detailed fuel cell and hydrogen data from * vehicles and infrastructure to...

384

DOE Hydrogen Analysis Repository: Production of Hydrogen byPhotovolta...  

NLE Websites -- All DOE Office Websites (Extended Search)

Electrolysis Project ID: 132 Principal Investigator: DL Block Purpose Compare the cost of hydrogen produced using photo electric chemical systems to the cost of hydrogen...

385

Hydrogen Fuel Pilot Plant and Hydrogen ICE Vehicle Testing  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Pilot Plant and Hydrogen ICE Vehicle Testing Jim Francfort (INEEL) Don Karner (ETA) 2004 Fuel Cell Seminar - San Antonio Session 5B - Hydrogen DOE - Advanced Vehicle Testing...

386

Hydrogen Embrittlement in Vanadium-based Hydrogen Separation ...  

Science Conference Proceedings (OSTI)

One of the important materials that face a challenge to overcome the hydrogen embrittlement is vanadium-based hydrogen separation membranes for an ...

387

NREL: Hydrogen and Fuel Cells Research - Hydrogen Storage  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Storage Storing hydrogen for renewable energy technologies can be challenging, especially for intermittent resources such as solar and wind. Whether for stationary,...

388

DOE Hydrogen Analysis Repository: The Hydrogen Economy: Opportunities...  

NLE Websites -- All DOE Office Websites (Extended Search)

for the potential penetration of hydrogen into the economy and associated impacts on oil imports and CO2 gas emissions; Address the problem of how hydrogen might be...

389

DOE Hydrogen Analysis Repository: Hydrogen from Renewable Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen from Renewable Energy Project Summary Full Title: H2 Production Infrastructure Analysis - Task 3: Hydrogen From Renewable Energy Sources: Pathway to 10 Quads for...

390

DOE Hydrogen Program Record 5030: Hydrogen Baseline Cost  

NLE Websites -- All DOE Office Websites (Extended Search)

kg of hydrogen) .56 Production unit energy efficiency 70% Compression electricity consumption (kWhrkg of hydrogen) 2.9 Total system energy efficiency 65% Feedstock and Utility...

391

NMR Studies of Molecular Hydrogen in Hydrogenated Amorphous Silicon  

DOE Green Energy (OSTI)

Using NMR, the concentrations of molecular hydrogen have been measured directly in hydrogenated amorphous silicon made by the hot wire chemical vapor deposition (HWCVD) technique.

Su, T.; Chen, S.; Taylor, P. C.; Crandall, R. S.; Mahan, A. H.

2000-01-01T23:59:59.000Z

392

Hydrogen Resource Assessment: Hydrogen Potential from Coal, Natural...  

NLE Websites -- All DOE Office Websites (Extended Search)

2009 Hydrogen Resource Assessment Hydrogen Potential from Coal, Natural Gas, Nuclear, and Hydro Power Anelia Milbrandt and Margaret Mann National Renewable Energy Laboratory 1617...

393

FCT Hydrogen Storage: Current Technology  

NLE Websites -- All DOE Office Websites (Extended Search)

Current Technology to someone Current Technology to someone by E-mail Share FCT Hydrogen Storage: Current Technology on Facebook Tweet about FCT Hydrogen Storage: Current Technology on Twitter Bookmark FCT Hydrogen Storage: Current Technology on Google Bookmark FCT Hydrogen Storage: Current Technology on Delicious Rank FCT Hydrogen Storage: Current Technology on Digg Find More places to share FCT Hydrogen Storage: Current Technology on AddThis.com... Home Basics Current Technology Gaseous and Liquid Hydrogen Storage Materials-Based Hydrogen Storage Hydrogen Storage Challenges Status of Hydrogen Storage Technologies DOE R&D Activities Quick Links Hydrogen Production Hydrogen Delivery Fuel Cells Technology Validation Manufacturing Codes & Standards Education Systems Analysis Contacts Current Technology

394

Hydrogen Delivery Liquefaction and Compression  

NLE Websites -- All DOE Office Websites (Extended Search)

to Praxair Hydrogen Liquefaction Hydrogen Compression 3 Praxair at a Glance The largest industrial gas company in North and South America Only U.S. Hydrogen Supplier in All Sizes...

395

The Bumpy Road to Hydrogen  

E-Print Network (OSTI)

It appears to us that hydrogen is a highly promising option06—16 The Bumpy Road to Hydrogen Daniel Sperling Joan OgdenThe Bumpy Road to Hydrogen 1 Daniel Sperling and Joan Ogden

Sperling, Dan; Ogden, Joan M

2006-01-01T23:59:59.000Z

396

Renewable Resources for Hydrogen (Presentation)  

Science Conference Proceedings (OSTI)

This presentation provides an overview of renewable resources for hydrogen. It was presented at the National Hydrogen Association Hydrogen Conference & Expo in Long Beach, CA, May 3-6, 2010.

Jalalzadeh-Azar, A. A.

2010-05-03T23:59:59.000Z

397

Hydrogen Storage- Overview  

NLE Websites -- All DOE Office Websites (Extended Search)

- - Overview George Thomas, Hydrogen Consultant to SNL * and Jay Keller, Hydrogen Program Manager Sandia National Laboratories H 2 Delivery and Infrastructure Workshop May 7-8, 2003 * Most of this presentation has been extracted from George Thomas' invited BES Hydrogen Workshop presentation (May 13-14, 2003) Sandia National Laboratories 4/14/03 2 Sandia National Laboratories From George Thomas, BES workshop 5/13/03 H 2 storage is a critical enabling technology for H 2 use as an energy carrier The low volumetric density of gaseous fuels requires a storage method which compacts the fuel. Hence, hydrogen storage systems are inherently more complex than liquid fuels. Storage technologies are needed in all aspects of hydrogen utilization. production distribution utilization

398

Electrochemical Hydrogen Compression (EHC)  

NLE Websites -- All DOE Office Websites (Extended Search)

Electrochemical Hydrogen Compression (EHC) Pinakin Patel and Ludwig Lipp Presentation at DOE Hydrogen Compression, Storage and Dispensing Workshop at ANL Argonne, IL March 20, 2013 2 * Experience with all fuel cells - MCFC, SOFC, PEM, PAFC, etc. * Excellent progress in commercialization of MCFC technology (>300 MW installed + backlog, >50 MW per year production rate, 11 MW single site unit in Korea, >1.5 billion kWh produced) * Unique internal reforming technology for high efficiency fuel cells FCE Overview $- $2,000 $4,000 $6,000 $8,000 $10,000 2003 2007 2011 mid-term Product cost per kW 3 H 2 Peak and Back- up Power Fuel Cell Cars DFC ® Power Plant (Electricity + Hydrogen) Solid State Hydrogen Separator (EHS) Solid State Hydrogen

399

NREL: Learning - Hydrogen Storage  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Storage Hydrogen Storage On the one hand, hydrogen's great asset as a renewable energy carrier is that it is storable and transportable. On the other hand, its very low natural density requires storage volumes that are impractical for vehicles and many other uses. Current practice is to compress the gas in pressurized tanks, but this still provides only limited driving range for vehicles and is bulkier than desirable for other uses as well. Liquefying the hydrogen more than doubles the fuel density, but uses up substantial amounts of energy to lower the temperature sufficiently (-253°C at atmospheric pressure), requires expensive insulated tanks to maintain that temperature, and still falls short of desired driving range. One possible way to store hydrogen at higher density is in the spaces within the crystalline

400

Hydrogen Threshold Cost Calculation  

NLE Websites -- All DOE Office Websites (Extended Search)

Program Record (Offices of Fuel Cell Technologies) Program Record (Offices of Fuel Cell Technologies) Record #: 11007 Date: March 25, 2011 Title: Hydrogen Threshold Cost Calculation Originator: Mark Ruth & Fred Joseck Approved by: Sunita Satyapal Date: March 24, 2011 Description: The hydrogen threshold cost is defined as the hydrogen cost in the range of $2.00-$4.00/gge (2007$) which represents the cost at which hydrogen fuel cell electric vehicles (FCEVs) are projected to become competitive on a cost per mile basis with the competing vehicles [gasoline in hybrid-electric vehicles (HEVs)] in 2020. This record documents the methodology and assumptions used to calculate that threshold cost. Principles: The cost threshold analysis is a "top-down" analysis of the cost at which hydrogen would be

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

Hydrogen Purity Standard  

NLE Websites -- All DOE Office Websites (Extended Search)

Compressed Gas Association Compressed Gas Association Roger A. Smith Technical Director April 26, 2004 Hydrogen Purity Standard Compressed Gas Association 2 Compressed Gas Association ‹ 150 Members „ Industrial Gas Companies „ Equipment Manufacturers „ Other Gas Industry Associations „ Other SDOs ‹ Manufacturers, Fillers, Distributors, and Transporters of Industrial and Medical Gases Compressed Gas Association 3 Hydrogen Activities ‹ Committees „ Hydrogen Fuel Technology „ Bulk Distribution Equipment „ Hazardous Materials Codes „ Gas Specifications „ Cylinders, Valves & PRD's ‹ International „ Europe (EIGA) „ Japan (JIGA) „ Asia (AIGA) „ United Nations Compressed Gas Association 4 Hydrogen Purity Standard ‹ Draft hydrogen purity standard for stationary fuel cells and ICE's in 10 months

402

Hydrogen in compound semiconductors  

DOE Green Energy (OSTI)

Progress in the understanding of hydrogen and its interactions in III/V and II/VI compound semiconductors is reviewed. Donor, acceptor and deep level passivation is well established in III/V compounds based on electrical measurements and on spectroscopic studies. The hydrogen donor levels in GaAs and GaP are estimated to lie near E{sub v}+0.5 eV and E{sub v}+0.3 eV, respectively. Arsenic acceptors have been passivated by hydrogen in CdTe and the very first nitrogen-hydrogen local vibrational model spectra in ZnSe have been reported. This long awaited result may lead to an explanation for the poor activation of nitrogen acceptors in ZnSe grown by techniques which involve high concentrations of hydrogen.

