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1

anhydrous hydrogen fluoride: Topics by E-print Network  

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

effect of Hydrogen Booster System on exhaust gases emissions of an internal combustion engine. The hydrogen booster produces hydrogen and oxygen using six water fuel cells and...

2

ELECTRONIC SOLUTION SPECTRA FOR URANIUM AND NEPTUNIUM IN OXIDATION STATES (III) TO (VI) IN ANHYDROUS HYDROGEN FLUORIDE  

SciTech Connect (OSTI)

Spectra have been recorded for solutions in anhydrous hydrogen fluoride (AHF) of uranium and neptunium in oxidation states (III) to (VI). The spectra for U(III), Np(III) and Np(IV) in AHF are very similar to those in acidified aqueous solution, but that for U(IV) suggests that the cationic species is UF{sub 2}{sup 2+}. The AHF spectra for the elements in oxidation states (V) and (VI) are not comparable with those of the formally analogous aqueous solutions, where the elements exist as well-defined dioxo-cations. However, the AHF spectra can be related to spectra in the gas phase, in the solid state or in non-aqueous solvents for each element in its appropriate oxidation state.

Baluka, M.; Edelstein, N.; O'Donnell, T. A.

1980-10-01T23:59:59.000Z

3

Proposed replacement and operation of the anhydrous hydrogen fluoride supply and fluidized-bed reactor system at Building 9212. Draft environmental assessment  

SciTech Connect (OSTI)

The US Department of Energy (DOE) proposes to replace the existing anhydrous hydrogen fluoride (AHF) supply and fluidized-bed reactor systems for the Weapons Grade Highly Enriched Uranium Chemical Recovery and Recycle Facility, Building 9212, which is Iocated within the Y-12 Plant on DOE`s Oak Ridge Reservation in Oak Ridge, Tennessee. The current AHF supply and fluidized-bed reactor systems were designed and constructed more than 40 years ago. Because of their deteriorating condition, the corrosive nature of the materials processed, and the antiquated design philosophy upon which they are based, their long-term reliability cannot be assured. The current AHF supply system cannot mitigate an accidental release of AHF and vents fugitive AHF directly to the atmosphere during operations. the proposed action would reduce the risk of exposing the Y-12 Plant work force, the public, and the environment to an accidental release of AHF and would ensure the continuing ability of the Y-12 Plant to manufacture highly enriched uranium metal and process uranium from retired weapons for storage.

NONE

1995-03-01T23:59:59.000Z

4

Proposed replacement and operation of the anhydrous hydrogen fluoride supply and fluidized-bed chemical processing systems at Building 9212, Y-12 Plant, Oak Ridge, Tennessee  

SciTech Connect (OSTI)

The US Department of Energy (DOE) proposes to replace the existing anhydrous hydrogen fluoride (AHF) supply and fluidized-bed reactor systems for the Weapons Grade Highly Enriched Uranium Chemical Recovery and Recycle Facility, Building 9212, which is located within the Y-12 Plant on DOE`s Oak Ridge Reservation in Oak Ridge, Tennessee. The proposed replacement system would be based upon modern design criteria and safety analyses. The replacement AHF supply and distribution system equipment would be located on the existing Dock 8/8A at Building 9212. Utilities would be extended to the dock to service the process equipment. The following process equipment modules would be prefabricated for installation at the modified dock: an AHF cylinder enclosure, an AHF supply manifold and vaporizer module, an AHF sump tank and transfer skid, and an AHF supply off-gas scrubber assembly module. The fluidized-bed reactor system would be constructed in an area adjacent to the existing system in Building 9212. The replacement equipment would consist of a new reduction fluidized-bed reactor, a hydrofluorination fluidized-bed reactor, and associated air emission control equipment. The no-action alternative, which is the continued operation of the existing AHF supply and fluidized-bed reactor systems, was also evaluated.

NONE

1995-09-01T23:59:59.000Z

5

Vapor-liquid equilibria for the systems difluoromethane + hydrogen fluoride, dichlorodifluoromethane + hydrogen fluoride, and chlorine + hydrogen fluoride  

SciTech Connect (OSTI)

Isothermal vapor-liquid equilibria for difluoromethane + hydrogen fluoride, dichlorodifluoromethane + hydrogen fluoride, and chlorine + hydrogen fluoride have been measured. The experimental data for the binary systems are correlated with the NRTL equation with the vapor-phase association model for the mixtures containing hydrogen fluoride, and the relevant parameters are presented. The binary system difluoromethane + hydrogen fluoride forms a homogeneous liquid phase, and the others form minimum boiling heterogeneous azeotropes at the experimental conditions.

Kang, Y.W. [KIST, Seoul (Korea, Republic of). Div. of Environmental and CFC Technology] [KIST, Seoul (Korea, Republic of). Div. of Environmental and CFC Technology

1998-01-01T23:59:59.000Z

6

PREPARATION OF ANHYDROUS F-18 FLUORIDE, T. Tewson. Journal of Labelled Compounds and Radiopharmaceuticals S165; 52, Supplement 1 2009  

SciTech Connect (OSTI)

The original specific aims of the grant where cut back considerably as the study section reduced both the time and the budget for the project. The objective of the grant was to show that fluorine-18 fluoride could be prepared completely anhydrous and thus substantially more reactive than conventionally dried fluoride using the method of Sun and DiMagno. This method involved using conventionally dried fluoride to prepare an aromatic fluoride in which the aromatic ring is substituted with electron withdrawing groups. The aryl fluoride is then dried and purified and the fluoride is displaced with an anhydrous nucleophile. Using fluorine-19 and macroscopic scale reactions the reactions work well and give anhydrous fluoride salts that are both more reactive and more selective in their reactions than conventionally dried fluoride. The original substrate chosen for the reaction was bromopentacyanobenzene (1). This compound proved to be easy to make but very hard to purify. As an alternative hexabromobenzene, which is commercially available in high purity, was tried. This reacted cleanly with conventionally dried F-18 fluoride in acetonitrile to give [{sup 18}F]-fluoropentabromobenzene (2), which could be dried by passage of the solution over alumina, which also removed any unreacted fluoride. The fluorine-18 fluoride could be liberated from (2) by displacement with an anhydrous nucleophilic tetra-alkylammonium salt but the anion had to be chosen with considerable care. The reaction is potentially reversible especially as, on the no carrier added scale, there is inevitably an excess of hexabromobenzene and so the displacing nucleophile is chosen to deactivate the aromatic compound to further nucleophilic displacement reactions. To this end tetrabutylammonium azide and tetrabutylammonium phenolate have been tried. Both work but the phenolate is probably the better choice. The F-18 fluoride produced by this process is substantially more reactive than conventionally dried fluoride. A solution of the 3'-anhydrothymidine-5-benzoate (3) was added to the fluoride solution and 30% of the fluoride was incorporated in less than 3 minutes at room temperature were as conventionally dried fluoride requires 10 minutes at 160 C and gives {approx}10% incorporation. These results are encouraging in that they show that the objective of truly anhydrous fluoride is worth pursuing but the problem is that you end up with too much 'stuff' in the solution. Four to five milligrams of hexabromobenzene are used for the initial fluorination reaction and enough of the tetra-alkylammonium salt has to be added to react with a substantial number of those bromides. No attempt has been made to optimize these amounts but there is clearly a lot of material in the solution before the final substrate is added. To avoid these difficulties experiments involving a different, low boiling carrier of the fluoride which can be distilled from the initial fluorination mixture have been tried. Phenyltrifluoromethane sulfonate reacts with fluoride to give trifluoromethane sulfonyl fluoride which boils at -20 C as shown. This reaction works with conventionally dried fluorine-18 fluoride and the no carrier added trifluoromethane sulphonyl fluoride distills out of the reaction as it forms. The choice of nucleophile to react it with to liberate the fluoride is limited and the obvious choice is tetrabutylammonium azide as the resulting trifluoromethane sulfonyl azide is unreactive. We have shown that this works in principle but the experimental details have not been explored.

Tewson, T.

2009-07-01T23:59:59.000Z

7

Chemical emergency preparedness and prevention advisory: Hydrogen fluoride, series 8, No. 3  

SciTech Connect (OSTI)

The advisory recommends ways Local Emergency Planning Committees (LEPCs) and chemical facilities can reduce risks posed by the presence of hydrogen fluoride (HF) in their communities. Hydrogen fluoride, a strong inorganic acid, is produced and used as a gas or liquid without water (i.e., in anhydrous form), or in a water (aqueous) solution. Inhalation of hydrogen fluoride vapor, either in anhydrous form or from water solutions, can cause irritation if the exposure is mild (i.e., low concentration in air for a short time), or severe damage to the respiratory system or death in the case of exposure to high concentrations. Contact with the liquid or vapor can severely burn the skin, eyes, and other tissue. The largest use of hydrogen fluoride is in the manufacture of fluorine-containing chemicals, particularly chlorofluorocarbons (CFCs). Hydrogen fluoride may be used in some petroleum refinery operations, aluminum production, nuclear applications, glass etching and polishing, and metal treating and cleaning. Hydrogen fluoride's acute toxicity prompted EPA to list it as an extremely hazardous substance (EHS), with a threshold planning quantity (TPQ) of 100 pounds, under Section 302 of the Emergency Planning and Community Right-to-Know Act (commonly known as SARA Title III).

Not Available

1993-07-01T23:59:59.000Z

8

Isothermal vapor-liquid equilibria for the systems 1-chloro-1,1-difluoroethane + hydrogen fluoride, 1,1-dichloro-1-fluoroethane + hydrogen fluoride, and chlorodifluoromethane + hydrogen fluoride  

SciTech Connect (OSTI)

Isothermal vapor-liquid equilibria for the three binary systems (1-chloro-1,1-difluoroethane + hydrogen fluoride, 1,1-dichloro-1-fluoroethane + hydrogen fluoride, and chlorodifluoromethane + hydrogen fluoride) have been measured. The experimental data for the binary systems are correlated with the NRTL equation with the vapor-phase association model for the mixtures containing hydrogen fluoride, and the relevant parameters are presented. All of the systems form minimum boiling heterogeneous azeotropes.

Kang, Y.W.; Lee, Y.Y. [KIST, Seoul (Korea, Republic of)] [KIST, Seoul (Korea, Republic of)

1997-03-01T23:59:59.000Z

9

Determination of Stability Constants of Hydrogen and Aluminum Fluorides with a Fluoride-Selective Electrode  

SciTech Connect (OSTI)

The ability to directly determine free fluoride ion concentration (or mean activity) simplifies gathering and interpretation of experimental data for studies of metal complexes. In this work, the new lanthanum fluoride electrode was used to measure free fluoride ion in an investigation of the hydrogen-fluoride and aluminum-fluoride systems in NH4NO3.

Baumann, E.W.

2003-01-06T23:59:59.000Z

10

anhydrous hydrogen peroxide: Topics by E-print Network  

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

with diesel. Main focus of this research is to investigate the performance of diesel engine by injecting hydrogen peroxide as blends with diesel at 2%, 5% and 10 %...

11

Process for converting magnesium fluoride to calcium fluoride  

DOE Patents [OSTI]

This invention is a process for the conversion of magnesium fluoride to calcium fluoride whereby magnesium fluoride is decomposed by heating in the presence of calcium carbonate, calcium oxide or calcium hydroxide. Magnesium fluoride is a by-product of the reduction of uranium tetrafluoride to form uranium metal and has no known commercial use, thus its production creates a significant storage problem. The advantage of this invention is that the quality of calcium fluoride produced is sufficient to be used in the industrial manufacture of anhydrous hydrogen fluoride, steel mill flux or ceramic applications.

Kreuzmann, A.B.; Palmer, D.A.

1984-12-21T23:59:59.000Z

12

Kinetics of the reactions of hydrogen fluoride with calcium oxide  

SciTech Connect (OSTI)

This paper studies the kinetics of interaction of gaseous hydrogen fluoride with calcium oxide at temperatures 300-700 degrees. The experiments were conducted in a laboratory adsorption apparatus modified and adapted for work with corrosive hydrogen fluoride. Calcium oxide samples in granulated form and deposited on gamma-alumina were used in the experiments. Kinetic curves representing variations of the degree of conversion of the solid samples with time are shown. The influence of retardation dure to diffusion was observed in the experiments. The influence of diffusion control on the reaction rate was also observed in a study of the reaction kinetics on supported layers of calcium oxide.

Kossaya, A.M.; Belyakov, B.P.; Kuchma, Z.V.; Sandrozd, M.K.; Vasil'eva, V.G.

1986-08-01T23:59:59.000Z

13

Spectrophotometric determination of hydrogen peroxide in the presence of fluoride  

SciTech Connect (OSTI)

A simple, rapid method was required for the determination of 0.01 - 0.1M hydrogen peroxide in the presence of 10M HF and in solutions resulting from the dissolution of unirradiated nuclear fuel elements in this dissolvent. Fluoride is a serious interference in the classical spectrophotometric procedure for determining hydrogen peroxide as the yellow-colored Ti(IV)-peroxide complex. It was thought that this interference could be minimized by the addition of a fluoride-complexing metal ion. Zirconium, aluminum, and boron were studied at various metal ion to fluoride mole ratios to determine the optimum conditions for reducing the interference by fluoride when present at the 0.015M and 0.15M levels. All three were effective in reducing the interference, but only at a metal ion to fluoride ratio of one or greater. Although zirconium was the most effective complexer studied, an excess of ZR(IV) decreased the absorbance of the Ti(IV)-peroxide complex. Since excess aluminum does not interfere, a procedure was developed in which two moles of AI(III) are added for each mole of fluoride in the sample aliquot. The color develops rapidly at room temperature and is stable for at least 24 hours. The absorbance is linear over the range 1 {times} 10{sup {minus}4}M to 1.8 {times} 10-{sup {minus}3}M H{sub 2}O{sub 2} when measured in 1-cm cuvettes. The method tolerates a variety of metal ions and complexing agents at the 0.02M level.

Delmastro, J.R.

1991-07-08T23:59:59.000Z

14

The system ammonium fluoride-hydrogen fluoride-water at zero degrees centigrade and at minus twenty degrees centigrade  

E-Print Network [OSTI]

borate formed s1nce the boric acid itself is so weak that it has no measurable effect upon the hydrogen ion concentration. The 1ndicator recommended is brom cresol green and the reactions are: + NHs + HsBOs ? y NHg + HsBO3 HsO+ + HsBOs ? } Hs...ately neutralizes the hydrogen fluoride in the sample and prevents loss from reac- tion with the glass . The flask is then made up to volume. b) 50 milliliters each of saturated aqueous boric acid solution and distilled water are poured into a 500-ml...

Buettner, John Philip

1961-01-01T23:59:59.000Z

15

Thermodynamics of the conversion of calcium and magnesium fluorides to the parent metal oxides and hydrogen fluoride  

SciTech Connect (OSTI)

The authors have used thermodynamic modeling to examine the reaction of calcium fluoride (CaF{sub 2}) and magnesium fluoride (MgF{sub 2}) with water (H{sub 2}O) at elevated temperatures. The calculated, equilibrium composition corresponds to the global free-energy minimum for the system. Optimum, predicted reaction temperatures and reactant mole ratios are reported for the recovery of hydrogen fluoride (HF), a valuable industrial feedstock. Complete conversion of MgF{sub 2} is found at 1,000 C and a ratio of 40 moles of H{sub 2}O per 1 mole of MgF{sub 2}. For CaF{sub 2}, temperatures as high as 1,400 C are required for complete conversion at a corresponding mole ratio of 40 moles of H{sub 2}O per 1 mole of CaF{sub 2}. The authors discuss the presence of minor chemical constituents as well as the stability of various potential container materials for the pyrohydrolysis reactions at elevated temperatures. CaF{sub 2} and MgF{sub 2} slags are available as wastes at former uranium production facilities within the Department of Energy Complex and other facilities regulated by the Nuclear Regulatory Commission. Recovery of HF from these wastes is an example of environmental remediation at such facilities.

West, M.H.; Axler, K.M.

1997-02-01T23:59:59.000Z

16

E-Print Network 3.0 - anhydrous carbamazepine polymorphic Sample...  

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

France Beurre (Quimper, France... (hydrogenated coconut oil, refined coconut oil, refined palm oil or anhydrous milk fat) and emulsifier (SMDG... was similar for hydrogenated...

17

Development and demonstration of a personal monitoring system for exposure to hydrogen fluoride. Final report  

SciTech Connect (OSTI)

A good, functional Hydrogen Fluoride Gasbadge dosimeter has been developed for sampling of airborne HF vapor. The device is small (7.7 cm {times} 5.4 cm {times} 1.9 cm) and can easily and conveniently be worn on one`s lapel. It consists of polyethylene and polypropylene parts and a triethanolamine-impregnated polyproylene collection element. It is completely self contained, requiring no pumps, impingers, or sampling tubes. Subsequent to sampling, the collection element is analyzed quickly and easily with a fluoride selective-ion electrode. Laboratory tests were conducted to determine precision, linearity, interference effects, influences of temperature and humidity, and collection element stability over time. Results of the tests indicate that the Abcor Gasbadge HF dosimeter is an excellent passive HF monitor for work spaces, and that results obtained with it are accurate within {plus_minus}25%. These results have been corroborated in a field study.

Young, M.S.; Monat, J.P.

1993-09-01T23:59:59.000Z

18

Liquid-liquid equilibria for hydrogen fluoride + 1,1-dichloro-1-fluoroethane + 1-chloro-1,1-difluoroethane at {minus}20 and 20 C  

SciTech Connect (OSTI)

1,1-Dichloro-1-fluoroethane is presently under consideration as a replacement for trichlorofluoromethane, which is widely used as a foam blowing agent. 1-Chloro-1,1-difluoroethane is the major raw material for the production of poly(vinylidene fluoride). These two materials are normally manufactured by the fluorination of 1,1,1-trichloroethane or vinylidene chloride with hydrogen fluoride. A phase separator is normally used to retrieve hydrogen fluoride from the product stream. To design the phase separator, liquid-liquid equilibrium data are required. Liquid-liquid equilibria for the ternary system (hydrogen fluoride + 1,1-dichloro-1-fluoroethane + 1-chloro-1,1-difluoroethane) have been measured at {minus}20 and 20 C. The results are correlated with the NRTL model, and the relevant parameters are presented.

Kang, Y.W.; Lee, Y.Y. [KIST, Seoul (Korea, Republic of). CFC Alternatives Technology Center

1995-03-01T23:59:59.000Z

19

Chemistry control and corrosion mitigation of heat transfer salts for the fluoride salt reactor (FHR)  

SciTech Connect (OSTI)

The Molten Salt Reactor Experiment (MSRE) was a prototype nuclear reactor which operated from 1965 to 1969 at Oak Ridge National Laboratory. The MSRE used liquid fluoride salts as a heat transfer fluid and solvent for fluoride based {sup 235}U and {sup 233}U fuel. Extensive research was performed in order to optimize the removal of oxide and metal impurities from the reactor's heat transfer salt, 2LiF-BeF{sub 2} (FLiBe). This was done by sparging a mixture of anhydrous hydrofluoric acid and hydrogen gas through the FLiBe at elevated temperatures. The hydrofluoric acid reacted with oxides and hydroxides, fluorinating them while simultaneously releasing water vapor. Metal impurities such as iron and chromium were reduced by hydrogen gas and filtered out of the salt. By removing these impurities, the corrosion of reactor components was minimized. The Univ. of Wisconsin - Madison is currently researching a new chemical purification process for fluoride salts that make use of a less dangerous cleaning gas, nitrogen trifluoride. Nitrogen trifluoride has been predicted as a superior fluorinating agent for fluoride salts. These purified salts will subsequently be used for static and loop corrosion tests on a variety of reactor materials to ensure materials compatibility for the new FHR designs. Demonstration of chemistry control methodologies along with potential reduction in corrosion is essential for the use of a fluoride salts in a next generator nuclear reactor system. (authors)

Kelleher, B. C.; Sellers, S. R.; Anderson, M. H.; Sridharan, K.; Scheele, R. D. [Dept. of Engineering Physics, Univ.of Wisconsin - Madison, 1500 Engineering Drive, Madison, WI 53706 (United States)

2012-07-01T23:59:59.000Z

20

Does fluoride disrupt hydrogen bond network in cationic lipid bilayer? Time-dependent fluorescence shift of Laurdan and molecular dynamics simulations  

SciTech Connect (OSTI)

Time-dependent fluorescence shift (TDFS) of Laurdan embedded in phospholipid bilayers reports on hydration and mobility of the phospholipid acylgroups. Exchange of H{sub 2}O with D{sub 2}O prolongs the lifetime of lipid-water and lipid-water-lipid interactions, which is reflected in a significantly slower TDFS kinetics. Combining TDFS measurements in H{sub 2}O and D{sub 2}O hydrated bilayers with atomistic molecular dynamics (MD) simulations provides a unique tool for characterization of the hydrogen bonding at the acylgroup level of lipid bilayers. In this work, we use this approach to study the influence of fluoride anions on the properties of cationic bilayers composed of trimethylammonium-propane (DOTAP). The results obtained for DOTAP are confronted with those for neutral phosphatidylcholine (DOPC) bilayers. Both in DOTAP and DOPC H{sub 2}O/D{sub 2}O exchange prolongs hydrogen-bonding lifetime and does not disturb bilayer structure. These results are confirmed by MD simulations. TDFS experiments show, however, that for DOTAP this effect is cancelled in the presence of fluoride ions. We interpret these results as evidence that strongly hydrated fluoride is able to steal water molecules that bridge lipid carbonyls. Consequently, when attracted to DOTAP bilayer, fluoride disrupts the local hydrogen-bonding network, and the differences in TDFS kinetics between H{sub 2}O and D{sub 2}O hydrated bilayers are no longer observed. A distinct behavior of fluoride is also evidenced by MD simulations, which show different lipid-ion binding for Cl{sup ?} and F{sup ?}.

Pokorna, Sarka; Jurkiewicz, Piotr; Hof, Martin, E-mail: martin.hof@jh-inst.cas.cz [J. Heyrovský Institute of Physical Chemistry of the Academy of Sciences of the Czech Republic v.v.i., Dolejskova 3, 18223 Prague 8 (Czech Republic); Vazdar, Mario [Division of Organic Chemistry and Biochemistry, Rudjer Boškovi? Institute, P.O.B. 180, HR-10002 Zagreb (Croatia); Cwiklik, Lukasz [J. Heyrovský Institute of Physical Chemistry of the Academy of Sciences of the Czech Republic v.v.i., Dolejskova 3, 18223 Prague 8 (Czech Republic); Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Prague 6 (Czech Republic); Jungwirth, Pavel [Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Prague 6 (Czech Republic); Department of Physics, Tampere University of Technology, P.O. Box 692, FI-33101 Tampere (Finland)

2014-12-14T23:59:59.000Z

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

Divalent fluoride doped cerium fluoride scintillator  

DOE Patents [OSTI]

The use of divalent fluoride dopants in scintillator materials comprising cerium fluoride is disclosed. The preferred divalent fluoride dopants are calcium fluoride, strontium fluoride, and barium fluoride. The preferred amount of divalent fluoride dopant is less than about two percent by weight of the total scintillator. Cerium fluoride scintillator crystals grown with the addition of a divalent fluoride have exhibited better transmissions and higher light outputs than crystals grown without the addition of such dopants. These scintillators are useful in radiation detection and monitoring applications, and are particularly well suited for high-rate applications such as positron emission tomography (PET).

Anderson, David F. (630 Sylvan Pl., Batavia, IL 60510); Sparrow, Robert W. (28 Woodlawn Dr., Sturbridge, MA 01566)

1991-01-01T23:59:59.000Z

22

E-Print Network 3.0 - acid nitrosyl fluoride Sample Search Results  

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

nitrosyl hydride CN cyanide radical HF hydrogen fluoride hydrogen ion* carbon monoxide ion sulfur monoxide... with 8 atoms HCCN acetic acid methyl formate methyl radical*...

23

Method of treating fluoride contaminated wastes  

SciTech Connect (OSTI)

A method for treating spent aluminum smelting potliner material containing fluoride contaminants is described which comprises: adding silica to the material to form a mixture thereof; elevating the temperature of the mixture within the range of 1,000/sup 0/ to 1,700/sup 0/C. to form a slag; providing sufficient silica in the mixture and forming the slag in the presence of sufficient water for pyrohydrolysis conditions resulting in the volatilization of substantially all of the fluoride contaminants mostly in the form of hydrogen fluoride; and cooling the slag remaining after volatilizatiion of substantially all of the fluoride contaminants to produce an insoluble silicate glass-residue containing any remaining portion of the fluoride contaminants in an immobile state.

Davis, P.K.; Kakaria, V.K.

1988-04-05T23:59:59.000Z

24

A Review Of Water Contents Of Nominally Anhydrous Natural Minerals...  

Open Energy Info (EERE)

Water Contents Of Nominally Anhydrous Natural Minerals In The Mantles Of Earth, Mars And The Moon Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal...

25

The synthesis, characterization and reactivity of high oxidation state nickel fluorides  

SciTech Connect (OSTI)

The research described in this thesis has mainly addressed the challenge of the synthesis of thermodynamically unstable nickel fluorides, which cannot be made by traditional thermal methods. A low-temperature approach towards the synthesis of such transition metal fluorides exploits the greater thermodynamic stability of high oxidation states in anions and involves the use of anhydrous hydrogen fluoride (aHF) as a solvent. The general method consists of combining an aHF soluble starting material (e.g., K{sub 2}NiF{sub 6}) with a Lewis fluoroacid (e.g., BF{sub 3}), which precipitates a neutral polymeric solid state fluoride: 2 K{sup +} + NiF{sub 6}{sup 2{minus}} + BF{sub 3} {r_arrow} NiF{sub 4} + 2 BF{sub 4}{sup {minus}} + 2 K{sup +}. At room temperature, this reaction yields a different structural phase, with composition K{sub x}NiF{sub 3} (x {approx} 0.18). This material has a pseudo-hexagonal tungsten bronze structure (H{sub 0}-K{sub x}NiF{sub 3}), and is an ionic conductor, probably due to K{sup +} ions hosted in the lattice channels. R-NiF{sub 3} is capable of fluorinating a wide range of inorganic and organic substrates. These reactions have probably shed light on the mechanism of the Simons Electrochemical Fluorination (ECF) Process, an important industrial method of fluorinating organic compounds. It has long been speculated that NiF{sub 3} plays a role in the ECF process, which uses nickel electrodes in aHF solvent. K{sub 2}NiF{sub 6} also fluorinates organic compounds in aHF, but interestingly, yields different fluorinated products. The reduction of R-NiF{sub 3} and K{sub 2}NiF{sub 6} during fluorination reactions yields NiF{sub 2}. A method has been developed to regenerate NiF{sub 6}{sup 2{minus}} from NiF{sub 2}.

Chacon, L.C. [Univ. of Berkeley, CA (United States). Dept. of Chemistry]|[Lawrence Berkeley National Lab., CA (United States). Chemical Sciences Div.

1997-12-01T23:59:59.000Z

26

Compact anhydrous HCl to aqueous HCl conversion system  

DOE Patents [OSTI]

The present invention is directed to an inexpensive and compact apparatus adapted for use with a .sup.196 Hg isotope separation process and the conversion of anhydrous HCl to aqueous HCl without the use of air flow to carry the HCl vapor into the converter system.

Grossman, Mark W. (Belmont, MA); Speer, Richard (S. Hamilton, MA)

1993-01-01T23:59:59.000Z

27

Calculated structures and fluoride affinities for fluorides  

SciTech Connect (OSTI)

It is shown that SCF-MO calculations provide good estimates of the energies of the processes MF/sub n/ ..-->.. M/sup n+/ + nF/sup -/ where M/sup n+/ is an ion of a first- or second-row element in a closed-shell or s/sup 2/ configuration. The fluoride ion affinities are then calculated for a number of molecules and ions. Where comparison with experiment is possible, the agreement is generally good when allowance is made for experimental uncertainties. In favorable cases, accurate heats of formation may be calculated from fluoride affinities.

O'Keeffe, M.

1986-07-23T23:59:59.000Z

28

Method of synthesis of anhydrous thorium(IV) complexes  

SciTech Connect (OSTI)

Method of producing anhydrous thorium(IV) tetrahalide complexes, utilizing Th(NO.sub.3).sub.4(H.sub.2O).sub.x, where x is at least 4, as a reagent; method of producing thorium-containing complexes utilizing ThCl.sub.4(DME).sub.2 as a precursor; method of producing purified ThCl.sub.4(ligand).sub.x compounds, where x is from 2 to 9; and novel compounds having the structures: ##STR00001##

Kiplinger, Jaqueline L; Cantat, Thibault

2013-04-30T23:59:59.000Z

29

Method for the recovery of fluorides from spent aluminum potlining and the production of an environmentally safe waste residue  

SciTech Connect (OSTI)

A method for recovery of fluoride values from spent potlining and fluoride containing insulating materials associated with the potlining is disclosed. Spent potlining and the insulating matericals are reduced to a fine particle size and incinerated. The ash residue is leached with a dilute caustic and the leachate is treated with a calcium compound to precipitate calcium fluoride. The calcium fluoride is dried to a moisture content of less than 0.1 percent and is treated with about 93 to 99 percent concentration of sulfuric acid to produce hydrogen fluoride gas and a metal sulfate. The hydrogen fluoride gas is fed into an alumina dry scrubber to produce alumina with absorbed fluorides to be used as feed material to reduction cells used in the manufacture of aluminum by electrolytic reduction. The metal sulfate residue is treated with lime and constitutes an environmentally safe product which can be disposed of as landfill material.

Snodgrass, J.B.; Cambridge, E.L.

1984-04-24T23:59:59.000Z

30

Synthesis, structure, and reactivity of high oxidation state silver fluorides and related compounds  

SciTech Connect (OSTI)

This thesis has been largely concerned with defining the oxidizing power of Ag(III) and Ag(II) in anhydrous hydrogen fluoride (aHF) solution. Emphasis was on cationic species, since in a cation the electronegativity of a given oxidation state is greatest. Cationic Ag(III) solv has a short half life at ordinary temperatures, oxidizing the solvent to elemental fluorine with formation of Ag(II). Salts of such a cation have not yet been preparable, but solutions which must contain such a species have proved to be effective and powerful oxidizers. In presence of PtF{sub 6}{sup {minus}}, RuF{sub 6}{sup {minus}}, or RhF{sub 6}{sup {minus}}, Ag(III) solv effectively oxidizes the anions to release the neutral hexafluorides. Such reactivity ranks cationic Ag(III) as the most powerfully oxidizing chemical agent known as far. Unlike its trivalent relative Ag (II) solv is thermodynamically stable in acid aHF. Nevertheless, it oxidizes IrF{sub 6}{sup {minus}} to IrF{sub 6} at room temperature, placing its oxidizing potential not more than 2 eV below that of cationic Ag(III). Range of Ag{sup 2+} (MF{sub 6}{sup {minus}}){sub 2} salts attainable in aHF has been explored. An anion must be stable with respect to electron loss to Ag{sup 2+}. The anion must also be a poor F{sup {minus}} donor; otherwise, either AgF{sup +} salts or AgF{sub 2} are generated.

Lucier, G.M.

1995-05-01T23:59:59.000Z

31

Magnesium fluoride recovery method  

DOE Patents [OSTI]

A method of obtaining magnesium fluoride substantially free from radioactive uranium from a slag containing the same and having a radioactivity level of at least about 7000 pCi/gm. The slag is ground to a particle size of about 200 microns or less. The ground slag is contacted with an acid under certain prescribed conditions to produce a liquid product and a particulate solid product. The particulate solid product is separated from the liquid and treated at least two more times with acid to produce a solid residue consisting essentially of magnesium fluoride substantially free of uranium and having a residual radioactivity level of less than about 1000 pCi/gm. In accordance with a particularly preferred embodiment of the invention a catalyst and an oxidizing agent are used during the acid treatment and preferably the acid is sulfuric acid having a strength of about 1.0 Normal.

Gay, Richard L. (Canoga Park, CA); McKenzie, Donald E. (Woodland Hills, CA)

1989-01-01T23:59:59.000Z

32

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

E-Print Network [OSTI]

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

McBee, George G

1956-01-01T23:59:59.000Z

33

Sol-gel synthesis of high-quality heavy-metal fluoride glasses  

SciTech Connect (OSTI)

Fluoride glasses are excellent laser hosts and are very well suited for a broad spectrum of optical applications. However, current fluoride glass synthesis is expensive. The sol-gel method is an affordable alternative for producing high-performance, optical-quality heavy-metal fluoride glasses. The method involves forming a hydrous oxide gel of the constituent metal alkoxides and salts, polymerizing the solution to form a gel, fluorinating the gel with anhydrous HF, melting the amorphous material in an oxidizing atmosphere of SF[sub 6], and casting the melt into desired shapes. ZBLA (57ZrF[sub 4] [times] 36BaF[sub 2] [times] 4LaF[sub 3] [times] 3AlF[sub 3], in mol%) and Nd-doped (0.3 mol%) ZBLA glass rods were prepared by this process and their properties were measured. The sol-gel-based glasses had thermal and optical properties similar to those found in the literature for conventionally prepared fluorides.

Dejneka, M.; Riman, R.E.; Snitzer, E. (Rutgers, The State Univ. of New Jersey, Piscataway, NJ (United States). Dept. of Ceramics)

1993-12-01T23:59:59.000Z

34

E-Print Network 3.0 - anhydrous rare earth Sample Search Results  

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

rare earth Search Powered by Explorit Topic List Advanced Search Sample search results for: anhydrous rare earth Page: << < 1 2 3 4 5 > >> 1 An assessment of the amount and types...

35

Nuclear spin relaxation in a vinylidene fluoride and trifluoroethylene copolymer (70/30).  

E-Print Network [OSTI]

583 Nuclear spin relaxation in a vinylidene fluoride and trifluoroethylene copolymer (70/30). II orientations dans les chaînes. Abstract. 2014 Measurements of the hydrogen and fluorine nuclear spin-lattice relaxation times T1 from 6 to 300 MHz and T103C1 from 3 to 100 kHz have been performed at different

Boyer, Edmond

36

Methods of using ionic liquids having a fluoride anion as solvents  

DOE Patents [OSTI]

A method in one embodiment includes contacting a strongly hydrogen bonded organic material with an ionic liquid having a fluoride anion for solubilizing the strongly hydrogen bonded organic material; and maintaining the ionic liquid at a temperature of about 90.degree. C. or less during the contacting. A method in another embodiment includes contacting a strongly hydrogen bonded organic material with an ionic liquid having an acetate or formate anion for solubilizing the strongly hydrogen bonded organic material; and maintaining the ionic liquid at a temperature of less than about 90.degree. C. during the contacting.

Pagoria, Philip (Livermore, CA); Maiti, Amitesh (San Ramon, CA); Gash, Alexander (Brentwood, CA); Han, Thomas Yong (Pleasanton, CA); Orme, Christine (Oakland, CA); Fried, Laurence (Livermore, CA)

2011-12-06T23:59:59.000Z

37

Fluoride removal from water with spent catalyst  

SciTech Connect (OSTI)

The adsorption of fluoride from water with spent catalyst was studied. Adsorption density of fluoride decreased with increasing pH. Linear adsorption isotherm was utilized to describe the adsorption reaction. The adsorption was a first-order reaction, and the rate constant increased with decreasing surface loading. Adsorption reaction of fluoride onto spent catalyst was endothermic, and the reaction rate increased slightly with increasing temperature. Fluoro-alumino complex and free fluoride ion were involved in the adsorption reaction. It is proposed that both the silica and alumina fractions of spent catalyst contribute to the removal of fluoride from aqueous solution. Coulombic interaction is proposed as the major driving force of the adsorption reaction of fluoride onto spent catalyst.

Lai, Y.D.; Liu, J.C. [National Taiwan Institute of Technology, Taipei (Taiwan, Province of China)

1996-12-01T23:59:59.000Z

38

Polyvinylidene Fluoride-Based Membranes for Direct Methanol Fuel...  