Haller, E.E.

1993-05-01T23:59:59.000Z

403

Hydrogen Fuel Quality  

DOE Green Energy (OSTI)

For the past 6 years, open discussions and/or meetings have been held and are still on-going with OEM, Hydrogen Suppliers, other test facilities from the North America Team and International collaborators regarding experimental results, fuel clean-up cost, modeling, and analytical techniques to help determine levels of constituents for the development of an international standard for hydrogen fuel quality (ISO TC197 WG-12). Significant progress has been made. The process for the fuel standard is entering final stages as a result of the technical accomplishments. The objectives are to: (1) Determine the allowable levels of hydrogen fuel contaminants in support of the development of science-based international standards for hydrogen fuel quality (ISO TC197 WG-12); and (2) Validate the ASTM test method for determining low levels of non-hydrogen constituents.

Rockward, Tommy [Los Alamos National Laboratory

2012-07-16T23:59:59.000Z

404

Materials for high-temperature hydrogen fluorine environments. Final report, June 1976-December 1978  

DOE Green Energy (OSTI)

A determination has been made of the stability of 35 materials under high-temperature, fluorine rich, hydrogen fluoride torch testing. Refractory materials tested included 4 borides, 3 carbides, 3 nitrides, 12 oxides, 1 oxynitride, 1 sulfide, 10 metals, and carbon (10 types). Three materials distinctly performed better than nickel: lanthanum hexaboride, calcium hexaboride, and lanthanum silicon oxynitride. Of these, lanthanum hexaboride is the best candidate tested since it has an estimated upper use temperature > 1726 K, which is above the melting point and more than 300 K above the upper use temperature of nickel.

Holcombe, C.E. Jr.; Kovach, L.

1981-03-01T23:59:59.000Z

405

Hydrogen Data Book from the Hydrogen Analysis Resource Center  

DOE Data Explorer (OSTI)

The Hydrogen Data Book contains a wide range of factual information on hydrogen and fuel cells (e.g., hydrogen properties, hydrogen production and delivery data, and information on fuel cells and fuel cell vehicles), and it also provides other data that might be useful in analyses of hydrogen infrastructure in the United States (e.g., demographic data and data on energy supply and/or infrastructure). ItÆs made available from the Hydrogen Analysis Resource Center along with a wealth of related information. The related information includes guidelines for DOE Hydrogen Program Analysis, various calculator tools, a hydrogen glossary, related websites, and analysis tools relevant to hydrogen and fuel cells. [From http://hydrogen.pnl.gov/cocoon/morf/hydrogen

406

Hydrogen Energy | Open Energy Information  

Open Energy Info (EERE)

reduce carbon emissions through low-carbon hydrogen fuel for electricity generation and carbon sequestration technologies. References Hydrogen Energy1 LinkedIn Connections...

407

Hydrogen Bus Technology Validation Program  

E-Print Network (OSTI)

of a Hydrogen Enriched CNG Production Engine Conversion”,from Hydrogen Enriched CNG Production Engines”, SAE 02FFL-dynamometer ..….13 Figure 2. CNG Brake Thermal Efficiency (

Burke, Andy; McCaffrey, Zach; Miller, Marshall; Collier, Kirk; Mulligan, Neal

2005-01-01T23:59:59.000Z

408

Hydrogen and Fuel Cell Technologies  

Energy.gov (U.S. Department of Energy (DOE))

Hydrogen is the simplest element on Earth. A hydrogen atom consists of only one proton and one electron. It is also the most plentiful element in the universe.

409

Materials and mechanisms of high temperature lithium sulfide batteries  

DOE Green Energy (OSTI)

New materials have encouraged development of bipolar Li-Al/FeS{sub 2} batteries for electric vehicle (EV) applications. Current technology employs a two-phase Li-alloy negative electrode low-melting, LiCl-rich LiCl-LiBr-KBr molten salt electrolyte, and either an FeS or an upper-plateau (UP) FeS{sub 2} positive electrode. These components are assembled in a sealed bipolar battery configuration. Use of the two-phase Li-alloy ({alpha} + {beta} Li-Al and Li{sub 5}Al{sub 5}Fe{sub 2}) negative electrode provides in situ overcharge tolerance that renders the bipolar design viable. Employing LiCl-rich LiCl-LiBr-KBr electrolyte in ``electrolyte-starved`` calls achieves low-burdened cells, that possess low area-specific impedance; comparable to that of flooded cells using LiCl-LiBr-KBr eutectic electrolyte. The combination of dense UP FeS{sub 2} electrodes and low-melting electrolyte produces a stable and reversible couple, achieving over 1000 cycle life in flooded cells, with high power capabilities. In addition, a family of stable sulfide ceramic/sealant materials was developed that produce high-strength bonds between a variety of metals and ceramics, which renders lithium/iron suffide bipolar stacks practical. Bipolar Li-Al/FeS{sub 2} cells and four-cell stacks using these seals are being built and tested in the 13 cm diameter size for EV applications. To date, Li-Al/FeS{sub 2} cells have attained 400 W/kg power at 80% DOD and 180 Wh/kg energy at the 30 W/kg rate. When cell performance characteristics are used to model full-scale EV and hybrid vehicle (HV) batteries, they are projected to meet or exceed the performance requirements for a large variety of EV and HV applications. Efficient production and application of Li-alloys and Li-salt electrolyte are critical to approaching battery cost objectives.

Kaun, T.D.; Hash, M.C.; Henriksen, G.L.; Jansen, A.N.; Vissers, D.R.

1994-05-01T23:59:59.000Z

410

Flammability Limits of Hydrogen-Air Mixtures  

Science Conference Proceedings (OSTI)

Technical Paper / Safety and Technology of Nuclear Hydrogen Production, Control, and Management / Hydrogen Safety and Recombiners

H. Cheikhravat; N. Chaumeix; A. Bentaib; C.-E. Paillard

411

Hydrogen Production: Overview of Technology Options  

NLE Websites -- All DOE Office Websites (Extended Search)

Table of Contents Producing Hydrogen...1 Hydrogen Production Technologies ...3 Challenges and Research Needs...4 Technology...

412

Chromatographic hydrogen isotope separation  

DOE Patents (OSTI)

Intermetallic compounds with the CaCu.sub.5 type of crystal structure, particularly LaNiCo.sub.4 and CaNi.sub.5, exhibit high separation factors and fast equilibrium times and therefore are useful for packing a chromatographic hydrogen isotope separation colum. The addition of an inert metal to dilute the hydride improves performance of the column. A large scale mutli-stage chromatographic separation process run as a secondary process off a hydrogen feedstream from an industrial plant which uses large volumes of hydrogen can produce large quantities of heavy water at an effective cost for use in heavy water reactors.

Aldridge, Frederick T. (Livermore, CA)

1981-01-01T23:59:59.000Z

413

Questions and Issues on Hydrogen Pipeline Transmission of Hydrogen  

E-Print Network (OSTI)

Questions and Issues on Hydrogen Pipelines Pipeline Transmission of Hydrogen Doe Hydrogen Pipeline Working Group Meeting August 31, 2005 #12;Pipeline Transmission of Hydrogen --- 2 Copyright: Air Liquide Pipeline Inventory Breakdown by gases 0 500 1000 1500 2000 2500 3000 3500 KM N2 2956 km O2 3447 km H2 1736

414

Hawaii hydrogen power park Hawaii Hydrogen Power Park  

E-Print Network (OSTI)

energy source. (Barrier V-Renewable Integration) Hydrogen storage & distribution system. (Barrier V fueled vehicle hydrogen dispensing system. Demonstrate hydrogen as an energy carrier. Investigate Electrolyzer ValveManifold Water High Pressure H2 Storage Fuel Cell AC Power H2 Compressor Hydrogen Supply O2

415

hydrogen | OpenEI  

Open Energy Info (EERE)

hydrogen hydrogen Dataset Summary Description Technical Reference for Hydrogen Compatibility of Materials Source Sandia National Laboratories Date Released June 03rd, 2010 (4 years ago) Date Updated September 27th, 2012 (2 years ago) Keywords Compatibility of Materials hydrogen NREL Sandia Technical Database Technical Reference Data application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon 1100_cia85_ten_fra_fat.xlsx (xlsx, 60.9 KiB) application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon 1100_san10_fra_fat.xlsx (xlsx, 58.5 KiB) application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon 1100_san10b_fra_fat.xlsx (xlsx, 59.4 KiB) application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon 1100_san11_fra_fat.xlsx (xlsx, 48.4 KiB)

416

Fiber optic hydrogen sensor  

DOE Green Energy (OSTI)

This report covers the development of fiber optic hydrogen and temperature sensors for monitoring dissolved hydrogen gas in transformer oil. The concentration of hydrogen gas is a measure of the corona and spark discharge within the transformer and reflects the state of health of the transformer. Key features of the instrument include use of palladium alloys to enhance hydrogen sensitivity, a microprocessor controlled instrument with RS-232, liquid crystal readout, and 4-20 ma. current loop interfaces. Calibration data for both sensors can be down loaded to the instrument through the RS-232 interface. This project was supported by the Technology Transfer Initiative in collaboration with J. W. Harley, Inc. through the mechanism of a cooperative research and development agreement (CRADA).

Butler, M.A.; Sanchez, R.; Dulleck, G.R.

1996-05-01T23:59:59.000Z

417

X. Hydrogen Program Contacts  

NLE Websites -- All DOE Office Websites (Extended Search)

C. Lowell Miller, Director Office of Sequestration, Hydrogen and Clean Coal Fuels DOE Office of Fossil Energy Phone: 301-903-9453 Email: Lowell.Miller@hq.doe.gov...

418

Hydrogen in titanium alloys  

DOE Green Energy (OSTI)

The titanium alloys that offer properties worthy of consideration for fusion reactors are Ti-6Al-4V, Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) and Ti-5Al-6Sn-2Zr-1Mo-Si (Ti-5621S). The Ti-6242S and Ti-5621S are being considered because of their high creep resistance at elevated temperatures of 500/sup 0/C. Also, irradiation tests on these alloys have shown irradiation creep properties comparable to 20% cold worked 316 stainless steel. These alloys would be susceptible to slow strain rate embrittlement if sufficient hydrogen concentrations are obtained. Concentrations greater than 250 to 500 wppm hydrogen and temperatures lower than 100 to 150/sup 0/C are approximate threshold conditions for detrimental effects on tensile properties. Indications are that at the elevated temperature - low hydrogen pressure conditions of the reactors, there would be negligible hydrogen embrittlement.

Wille, G.W.; Davis, J.W.

1981-04-01T23:59:59.000Z

419

HYDROGEN ASSISTED DIESEL COMBUSTION.  

E-Print Network (OSTI)

??In this study, the effect of hydrogen assisted diesel combustion on conventional and advanced combustion modes was investigated on a DDC/VM Motori 2.5L, 4-cylinder, turbocharged,… (more)

Lilik, Gregory

2008-01-01T23:59:59.000Z

420

Hydrogen & Fuel Cells  

Energy.gov (U.S. Department of Energy (DOE))

The U.S. Department of Energy (DOE) is the lead federal agency for applied research and development (R&D) of cutting edge hydrogen and fuel cell technologies. DOE supports R&D that makes it...

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

SRD 134 Hydrogen  

Science Conference Proceedings (OSTI)

> Return to SRD 134, Index of Semiconductor Process Gases. HYDROGEN. MW [1]. 2.0159. NBP [1]. 20.390 K. TP [1]. 13.957 K. H 2. Pc [1]. 1.3150 MPa ...

2012-07-27T23:59:59.000Z

422

National Hydrogen Energy Roadmap  

Fuel Cell Technologies Publication and Product Library (EERE)

This report was unveiled by Energy Secretary Spencer Abraham in November 2002 and provides a blueprint for the coordinated, long-term, public and private efforts required for hydrogen energy developme

423

Hydrogen Fuel Cell Vehicles  

E-Print Network (OSTI)

Operation of a Solid Polymer Fuel Cell: A Parametric Model,"1991). G. Bronoel, "Hydrogen-Air Fuel Cells Without PreciousG. Abens, "Development of a Fuel Cell Power Source for Bus,"

Delucchi, Mark

1992-01-01T23:59:59.000Z

424

Renewable Hydrogen (Presentation)  

SciTech Connect

Presentation about the United State's dependence on oil, how energy solutions are challenging, and why hydrogen should be considered as a long-term alternative for transportation fuel.

Remick, R. J.

2009-11-16T23:59:59.000Z

425

NREL: Learning - Hydrogen Production  

NLE Websites -- All DOE Office Websites (Extended Search)

Production Production The simplest and most common element, hydrogen is all around us, but always as a compound with other elements. To make it usable in fuel cells or otherwise provide energy, we must expend energy or modify another energy source to extract it from the fossil fuel, biomass, water, or other compound in which it is found. Nearly all hydrogen production in the United States today is by steam reformation of natural gas. This, however, releases carbon dioxide in the process and trades one relatively clean fuel for another, with associated energy loss, so it does little to meet national energy needs. Hydrogen can also be produced by electrolysis-passing an electrical current through water to break it into hydrogen and oxygen-but electrolysis is inefficient and is only as clean

426

Hydrogen and Fuel Cells  

Energy.gov (U.S. Department of Energy (DOE))

The U.S. Department of Energy (DOE) is the lead federal agency for applied research and development (R&D) of cutting edge hydrogen and fuel cell technologies. DOE supports R&D that makes it...

427

Hydrogen recovery process  

DOE Patents (OSTI)

A treatment process for a hydrogen-containing off-gas stream from a refinery, petrochemical plant or the like. The process includes three separation steps: condensation, membrane separation and hydrocarbon fraction separation. The membrane separation step is characterized in that it is carried out under conditions at which the membrane exhibits a selectivity in favor of methane over hydrogen of at least about 2.5.

Baker, Richard W. (Palo Alto, CA); Lokhandwala, Kaaeid A. (Union City, CA); He, Zhenjie (Fremont, CA); Pinnau, Ingo (Palo Alto, CA)

2000-01-01T23:59:59.000Z

428

Purdue Hydrogen Systems Laboratory  

DOE Green Energy (OSTI)

The Hydrogen Systems Laboratory in a unique partnership between Purdue University's main campus in West Lafayette and the Calumet campus was established and its capabilities were enhanced towards technology demonstrators. The laboratory engaged in basic research in hydrogen production and storage and initiated engineering systems research with performance goals established as per the USDOE Hydrogen, Fuel Cells, and Infrastructure Technologies Program. In the chemical storage and recycling part of the project, we worked towards maximum recycling yield via novel chemical selection and novel recycling pathways. With the basic potential of a large hydrogen yield from AB, we used it as an example chemical but have also discovered its limitations. Further, we discovered alternate storage chemicals that appear to have advantages over AB. We improved the slurry hydrolysis approach by using advanced slurry/solution mixing techniques. We demonstrated vehicle scale aqueous and non-aqueous slurry reactors to address various engineering issues in on-board chemical hydrogen storage systems. We measured the thermal properties of raw and spent AB. Further, we conducted experiments to determine reaction mechanisms and kinetics of hydrothermolysis in hydride-rich solutions and slurries. We also developed a continuous flow reactor and a laboratory scale fuel cell power generation system. The biological hydrogen production work summarized as Task 4.0 below, included investigating optimal hydrogen production cultures for different substrates, reducing the water content in the substrate, and integrating results from vacuum tube solar collector based pre and post processing tests into an enhanced energy system model. An automated testing device was used to finalize optimal hydrogen production conditions using statistical procedures. A 3 L commercial fermentor (New Brunswick, BioFlo 115) was used to finalize testing of larger samples and to consider issues related to scale up. Efforts continued to explore existing catalytic methods involving nano catalysts for capture of CO2 from the fermentation process.

Jay P Gore; Robert Kramer; Timothee L Pourpoint; P. V. Ramachandran; Arvind Varma; Yuan Zheng

2011-12-28T23:59:59.000Z

429

Hydrogen from Coal Edward Schmetz  

E-Print Network (OSTI)

gasification technology assumes advanced E-gas gasification. · RD&D is estimated to reduce the cost of hydrogenGenFutureGen Hydrogen Fuel Initiative Hydrogen Fuel Initiative Gasification Fuel Cells Turbines Gasification Fuel Cells-production plant · Hydrogen from Coal Program will coordinate with associated DOE programs in Gasification, Fuel

430

MEASUREMENT OF CARBONYL FLUORIDE, HYDROGEN ...  

Science Conference Proceedings (OSTI)

Page 1. MEASUREMENT OF CARBONYL FLUORIDE, HYDROGEN FLUORIDE, AND OTHER COMBUSTION BYPRODUCTS DURING FIRE ...

2011-11-15T23:59:59.000Z

431

Nanostructured materials for hydrogen storage  

DOE Patents (OSTI)

A system for hydrogen storage comprising a porous nano-structured material with hydrogen absorbed on the surfaces of the porous nano-structured material. The system of hydrogen storage comprises absorbing hydrogen on the surfaces of a porous nano-structured semiconductor material.