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

Polyvinylidene Fluoride-Based Membranes for Direct Methanol Fuel Cell Applications Polyvinylidene Fluoride-Based Membranes for Direct Methanol Fuel Cell Applications Presentation...

39

Method of making porous ceramic fluoride  

SciTech Connect (OSTI)

A process is disclosed for making a porous ceramic composite where fumed silica particles are coated with a nitrate, preferably aluminum nitrate. Next the nitrate is converted to an oxide and formed into a desired configuration. This configuration is heated to convert the oxide to an oxide silicate which is then react with HF, resulting in the fluoride ceramic, preferably aluminum fluoride.

Reiner, R.H.; Holcombe, C.E.

1990-11-13T23:59:59.000Z

40

Method of making porous ceramic fluoride  

DOE Patents [OSTI]

A process for making a porous ceramic composite where fumed silica particles are coated with a nitrate, preferably aluminum nitrate. Next the nitrate is converted to an oxide and formed into a desired configuration. This configuration is heated to convert the oxide to an oxide silicate which is then react with HF, resulting in the fluoride ceramic, preferably aluminum fluoride.

Reiner, Robert H. (Knoxville, TN); Holcombe, Cressie E. (Farragut, TN)

1990-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

Current status of fluoride volatility method development  

SciTech Connect (OSTI)

The Fluoride Volatility Method is based on a separation process, which comes out from the specific property of uranium, neptunium and plutonium to form volatile hexafluorides whereas most of fission products (mainly lanthanides) and higher transplutonium elements (americium, curium) present in irradiated fuel form nonvolatile tri-fluorides. Fluoride Volatility Method itself is based on direct fluorination of the spent fuel, but before the fluorination step, the removal of cladding material and subsequent transformation of the fuel into a powdered form with a suitable grain size have to be done. The fluorination is made with fluorine gas in a flame fluorination reactor, where the volatile fluorides (mostly UF{sub 6}) are separated from the non-volatile ones (trivalent minor actinides and majority of fission products). The subsequent operations necessary for partitioning of volatile fluorides are the condensation and evaporation of volatile fluorides, the thermal decomposition of PuF{sub 6} and the finally distillation and sorption used for the purification of uranium product. The Fluoride Volatility Method is considered to be a promising advanced pyrochemical reprocessing technology, which can mainly be used for the reprocessing of oxide spent fuels coming from future GEN IV fast reactors.

Uhlir, J.; Marecek, M.; Skarohlid, J. [UJV - Nuclear Research Institute, Research Centre Rez, CZ-250 68 Husinec - Rez 130 (Czech Republic)

2013-07-01T23:59:59.000Z

42

Removal of fluoride from aqueous nitric acid  

SciTech Connect (OSTI)

Several methods for removing fluoride from aqueous nitric acid were investigated and compared with the frequently used aluminum nitrate-calcium nitrate (Ca/sup 2 +/-Al/sup 3 +/) chemical trap-distillation system. Zirconium oxynitrate solutions were found to be superior in preventing volatilization of fluoride during distillation of the nitric acid, producing decontamination factors (DFs) on the order of 2 x 10/sup 3/ (vs approx. 500 for the Ca/sup 2 +/-Al/sup 3 +/ system). Several other metal nitrate systems were tested, but they were less effective. Alumina and zirconia columns proved highly effective in removing HF from HF-HNO/sub 3/ vapors distilled through the columns; fluoride DFs on the order of 10/sup 6/ and 10/sup 4/, respectively, were obtained. A silica gel column was very effective in adsorbing HF from HF-HNO/sub 3/ solutions, producing a fluoride DF of approx. 10/sup 4/.

Pruett, D.J.; Howerton, W.B.; Mailen, J.C.

1981-06-01T23:59:59.000Z

43

Sulfuryl fluoride in the global atmosphere  

E-Print Network [OSTI]

The first calibrated high-frequency, high-precision, in situ atmospheric and archived air measurements of the fumigant sulfuryl fluoride (SO[subscript 2]F[subscript 2]) have been made as part of the Advanced Global Atmospheric ...

Muhle, J.

44

Transition metal fluorides: from superconductors to multiferroics.   

E-Print Network [OSTI]

Transition metal fluorides represent an important family of complex solids displaying a variety of different properties and interesting phenomena. Despite their remarkable behaviour, these classes of materials have not ...

Drathen, Christina

2013-06-29T23:59:59.000Z

45

Methods of Controlling Hydrogen Fluoride Pressure During Chemical...  

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

by the absorber during growth of YBa2Cu3O7 (YBCO). Technology Marketing Summary Superconductors are remarkable materials that transmit direct current without resistive loss and...

46

Hydrogen Fluoride Capture by Imidazolium Acetate Ionic Liquid  

E-Print Network [OSTI]

Extraction of hydrofluoric acid (HF) from oils is a drastically important problem in petroleum industry, since HF causes quick corrosion of pipe lines and brings severe health problems to humanity. Some ionic liquids (ILs) constitute promising scavenger agents thanks to strong binding to polar compounds and tunability. PM7-MD simulations and hybrid density functional theory are employed here to consider HF capture ability of ILs. Discussing the effects and impacts of the cation and the anion separately and together, I will evaluate performance of imidazolium acetate and outline systematic search guidelines for efficient adsorption and extraction of HF.

Chaban, Vitaly

2015-01-01T23:59:59.000Z

47

Low temperature cold trapping of uranium hexafluoride containing hydrogen fluoride  

SciTech Connect (OSTI)

The use of a freezer-sublimer system operating at low desublimation pressures to replace 10-in. nuclearly safe cold traps for low assay (<5% U-235) uranium hexafluoride (UF{sub 6}) would significantly simplify operations and is economically attractive provided the nuclear safety of the system can be assured. A major requirement of such assurance is the availability of conditions guaranteeing that the nuclear safety design criterion, which requires that the H/U atomic ratio in the condensate in the freezer-sublimer always be less than 0.33 for assays up to 5%, will never be violated. A general vapor pressure equation giving the vapor pressure of HF-UF{sub 6} solutions as a function of temperature and mole fraction UF{sub 6} has been developed. The precision of the data at the 95% confidence level is {plus minus}0.1 torr at temperatures between {minus}100{degree}F and {minus}121{degree}F. The calculated vapor pressure of pure HF is 4.6 torr at {minus}100{degree}F and 3.1 torr at {minus}108{degree}F. Theoretical considerations suggest that the true value will be slightly lower. In experimental studies of the cold trapping operation at {minus}108{degree}F and at a trap pressure of 2.2 torr, only 7.3% of the HF entering the trap was retained in the trap. At a trap pressure of 4.6 torr, over 80% of the HF entering the trap was retained. The data obtained in this study confirms that the physical chemistry of the HF-UF{sub 6} system previously developed accurately describes the behavior of the system and that so long as the pressure in the trap is maintained below the vapor pressure of pure HF at the trap temperatures, there is no way that sufficient HF can be trapped to give an H/U ratio of 0.33 regardless of the HF/UF{sub 6} ratio in the feed to the trap. 5 refs., 4 tabs.

Hobbs, W.E.; Barber, E.J.; Jones, C.G.

1990-10-01T23:59:59.000Z

48

Method for removing fluoride contamination from nitric acid  

SciTech Connect (OSTI)

Fluoride ions are removed from nitric acid solution by contacting the vaporized solution with alumina or zirconium.

Howerton, W.B.; Pruett, D.J.

1982-07-13T23:59:59.000Z

49

Florida Hydrogen Initiative  

SciTech Connect (OSTI)

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

50

BAND STRUCTURE AND OPTICAL PROPERTIES OF MAGNESIUM FLUORIDE  

E-Print Network [OSTI]

595 BAND STRUCTURE AND OPTICAL PROPERTIES OF MAGNESIUM FLUORIDE C. JOUANIN, J. P. ALBERT and C'autres transitions expéri- mentales. Abstract. 2014 The electronic band structure of magnesium fluoride is calculated, only some qualitative investigations exist for the calcium and magnesium fluorides [1, 2]. This lack

Paris-Sud XI, Université de

51

Uranyl fluoride luminescence in acidic aqueous solutions  

SciTech Connect (OSTI)

Luminescence emission spectra and decay rates are reported for uranyl species in acidic aqueous solutions containing HF or added NaF. The longest luminescence lifetime, 0.269 {+-} 0.006 ms, was observed from uranyl in 1 M HF + 1 M HClO{sub 4} at 296 K and decreased with increasing temperature. Based on a luminescence dynamics model that assumes equilibrium among electronically excited uranyl fluoride species and free fluoride ion, this long lived uranyl luminescence in aqueous solution is attributed primarily to UO{sub 2}F{sub 2}. Studies on the effect of added LiNO{sub 3} or Na{sub 2}WO{sub 4}{center_dot}2H{sub 2}O showed relatively weak quenching of uranyl fluoride luminescence which suggests that high sensitivity determination of the UF{sub 6} content of WF{sub 6} gas should be feasible via uranyl luminescence analysis of hydrolyzed gas samples of impure WF{sub 6}.

Beitz, J.V.; Williams, C.W. [Argonne National Lab., IL (United States). Chemistry Div.

1996-08-01T23:59:59.000Z

52

Aluminum fluoride inhibition of glucocorticoid receptor inactivation and transformation  

SciTech Connect (OSTI)

Fluoride, in the presence of aluminum ions, reversibly inhibits the temperature-mediated inactivation of unoccupied glucocorticoid receptors in cytosol preparations from mouse L cells. The effect is concentration-dependent, with virtually complete stabilization of specific glucocorticoid-binding capacity at 2 mM fluoride and 100 microM aluminum. These concentrations of aluminum and fluoride are ineffective when used separately. Aluminum fluoride also stabilizes receptors toward inactivation by gel filtration and ammonium sulfate precipitation. Aluminum fluoride prevents temperature-dependent transformation of steroid-receptor complexes to the DNA-binding state. Aluminum fluoride does not inhibit calf intestine alkaline phosphatase, and unoccupied receptors inactivated by this enzyme in the presence of aluminum fluoride can be completely reactivated by dithiothreitol. The effects of aluminum fluoride are due to stabilization of the complex between the glucocorticoid receptor and the 90-kDa mammalian heat-shock protein hsp90, which suggests that aluminum fluoride interacts directly with the receptor. Endogenous thermal inactivation of receptors in cytosol is not accompanied by receptor dephosphorylation. However, inactivation is correlated with dissociation of hsp90 from the unoccupied receptor. These results support the proposal that hsp90 is required for the receptor to bind steroid and dissociation of hsp90 is sufficient to inactivate the unoccupied receptor.

Housley, P.R. (Univ. of South Carolina School of Medicine, Columbia (USA))

1990-04-10T23:59:59.000Z

53

Examination of Liquid Fluoride Salt Heat Transfer  

SciTech Connect (OSTI)

The need for high efficiency power conversion and energy transport systems is increasing as world energy use continues to increase, petroleum supplies decrease, and global warming concerns become more prevalent. There are few heat transport fluids capable of operating above about 600oC that do not require operation at extremely high pressures. Liquid fluoride salts are an exception to that limitation. Fluoride salts have very high boiling points, can operate at high temperatures and low pressures and have very good heat transfer properties. They have been proposed as coolants for next generation fission reactor systems, as coolants for fusion reactor blankets, and as thermal storage media for solar power systems. In each case, these salts are used to either extract or deliver heat through heat exchange equipment, and in order to design this equipment, liquid salt heat transfer must be predicted. This paper discusses the heat transfer characteristics of liquid fluoride salts. Historically, heat transfer in fluoride salts has been assumed to be consistent with that of conventional fluids (air, water, etc.), and correlations used for predicting heat transfer performance of all fluoride salts have been the same or similar to those used for water conventional fluids an, water, etc). A review of existing liquid salt heat transfer data is presented, summarized, and evaluated on a consistent basis. Less than 10 experimental data sets have been found in the literature, with varying degrees of experimental detail and measured parameters provided. The data has been digitized and a limited database has been assembled and compared to existing heat transfer correlations. Results vary as well, with some data sets following traditional correlations; in others the comparisons are less conclusive. This is especially the case for less common salt/materials combinations, and suggests that additional heat transfer data may be needed when using specific salt eutectics in heat transfer equipment designs. All of the data discussed above were taken under forced convective conditions (both laminar and turbulent). Some recent data taken at ORNL under free convection conditions are also presented and results discussed. This data was taken using a simple crucible experiment with an instrumented nickel heater inserted in the salt to induce natural circulation within the crucible. The data was taken over a temperature range of 550oC to 650oC in FLiNaK salt. This data covers both laminar and turbulent natural convection conditions, and is compared to existing forms of natural circulation correlations.

Yoder Jr, Graydon L [ORNL] [ORNL

2014-01-01T23:59:59.000Z

54

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

55

FLUORIDE ION COMPLEXATION BY STIBONIUM LEWIS ACIDSTOWARD APPLICATION IN BIOIMAGING  

E-Print Network [OSTI]

, these antimony species react with fluoride ions in organic solvents and sometimes in aqueous solutions to form the corresponding fluorostiboranes. Formation of these fluoride species can be conveniently monitored by a variety of techniques such as UV-vis and NMR...

Haile, Merid 1989-

2011-05-06T23:59:59.000Z

56

Scintillation of rare earth doped fluoride nanoparticles  

SciTech Connect (OSTI)

The scintillation response of rare earth (RE) doped core/undoped (multi-)shell fluoride nanoparticles was investigated under x-ray and alpha particle irradiation. A significant enhancement of the scintillation response was observed with increasing shells due: (i) to the passivation of surface quenching defects together with the activation of the REs on the surface of the core nanoparticle after the growth of a shell, and (ii) to the increase of the volume of the nanoparticles. These results are expected to reflect a general aspect of the scintillation process in nanoparticles, and to impact radiation sensing technologies that make use of nanoparticles.

Jacobsohn, L. G.; McPherson, C. L.; Sprinkle, K. B.; Ballato, J. [Center for Optical Materials Science and Engineering Technologies (COMSET), and School of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634 (United States); Yukihara, E. G. [Physics Department, Oklahoma State University, Stillwater, Oklahoma 74078-3072 (United States); DeVol, T. A. [Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, South Carolina 29634-0905 (United States)

2011-09-12T23:59:59.000Z

57

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

58

Liquid Hydrogen Delivery - Strategic Directions for Hydrogen...  

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

Liquid Hydrogen Delivery - Strategic Directions for Hydrogen Delivery Workshop Liquid Hydrogen Delivery - Strategic Directions for Hydrogen Delivery Workshop Targets, barriers and...

59

Butane segregated by fluorides, olefins content at Texas terminals  

SciTech Connect (OSTI)

Texas Eastern Products Pipeline Co., Houston (Teppco), this month has begun segregating butane streams at the company's Mont Belvieu and Baytown, Texas terminals according to fluoride and olefin contents. Streams containing fluoride or an olefin content greater than 1 ppm (or both) currently flow into Teppco's south Mont Belvieu terminal. Those fluoride-free streams with less than 1 ppm of olefins flow to its north Mont Belvieu terminal. Butane processed through an isomerization unit yields isobutane, a key component in MTBE. But high-fluoride butane from crude-oil refineries using hydrofluoric (HF) acid alkylation units cannot be used to produce MTBE because fluoride will damage isomerization units' process catalysts. Olefins also affect the efficiency of isomerization units, but less critically than fluorides. Their presence is higher in refinery product than in fractionated NGL. To extend the life of their process catalysts and to maximize yields, producers (including MTBE and isomerization unit operators) are specifying low-fluoride butanes developed from natural-gas fractionators or from refineries that do not use an HF process.

Not Available

1993-03-22T23:59:59.000Z

60

Effects of fluoride emissions on enzyme activity in metabolism of agricultural plants  

SciTech Connect (OSTI)

The effects of fluoride on the activity of malatedehydrogenase (MDH) in rape seed and rye grass have been investigated. Fluoride, which has been absorbed from the air, seems to act differently from fluoride added to the soil. The action of airborne fluoride compounds resorbed by the plant on the activity of MDH significantly correlated with the distance from an aluminum plant, crop yield, and fluoride content. 5 references, 5 figures, 2 tables.

Moeri, P.B.

1980-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

Nitrogen Trifluoride-Based Fluoride- Volatility Separations Process: Initial Studies  

SciTech Connect (OSTI)

This document describes the results of our investigations on the potential use of nitrogen trifluoride as the fluorinating and oxidizing agent in fluoride volatility-based used nuclear fuel reprocessing. The conceptual process uses differences in reaction temperatures between nitrogen trifluoride and fuel constituents that produce volatile fluorides to achieve separations and recover valuable constituents. We provide results from our thermodynamic evaluations, thermo-analytical experiments, kinetic models, and provide a preliminary process flowsheet. The evaluations found that nitrogen trifluoride can effectively produce volatile fluorides at different temperatures dependent on the fuel constituent.

McNamara, Bruce K.; Scheele, Randall D.; Casella, Andrew M.; Kozelisky, Anne E.

2011-09-28T23:59:59.000Z

62

Hydrogen Analysis  

Broader source: Energy.gov [DOE]

Presentation on Hydrogen Analysis to the DOE Systems Analysis Workshop held in Washington, D.C. July 28-29, 2004 to discuss and define role of systems analysis in DOE Hydrogen Program.

63

Nuclear Hydrogen  

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

Hydrogen High temperature options for nuclear generation of hydrogen on a commercial basis are several years in the future. Thermo-chemical water splitting has been proven to be...

64

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.

65

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

66

The system silver fluoride - hydrogen fluoride - water at zero degrees centigrade and at minus fifteen degrees centigrade  

E-Print Network [OSTI]

samples from the acid&ass titraticna vere filtered J ' through veigbed fritted glass filter oruclbles~ snd washed with 1 . V 0. 01 I nitrio aoid and vator. %e oruoiblee vere then dried in aa, oven eot at 140 for fogr bcnua, plaoed in a vaomsa... . . and Coupons, Xeu Tork (1952) ~ 'I g 16 I l \\ 1 I ( v' 4 o Al Figure 1 AHF-HF-HFO At 0 C, Figure 2 AHP-HP-H2G At -15 G. o b0 ID III IS Cw IS ...

Thomas, Hiram Jack

2012-06-07T23:59:59.000Z

67

The system sodium fluoride - hydrogen fluoride - water at zero degrees centigrade and at minus fifteen degrees centigrade  

E-Print Network [OSTI]

. R. , Inst. Obschei i ~lteor . ~him. , 1, 55-$9, (1954) ~ 2. T e, I. V. J ur I ~AI'ed ahe istry, U. . 8. R. II, 214-222, (1~5~ Tananaev, I. V. , Nikolaev, N. S. , and Buslaev, Y. A. , Zhur ~Neor . Khim. t 1, 274-2Rl (1956). 4. T e, I. V. J? I A...~lied ah~eietr, U. 8. 8. S. , ~1, 1018-28 6174ET. 5. Clark, George L. , J. Am. Chem. Soc. , 41, 1477 (1910). 6. HI, J. H. , Pl 'ne ~he 1 t (11) p. 27, Ao d i Press 61950) N~rk. 7. JU, A. :i. d"-dya. H. , J 1*f~Phsi I ~ahe i tr, 56, 1106 \\1952) ~ 8...

Morrison, James Sidney

1958-01-01T23:59:59.000Z

68

Determination of naphthenic acids in California crudes and refinery waste waters by fluoride ion chemical ionization mass spectrometry  

SciTech Connect (OSTI)

A method based on negative ion chemical ionization mass spectrometry using fluoride (F/sup -/) ions produced from NF/sub 3/ reagent gas has been applied to the analysis of naphthenic acids in California crude oils and refinery waste waters. Since complex mixtures of naphthenic acids cannot be separated into individual components, only the determination of relative distribution of acids classified by the hydrogen deficiency was possible. The identities and relative distribution of paraffinic and mono-, di-, tri, and higher polycyclic acids were obtained from the intensities of the carboxylate (RCOO/sup -/) ions.

Dzidic, I.; Somerville, A.C.; Raia, J.C.; Hart, H.V.

1988-07-01T23:59:59.000Z

69

Characterization of double walled carbon nanotubes-polyvinylidene fluoride nanocomposites  

E-Print Network [OSTI]

One of the main objectives of this thesis is to disperse double-walled carbon nanotubes (DWNT) in a polyvinylidene fluoride (PVDF) matrix, and to characterize the resulting composite using electrical, thermal, and mechanical characterization...

Almasri, Atheer Mohammad

2007-04-25T23:59:59.000Z

70

Fluorination of amorphous thin-film materials with xenon fluoride  

DOE Patents [OSTI]

A method is disclosed for producing fluorine-containing amorphous semiconductor material, preferably comprising amorphous silicon. The method includes depositing amorphous thin-film material onto a substrate while introducing xenon fluoride during the film deposition process.

Weil, R.B.

1987-05-01T23:59:59.000Z

71

ammonium fluoride precatalysts: Topics by E-print Network  

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

sites can be seen in Figure 6-1. Of these sites, all are located within the United States. Fluorides are naturally-occurring components of rocks and soil and are also found in...

72

ammonium fluorides: Topics by E-print Network  

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

sites can be seen in Figure 6-1. Of these sites, all are located within the United States. Fluorides are naturally-occurring components of rocks and soil and are also found in...

73

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

74

Polar intermetallic compounds of the silicon and arsenic family elements and their ternary hydrides and fluorides  

SciTech Connect (OSTI)

An investigation has been made on the effects of hydrogen and fluoride in the solid state chemistry of alkaline-earth and divalent rare-earth metal pnictide (Pn) and tetrelide (Tt) phases A{sub 5}(Pn,Tt,){sub 3}Z{sub x}, where A = Ca, Sr, Ba, Sm, Eu, Yb; Pn = As, Sb, Bi; Tt = Si, Ge, Sn, Pb and Z = H, F. Several trivalent rare-earth-metal pnictides, RE{sub 5}Pn{sub 3} (RE = Y, La, Gd, Tb, Dy, Ho, Er, Tm) and alkaline-earth-metal trielides, A{sub 5}Tr{sub 3}Z{sub x} (Tr = Ga, In, Tl) have been included in an effort to complete observed structural trends. Two main experimental techniques were followed throughout this work, (a) reactions in absence of hydrogen or under continuous high vacuum, and (b) reactions with binary metal hydrides, AH{sub x}, in closed containers. The results demonstrate that all the phases reported with the {beta}-Yb{sub 5}Sb{sub 3}-type structure in the A{sub 5}Pn{sub 3} systems are hydrogen-stabilized compounds. Reactions in absence of hydrogen lead to compounds with the Mn{sub 5}Si{sub 3}-type structure. The structure type {beta}-Yb{sub 5}Sb{sub 3} (= Ca{sub 5}SB{sub 3}F) was found to be characteristic of ternary systems and inaccurately associated with phases that form in the Y{sub 5}Bi{sub 3}-type. A new series of isomorphous Zintl compounds with the Ca{sub 16}Sb{sub 11}-type structure were prepared and studied as well. All the alkaline-earth-metal tetrelides, A{sub 5}Tt{sub 3}, that crystallize in the Cr{sub 5}B{sub 3}-type structure can be interstitially derivatized by hydrogen or fluoride. Binary and ternary compounds were characterized by Guinier powder patterns, single crystal X-ray and powder neutron diffraction techniques. In an effort to establish property-structure relationships, electrical resistivity and magnetic measurements were performed on selected systems, and the results were explained in terms of the Zintl concepts, aided by extended Hueckel band calculations.

Leon-Escamilla, E.A.

1996-10-17T23:59:59.000Z

75

Fluoride, aluminum, and phosphate kinetics in cryolite workers  

SciTech Connect (OSTI)

Exposure to cryolite (Na3AlF6) dust may result in skeletal fluorosis. Eight male workers at a cryolite concentrator participated in a 4-day study after 5 days of vacation. Dust exposures were 0.16 to 21.2 mg/m3. Urine was collected before work began and during two 4-hour periods. Preshift urine fluoride concentrations increased during the week. Fluoride concentrations in postshift urine and serum both correlated with the dust exposures. Serum fluoride concentrations decreased with a half-life of 3.3 to 6.9 hours after work. Fluoride clearance was 40.5 to 76.5 mL/min at urinary flow rates of 0.89 to 2.21 mL/min. Serum aluminum concentrations varied without relation to the exposure, but the urinary aluminum excretion correlated with the fluoride levels. Preshift serum-phosphate concentrations increased significantly during the week, possibly indicating changes in mineral metabolism. For monitoring of individual uptake of cryolite dust, serum fluoride measurements are most useful.

Grandjean, P.; Horder, M.; Thomassen, Y. (Odense Univ. (Denmark))

1990-01-01T23:59:59.000Z

76

Anhydrous aluminum chloride as an alkylation catalyst: identification of mono- and dialkyl-benzenes from the condensation of tertiary butyl alcohol with benzene.  

E-Print Network [OSTI]

LIBRARY a a w c"I. I. SI - O~ TI:YAf ANHYDROUS ALUMINUM CHLORIDE AS AN ALKYLATION CATALYST: IDENTIFICATION OF MONO- AND DIALKYIZENZENES FROM THE CONDENSATION QF TERTIARY BUTYL ALCOHOL WITH BENKENE IACEY EUGENE SCOGGINS 4 A Thesis Submitted...: IDENTIFICATION OF MONO- AND DI~NZZNES FROM THE CONDENSATION OF TERTIARY BUTYL ALCOHOL WITH BENZENE A Thesis By LACEY EUGENE SCOGGINS Approved as to style and content hy: Chairman of Committee Head of Chemistry Department 1959 ACKNOWLEDGME1VTS The author...

Scoggins, Lacey E

1959-01-01T23:59:59.000Z

77

Removal of fluoride from aqueous solution by using alum sludge  

SciTech Connect (OSTI)

The ability of treated alum sludge to remove fluoride from aqueous solution has been investigated. The studies were carried out as functions of contact time, concentration of adsorbent and adsorbate, temperature, pH, and effect of concentrations of other anions. The data indicate that treated alum sludge surface sites are heterogeneous in nature and that fits into a heterogeneous site binding model. The optimum pH for complete removal of fluoride from aqueous solution was found to be 6. The rate of adsorption was rapid during the initial 5 minutes, and equilibrium was attained within 240 minutes. The adsorption followed first-order rate kinetics. The present system followed the Langmuir adsorption isotherm model. The loading factor (i.e., the milligram of fluoride adsorbed per gram of alum sludge) increased with initial fluoride concentration, whereas a negative trend was observed with increasing temperature. The influence of addition of anions on fluoride removal depends on the relative affinity of the anions for the surface and the relative concentrations of the anions.

Sujana, M.G.; Thakur, R.S.; Rao, S.B. [CSIR, Bhubaneswar (India). Regional Research Lab.] [CSIR, Bhubaneswar (India). Regional Research Lab.

1998-10-01T23:59:59.000Z

78

Lithium fluoride (LiF) crystal for parametric X-ray (PXR) production  

E-Print Network [OSTI]

Lithium fluoride (LiF) crystal for parametric X-ray (PXR) production B. Sones *, Y. Danon, R 2004 Abstract Parametric X-ray (PXR) production is reported using lithium fluoride (LiF) as a target

Danon, Yaron

79

Hydrogen Bibliography  

SciTech Connect (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

80

Inhibition of the ATPase activity of Escherichia coli ATP synthase by magnesium fluoride  

E-Print Network [OSTI]

Inhibition of the ATPase activity of Escherichia coli ATP synthase by magnesium fluoride Zulfiqar activity of Escherichia coli ATP synthase by magnesium fluoride (MgFx) was studied. Wild-type F1-ATPase synthesis mechanism; Magnesium fluoride; ATPase inhibition; Transition state analog 1. Introduction ATP

Zulfiqar Ahmad

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

THE RAMAN SPECTRUM OF MAGNESIUM FLUORIDE By R. S. KRISHNAN and R. S. KATIYAR,  

E-Print Network [OSTI]

627. THE RAMAN SPECTRUM OF MAGNESIUM FLUORIDE By R. S. KRISHNAN and R. S. KATIYAR, Department, NOVEMBRE 1965, I Magnesium fluoride, which occurs in nature as the mineral sellaite, crystallizes spectrum of magnesium fluoride (MgF2) taken with a medium Quartz spectrograph. (b) Its microphotometer

Paris-Sud XI, Université de

82

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

83

The effect of fluoride and aluminum on the anion exchange of plutonium from nitric acid  

SciTech Connect (OSTI)

Anion exchange in nitric acid is a prominent aqueous process used to recover and purify plutonium from impure nuclear materials. This process is sensitive to fluoride ion, which complexes plutonium in competition with the anionic nitrato complex that is strongly sorbed on the anion exchange column. Fluoride interference traditionally has been counteracted by adding a masking agent, such as aluminum, that forms competing complexes with fluoride. The interfering effect of fluoride is known to be a function not only of the fluoride-to-aluminum ratio but also of the fluoride-to-plutonium ratio. This report summarizes a Los Alamos study of the effect of 25 fluoride-aluminum-plutonium conmbinations on the anion exchange sorption of plutonium. Five aluminum-to-plutonium ratios ranging from 0.10 to 10 were each evaluated at five fluoride-to-aluminum ratios that ranged from 0 to 6. The fluoride-to-plutonium ratio has a greater influence on plutonium sorption than does the fluoride-to-aluminum ratio. Aluminum was less effective as a masking agent than had been assumed, because measurable fluoride interference occurred at all levels of added aluminum.

Marsh, S.F.

1987-07-01T23:59:59.000Z

84

Structural studies of magnesium nitride fluorides by powder neutron diffraction  

SciTech Connect (OSTI)

Samples of ternary nitride fluorides, Mg{sub 3}NF{sub 3} and Mg{sub 2}NF have been prepared by solid state reaction of Mg{sub 3}N{sub 2} and MgF{sub 2} at 1323-1423 K and investigated by powder X-ray and powder neutron diffraction techniques. Mg{sub 3}NF{sub 3} is cubic (space group: Pm3m) and has a structure related to rock-salt MgO, but with one cation site vacant. Mg{sub 2}NF is tetragonal (space group: I4{sub 1}/amd) and has an anti-LiFeO{sub 2} related structure. Both compounds are essentially ionic and form structures in which nitride and fluoride anions are crystallographically ordered. The nitride fluorides show temperature independent paramagnetic behaviour between 5 and 300 K. - Graphical abstract: Definitive structures of the ternary magnesium nitride fluorides Mg{sub 3}NF{sub 3} and the lower temperature polymorph of Mg{sub 2}NF have been determined from powder neutron diffraction data. The nitride halides are essentially ionic and exhibit weak temperature independent paramagnetic behaviour. Highlights: Black-Right-Pointing-Pointer Definitive structures of Mg{sub 3}NF{sub 3} and Mg{sub 2}NF were determined by neutron diffraction. Black-Right-Pointing-Pointer Nitride and fluoride anions are crystallographically ordered in both structures. Black-Right-Pointing-Pointer Both compounds exhibit weak, temperature independent paramagnetic behaviour. Black-Right-Pointing-Pointer The compounds are essentially ionic with ionicity increasing with F{sup -} content.

Brogan, Michael A. [School of Chemistry, University of Nottingham, Nottingham NG7 2RD (United Kingdom); Hughes, Robert W. [WestCHEM, School of Chemistry, University of Glasgow, Glasgow G12 8QQ (United Kingdom); Smith, Ronald I. [ISIS Pulsed Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX (United Kingdom); Gregory, Duncan H., E-mail: Duncan.Gregory@glasgow.ac.uk [WestCHEM, School of Chemistry, University of Glasgow, Glasgow G12 8QQ (United Kingdom)

2012-01-15T23:59:59.000Z

85

Hydrogen Pipeline Working Group Workshop: Code for Hydrogen Pipelines...  

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

Working Group Workshop: Code for Hydrogen Pipelines Hydrogen Pipeline Working Group Workshop: Code for Hydrogen Pipelines Code for Hydrogen Piping and Pipelines. B31 Hydrogen...

86

Hydrogen program overview  

SciTech Connect (OSTI)

This paper consists of viewgraphs which summarize the following: Hydrogen program structure; Goals for hydrogen production research; Goals for hydrogen storage and utilization research; Technology validation; DOE technology validation activities supporting hydrogen pathways; Near-term opportunities for hydrogen; Market for hydrogen; and List of solicitation awards. It is concluded that a full transition toward a hydrogen economy can begin in the next decade.

Gronich, S. [Dept. of Energy, Washington, DC (United States). Office of Utility Technologies

1997-12-31T23:59:59.000Z

87

Hydrogen Permeability and Integrity of Hydrogen  

E-Print Network [OSTI]

Hydrogen Permeability and Integrity of Hydrogen Delivery Pipelines Z. Feng*, L.M. Anovitz*, J and industry expectations · DOE Pipeline Working Group and Tech Team activities - FRP Hydrogen Pipelines - Materials Solutions for Hydrogen Delivery in Pipelines - Natural Gas Pipelines for Hydrogen Use #12;3 OAK

88

Hydrogen Technologies Group  

SciTech Connect (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

89

The Hype About Hydrogen  

E-Print Network [OSTI]

economy based on the hydrogen fuel cell, but this cannot beus to look toward hydrogen. Fuel cell basics, simplifiedthe path to fuel cell commercialization. Hydrogen production

Mirza, Umar Karim

2006-01-01T23:59:59.000Z

90

Hydrogen Transition Infrastructure Analysis  

SciTech Connect (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

91

The Hype About Hydrogen  

E-Print Network [OSTI]

another promising solution for hydrogen storage. However,storage and delivery, and there are safety issues as well with hydrogen

Mirza, Umar Karim

2006-01-01T23:59:59.000Z

92

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.

93

Hydrogen Analysis Group  

SciTech Connect (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

94

Luminescence from Edge Fracture in Shocked Lithium Fluoride Crystals  

SciTech Connect (OSTI)

Light emitted from a [100] lithium fluoride crystal was characterized under shock wave compression to 28GPa followed by complete stress release at the edges. The light was examined using time-gated optical spectrometry and imaging, time-resolved optical emission measurements, and hydrodynamic modeling. The shock arrival at the circumference of the crystal was delayed relative to the center so that the two regions could be studied at different times. The majority of the light emission originated when the shock waves released at the circumference of the crystal. Unlike previously reported results for shocked lithium fluoride, we found that the light spectrum is not strictly broad band, but has spectral lines associated with atomic lithium in addition to a broad band background. Also, the emission spectrum depends strongly on the gas surrounding the sample. Based on our observations, the line emission appears to be related to fracture of the lithium fluoride crystal from the shock wave releasing at the edges. Experimenters frequently utilize lithium fluoride crystals as transparent windows for observing shock compressed samples. Because of the experimental geometries used, the shock wave in such cases often reaches the circumference of the window at nearly the same moment as when it reaches the center of the sample-window interface. Light generated at the circumference could contaminate the measurement at the interface when this light scatters into the observed region. This background light may be reduced or avoided using experimental geometries which delay the arrival of the shock wave at the edges of the crystal.

Turley, W. D. [NSTec; Stevens, G. D. [NSTec; Capelle, G. A. [NSTec; Grover, M. [NSTec; Holtkamp, D. B. [LANL; LaLone, B. M. [NSTec; Veeser, L. R. [NSTec, LANL

2013-04-01T23:59:59.000Z

95

E-Print Network 3.0 - americium fluorides Sample Search Results  

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

REPRODUCTION Summary: Tritium Uranium Z34 Americium Z41 Cesium i37 Radium ZZ6 Strontium 90 Chloride Fluoride Nit rate Dissolved... Alpha (unidentified) Beta (Unidentified)...

96

E-Print Network 3.0 - alkaline earth fluorides Sample Search...  

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

in Earth's mantle formed by liquid immiscibility Stephan Klemme... . The light rare earth elements (LREEs), Sr, and Ba are partitioned into the fluoride melt, whereas the...