Williamson, Andrew J. (Pleasanton, CA); Reboredo, Fernando A. (Pleasanton, CA)

2007-12-04T23:59:59.000Z

432

Stable cycling of lithium sulfide cathodes through strong affinity with a bifunctional binder  

E-Print Network (OSTI)

Stable cycling of lithium sulfide cathodes through strong affinity with a bifunctional binder Zhi lithium­sulfur batteries have attracted great interest in recent years because of their high theoretical specific energy, which is several times that of current lithium-ion batteries. Compared to sulfur, fully

Cui, Yi

433

Metallic hydrogen research  

DOE Green Energy (OSTI)

Theoretical studies predict that molecular hydrogen can be converted to the metallic phase at very high density and pressure. These conditions were achieved by subjecting liquid hydrogen to isentropic compression in a magnetic-flux compression device. Hydrogen became electrically conducting at a density of about 1.06 g/cm/sup 3/ and a calculated pressure of about 2 Mbar. In the experimental device, a cylindrical liner, on implosion by high explosive, compresses a magnetic flux which in turn isentropically compresses a hydrogen sample; coaxial conical anvils prevent escape of the sample during compression. One anvil contains a coaxial cable that uses alumina ceramic as an insulator; this probe allows continuous measurement of the electrical conductivity of the hydrogen. A flash x-ray radiograph exposed during the experiment records the location of the sample-tube boundaries and permits calculation of the sample density. The theoretical underpinnings of the metallic transition of hydrogen are briefly summarized, and the experimental apparatus and technique, analytical methods, and results are described. 9 figures.

Burgess, T.J.; Hawke, R.S.

1978-11-16T23:59:59.000Z

434

The Sustainable Hydrogen Economy  

DOE Green Energy (OSTI)

Identifying and building a sustainable energy system is perhaps one of the most critical issues that today's society must address. Replacing our current energy carrier mix with a sustainable fuel is one of the key pieces in that system. Hydrogen as an energy carrier, primarily derived from water, can address issues of sustainability, environmental emissions and energy security. The hydrogen economy then is the production of hydrogen, its distribution and utilization as an energy carrier. A key piece of this hydrogen economy is the fuel cell. A fuel cell converts the chemical energy in a fuel into low-voltage dc electricity and when using hydrogen as the fuel, the only emission is water vapor. While the basic understanding of fuel cell technology has been known since 1839, it has only been recently that fuel cells have shown their potential as an energy conversion device for both transportation and stationary applications. This talk will introduce the sustainable hydrogen economy and address some of the issues and barriers relating to its deployment as part of a sustainable energy system.

Turner, John (NREL)

2005-07-06T23:59:59.000Z

435

Examining hydrogen transitions.  

DOE Green Energy (OSTI)

This report describes the results of an effort to identify key analytic issues associated with modeling a transition to hydrogen as a fuel for light duty vehicles, and using insights gained from this effort to suggest ways to improve ongoing modeling efforts. The study reported on here examined multiple hydrogen scenarios reported in the literature, identified modeling issues associated with those scenario analyses, and examined three DOE-sponsored hydrogen transition models in the context of those modeling issues. The three hydrogen transition models are HyTrans (contractor: Oak Ridge National Laboratory), MARKAL/DOE* (Brookhaven National Laboratory), and NEMS-H2 (OnLocation, Inc). The goals of these models are (1) to help DOE improve its R&D effort by identifying key technology and other roadblocks to a transition and testing its technical program goals to determine whether they are likely to lead to the market success of hydrogen technologies, (2) to evaluate alternative policies to promote a transition, and (3) to estimate the costs and benefits of alternative pathways to hydrogen development.

Plotkin, S. E.; Energy Systems

2007-03-01T23:59:59.000Z

436

Synthesis and Characterization of CO-and H2S-Tolerant Electrocatalysts for PEM Fuel Cell  

DOE Green Energy (OSTI)

The present state-of-art Proton Exchange Membrane Fuel Cell (PEMFC) technology is based on platinum (Pt) as a catalyst for both the fuel (anode) and air (cathode) electrodes. This catalyst is highly active but susceptible to poisoning by CO, which may be present in the H{sub 2}-fuel used or may be introduced during the fuel processing. Presence of trace amount of CO and H{sub 2}S in the H{sub 2}-fuel poisons the anode irreversibly and decreases the performance of the PEMFCs. In an effort to reduce the Pt-loading and improve the PEMFC performance, we propose to synthesize a number of Pt-based binary, ternary, and quaternary electrocatalysts using Ru, Mo, Ir, Ni, and Co as a substitute for Pt. By fine-tuning the metal loadings and compositions of candidate electrocatalysts, we plan to minimize the cost and optimize the catalyst activity and performance in PEMFC. The feasibility of the novel electrocatalysts will be demonstrated in the proposed effort with gas phase CO and H{sub 2}S concentrations typical of those found in reformed fuel gas with coal/natural gas/methanol feedstocks. During this reporting period we synthesized four Pt-based electrocatalysts catalysts (Pt/Ru/Mo/Se, Pt/Ru/Mo/Ir, Pt/Ru/Mo/W, Ptr/Ru/Mo/Co) on Vulcan XG72 Carbon support by both conventional and ultra-sonication method. From current-voltage performance study, the catalytic activity was found in the increasing order of Pt/Ru/Mo/Ir > Pt/Ru/Mo/W > Pt/Ru/Mo/Co > Pt/Ru/MO/Se. Sonication method appears to provide better dispersion of catalysts on carbon support.

Shamsuddin Ilias

2005-12-22T23:59:59.000Z

437

Injection of CO2 with H2S and SO2 and Subsequent Mineral Trapping in Sandstone-Shale Formation  

E-Print Network (OSTI)

National Conference on Carbon Sequestration. Washington, DC.model for geological carbon sequestration, 2002 Geologicalof geological carbon sequestration have been conducted (

Xu, Tianfu; Apps, John A.; Pruess, Karsten; Yamamoto, Hajime

2004-01-01T23:59:59.000Z

438

Injection of CO2 with H2S and SO2 and Subsequent Mineral Trapping in Sandstone-Shale Formation  

E-Print Network (OSTI)

these injected acid gases with shale-confining layers of ato illustrate effects of shale on acid-gas sequestration andusing a sandstone-shale sequence under acid-gas injection

Xu, Tianfu; Apps, John A.; Pruess, Karsten; Yamamoto, Hajime

2004-01-01T23:59:59.000Z

439

Rate-Based Modeling of Reactive Absorption of CO2 and H2S into Aqueous Methyldiethanolamine  

E-Print Network (OSTI)

at Austin, Austin, Texas 78712 A general framework was developed to model the transport processes that take into the mass and energy balance at a given segment or tray of the column for the simulataneous absorption of CO

Rochelle, Gary T.

440

A dsorption of H2 S or SO2 on an activated carbon cloth modified by ammonia treatment  

E-Print Network (OSTI)

relatively high flue gas desulfurization capacities at low temperature. ACF shows a great rate of transferSO4 at room temperature by the humidity within the reactant gas. They found that ACF is more suitable to a saturator taining an aqueous solution of 28% NH3. The carrier gas line and the saturator were kept

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "h2s hydrogen sulfide" 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

Modeling of fate and transport of co-injection of H2S with CO2 in deep saline formations  

SciTech Connect

The geological storage of CO{sub 2} in deep saline formations is increasing seen as a viable strategy to reduce the release of greenhouse gases into the atmosphere. However, costs of capture and compression of CO{sub 2} from industrial waste streams containing small quantities of sulfur and nitrogen compounds such as SO{sub 2}, H{sub 2}S and N{sub 2} are very expensive. Therefore, studies on the co-injection of CO{sub 2} containing other acid gases from industrial emissions are very important. In this paper, numerical simulations were performed to study the co-injection of H{sub 2}S with CO{sub 2} in sandstone and carbonate formations. Results indicate that the preferential dissolution of H{sub 2}S gas (compared with CO{sub 2} gas) into formation water results in the delayed breakthrough of H{sub 2}S gas. Co-injection of H{sub 2}S results in the precipitation of pyrite through interactions between the dissolved H{sub 2}S and Fe{sup 2+} from the dissolution of Fe-bearing minerals. Additional injection of H{sub 2}S reduces the capabilities for solubility and mineral trappings of CO{sub 2} compared to the CO{sub 2} only case. In comparison to the sandstone (siliciclastic) formation, the carbonate formation is less favorable to the mineral sequestration of CO{sub 2}. Different from CO{sub 2} mineral trapping, the presence of Fe-bearing siliciclastic and/or carbonate is more favorable to the H{sub 2}S mineral trapping.

Zhang, W.; Xu, T.; Li, Y.

2010-12-15T23:59:59.000Z

442

Injection of CO2 with H2S and SO2 and Subsequent Mineral Trapping in Sandstone-Shale Formation  

Science Conference Proceedings (OSTI)

Carbon dioxide (CO{sub 2}) injection into deep geologic formations can potentially reduce atmospheric emissions of greenhouse gases. Sequestering less-pure CO{sub 2} waste streams (containing H{sub 2}S and/or SO{sub 2}) would be less expensive or would require less energy than separating CO{sub 2} from flue gas or a coal gasification process. The long-term interaction of these injected acid gases with shale-confining layers of a sandstone injection zone has not been well investigated. We therefore have developed a conceptual model of injection of CO{sub 2} with H{sub 2}S and/or SO{sub 2} into a sandstone-shale sequence, using hydrogeologic properties and mineral compositions commonly encountered in Gulf Coast sediments of the United States. We have performed numerical simulations of a 1-D radial well region considering sandstone alone and a 2-D model using a sandstone-shale sequence under acid-gas injection conditions. Results indicate that shale plays a limited role in mineral alteration and sequestration of gases within a sandstone horizon for short time periods (10,000 years in present simulations). The co-injection of SO{sub 2} results in different pH distribution, mineral alteration patterns, and CO{sub 2} mineral sequestration than the co-injection of H{sub 2}S or injection of CO{sub 2} alone. Simulations generate a zonal distribution of mineral alteration and formation of carbon and sulfur trapping minerals that depends on the pH distribution. The co-injection of SO{sub 2} results in a larger and stronger acidified zone close to the well. Precipitation of carbon trapping minerals occurs within the higher pH regions beyond the acidified zones. In contrast, sulfur trapping minerals are stable at low pH ranges (below 5) within the front of the acidified zone. Corrosion and well abandonment due to the co-injection of SO{sub 2} could be important issues. Significant CO{sub 2} is sequestered in ankerite and dawsonite, and some in siderite. The CO{sub 2} mineral-trapping capability can reach 80 kg per cubic meter of medium. Most sulfur is trapped through alunite precipitation, although some is trapped by anhydrite precipitation and minor amount of pyrite. The addition of the acid gases and induced mineral alteration result in changes in porosity. The limited information currently available on the mineralogy of natural high-pressure acid-gas reservoirs is generally consistent with our simulations.

Xu, Tianfu; Apps, John A.; Pruess, Karsten; Yamamoto, Hajime

2004-09-07T23:59:59.000Z

443

Injection of CO2 with H2S and SO2 and Subsequent Mineral Trapping in Sandstone-Shale Formation  

E-Print Network (OSTI)

carbon dioxide in a sandstone-shale system, Submitted to “Sandstone 1x10 -8 1x10 -9 Shale 1x10 -8 1x10 -9 k rl = S * ?alone or the sandstone-shale sequence, four reactive

Xu, Tianfu; Apps, John A.; Pruess, Karsten; Yamamoto, Hajime

2004-01-01T23:59:59.000Z

444

BIODESULF(TM), A Novel Biological Technology for the Removal of H2S From Sour Natural Gas  

Science Conference Proceedings (OSTI)

The state-of-the-art technologies for the removal of sulfur compounds from Sour Natural Gas (SNG) are not cost-effective when scaled down to approximately 2-5 MMSCFD. At the same time, the SNG Production is increasing at 3-6 TCF/Yr and -78 TCF potential reserves are also sour. Assuming only 3% treatment of this potential SNG market is for small volume processing, the potential U.S. Market is worth $0.14 to $0.28 billion. Therefore, the Gas Processing Industry is seeking novel, cost-effective, environmentally compatible and operator friendly technologies applicable to the small volume producers in the range of less than 1 MMSCFD to - 5 MMSCFD. A novel biological process, BIODESTJLFTM (patent pending), developed at ARCTECH removes H{sub 2}S and other sulfur contaminants that make the Natural Gas Sour. The removal is accomplished by utilizing an adapted mixed microbial culture (consortium). A variety of anaerobic microbial consortia from ARCTECH`s Microbial Culture Collection were grown and tested for removal of H{sub 2}S. One of these consortia, termed SS-11 was found to be particularly effective. Utilizing the SS-11 consortium, a process has been developed on a laboratory-scale to remove sulfur species from Sour Natural Gas at well head production pressures and temperatures. The process has been independently evaluated and found to be promising in effectively removing H{sub 2}S and other sulfur species cost effectively.

Srivastava, K.C.; Stashick, J.J.; Johnson, P.E.; Kaushik, N.K.

1997-10-01T23:59:59.000Z

445

Energy Production from Coal Syngas Containing H2S via Solid Oxide Fuel Cells Utilizing Lanthanum Strontium Vanadate Anodes.  

E-Print Network (OSTI)

??Lanthanum strontium vanadate (LSV), a perovskite ceramic electrocatalyst suitable for use as a solid oxide fuel cell (SOFC) anode, has shown significant activity toward the… (more)

Cooper, Matthew E.

2008-01-01T23:59:59.000Z

446

SYNTHESIS AND CHARACTERIZATION OF CO-AND H2S-TOLERANT ELECTROCATALYSTS FOR PEM FUEL CELL  

DOE Green Energy (OSTI)

The present state-of-art Proton Exchange Membrane Fuel Cell (PEMFC) technology is based on platinum (Pt) as a catalyst for both the fuel (anode) and air (cathode) electrodes. This catalyst is highly active but susceptible to poisoning by CO, which may be present in the H{sub 2}-fuel used or may be introduced during the fuel processing. Presence of trace amount of CO and H{sub 2}S in the H{sub 2}-fuel poisons the anode irreversibly and decreases the performance of the PEMFCs. In an effort to reduce the Pt-loading and improve the PEMFC performance, we propose to synthesize a number of Pt-based binary, ternary, and quaternary electrocatalysts using Ru, Mo, Ir, Ni, and Co as a substitute for Pt. By fine-tuning the metal loadings and compositions of candidate electrocatalysts, we plan to minimize the cost and optimize the catalyst activity and performance in PEMFC. The feasibility of the novel electrocatalysts will be demonstrated in the proposed effort with gas phase CO and H{sub 2}S concentrations typical of those found in reformed fuel gas with coal/natural gas/methanol feedstocks. During this reporting period several bi-metallic electrocatalysts were synthesized using ultra-sonication. These catalysts (Pt/Ru, Pt/Mo and Pt/Ir) were tested in MEAs. From Galvonstatic study the catalytic activity was found in the order of: Pt/Ru/C > Pt/Mo/C > Pt/Ir/C. It appears that electrocatalysts prepared by ultra-sonication process are more active compared to the conventional technique. Work is in progress to further study these catalysts for CO-tolerance in PEMFC and identify potential candidate metals for synthesis of tri-metallic electrocatalysts.

Shamsuddin Ilias

2005-03-29T23:59:59.000Z

447

SYNTHESIS AND CHARACTERIZATION OF CO-AND H2S-TOLERANT ELECTROCATALYSTS FOR PEM FUEL CELL  

DOE Green Energy (OSTI)

The present state-of-art Proton Exchange Membrane Fuel Cell (PEMFC) technology is based on platinum (Pt) as a catalyst for both the fuel (anode) and air (cathode) electrodes. This catalyst is highly active but susceptible to poisoning by CO, which may be present in the H{sub 2}-fuel used or may be introduced during the fuel processing. Presence of trace amount of CO and H{sub 2}S in the H{sub 2}-fuel poisons the anode irreversibly and decreases the performance of the PEMFCs. In an effort to reduce the Pt-loading and improve the PEMFC performance, we propose to synthesize a number of Pt-based binary, ternary, and quaternary electrocatalysts using Ru, Mo, Ir, Ni, and Co as a substitute for Pt. By fine-tuning the metal loadings and compositions of candidate electrocatalysts, we plan to minimize the cost and optimize the catalyst activity and performance in PEMFC. The feasibility of the novel electrocatalysts will be demonstrated in the proposed effort with gas phase CO and H{sub 2}S concentrations typical of those found in reformed fuel gas with coal/natural gas/methanol feedstocks. During this reporting period several bi-metallic electrocatalysts were synthesized and tested in MEAs. From Galvonstatic study the catalytic activity was found in the order of: Pt/Ru/C > Pt/Mo/C > Pt/Ir/C > Pt/Ni/C > Pt/Cr/C. Work in progress to further study these catalysts for CO-tolerance in PEMFC and identify potential candidate metals for synthesis of trimetallic electrocatalysts.

Shamsuddin Ilias

2004-03-31T23:59:59.000Z

448

Questions and Issues on Hydrogen Pipelines: Pipeline Transmission of Hydrogen  

NLE Websites -- All DOE Office Websites (Extended Search)

Issues on Hydrogen Issues on Hydrogen Pipelines Pipeline Transmission of Hydrogen Doe Hydrogen Pipeline Working Group Meeting August 31, 2005 Pipeline Transmission of Hydrogen --- 2 Copyright: Air Liquide Pipeline Inventory Breakdown by gases 0 500 1000 1500 2000 2500 3000 3500 KM N2 2956 km O2 3447 km H2 1736 km CO/Syngas 61 km TOTAL 8200 km Pipeline Inventory 2004 Asie Pacific America Europe Pipeline Transmission of Hydrogen --- 3 Copyright: Pipeline Transmission of Hydrogen --- 4 Copyright: 3. Special structures River Crossings (culvert): 6 (Rhein, Ruhr, Rhein-Herne-Kanal) River crossing (on bridge): 1 (Rhein-Herne-Kanal) Motorway Crossings: 26 Overground Pipelines: approx 21 km Pipeline Transmission of Hydrogen --- 5 Copyright: 5. Mining areas Pipeline Transmission of Hydrogen --- 6 Copyright: France & Netherlands

449

Hydrogen Geysers: Explanation for Observed Evidence of Geologically Recent Volatile-Related Activity on Mercury's Surface  

E-Print Network (OSTI)

High resolution images of Mercury's surface, from the MESSENGER spacecraft, reveal many bright deposits associated with irregular, shallow, rimless depressions whose origins were attributed to volatile-related activity, but absent information on the nature and origin of that volatile matter. Here I describe planetary formation, unlike the cited models, and show that primordial condensation from an atmosphere of solar composition at pressures of one atmosphere or above will lead to iron condensing as a liquid and dissolving copious amounts of hydrogen, which is subsequently released as Mercury's core solidifies and escapes from the surface, yielding the observed pit-like features with associated highly-reflecting matter. The exiting hydrogen chemically reduces some iron compound, probably iron sulfide, to the metal, which accounts for the bright deposits.