97

Grout formulation for disposal of low-level and hazardous waste streams containing fluoride  

DOE Patents [OSTI]

A composition and related process for disposal of hazardous waste streams containing fluoride in cement-based materials is disclosed. the presence of fluoride in cement-based materials is disclosed. The presence of fluoride in waste materials acts as a set retarder and as a result, prevents cement-based grouts from setting. This problem is overcome by the present invention wherein calcium hydroxide is incorporated into the dry-solid portion of the grout mix. The calcium hydroxide renders the fluoride insoluble, allowing the grout to set up and immobilize all hazardous constituents of concern. 4 tabs.

McDaniel, E.W.; Sams, T.L.; Tallent, O.K.

1987-06-02T23:59:59.000Z

98

E-Print Network 3.0 - arsenic fluorides Sample Search Results  

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

(F), selenium (Se), uranium (U), and radium... : arsenic, fluoride, nitrate, selenium, uranium, and ... Source: Scanlon, Bridget R. - Bureau of Economic Geology, Department of...

99

Valve studies: Hydrogen fluoride monitoring of UF{sub 6} cylinder valves  

SciTech Connect (OSTI)

Uranium hexafluoride (UF{sub 6}) cylinder valves have, like the cylinders, been in use and/or storage for periods ranging from 15 to 44 years. Visual inspection of the cylinders has shown that the extent of corrosion and the overall cylinder condition varies widely throughout the storage yards. One area of concern is the integrity of the cylinder valves. Visual inspection has found deposits which have been identified as radioactive material on or near the valves. These deposits suggest leakage of UF{sub 6} and may indicate valve degradation; however, these deposits may simply be residual material from cylinder filling operations.

Leedy, R.R.; Ellis, A.R.; Hoffmann, D.P.; Marsh, G.C. [and others

1996-08-01T23:59:59.000Z

100

E-Print Network 3.0 - ammonium hydrogen fluoride Sample Search...  

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

tetrafluoride 7783-58-6 Hexafluoroacetone 684-16-2 ... Source: Manning, Sturt - Cornell Tree-Ring Laboratory, Cornell University Collection: Environmental Sciences and Ecology 10...

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

Photothermal electrostatics of the d-poiyvlnylidene fluoride photopyroelectric hydrogen gas sensor  

E-Print Network [OSTI]

atoms adsorbed and subsequently absorbed in the Pd ground electrode of the PVDF. In this paper in Fig. 1. This amounts to a capacitor consisting of Pd-elec- trode (ground; anode)/PVDF dielectric/Al-Ni-electrode) A detailed photothermal electrostatic consideration of the Pd-pyroelectric junction H, sensor is presented

Mandelis, Andreas

102

Hydrogen Peroxide Storage in Small Sealed Tanks  

SciTech Connect (OSTI)

Unstabilized hydrogen peroxide of 85% concentration has been prepared in laboratory quantities for testing material compatibility and long term storage on a small scale. Vessels made of candidate tank and liner materials ranged in volume from 1 cc to 2540 cc. Numerous metals and plastics were tried at the smallest scales, while promising ones were used to fabricate larger vessels and liners. An aluminum alloy (6061-T6) performed poorly, including increasing homogeneous decay due to alloying elements entering solution. The decay rate in this high strength aluminum was greatly reduced by anodizing. Better results were obtained with polymers, particularly polyvinylidene fluoride. Data reported herein include ullage pressures as a function of time with changing decay rates, and contamination analysis results.

Whitehead, J.

1999-10-20T23:59:59.000Z

103

DOE Hydrogen and Fuel Cells Program Record 11007: Hydrogen Threshold...  

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

and Fuel Cells Program Record 11007: Hydrogen Threshold Cost Calculation DOE Hydrogen and Fuel Cells Program Record 11007: Hydrogen Threshold Cost Calculation The hydrogen...

104

Hydrogen permeability and Integrity of hydrogen transfer pipelines...  

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

permeability and Integrity of hydrogen transfer pipelines Hydrogen permeability and Integrity of hydrogen transfer pipelines Presentation by 03-Babu for the DOE Hydrogen Pipeline...

105

NREL Wind to Hydrogen Project: Renewable Hydrogen Production...  

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

Wind to Hydrogen Project: Renewable Hydrogen Production for Energy Storage & Transportation NREL Wind to Hydrogen Project: Renewable Hydrogen Production for Energy Storage &...

106

Bulk Hydrogen Storage - Strategic Directions for Hydrogen Delivery...  

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

Bulk Hydrogen Storage - Strategic Directions for Hydrogen Delivery Workshop Bulk Hydrogen Storage - Strategic Directions for Hydrogen Delivery Workshop Targets, barriers and...

107

HYDROGEN REGIONAL INFRASTRUCTURE PROGRAM  

E-Print Network [OSTI]

to serve as "go-to" organization to catalyze PA Hydrogen and Fuel Cell Economy development #12;FundingHYDROGEN REGIONAL INFRASTRUCTURE PROGRAM IN PENNSYLVANIA HYDROGEN REGIONAL INFRASTRUCTURE PROGRAM IN PENNSYLVANIA Melissa Klingenberg, PhDMelissa Klingenberg, PhD #12;Hydrogen ProgramHydrogen Program Air Products

108

Hydrogen Delivery Mark Paster  

E-Print Network [OSTI]

Liquids (e.g. ethanol etc.) ­ Truck: HP Gas & Liquid Hydrogen ­ Regional Pipelines ­ Breakthrough Hydrogen;Delivery Key Challenges · Pipelines ­ Retro-fitting existing NG pipeline for hydrogen ­ Utilizing existing NG pipeline for Hythane with cost effective hydrogen separation technology ­ New hydrogen pipeline

109

Selective Adsorption of Sodium Aluminum Fluoride Salts from Molten Aluminum  

SciTech Connect (OSTI)

Aluminum is produced in electrolytic reduction cells where alumina feedstock is dissolved in molten cryolite (sodium aluminum fluoride) along with aluminum and calcium fluorides. The dissolved alumina is then reduced by electrolysis and the molten aluminum separates to the bottom of the cell. The reduction cell is periodically tapped to remove the molten aluminum. During the tapping process, some of the molten electrolyte (commonly referred as “bath” in the aluminum industry) is carried over with the molten aluminum and into the transfer crucible. The carryover of molten bath into the holding furnace can create significant operational problems in aluminum cast houses. Bath carryover can result in several problems. The most troublesome problem is sodium and calcium pickup in magnesium-bearing alloys. Magnesium alloying additions can result in Mg-Na and Mg-Ca exchange reactions with the molten bath, which results in the undesirable pickup of elemental sodium and calcium. This final report presents the findings of a project to evaluate removal of molten bath using a new and novel micro-porous filter media. The theory of selective adsorption or removal is based on interfacial surface energy differences of molten aluminum and bath on the micro-porous filter structure. This report describes the theory of the selective adsorption-filtration process, the development of suitable micro-porous filter media, and the operational results obtained with a micro-porous bed filtration system. The micro-porous filter media was found to very effectively remove molten sodium aluminum fluoride bath by the selective adsorption-filtration mechanism.

Leonard S. Aubrey; Christine A. Boyle; Eddie M. Williams; David H. DeYoung; Dawid D. Smith; Feng Chi

2007-08-16T23:59:59.000Z

110

Kinetics of aluminum fluoride complexation in acidic waters  

SciTech Connect (OSTI)

Acidic deposition has an important effect on the transport and speciation of soluble aluminum. Toxicity of aqueous aluminum seems to be strongly dependent on aluminum speciation and the presence of complexing ligands such as fluoride. A study is reported of the complex formation kinetics of AlF/sup 2 +/ in the environmentally significant pH range 2.9-4.9. The pH and temperature dependencies of the overall rate of reaction are discussed along with environmental implications for areas subjected to acidic deposition. 22 references, 6 figures, 4 tables.

Plankey, B.J.; Patterson, H.H.; Cronan, C.S.

1986-02-01T23:59:59.000Z

111

Hydrogen Fuel Cell Vehicles  

E-Print Network [OSTI]

Hydrogen Fuel Cell Vehicles UCD-ITS-RR-92-14 September bycost than both. Solar-hydrogen fuel- cell vehicles would becost than both. Solar-hydrogen fuel- cell vehicles would be

Delucchi, Mark

1992-01-01T23:59:59.000Z

112

Hydrogen Fuel Cell Vehicles  

E-Print Network [OSTI]

Hydrogen Fuel Cell Vehicles UCD-ITS-RR-92-14 September byet al. , 1988,1989 HYDROGEN FUEL-CELL VEHICLES: TECHNICALIn the FCEV, the hydrogen fuel cell could supply the "net"

Delucchi, Mark

1992-01-01T23:59:59.000Z

113

Hydrogen Fuel Cell Vehicles  

E-Print Network [OSTI]

for the hydrogen refueling station. Compressor cost: inputcost) Compressor power requirement: input data 288.80 Initial temperature of hydrogen (Compressor cost per unit of output ($/hp/million standard ft [SCF] of hydrogen/

Delucchi, Mark

1992-01-01T23:59:59.000Z

114

Hydrogen and Infrastructure Costs  

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

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...

115

Hydrogen and fuel taxation.  

E-Print Network [OSTI]

??The competitiveness of hydrogen depends on how it is integrated in the energy tax system in Europe. This paper addresses the competitiveness of hydrogen and… (more)

Hansen, Anders Chr.

2007-01-01T23:59:59.000Z

116

Hydrogen Permeation Barrier Coatings  

SciTech Connect (OSTI)

Gaseous hydrogen, H2, has many physical properties that allow it to move rapidly into and through materials, which causes problems in keeping hydrogen from materials that are sensitive to hydrogen-induced degradation. Hydrogen molecules are the smallest diatomic molecules, with a molecular radius of about 37 x 10-12 m and the hydrogen atom is smaller still. Since it is small and light it is easily transported within materials by diffusion processes. The process of hydrogen entering and transporting through a materials is generally known as permeation and this section reviews the development of hydrogen permeation barriers and barrier coatings for the upcoming hydrogen economy.

Henager, Charles H.

2008-01-01T23:59:59.000Z

117

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

118

Hydrogen | Department of Energy  

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

Sources Hydrogen Hydrogen September 30, 2014 Developed by Sandia National Laboratories and several industry partners, the fuel cell mobile light (H2LT) offers a cleaner, quieter...

119

Hydrogen | Department of Energy  

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

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...

120

CAN HYDROGEN WIN?: EXPLORING SCENARIOS FOR HYDROGEN  

E-Print Network [OSTI]

such as biofuel plug-in hybrids, but did well when biofuels were removed or priced excessively. Hydrogen fuel cells failed unless costs were assumed to descend independent of demand. However, hydrogen vehicles were; Hydrogen as fuel -- Economic aspects; Technological innovations -- Environmental aspects; Climatic changes

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

Damage thresholds of fluoride multilayers at 355 nm  

SciTech Connect (OSTI)

Fluoride multilayer coatings were evaluated for use in 355 nm high reflector applications. The LaF[sub 3]/Na[sub 3]AlF[sub 6], NdF[sub 3]/Na[sub 3]AlF[sub 6] and GdF[sub 3]/Na[sub 3]AlF[sub 6] multilayers had laser damage thresholds of 20, 17.9 and 7.4 (measured at 10-ns pulsewidths), respectively. High tensile stresses in the coatings restricted this evaluation to only 5-layer-pair partial reflectors (49--52%).The LaF[sub 3]/Na[sub 3]AlF[sub 6], NdF[sub 3]/Na[sub 3]Al[sub 6] and GdF[sub 3]/Na[sub 3]AlF[sub 6] multilayers had tensile stresses of [approximately] 1.1 [times] 109, 1.3 [times] 109 and 9.3 [times] 10[sup 8] dynes/cm[sup 2], respectively. Substrate material and glow-discharge processing of the substrates were found to influence the density of stress-induced coating fractures and damage thresholds in some cases. If stress fracturing and scatter can be controlled, these fluoride material combinations are suited for 3[omega] applications.

Chow, R.; Kozlowski, M.R.; Loomis, G.E.; Rainer, F.

1992-10-01T23:59:59.000Z

122

The synthesis and structural characterization of novel transition metal fluorides  

SciTech Connect (OSTI)

High purity KMF[sub 6] and K[sub 2]MF[sub 6] salts (M = Mo,Re, Ru, Os, Ir, Pt) are obtained from reduction hexafluorides. A rhombohedral unit cell is observed for KReF[sub 6]. Fluoride ion capture by Lewis acids from the hexafluorometallate (IV) salts affords high purity tetrafluorides for M = Mo, Re, Ru, Os, and Pd. The structure of RuF[sub 4] is determined from X-ray synchrotron and neutron powder data. Unit cells based on theorthorhombic PdF[sub 4] type cell are derived from X-ray powder data for ReF[sub 4] and OsF[sub 4]. Fluoride ion capture from KAgF[sub 4] provides the thermally unstable trifluoride as a bright, red, diamagnetic solid. The structure solution of AgF[sub 3] and redetermination of the AuF[sub 3] structure from X-ray synchrotron and neutron powder data demonstrate that the two are isostnictural. Thermal decomposition product of AgF[sub 3] is the mixed valence compound Ag[sup II]Ag[sub 2][sup III]F[sub 8]. Several new salts containing the (Ag - F)[sub n][sup n+] chain cation are prepared. The first linear (Ag - F)[sub n][sup n+] chain is observed in AgF[sup +]BF[sub 4 [sup [minus

Casteel, W.J. Jr.

1992-09-01T23:59:59.000Z

123

Proximal renal tubular injury in rats sub-chronically exposed to low fluoride concentrations  

SciTech Connect (OSTI)

Fluoride is usually found in groundwater at a very wide range of concentration between 0.5 and 25 ppm. At present, few studies have assessed the renal effects of fluoride at environmentally relevant concentrations. Furthermore, most of these studies have used insensitive and nonspecific biomarkers of kidney injury. The aim of this study was to use early and sensitive biomarkers to evaluate kidney injury after fluoride exposure to environmentally relevant concentrations. Recently weaned male Wistar rats were exposed to low (15 ppm) and high (50 ppm) fluoride concentrations in drinking water for a period of 40 days. At the end of the exposure period, kidney injury biomarkers were measured in urine and renal mRNA expression levels were assessed by real time RT-PCR. Our results showed that the urinary kidney injury molecule (Kim-1), clusterin (Clu), osteopontin (OPN) and heat shock protein 72 excretion rate significantly increased in the group exposed to the high fluoride concentration. Accordingly, fluoride exposure increased renal Kim-1, Clu and OPN mRNA expression levels. Moreover, there was a significant dose-dependent increase in urinary ?-2-microglobulin and cystatin-C excretion rate. Additionally, a tendency towards a dose dependent increase of tubular damage in the histopathological light microscopy findings confirmed the preferential impact of fluoride on the tubular structure. All of these changes occurred at early stages in which, the renal function was not altered. In conclusion using early and sensitive biomarkers of kidney injury, we were able to found proximal tubular alterations in rats sub-chronically exposed to fluoride. - Highlights: • Exposure to low concentrations of fluoride induced proximal tubular injury • Increase in urinary Kim-1, Clu, OPN and Hsp72 in 50 ppm fluoride-exposed group • Increase in urinary B2M and CysC in 15 and 50 ppm fluoride-exposed groups • Fluoride exposure increased renal Kim, Clu and OPN mRNA expression levels. • Fluoride increased kidney injury biomarkers at stages where eGFR was unaltered.

Cárdenas-González, Mariana C.; Del Razo, Luz M. [Departmento de Toxicología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), México, D. F., México (Mexico); Barrera-Chimal, Jonatan [Unidad de Fisiología Molecular, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México and Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, México, D. F., México (Mexico); Jacobo-Estrada, Tania [Departmento de Toxicología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), México, D. F., México (Mexico); López-Bayghen, Esther [Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), México, D. F., México (Mexico); and others

2013-11-01T23:59:59.000Z

124

Hydrogen Energy Technology Geoff Dutton  

E-Print Network [OSTI]

Integrated gasification combined cycle (IGCC) Pyrolysis Water electrolysis Reversible fuel cell Hydrogen Hydrogen-fuelled internal combustion engines Hydrogen-fuelled turbines Fuel cells Hydrogen systems Overall expensive. Intermediate paths, employing hydrogen derived from fossil fuel sources, are already used

Watson, Andrew

125

Safetygram #9- Liquid Hydrogen  

Broader source: Energy.gov [DOE]

Hydrogen is colorless as a liquid. Its vapors are colorless, odorless, tasteless, and highly flammable.

126

Hydrogen Delivery Liquefaction & Compression  

E-Print Network [OSTI]

Hydrogen Delivery Liquefaction & Compression Raymond Drnevich Praxair - Tonawanda, NY Strategic Initiatives for Hydrogen Delivery Workshop - May 7, 2003 #12;2 Agenda Introduction to Praxair Hydrogen Liquefaction Hydrogen Compression #12;3 Praxair at a Glance The largest industrial gas company in North

127

NATIONAL HYDROGEN ENERGY ROADMAP  

E-Print Network [OSTI]

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 Energy Roadmap Workshop to make it a reality. This Roadmap provides a framework that can make a hydrogen economy a reality

128

Gaseous Hydrogen Delivery Breakout - Strategic Directions for...  

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

Gaseous Hydrogen Delivery Breakout - Strategic Directions for Hydrogen Delivery Workshop Gaseous Hydrogen Delivery Breakout - Strategic Directions for Hydrogen Delivery Workshop...

129

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

130

The synthesis and structural characterization of novel transition metal fluorides  

SciTech Connect (OSTI)

High purity KMF{sub 6} and K{sub 2}MF{sub 6} salts (M = Mo,Re, Ru, Os, Ir, Pt) are obtained from reduction hexafluorides. A rhombohedral unit cell is observed for KReF{sub 6}. Fluoride ion capture by Lewis acids from the hexafluorometallate (IV) salts affords high purity tetrafluorides for M = Mo, Re, Ru, Os, and Pd. The structure of RuF{sub 4} is determined from X-ray synchrotron and neutron powder data. Unit cells based on theorthorhombic PdF{sub 4} type cell are derived from X-ray powder data for ReF{sub 4} and OsF{sub 4}. Fluoride ion capture from KAgF{sub 4} provides the thermally unstable trifluoride as a bright, red, diamagnetic solid. The structure solution of AgF{sub 3} and redetermination of the AuF{sub 3} structure from X-ray synchrotron and neutron powder data demonstrate that the two are isostnictural. Thermal decomposition product of AgF{sub 3} is the mixed valence compound Ag{sup II}Ag{sub 2}{sup III}F{sub 8}. Several new salts containing the (Ag - F){sub n}{sup n+} chain cation are prepared. The first linear (Ag - F){sub n}{sup n+} chain is observed in AgF{sup +}BF{sub 4 {sup {minus}}} which crystallizes in a tetragonal unit. AgFAuF{sub 4} has a triclinic unit cell and is isostructural with CuFAuF{sub 4}. AgFAuF{sub 6} has an orthorhombic unit cell and appears to be isostructural with AgFAsF{sub 6}. A second mixed valence silver fluoride, Ag{sup II}Ag{sup III}F{sub 5}, is prepared, which magnetic measurements indicate is probably an AgF{sup +} salt. Magnetic data for all of the AgF{sup +} salts exhibit low magnitude, temperature independent paramagnetism characteristic of metallic systems. Cationic AG(II) in acidic AHF solutions is a powerful oxidizer, capable of oxidizing Xe to Xe(II) and O{sub 2} to O{sub 2}{sup +}. Reactions with C{sub 6}F{sub 6} and C{sub 3}F{sub 6} suggest an electron capture mechanism for cationic AG(II) oxidations.

Casteel, W.J. Jr.

1992-09-01T23:59:59.000Z

131

Effect of the isoelectric point on the adsorption of molybdates on fluoride-modified aluminas  

SciTech Connect (OSTI)

The isoelectric point (IEP) of ..gamma..-alumina was modified by the addition of various amounts of fluoride. The modified aluminas were used as supports for molybdenum catalysts prepared by equilibrium adsorption at pH = 6.5. Also, the adsorption of molybdate on supports containing various amounts of fluoride was studied as a function of pH. The amount of molybdenum adsorbed on the fluoride-modified aluminas was found to decrease the IEP of the carrier decreased. An electrostatic model is used to interpret the results. 9 references.

Mulcahy, F.M.; Houalla, M.; Hercules, D.M.

1987-07-01T23:59:59.000Z

132

Removal of impurities from dry scrubbed fluoride enriched alumina  

SciTech Connect (OSTI)

The pot-gas from an aluminum electrolytic cell is cleaned by a dry scrubbing process using fresh alumina as a scrubbing agent. This alumina is enriched with fluorides and trace impurities in a closed loop system with the pots. The only significant removal of the impurities is due to metal tapping. An improved technique has been developed that is more effective than earlier stripper systems. The impurity-rich fine fraction (< 10 {micro}m) of the enriched alumina is partly attached to the coarser alumina. That attachment has to be broken. Selective impact milling under special moderate conditions and air classifying have shown to be a cost effective process for the removal of impurities. For iron (Fe) and phosphorus (P) about 30--70% can be removed by the separation of 0.5--1% of the alumina. Full scale tests have successfully confirmed these results.

Schuh, L. [ABB Corporate Research Center, Heidelberg (Germany); Wedde, G. [ABB Environmental, Oslo (Norway)

1996-10-01T23:59:59.000Z

133

Fluoride Salt-Cooled High-Temperature Reactor Development Roadmap  

SciTech Connect (OSTI)

Fluoride salt-cooled high-temperature reactors (FHRs) are an emerging reactor class with potentially advantageous performance characteristics and fully passive safety. This paper provides an overview of a technology development pathway for expeditious commercial deployment of first-generation FHRs. The paper describes the principal remaining FHR technology challenges and the development path needed to address the challenges. First-generation FHRs do not appear to require any technology breakthroughs, but will require significant technology development and demonstration. FHRs are currently entering early phase engineering development. As such, the development roadmap is not as technically detailed or specific as would be the case for a more mature reactor class. The higher cost of fuel and coolant; the lack of an approved licensing framework; the lack of qualified, salt-compatible structural materials; and the potential for tritium release into the environment are the most obvious issues that remain to be resolved.

Holcomb, David Eugene [ORNL] [ORNL; Flanagan, George F [ORNL] [ORNL; Mays, Gary T [ORNL] [ORNL; Pointer, William David [ORNL] [ORNL; Robb, Kevin R [ORNL] [ORNL; Yoder Jr, Graydon L [ORNL] [ORNL

2014-01-01T23:59:59.000Z

134

Removal of fluoride impurities from UF/sub 6/ gas  

DOE Patents [OSTI]

A method of purifying a UF/sub 6/ gas stream containing one or more metal fluoride impurities composed of a transuranic metal, transition metal or mixtures thereof, is carried out by contacting the gas stream with a bed of UF/sub 5/ in a reaction vessel under conditions where at least one impurity reacts with the UF/sub 5/ to form a nongaseous product and a treated gas stream, and removing the treated gas stream from contact with the bed. The nongaseous products are subsequently removed in a reaction with an active fluorine affording agent to form a gaseous impurity which is removed from the reaction vessel. The bed of UF/sub 5/ is formed by the reduction of UF/sub 6/ in the presence of uv light. One embodiment of the reaction vessel includes a plurality of uv light sources as tubes on which UF/sub 5/ is formed. 2 figures.

Beitz, J.V.

1984-01-06T23:59:59.000Z

135

Evaluation of fluoride-induced metal mobilization in soil columns  

SciTech Connect (OSTI)

Fluoride in soil solution may cause substantially increased leaching of dissolved organic carbon (DOC), Al, and heavy metals from soils. The authors objective was to examine whether increased metal solubility is attributable to formation of fluoro- or organo-complexes. The A horizon of a Slovak soil contaminated with heavy metals and F by Al smelter emissions was used to conduct two column experiments under saturated and steady-state water flow conditions. The columns were leached with 5 mM Na{sub 2}SO{sub 4}, 1 mM NaCl, and 9 mM NaF solutions at pH 5.5 and an electrical conductivity of 1,000 {micro}S cm{sup {minus}1}. Samples were collected in 70-min intervals for approximately 7 d. Two experiments were performed. In the first experiment (single F pulse), a fluoride (F) pulse was applied for 36 pore volumes (PVs), while in the second experiment (dual F pulse), two consecutive F pulses (each for 2.8 PVs) were applied. For both experiments, Cl breakthrough curves (BTCs) revealed a convection-dominated transport regime. The breakthrough of Cd, Cr, Fe, Ni, and Pb paralleled DOC breakthrough in both experiments indicating metal leaching as organocomplex. In the dual F pulse experiment, peak separation of the DOC and the complexed F (F{sub bound}) breakthrough was achieved. The highest F{sub bound} concentration occurred 3.8 PVs later than that of DOC. The AlBTC paralleled that of F{sub bound} but showed tailing with a turning point simultaneous to the highest DOC concentration. Thus, the increase in Al solubility was mainly caused by fluoro-complexation and only to a lesser extent by organo-complexation.

Totsche, K.U.; Wilcke, W.; Koerber, M.; Kobza, J.; Zech, W.

2000-04-01T23:59:59.000Z

136

Hydrogen Permeability and Integrity of Hydrogen Delivery Pipelines...  

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

Permeability and Integrity of Hydrogen Delivery Pipelines Hydrogen Permeability and Integrity of Hydrogen Delivery Pipelines Project Objectives: To gain basic understanding of...

137

DOE Hydrogen and Fuel Cells Program Record 5037: Hydrogen Storage...  

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

5037: Hydrogen Storage Materials - 2004 vs. 2006 DOE Hydrogen and Fuel Cells Program Record 5037: Hydrogen Storage Materials - 2004 vs. 2006 This program record from the Department...

138

Hydrogen Delivery Technologies and Systems- Pipeline Transmission of Hydrogen  

Broader source: Energy.gov [DOE]

Hydrogen Delivery Technologies and Systems - Pipeline Transmission of Hydrogen. Design and operations standards and materials for hydrogen and natural gas pipelines.

139

Hydrogen Supply: Cost Estimate for Hydrogen Pathways-Scoping...  

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

Supply: Cost Estimate for Hydrogen Pathways-Scoping Analysis. January 22, 2002-July 22, 2002 Hydrogen Supply: Cost Estimate for Hydrogen Pathways-Scoping Analysis. January 22,...

140

Inhibition effects of N,N-dimethylalkylamines and octanethiol on iron corrosion in anhydrous acetonitrile solution containing FeCl{sub 3}  

SciTech Connect (OSTI)

Polarization and impedance measurements were carried out on an iron electrode in an anhydrous acetonitrile solution of 0.1 M LiClO{sub 4} and 0.01 M FeCl{sub 3} containing organic corrosion inhibitors. The inhibitors investigated were N,N-dimethylalkylamines C{sub n}H{sub 2n+1}N(CH{sub 3}){sub 2} (C{sub n}DMA, n = 8, 12, 16, and 18) and octanethiol C{sub 8}H{sub 17}SH (C{sub 8}T). These compounds suppressed both cathodic and anodic processes of iron corrosion in the acetonitrile solution. The double-layer capacitances obtained from impedance data for the electrode inhibited with C{sub n}DMA were markedly lower in the potential region of the cathodic polarization curve than those for the uninhibited electrode. Ultraviolet and visible spectra of the FeCl{sub 3} acetonitrile solution containing C{sub n}DMA revealed the formation of a Fe{sup 3+} complex cation with C{sub n}DMA, and joint adsorption of the complex cation with Cl{sup {minus}} on the iron surface was substantiated by X-ray photoelectron spectroscopy of the surface treated with the solution. A surface thiolate of C{sub 8}T was formed by its chemisorption on the iron surface, resulting in a decrease in the double-layer capacitance and the cathodic and anodic current densities, respectively.

Aramaki, Kunitsugu; Kikuchi, Takeshi

2000-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

A new buffer system for the potentiometric determination of fluoride ion  

SciTech Connect (OSTI)

This paper attempts to eliminate the lengthy stage of hydrolytic separation of the elements during the potentiometric determination of fluoride ions and also to develop a universal method for the determination of flouride ions. During the development of a procedure for the determination of fluoride ions it is necessary to eliminate the interfering effects of elements which form stable fluoride complexes such as A1 (III), Fe (III), Si (III), Ti (IV), V (IV), Mo (V), and W (V). By the addition of diethylenetriaminepentaacetate to the buffer solution and preliminary extraction of the benzoylphenylhydroxylaminates of the interfering elements with chloroform it was possible to develop a method for the determination of fluoride with a detection limit of 1.10/sup -5/ M.

Zhobinskii, E.Y.; Askochenskaya, R.M.; Novikova, L.B; Wl' Figarov, O.S.

1985-05-01T23:59:59.000Z

142

Energy and momentum transfer of He atoms scattered from a lithium fluoride crystal surface  

E-Print Network [OSTI]

Energy and momentum transfer of He atoms scattered from a lithium fluoride crystal surface H. Legge­surface inter- action is usually described in terms of averaged properties such as the average energy exchange interaction potential has been extensivel

Manson, Joseph R.

143

Characterization Report on Sand, Slag, and Crucible Residues and on Fluoride Residues  

SciTech Connect (OSTI)

This paper reports on the chemical characterization of the sand, slag, and crucible (SS and C) residues and the fluoride residues that may be shipped from the Rocky Flats Environmental Technology Site (RFETS) to Savannah River Site (SRS).

Murray, A.M.

1999-02-10T23:59:59.000Z

144

E-Print Network 3.0 - aluminium fluorides Sample Search Results  

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

illustrated with interferograms of 1 1 849... performance than our present aluminium-magnesium fluoride coatings at 1800 A. As an example of what is now... ) consist of two S U B...

145

E-Print Network 3.0 - aluminum sodium fluoride Sample Search...  

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

Information Sciences 28 List of Acronyms, Abbreviations and Symbols Summary: Light Emitting Diode LiAlH4 lithium aluminum hydride LiF lithium fluoride LS Light Scattering...

146

Hydrogen energy systems studies  

SciTech Connect (OSTI)

In this report the authors describe results from technical and economic assessments carried out during the past year with support from the USDOE Hydrogen R&D Program. (1) Assessment of technologies for small scale production of hydrogen from natural gas. Because of the cost and logistics of transporting and storing hydrogen, it may be preferable to produce hydrogen at the point of use from more readily available energy carriers such as natural gas or electricity. In this task the authors assess near term technologies for producing hydrogen from natural gas at small scale including steam reforming, partial oxidation and autothermal reforming. (2) Case study of developing a hydrogen vehicle refueling infrastructure in Southern California. Many analysts suggest that the first widespread use of hydrogen energy is likely to be in zero emission vehicles in Southern California. Several hundred thousand zero emission automobiles are projected for the Los Angeles Basin alone by 2010, if mandated levels are implemented. Assuming that hydrogen vehicles capture a significant fraction of this market, a large demand for hydrogen fuel could evolve over the next few decades. Refueling a large number of hydrogen vehicles poses significant challenges. In this task the authors assess near term options for producing and delivering gaseous hydrogen transportation fuel to users in Southern California including: (1) hydrogen produced from natural gas in a large, centralized steam reforming plant, and delivered to refueling stations via liquid hydrogen truck or small scale hydrogen gas pipeline, (2) hydrogen produced at the refueling station via small scale steam reforming of natural gas, (3) hydrogen produced via small scale electrolysis at the refueling station, and (4) hydrogen from low cost chemical industry sources (e.g. excess capacity in refineries which have recently upgraded their hydrogen production capacity, etc.).

Ogden, J.M.; Kreutz, T.G.; Steinbugler, M. [Princeton Univ., NJ (United States)] [and others

1996-10-01T23:59:59.000Z

147

Method for removal of plutonium impurity from americium oxides and fluorides  

DOE Patents [OSTI]

Method for removal of plutonium impurity from americium oxides and fluorides. AmF.sub.4 is not further oxidized to AmF.sub.6 by the application of O.sub.2 F at room temperature, while plutonium compounds present in the americium sample are fluorinated to volatile PuF.sub.6, which can readily be separated therefrom, leaving the purified americium oxides and/or fluorides as the solid tetrafluoride.

FitzPatrick, John R. (Los Alamos, NM); Dunn, Jerry G. (Los Alamos, NM); Avens, Larry R. (Los Alamos, NM)

1987-01-01T23:59:59.000Z

148

Method for removal of plutonium impurity from americium oxides and fluorides  

DOE Patents [OSTI]

Method for removal of plutonium impurity from americium oxides and fluorides. AmF/sub 4/ is not further oxidized to AmF/sub 6/ by the application of O/sub 2/F at room temperature thereto, while plutonium compounds present in the americium sample are fluorinated to volatile PuF/sub 6/, which can readily be separated therefrom, leaving the purified americium oxides and/or fluorides as the solid tetrafluoride thereof.

FitzPatrick, J.R.; Dunn, J.G.; Avens, L.R.

1987-02-13T23:59:59.000Z

149

Physical approaches to controlling the fluoride content of fish protein concentrate  

E-Print Network [OSTI]

by the co-current batch extraction process previously described under section B of this chapter. The re- sulting extracted solids were air dried and retained for ash and fluoride determination. F. Analytical Methods Fluoride contents of the FPC samples... INTRODUCTION LITERATURE REVIEW METHODS AND MATERIALS A. Raw Materials B. Extraction Technique C. Grinding of Coarse FPC D. Selective Screening and Air Classification E. Flotation Approaches F. Analytical Methods 10 RESULTS 13 DIS CUSS ION 33 SUMMARY...

Rahman, Muhammad Asadur

1968-01-01T23:59:59.000Z

150

Hydrogen Bus Technology Validation Program  

E-Print Network [OSTI]

and evaluate hydrogen enriched natural gas (HCNG) enginewas to demonstrate that hydrogen enriched natural gas (HCNG)characteristics of hydrogen enriched natural gas combustion,

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

2005-01-01T23:59:59.000Z

151

The Bumpy Road to Hydrogen  

E-Print Network [OSTI]

will trump hydrogen and fuel cell vehicles. Advocates ofbenefits sooner than hydrogen and fuel cells ever could.emissions from a hydrogen fuel cell vehicle will be about

Sperling, Dan; Ogden, Joan M

2006-01-01T23:59:59.000Z

152

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

153

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

154

Influence of uranium on corrosion of stainless steel in solutions of fluoride in nitric acid  

SciTech Connect (OSTI)

Stainless steels corrode rapidly in solutions of fluoride in nitric acid; the higher the fluoride ion content, the more intense is the corrosion. The activating effect of the fluoride ions mainly reduces to dissolution of the oxide films. Small amounts somewhat retard the cathodic reduction of HNO/sub 3/. In this report the authors provide the results of an investigation of the influence of uranium ions on the corrosion-electrochemical behavior of stainless steel 12Kh18N10T in solutions of up to 10 moles/liter of HNO/sub 3/, with fluoride ions up to 0.1 mole/liter. The authors conclude that the retardation of corrosion of stainless steel by uranium, zirconium and aluminum ions in solutions of fluorides in nitric acid is mainly due to the formation of strong complexes of these metals with fluorine ions, leading to a reduction of the number of free HF molecules in the solution. The stronger the complex of metal with fluorine, the higher the corrosion resistance of the stainless steel in a solution of fluoride in nitric acid.

Kurtenov, M.M.

1985-09-01T23:59:59.000Z

155

Process for the production of high purity zirconium tetrafluoride and other fluorides  

SciTech Connect (OSTI)

This patent describes a process for producing metal fluorides for low optical loss glass applications selected from the group. It comprises: aluminum trifluoride, hafnium tetrafluoride and zirconium tetrafluoride. The steps comprise: incompletely reacting reactants of a fluorinating agent selected from the group consisting of F{sub 2}, NF{sub 3}, N{sub 2}F{sub 2}, N{sub 2}F{sub 4}, ClF{sub 3}, BrF{sub 3}, IF{sub 5} and SF{sub 4} and a metal selected from the group consisting of aluminum, hafnium and zirconium, or the corresponding metal's compound to produce a reaction product comprising the metal fluoride and at least an amount of the residual metal or its compound effective to react with any metal fluoride impurities in the reactants, and separating the metal fluoride from the reaction product by heating the reaction product to selectively vaporize the metal fluoride for separate recovery from the reaction product and to react the residual metal or its compound with the metal fluoride impurities.