J. Marvin Herndon

2011-10-20T23:59:59.000Z

450

FNS Presentation - Hydrogen Station & Hydrogen ICE Vehicles Operation  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Station & Hydrogen ICE Hydrogen Station & Hydrogen ICE Vehicle Operations Federal Network for Sustainability Idaho Falls, Idaho - July 2006 Jim Francfort INL/CON-06-11569 Presentation Outline * Background & Goal * Arizona Public Service (APS) Alternative Fuel (Hydrogen) Pilot Plant - design & operations * Fuel Dispensing * Hydrogen & HCNG Internal Combustion Engine (ICE) Vehicle Testing Activities * Briefly, other AVTA Activities * WWW Information 2 AVTA Background & Goal * Advanced Vehicle Testing Activity (AVTA) is part of the U.S. Department of Energy's (DOE) FreedomCAR and Vehicle Technologies Program * These activities are conducted by the Idaho National Laboratory (INL) & the AVTA testing partner Electric Transportation Applications (ETA) * AVTA Goal - Provide benchmark data for technology

451

Integration of the Mini-Sulfide Sulfite Anthraquinone (MSS-AQ) Pulping Process and Black Liquor Gasification in a Pulp Mill  

Science Conference Proceedings (OSTI)

As many of the recovery boilers and other pieces of large capital equipment of U.S. pulp mills are nearing the end of their useful life, the pulp and paper industry will soon need to make long-term investments in new technologies. The ability to install integrated, complete systems that are highly efficient will impact the industry’s energy use for decades to come. Developing a process for these new systems is key to the adoption of state-of-the-art technologies in the Forest Products industry. This project defined an integrated process model that combines mini-sulfide sulfite anthraquinone (MSS-AQ) pulping and black liquor gasification with a proprietary desulfurization process developed by the Research Triangle Institute. Black liquor gasification is an emerging technology that enables the use of MSS-AQ pulping, which results in higher yield, lower bleaching cost, lower sulfur emissions, and the elimination of causticization requirements. The recently developed gas cleanup/absorber technology can clean the product gas to a state suitable for use in a gas turbine and also regenerate the pulping chemicals needed to for the MSS-AQ pulping process. The combination of three advanced technologies into an integrated design will enable the pulping industry to achieve a new level of efficiency, environmental performance, and cost savings. Because the three technologies are complimentary, their adoption as a streamlined package will ensure their ability to deliver maximum energy and cost savings benefits. The process models developed by this project will enable the successful integration of new technologies into the next generation of chemical pulping mills. When compared to the Kraft reference pulp, the MSS-AQ procedures produced pulps with a 10-15 % yield benefit and the ISO brightness was 1.5-2 times greater. The pulp refined little easier and had a slightly lower apparent sheet density (In both the cases). At similar levels of tear index the MSS-AQ pulps also produced a comparable tensile and burst index pulps. Product gas composition determined using computer simulations The results demonstrate that RVS-1 can effectively remove > 99.8% of the H2S present in simulated synthesis gas generated from the gasification of black liquor. This level of sulfur removal was consistent over simulated synthesis gas mixtures that contained from 6 to 9.5 vol % H2S.A significant amount of the sulfur in the simulated syngas was recovered as SO2 during regeneration. The average recovery of sulfur as SO2 was about 75%. Because these are first cycle results, this sulfur recovery is expected to improve. Developed WINGems model of the process.The total decrease in variable operating costs for the BLG process compared to the HERB was in excess of $6,200,000 per year for a mill producing 350,000 tons of pulp per year. This represents a decrease in operating cost of about $17.7/ton of oven dry pulp produced. There will be additional savings in labor and maintenance cost that has not been taken into account. The capital cost for the MSSAQ based gasifier system was estimated at $164,000,000, which is comparable to a High Efficiency Recovery Boiler. The return on investment was estimated at 4%. A gasifier replacement cannot be justified on its own, however if the recovery boiler needs to be replaced the MSSAQ gasifier system shows significantly higher savings. Before black liquor based gasifer technology can be commercialized more work is necessary. The recovery of the absorbed sulfur in the absorbent as sulfur dioxide is only 75%. This needs to be greater than 90% for economical operation. It has been suggested that as the number of cycles is increased the sulfur dioxide recovery might improve. Further research is necessary. Even though a significant amount of work has been done on a pilot scale gasifiers using liquors containing sulfur, both at low and high temperatures the lack of a commercial unit is an impediment to the implementation of the MSSAQ technology. The implementation of a commercial unit needs to be facilated before the benefits of

Hasan Jameel, North Carolina State University; Adrianna Kirkman, North Carolina State University; Ravi Chandran,Thermochem Recovery International Brian Turk Research Triangle Institute; Brian Green, Research Triangle Institute

2010-01-27T23:59:59.000Z

452

Integration of the Mini-Sulfide Sulfite Anthraquinone (MSS-AQ) Pulping Process and Black Liquor Gasification in a Pulp Mill  

SciTech Connect

As many of the recovery boilers and other pieces of large capital equipment of U.S. pulp mills are nearing the end of their useful life, the pulp and paper industry will soon need to make long-term investments in new technologies. The ability to install integrated, complete systems that are highly efficient will impact the industry’s energy use for decades to come. Developing a process for these new systems is key to the adoption of state-of-the-art technologies in the Forest Products industry. This project defined an integrated process model that combines mini-sulfide sulfite anthraquinone (MSS-AQ) pulping and black liquor gasification with a proprietary desulfurization process developed by the Research Triangle Institute. Black liquor gasification is an emerging technology that enables the use of MSS-AQ pulping, which results in higher yield, lower bleaching cost, lower sulfur emissions, and the elimination of causticization requirements. The recently developed gas cleanup/absorber technology can clean the product gas to a state suitable for use in a gas turbine and also regenerate the pulping chemicals needed to for the MSS-AQ pulping process. The combination of three advanced technologies into an integrated design will enable the pulping industry to achieve a new level of efficiency, environmental performance, and cost savings. Because the three technologies are complimentary, their adoption as a streamlined package will ensure their ability to deliver maximum energy and cost savings benefits. The process models developed by this project will enable the successful integration of new technologies into the next generation of chemical pulping mills. When compared to the Kraft reference pulp, the MSS-AQ procedures produced pulps with a 10-15 % yield benefit and the ISO brightness was 1.5-2 times greater. The pulp refined little easier and had a slightly lower apparent sheet density (In both the cases). At similar levels of tear index the MSS-AQ pulps also produced a comparable tensile and burst index pulps. Product gas composition determined using computer simulations The results demonstrate that RVS-1 can effectively remove > 99.8% of the H2S present in simulated synthesis gas generated from the gasification of black liquor. This level of sulfur removal was consistent over simulated synthesis gas mixtures that contained from 6 to 9.5 vol % H2S.A significant amount of the sulfur in the simulated syngas was recovered as SO2 during regeneration. The average recovery of sulfur as SO2 was about 75%. Because these are first cycle results, this sulfur recovery is expected to improve. Developed WINGems model of the process.The total decrease in variable operating costs for the BLG process compared to the HERB was in excess of $6,200,000 per year for a mill producing 350,000 tons of pulp per year. This represents a decrease in operating cost of about $17.7/ton of oven dry pulp produced. There will be additional savings in labor and maintenance cost that has not been taken into account. The capital cost for the MSSAQ based gasifier system was estimated at $164,000,000, which is comparable to a High Efficiency Recovery Boiler. The return on investment was estimated at 4%. A gasifier replacement cannot be justified on its own, however if the recovery boiler needs to be replaced the MSSAQ gasifier system shows significantly higher savings. Before black liquor based gasifer technology can be commercialized more work is necessary. The recovery of the absorbed sulfur in the absorbent as sulfur dioxide is only 75%. This needs to be greater than 90% for economical operation. It has been suggested that as the number of cycles is increased the sulfur dioxide recovery might improve. Further research is necessary. Even though a significant amount of work has been done on a pilot scale gasifiers using liquors containing sulfur, both at low and high temperatures the lack of a commercial unit is an impediment to the implementation of the MSSAQ technology. The implementation of a commercial unit needs to be facilated before the benefits of

Hasan Jameel, North Carolina State University; Adrianna Kirkman, North Carolina State University; Ravi Chandran,Thermochem Recovery International Brian Turk Research Triangle Institute; Brian Green, Research Triangle Institute

2010-01-27T23:59:59.000Z

453

Enhanced Hydrogen Production Integrated with CO2 Separation in a Single-Stage Reactor  

DOE Green Energy (OSTI)

Hydrogen production from coal gasification can be enhanced by driving the equilibrium limited Water Gas Shift reaction forward by incessantly removing the CO{sub 2} by-product via the carbonation of calcium oxide. This project aims at using the OSU patented high-reactivity mesoporous precipitated calcium carbonate sorbent for removing the CO{sub 2} product. Preliminary experiments demonstrate the show the superior performance of the PCC sorbent over other naturally occurring calcium sorbents. Gas composition analyses show the formation of 100% pure hydrogen. Novel calcination techniques could lead to smaller reactor footprint and single-stage reactors that can achieve maximum theoretical H{sub 2} production for multicyclic applications. Sub-atmospheric calcination studies reveal the effect of vacuum level, diluent gas flow rate, thermal properties of the diluent gas and the sorbent loading on the calcination kinetics which play an important role on the sorbent morphology. Steam, which can be easily separated from CO{sub 2}, is envisioned to be a potential diluent gas due to its enhanced thermal properties. Steam calcination studies at 700-850 C reveal improved sorbent morphology over regular nitrogen calcination. A mixture of 80% steam and 20% CO{sub 2} at ambient pressure was used to calcine the spent sorbent at 820 C thus lowering the calcination temperature. Regeneration of calcium sulfide to calcium carbonate was achieved by carbonating the calcium sulfide slurry by bubbling CO{sub 2} gas at room temperature.

Mahesh Iyer; Himanshu Gupta; Danny Wong; Liang-Shih Fan

2005-09-30T23:59:59.000Z

454

Hydrogen-selective membrane  

DOE Patents (OSTI)

A hydrogen-selective membrane comprises a tubular porous ceramic support having a palladium metal layer deposited on an inside surface of the ceramic support. The thickness of the palladium layer is greater than about 10 {micro}m but typically less than about 20 {micro}m. The hydrogen permeation rate of the membrane is greater than about 1.0 moles/m{sup 2} s at a temperature of greater than about 500 C and a transmembrane pressure difference of about 1,500 kPa. Moreover, the hydrogen-to-nitrogen selectivity is greater than about 600 at a temperature of greater than about 500 C and a transmembrane pressure of about 700 kPa. Hydrogen can be separated from a mixture of gases using the membrane. The method may include the step of heating the mixture of gases to a temperature of greater than about 400 C and less than about 1000 C before the step of flowing the mixture of gases past the membrane. The mixture of gases may include ammonia. The ammonia typically is decomposed to provide nitrogen and hydrogen using a catalyst such as nickel. The catalyst may be placed inside the tubular ceramic support. The mixture of gases may be supplied by an industrial process such as the mixture of exhaust gases from the IGCC process. 9 figs.

Collins, J.P.; Way, J.D.

1997-07-29T23:59:59.000Z

455

Hot Hydrogen Test Facility  

DOE Green Energy (OSTI)

The core in a nuclear thermal rocket will operate at high temperatures and in hydrogen. One of the important parameters in evaluating the performance of a nuclear thermal rocket is specific impulse, ISp. This quantity is proportional to the square root of the propellant’s absolute temperature and inversely proportional to square root of its molecular weight. Therefore, high temperature hydrogen is a favored propellant of nuclear thermal rocket designers. Previous work has shown that one of the life-limiting phenomena for thermal rocket nuclear cores is mass loss of fuel to flowing hydrogen at high temperatures. The hot hydrogen test facility located at the Idaho National Lab (INL) is designed to test suitability of different core materials in 2500°C hydrogen flowing at 1500 liters per minute. The facility is intended to test non-uranium containing materials and therefore is particularly suited for testing potential cladding and coating materials. In this first installment the facility is described. Automated Data acquisition, flow and temperature control, vessel compatibility with various core geometries and overall capabilities are discussed.

W. David Swank

2007-02-01T23:59:59.000Z

456

Hydrogen-Selective Membrane  

SciTech Connect

A hydrogen-selective membrane comprises a tubular porous ceramic support having a palladium metal layer deposited on an inside surface of the ceramic support. The thickness of the palladium layer is greater than about 10 .mu.m but typically less than about 20 .mu.m. The hydrogen permeation rate of the membrane is greater than about 1.0 moles/m.sup.2.s at a temperature of greater than about 500.degree. C. and a transmembrane pressure difference of about 1,500 kPa. Moreover, the hydrogen-to-nitrogen selectivity is greater than about 600 at a temperature of greater than about 500.degree. C. and a transmembrane pressure of about 700 kPa. Hydrogen can be separated from a mixture of gases using the membrane. The method may include the step of heating the mixture of gases to a temperature of greater than about 400.degree. C. and less than about 1000.degree. C. before the step of flowing the mixture of gases past the membrane. The mixture of gases may include ammonia. The ammonia typically is decomposed to provide nitrogen and hydrogen using a catalyst such as nickel. The catalyst may be placed inside the tubular ceramic support. The mixture of gases may be supplied by an industrial process such as the mixture of exhaust gases from the IGCC process.

Collins, John P. (Boulder, CO); Way, J. Douglas (Boulder, CO)

1995-09-19T23:59:59.000Z

457

Hydrogen-selective membrane  

DOE Patents (OSTI)

A hydrogen-selective membrane comprises a tubular porous ceramic support having a palladium metal layer deposited on an inside surface of the ceramic support. The thickness of the palladium layer is greater than about 10 .mu.m but typically less than about 20 .mu.m. The hydrogen permeation rate of the membrane is greater than about 1.0 moles/m.sup.2. s at a temperature of greater than about 500.degree. C. and a transmembrane pressure difference of about 1,500 kPa. Moreover, the hydrogen-to-nitrogen selectivity is greater than about 600 at a temperature of greater than about 500.degree. C. and a transmembrane pressure of about 700 kPa. Hydrogen can be separated from a mixture of gases using the membrane. The method may include the step of heating the mixture of gases to a temperature of greater than about 400.degree. C. and less than about 1000.degree. C. before the step of flowing the mixture of gases past the membrane. The mixture of gases may include ammonia. The ammonia typically is decomposed to provide nitrogen and hydrogen using a catalyst such as nickel. The catalyst may be placed inside the tubular ceramic support. The mixture of gases may be supplied by an industrial process such as the mixture of exhaust gases from the IGCC process.

Collins, John P. (Boulder, CO); Way, J. Douglas (Boulder, CO)

1997-01-01T23:59:59.000Z

458

Magnetic liquefier for hydrogen  

DOE Green Energy (OSTI)

This document summarizes work done at the Astronautics Technology Center of the Astronautics Corporation of America (ACA) in Phase 1 of a four phase program leading to the development of a magnetic liquefier for hydrogen. The project involves the design, fabrication, installation, and operation of a hydrogen liquefier providing significantly reduced capital and operating costs, compared to present liquefiers. To achieve this goal, magnetic refrigeration, a recently developed, highly efficient refrigeration technology, will be used for the liquefaction process. Phase 1 project tasks included liquefier conceptual design and analysis, preliminary design of promising configurations, design selection, and detailed design of the selected design. Fabrication drawings and vendor specifications for the selected design were completed during detailed design. The design of a subscale, demonstration magnetic hydrogen liquefier represents a significant advance in liquefaction technology. The cost reductions that can be realized in hydrogen liquefaction in both the subscale and, more importantly, in the full-scale device are expected to have considerable impact on the use of liquid hydrogen in transportation, chemical, and electronic industries. The benefits to the nation from this technological advance will continue to have importance well into the 21st century.

NONE

1992-12-31T23:59:59.000Z

459

Hydrogen Optical Fiber Sensors  

DOE Green Energy (OSTI)

Optically-based hydrogen sensors promise to deliver an added level of safety as hydrogen and fuel cell technologies enter the mainstream. More importantly, they offer reduced power consumption and lower cost, which are desirable for mass production applications such as automobiles and consumer appliances. This program addressed two of the major challenges previously identified in porous optrode-based optical hydrogen sensors: sensitivity to moisture (ambient humidity), and interference from the oxygen in air. Polymer coatings to inhibit moisture and oxygen were developed in conjunction with newer and novel hydrogen sensing chemistries. The results showed that it is possible to achieve sensitive hydrogen detection and rapid response with minimal interference from oxygen and humidity. As a result of this work, a new and more exciting avenue of investigation was developed: the elimination of the porous optrode and deposition of the sensor chemistry directly into the polymer film. Initial results have been promising, and open up a wider range of potential applications from extended optical fiber sensing networks, to simple plastic "stickers" for use around the home and office.

Lieberman, Robert A.; Beshay, Manal; Cordero, Steven R.

2008-07-28T23:59:59.000Z

460

Hydrogen in semiconductors  

DOE Green Energy (OSTI)

After an incubation'' period in the 1970's and early 80's, during which the first hydrogen related centers were discovered and characterized in ultra-pure germanium, a sharp increase of research activity occurred after the discovery of shallow acceptor passivation in crystalline silicon. The aim of this review is to convey an insight into the rich, multifaceted physics and materials science which has emerged from the vast variety of experimental and theoretical studies of hydrogen in semiconductors. In order to arrive at the current understanding of hydrogen related phenomena in a logical way, each chapter will start with a brief review of the major experimental and theoretical advances of the past few years. Those who are interested to learn more about this fascinating area of semiconductor research are referred to reviews, to a number of conference proceedings volumes, and to an upcoming book which will contain authoritative chapters on most aspects of hydrogen in crystalline semiconductors. Some of the early art of semiconductor device processing can finally be put on a scientific foundation and new ways of arriving at advanced device structures begin to use what we have learned from the basic studies of hydrogen in semiconductors. 92 refs., 8 figs.