Withers, H.P.; Woytek, A.J.; Lileck, J.T.

1991-01-08T23:59:59.000Z

156

Hydrogen Delivery Technologies and Pipeline Transmission of Hydrogen  

E-Print Network [OSTI]

Hydrogen Delivery Technologies and Systems Pipeline Transmission of Hydrogen Strategic Initiatives, and Infrastructure Technologies Program #12;Pipeline Transmission of Hydrogen --- 2 Copyright: Design & Operation development) #12;Pipeline Transmission of Hydrogen --- 3 Copyright: Future H2 Infrastructure Wind Powered

157

Gaseous Hydrogen Delivery Breakout- Strategic Directions for Hydrogen Delivery Workshop  

Broader source: Energy.gov [DOE]

Targets, barriers and research and development priorities for gaseous delivery of hydrogen through hydrogen and natural gas pipelines.

158

DOE Hydrogen Program Overview  

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

Intl. J. Hydrogen Energy 27: 1217-1228 Melis A, Seibert M and Happe T (2004) Genomics of green algal hydrogen research. Photosynth. Res. 82: 277- 288 Maness P-C, Smolinski...

159

Gaseous Hydrogen Delivery Breakout  

E-Print Network [OSTI]

Gaseous Hydrogen Delivery Breakout Strategic Directions for Hydrogen Delivery Workshop May 7 detection Pipeline Safety: odorants, flame visibility Compression: cost, reliability #12;Breakout Session goal of a realistic, multi-energy distribution network model Pipeline Technology Improved field

160

Hydrogen transport membranes  

DOE Patents [OSTI]

Composite hydrogen transport membranes, which are used for extraction of hydrogen from gas mixtures are provided. Methods are described for supporting metals and metal alloys which have high hydrogen permeability, but which are either too thin to be self supporting, too weak to resist differential pressures across the membrane, or which become embrittled by hydrogen. Support materials are chosen to be lattice matched to the metals and metal alloys. Preferred metals with high permeability for hydrogen include vanadium, niobium, tantalum, zirconium, palladium, and alloys thereof. Hydrogen-permeable membranes include those in which the pores of a porous support matrix are blocked by hydrogen-permeable metals and metal alloys, those in which the pores of a porous metal matrix are blocked with materials which make the membrane impervious to gases other than hydrogen, and cermets fabricated by sintering powders of metals with powders of lattice-matched ceramic.

Mundschau, Michael V.

2005-05-31T23:59:59.000Z

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

Hydrogen Fuel Quality (Presentation)  

SciTech Connect (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

162

Hydrogen Technologies Safety Guide  

SciTech Connect (OSTI)

The purpose of this guide is to provide basic background information on hydrogen technologies. It is intended to provide project developers, code officials, and other interested parties the background information to be able to put hydrogen safety in context. For example, code officials reviewing permit applications for hydrogen projects will get an understanding of the industrial history of hydrogen, basic safety concerns, and safety requirements.

Rivkin, C.; Burgess, R.; Buttner, W.

2015-01-01T23:59:59.000Z

163

Webinar: Hydrogen Refueling Protocols  

Broader source: Energy.gov [DOE]

Video recording and text version of the webinar titled, Hydrogen Refueling Protocols, originally presented on February 22, 2013.

164

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 Transmission of Hydrogen --- 3 Copyright: #12;Pipeline Transmission of Hydrogen --- 4 Copyright: 3. Special

165

Hydrogen Production CODES & STANDARDS  

E-Print Network [OSTI]

Hydrogen Production DELIVERY FUEL CELLS STORAGE PRODUCTION TECHNOLOGY VALIDATION CODES & STANDARDS for 2010 · Reduce the cost of distributed production of hydrogen from natural gas and/or liquid fuels to $1 SYSTEMS INTEGRATION / ANALYSES SAFETY EDUCATION RESEARCH & DEVELOPMENT Economy Pete Devlin #12;Hydrogen

166

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

167

Hydrogen Delivery Liquefaction and Compression  

Broader source: Energy.gov [DOE]

Hydrogen Delivery Liquefaction and Compression - Overview of commercial hydrogen liquefaction and compression and opportunities to improve efficiencies and reduce cost.

168

Alternative Transportation Technologies: Hydrogen, Biofuels,...  

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

Transportation Technologies: Hydrogen, Biofuels, Advanced Efficiency, and Plug-in Hybrid Electric Vehicles Alternative Transportation Technologies: Hydrogen, Biofuels, Advanced...

169

Hydrogen separation process  

DOE Patents [OSTI]

A method for separating a hydrogen-rich product stream from a feed stream comprising hydrogen and at least one carbon-containing gas, comprising feeding the feed stream, at an inlet pressure greater than atmospheric pressure and a temperature greater than 200.degree. C., to a hydrogen separation membrane system comprising a membrane that is selectively permeable to hydrogen, and producing a hydrogen-rich permeate product stream on the permeate side of the membrane and a carbon dioxide-rich product raffinate stream on the raffinate side of the membrane. A method for separating a hydrogen-rich product stream from a feed stream comprising hydrogen and at least one carbon-containing gas, comprising feeding the feed stream, at an inlet pressure greater than atmospheric pressure and a temperature greater than 200.degree. C., to an integrated water gas shift/hydrogen separation membrane system wherein the hydrogen separation membrane system comprises a membrane that is selectively permeable to hydrogen, and producing a hydrogen-rich permeate product stream on the permeate side of the membrane and a carbon dioxide-rich product raffinate stream on the raffinate side of the membrane. A method for pretreating a membrane, comprising: heating the membrane to a desired operating temperature and desired feed pressure in a flow of inert gas for a sufficient time to cause the membrane to mechanically deform; decreasing the feed pressure to approximately ambient pressure; and optionally, flowing an oxidizing agent across the membrane before, during, or after deformation of the membrane. A method of supporting a hydrogen separation membrane system comprising selecting a hydrogen separation membrane system comprising one or more catalyst outer layers deposited on a hydrogen transport membrane layer and sealing the hydrogen separation membrane system to a porous support.

Mundschau, Michael (Longmont, CO); Xie, Xiaobing (Foster City, CA); Evenson, IV, Carl (Lafayette, CO); Grimmer, Paul (Longmont, CO); Wright, Harold (Longmont, CO)

2011-05-24T23:59:59.000Z

170

Anti-Hydrogen Jonny Martinez  

E-Print Network [OSTI]

Anti-Hydrogen Jonny Martinez University of California, Berkeley #12;OUTLINE WHAT IS ANTI-HYDROGEN? HISTORY IMPORTANCE THEORY HOW TO MAKE ANTI-HYDROGEN OTHER ANTI-MATTER EXPERIMENTS CONCLUSION #12;WHAT IS ANTI-HYDROGEN? Anti-hydrogen is composed of a Positron(anti-electron) and anti-Proton. Anti-Hydrogen

Budker, Dmitry

171

Method for producing hydrogen  

SciTech Connect (OSTI)

In a method for producing high quality hydrogen, the carbon monoxide level of a hydrogen stream which also contains hydrogen sulfide is shifted in a bed of iron oxide shift catalyst to a desired low level of carbon monoxide using less catalyst than the minimum amount of catalyst which would otherwise be required if there were no hydrogen sulfide in the gas stream. Under normal operating conditions the presence of even relatively small amounts of hydrogen sulfide can double the activity of the catalyst such that much less catalyst may be used to do the same job.

Preston, J.L.

1980-02-26T23:59:59.000Z

172

Large area electron beam pumped krypton fluoride laser amplifier  

SciTech Connect (OSTI)

Nike is a recently completed multi-kilojoule krypton fluoride (KrF) laser that has been built to study the physics of direct drive inertial confinement fusion. This paper describes in detail both the pulsed power and optical performance of the largest amplifier in the Nike laser, the 60 cm amplifier. This is a double pass, double sided, electron beam-pumped system that amplifies the laser beam from an input of 50 J to an output of up to 5 kJ. It has an optical aperture of 60 cm {times} 60 cm and a gain length of 200 cm. The two electron beams are 60 cm high {times} 200 cm wide, have a voltage of 640 kV, a current of 540 kA, and a flat top power pulse duration of 250 ns. A 2 kG magnetic field is used to guide the beams and prevent self-pinching. Each electron beam is produced by its own Marx/pulse forming line system. The amplifier has been fully integrated into the Nike system and is used on a daily basis for laser-target experiments. {copyright} {ital 1997 American Institute of Physics.}

Sethian, J.D.; Obenschain, S.P.; Gerber, K.A.; Pawley, C.J.; Serlin, V.; Sullivan, C.A. [Plasma Physics Division, Naval Research Laboratory, Washington DC 20375 (United States)] [Plasma Physics Division, Naval Research Laboratory, Washington DC 20375 (United States); Webster, W. [Research Support Instruments, 4325-B Forbes Boulevard, Lanham, Maryland 20706 (United States)] [Research Support Instruments, 4325-B Forbes Boulevard, Lanham, Maryland 20706 (United States); Deniz, A.V.; Lehecka, T. [Science Applications International Corporation, 1710 Goodridge Drive, McLean, Virginia 22102 (United States)] [Science Applications International Corporation, 1710 Goodridge Drive, McLean, Virginia 22102 (United States); McGeoch, M.W. [PLEX Corporation, 21 Addington Road, Brookline, Massachusetts 02146 (United States)] [PLEX Corporation, 21 Addington Road, Brookline, Massachusetts 02146 (United States); Altes, R.A.; Corcoran, P.A.; Smith, I.D. [Pulse Sciences, Incorporated, 600 McCormick Street, San Leandro, California 94577 (United States)] [Pulse Sciences, Incorporated, 600 McCormick Street, San Leandro, California 94577 (United States); Barr, O.C. [Pharos Technical Enterprises, 1603 Barcelona Street, Livermore, California 94550 (United States)] [Pharos Technical Enterprises, 1603 Barcelona Street, Livermore, California 94550 (United States)

1997-06-01T23:59:59.000Z

173

HYDROGEN USAGE AND STORAGE  

E-Print Network [OSTI]

It is thought that it will be useful to inform society and people who are interested in hydrogen energy. The study below has been prepared due to this aim can be accepted as an article to exchange of information between people working on this subject. This study has been presented to reader to be utilized as a “technical note”. Main Energy sources coal, petroleum and natural gas are the fossil fuels we use today. They are going to be exhausted since careless usage in last decades through out the world, and human being is going to face the lack of energy sources in the near future. On the other hand as the fossil fuels pollute the environment makes the hydrogen important for an alternative energy source against to the fossil fuels. Due to the slow progress in hydrogen’s production, storage and converting into electrical energy experience, extensive usage of Hydrogen can not find chance for applications in wide technological practices. Hydrogen storage stands on an important point in the development of Hydrogen energy Technologies. Hydrogen is volumetrically low energy concentration fuel. Hydrogen energy, to meet the energy quantity necessary for the nowadays technologies and to be accepted economically and physically against fossil fuels, Hydrogen storage technologies have to be developed in this manner. Today the most common method in hydrogen storage may be accepted as the high pressurized composite tanks. Hydrogen is stored as liquid or gaseous phases. Liquid hydrogen phase can be stored by using composite tanks under very high pressure conditions. High technology composite material products which are durable to high pressures, which should not be affected by hydrogen embrittlement and chemical conditions.[1

174

Hydrogen Filling Station  

SciTech Connect (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

175

Hydrogen Energy Stations: Poly-Production of Electricity, Hydrogen, and Thermal Energy  

E-Print Network [OSTI]

psi) High-pressure hydrogen compressor Compressed hydrogen2005 High-pressure hydrogen compressor Compressed hydrogenthe hydrogen, a hydrogen compressor, high-pressure tank

Lipman, Timothy; Brooks, Cameron

2006-01-01T23:59:59.000Z

176

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

177

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

178

Mechanical Properties of Aluminum Fluoride Glass Fibers James Colaizzi, M. John Matthewson, Tariq Iqbal, and Mahmoud R. Shahriari  

E-Print Network [OSTI]

#12;Mechanical Properties of Aluminum Fluoride Glass Fibers James Colaizzi, M. John Matthewson solutions of various pH values on the mechanical properties of polymer coated optical fibers of an aluminum to failure of the fiber. In static fatigue, the time to failure of the aluminum fluoride-based fibers

Matthewson, M. John

179

BP and Hydrogen Pipelines DOE Hydrogen Pipeline Working Group Workshop  

E-Print Network [OSTI]

BP and Hydrogen Pipelines DOE Hydrogen Pipeline Working Group Workshop August 30-31, 2005 Gary P · UK partnership opened the first hydrogen demonstration refueling station · Two hydrogen pipelines 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

180

Hawaii hydrogen power park Hawaii Hydrogen Power Park  

E-Print Network [OSTI]

. (Barrier R ­ Cost) Generate public interest & support. (Barrier S­Siting) #12;Hawaii hydrogen power park H Electrolyzer ValveManifold Water High Pressure H2 Storage Fuel Cell AC Power H2 Compressor Hydrogen Supply O2Hawaii hydrogen power park H Hawaii Hydrogen Power Park 2003 Hydrogen & Fuel Cells Merit Review

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


181

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

182

Ion assisted deposition of optical and protective coatings for heavy metal fluoride glass  

SciTech Connect (OSTI)

Heavy metal fluoride glass materials are attractive for optical applications in the near UV through IR wavelength regions. However, many compositions are relatively soft and hygroscopic and possess low softening temperature (250--300/sup 0/C). We have applied ion assisted deposition (IAD) techniques to deposit MgF/sub 2/, SiO/sub 2/, and Al/sub 2/O/sub 3//SiO/sub 2/ thin film structures on fluoride glass substrates at ambient substrate temperature (--100/sup 0/C). The coatings deposited using IAD improve the environmental durability of the fluoride glass and appear to have reasonably good optical characteristics; without application of IAD, the deposited coatings are not durable and have poor adhesion.

McNally, J.J.; Al-Jumaily, G.A.; McNeil, J.R.

1986-06-15T23:59:59.000Z

183

High Pressure Hydrogen Materials Compatibility of Piezoelectric...  

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

Pressure Hydrogen Materials Compatibility of Piezoelectric Films. High Pressure Hydrogen Materials Compatibility of Piezoelectric Films. Abstract: Abstract: Hydrogen is being...

184

Hydrogen powered bus  

ScienceCinema (OSTI)

Take a ride on a new type of bus, fueled by hydrogen. These hydrogen taxis are part of a Department of Energy-funded deployment of hydrogen powered vehicles and fueling infrastructure at nine federal facilities across the country to demonstrate this market-ready advanced technology. Produced and leased by Ford Motor Company , they consist of one 12- passenger bus and one nine-passenger bus. More information at: http://go.usa.gov/Tgr

None

2013-11-22T23:59:59.000Z

185

Hydrogen energy systems studies  

SciTech Connect (OSTI)

For several years, researchers at Princeton University`s Center for Energy and Environmental Studies have carried out technical and economic assessments of hydrogen energy systems. Initially, we focussed on the long term potential of renewable hydrogen. More recently we have explored how a transition to renewable hydrogen might begin. The goal of our current work is to identify promising strategies leading from near term hydrogen markets and technologies toward eventual large scale use of renewable hydrogen as an energy carrier. Our approach has been to assess the entire hydrogen energy system from production through end-use considering technical performance, economics, infrastructure and environmental issues. This work is part of the systems analysis activity of the DOE Hydrogen Program. In this paper we first summarize the results of three tasks which were completed during the past year under NREL Contract No. XR-11265-2: in Task 1, we carried out assessments of near term options for supplying hydrogen transportation fuel from natural gas; in Task 2, we assessed the feasibility of using the existing natural gas system with hydrogen and hydrogen blends; and in Task 3, we carried out a study of PEM fuel cells for residential cogeneration applications, a market which might have less stringent cost requirements than transportation. We then give preliminary results for two other tasks which are ongoing under DOE Contract No. DE-FG04-94AL85803: In Task 1 we are assessing the technical options for low cost small scale production of hydrogen from natural gas, considering (a) steam reforming, (b) partial oxidation and (c) autothermal reforming, and in Task 2 we are assessing potential markets for hydrogen in Southern California.

Ogden, J.M.; Steinbugler, M.; Dennis, E. [Princeton Univ., NJ (United States)] [and others

1995-09-01T23:59:59.000Z

186

Preventing Theft of Anhydrous Ammonia  

E-Print Network [OSTI]

to occur in waves, with thieves striking the same location several times. Thefts have occurred at such unlikely places as refrig- eration systems, underground pipelines and rail cars. However, most criminals steal from above-ground tanks on farms... such as bottles or tanks may be left behind; these pose a risk to anyone who comes across them and handles them. Signs of Theft Evidence of theft includes valves not tightly closed or that seem to have been tampered with, footprints in the soil, and tire...

Smith, David

2004-09-16T23:59:59.000Z

187

Hydrogen | Department of Energy  

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

electric cooperatives* to offer net metering to customers who generate electricity using solar energy, wind energy, hydropower, hydrogen, biomass, landfill gas, geothermal energy,...

188

Renewable Hydrogen (Presentation)  

SciTech Connect (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

189

Hydrogen Industrial Trucks  

Broader source: Energy.gov [DOE]

Slides from the U.S. Department of Energy Hydrogen Component and System Qualification Workshop held November 4, 2010 in Livermore, CA.

190

Hydrogen purification system  

DOE Patents [OSTI]

The present invention provides a system to purify hydrogen involving the use of a hydride compressor and catalytic converters combined with a process controller.

Golben, Peter Mark

2010-06-15T23:59:59.000Z

191

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.

192

Department of Energy - Hydrogen  

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

Goes to.... Lighting Up Operations with Hydrogen and Fuel Cell Technology http:energy.goveerearticlesand-oscar-sustainable-mobile-lighting-goes-lighting-operations-hydro...

193

Sustainable hydrogen production  

SciTech Connect (OSTI)

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

194

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

195

Thin film hydrogen sensor  

DOE Patents [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

196

Hydrogen Delivery - Basics | Department of Energy  

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

Delivery Hydrogen Delivery - Basics Hydrogen Delivery - Basics Photo of light-duty vehicle at hydrogen refueling station. Infrastructure is required to move hydrogen from the...

197

Numerical investigation of mid-infrared Raman soliton source generation in endless single mode fluoride fibers  

SciTech Connect (OSTI)

We numerically investigate Raman soliton generation in a fluoride photonic crystal fiber (PCF) pumped by 1.93 ?m femtosecond fiber lasers in order to get widely tunable laser source in the mid-infrared region. The simulated results show that a continuously tunable range (1.93???3.95??m) over 2000?nm is achieved in 1-m-long fluoride PCF pumped by a 1.93??m femtosecond fiber laser with a pulse width of 200 fs. The power conversion efficiency is also calculated and the maximum efficiency can be up to 84.27%.

Liu, Lai; Qin, Guan-Shi, E-mail: qings@jlu.edu.cn; Tian, Qi-jun; Zhao, Dan; Qin, Wei-Ping, E-mail: wpqin@jlu.edu.cn [State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012 (China)

2014-04-28T23:59:59.000Z

198

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

199

Enhancing hydrogen spillover and storage  

SciTech Connect (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

200

Electrochemical hydrogen Storage Systems  

SciTech Connect (OSTI)

As the global need for energy increases, scientists and engineers have found a possible solution by using hydrogen to power our world. Although hydrogen can be combusted as a fuel, it is considered an energy carrier for use in fuel cells wherein it is consumed (oxidized) without the production of greenhouse gases and produces electrical energy with high efficiency. Chemical storage of hydrogen involves release of hydrogen in a controlled manner from materials in which the hydrogen is covalently bound. Sodium borohydride and aminoborane are two materials given consideration as chemical hydrogen storage materials by the US Department of Energy. A very significant barrier to adoption of these materials as hydrogen carriers is their regeneration from 'spent fuel,' i.e., the material remaining after discharge of hydrogen. The U.S. Department of Energy (DOE) formed a Center of Excellence for Chemical Hydrogen Storage, and this work stems from that project. The DOE has identified boron hydrides as being the main compounds of interest as hydrogen storage materials. The various boron hydrides are then oxidized to release their hydrogen, thereby forming a 'spent fuel' in the form of a lower boron hydride or even a boron oxide. The ultimate goal of this project is to take the oxidized boron hydrides as the spent fuel and hydrogenate them back to their original form so they can be used again as a fuel. Thus this research is essentially a boron hydride recycling project. In this report, research directed at regeneration of sodium borohydride and aminoborane is described. For sodium borohydride, electrochemical reduction of boric acid and sodium metaborate (representing spent fuel) in alkaline, aqueous solution has been investigated. Similarly to literature reports (primarily patents), a variety of cathode materials were tried in these experiments. Additionally, approaches directed at overcoming electrostatic repulsion of borate anion from the cathode, not described in the previous literature for electrochemical reduction of spent fuels, have been attempted. A quantitative analytical method for measuring the concentration of sodium borohydride in alkaline aqueous solution has been developed as part of this work and is described herein. Finally, findings from stability tests for sodium borohydride in aqueous solutions of several different compositions are reported. For aminoborane, other research institutes have developed regeneration schemes involving tributyltin hydride. In this report, electrochemical reduction experiments attempting to regenerate tributyltin hydride from tributyltin chloride (a representative by-product of the regeneration scheme) are described. These experiments were performed in the non-aqueous solvents acetonitrile and 1,2-dimethoxyethane. A non-aqueous reference electrode for electrolysis experiments in acetonitrile was developed and is described. One class of boron hydrides, called polyhedral boranes, became of interest to the DOE due to their ability to contain a sufficient amount of hydrogen to meet program goals and because of their physical and chemical safety attributes. Unfortunately, the research performed here has shown that polyhedral boranes do not react in such a way as to allow enough hydrogen to be released, nor do they appear to undergo hydrogenation from the spent fuel form back to the original hydride. After the polyhedral boranes were investigated, the project goals remained the same but the hydrogen storage material was switched by the DOE to ammonia borane. Ammonia borane was found to undergo an irreversible hydrogen release process, so a direct hydrogenation was not able to occur. To achieve the hydrogenation of the spent ammonia borane fuel, an indirect hydrogenation reaction is possible by using compounds called organotin hydrides. In this process, the organotin hydrides will hydrogenate the spent ammonia borane fuel at the cost of their own oxidation, which forms organotin halides. To enable a closed-loop cycle, our task was then to be able to hydrogenate the organotin halides back to th

Dr. Digby Macdonald

2010-08-09T23:59:59.000Z

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


201

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

202

Membrane for hydrogen recovery from streams containing hydrogen sulfide  

DOE Patents [OSTI]

A membrane for hydrogen recovery from streams containing hydrogen sulfide is provided. The membrane comprises a substrate, a hydrogen permeable first membrane layer deposited on the substrate, and a second membrane layer deposited on the first layer. The second layer contains sulfides of transition metals and positioned on the on a feed side of the hydrogen sulfide stream. The present invention also includes a method for the direct decomposition of hydrogen sulfide to hydrogen and sulfur.

Agarwal, Pradeep K.

2007-01-16T23:59:59.000Z

203

Hydrogen, Fuel Cells & Infrastructure Technologies ProgramHydrogen, Fuel Cells & Infrastructure Technologies Program Hydrogen Codes &  

E-Print Network [OSTI]

for hydrogen refueling and storage, by 2006; · Complete and adopt the revised NFPA 55 standard for hydrogen storage of hydrogen, by 2008; · Complete U.S. adoption of a Global Technical Regulation (GTR) for hydrogen, storage, and use of hydrogen incorporate project safety requirements into the procurements, by 2005

204

Thick film hydrogen sensor  

DOE Patents [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

205

August 2006 Hydrogen Program  

E-Print Network [OSTI]

after the date of enactment of this Act, the Secretary shall submit to Congress a report evaluating's primary transportation fuel from petroleum, which is increasingly imported, to hydrogen, which can the energy, environmental and economic benefits of a hydrogen economy. The goals and milestones

206

Hydrogen, Fuel Infrastructure  

E-Print Network [OSTI]

results of using hydrogen power, of course, will be energy independence for this nation... think about between hydrogen and oxygen generates energy, which can be used to power a car producing only water to taking these cars from laboratory to showroom so that the first car driven by a child born today could

207

Hydrogen Delivery- Current Technology  

Broader source: Energy.gov [DOE]

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 trailers, or by rail or barge. Read on to learn more about current hydrogen delivery and storage technologies.

208

Renewable Resources for Hydrogen (Presentation)  

SciTech Connect (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

209

Hydrogen in semiconductors and insulators  

E-Print Network [OSTI]

type can be applied to hydrogen storage materials. Keywords:can be applied to hydrogen storage materials. Manuscript O-of the formalism to hydrogen storage materials. A partial

Van de Walle, Chris G.

2007-01-01T23:59:59.000Z

210

The Bumpy Road to Hydrogen  

E-Print Network [OSTI]

in the cost of hydrogen production, distribution, and use.accelerate R&D of zero-emission hydrogen production methods.Renewable hydrogen production is a key area for focused

Sperling, Dan; Ogden, Joan M

2006-01-01T23:59:59.000Z

211

Hydrogen from Coal Edward Schmetz  

E-Print Network [OSTI]

Turbines Carbon Capture & Sequestration Carbon Capture & Sequestration The Hydrogen from Coal Program Cells, Turbines, and Carbon Capture & Sequestration #12;Production Goal for Hydrogen from Coal Central Separation System PSA Membrane Membrane Carbon Sequestration Yes (87%) Yes (100%) Yes (100%) Hydrogen

212

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

213

Hydrogen Fuel Quality  

SciTech Connect (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

214

Hydrogen Data Book from the Hydrogen Analysis Resource Center  

DOE Data Explorer [Office of Scientific and Technical Information (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

215

Turing Water into Hydrogen Fuel  

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

Turning Water into Hydrogen Fuel Turning Water into Hydrogen Fuel New method creates highly reactive catalytic surface, packed with hydroxyl species May 15, 2012 | Tags: Franklin,...

216

Compatibility of Inconel 617 alloy with eutectic fluoride salts at high temperatures  

SciTech Connect (OSTI)

Thermal Energy Storage (TES) capsules made of Inconel 617 alloy were filled with high purity eutectic fluoride salts and thermally cycled at eutectic temperature [plus minus]100 K for a period of up to 50,000 hours. The containment life performance characteristics with fluoride salts were examined. The depletion of Al and Cr near the inner edges was found. Atomic Absorption Spectroscopy revealed that both Al and Cr were dissolved in the fluoride salts at high temperatures. The changes in melting temperature and heat of fusion of fluoride salts during thermal cycling were measured with Thermal Differential Analysis. A modified diffusion equation for a one-dimensional semi-infinite bar was applied to the depletion of Al on the interior surfaces of the containers. Good agreement was obtained between the analysis and the measured concentration profiles. The present study suggests that the corrosion was a diffusion controlled process and an expected lifetime of 5--7 years is reasonable and predictable based upon the limited diffusion processes.

Luo, A.; Jacobson, D.L. (Department of Chemical, Bio Materials Engineering, Arizona State University, Tempe, Arizona 85287-6006 (United States)); Ponnappan, R. (Universal Energy Systems, Inc., 4401 Dayton-Xenia Road, Dayton, Ohio 45432 (United States))

1993-01-10T23:59:59.000Z

217

Primary aluminum: statistical analysis of potline fluoride emissions and alternate sampling frequency. Final report  

SciTech Connect (OSTI)

Statistical analyses were performed on 4 years of fluoride emissions data from a primary aluminum reduction plant. These analyses were used to develop formulae and procedures for use by regulatory agencies in determining alternate sampling frequencies for secondary (roof monitor) emissions testing on a case-by-case basis. Monitoring procedures for ensuring compliance even with a reduced test frequency are also addressed.

Not Available

1986-10-01T23:59:59.000Z

218

Conformational Properties of Poly(vinylidene fluoride). A Quantum Chemistry Study of Model Compounds  

E-Print Network [OSTI]

Conformational Properties of Poly(vinylidene fluoride). A Quantum Chemistry Study of Model of the conformers of HFH resembling crystalline polymorphs of PVDF, indicating that intermolecular interactions unfavorable second-order interactions between fluorine atoms occur in -CH2- centered t+t+ sequences and

Utah, University of

219

Radiolytic Effects on Fluoride Impurities in a U{sub 3}O{sub 8} Matrix  

SciTech Connect (OSTI)

The safe handling and storage of radioactive materials require an understanding of the effects of radiolysis on those materials. Radiolysis may result in the production of gases (e.g., corrosives) or pressures that are deleterious to storage containers. A study has been performed to address these concerns as they relate to the radiolysis of residual fluoride compounds in uranium oxides.

Icenhour, A.S.

2000-05-01T23:59:59.000Z

220

PILOT-SCALE REMOVAL OF FLUORIDE FROM LEGACY PLUTONIUM MATERIALS USING VACUUM SALT DISTILLATION  

SciTech Connect (OSTI)

Between September 2009 and January 2011, the Savannah River National Laboratory (SRNL) and HB-Line designed, developed, tested, and successfully deployed a system for the distillation of chloride salts. In 2011, SRNL adapted the technology for the removal of fluoride from fluoride-bearing salts. The method involved an in situ reaction between potassium hydroxide (KOH) and the fluoride salt to yield potassium fluoride (KF) and the corresponding oxide. The KF and excess KOH can be distilled below 1000{deg}C using vacuum salt distillation (VSD). The apparatus for vacuum distillation contains a zone heated by a furnace and a zone actively cooled using either recirculated water or compressed air. During a vacuum distillation operation, a sample boat containing the feed material is placed into the apparatus while it is cool, and the system is sealed. The system is evacuated using a vacuum pump. Once a sufficient vacuum is attaned, heating begins. Volatile salts distill from the heated zone to the cooled zone where they condense, leaving behind the non-volatile material in the feed boat. Studies discussed in this report were performed involving the use of non-radioactive simulants in small-scale and pilot-scale systems as well as radioactive testing of a small-scale system with plutonium-bearing materials. Aspects of interest include removable liner design considerations, boat materials, in-line moisture absorption, and salt deposition.

Pierce, R. A.; Pak, D. J.

2012-09-11T23:59:59.000Z

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

Selective reflection spectroscopy of a vapour at a calcium fluoride interface  

E-Print Network [OSTI]

Selective reflection spectroscopy of a vapour at a calcium fluoride interface T. Passerat de Silans materials exhibit surface resonances located in the thermal infrared. This makes them interesting to search for a fundamental temperature dependence of the atom-surface interaction, originating in the near-field thermal

Paris-Sud XI, Université de

222

Neutron diffraction studies of antiferromagnetism in manganous fluoride and some isomorphous compounds  

E-Print Network [OSTI]

FLUORIDE AND SOME ISOMORPHOUS COMPOUNDS Major Subject: Physics 1 2 11 16 16 18 27 29 31 38 38 54 58 63 67 75 77 TABLE OF CONTENTS CHAPTER I. INTRODUCTION . . . ......................... II. MAGNETIC PROPERTY CONSIDERATIONS............... Ill. RELATIONS FOE THE MAGNETIC SCATTERING OF NEUTRONS IV. APPARATUS AND PROCEDURE................... . A. The Neutron Spectrometer.............. B. The Low Temperature Cryostat.......... C. Lov Temperature Coolants. . . . . . . . . D. Sample...

Erickson, Richard Ames

1952-01-01T23:59:59.000Z

223

Advancing the Hydrogen Safety Knowledge Base  

SciTech Connect (OSTI)

A White Paper of the International Energy Agency Hydrogen Implementing Agreement Task 31 - Hydrogen Safety

Weiner, Steven C.

2014-12-01T23:59:59.000Z

224

An Experimental Test Facility to Support Development of the Fluoride Salt Cooled High Temperature Reactor  

SciTech Connect (OSTI)

The need for high-temperature (greater than 600 C) energy exchange and delivery systems is significantly increasing as the world strives to improve energy efficiency and develop alternatives to petroleum-based fuels. Liquid fluoride salts are one of the few energy transport fluids that have the capability of operating at high temperatures in combination with low system pressures. The Fluoride Salt-Cooled High-Temperature Reactor design uses fluoride salt to remove core heat and interface with a power conversion system. Although a significant amount of experimentation has been performed with these salts, specific aspects of this reactor concept will require experimental confirmation during the development process. The experimental facility described here has been constructed to support the development of the Fluoride Salt Cooled High Temperature Reactor concept. The facility is capable of operating at up to 700 C and incorporates a centrifugal pump to circulate FLiNaK salt through a removable test section. A unique inductive heating technique is used to apply heat to the test section, allowing heat transfer testing to be performed. An air-cooled heat exchanger removes added heat. Supporting loop infrastructure includes a pressure control system; trace heating system; and a complement of instrumentation to measure salt flow, temperatures, and pressures around the loop. The initial experiment is aimed at measuring fluoride salt heat transfer inside a heated pebble bed similar to that used for the core of the pebble bed advanced high-temperature reactor. This document describes the details of the loop design, auxiliary systems used to support the facility, the inductive heating system, and facility capabilities.

Yoder Jr, Graydon L [ORNL] [ORNL; Aaron, Adam M [ORNL] [ORNL; Cunningham, Richard Burns [University of Tennessee, Knoxville (UTK)] [University of Tennessee, Knoxville (UTK); Fugate, David L [ORNL] [ORNL; Holcomb, David Eugene [ORNL] [ORNL; Kisner, Roger A [ORNL] [ORNL; Peretz, Fred J [ORNL] [ORNL; Robb, Kevin R [ORNL] [ORNL; Wilgen, John B [ORNL] [ORNL; Wilson, Dane F [ORNL] [ORNL

2014-01-01T23:59:59.000Z

225

Observation of Fractional Stokes-Einstein Behavior in the Simplest Hydrogen-bonded Liquid  

SciTech Connect (OSTI)

Quasielastic neutron scattering has been used to investigate the single-particle dynamics of hydrogen fluoride across its entire liquid range at ambient pressure. For T > 230 K, translational diffusion obeys the celebrated Stokes-Einstein relation, in agreement with nuclear magnetic resonance studies. At lower temperatures, we find significant deviations from the above behavior in the form of a power law with exponent xi = -0.71+/-0.05. More striking than the above is a complete breakdown of the Debye-Stokes-Einstein relation for rotational diffusion. Our findings provide the first experimental verification of fractional Stokes-Einstein behavior in a hydrogen-bonded liquid, in agreement with recent computer simulations.

Herwig, Kenneth W [ORNL; Molaison, Jamie J [ORNL; Fernandez-Alonso, F. [ISIS Facility, Rutherford Appleton Laboratory; Bermejo, F. J. [CSIC - Inst. Estructura de la Materia & Dept. of Electricity and Electronics; Turner, John F. C. [University of Tennessee, Knoxville (UTK); McLain, Sylvia E. [ISIS Facility, Rutherford Appleton Laboratory

2007-01-01T23:59:59.000Z

226

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

227

NREL's Hydrogen Program  

SciTech Connect (OSTI)

The research and development taking place today at the National Renewable Energy Laboratory (NREL) is paving the way for nature's most plentiful element—hydrogen—to power the next generation. NREL researchers are working to unlock the potential of hydrogen and to advance the fuel cell technologies that will power the automobiles, equipment, and buildings of tomorrow. Hydrogen and fuel cells are a fundamental part of the broader portfolio of renewable technologies that are moving our nation toward its goals of energy independence and sustainability.

None

2011-01-01T23:59:59.000Z

228

Hydrogen permeability and Integrity of hydrogen transfer pipelines  

E-Print Network [OSTI]

Hydrogen permeability and Integrity of hydrogen transfer pipelines Team: Sudarsanam Suresh Babu, Z Pressure Permeation Testing) Hydrogen Pipeline R&D, Project Review Meeting Oak Ridge National Laboratory direction and review) #12;Outline of the presentation Background Hydrogen delivery through steel pipelines

229

Hydrogen plasma enhanced crystallization of hydrogenated amorphous silicon films  

E-Print Network [OSTI]

Hydrogen plasma enhanced crystallization of hydrogenated amorphous silicon films K. Pangal,a) J. C August 1998; accepted for publication 21 October 1998 We report that a room temperature hydrogen plasma thermal crystallization of amorphous silicon time by a factor of five. Exposure to hydrogen plasma reduces

230

Uranium hexafluoride liquid thermal expansion, elusive eutectic with hydrogen fluoride, and very first production using chlorine trifluoride  

SciTech Connect (OSTI)

Three unusual incidents and case histories involving uranium hexafluoride in the enrichment facilities of the USA in the late 1940`s and early 1950`s are presented. The history of the measurements of the thermal expansion of liquids containing fluorine atoms within the molecule is reviewed with special emphasis upon uranium hexafluoride. A comparison is made between fluorinated esters, fluorocarbons, and uranium hexafluoride. The quantitative relationship between the thermal expansion coefficient, a, of liquids and the critical temperature, T{sub c} is presented. Uranium hexafluoride has an a that is very high in a temperature range that is used by laboratory and production workers - much higher than any other liquid measured. This physical property of UF{sub 6} has resulted in accidents involving filling the UF{sub 6} containers too full and then heating with a resulting rupture of the container. Such an incident at a uranium gaseous diffusion plant is presented. Production workers seldom {open_quotes}see{close_quotes} uranium hexafluoride. The movement of UF{sub 6} from one container to another is usually trailed by weight, not sight. Even laboratory scientists seldom {open_quotes}see{close_quotes} solid or liquid UF{sub 6} and this can be a problem at times. This inability to {open_quotes}see{close_quotes} the UF{sub 6}-HF mixtures in the 61.2{degrees}C to 101{degrees}C temperature range caused a delay in the understanding of the phase diagram of UF{sub 6}-HF which has a liquid - liquid immiscible region that made the eutectic composition somewhat elusive. Transparent fluorothene tubes solved the problem both for the UF{sub 6}-HF phase diagram as well as the UF{sub 6}-HF-CIF{sub 3} phase diagram with a miscibility gap starting at 53{degrees}C. The historical background leading to the first use of CIF{sub 3} to produce UF{sub 6} in both the laboratory and plant at K-25 is presented.

Rutledge, G.P. [Central Environmental, Inc., Anchorage, AK (United States)

1991-12-31T23:59:59.000Z

231

Hydrogen storage compositions  

DOE Patents [OSTI]

Compositions for hydrogen storage and methods of making such compositions employ an alloy that exhibits reversible formation/deformation of BH4- anions. The composition includes a ternary alloy including magnesium, boron and a metal and a metal hydride. The ternary alloy and the metal hydride are present in an amount sufficient to render the composition capable of hydrogen storage. The molar ratio of the metal to magnesium and boron in the alloy is such that the alloy exhibits reversible formation/deformation of BH4- anions. The hydrogen storage composition is prepared by combining magnesium, boron and a metal to prepare a ternary alloy and combining the ternary alloy with a metal hydride to form the hydrogen storage composition.

Li, Wen; Vajo, John J.; Cumberland, Robert W.; Liu, Ping

2011-04-19T23:59:59.000Z

232

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

233

The Hydrogen Connection  

SciTech Connect (OSTI)

As the world seeks to identify alternative energy sources, hydrogen and fuel cell technologies will offer a broad range of benefits for the environment, the economy and energy security.

Barilo, Nick F.

2014-05-01T23:59:59.000Z

234

Thin film hydrogen sensor  

DOE Patents [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. 6 figs.

Lauf, R.J.; Hoffheins, B.S.; Fleming, P.H.

1994-11-22T23:59:59.000Z

235

Webinar: Hydrogen Compatibility of Materials  

Broader source: Energy.gov [DOE]

Video recording of the webinar titled, Hydrogen Compatibility of Materials, originally presented on August 13, 2013.

236

Bulk Hydrogen Strategic Directions for  

E-Print Network [OSTI]

Bulk Hydrogen Storage Strategic Directions for Hydrogen Delivery Workshop May 7-8, 2003 Crystal City, Virginia #12;Breakout Session - Bulk Hydrogen Storage Main Themes/Caveats Bulk Storage = Anything storage is an economic solution to address supply/demand imbalance #12;Breakout Session - Bulk Hydrogen

237

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

238

CODE OF PRACTICE HYDROGEN SULFIDE  

E-Print Network [OSTI]

CODE OF PRACTICE HYDROGEN SULFIDE Rev January 2013 1 The following generic Code of Practice applies to all work areas within the University of Alberta that use hydrogen sulfide gas or where hydrogen response procedure requirements. All work areas where hydrogen sulfide is used or may be present within

Machel, Hans

239

Purdue Hydrogen Systems Laboratory  

SciTech Connect (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

240

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

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

Comparing air quality impacts of hydrogen and gasoline  

E-Print Network [OSTI]

pathway, with hydrogen production at refueling stations (with centralized hydrogen production and gaseous hydrogenwith centralized hydrogen production and liquid hydrogen (

Sperling, Dan; Wang, Guihua; Ogden, Joan M.

2008-01-01T23:59:59.000Z

242

Examining hydrogen transitions.  

SciTech Connect (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

243

Effect of Acidulated Phosphate Fluoride Gel on the Prevention of White Spot Lesions in Patients Undergoing Active Orthodontic Treatment  

E-Print Network [OSTI]

Introduction: The purpose of this study was to evaluate the effect of 1.23% acidulated phosphate fluoride (APF) gel on white spot lesion (WSL) formation utilizing a typical orthodontic treatment interval for the applications. Methods...

Hutto Fretty, Corneil Kimberly

2014-05-06T23:59:59.000Z

244

Investigation and design of a secure, transportable fluoride-salt-cooled high-temperature reactor (TFHR) for isolated locations  

E-Print Network [OSTI]

In this work we describe a preliminary design for a transportable fluoride salt cooled high temperature reactor (TFHR) intended for use as a variable output heat and electricity source for off-grid locations. The goals of ...

Macdonald, Ruaridh (Ruaridh R.)

2014-01-01T23:59:59.000Z

245

Impact of pH on the removal of fluoride, nitrate and boron by nanofiltration/reverse osmosis   

E-Print Network [OSTI]

The objective of this study was to evaluate the impact of pH on boron, fluoride, and nitrate retention by comparing modelled speciation predictions with retention using six different nanofiltration (NF) and reverse osmosis ...

Richards, Laura A.; Vuachère, Marion; Schäfer, Andrea

2010-01-01T23:59:59.000Z

246

Tritium production analysis and management strategies for a Fluoride-salt-cooled high-temperature test reactor (FHTR)  

E-Print Network [OSTI]

The Fluoride-salt-cooled High-temperature Test Reactor (FHTR) is a test reactor concept that aims to demonstrate the neutronics, thermal-hydraulics, materials, tritium management, and to address other reactor operational ...

Rodriguez, Judy N

2013-01-01T23:59:59.000Z

247

Preventing fuel failure for a beyond design basis accident in a fluoride salt cooled high temperature reactor  

E-Print Network [OSTI]

The fluoride salt-cooled high-temperature reactor (FHR) combines high-temperature coated-particle fuel with a high-temperature salt coolant for a reactor with unique market and safety characteristics. This combination can ...

Minck, Matthew J. (Matthew Joseph)

2013-01-01T23:59:59.000Z

248

Hydrogen storage and generation system  

DOE Patents [OSTI]

A system for storing and generating hydrogen generally and, in particular, a system for storing and generating hydrogen for use in an H.sub.2/O.sub.2 fuel cell. The hydrogen storage system uses the beta particles from a beta particle emitting material to degrade an organic polymer material to release substantially pure hydrogen. In a preferred embodiment of the invention, beta particles from .sup.63Ni are used to release hydrogen from linear polyethylene.

Dentinger, Paul M. (Sunol, CA); Crowell, Jeffrey A. W. (Castro Valley, CA)

2010-08-24T23:59:59.000Z

249

APPLICATION OF VACUUM SALT DISTILLATION TECHNOLOGY FOR THE REMOVAL OF FLUORIDE  

SciTech Connect (OSTI)

Vacuum distillation of chloride salts from plutonium oxide (PuO{sub 2}) and simulant PuO{sub 2} has been previously demonstrated at Department of Energy (DOE) sites using kilogram quantities of chloride salt. The apparatus for vacuum distillation contains a zone heated using a furnace and a zone actively cooled using either recirculated water or compressed air. During a vacuum distillation operation, a sample boat containing the feed material is placed into the apparatus while it is cool, and the system is sealed. The system is evacuated using a vacuum pump. Once a sufficient vacuum is attained, heating begins. Volatile salts distill from the heated zone to the cooled zone where they condense, leaving behind the non-volatile materials in the feed boat. The application of vacuum salt distillation (VSD) is of interest to the HB-Line Facility and the MOX Fuel Fabrication Facility (MFFF) at the Savannah River Site (SRS). Both facilities are involved in efforts to disposition excess fissile materials. Many of these materials contain chloride and fluoride salt concentrations which make them unsuitable for dissolution without prior removal of the chloride and fluoride salts. Between September 2009 and January 2011, the Savannah River National Laboratory (SRNL) and HB-Line designed, developed, tested, and successfully deployed a system for the distillation of chloride salts. Subsequent efforts are attempting to adapt the technology for the removal of fluoride. Fluoride salts of interest are less-volatile than the corresponding chloride salts. Consequently, an alternate approach is required for the removal of fluoride without significantly increasing the operating temperature. HB-Line Engineering requested SRNL to evaluate and demonstrate the feasibility of an alternate approach using both non-radioactive simulants and plutonium-bearing materials. Whereas the earlier developments targeted the removal of sodium chloride (NaCl) and potassium chloride (KCl), the current activities are concerned with the removal of the halide ions associated with plutonium trifluoride (PuF{sub 3}), plutonium tetrafluoride (PuF{sub 4}), calcium fluoride (CaF{sub 2}), and calcium chloride (CaCl{sub 2}). This report discusses non-radioactive testing of small-scale and pilot-scale systems and radioactive testing of a small-scale system. Experiments focused on demonstrating the chemistry for halide removal and addressing the primary engineering questions associated with a change in the process chemistry.

Pierce, R.; Pak, D.

2011-08-10T23:59:59.000Z

250

Specific interaction of fluoride ions with aluminum and gallium solvates in an ethylene glycol solutions  

SciTech Connect (OSTI)

The interaction of aluminum chloride and gallium chloride with KF in ethylene glycol solutions with F:M/sup 3 +/ mole ratios approximately equal to 2 includes a step involving the formation of fluorine-containing species, in which the fluoride ions are held in the outer sphere of ethylene glycol solvates of aluminum and gallium. Complexes based on hexacoordinate solvates predominate in the solutions of aluminum, while in the case of gallium, in contrast to aluminum, the coexistence of tetra- and hexacoordinate complexes is characteristic. The configurational equilibrium in the solutions of gallium is one of the causes of the structurization of the solutions, i.e., polymerization due to the formation of H bonds between the fluoride ions and the coordinated ethylene glycol molecules.

Petrosyants, S.P.; Tsabel', E.R.; Buslaev, Yu.A.

1986-01-01T23:59:59.000Z

251

Effect of fulvic acid on the kinetics of aluminum fluoride complexation in acidic waters  

SciTech Connect (OSTI)

Both fluoride ion and fulvic acid are important aluminum binding ligands present in soil and surface waters. As such they play a role in the speciation and toxicity of natural waters that have increased aluminum concentration due to acid precipitation. We report here a kinetic study of aluminum complexation in the presence of both of these naturally occurring ligands. An overall mechanism has been identified and rate constants have been obtained for several of the reactions involved. We find that an a priori model of the two ligands in competition for aluminum is incorrect. In fact, the rate of fluoride ion consumption is increased by the presence of fulvic acid. Evidence is presented that this effect is due to several equilibria, some of which involve mixed-ligand species. The important equilibria in this three-component system are identified and discussed, as are aluminum speciation and toxicity in acidic waters.

Plankey, B.J.; Patterson, H.H.

1988-12-01T23:59:59.000Z

252

Nuclear quantum effects in water exchange around lithium and fluoride ions  

E-Print Network [OSTI]

We employ classical and ring polymer molecular dynamics simulations to study the effect of nuclear quantum fluctuations on the structure and the water exchange dynamics of aqueous solutions of lithium and fluoride ions. While we obtain reasonably good agreement with experimental data for solutions of lithium by augmenting the Coulombic interactions between the ion and the water molecules with a standard Lennard-Jones ion-oxygen potential, the same is not true for solutions of fluoride, for which we find that a potential with a softer repulsive wall gives much better agreement. A small degree of destabilization of the first hydration shell is found in quantum simulations of both ions when compared with classical simulations, with the shell becoming less sharply defined and the mean residence time of the water molecules in the shell decreasing. In line with these modest differences, we find that the mechanisms of the exchange processes are unaffected by quantization, so a classical description of these reaction...

Wilkins, David M; Dang, Liem X

2015-01-01T23:59:59.000Z

253

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

254

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

255

Hydrogen production from carbonaceous material  

DOE Patents [OSTI]

Hydrogen is produced from solid or liquid carbon-containing fuels in a two-step process. The fuel is gasified with hydrogen in a hydrogenation reaction to produce a methane-rich gaseous reaction product, which is then reacted with water and calcium oxide in a hydrogen production and carbonation reaction to produce hydrogen and calcium carbonate. The calcium carbonate may be continuously removed from the hydrogen production and carbonation reaction zone and calcined to regenerate calcium oxide, which may be reintroduced into the hydrogen production and carbonation reaction zone. Hydrogen produced in the hydrogen production and carbonation reaction is more than sufficient both to provide the energy necessary for the calcination reaction and also to sustain the hydrogenation of the coal in the gasification reaction. The excess hydrogen is available for energy production or other purposes. Substantially all of the carbon introduced as fuel ultimately emerges from the invention process in a stream of substantially pure carbon dioxide. The water necessary for the hydrogen production and carbonation reaction may be introduced into both the gasification and hydrogen production and carbonation reactions, and allocated so as transfer the exothermic heat of reaction of the gasification reaction to the endothermic hydrogen production and carbonation reaction.

Lackner, Klaus S.; Ziock, Hans J.; Harrison, Douglas P.

2004-09-14T23:59:59.000Z

256

Combinatorial Approach for Hydrogen Storage Materials (presentation...  

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

Approach for Hydrogen Storage Materials (presentation) Combinatorial Approach for Hydrogen Storage Materials (presentation) Presented at the U.S. Department of Energy's Hydrogen...

257

Electrokinetic Hydrogen Generation from Liquid Water Microjets  

E-Print Network [OSTI]

currents and hydrogen production rates are shown to followmolecules. The hydrogen production efficiency is currentlycurrently available hydrogen production routes that can be

Duffin, Andrew M.; Saykally, Richard J.

2007-01-01T23:59:59.000Z

258

Hydrogen refueling station costs in Shanghai  

E-Print Network [OSTI]

pieces of hardware: 1. Hydrogen production equipment (e.g.when evaluating hydrogen production costs. Many analyses inrespect to size and hydrogen production method. These costs

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

2007-01-01T23:59:59.000Z

259

Renewable Hydrogen From Wind in California  

E-Print Network [OSTI]

Suitability for Hydrogen Production in the Sacramento Area” Renewable Energy  for Hydrogen Production in Californiamodel of renewable hydrogen production in California, which

Bartholomy, Obadiah

2005-01-01T23:59:59.000Z

260

Hydrogen Storage Materials Workshop Proceedings Workshop, October...  

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

hydrogen. Significant technical barriers remain for safe, cost-effective hydrogen storag compliqh2storworkproceedings.pdf More Documents & Publications Hydrogen Program...

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


261

Natural Gas and Hydrogen Infrastructure Opportunities Workshop...  

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

Natural Gas and Hydrogen Infrastructure Opportunities Workshop Agenda Natural Gas and Hydrogen Infrastructure Opportunities Workshop Agenda Agenda for the Natural Gas and Hydrogen...

262

Maximizing Light Utilization Efficiency and Hydrogen Production...  

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

in Microalgal Cultures, DOE Hydrogen Program FY 2010 Annual Progress Report Maximizing Light Utilization Efficiency and Hydrogen Production in Microalgal Cultures, DOE Hydrogen...

263

Hydrogen refueling station costs in Shanghai  

E-Print Network [OSTI]

exposure for hydrogen and fuel cell vehicle technologies.10 gasoline hybrids or 20 hydrogen fuel cell vehicles (eachwheels analysis of hydrogen based fuel-cell vehicle pathways

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

2007-01-01T23:59:59.000Z

264

Hydrogen Refueling Station Costs in Shanghai  

E-Print Network [OSTI]

exposure for hydrogen and fuel cell vehicle technologies10 gasoline hybrids or 20 hydrogen fuel cell vehicles (eachwheels analysis of hydrogen based fuel-cell vehicle pathways

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

2006-01-01T23:59:59.000Z

265

Hydrogen refueling station costs in Shanghai  

E-Print Network [OSTI]

High-pressure hydrogen compressor Compressed hydrogenapplies to hydrogen storage vessels and compressors. 2.4.4.vehicles. 3. Compressor: compresses hydrogen gas to achieve

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

2007-01-01T23:59:59.000Z

266

Hydrogen Refueling Station Costs in Shanghai  

E-Print Network [OSTI]

High-pressure hydrogen compressor Compressed hydrogento hydrogen storage vessels and compressors. Feedstock Costvehicles 3. Compressor: compresses hydrogen gas to achieve

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

2006-01-01T23:59:59.000Z

267

Strategic Directions for Hydrogen Delivery Workshop Proceedings  

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

including water or oil pipelines for hydrogen transport Assess viability of natural gas safety systems when hydrogen is introduced Conduct field demonstra- tion of hydrogen...

268

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

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

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

269

Considerations of Alloy N for Fluoride Salt-Cooled High-Temperature Reactor Applications  

SciTech Connect (OSTI)

Fluoride Salt-Cooled High-Temperature Reactors (FHRs) are a promising new class of thermal-spectrum nuclear reactors. The reactor structural materials must possess high-temperature strength and chemical compatibility with the liquid fluoride salt as well as with a power cycle fluid such as supercritical water while remaining resistant to residual air within the containment. Alloy N was developed for use with liquid fluoride salts and it possesses adequate strength and chemical compatibility up to about 700 C. A distinctive property of FHRs is that their maximum allowable coolant temperature is restricted by their structural alloy maximum service temperature. As the reactor thermal efficiency directly increases with the maximum coolant temperature, higher temperature resistant alloys are strongly desired. This paper reviews the current status of Alloy N and its relevance to FHRs including its design principles, development history, high temperature strength, environmental resistance, metallurgical stability, component manufacturability, ASME codification status, and reactor service requirements. The review will identify issues and provide guidance for improving the alloy properties or implementing engineering solutions.

Ren, Weiju [ORNL; Muralidharan, Govindarajan [ORNL; Wilson, Dane F [ORNL; Holcomb, David Eugene [ORNL

2011-01-01T23:59:59.000Z

270

Hydrogen production from microbial strains  

SciTech Connect (OSTI)

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

271

Hydrogen: Fueling the Future  

SciTech Connect (OSTI)

As our dependence on foreign oil increases and concerns about global climate change rise, the need to develop sustainable energy technologies is becoming increasingly significant. Worldwide energy consumption is expected to double by the year 2050, as will carbon emissions along with it. This increase in emissions is a product of an ever-increasing demand for energy, and a corresponding rise in the combustion of carbon containing fossil fuels such as coal, petroleum, and natural gas. Undisputable scientific evidence indicates significant changes in the global climate have occurred in recent years. Impacts of climate change and the resulting atmospheric warming are extensive, and know no political or geographic boundaries. These far-reaching effects will be manifested as environmental, economic, socioeconomic, and geopolitical issues. Offsetting the projected increase in fossil energy use with renewable energy production will require large increases in renewable energy systems, as well as the ability to store and transport clean domestic fuels. Storage and transport of electricity generated from intermittent resources such as wind and solar is central to the widespread use of renewable energy technologies. Hydrogen created from water electrolysis is an option for energy storage and transport, and represents a pollution-free source of fuel when generated using renewable electricity. The conversion of chemical to electrical energy using fuel cells provides a high efficiency, carbon-free power source. Hydrogen serves to blur the line between stationary and mobile power applications, as it can be used as both a transportation fuel and for stationary electricity generation, with the possibility of a distributed generation energy infrastructure. Hydrogen and fuel cell technologies will be presented as possible pollution-free solutions to present and future energy concerns. Recent hydrogen-related research at SLAC in hydrogen production, fuel cell catalysis, and hydrogen storage will be highlighted in this seminar.

Leisch, Jennifer

2007-02-27T23:59:59.000Z

272

Hydrogen and Sulfur Production from Hydrogen Sulfide Wastes  

E-Print Network [OSTI]

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...

Harkness, J.; Doctor, R. D.

273

Reactions of Methylene Hydrogen  

E-Print Network [OSTI]

was orystallized out as a yellow solid from aloohol and then from ethyl aostate. Melting point 170°C Analysis: Calculated for C17H14O2U s - 10.10$ Found I = 10.00$ SUMMARY 0 It was found that the methods given in the literature for the preparation... following* 1. Metallic sodium replaces either one, or both of the hydrogens, the latter being given off as a free gas. 2. Sodium hydroxide replaces the hydrogen by the metal, with a splitting off of water. 3. Sodium ethylate reacts, giving the metal 3...

Griffin, E. L.

1912-05-15T23:59:59.000Z

274

Thin film hydrogen sensor  

DOE Patents [OSTI]

A thin film hydrogen sensor includes a substantially flat ceramic substrate with first and second planar sides and a first substrate end opposite a second substrate end; a thin film temperature responsive resistor on the first planar side of the substrate proximate to the first substrate end; a thin film hydrogen responsive metal resistor on the first planar side of the substrate proximate to the fist substrate end and proximate to the temperature responsive resistor; and a heater on the second planar side of the substrate proximate to the first end. 5 figs.

Cheng, Y.T.; Poli, A.A.; Meltser, M.A.

1999-03-23T23:59:59.000Z

275

Thin film hydrogen sensor  

DOE Patents [OSTI]

A thin film hydrogen sensor, includes: a substantially flat ceramic substrate with first and second planar sides and a first substrate end opposite a second substrate end; a thin film temperature responsive resistor on the first planar side of the substrate proximate to the first substrate end; a thin film hydrogen responsive metal resistor on the first planar side of the substrate proximate to the fist substrate end and proximate to the temperature responsive resistor; and a heater on the second planar side of the substrate proximate to the first end.

Cheng, Yang-Tse (Rochester Hills, MI); Poli, Andrea A. (Livonia, MI); Meltser, Mark Alexander (Pittsford, NY)

1999-01-01T23:59:59.000Z

276

The JET Hydrogen-Oxygen Recombination Sensor – A Safety Device for Hydrogen Isotope Processing Systems  

E-Print Network [OSTI]

The JET Hydrogen-Oxygen Recombination Sensor – A Safety Device for Hydrogen Isotope Processing Systems

277

Hydrogen,Fuel Cells & Infrastructure  

E-Print Network [OSTI]

;The President's FY04 Budget Request for FreedomCAR and Hydrogen Fuel Initiatives 4.0Office of Nuclear commercialization decision by 2015. Fuel Cell Vehicles in the Showroom and Hydrogen at Fueling Stations by 2020 #12

278

Oxidation resistant organic hydrogen getters  

DOE Patents [OSTI]

A composition for removing hydrogen from an atmosphere, comprising a mixture of a polyphenyl ether and a hydrogenation catalyst, preferably a precious metal catalyst, and most preferably Pt. This composition is stable in the presence of oxygen, will not polymerize or degrade upon exposure to temperatures in excess of 200.degree. C., or prolonged exposure to temperatures in the range of 100-300.degree. C. Moreover, these novel hydrogen getter materials can be used to efficiently removing hydrogen from mixtures of hydrogen/inert gas (e.g., He, Ar, N.sub.2), hydrogen/ammonia atmospheres, such as may be encountered in heat exchangers, and hydrogen/carbon dioxide atmospheres. Water vapor and common atmospheric gases have no adverse effect on the ability of these getter materials to absorb hydrogen.

Shepodd, Timothy J. (Livermore, CA); Buffleben, George M. (Tracy, CA)

2008-09-09T23:59:59.000Z

279

Hydrogen Distribution and Delivery Infrastructure  

Fuel Cell Technologies Publication and Product Library (EERE)

This 2-page fact sheet provides a brief introduction to hydrogen delivery technologies. Intended for a non-technical audience, it explains how hydrogen is transported and delivered today, the challen

280

Hydrogen and Fuel Cell Activities  

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

U.S. * 50% of this resource could provide 340,000 kgday of hydrogen. Background: Biogas as an Early Source of Renewable Hydrogen * The majority of biogas resources are...

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

Hydrogen Delivery Infrastructure Options Analysis  

Fuel Cell Technologies Publication and Product Library (EERE)

This report, by the Nexant team, documents an in-depth analysis of seven hydrogen delivery options to identify the most cost-effective hydrogen infrastructure for the transition and long term. The pro

282

Muon capture in hydrogen  

E-Print Network [OSTI]

Theoretical difficulties in reconciling the measured rates for ordinary and radiative muon capture are discussed, based on heavy-baryon chiral perturbation theory. We also examine ambiguity in our analysis due to the formation of p$\\mu$p molecules in the liquid hydrogen target.

S. Ando; F. Myhrer; K. Kubodera

2001-10-30T23:59:59.000Z

283

Hydrogen isotope separation  

DOE Patents [OSTI]

A system of four cryogenic fractional distillation columns interlinked with two equilibrators for separating a DT and hydrogen feed stream into four product streams, consisting of a stream of high purity D.sub.2, DT, T.sub.2, and a tritium-free stream of HD for waste disposal.

Bartlit, John R. (Los Alamos, NM); Denton, William H. (Abingdon, GB3); Sherman, Robert H. (Los Alamos, NM)

1982-01-01T23:59:59.000Z

284

Resistive hydrogen sensing element  

DOE Patents [OSTI]

Systems and methods are described for providing a hydrogen sensing element with a more robust exposed metallization by application of a discontinuous or porous overlay to hold the metallization firmly on the substrate. An apparatus includes: a substantially inert, electrically-insulating substrate; a first Pd containing metallization deposited upon the substrate and completely covered by a substantially hydrogen-impermeable layer so as to form a reference resistor on the substrate; a second Pd containing metallization deposited upon the substrate and at least a partially accessible to a gas to be tested, so as to form a hydrogen-sensing resistor; a protective structure disposed upon at least a portion of the second Pd containing metallization and at least a portion of the substrate to improve the attachment of the second Pd containing metallization to the substrate while allowing the gas to contact said the second Pd containing metallization; and a resistance bridge circuit coupled to both the first and second Pd containing metallizations. The circuit determines the difference in electrical resistance between the first and second Pd containing metallizations. The hydrogen concentration in the gas may be determined. The systems and methods provide advantages because adhesion is improved without adversely effecting measurement speed or sensitivity.

Lauf, Robert J. (Oak Ridge, TN)

2000-01-01T23:59:59.000Z

285

Fossil-Based Hydrogen Production  

E-Print Network [OSTI]

) Fossil-Based Hydrogen Production Praxair Praxair SNL TIAX · Integrated Ceramic Membrane System for H2

286

Webinar: Hydrogen Storage Materials Requirements  

Broader source: Energy.gov [DOE]

Video recording and text version of the webinar titled, Hydrogen Storage Materials Requirements, originally presented on June 25, 2013.

287

Detroit Commuter Hydrogen Project  

SciTech Connect (OSTI)

This project was undertaken to demonstrate the viability of using hydrogen as a fuel in an internal combustion engine vehicle for use as a part of a mass transit system. The advantages of hydrogen as a fuel include renew-ability, minimal environmental impact on air quality and the environment, and potential to reduce dependence on foreign energy sources for the transportation sector. Recognizing the potential for the hydrogen fuel concept, the Southeast Michigan Congress of Governments (SEMCOG) determined to consider it in the study of a proposed regional mass transit rail system for southeast Michigan. SEMCOG wanted to evaluate the feasibility of using hydrogen fueled internal combustion engine (H2ICE) vehicles in shuttle buses to connect the Detroit Metro Airport to a proposed, nearby rail station. Shuttle buses are in current use on the airport for passenger parking and inter-terminal transport. This duty cycle is well suited to the application of hydrogen fuel at this time because of the ability to re-fuel vehicles at a single nearby facility, overcoming the challenge of restricted fuel availability in the undeveloped hydrogen fuel infrastructure. A cooperative agreement between SEMCOG and the DOE was initiated and two H2ICE buses were placed in regular passenger service on March 29, 2009 and operated for six months in regular passenger service. The buses were developed and built by the Ford Motor Company. Wayne County Airport Authority provided the location for the demonstration with the airport transportation contractor, Metro Cars Inc. operating the buses. The buses were built on Ford E450 chassis and incorporated a modified a 6.8L V-10 engine with specially designed supercharger, fuel rails and injectors among other sophisticated control systems. Up to 30 kg of on-board gaseous hydrogen were stored in a modular six tank, 350 bar (5000 psi) system to provide a 150 mile driving range. The bus chassis and body were configured to carry nine passengers with luggage. By collecting fuel use data for the two H2ICE buses, with both written driver logs and onboard telemetry devices, and for two conventional propane-gasoline powered buses in the same service, comparisons of operating efficiency and maintenance requirements were completed. Public opinion about the concept of hydrogen fuel was sampled with a rider survey throughout the demonstration. The demonstration was very effective in adding to the understanding of the application of hydrogen as a transportation fuel. The two 9 passenger H2ICE buses accumulated nearly 50,000 miles and carried 14,285 passengers. Data indicated the H2ICE bus fuel economy to be 9.4 miles/ gallon of gasoline equivalent (m/GGE) compared to the 10 passenger propane-gasoline bus average of 9.8 m/GGE over 32,400 miles. The 23- passenger bus averaged 7.4 m/GGE over 40,700 miles. Rider feedback from 1050 on-board survey cards was overwhelmingly positive with 99.6% indicating they would ride again on a hydrogen powered vehicle. Minimal maintenance was required for theses buses during the demonstration project, but a longer duration demonstration would be required to more adequately assess this aspect of the concept.

Brooks, Jerry; Prebo, Brendan

2010-07-31T23:59:59.000Z

288

California Hydrogen Infrastructure Project  

SciTech Connect (OSTI)

Air Products and Chemicals, Inc. has completed a comprehensive, multiyear project to demonstrate a hydrogen infrastructure in California. The specific primary objective of the project was to demonstrate a model of a ���¢��������real-world���¢������� retail hydrogen infrastructure and acquire sufficient data within the project to assess the feasibility of achieving the nation���¢��������s hydrogen infrastructure goals. The project helped to advance hydrogen station technology, including the vehicle-to-station fueling interface, through consumer experiences and feedback. By encompassing a variety of fuel cell vehicles, customer profiles and fueling experiences, this project was able to obtain a complete portrait of real market needs. The project also opened its stations to other qualified vehicle providers at the appropriate time to promote widespread use and gain even broader public understanding of a hydrogen infrastructure. The project engaged major energy companies to provide a fueling experience similar to traditional gasoline station sites to foster public acceptance of hydrogen. Work over the course of the project was focused in multiple areas. With respect to the equipment needed, technical design specifications (including both safety and operational considerations) were written, reviewed, and finalized. After finalizing individual equipment designs, complete station designs were started including process flow diagrams and systems safety reviews. Material quotes were obtained, and in some cases, depending on the project status and the lead time, equipment was placed on order and fabrication began. Consideration was given for expected vehicle usage and station capacity, standard features needed, and the ability to upgrade the station at a later date. In parallel with work on the equipment, discussions were started with various vehicle manufacturers to identify vehicle demand (short- and long-term needs). Discussions included identifying potential areas most suited for hydrogen fueling stations with a focus on safe, convenient, fast-fills. These potential areas were then compared to and overlaid with suitable sites from various energy companies and other potential station operators. Work continues to match vehicle needs with suitable fueling station locations. Once a specific site was identified, the necessary agreements could be completed with the station operator and expected station users. Detailed work could then begin on the site drawings, permits, safety procedures and training needs. Permanent stations were successfully installed in Irvine (delivered liquid hydrogen), Torrance (delivered pipeline hydrogen) and Fountain Valley (renewable hydrogen from anaerobic digester gas). Mobile fueling stations were also deployed to meet short-term fueling needs in Long Beach and Placerville. Once these stations were brought online, infrastructure data was collected and reported to DOE using Air Products���¢�������� Enterprise Remote Access Monitoring system. Feedback from station operators was incorporated to improve the station user���¢��������s fueling experience.

Edward C. Heydorn

2013-03-12T23:59:59.000Z

289

Hydrogen Piping Experience in Chevron  

E-Print Network [OSTI]

Hydrogen Piping Experience in Chevron Refining Ned Niccolls Materials Engineer Chevron Energy Technology Company Hydrogen Pipeline Working Group Workshop August 30-31, 2005 #12;Outline 2 Overall perspectives from long term use of hydrogen piping in refining. Piping specifications and practices. The (few

290

The Bumpy Road to Hydrogen  

E-Print Network [OSTI]

in combustion engines, or converted into hydrogen at fuelengines are now nearly zero-emitting. What do these lessons imply for hydrogen?Hydrogen will find it difficult to compete with the century-long investment in petroleum fuels and internal combustion engines.

Sperling, Dan; Ogden, Joan M

2006-01-01T23:59:59.000Z

291

Proceedings NATIONAL HYDROGEN VISION MEETING  

E-Print Network [OSTI]

's Plan directs us to explore the possibility of a hydrogen economy..." Spencer Abraham, Secretary be found at the end of this document.) The intent was to identify a common vision of a "hydrogen economy of the Group: Which factors are most likely to support/inhibit the development of a "hydrogen economy

292

January 2005 HYDROGEN EMBRITTLEMENT OF  

E-Print Network [OSTI]

1 January 2005 HYDROGEN EMBRITTLEMENT OF PIPELINE STEELS: CAUSES AND REMEDIATION P. Sofronis, I. Robertson, D. Johnson University of Illinois at Urbana-Champaign Hydrogen Pipeline R&D Project Review Meeting Oak Ridge National Laboratory, Oak Ridge TN January 5-6, 2005 #12;2 January 2005 Hydrogen

293

Composites Technology for Hydrogen Pipelines  

E-Print Network [OSTI]

Composites Technology for Hydrogen Pipelines Barton Smith, Barbara Frame, Larry Anovitz and Cliff;Composites Technology for Hydrogen Pipelines Fiber-reinforced polymer pipe Project Overview: Investigate of pipeline per day. · $190k/mile capital cost for distribution pipelines · Hydrogen delivery cost below $1

294

CODE OF PRACTICE HYDROGEN SULFIDE  

E-Print Network [OSTI]

CODE OF PRACTICE HYDROGEN SULFIDE 1 The following generic Code of Practice applies to all work areas within the University of Alberta that use hydrogen sulfide gas. It outlines responsibilities, safe procedure requirements. All work areas where hydrogen sulfide is used within the University of Alberta must

Machel, Hans

295

Hybrid & Hydrogen Vehicle Research Laboratory  

E-Print Network [OSTI]

such as Challenge X use this facility to develop advanced vehicles. Hydrogen Fueling Station Developed byAir Products and Chemicals, Inc. with funding from US DOE, the commercial hydrogen fueling station was installed at Penn State University Park in Fall 2004. This station will be used to fuel in-service hydrogen

Lee, Dongwon

296

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

297

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

298

Controlled Hydrogen Fleet and Infrastructure Demonstration and...  