Haller, E.E. (California Univ., Berkeley, CA (USA) Lawrence Berkeley Lab., CA (USA))

1990-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "h2s hydrogen sulfide" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Water's Hydrogen Bond Strength  

E-Print Network (OSTI)

Water is necessary both for the evolution of life and its continuance. It possesses particular properties that cannot be found in other materials and that are required for life-giving processes. These properties are brought about by the hydrogen bonded environment particularly evident in liquid water. Each liquid water molecule is involved in about four hydrogen bonds with strengths considerably less than covalent bonds but considerably greater than the natural thermal energy. These hydrogen bonds are roughly tetrahedrally arranged such that when strongly formed the local clustering expands, decreasing the density. Such low density structuring naturally occurs at low and supercooled temperatures and gives rise to many physical and chemical properties that evidence the particular uniqueness of liquid water. If aqueous hydrogen bonds were actually somewhat stronger then water would behave similar to a glass, whereas if they were weaker then water would be a gas and only exist as a liquid at sub-zero temperatures. The overall conclusion of this investigation is that water's hydrogen bond strength is poised centrally within a narrow window of its suitability for life.

Martin Chaplin

2007-06-10T23:59:59.000Z

462

Hydrogen-selective membrane  

DOE Patents (OSTI)

A hydrogen-selective membrane comprises a tubular porous ceramic support having a palladium metal layer deposited on an inside surface of the ceramic support. The thickness of the palladium layer is greater than about 10 {micro}m but typically less than about 20 {micro}m. The hydrogen permeation rate of the membrane is greater than about 1.0 moles/m{sup 2}s at a temperature of greater than about 500 C and a transmembrane pressure difference of about 1,500 kPa. Moreover, the hydrogen-to-nitrogen selectivity is greater than about 600 at a temperature of greater than about 500 C and a transmembrane pressure of about 700 kPa. Hydrogen can be separated from a mixture of gases using the membrane. The method may include the step of heating the mixture of gases to a temperature of greater than about 400 C and less than about 1000 C before the step of flowing the mixture of gases past the membrane. The mixture of gases may include ammonia. The ammonia typically is decomposed to provide nitrogen and hydrogen using a catalyst such as nickel. The catalyst may be placed inside the tubular ceramic support. The mixture of gases may be supplied by an industrial process such as the mixture of exhaust gases from the IGCC process. 9 figs.

Collins, J.P.; Way, J.D.

1995-09-19T23:59:59.000Z

463

FCT Hydrogen Delivery: Current Technology  

NLE Websites -- All DOE Office Websites (Extended Search)

Current Technology to someone Current Technology to someone by E-mail Share FCT Hydrogen Delivery: Current Technology on Facebook Tweet about FCT Hydrogen Delivery: Current Technology on Twitter Bookmark FCT Hydrogen Delivery: Current Technology on Google Bookmark FCT Hydrogen Delivery: Current Technology on Delicious Rank FCT Hydrogen Delivery: Current Technology on Digg Find More places to share FCT Hydrogen Delivery: Current Technology on AddThis.com... Home Basics Current Technology R&D Activities Quick Links Hydrogen Production Hydrogen Storage Fuel Cells Technology Validation Manufacturing Codes & Standards Education Systems Analysis Contacts Current Technology Today, hydrogen is transported from the point of production to the point of use via pipeline, over the road in cryogenic liquid trucks or gaseous tube

464

Hydrogen Pathway Cost Distributions  

NLE Websites -- All DOE Office Websites (Extended Search)

Pathway Cost Distributions Pathway Cost Distributions Jim Uihlein Fuel Pathways Integration Tech Team January 25, 2006 2 Outline * Pathway-Independent Cost Goal * Cost Distribution Objective * Overview * H2A Influence * Approach * Implementation * Results * Discussion Process * Summary 3 Hydrogen R&D Cost Goal * Goal is pathway independent * Developed through a well defined, transparent process * Consumer fueling costs are equivalent or less on a cents per mile basis * Evolved gasoline ICE and gasoline-electric hybrids are benchmarks * R&D guidance provided in two forms * Evolved gasoline ICE defines a threshold hydrogen cost used to screen or eliminate options which can't show ability to meet target * Gasoline-electric hybrid defines a lower hydrogen cost used to prioritize projects for resource allocation

465

Hydrogen recycling: fundamental processes  

DOE Green Energy (OSTI)

The recycling of hydrogen at the interior surfaces of plasma devices is an important and largely uncontrolled process at present. There remain important questions concerning the fundamental processes involved in recycling phenomena and the material dependence of these pocesses. A primary aim of the fundamental studies should be to develop sufficient understanding of the influence of materials properties on hydrogen recycling so that the materials and machine operating conditions can be selected to give maximum control of hydrogen recycling. In addition, realistic models of the wall behavior under recycling conditions need to be developed. Such modeling goes hand-in-hand with both fundamental process studies and in situ measurements, and may provide sufficient overall understanding of the influence of recycling on machine operation to impact design decisions effecting such important processes as impurity control, plasma, fueling, and pulse length.

Picraux, S.T.

1979-01-01T23:59:59.000Z

466

Hydrogen vehicle fueling station  

DOE Green Energy (OSTI)

The authors describe a hydrogen vehicle fueling station that receives and stores hydrogen in liquid form and dispenses it either as a liquid or compressed gas. The economics that accrue from the favorable weight and volume advantages of liquid hydrogen support this concept both now and probably for some time to come. The model for liquid transfer to a 120-liter vehicle tank shows that transfer times under five minutes are feasible with pump-assisted transfer, or for pressure transfer with subcooling greater than 1 K. The model for compressed gas transfer shows that underfilling of nearly 30% can occur during rapid filling. Cooling the fill gas to 214 K completely eliminates underfilling.

Daney, D.E.; Edeskuty, F.J.; Daugherty, M.A.; Prenger, F.C.; Hill, D.D.

1995-09-01T23:59:59.000Z

467

Hydrogen production from microbial strains  

SciTech Connect

The present invention is directed to a method of screening microbe strains capable of generating hydrogen. This method involves inoculating one or more microbes in a sample containing cell culture medium to form an inoculated culture medium. The inoculated culture medium is then incubated under hydrogen producing conditions. Once incubating causes the inoculated culture medium to produce hydrogen, microbes in the culture medium are identified as candidate microbe strains capable of generating hydrogen. Methods of producing hydrogen using one or more of the microbial strains identified as well as the hydrogen producing strains themselves are also disclosed.

Harwood, Caroline S; Rey, Federico E

2012-09-18T23:59:59.000Z

468

New Materials for Hydrogen Pipelines  

NLE Websites -- All DOE Office Websites (Extended Search)

OAK OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY New Materials for Hydrogen Pipelines New Materials for Hydrogen Pipelines Barton Smith, Barbara Frame, Cliff Eberle, Larry Anovitz, James Blencoe and Tim Armstrong Oak Ridge National Laboratory Jimmy Mays University of Tennessee, Knoxville Hydrogen Pipeline Working Group Meeting August 30-31, 2005 Augusta, Georgia 2 OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY Overview Overview - - Barriers and Technical Targets Barriers and Technical Targets * Barriers to Hydrogen Delivery - Existing steel pipelines are subject to hydrogen embrittlement and are inadequate for widespread H 2 distribution. - Current joining technology (welding) for steel pipelines is major cost factor and can exacerbate hydrogen embrittlement issues.

469

Energy Basics: Hydrogen and Fuel Cell Technologies  

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

EERE: Energy Basics Hydrogen and Fuel Cell Technologies Photo of a woman scientist using a machine that is purifying biological catalysts for hydrogen production. Hydrogen is the...

470

Fuel Cell Technologies Office: Hydrogen Storage  

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

| Consumer Information Hydrogen Storage Search Search Help Hydrogen Storage EERE Fuel Cell Technologies Office Hydrogen Storage Printable Version Share this resource Send...

471

Fuel Cell Technologies Office: Hydrogen Delivery  

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

| Consumer Information Hydrogen Delivery Search Search Help Hydrogen Delivery EERE Fuel Cell Technologies Office Hydrogen Delivery Printable Version Share this resource...

472

NREL: Hydrogen and Fuel Cells Research - Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Projects NREL's hydrogen and fuel cell research projects focus on developing, integrating, and demonstrating advanced hydrogen production, hydrogen storage, and fuel cell...

473

Energy Basics: Hydrogen and Fuel Cell Technologies  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydrogen Fuel Fuel Cells Hydropower Ocean Solar Wind Hydrogen and Fuel Cell...

474

Hunterston Hydrogen Ltd | Open Energy Information  

Open Energy Info (EERE)

Hunterston Hydrogen Ltd Jump to: navigation, search Name Hunterston Hydrogen Ltd Place Anglesey, United Kingdom Zip LL65 4RJ Sector Hydro, Hydrogen, Wind energy Product Developing...

475

Renewable Hydrogen From Wind in California  

E-Print Network (OSTI)

wind energy electrolytic hydrogen fueling station. Proposaland Their  Suitability for Hydrogen Production in the Area” September  2004, Hydrogen and Fuel Cells Conference 

Bartholomy, Obadiah

2005-01-01T23:59:59.000Z

476

An Integrated Hydrogen Vision for California  

E-Print Network (OSTI)

Hydrogen Production, National Renewable Energy Laboratory,new renewable energy development for hydrogen production,of renewable sources of energy for hydrogen production;

Lipman, Timothy; Kammen, Daniel; Ogden, Joan; Sperling, Dan

2004-01-01T23:59:59.000Z

477

The Market Potential for Electrolytic Hydrogen  

Science Conference Proceedings (OSTI)

Analyzes the small-user hydrogen market. Improvements in current electrolyzer technology may make electrolytic hydrogen competitive with purchased (merchant)