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

Controlled Hydrogen Fleet and Infrastructure Demonstration and Validation Project Solicitation Controlled Hydrogen Fleet and Infrastructure Demonstration and Validation Project...

299

Combinatorial Approaches for Hydrogen Storage Materials (presentation...  

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

Approaches for Hydrogen Storage Materials (presentation) Combinatorial Approaches for Hydrogen Storage Materials (presentation) Presentation on NIST Combinatorial Methods at the...

300

International Hydrogen Infrastructure Challenges Workshop Summary...  

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

More Documents & Publications Introduction to SAE Hydrogen Fueling Standardization Light Duty Fuel Cell Electric Vehicle Hydrogen Fueling Protocol Fuel Cell...

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

Webinar: Hydrogen Storage Materials Database Demonstration |...  

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

Storage Materials Database Demonstration Webinar: Hydrogen Storage Materials Database Demonstration Presentation slides from the Fuel Cell Technologies Office webinar "Hydrogen...

302

Solar Thermochemical Hydrogen Production Research (STCH): Thermochemic...  

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

Solar Thermochemical Hydrogen Production Research (STCH): Thermochemical Cycle Selection and Investment Priority Solar Thermochemical Hydrogen Production Research (STCH):...

303

International Hydrogen Infrastructure Challenges Workshop Summary...  

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

International Hydrogen Infrastructure Challenges Workshop Summary - NOW, NEDO, and DOE International Hydrogen Infrastructure Challenges Workshop Summary - NOW, NEDO, and DOE...

304

Upcoming Webinar December 16: International Hydrogen Infrastructure...  

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

Upcoming Webinar December 16: International Hydrogen Infrastructure Challenges NOW, DOE, and NEDO Upcoming Webinar December 16: International Hydrogen Infrastructure Challenges...

305

A Photosynthetic Hydrogel for Catalytic Hydrogen Production ...  

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

A Photosynthetic Hydrogel for Catalytic Hydrogen Production Home > Research > ANSER Research Highlights > A Photosynthetic Hydrogel for Catalytic Hydrogen Production...

306

Technoeconomic Analysis of Photoelectrochemical (PEC) Hydrogen...  

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

Analysis of Photoelectrochemical (PEC) Hydrogen Production Technoeconomic Analysis of Photoelectrochemical (PEC) Hydrogen Production This report documents the engineering and cost...

307

Controlled Hydrogen Fleet and Infrastructure Demonstration and...  

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

3veenstra.pdf More Documents & Publications Technology Validation Controlled Hydrogen Fleet & Infrastructure Analysis HYDROGEN TO THE HIGHWAYS...

308

FUEL CELL TECHNOLOGIES PROGRAM Hydrogen and Fuel  

E-Print Network [OSTI]

FUEL CELL TECHNOLOGIES PROGRAM Hydrogen and Fuel Cell Technologies Program: Storage Hydrogen Storage Developing safe, reliable, compact, and cost-effective hydrogen storage tech- nologies is one be Stored? Hydrogen storage will be required onboard vehicles and at hydrogen production sites, hydrogen

309

Solid evacuated microspheres of hydrogen  

DOE Patents [OSTI]

A method is provided for producing solid, evacuated microspheres comprised of hydrogen. The spheres are produced by forming a jet of liquid hydrogen and exciting mechanical waves on the jet of appropriate frequency so that the jet breaks up into drops with a bubble formed in each drop by cavitation. The drops are exposed to a pressure less than the vapor pressure of the liquid hydrogen so that the bubble which is formed within each drop expands. The drops which contain bubbles are exposed to an environment having a pressure just below the triple point of liquid hydrogen and they thereby freeze giving solid, evacuated spheres of hydrogen.

Turnbull, Robert J. (Urbana, IL); Foster, Christopher A. (Champaign, IL); Hendricks, Charles D. (Livermore, CA)

1982-01-01T23:59:59.000Z

310

Advanced hydrogen utilization technology demonstration  

SciTech Connect (OSTI)

This report presents the results of a study done by Detroit Diesel Corporation (DDC). DDC used a 6V-92TA engine for experiments with hydrogen fuel. The engine was first baseline tested using methanol fuel and methanol unit injectors. One cylinder of the engine was converted to operate on hydrogen fuel, and methanol fueled the remaining five cylinders. This early testing with only one hydrogen-fueled cylinder was conducted to determine the operating parameters that would later be implemented for multicylinder hydrogen operation. Researchers then operated three cylinders of the engine on hydrogen fuel to verify single-cylinder idle tests. Once it was determined that the engine would operate well at idle, the engine was modified to operate with all six cylinders fueled with hydrogen. Six-cylinder operation on hydrogen provided an opportunity to verify previous test results and to more accurately determine the performance, thermal efficiency, and emissions of the engine.

Hedrick, J.C.; Winsor, R.E. [Detroit Diesel Corp., MI (United States)] [Detroit Diesel Corp., MI (United States)

1994-06-01T23:59:59.000Z

311

Hydrogen Economy: Opportunities and Challenges *  

E-Print Network [OSTI]

A hydrogen economy, the long-term goal of many nations, can potentially provide energy security, along with environmental and economic benefits. However, the transition from a conventional petroleum-based energy system to a hydrogen economy involves many uncertainties, such as the development of efficient fuel cell technologies, problems in hydrogen production and distribution infrastructure, and the response of petroleum markets. This study uses the U.S. MARKAL model to simulate the impacts of hydrogen technologies on the U.S. energy system and identify potential impediments to a successful transition. Preliminary findings identify potential market barriers facing the hydrogen economy, as well as opportunities in new R&D and product markets for bioproducts. Quantitative analysis also offers insights on policy options for promoting hydrogen technologies. The objective of this paper is to study the transition from a petroleum-based energy system to a hydrogen economy, and ascertain the consequent opportunities and

312

Polymer system for gettering hydrogen  

DOE Patents [OSTI]

A novel composition comprising organic polymer molecules having carbon-carbon double bonds, for removing hydrogen from the atmosphere within enclosed spaces. Organic polymers molecules containing carbon-carbon double bonds throughout their structures, preferably polybutadiene, polyisoprene and derivatives thereof, intimately mixed with an insoluble catalyst composition, comprising a hydrogenation catalyst and a catalyst support, preferably Pd supported on carbon, provide a hydrogen getter composition useful for removing hydrogen from enclosed spaces even in the presence of contaminants such as common atmospheric gases, water vapor, carbon dioxide, ammonia, oil mists, and water. The hydrogen getter composition disclosed herein is particularly useful for removing hydrogen from enclosed spaces containing potentially explosive mixtures of hydrogen and oxygen.

Shepodd, Timothy Jon (330 Thrasher Ave., Livermore, Alameda County, CA 94550); Whinnery, LeRoy L. (4929 Julie St., Livermore, Alameda County, CA 94550)

2000-01-01T23:59:59.000Z

313

Polymer formulations for gettering hydrogen  

DOE Patents [OSTI]

A novel composition comprising organic polymer molecules having carbon-carbon double bonds, for removing hydrogen from the atmosphere within enclosed spaces. Organic polymers molecules containing carbon-carbon double bonds throughout their structures, preferably polybutadiene, polyisoprene and derivatives thereof, intimately mixed with an insoluble catalyst composition, comprising a hydrogenation catalyst and a catalyst support, preferably Pd supported on carbon, provide a hydrogen getter composition useful for removing hydrogen from enclosed spaces even in the presence of contaminants such as common atmospheric gases, water vapor, carbon dioxide, ammonia, oil mists, and water. The hydrogen getter composition disclosed herein is particularly useful for removing hydrogen from enclosed spaces containing potentially explosive mixtures of hydrogen and oxygen.

Shepodd, Timothy Jon (Livermore, CA); Whinnery, LeRoy L. (Livermore, CA)

1998-11-17T23:59:59.000Z

314

Geothermal hydrogen sulfide removal  

SciTech Connect (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

315

Reversible hydrogen storage materials  

DOE Patents [OSTI]

In accordance with the present disclosure, a process for synthesis of a complex hydride material for hydrogen storage is provided. The process includes mixing a borohydride with at least one additive agent and at least one catalyst and heating the mixture at a temperature of less than about 600.degree. C. and a pressure of H.sub.2 gas to form a complex hydride material. The complex hydride material comprises MAl.sub.xB.sub.yH.sub.z, wherein M is an alkali metal or group IIA metal, Al is the element aluminum, x is any number from 0 to 1, B is the element boron, y is a number from 0 to 13, and z is a number from 4 to 57 with the additive agent and catalyst still being present. The complex hydride material is capable of cyclic dehydrogenation and rehydrogenation and has a hydrogen capacity of at least about 4 weight percent.

Ritter, James A. (Lexington, SC); Wang, Tao (Columbia, SC); Ebner, Armin D. (Lexington, SC); Holland, Charles E. (Cayce, SC)

2012-04-10T23:59:59.000Z

316

Hydrogen | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating Solar Power BasicsGermany: EnergyPowerInformationHomerHydrogen Companies Loading

317

Hydrogen | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating Solar Power BasicsGermany: EnergyPowerInformationHomerHydrogen Companies

318

Fluoride removal in the presence of organophosphates: application to chemical warfare agent destruction  

E-Print Network [OSTI]

generated. Of the many commercially available anion exchange resins, two were identified by their manufacturer as possible fluoride exchangers. Rohm & Haas' Amberlite IRA- 400(OH/Gl) and Dow Corporation's Dowex MWA-1 were examined for their ability... crystal 105-107 extremel soluble Table 63: Physical Properties of MPA, GAS? 993-13-5. *As determined by titration, appendix F. APPENDIX C REVIEW OF ION EXCHANGE Ion exchange is based on the principle of a fixed ionic group bound to a resin which...

Wenaas, Christopher Eric

1996-01-01T23:59:59.000Z

319

[sup 27]Al NMR, GT-IR and ethanol-[sup 18]O TPD characterization of fluorided alumina  

SciTech Connect (OSTI)

New environmental legislation in the United States requiring reformulation of gasoline and diesel fuels is making its necessary to develop better, alternative acid catalysts for alkylation and isomerization reactions, and for hydrotreating catalysts for sulfur and nitrogen removal from refinery streams. A series of F/Al[sub 2]O[sub 3] samples (wt % F = 0 to 20) has been studied using a combination of solid-state [sup 27]Al NMR, FT-IR, and ethanol-[sup 18]O TPD techniques. Solid-state [sup 27]Al NMR is particularly sensitive to amorphous phases or small crystallites present on the catalyst surface, many of which cannot be detected by XRD. [sup 27]Al NMR shows the presence of three types of AlF[sub 3](H[sub 2]O)[sub n] species (with n varying between 0 and 3) on fluorided alumina. FT-IR studies of ethanol adsorption show that fluoride blocks the sites required for dissociative chemisorption of ethanol. A similar analysis of adsorbed pyridine shows an increase in the number of Broensted acid sites with the addition of up to 10 wt % fluoride. However, increasing the fluoride loading to 20 wt % decreases the number of Broensted acid sites. The TPD of ethanol-[sup 18]O from F/Al[sub 2]O[sub 3] samples shows that at low levels fluoride serves to block Lewis acid sites, but at higher levels its predominant role is to increase the Broensted acidity of the alumina surface. The pyridine adsorption and TPD experiments show that fluoride strengthens the remaining Lewis acid sites. 14 figs., 3 tabs.

DeCanio, E.C. (Texaco R D Dept., Beacon, NY (United States) Wesleyan Univ., Middletown, CT (United States)); Bruno, J.W. (Wesleyan Univ., Middletown, CT (United States)); Nero, V.P.; Edwards, J.C. (Texaco R D Dept., Beacon, NY (United States))

1993-03-01T23:59:59.000Z

320

Surface acidity and cumene conversion. II. A study of. gamma. -alumina containing fluoride, cobalt, and molybdenum additives: the effect of reduction  

SciTech Connect (OSTI)

The effect of reduction of the cumene conversion activity of a series of fluoride-impregnated, alumina-supported cobalt-molybdenum catalysts has been investigated. Such catalysts exhibit two different types of Broensted acid sites, one associated with the molybdenum and the other with the fluorided alumina surface. Reduction with H/sub 2/ eliminates the former type of site, but does not affect the latter. Reduction does not affect the activity of the alumina catalyst which is impregnated only with fluoride, but conversions for the other catalysts are reduced by 2-10%. In hydrocracking experiments, the dramatic influence of fluoride impregnation on cumene conversion and the synergistic nature of the fluoride and cobalt/molybdenum are demonstrated.

Boorman, P.M.; Kydd, R.A.; Sarbak, Z.; Somogyvari, A.

1986-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

Hydrogen Fuel Pilot Plant and Hydrogen ICE Vehicle Testing  

SciTech Connect (OSTI)

The U.S. Department Energy's Advanced Vehicle Testing Activity (AVTA) teamed with Electric Transportation Applications (ETA) and Arizona Public Service (APS) to develop the APS Alternative Fuel (Hydrogen) Pilot Plant that produces and compresses hydrogen on site through an electrolysis process by operating a PEM fuel cell in reverse; natural gas is also compressed onsite. The Pilot Plant dispenses 100% hydrogen, 15 to 50% blends of hydrogen and compressed natural gas (H/CNG), and 100% CNG via a credit card billing system at pressures up to 5,000 psi. Thirty internal combustion engine (ICE) vehicles (including Daimler Chrysler, Ford and General Motors vehicles) are operating on 100% hydrogen and 15 to 50% H/CNG blends. Since the Pilot Plant started operating in June 2002, they hydrogen and H/CNG ICE vehicels have accumulated 250,000 test miles.

J. Francfort (INEEL)

2005-03-01T23:59:59.000Z

322

Hydrogen Energy Stations: Poly-Production of Electricity, Hydrogen, and Thermal Energy  

E-Print Network [OSTI]

compressor Compressed hydrogen storage Figure 2: High-compressor Compressed hydrogen storage Clean Energy Group lduction, and a hydrogen compression, storage, and Energy

Lipman, Timothy; Brooks, Cameron

2006-01-01T23:59:59.000Z

323

SunLine Test Drives Hydrogen Bus: Hydrogen Fuel Cell & Infrastructure...  

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

SunLine Test Drives Hydrogen Bus: Hydrogen Fuel Cell & Infrastructure Technologies Program, Fuel Cell Bus Demonstration Projects Fact Sheet. SunLine Test Drives Hydrogen Bus:...

324

Hydrogen Energy Stations: Poly-Production of Electricity, Hydrogen, and Thermal Energy  

E-Print Network [OSTI]

report on renewable hydrogen production. We hope that youis one method of hydrogen production at small and mediumis one method of hydrogen production at small and medium

Lipman, Timothy; Brooks, Cameron

2006-01-01T23:59:59.000Z

325

Hydrogen Strategies: an Integrated Resource Planning Analysis for the Development of Hydrogen Energy Infrastructures  

E-Print Network [OSTI]

concepts and knowledge in hydrogen energy systems and theirdevelop alternative hydrogen-energy scenarios. The scenariosof alternative hydrogen energy pathways to characterize an

Pigneri, Attilio

2005-01-01T23:59:59.000Z

326

Hydrogen Energy Stations: Poly-Production of Electricity, Hydrogen, and Thermal Energy  

E-Print Network [OSTI]

Other State Hydrogen and Fuel Cell Programs Regional Levelrelated to hydrogen and fuel cell tech- nologies. Otherapplications of hydrogen and fuel cell technologies. They

Lipman, Timothy; Brooks, Cameron

2006-01-01T23:59:59.000Z

327

High-pressure Storage Vessels for Hydrogen, Natural Gas andHydrogen...  

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

Gas and Blends - Materials Testing and Design Requirements for Hydrogen Components and Tanks International Hydrogen Fuel and Pressure Vessel Forum 2010 Proceedings Hydrogen...

328

Hydrogen Strategies: an Integrated Resource Planning Analysis for the Development of Hydrogen Energy Infrastructures  

E-Print Network [OSTI]

concepts and knowledge in hydrogen energy systems and theirInternational Hydrogen Energy Congress and Exhibition IHECthe Development of Hydrogen Energy Infrastructures Attilio

Pigneri, Attilio

2005-01-01T23:59:59.000Z

329

Hydrogen Energy Stations: Poly-Production of Electricity, Hydrogen, and Thermal Energy  

E-Print Network [OSTI]

Partnership Finalizes Hydrogen Energy Roadmap,” World WideCommercialization Strategy for Hydrogen Energy Technologies,Economic Analysis of Hydrogen Energy Station Concepts: Are “

Lipman, Timothy; Brooks, Cameron

2006-01-01T23:59:59.000Z

330

DOE Hydrogen and Fuel Cells Program Record 9017: On-Board Hydrogen...  

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

Hydrogen Storage Systems - Projected Performance and Cost Parameters DOE Hydrogen and Fuel Cells Program Record 9017: On-Board Hydrogen Storage Systems - Projected Performance...

331

Hydrogen Energy Stations: Poly-Production of Electricity, Hydrogen, and Thermal Energy  

E-Print Network [OSTI]

Electricity, Hydrogen, and Thermal Energy Timothy E. LipmanElectricity, Hydrogen, and Thermal Energy Timothy E. Lipmanof electricity, hydrogen, and thermal energy; 2) a survey of

Lipman, Timothy; Brooks, Cameron

2006-01-01T23:59:59.000Z

332

Bulk Hydrogen Storage - Strategic Directions for Hydrogen Delivery...  

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

Breakout Session - Bulk Hydrogen Storage RD&D Needs Top 6 Categories: Advanced Concepts Advanced Materials Codes & Standards Studies & Analyses Tools & Techniques Demonstration &...

333

Hydrogen-Bond Networks: Strengths of Different Types of Hydrogen...  

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

energetic driving force for enzyme catalysis and conformational changes such as in protein folding due to multiple hydrogen bonds in a HBN. Citation: Shokri A, Y Wang, GA...

334

Hydrogen ICE Vehicle Testing Activities  

SciTech Connect (OSTI)

The Advanced Vehicle Testing Activity teamed with Electric Transportation Applications and Arizona Public Service to develop and monitor the operations of the APS Alternative Fuel (Hydrogen) Pilot Plant. The Pilot Plant provides 100% hydrogen, and hydrogen and compressed natural gas (H/CNG)-blended fuels for the evaluation of hydrogen and H/CNG internal combustion engine (ICE) vehicles in controlled and fleet testing environments. Since June 2002, twenty hydrogen and H/CNG vehicles have accumulated 300,000 test miles and 5,700 fueling events. The AVTA is part of the Department of Energy’s FreedomCAR and Vehicle Technologies Program. These testing activities are managed by the Idaho National Laboratory. This paper discusses the Pilot Plant design and monitoring, and hydrogen ICE vehicle testing methods and results.

J. Francfort; D. Karner

2006-04-01T23:59:59.000Z

335

Quantum Confinement in Hydrogen Bond  

E-Print Network [OSTI]

In this work, the quantum confinement effect is proposed as the cause of the displacement of the vibrational spectrum of molecular groups that involve hydrogen bonds. In this approach the hydrogen bond imposes a space barrier to hydrogen and constrains its oscillatory motion. We studied the vibrational transitions through the Morse potential, for the NH and OH molecular groups inside macromolecules in situation of confinement (when hydrogen bonding is formed) and non-confinement (when there is no hydrogen bonding). The energies were obtained through the variational method with the trial wave functions obtained from Supersymmetric Quantum Mechanics (SQM) formalism. The results indicate that it is possible to distinguish the emission peaks related to the existence of the hydrogen bonds. These analytical results were satisfactorily compared with experimental results obtained from infrared spectroscopy.

Santos, Carlos da Silva dos; Ricotta, Regina Maria

2015-01-01T23:59:59.000Z

336

amide hydrogen exchange: Topics by E-print Network  

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

Economics of Hydrogen Technologies Renewable Energy Websites Summary: Internal Combustion Engine Transportation Applications Hydrogen Fuel Cell Vehicles Hydrogen Internal Power...

337

Nancy Garland DOE Hydrogen Program  

E-Print Network [OSTI]

commercialization decision by 2015 Fuel cell vehicles in showroom and hydrogen at fuel stations by 2020 #12;Hydrogen, and distributed combined heat and power applications. #12;DOE Hydrogen Program Budget $544DOT $37,301Earmarks (EE,830$30,000$29,432Storage R&D (EE) $14,363$25,325$22,564Production & Delivery R&D (EE) FY 05 Appropriations* ($000) FY 05

338

Aluminum hydroxide solubility in aqueous solutions containing fluoride ions at 50/sup 0/Cype  

SciTech Connect (OSTI)

Aluminum hydroxide solubility experiments were performed at 50/sup 0/C using the method of May et al. (1979b). The shift observed by May at 25/sup 0/C between acidic and alkaline solution was also observed in these experiments. Infrared spectra of solids separated from solutions show that the low solubility values observed in alkaline medium can be related to the formation of a new solid phase: bayerite (or nordstrandite) (pK*/sub S/sub 4// = 13.4 at 50/sup 0/C) in the presence of initial gibbsite. A second set of experiments was performed in solutions containing fluoride ions in the 10/sup -4/-10/sup -3/ M concentration range. Fluorocomplexes are important in acidic solution; Al(OH)/sub m/F/sub p/ mixed complexes can be important in the minimum of Al solubility when total fluoride exceeds 10/sup -3/ M. The authors propose values of thermodynamic data for Al(OH)/sub 2/F/sub 2//sup -/, Al(OH)F/sub 3//sup -/, Al(OH)/sub 2/F/sup 0/ and for aluminum trifluoride solid. The difference of aluminum hydroxide solubility between acidic and alkaline medium is still observed.

Sanjuan, B.; Michard, G.

1987-07-01T23:59:59.000Z

339

Self-fabricated single mode waveguide in fluoride glass excited by self-channeled plasma filaments  

SciTech Connect (OSTI)

Self-fabricated permanent structure of single mode waveguide in optical fluoride glasses was demonstrated using the self-channeled plasma filament excited by a femtosecond (130 fs) Ti:sapphire laser ({lambda}{sub p}=790 nm). The photoinduced refractive index modification in ZrF{sub 4}-BaF{sub 2}-LaF{sub 3}-AlF{sub 3}-NaF glasses reached a length of approximately 10-15 mm from the input surface of the optical glass with the diameters ranging from 5 to 8 {mu}m at the input intensities of more than 1.0x10{sup 12} W/cm{sup 2}. The graded refractive index profiles were fabricated to be a symmetric form from the center of optical fluoride glass, and a maximum value of refractive index change ({delta}n) was measured to be 1.3x10{sup -2}. The beam profile of the output beam transmitted through the modified region showed that the photoinduced refractive index modification produced a permanent structure of single mode waveguide.

Cho, Sung-Hak; Chang, Won-Seok; Kim, Jae-Goo; Whang, Kyoung-Hyun [Nano Machining Laboratory, Korea Institute of Machinery and Material (KIMM), 171 Jang-dong, Yuseong-Gu, Daejeon 305-343 (Korea, Republic of)

2007-09-17T23:59:59.000Z

340

Measurement of the Melting Point Temperature of Several Lithium-Sodium-Beryllium Fluoride Salt (Flinabe) Mixtures  

SciTech Connect (OSTI)

The molten salt Flibe, a combination of lithium and beryllium fluorides studied for molten salt fission reactors, has been proposed as a breeder and coolant for fusion applications. The melting points of 2LiF-BeF{sub 2} and LiF-BeF{sub 2} are 460 deg. C and 363 deg. C, but LiF-BeF{sub 2} is rather viscous and has less lithium for breeding. In the Advanced Power Extraction (APEX) Program, concepts with a free flowing liquid for the first wall and blanket were investigated. Flinabe (a mixture of LiF, BeF{sub 2} and NaF) was selected for a molten salt design because a melting temperature below 350 deg. C appeared possible and this provided an attractive operating temperature window for a reactor. To confirm that a ternary salt with a low melting temperature existed, several combinations of the fluoride salts, LiF, NaF and BeF{sub 2}, were melted in a stainless steel crucible under vacuum. One had an apparent melting temperature of 305 deg. C. The test system, preparation of the mixtures, melting procedures and temperature curves for the melting and cooling are presented along with the apparent melting points. Thermal modeling of the salt pool and crucible is reported in an accompanying paper.

McDonald, J.M; Nygren, R.E.; Lutz, T.J.; Tanaka, T.J; Ulrickson, M.A.; Boyle, T.J.; Troncosa, K.P. [Sandia National Laboratories (United States)

2005-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

Effect of Phosphate, Fluoride, and Nitrate on Gibbsite Dissolution Rate and Solubility  

SciTech Connect (OSTI)

Laboratory tests have been completed with simulated tank waste samples to investigate the effects of phosphate, fluoride, and nitrate on the dissolution rate and equilibrium solubility of gibbsite in sodium hydroxide solution at 22 and 40{degrees}C. Results are compared to relevant literature data and to computer model predictions. The presence of sodium nitrate (3 M) caused a reduction in the rate of gibbsite dissolution in NaOH, but a modest increase in the equilibrium solubility of aluminum. The increase in solubility was not as large, though, as the increase predicted by the computer model. The presence of phosphate, either as sodium phosphate or sodium fluoride phosphate, had a negligible effect on the rate of gibbsite dissolution, but caused a slight increase in aluminum solubility. The magnitude of the increased solubility, relative to the increase caused by sodium nitrate, suggests that the increase is due to ionic strength (or water activity) effects, rather than being associated with the specific ion involved. The computer model predicted that phosphate would cause a slight decrease in aluminum solubility, suggesting some Al-PO4 interaction. No evidence was found of such an interaction.

Herting, Daniel L. [Washington River Protection Solutions LLC (United States)

2014-01-29T23:59:59.000Z

342

Sandia National Laboratories: Hydrogen  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive SolarEducation Programs:CRFProvideAidsCanal,GridInfrastructureHydrogen Sandia

343

Sandia National Laboratories: Hydrogen  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -theErik Spoerke SSLS Exhibit at ExploraGlobalFacilityHeliostatHiroshiHydrogen

344

Hydrogen | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth's Heat Jump to:PhotonHolyName HousingIII WindHybridsCar CoHydrogen Jump to:

345

Experiment Hazard Class 11 - Hydrogen  

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

arrestors must be provided on all hydrogen supplies and must be located immediately downstream of the first regulator or other location determined by a safety review. Flammable...

346

Hydrogen Codes and Standards (Presentation)  

SciTech Connect (OSTI)

Presented at the 2006 DOE Hydrogen, Fuel Cells & Infrastructure Technologies Program Annual Merit Review in Washington, D.C., May 16-19, 2006.

Ohi, J.

2006-05-01T23:59:59.000Z

347

Alternative Transportation Technologies: Hydrogen, Biofuels,...  

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

Alternative Transportation Technologies: Hydrogen, Biofuels, Advanced Efficiency, and Plug-in Hybrid Electric Vehicles Results of two Reports from the National Research Council...

348

Hydrogen Technology Research at SRNL  

SciTech Connect (OSTI)

The Savannah River National Laboratory (SRNL) is a U.S. Department of Energy research and development laboratory located at the Savannah River Site (SRS) near Aiken, South Carolina. SRNL has over 50 years of experience in developing and applying hydrogen technology, both through its national defense activities as well as through its recent activities with the DOE Hydrogen Programs. The hydrogen technical staff at SRNL comprises over 90 scientists, engineers and technologists. SRNL has ongoing R&D initiatives in a variety of hydrogen storage areas, including metal hydrides, complex hydrides, chemical hydrides and carbon nanotubes. SRNL has over 25 years of experience in metal hydrides and solid-state hydrogen storage research, development and demonstration. As part of its defense mission at SRS, SRNL developed, designed, demonstrated and provides ongoing technical support for the largest hydrogen processing facility in the world based on the integrated use of metal hydrides for hydrogen storage, separation, and compression. The SRNL has been active in teaming with academic and industrial partners to advance hydrogen technology. A primary focus of SRNL's R&D has been hydrogen storage using metal and complex hydrides. SRNL and its Hydrogen Technology Research Laboratory have been very successful in leveraging their defense infrastructure, capabilities and investments to help solve this country's energy problems. SRNL has participated in projects to convert public transit and utility vehicles for operation using hydrogen fuel. Two major projects include the H2Fuel Bus and an Industrial Fuel Cell Vehicle (IFCV) also known as the GATOR{trademark}. Both of these projects were funded by DOE and cost shared by industry. These are discussed further in Section 3.0, Demonstration Projects. In addition to metal hydrides technology, the SRNL Hydrogen group has done extensive R&D in other hydrogen technologies, including membrane filters for H2 separation, doped carbon nanotubes, storage vessel design and optimization, chemical hydrides, hydrogen compressors and hydrogen production using nuclear energy. Several of these are discussed further in Section 2, SRNL Hydrogen Research and Development.

Danko, E.

2011-02-13T23:59:59.000Z

349

Catalyzed borohydrides for hydrogen storage  

DOE Patents [OSTI]

A hydrogen storage material and process is provided in which alkali borohydride materials are created which contain effective amounts of catalyst(s) which include transition metal oxides, halides, and chlorides of titanium, zirconium, tin, and combinations of the various catalysts. When the catalysts are added to an alkali borodydride such as a lithium borohydride, the initial hydrogen release point of the resulting mixture is substantially lowered. Additionally, the hydrogen storage material may be rehydrided with weight percent values of hydrogen at least about 9 percent.

Au, Ming (Augusta, GA)

2012-02-28T23:59:59.000Z

350

Technical and Economic Assessment of Regional Hydrogen Transition Strategies  

E-Print Network [OSTI]

system spatial layouts for hydrogen production and deliveryWe estimate costs for hydrogen production, delivery anda hydrogen depot (i.e. hydrogen production facility or city-

Ogden, Joan; Yang, Christopher; Nicholas, Michael

2007-01-01T23:59:59.000Z

351

The Hydrogen Laboratory and The Brazilian Reference Center for...  

Energy Savers [EERE]

The Hydrogen Laboratory and The Brazilian Reference Center for Hydrogen Energy The Hydrogen Laboratory and The Brazilian Reference Center for Hydrogen Energy Presentation given by...

352

Determining the lowest-cost hydrogen delivery mode  

E-Print Network [OSTI]

costs to estimate hydrogen pipeline costs. Davis, CA: ITS-hydrogen. The cost of hydrogen pipeline delivery de- pendshydrogen trucks, and hydrogen pipelines, were devel- oped

Yang, Christopher; Ogden, Joan M

2007-01-01T23:59:59.000Z

353

Determining the lowest-cost hydrogen delivery mode  

E-Print Network [OSTI]

costs to estimate hydrogen pipeline costs. Davis, CA: ITS-hydrogen trucks, and hydrogen pipelines, were devel- opedFor large amounts of hydrogen, pipeline transmission is pre-

Yang, Christopher; Ogden, Joan M

2007-01-01T23:59:59.000Z

354

Hydrogen, Fuel Cells, and Infrastructure Technologies FY 2003 Progress Report Photoelectrochemical Hydrogen Production  

E-Print Network [OSTI]

Hydrogen, Fuel Cells, and Infrastructure Technologies FY 2003 Progress Report 1 addresses the following technical barriers from the Hydrogen Production section of the Hydrogen, Fuel Cells Photoelectrodes ." #12;Hydrogen, Fuel Cells, and Infrastructure Technologies FY 2003 Progress Report 2

355

Photoinduced Hydrogen Abstraction from Phenols by Aromatic Ketones. A New Mechanism for Hydrogen Abstraction by  

E-Print Network [OSTI]

Photoinduced Hydrogen Abstraction from Phenols by Aromatic Ketones. A New Mechanism for Hydrogen carried out of the kinetics of inter- and intramolecular phenolic hydrogen abstraction phenolic hydrogen, which yields the corresponding phenoxyl-hemipinacol biradical. The biradicals have also

Leigh, William J.

356

2014 Hydrogen Student Design Contest to Design Drop-In Hydrogen...  

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

2014 Hydrogen Student Design Contest to Design Drop-In Hydrogen Fueling Station 2014 Hydrogen Student Design Contest to Design Drop-In Hydrogen Fueling Station December 16, 2013 -...

357

FUEL CELL TECHNOLOGIES PROGRAM Hydrogen Storage  

E-Print Network [OSTI]

FUEL CELL TECHNOLOGIES PROGRAM Hydrogen Storage Developing safe, reliable, compact, and cost of space. Where and How Will Hydrogen be Stored? Hydrogen storage will be required onboard vehicles to storing hydrogen include: · Physical storage of compressed hydrogen gas in high pressure tanks (up to 700

358

Analysis of Renewable Hydrogen Rangan Banerjee  

E-Print Network [OSTI]

Analysis of Renewable Hydrogen Rangan Banerjee Energy Systems Engineering IIT Bombay Lecture Dioxide Concentrations #12;Hydrogen Energy Can hydrogen energy mitigate the energy problem? Can hydrogen,COOKED FOOD etc.. #12;Source : Energy After Rio: UNDP Publication. #12;Hydrogen pathways Photo chemical Solar

Banerjee, Rangan

359

Hydrogen purifier module with membrane support  

DOE Patents [OSTI]

A hydrogen purifier utilizing a hydrogen-permeable membrane to purify hydrogen from mixed gases containing hydrogen is disclosed. Improved mechanical support for the permeable membrane is described, enabling forward or reverse differential pressurization of the membrane, which further stabilizes the membrane from wrinkling upon hydrogen uptake.

A hydrogen purifier utilizing a hydrogen-permeable membrane to purify hydrogen from mixed gases containing hydrogen is disclosed. Improved mechanical support for the permeable membrane is described, enabling forward or reverse differential pressurization of the membrane, which further stabilizes the membrane from wrinkling upon hydrogen uptake.

2012-07-24T23:59:59.000Z

360

Metal salt catalysts for enhancing hydrogen spillover  

DOE Patents [OSTI]

A composition for hydrogen storage includes a receptor, a hydrogen dissociating metal doped on the receptor, and a metal salt doped on the receptor. The hydrogen dissociating metal is configured to spill over hydrogen to the receptor, and the metal salt is configured to increase a rate of the spill over of the hydrogen to the receptor.

Yang, Ralph T; Wang, Yuhe

2013-04-23T23:59:59.000Z

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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 Production From Metal-Water Reactions  

E-Print Network [OSTI]

Hydrogen Production From Metal-Water Reactions Why Hydrogen Production? Hydrogen is a critical. Current methods of hydrogen storage in automobiles are either too bulky (large storage space for gas phase) or require a high input energy (cooling or pressurization systems for liquid hydrogen), making widespread use

Barthelat, Francois

362

Distributed Energy Fuel Cells DOE HydrogenDOE Hydrogen  

E-Print Network [OSTI]

Distributed Energy Fuel Cells DOE HydrogenDOE Hydrogen andand Fuel CellsFuel Cells Coordination Catalyst Development Water and Thermal Management Economic Analysis of PEM Fuel Cell Systems #12; Meeting Fuel Cell Coordination Meeting June 2-3, 2003 Electricity Users Kathi EppingKathi Epping #12

363

Advanced thermochemical hydrogen cycles  

SciTech Connect (OSTI)

The overall objective of this program is to contribute to the development of practical thermochemical cycles for the production of hydrogen from water. Specific goals are: investigate and evaluate the technical and economic viability of thermochemical cycles as an advanced technology for producing hydrogen from water; investigate and evaluate the engineering principles involved in interfacing individual thermochemical cycles with the different thermal energy sources (high temperature fission, solar, and fusion); and conduct a continuing research and development effort to evaluate the use of solid sulfates, oxides and other compounds as potentially advanced cycles and as alternates to H/sub 2/SO/sub 4/ based cycles. Basic thermochemistry studies have been completed for two different steps in the decomposition of bismuth sulfate. Two different bismuth sulfate cycles have been defined for different sulfuric acid strengths. The eventual best cycle will depend on energy required to form sulfuric acid at different concentrations. A solids decomposition facility has been constructed and practical studies of solid decompositions are being conducted. The facility includes a rotary kiln system and a dual-particle fluidized bed system. Evaluation of different types of cycles for coupling with different heat sources is continuing.

Hollabaugh, C.M.; Bowman, M.G.

1981-01-01T23:59:59.000Z

364

Advanced Hydrogen Turbine Development  

SciTech Connect (OSTI)

Siemens has developed a roadmap to achieve the DOE goals for efficiency, cost reduction, and emissions through innovative approaches and novel technologies which build upon worldwide IGCC operational experience, platform technology, and extensive experience in G-class operating conditions. In Phase 1, the technologies and concepts necessary to achieve the program goals were identified for the gas turbine components and supporting technology areas and testing plans were developed to mitigate identified risks. Multiple studies were conducted to evaluate the impact in plant performance of different gas turbine and plant technologies. 2015 gas turbine technologies showed a significant improvement in IGCC plant efficiency, however, a severe performance penalty was calculated for high carbon capture cases. Thermodynamic calculations showed that the DOE 2010 and 2015 efficiency targets can be met with a two step approach. A risk management process was instituted in Phase 1 to identify risk and develop mitigation plans. For the risks identified, testing and development programs are in place and the risks will be revisited periodically to determine if changes to the plan are necessary. A compressor performance prediction has shown that the design of the compressor for the engine can be achieved with additional stages added to the rear of the compressor. Tip clearance effects were studied as well as a range of flow and pressure ratios to evaluate the impacts to both performance and stability. Considerable data was obtained on the four candidate combustion systems: diffusion, catalytic, premix, and distributed combustion. Based on the results of Phase 1, the premixed combustion system and the distributed combustion system were chosen as having the most potential and will be the focus of Phase 2 of the program. Significant progress was also made in obtaining combustion kinetics data for high hydrogen fuels. The Phase 1 turbine studies indicate initial feasibility of the advanced hydrogen turbine that meets the aggressive targets set forth for the advanced hydrogen turbine, including increased rotor inlet temperature (RIT), lower total cooling and leakage air (TCLA) flow, higher pressure ratio, and higher mass flow through the turbine compared to the baseline. Maintaining efficiency with high mass flow Syngas combustion is achieved using a large high AN2 blade 4, which has been identified as a significant advancement beyond the current state-of-the-art. Preliminary results showed feasibility of a rotor system capable of increased power output and operating conditions above the baseline. In addition, several concepts were developed for casing components to address higher operating conditions. Rare earth modified bond coat for the purpose of reducing oxidation and TBC spallation demonstrated an increase in TBC spallation life of almost 40%. The results from Phase 1 identified two TBC compositions which satisfy the thermal conductivity requirements and have demonstrated phase stability up to temperatures of 1850 C. The potential to join alloys using a bonding process has been demonstrated and initial HVOF spray deposition trials were promising. The qualitative ranking of alloys and coatings in environmental conditions was also performed using isothermal tests where significant variations in alloy degradation were observed as a function of gas composition. Initial basic system configuration schematics and working system descriptions have been produced to define key boundary data and support estimation of costs. Review of existing materials in use for hydrogen transportation show benefits or tradeoffs for materials that could be used in this type of applications. Hydrogen safety will become a larger risk than when using natural gas fuel as the work done to date in other areas has shown direct implications for this type of use. Studies were conducted which showed reduced CO{sub 2} and NOx emissions with increased plant efficiency. An approach to maximize plant output is needed in order to address the DOE turbine goal for 20-30% reduction o

Joesph Fadok

2008-01-01T23:59:59.000Z

365

Electrochemical Hydrogen Compressor  

SciTech Connect (OSTI)

The Electrochemical Hydrogen Compressor EHC was evaluated against DOE applications for compressing hydrogen at automobile filling stations, in future hydrogen pipelines and as a commercial replacement for conventional diaphragm hydrogen compressors. It was also evaluated as a modular replacement for the compressors used in petrochemical refineries. If the EHC can be made inexpensive, reliable and long lived then it can satisfy all these applications save pipelines where the requirements for platinum catalyst exceeds the annual world production. The research performed did not completely investigate Molybdenum as a hydrogen anode or cathode, it did show that photoetched 316 stainless steel is inadequate for an EHC. It also showed that: molybdenum bipolar plates, photochemical etching processes, and Gortex Teflon seals are too costly for a commercial EHC. The use of carbon paper in combination with a perforated thin metal electrode demonstrated adequate anode support strength, but is suspect in promoting galvanic corrosion. The nature of the corrosion mechanisms are not well understood, but locally high potentials within the unit cell package are probably involved. The program produced a design with an extraordinary high cell pitch, and a very low part count. This is one of the promising aspects of the redesigned EHC. The development and successful demonstration of the hydraulic cathode is also important. The problem of corrosion resistant metal bipolar plates is vital to the development of an inexpensive, commercial PEM fuel cell. Our research suggests that there is more to the corrosion process in fuel cells and electrochemical compressors than simple, steady state, galvanic stability. It is an important area for scientific investigation. The experiments and analysis conducted lead to several recommended future research directions. First, we need a better understanding of the corrosion mechanisms involved. The diagnosis of experimental cells with titration to determine the loss of membrane active sites is recommended. We suspect that the corrosion includes more than simple galvanic mechanisms. The mechanisms involved in this phenomenon are poorly understood. Shunt currents at hydraulic cathode ports were problematic, but are not difficult to cure. In addition to corrosion there is evidence of high component resistivity. This may be due to the deposition of organic compounds, which may be produced electrochemically on the surface of the metal support screens that contact carbon gas diffusion layers (GDLs) or catalyst supports. An investigation of possible electro-organic sythesis mechanisms with emphasis on oxalates formation is warranted. The contaminated cell parts can be placed in an oxidizing atmosphere at high temperature and the weight loss can be observed. This would reveal the existence of organic compounds. Investigation into the effects of conductivity enhancers such as carbon microlayers on supporting carbon paper is also needed. Corrosion solutions should be investigated such as surface passivation of 316 SS parts using nitric acid. Ultra thin silane/siloxane polymer coatings should be tried. These may be especially useful in conjunction with metal felt replacement of carbon paper. A simple cure for the very high, localized corrosion of the anode might be to diffusion bond the metal electrode support screen to bipolar plate. This will insure uniform resistance perpendicular to the plane of the cell and eliminate some of the dependence of the resistance on high stack compression. Alternative materials should be explored. Alternatives to carbon in the cell may be helpful in any context. In particular, alternatives to carbon paper GDLs such as metal felts and alternatives to carbon supports for Pt such as TiC and TiB2 might also be worthwhile and would be helpful to fuel cells as well. Some alternative to the metals we used in the cell, Mo and 316 SS, are potentially useful. These include Al/Mg/Si alloys. Corrosion resistant materials such as Nb and Mo might prove useful as cladding materials that can be hot stamp

David P. Bloomfield; Brian S. MacKenzie

2006-05-01T23:59:59.000Z

366

Hydrogen and OUr Energy Future  

SciTech Connect (OSTI)

In 2003, President George W. Bush announced the Hydrogen Fuel Initiative to accelerate the research and development of hydrogen, fuel cell, and infrastructure technologies that would enable hydrogen fuel cell vehicles to reach the commercial market in the 2020 timeframe. The widespread use of hydrogen can reduce our dependence on imported oil and benefit the environment by reducing greenhouse gas emissions and criteria pollutant emissions that affect our air quality. The Energy Policy Act of 2005, passed by Congress and signed into law by President Bush on August 8, 2005, reinforces Federal government support for hydrogen and fuel cell technologies. Title VIII, also called the 'Spark M. Matsunaga Hydrogen Act of 2005' authorizes more than $3.2 billion for hydrogen and fuel cell activities intended to enable the commercial introduction of hydrogen fuel cell vehicles by 2020, consistent with the Hydrogen Fuel Initiative. Numerous other titles in the Act call for related tax and market incentives, new studies, collaboration with alternative fuels and renewable energy programs, and broadened demonstrations--clearly demonstrating the strong support among members of Congress for the development and use of hydrogen fuel cell technologies. In 2006, the President announced the Advanced Energy Initiative (AEI) to accelerate research on technologies with the potential to reduce near-term oil use in the transportation sector--batteries for hybrid vehicles and cellulosic ethanol--and advance activities under the Hydrogen Fuel Initiative. The AEI also supports research to reduce the cost of electricity production technologies in the stationary sector such as clean coal, nuclear energy, solar photovoltaics, and wind energy.

Rick Tidball; Stu Knoke

2009-03-01T23:59:59.000Z

367

A Minimum Free Energy Reaction Path for the E2 Reaction between Fluoro Ethane and a Fluoride Ion  

E-Print Network [OSTI]

A Minimum Free Energy Reaction Path for the E2 Reaction between Fluoro Ethane and a Fluoride Ion, such as the mechanism and the free-energy profile, remains an important challenge not only for enzyme catalysis1 of the reaction free-energy profile is very cumbersome with constrained molecular dynamics (MD) and umbrella

Nielsen, Steven O.

368

Luminescence and electrical properties of solution-processed ZnO thin films by adding fluorides and annealing atmosphere  

SciTech Connect (OSTI)

Highlights: {yields} Systematic study of the fluorides doped solution-processed ZnO thin films via the luminescence and electrical behaviors. {yields} Defect-related visible emission bands are affected by annealing ambient and fluoride addition. {yields} Adding lithium fluoride followed by annealing in oxygen ambient leads to a controlled defect density with proper TFT performance. -- Abstract: To develop an efficient channel layer for thin film transistors (TFTs), understanding the defect-related luminescence and electrical property is crucial for solution-processed ZnO thin films. Film growth with the fluorides addition, especially using LiF, followed by the oxygen ambient post-annealing leads to decreased defect-related emission as well as enhanced switching property. The saturation mobility and current on/off ratio are 0.31 cm{sup 2} V{sup -1} s{sup -1} and 1.04 x 10{sup 3}. Consequently, we can visualize an optimized process condition and characterization method for solution-processed TFT based on the fluorine-doped ZnO film channel layer by considering the overall emission behavior.

Choi, Sungho, E-mail: shochoi@krict.re.kr [Advanced Materials Division, Korea Research Institute of Chemical Technology, Yuseong, Daejeon 305-600 (Korea, Republic of)] [Advanced Materials Division, Korea Research Institute of Chemical Technology, Yuseong, Daejeon 305-600 (Korea, Republic of); Park, Byung-Yoon [Chemical and Electronic Materials Division, LG Electronics, Hyangjeong-dong, Heungdeok-gu, Cheongju (Korea, Republic of)] [Chemical and Electronic Materials Division, LG Electronics, Hyangjeong-dong, Heungdeok-gu, Cheongju (Korea, Republic of); Jung, Ha-Kyun [Advanced Materials Division, Korea Research Institute of Chemical Technology, Yuseong, Daejeon 305-600 (Korea, Republic of)] [Advanced Materials Division, Korea Research Institute of Chemical Technology, Yuseong, Daejeon 305-600 (Korea, Republic of)

2011-06-15T23:59:59.000Z

369

An experimental study of the aqueous solubility and speciation of Y(III) fluoride at temperatures up to 250 C  

E-Print Network [OSTI]

are known to be of hydrothermal origin or modified by hydrothermal processes (e.g., Oreskes and Einaudi information on the behavior of the REE in hydrothermal processes is essential for a better understanding fluoride-rich hydrothermal systems. Our results emphasize the usefulness of the Y/Ho ratio as a geochemical

Devernal, Anne

370

Energy transfer kinetics in oxy-fluoride glass and glass-ceramics doped with rare-earth ions  

SciTech Connect (OSTI)

An investigation of donor-acceptor energy transfer kinetics in dual rare earths doped precursor oxy-fluoride glass and its glass-ceramics containing NaYF{sub 4} nano-crystals is reported here, using three different donor-acceptor ion combinations such as Nd-Yb, Yb-Dy, and Nd-Dy. The precipitation of NaYF{sub 4} nano-crystals in host glass matrix under controlled post heat treatment of precursor oxy-fluoride glasses has been confirmed from XRD, FESEM, and transmission electron microscope (TEM) analysis. Further, the incorporation of dopant ions inside fluoride nano-crystals has been established through optical absorption and TEM-EDX analysis. The noticed decreasing trend in donor to acceptor energy transfer efficiency from precursor glass to glass-ceramics in all three combinations have been explained based on the structural rearrangements that occurred during the heat treatment process. The reduced coupling phonon energy for the dopant ions due to fluoride environment and its influence on the overall phonon assisted contribution in energy transfer process has been illustrated. Additionally, realization of a correlated distribution of dopant ions causing clustering inside nano-crystals has also been reported.

Sontakke, Atul D.; Annapurna, K. [Glass Science and Technology Section, CSIR-Central Glass and Ceramic Research Institute, 196, Raja S. C. Mullick Road, Kolkata - 700 032 (India)

2012-07-01T23:59:59.000Z

371

Hydrogen, Fuel Cells & Infrastructure Technologies ProgramHydrogen, Fuel Cells & Infrastructure Technologies Program Program Overview  

E-Print Network [OSTI]

For The Hydrogen Economy President Bush "Hydrogen fuel cells represent one of the most encouraging, innovative for the Hydrogen Economy Hydrogen is America's clean energy choice. Hydrogen is flexible, affordable, safe Calls for "International Partnership for the Hydrogen Economy" April 28, 2003 Secretary of Energy

372

Appendix G: Radiation HYDROGEN ATOM  

E-Print Network [OSTI]

. People are exposed to naturally occurring radiation constantly. For example, cosmic radiation; radon effects on the environment and biological systems. Radiation comes from natural and human-made sourcesAppendix G: Radiation #12;#12;P P P E E E N NN HYDROGEN ATOM DEUTERIUM ATOM TRITIUM ATOM HYDROGEN

Pennycook, Steve

373

Appendix A: Radiation HYDROGEN ATOM  

E-Print Network [OSTI]

. People are exposed to naturally occurring radiation constantly. For example, cosmic radiation; radon effects on the environment and biological systems. Radiation comes from natural and human-made sourcesAppendix A: Radiation #12;P P P E E E N NN HYDROGEN ATOM DEUTERIUM ATOM TRITIUM ATOM HYDROGEN

Pennycook, Steve

374

CATALYTICALLY ENCHANCED SYSTEMS FOR HYDROGEN STORAGE  

E-Print Network [OSTI]

hydrogenation reaction. However, development of a hydrogen storage system based on this technology seems. The dehydrogenation of cycloalkanes to arenes releases approximately 7 weight percent hydrogen. Such a storage system

375

Technical Assessment: Cryo-Compressed Hydrogen Storage  

E-Print Network [OSTI]

Technical Assessment: Cryo-Compressed Hydrogen Storage for Vehicular Applications October 30, 2006 .....................................................................................................................................................................8 APPENDIX A: Review of Cryo-Compressed Hydrogen Storage Systems ......................................................................................18 APPENDIX C: Presentation to the FreedomCAR & Fuel Hydrogen Storage Technical Team

376

Hydrogen Refueling Station Costs in Shanghai  

E-Print Network [OSTI]

pieces of hardware: 1. Hydrogen production equipment (e.g.existing industrial hydrogen production capacity might alsotons/yr of existing hydrogen production and 3,600 tons/yr of

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

2006-01-01T23:59:59.000Z

377

Solar-Hydrogen Fuel-Cell Vehicles  

E-Print Network [OSTI]

M. A. (1992). Hydrogen Fuel-Cell Vehicles. Re- koebensteinthan both. Solar-hydrogen and fuel-cell vehicles wouldberegulation. Solar-Hydrogen Fuel-Cell Vehicles MarkA. DeLuchi

DeLuchi, Mark A.; Ogden, Joan M.

1993-01-01T23:59:59.000Z

378

Hydrogen Refueling Station Costs in Shanghai  

E-Print Network [OSTI]

Well-to-wheels analysis of hydrogen based fuel-cell vehicleJP, et al. Distributed Hydrogen Fueling Systems Analysis,”Year 2006 UCD—ITS—RR—06—04 Hydrogen Refueling Station Costs

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

2006-01-01T23:59:59.000Z

379

Hydrogen refueling station costs in Shanghai  

E-Print Network [OSTI]

storing and transporting hydrogen. Golden, CO: NREL; 1998. [V. Survey of the economics of hydrogen technologies. Golden,liquid or gaseous form. Hydrogen can be produced from a va-

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

2007-01-01T23:59:59.000Z

380

Hydrogen in Type Ic Supernovae?  

E-Print Network [OSTI]

By definition, a Type Ic supernova (SN Ic) does not have conspicuous lines of hydrogen or helium in its optical spectrum. SNe Ic usually are modelled in terms of the gravitational collapse of bare carbon-oxygen cores. We consider the possibility that the spectra of ordinary (SN 1994I-like) SNe Ic have been misinterpreted, and that SNe Ic eject hydrogen. An absorption feature usually attributed to a blend of Si II 6355 and C II 6580 may be produced by H-alpha. If SN 1994I-like SNe Ic eject hydrogen, the possibility that hypernova (SN 1998bw-like) SNe Ic, some of which are associated with gamma-ray bursts, also eject hydrogen should be considered. The implications of hydrogen for SN Ic progenitors and explosion models are briefly discussed.

David Branch; David J. Jeffery; Timothy R. Young; E. Baron

2006-05-09T23:59:59.000Z

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

Reorientation of the ‘free OH’ group in the top-most layer of air/water interface of sodium fluoride aqueous solution probed with sum-frequency generation vibrational spectroscopy  

SciTech Connect (OSTI)

Many experimental and theoretical studies have established the specific anion, as well as cation effects on the hydrogen-bond structures at the air/water interface of electrolyte solutions. However, the ion effects on the top-most layer of the air/water interface, which is signified by the non-hydrogen-bonded so-called ‘free O-H’ group, has not been discussed or studied. In this report, we present the measurement of changes of the orientational angle of the ‘free O-H’ group at the air/water interface of the sodium fluoride (NaF) solutions at different concentrations using the interface selective sum-frequency generation vibrational spectroscopy (SFG-VS) in the ssp and ppp polarizations. The polarization dependent SFG-VS results show that the average tilt angle of the ‘free O-H’ changes from about 35.3 degrees ± 0.5 degrees to 43.4 degrees ± 2.1degrees as the NaF concentration increase from 0 to 0.94M (nearly saturated). Such tilt angle change is around the axis of the other O-H group of the same water molecule at the top-most layer at the air/water interface that is hydrogen-bonded to the water molecules below the top-most layer. These results provide quantitative molecular details of the ion effects of the NaF salt on the structure of the water molecules at the top-most layer of the air/water interfacial, even though both the Na+ cation and the F- anion are believed to be among the most excluded ions from the air/water interface.

Feng, Ran-Ran; Guo, Yuan; Wang, Hongfei

2014-09-17T23:59:59.000Z

382

Hydrogen, Fuel Cells and Infrastructure Technologies Program...  

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

Hydrogen, Fuel Cells and Infrastructure Technologies Program FY2003 Merit Review and Peer Evaluation Report Hydrogen, Fuel Cells and Infrastructure Technologies Program FY2003...

383

Survey of the Economics of Hydrogen Technologies  

E-Print Network [OSTI]

Gasification Biomass Pyrolysis Electrolysis Hydrogen Storage Compressed Gas Liquefied Gas Metal Hydride Carbon Hydrogen Production Steam Methane Reforming Noncatalytic Partial Oxidation Coal Gasification Biomass

384

Transportation and Stationary Power Integration with Hydrogen...  

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

with Hydrogen and Fuel Cell Technology in Connecticut Transportation and Stationary Power Integration with Hydrogen and Fuel Cell Technology in Connecticut Overview of strengths,...

385

DOE Hydrogen Program Overview | Department of Energy  

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

DOE Hydrogen Program Overview DOE Hydrogen Program Overview A prospectus for biological H2 production for the DOE Annual Program Review Meeting. photobiological.pdf More Documents...

386

2013 Biological Hydrogen Production Workshop Summary Report ...  

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

2013 Biological Hydrogen Production Workshop Summary Report 2013 Biological Hydrogen Production Workshop Summary Report November 2013 summary report for the 2013 Biological...

387

An Integrated Hydrogen Vision for California  

E-Print Network [OSTI]

$4. Wind electrolysis-derived hydrogen would cost about $7-Electrolysis 24,000 kg/day NAS/NRC, 2004 Note: Delivered hydrogen costs

2004-01-01T23:59:59.000Z

388

Hydrogen Storage Materials Database Demonstration Webinar (Text...  

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

Database Demonstration Webinar (Text Version) Hydrogen Storage Materials Database Demonstration Webinar (Text Version) Below is the text version of the webinar titled "Hydrogen...

389

Hydrogen Delivery Infrastructure Analysis, Options and Trade...  

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

Analysis, Options and Trade-offs, Transition and Long-term Hydrogen Delivery Infrastructure Analysis, Options and Trade-offs, Transition and Long-term Presentation on Hydrogen...

390

Distributed Hydrogen Production from Natural Gas: Independent...  

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

Distributed Hydrogen Production from Natural Gas: Independent Review Panel Report Distributed Hydrogen Production from Natural Gas: Independent Review Panel Report Independent...

391

Natural Gas and Hydrogen Infrastructure Opportunities: Markets...  

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

Natural Gas and Hydrogen Infrastructure Opportunities: Markets and Barriers to Growth Natural Gas and Hydrogen Infrastructure Opportunities: Markets and Barriers to Growth...

392

2013 Biological Hydrogen Production Workshop Summary Report  

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

for Hydrogen Production: In vitro biohybrid systems and enzyme engineering for solar hydrogen Non-Light Driven Biological Breakout Groups - Day 2 Fermentative...

393

Hydrogen for Energy Storage Analysis Overview (Presentation)  

SciTech Connect (OSTI)

Overview of hydrogen for energy storage analysis presented at the National Hydrogen Association Conference & Expo, May 3-6, 2010, Long Beach, CA.

Steward, D. M.; Ramsden, T.; Harrison, K.

2010-06-01T23:59:59.000Z

394

Final Report - Hydrogen Delivery Infrastructure Options Analysis...  

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

- Hydrogen Delivery Infrastructure Options Analysis Final Report - Hydrogen Delivery Infrastructure Options Analysis This report, by the Nexant team, documents an in-depth analysis...

395

Final Report - Hydrogen Delivery Infrastructure Options Analysis  

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

pipelines for gaseous hydrogen delivery Option 2: Use of existing natural gas or oil pipelines for gaseous hydrogen delivery Option 3: Use of existing natural gas pipelines...

396

Geographically Based Hydrogen Demand and Infrastructure Analysis...  

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

Analysis Geographically Based Hydrogen Demand and Infrastructure Analysis Presentation by NREL's Margo Melendez at the 2010 - 2025 Scenario Analysis for Hydrogen Fuel Cell Vehicles...

397

Hydrogen and Fuel Cells | Department of Energy  

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

Transportation Hydrogen and Fuel Cells Hydrogen and Fuel Cells EERE leads U.S. researchers and other partners in making transportation cleaner and more efficient through...

398

Hydrogen, Fuel Cells and Infrastructure Technologies Program...  

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

Hydrogen, Fuel Cells and Infrastructure Technologies Program: 2002 Annual Progress Report Hydrogen, Fuel Cells and Infrastructure Technologies Program: 2002 Annual Progress Report...

399

Hydrogen Infrastructure Market Readiness: Opportunities and Potential...  

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

Technologies Program GGE H2I HSCC Gasoline gallon equivalent Hawaii Hydrogen Initiative Hydrogen Station Cost Calculator ICE Internal combustion engine LDV Light-duty vehicle LS...

400

Hydrogen Embrittlement Fundamentals, Modeling, and Experiment...  

Energy Savers [EERE]

Hydrogen Embrittlement Fundamentals, Modeling, and Experiment Hydrogen Embrittlement Fundamentals, Modeling, and Experiment Embrittlement, under static load could be a result of...

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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 Vehicle and Infrastructure Demonstration and Validation...  

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

Vehicle and Infrastructure Demonstration and Validation Hydrogen Vehicle and Infrastructure Demonstration and Validation 2009 DOE Hydrogen Program and Vehicle Technologies Program...

402

State Experience in Hydrogen Infrastructure in California  

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

Experience in Hydrogen Infrastructure in California Gerhard H Achtelik Jr. February 17, 2011 Hydrogen Infrastructure Market Readiness Workshop California Environmental Protection...

403

Hydrogen Education Curriculum Path at Michigan Technological...  

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

Curriculum Path at Michigan Technological University Hydrogen Education Curriculum Path at Michigan Technological University 2009 DOE Hydrogen Program and Vehicle Technologies...

404

An Introduction to SAE Hydrogen Fueling Standardization  

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

SAE H2 Fueling Standardization 5 SAE HYDROGEN FUELING STANDARDIZATION Jesse Schneider (BMW) SAE J2601 & J2799 Sponsor SAE INTERNATIONAL *Hydrogen Fueling Background *SAE H2...

405

Hydrogen Production - Current Technology | Department of Energy  

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

Current Technology Hydrogen Production - Current Technology The development of clean, sustainable, and cost-competitive hydrogen production processes is key to a viable future...

406

Controlled Hydrogen Fleet and Infrastructure Analysis (Presentation)  

SciTech Connect (OSTI)

This presentation by Keith Wipke at the 2007 DOE Hydrogen Program Annual Merit Review Meeting provides information about NREL's Controlled Hydrogen Fleet and Infrastructure Analysis Project.

Wipke, K.

2007-05-17T23:59:59.000Z

407

Controlled crystallization and properties of zirconium fluoride-based glass-ceramics  

SciTech Connect (OSTI)

51ZrF{sub 4}{center_dot}16BaF{sub 2}{center_dot}5LaF{sub 3}{center_dot}20LiF{center_dot}5PbF{sub 2} glasses were prepared with CdF{sub 2} additions of 0, 2, 5, and 7.5 mol%. The glasses with 2 and 5 mol% exhibited controllable nucleation upon heat treatment above the glass transformation temperature. The nucleation and crystallization of glasses with 5 mol% CdF{sub 2} were characterized using bulk heat treatments, differential scanning calorimetry, and scanning electron microscopy. The isothermal crystallization of nucleated glasses resulted in the formation of a glass-ceramic that was transparent in the infrared (>70% transmission) and more resistant to fracture than typical fluoride glasses.

Jewell, J.M.; Friebele, E.J.; Aggarwal, I.D. [Naval Research Lab., Washington, DC (United States). Optical Sciences Div.

1996-09-01T23:59:59.000Z

408

Structural study of VO {sub x} doped aluminium fluoride and aluminium oxide catalysts  

SciTech Connect (OSTI)

The structural properties of vanadium doped aluminium oxyfluorides and aluminium oxides, prepared by a modified sol-gel synthesis route, were thoroughly investigated. The influence of the preparation technique and the calcination temperature on the coordination of vanadium, aluminium and fluorine was analysed by different spectroscopic methods such as Raman, MAS NMR and ESR spectroscopy. In all samples calcined at low temperatures (350 deg. C), vanadium coexists in two oxidation states V{sup IV} and V{sup V}, with V{sup IV} as dominating species in the vanadium doped aluminium oxyfluorides. In the fluoride containing solids aluminium as well as vanadium are coordinated by fluorine and oxygen. Thermal annealing of 800 deg. C leads to an extensive reorganisation of the original matrices and to the oxidation of V{sup IV} to V{sup V} in both systems. - Graphical abstract: Structure model for VO {sub x} doped aluminium oxide.

Scheurell, Kerstin [Institute of Chemistry, Humboldt University of Berlin, Brook-Taylor-Street 2, Berlin D-12489 (Germany); Scholz, Gudrun [Institute of Chemistry, Humboldt University of Berlin, Brook-Taylor-Street 2, Berlin D-12489 (Germany); Kemnitz, Erhard [Institute of Chemistry, Humboldt University of Berlin, Brook-Taylor-Street 2, Berlin D-12489 (Germany)], E-mail: erhard.kemnitz@chemie.hu-berlin.de

2007-02-15T23:59:59.000Z

409

Fluoride Salt-Cooled High-Temperature Reactor Technology Development and Demonstration Roadmap  

SciTech Connect (OSTI)

Fluoride salt-cooled High-temperature Reactors (FHRs) are an emerging reactor class with potentially advantageous performance characteristics, and fully passive safety. This roadmap describes the principal remaining FHR technology challenges and the development path needed to address the challenges. This roadmap also provides an integrated overview of the current status of the broad set of technologies necessary to design, evaluate, license, construct, operate, and maintain FHRs. First-generation FHRs will not require any technology breakthroughs, but do require significant concept development, system integration, and technology maturation. FHRs are currently entering early phase engineering development. As such, this roadmap is not as technically detailed or specific as would be the case for a more mature reactor class. The higher cost of fuel and coolant, the lack of an approved licensing framework, the lack of qualified, salt-compatible structural materials, and the potential for tritium release into the environment are the most obvious issues that remain to be resolved.

Holcomb, David Eugene [ORNL; Flanagan, George F [ORNL; Mays, Gary T [ORNL; Pointer, William David [ORNL; Robb, Kevin R [ORNL; Yoder Jr, Graydon L [ORNL

2013-11-01T23:59:59.000Z

410

Rare earth/iron fluoride and methods for making and using same  

DOE Patents [OSTI]

A particulate mixture of Fe.sub.2 O.sub.3 and RE.sub.2 O.sub.3, where RE is a rare earth element, is reacted with an excess of HF acid to form an insoluble fluoride compound (salt) comprising REF.sub.3 and FeF.sub.3 present in solid solution in the REF.sub.3 crystal lattice. The REF.sub.3 /FeF.sub.3 compound is dried to render it usable as a reactant in the thermite reduction process as well as other processes which require an REF.sub.3 /FeF.sub.3 mixture. The dried REF.sub.3 /FeF.sub.3 compound comprises about 5 weight % to about 40 weight % of FeF.sub.3 and the balance REF.sub.3 to this end.

Schmidt, Frederick A. (Ames, IA); Wheelock, John T. (Neveda, IA); Peterson, David T. (Ames, IA)

1991-12-17T23:59:59.000Z

411

Barium fluoride whispering-gallery-mode disk-resonator with one billion quality-factor  

E-Print Network [OSTI]

We demonstrate a monolithic optical whispering gallery mode resonator fabricated with barium fluoride (BaF$_2$) with an ultra-high quality ($Q$) factor above $10^9$ at $1550$ nm, and measured with both the linewidth and cavity-ring-down methods. Vertical scanning optical profilometry shows that the root mean square surface roughness of $2$ nm is achieved for our mm-size disk. To the best of our knowledge, we show for the first time that one billion $Q$-factor is achievable by precision polishing in relatively soft crystals with mohs hardness of ~$3$. We show that complex thermo-optical dynamics can take place in these resonators. Beside usual applications in nonlinear optics and microwave photonics, high energy particle scintillation detection utilizing monolithic BaF$_2$ resonators potentially becomes feasible.

Lin, Guoping; Henriet, Rémi; Jacquot, Maxime; Chembo, Yanne K

2015-01-01T23:59:59.000Z

412

Stabilization of Th{sup 3+} ions into mixed-valence thorium fluoride  

SciTech Connect (OSTI)

The unusual oxidation state +3 of the thorium has been stabilized into a lithium containing non-stoichiometric mixed-valence (III/IV) thorium fluorinated phase with formula Li{sub 2+x}Th{sub 12}F{sub 50} (0fluoride. The electrochemical insertion of Li{sup +} ions into the open channels of the host matrix has been carried out at 60 {sup o}C, using an alkylcarbonate PC-LiClO{sub 4} 1 M electrolyte. The Li{sup +} and Th{sup 3+} contents, both in the starting composition and the Li{sup +} inserted ones, were investigated by high resolution solid state {sup 7}Li NMR and EPR, respectively. -- Graphical abstract: Electrochemical insertion of Li{sup +} ions into mixed-valence III/IV thorium fluoride and EPR spectra for the raw and inserted compounds. Display Omitted

Dubois, Marc, E-mail: marc.dubois@univ-bpclermont.f [Clermont Universite, Universite Blaise Pascal, Laboratoire des Materiaux Inorganiques, BP 10448, F-63000 Clermont-Ferrand (France); CNRS, UMR 6002, LMI, F-63177 Aubiere (France); Dieudonne, Belto; Mesbah, Adel; Bonnet, Pierre; El-Ghozzi, Malika [Clermont Universite, Universite Blaise Pascal, Laboratoire des Materiaux Inorganiques, BP 10448, F-63000 Clermont-Ferrand (France); CNRS, UMR 6002, LMI, F-63177 Aubiere (France); Renaudin, Guillaume [Clermont Universite, ENSCCF, Laboratoire des Materiaux Inorganiques, BP 10448, F-63000 Clermont-Ferrand (France); CNRS, UMR 6002, LMI, F-63177 Aubiere (France); Avignant, Daniel [Clermont Universite, Universite Blaise Pascal, Laboratoire des Materiaux Inorganiques, BP 10448, F-63000 Clermont-Ferrand (France); CNRS, UMR 6002, LMI, F-63177 Aubiere (France)

2011-01-15T23:59:59.000Z

413

Technical Analysis of Hydrogen Production  

SciTech Connect (OSTI)

The aim of this work was to assess issues of cost, and performance associated with the production and storage of hydrogen via following three feedstocks: sub-quality natural gas (SQNG), ammonia (NH{sub 3}), and water. Three technology areas were considered: (1) Hydrogen production utilizing SQNG resources, (2) Hydrogen storage in ammonia and amine-borane complexes for fuel cell applications, and (3) Hydrogen from solar thermochemical cycles for splitting water. This report summarizes our findings with the following objectives: Technoeconomic analysis of the feasibility of the technology areas 1-3; Evaluation of the hydrogen production cost by technology areas 1; and Feasibility of ammonia and/or amine-borane complexes (technology areas 2) as a means of hydrogen storage on-board fuel cell powered vehicles. For each technology area, we reviewed the open literature with respect to the following criteria: process efficiency, cost, safety, and ease of implementation and impact of the latest materials innovations, if any. We employed various process analysis platforms including FactSage chemical equilibrium software and Aspen Technologies AspenPlus and HYSYS chemical process simulation programs for determining the performance of the prospective hydrogen production processes.

Ali T-Raissi

2005-01-14T23:59:59.000Z

414

Hydrogen-storing hydride complexes  

DOE Patents [OSTI]

A ternary hydrogen storage system having a constant stoichiometric molar ratio of LiNH.sub.2:MgH.sub.2:LiBH.sub.4 of 2:1:1. It was found that the incorporation of MgH.sub.2 particles of approximately 10 nm to 20 nm exhibit a lower initial hydrogen release temperature of 150.degree. C. Furthermore, it is observed that the particle size of LiBNH quaternary hydride has a significant effect on the hydrogen sorption concentration with an optimum size of 28 nm. The as-synthesized hydrides exhibit two main hydrogen release temperatures, one around 160.degree. C. and the other around 300.degree. C., with the main hydrogen release temperature reduced from 310.degree. C. to 270.degree. C., while hydrogen is first reversibly released at temperatures as low as 150.degree. C. with a total hydrogen capacity of 6 wt. % to 8 wt. %. Detailed thermal, capacity, structural and microstructural properties have been demonstrated and correlated with the activation energies of these materials.

Srinivasan, Sesha S. (Tampa, FL); Niemann, Michael U. (Venice, FL); Goswami, D. Yogi (Tampa, FL); Stefanakos, Elias K. (Tampa, FL)

2012-04-10T23:59:59.000Z

415

Towards A Hydrogen Economy, 3. edition  

SciTech Connect (OSTI)

The report provides a study of the movement towards using hydrogen as a key energy carrier in the future and takes a high-level look at the current state of hydrogen and addresses the infrastructure requirements needed to make the hydrogen economy a reality. The report offers a detailed look at the move to a hydrogen economy by: identifying the current status of hydrogen production and use; discussing the key business drivers of the move towards hydrogen; discussing the barriers to implementation that stand in the way of a transition; providing a critical look at whether the hydrogen economy can succeed; describing the options that exist for a hydrogen infrastructure; identifying the key government initiatives making the hydrogen economy a reality; providing company-by-company profiles of automobile manufacturer efforts to develop and commercialize hydrogen vehicles; and, providing profiles of key hydrogen infrastructure manufacturers.

NONE

2007-05-15T23:59:59.000Z

416

PHOTOCATALYTIC AND PHOTOELECTROCHEMICAL HYDROGEN PRODUCTION ON STRONTIUM TITANATE SINGLE CRYSTALS  

E-Print Network [OSTI]

HYDROGEN PRODUCTION ON STRONTIUM TITANATE SINGLE CRYSTALS F.HYDROGEN PRODUCTION ON STRONTIUM TITANATE SINGLE CRYSTALS

Wagner, F.T.

2012-01-01T23:59:59.000Z

417

Hydrogen Production: Fundamentals and Case Study Summaries (Presentation)  

SciTech Connect (OSTI)

This presentation summarizes hydrogen production fundamentals and case studies, including hydrogen to wind case studies.

Harrison, K.; Remick, R.; Hoskin, A.; Martin, G.

2010-05-19T23:59:59.000Z

418

Solar hydrogen for urban trucks  

SciTech Connect (OSTI)

The Clean Air Now (CAN) Solar Hydrogen Project, located at Xerox Corp., El Segundo, California, includes solar photovoltaic powered hydrogen generation, compression, storage and end use. Three modified Ford Ranger trucks use the hydrogen fuel. The stand-alone electrolyzer and hydrogen dispensing system are solely powered by a photovoltaic array. A variable frequency DC-AC converter steps up the voltage to drive the 15 horsepower compressor motor. On site storage is available for up to 14,000 standard cubic feet (SCF) of solar hydrogen, and up to 80,000 SCF of commercial hydrogen. The project is 3 miles from Los Angeles International airport. The engine conversions are bored to 2.9 liter displacement and are supercharged. Performance is similar to that of the Ranger gasoline powered truck. Fuel is stored in carbon composite tanks (just behind the driver`s cab) at pressures up to 3600 psi. Truck range is 144 miles, given 3600 psi of hydrogen. The engine operates in lean burn mode, with nil CO and HC emissions. NO{sub x} emissions vary with load and rpm in the range from 10 to 100 ppm, yielding total emissions at a small fraction of the ULEV standard. Two trucks have been converted for the Xerox fleet, and one for the City of West Hollywood. A public outreach program, done in conjunction with the local public schools and the Department of Energy, introduces the local public to the advantages of hydrogen fuel technologies. The Clean Air Now program demonstrates that hydrogen powered fleet development is an appropriate, safe, and effective strategy for improvement of urban air quality, energy security and avoidance of global warming impact. Continued technology development and cost reduction promises to make such implementation market competitive.

Provenzano, J.: Scott, P.B.; Zweig, R. [Clean Air Now, Northridge, CA (United States)

1997-12-31T23:59:59.000Z

419

Hydrogen Hydrogen FusionFusionFusionFusionFusionFusion  

E-Print Network [OSTI]

100.000 years LNGS Laboratori Nazionali del Gran Sasso Borexino THE THERMONUCLEAR FUSION REACTIONHydrogen Hydrogen Fusion Deuterium FusionFusionFusionFusionFusionFusion THE SUN AS BOREXINO SEES

Heiz, Ulrich

420

Insight into hydrogenation of graphene: Effect of hydrogen plasma chemistry  

SciTech Connect (OSTI)

Plasma hydrogenation of graphene has been proposed as a tool to modify the properties of graphene. However, hydrogen plasma is a complex system and controlled hydrogenation of graphene suffers from a lack of understanding of the plasma chemistry. Here, we correlate the modifications induced on monolayer graphene studied by Raman spectroscopy with the hydrogen ions energy distributions obtained by mass spectrometry. We measure the energy distribution of H{sup +}, H{sub 2}{sup +}, and H{sub 3}{sup +} ions for different plasma conditions showing that their energy strongly depends on the sample position, pressure, and plasma power and can reach values as high as 45?eV. Based on these measurements, we speculate that under specific plasma parameters, protons should possess enough energy to penetrate the graphene sheet. Therefore, a graphene membrane could become, under certain conditions, transparent to both protons and electrons.

Felten, A.; Nittler, L.; Pireaux, J.-J. [Research Center in Physics of Matter and Radiation (PMR), University of Namur, Namur (Belgium); McManus, D. [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); Rice, C.; Casiraghi, C. [School of Chemistry and Photon Science Institute, University of Manchester, Manchester (United Kingdom)

2014-11-03T23:59:59.000Z

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

Hydrogen Generation From Electrolysis  

SciTech Connect (OSTI)

Small-scale (100-500 kg H2/day) electrolysis is an important step in increasing the use of hydrogen as fuel. Until there is a large population of hydrogen fueled vehicles, the smaller production systems will be the most cost-effective. Performing conceptual designs and analyses in this size range enables identification of issues and/or opportunities for improvement in approach on the path to 1500 kg H2/day and larger systems. The objectives of this program are to establish the possible pathways to cost effective larger Proton Exchange Membrane (PEM) water electrolysis systems and to identify areas where future research and development efforts have the opportunity for the greatest impact in terms of capital cost reduction and efficiency improvements. System design and analysis was conducted to determine the overall electrolysis system component architecture and develop a life cycle cost estimate. A design trade study identified subsystem components and configurations based on the trade-offs between system efficiency, cost and lifetime. Laboratory testing of components was conducted to optimize performance and decrease cost, and this data was used as input to modeling of system performance and cost. PEM electrolysis has historically been burdened by high capital costs and lower efficiency than required for large-scale hydrogen production. This was known going into the program and solutions to these issues were the focus of the work. The program provided insights to significant cost reduction and efficiency improvement opportunities for PEM electrolysis. The work performed revealed many improvement ideas that when utilized together can make significant progress towards the technical and cost targets of the DOE program. The cell stack capital cost requires reduction to approximately 25% of today’s technology. The pathway to achieve this is through part count reduction, use of thinner membranes, and catalyst loading reduction. Large-scale power supplies are available today that perform in a range of efficiencies, >95%, that are suitable for the overall operational goals. The balance of plant scales well both operationally and in terms of cost becoming a smaller portion of the overall cost equation as the systems get larger. Capital cost reduction of the cell stack power supplies is achievable by modifying the system configuration to have the cell stacks in electrical series driving up the DC bus voltage, thereby allowing the use of large-scale DC power supply technologies. The single power supply approach reduces cost. Elements of the cell stack cost reduction and efficiency improvement work performed in the early stage of the program is being continued in subsequent DOE sponsored programs and through internal investment by Proton. The results of the trade study of the 100 kg H2/day system have established a conceptual platform for design and development of a next generation electrolyzer for Proton. The advancements started by this program have the possibility of being realized in systems for the developing fueling markets in 2010 period.

Steven Cohen; Stephen Porter; Oscar Chow; David Henderson

2009-03-06T23:59:59.000Z

422

Assessment of the Use of Nitrogen Trifluoride for Purifying Coolant and Heat Transfer Salts in the Fluoride Salt-Cooled High-Temperature Reactor  

SciTech Connect (OSTI)

This report provides an assessment of the use of nitrogen trifluoride for removing oxide and water-caused contaminants in the fluoride salts that will be used as coolants in a molten salt cooled reactor.

Scheele, Randall D.; Casella, Andrew M.

2010-09-28T23:59:59.000Z

423

Beyond Conventional Cathode Materials for Li-ion Batteries and Na-ion Batteries Nickel fluoride conversion materials and P2 type Na-ion intercalation cathodes /  

E-Print Network [OSTI]

active material for Li-ion battery, Fe2OF4. ElectrochemistryIron Fluoride, in a Li Ion Battery: A Solid-State NMR, X-raymaterials for Li-ion battery……………………………133 8.2. P2 type

Lee, Dae Hoe

2013-01-01T23:59:59.000Z

424

Fiber optic hydrogen sensor  

DOE Patents [OSTI]

An apparatus and method for detecting a chemical substance by exposing an optic fiber having a core and a cladding to the chemical substance so that the chemical substance can be adsorbed onto the surface of the cladding. The optic fiber is coiled inside a container having a pair of valves for controlling the entrance and exit of the substance. Light from a light source is received by one end of the optic fiber, preferably external to the container, and carried by the core of the fiber. Adsorbed substance changes the transmissivity of the fiber as measured by a spectrophotometer at the other end, also preferably external to the container. Hydrogen is detected by the absorption of infrared light carried by an optic fiber with a silica cladding. Since the adsorption is reversible, a sensor according to the present invention can be used repeatedly. Multiple positions in a process system can be monitored using a single container that can be connected to each location to be monitored so that a sample can be obtained for measurement, or, alternatively, containers can be placed near each position and the optic fibers carrying the partially-absorbed light can be multiplexed for rapid sequential reading by a single spectrophotometer.

Buchanan, Bruce R. (1985 Willis, Batesburg, SC 29006); Prather, William S. (2419 Dickey Rd., Augusta, GA 30906)

1992-01-01T23:59:59.000Z

425

Fiber optic hydrogen sensor  

DOE Patents [OSTI]

Apparatus and method for detecting a chemical substance by exposing an optic fiber having a core and a cladding to the chemical substance so that the chemical substance can be adsorbed onto the surface of the cladding. The optic fiber is coiled inside a container having a pair of valves for controlling the entrance and exit of the substance. Light from a light source is received by one end of the optic fiber, preferably external to the container, and carried by the core of the fiber. Adsorbed substance changes the transmissivity of the fiber as measured by a spectrophotometer at the other end, also preferably external to the container. Hydrogen is detected by the absorption of infrared light carried by an optic fiber with a silica cladding. Since the adsorption is reversible, a sensor according to the present invention can be used repeatedly. Multiple positions in a process system can be monitored using a single container that can be connected to each location to be monitored so that a sample can be obtained for measurement, or, alternatively, containers can be placed near each position and the optic fibers carrying the partially-absorbed light can be multiplexed for rapid sequential reading, by a single spectrophotometer.

Buchanan, B.R.; Prather, W.S.

1991-01-01T23:59:59.000Z

426

Turbulence in Atomic Hydrogen  

E-Print Network [OSTI]

Understanding the properties of interstellar turbulence is a great intellectual challenge and the urge to solve this problem is partially motivated by a necessity to explain the star formation mystery. This review deals with a recently suggested inversion technique as applied to atomic hydrogen. This technique allows to determine 3D turbulence statistics through the variations of 21 cm intensity. We claim that a radio interferometer is an ideal tool for such a study as its visibility function is directly related to the statistics of galactic HI. Next, we show how galactic rotation curve can be used to study the turbulence slice by slice and relate the statistics given in galactic coordinates and in the velocity space. The application of the technique to HI data reveals a shallow spectrum of the underlying HI density that is not compatible with a naive Kolmogorov picture. We show that the random density corresponding to the found spectrum tends to form low contrast filaments that are elongated towards the observer.

A. Lazarian

1998-04-02T23:59:59.000Z

427

Fiber optic hydrogen sensor  

DOE Patents [OSTI]

An apparatus and method are described for detecting a chemical substance by exposing an optic fiber having a core and a cladding to the chemical substance so that the chemical substance can be adsorbed onto the surface of the cladding. The optic fiber is coiled inside a container having a pair of valves for controlling the entrance and exit of the substance. Light from a light source is received by one end of the optic fiber, preferably external to the container, and carried by the core of the fiber. Adsorbed substance changes the transmissivity of the fiber as measured by a spectrophotometer at the other end, also preferably external to the container. Hydrogen is detected by the absorption of infrared light carried by an optic fiber with a silica cladding. Since the adsorption is reversible, a sensor according to the present invention can be used repeatedly. Multiple positions in a process system can be monitored using a single container that can be connected to each location to be monitored so that a sample can be obtained for measurement, or, alternatively, containers can be placed near each position and the optic fibers carrying the partially-absorbed light can be multiplexed for rapid sequential reading by a single spectrophotometer. 4 figs.

Buchanan, B.R.; Prather, W.S.

1992-10-06T23:59:59.000Z

428

Production of hydrogen from alcohols  

DOE Patents [OSTI]

A process for producing hydrogen from ethanol or other alcohols. The alcohol, optionally in combination with water, is contacted with a catalyst comprising rhodium. The overall process is preferably carried out under autothermal conditions.

Deluga, Gregg A. (St. Paul, MN); Schmidt, Lanny D. (Minneapolis, MN)

2007-08-14T23:59:59.000Z

429

Hydrogen Technology Education Workshop Proceedings  

Fuel Cell Technologies Publication and Product Library (EERE)

This document outlines activities for educating key target audiences, as suggested by workshop participants. Held December 4-5, 2002, the Hydrogen Technology Education Workshop kicked off a new educat

430

National Hydrogen Vision Meeting Proceedings  

Fuel Cell Technologies Publication and Product Library (EERE)

This document provides presentations and summaries of the notes from the National Hydrogen Vision Meeting''s facilitated breakout sessions. The Vision Meeting, which took place November 15-16, 2001, k

431

Complex Hydrides for Hydrogen Storage  

SciTech Connect (OSTI)

This report describes research into the use of complex hydrides for hydrogen storage. The synthesis of a number of alanates, (AIH4) compounds, was investigated. Both wet chemical and mechano-chemical methods were studied.

Slattery, Darlene; Hampton, Michael

2003-03-10T23:59:59.000Z

432

The Bumpy Road to Hydrogen  

E-Print Network [OSTI]

consumer product—if fuel cell costs become competitive andthe hydrogen debate. Fuel cell costs are on a steep downwards state-of-the-art fuel cell stack would cost about $125 per

Sperling, Dan; Ogden, Joan M

2006-01-01T23:59:59.000Z

433

Modeling hydrogen fuel distribution infrastructure  

E-Print Network [OSTI]

This thesis' fundamental research question is to evaluate the structure of the hydrogen production, distribution, and dispensing infrastructure under various scenarios and to discover if any trends become apparent after ...

Pulido, Jon R. (Jon Ramon), 1974-

2004-01-01T23:59:59.000Z

434

Hydrogen Storage Workshop Argonne National Laboratory  

E-Print Network [OSTI]

hydrogen, fuel cells, and distribution..." #12;1. Hydrogen Storage 2. Hydrogen Production 3. Fuel Cell Cost barriers Assist Suppliers Independent T&E Advanced Concepts Analysis & Modeling SUPPLIERS PEM fuel cell, Stationary Fuel Cells 5,440 5,500 7,500 2,000 (+36%) HYDROGEN RESEARCH Core Research and Development 14

435

Controlled Hydrogen Fleet and Infrastructure Analysis (Presentation)  

SciTech Connect (OSTI)

This presentation summarizes controlled hydrogen fleet & infrastructure analysis undertaken for the DOE Fuel Cell Technologies Program.

Wipke, K.; Sprik, S.; Kurtz, J.; Ramsden, T.

2010-06-10T23:59:59.000Z

436

Ligand iron catalysts for selective hydrogenation  

DOE Patents [OSTI]

Disclosed are iron ligand catalysts for selective hydrogenation of aldehydes, ketones and imines. A catalyst such as dicarbonyl iron hydride hydroxycyclopentadiene) complex uses the OH on the five member ring and hydrogen linked to the iron to facilitate hydrogenation reactions, particularly in the presence of hydrogen gas.

Casey, Charles P. (Madison, WI); Guan, Hairong (Cincinnati, OH)

2010-11-16T23:59:59.000Z

437

Encapsulated Metal Hydride for Hydrogen Separation  

E-Print Network [OSTI]

concentration feed stock, not for low concentration ­ Hydrogen economy will need hydrogen recovery from lowEncapsulated Metal Hydride for Hydrogen Separation (Formerly Separation Membrane Development) DOE Hydrogen Program 2003 Merit Review and Peer Evaluation L. Kit Heung, Jim Congdon Savannah River Technology

438

DOE Hydrogen Pipeline Working Group Workshop  

E-Print Network [OSTI]

DOE Hydrogen Pipeline Working Group Workshop August 31, 2005 Augusta, Georgia #12;Hydrogen Pipeline Experience Presented By: LeRoy H. Remp Lead Project Manager Pipeline Projects #12;ppt00 3 Hydrogen Pipeline Pipeline Photos #12;ppt00 8 Pipeline Photos #12;ppt00 9 Overview of North American Air Products Hydrogen P

439

Composition for absorbing hydrogen from gas mixtures  

DOE Patents [OSTI]

A hydrogen storage composition is provided which defines a physical sol-gel matrix having an average pore size of less than 3.5 angstroms which effectively excludes gaseous metal hydride poisons while permitting hydrogen gas to enter. The composition is useful for separating hydrogen gas from diverse gas streams which may have contaminants that would otherwise render the hydrogen absorbing material inactive.

Heung, Leung K. (Aiken, SC); Wicks, George G. (Aiken, SC); Lee, Myung W. (Aiken, SC)

1999-01-01T23:59:59.000Z

440

Hydrogen Delivery Technology Roadmap, November 2005  

Fuel Cell Technologies Publication and Product Library (EERE)

Document describing plan for research into and development of hydrogen delivery technology for transportation applications.

Note: This page contains sample records for the topic "anhydrous hydrogen fluoride" 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

Hydrogen Storage Technologies Roadmap, November 2005  

Fuel Cell Technologies Publication and Product Library (EERE)

Document describing plan for research into and development of hydrogen storage technology for transportation applications.

442

Selective purge for hydrogenation reactor recycle loop  

SciTech Connect (OSTI)

Processes and apparatus for providing improved contaminant removal and hydrogen recovery in hydrogenation reactors, particularly in refineries and petrochemical plants. The improved contaminant removal is achieved by selective purging, by passing gases in the hydrogenation reactor recycle loop or purge stream across membranes selective in favor of the contaminant over hydrogen.

Baker, Richard W. (Palo Alto, CA); Lokhandwala, Kaaeid A. (Union City, CA)

2001-01-01T23:59:59.000Z

443

New energy, new hazards ? The hydrogen scenario  

E-Print Network [OSTI]

"energy carrier" ? Hydrogen based economy and associated energy converters fuel cell systems are said engines using hydrogen or hydrogen based mixtures, fuel cell systems), electrical plants, systems://www.eere.energy.gov ineris-00972421,version1-3Apr2014 #12;2.2 What is a fuel cell ? Fuel cells are the core of the hydrogen

Paris-Sud XI, Université de

444

Chemical Hydrogen Storage Center Center of Excellence  

E-Print Network [OSTI]

alternatives and assess economics and life cycle analysis of borohydride/water to hydrogen · Millennium CellChemical Hydrogen Storage Center Center of Excellence for Chemical Hydrogen Storage William Tumas proprietary or confidential information #12;2 Chemical Hydrogen Storage Center Overview Project Start Date: FY

Carver, Jeffrey C.

445

Apparatus and process for separating hydrogen isotopes  

DOE Patents [OSTI]

The apparatus and process for separating hydrogen isotopes is provided using dual columns, each column having an opposite hydrogen isotopic effect such that when a hydrogen isotope mixture feedstock is cycled between the two respective columns, two different hydrogen isotopes are separated from the feedstock.

Heung, Leung K; Sessions, Henry T; Xiao, Xin

2013-06-25T23:59:59.000Z

446

DEPARTMENT OF ENERGY HYDROGEN PROGRAM  

E-Print Network [OSTI]

1 DEPARTMENT OF ENERGY HYDROGEN PROGRAM MANUFACTURING R&D PRE-SOLICITATION MEETING FRIDAY, MAY 18 Devlin, Manager, Manufacturing R&D And Market Transformation, U.S. DOE Hydrogen Program 1:50 p.m. Break 20 21 22 23 3 P R O C E E D I N G S [Time Noted 1:30 p.m.] [Slide shown.] MR. DEVLIN: Okay. I've got

447

Effects of fluoride emissions from a modern primary aluminum smelter on a local population of white-tailed deer (Odocoileus virginianus)  

SciTech Connect (OSTI)

The influence of fluoride emissions from a modern aluminum smelter on concentrations of skeletal fluoride and dental fluorosis in a resident population of white-tailed deer was studied. The smelter was located on Mount Holly Plantation in South Carolina, and concentrations of skeletal fluoride in the deer collected at Mount Holly increased approximately five-fold 3 yr after the operation began. Increases in skeletal fluoride of less than two-fold were observed in deer obtained from Medway Plantation which has its nearest boundary 1.6 km from the smelter site. No dental fluorosis was observed in deer collected at Medway Plantation, but mild dental fluorosis was observed in a significant number of deer collected at Mount Holly Plantation. The dental fluorosis that was observed was not associated with incisor wear or with fluoride-induced molar wear. Osteofluorosis of mandibles or metacarpals was not observed in any of the deer obtained from either plantation. The data obtained from this study indicated that the presence of a modern aluminum smelter caused a detectable increase in concentration of skeletal fluoride in the resident population of white-tailed deer, but that no adverse health effects were seen.

Suttie, J.S.; Dickie, R.; Clay, A.B.; Nielsen, P.; Mahan, W.E.; Baumann, D.P.; Hamilton, R.J.

1987-01-01T23:59:59.000Z

448

Grain-boundary engineering markedly reduces susceptibility to intergranular hydrogen embrittlement in metallic materials  

E-Print Network [OSTI]

intergranular hydrogen embrittlement in metallic materials Keywords:    Hydrogen  embrittlement;  Intergranular strength  (“hydrogen  embrittlement” 1 ),  hydrogen?

Bechtle, Sabine

2009-01-01T23:59:59.000Z

449

Hydrogen storage with titanium-functionalized graphene  

E-Print Network [OSTI]

We report on hydrogen adsorption and desorption on titanium-covered graphene in order to test theoretical proposals to use of graphene functionalized with metal atoms for hydrogen storage. At room temperature titanium islands grow with an average diameter of about 10 nm. Samples were then loaded with hydrogen, and its desorption kinetics was studied by thermal desorption spectroscopy. We observe the desorption of hydrogen in the temperature range between 400K and 700 K. Our results demonstrate the stability of hydrogen binding at room temperature and show that hydrogen desorbs at moderate temperatures in line with what required for practical hydrogen-storage applications.

Mashoff, Torge; Tanabe, Shinichi; Hibino, Hiroki; Beltram, Fabio; Heun, Stefan

2013-01-01T23:59:59.000Z

450

Autothermal hydrogen storage and delivery systems  

DOE Patents [OSTI]

Processes are provided for the storage and release of hydrogen by means of dehydrogenation of hydrogen carrier compositions where at least part of the heat of dehydrogenation is provided by a hydrogen-reversible selective oxidation of the carrier. Autothermal generation of hydrogen is achieved wherein sufficient heat is provided to sustain the at least partial endothermic dehydrogenation of the carrier at reaction temperature. The at least partially dehydrogenated and at least partially selectively oxidized liquid carrier is regenerated in a catalytic hydrogenation process where apart from an incidental employment of process heat, gaseous hydrogen is the primary source of reversibly contained hydrogen and the necessary reaction energy.

Pez, Guido Peter (Allentown, PA); Cooper, Alan Charles (Macungie, PA); Scott, Aaron Raymond (Allentown, PA)

2011-08-23T23:59:59.000Z

451

Hydrogenation of single-walled carbon nanotubes  

E-Print Network [OSTI]

Towards the development of a useful mechanism for hydrogen storage, we have studied the hydrogenation of single-walled carbon nanotubes with atomic hydrogen using core-level photoelectron spectroscopy and x-ray absorption spectroscopy. We find that atomic hydrogen creates C-H bonds with the carbon atoms in the nanotube walls and such C-H bonds can be com-pletely broken by heating to 600 oC. We demonstrate approximately 65+/-15 at % hydrogenation of carbon atoms in the single-walled carbon nanotubes which is equivalent to 5.1+/-1.2 weight % hydrogen capacity. We also show that the hydrogenation is a reversible process.

Anton Nikitin; Hirohito Ogasawara; David Mann; Reinhard Denecke; Zhiyong Zhang; Hongjie Dai; KJ Cho; Anders Nilsson

2005-10-14T23:59:59.000Z

452

Hydrogen Outgassing from Lithium Hydride  

SciTech Connect (OSTI)

Lithium hydride is a nuclear material with a great affinity for moisture. As a result of exposure to water vapor during machining, transportation, storage and assembly, a corrosion layer (oxide and/or hydroxide) always forms on the surface of lithium hydride resulting in the release of hydrogen gas. Thermodynamically, lithium hydride, lithium oxide and lithium hydroxide are all stable. However, lithium hydroxides formed near the lithium hydride substrate (interface hydroxide) and near the sample/vacuum interface (surface hydroxide) are much less thermally stable than their bulk counterpart. In a dry environment, the interface/surface hydroxides slowly degenerate over many years/decades at room temperature into lithium oxide, releasing water vapor and ultimately hydrogen gas through reaction of the water vapor with the lithium hydride substrate. This outgassing can potentially cause metal hydriding and/or compatibility issues elsewhere in the device. In this chapter, the morphology and the chemistry of the corrosion layer grown on lithium hydride (and in some cases, its isotopic cousin, lithium deuteride) as a result of exposure to moisture are investigated. The hydrogen outgassing processes associated with the formation and subsequent degeneration of this corrosion layer are described. Experimental techniques to measure the hydrogen outgassing kinetics from lithium hydride and methods employing the measured kinetics to predict hydrogen outgassing as a function of time and temperature are presented. Finally, practical procedures to mitigate the problem of hydrogen outgassing from lithium hydride are discussed.

Dinh, L N; Schildbach, M A; Smith, R A; Balazs1, B; McLean II, W

2006-04-20T23:59:59.000Z

453

The DOE Hydrogen Baseline Survey: Assessing Knowledge and Opinions about Hydrogen Technology  

E-Print Network [OSTI]

and don't know about the hydrogen economy and hydrogen technologies. The data will ­ Guide educationThe DOE Hydrogen Baseline Survey: Assessing Knowledge and Opinions about Hydrogen Technology Christy Cooper U.S. Department of Energy Hydrogen Program #12;Overview Purpose: To learn what people know

454

Metallization of Fluid Hydrogen 3.1 Introduction to Metallic Hydrogen  

E-Print Network [OSTI]

Chapter 3 Metallization of Fluid Hydrogen 3.1 Introduction to Metallic Hydrogen 3.1.1 Some background on dense hydrogen Hydrogen, out of it the Universe evolved, every atom and leaf, marine iguana and apricot­smelling chanterelle. But my, my, what alchemy: nondescript H 2 --Diane Ackerman 1 -- Hydrogen

Louis, Ard

455

Fuel cell using a hydrogen generation system  

DOE Patents [OSTI]

A system is described for storing and generating hydrogen and, in particular, a system for storing and generating hydrogen for use in an H.sub.2/O.sub.2 fuel cell. The hydrogen storage system uses beta particles from a beta particle emitting material to degrade an organic polymer material to release substantially pure hydrogen. In a preferred embodiment of the invention, beta particles from .sup.63Ni are used to release hydrogen from linear polyethylene.

Dentinger, Paul M. (Sunol, CA); Crowell, Jeffrey A. W. (Castro Valley, CA)

2010-10-19T23:59:59.000Z

456

Photoelectrochemical Hydrogen Production  

SciTech Connect (OSTI)

The objectives of this project, covering two phases and an additional extension phase, were the development of thin film-based hybrid photovoltaic (PV)/photoelectrochemical (PEC) devices for solar-powered water splitting. The hybrid device, comprising a low-cost photoactive material integrated with amorphous silicon (a-Si:H or a-Si in short)-based solar cells as a driver, should be able to produce hydrogen with a 5% solar-to-hydrogen conversion efficiency (STH) and be durable for at least 500 hours. Three thin film material classes were studied and developed under this program: silicon-based compounds, copper chalcopyrite-based compounds, and metal oxides. With the silicon-based compounds, more specifically the amorphous silicon carbide (a-SiC), we achieved a STH efficiency of 3.7% when the photoelectrode was coupled to an a-Si tandem solar cell, and a STH efficiency of 6.1% when using a crystalline Si PV driver. The hybrid PV/a-SiC device tested under a current bias of -3~4 mA/cm{sup 2}, exhibited a durability of up to ~800 hours in 0.25 M H{sub 2}SO{sub 4} electrolyte. Other than the PV driver, the most critical element affecting the photocurrent (and hence the STH efficiency) of the hybrid PV/a-SiC device was the surface energetics at the a-SiC/electrolyte interface. Without surface modification, the photocurrent of the hybrid PEC device was ~1 mA/cm{sup 2} or lower due to a surface barrier that limits the extraction of photogenerated carriers. We conducted an extensive search for suitable surface modification techniques/materials, of which the deposition of low work function metal nanoparticles was the most successful. Metal nanoparticles of ruthenium (Ru), tungsten (W) or titanium (Ti) led to an anodic shift in the onset potential. We have also been able to develop hybrid devices of various configurations in a monolithic fashion and optimized the current matching via altering the energy bandgap and thickness of each constituent cell. As a result, the short-circuit photocurrent density of the hybrid device (measured in a 2-electrode configuration) increased significantly without assistance of any external bias, i.e. from ?1 mA/cm{sup 2} to ~5 mA/cm{sup 2}. With the copper chalcopyrite compounds, we have achieved a STH efficiency of 3.7% in a coplanar configuration with 3 a-Si solar cells and one CuGaSe{sub 2} photocathode. This material class exhibited good durability at a photocurrent density level of -4 mA/cm{sup 2} (“5% STH” equivalent) at a fixed potential (-0.45 VRHE). A poor band-edge alignment with the hydrogen evolution reaction (HER) potential was identified as the main limitation for high STH efficiency. Three new pathways have been identified to solve this issue. First, PV driver with bandgap lower than that of amorphous silicon were investigated. Crystalline silicon was identified as possible bottom cell. Mechanical stacks made with one Si solar cell and one CuGaSe{sub 2} photocathode were built. A 400 mV anodic shift was observed with the Si cell, leading to photocurrent density of -5 mA/cm{sup 2} at 0VRHE (compared to 0 mA/cm{sup 2} at the same potential without PV driver). We also investigated the use of p-n junctions to shift CuGaSe{sub 2} flatband potential anodically. Reactively sputtered zinc oxy-sulfide thin films was evaluated as n-type buffer and deposited on CuGaSe{sub 2}. Ruthenium nanoparticles were then added as HER catalyst. A 250 mV anodic shift was observed with the p-n junction, leading to photocurrent density at 0VRHE of -1.5 mA/cm{sup 2}. Combining this device with a Si solar cell in a mechanical stack configuration shifted the onset potential further (+400 mV anodically), leading to photocurrent density of -7 mA/cm{sup 2} at 0VRHE. Finally, we developed wide bandgap copper chalcopyrite thin film materials. We demonstrated that Se can be substituted with S using a simple annealing step. Photocurrent densities in the 5-6 mA/cm{sub 2} range were obtained with red 2.0eV CuInGaS{sub 2} photocathodes. With the metal oxide compounds, we have demonstrated that a WO{sub 3}-based hybrid p

Hu, Jian

2013-12-23T23:59:59.000Z

457

Biophysical studies of anhydrous peptide structure  

E-Print Network [OSTI]

peptide folding motifs in the absence of solvent, suggesting that in vacuo studies may potentially discern the role of solvation in protein structure. Ion mobility-mass spectrometry (IMMS) combines a gas-phase ion separation based on collision cross...

McLean, Janel Renee

2009-05-15T23:59:59.000Z

458

Project Profile: Thermochemical Storage with Anhydrous Ammonia...  

Office of Environmental Management (EM)

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

459

Carbon Aerogels for Hydrogen Storage  

SciTech Connect (OSTI)

This effort is focused on the design of new nanostructured carbon-based materials that meet the DOE 2010 targets for on-board vehicle hydrogen storage. Carbon aerogels (CAs) are a unique class of porous materials that possess a number of desirable structural features for the storage of hydrogen, including high surface areas (over 3000 m{sup 2}/g), continuous and tunable porosities, and variable densities. In addition, the flexibility associated with CA synthesis allows for the incorporation of modifiers or catalysts into the carbon matrix in order to alter hydrogen sorption enthalpies in these materials. Since the properties of the doped CAs can be systematically modified (i.e. amount/type of dopant, surface area, porosity), novel materials can be fabricated that exhibit enhanced hydrogen storage properties. We are using this approach to design new H{sub 2} sorbent materials that can storage appreciable amounts of hydrogen at room temperature through a process known as hydrogen spillover. The spillover process involves the dissociative chemisorption of molecular hydrogen on a supported metal catalyst surface (e.g. platinum or nickel), followed by the diffusion of atomic hydrogen onto the surface of the support material. Due to the enhanced interaction between atomic hydrogen and the carbon support, hydrogen can be stored in the support material at more reasonable operating temperatures. While the spillover process has been shown to increase the reversible hydrogen storage capacities at room temperature in metal-loaded carbon nanostructures, a number of issues still exist with this approach, including slow kinetics of H{sub 2} uptake and capacities ({approx} 1.2 wt% on carbon) below the DOE targets. The ability to tailor different structural aspects of the spillover system (i.e. the size/shape of the catalyst particle, the catalyst-support interface and the support morphology) should provide valuable mechanistic information regarding the critical aspects of the spillover process (i.e. kinetics of hydrogen dissociation, diffusion and recombination) and allow for optimization of these materials to meet the DOE targets for hydrogen storage. In a parallel effort, we are also designing CA materials as nanoporous scaffolds for metal hydride systems. Recent work by others has demonstrated that nanostructured metal hydrides show enhanced kinetics for reversible hydrogen storage relative to the bulk materials. This effect is diminished, however, after several hydriding/dehydriding cycles, as the material structure coarsens. Incorporation of the metal hydride into a porous scaffolding material can potentially limit coarsening and, therefore, preserve the enhanced kinetics and improved cycling behavior of the nanostructured metal hydride. Success implementation of this approach, however, requires the design of nanoporous solids with large accessible pore volumes (> 4 cm{sup 3}/g) to minimize the gravimetric and volumetric capacity penalties associated with the use of the scaffold. In addition, these scaffold materials should be capable of managing thermal changes associated with the cycling of the incorporated metal hydride. CAs are promising candidates for the design of such porous scaffolds due to the large pore volumes and tunable porosity of aerogel framework. This research is a joint effort with HRL Laboratories, a member of the DOE Metal Hydride Center of Excellence. LLNL's efforts have focused on the design of new CA materials that can meet the scaffolding requirements, while metal hydride incorporation into the scaffold and evaluation of the kinetics and cycling performance of these composites is performed at HRL.

Baumann, T F; Worsley, M; Satcher, J H

2008-08-11T23:59:59.000Z

460

Hydrothermal synthesis of new rare earth silicate fluorides: A novel class of polar materials  

SciTech Connect (OSTI)

Polar crystals provide an interesting avenue for materials research both in the structures they form and the properties they possess. This work describes the hydrothermal synthesis and structural characterization of three novel silicate fluorides. Compound (1), LiY{sub 3}(SiO{sub 4}){sub 2}F{sub 2} crystallizes in space group C2/c, with a=17.651(4) A, b=4.8868(10) A, c=11.625(2) A and {beta}=131.13(3) Degree-Sign . BaY{sub 2}(Si{sub 2}O{sub 7})F{sub 2} (2) crystallizes in space group P-1, with a=5.1576(10) A, b=6.8389(14) A, c=11.786(2) A, {alpha}=93.02(3) Degree-Sign , {beta}=102.05(3) Degree-Sign and {gamma}=111.55(3) Degree-Sign . Finally, the structure of Ba{sub 2}Y{sub 3}(SiO{sub 4}){sub 2}F{sub 5} (3) was determined in the polar orthorhombic space group Pba2, having unit cell parameters a=8.8864(18) A, b=12.764(3) A and c=5.0843(10) A. The structures are compared based on their building blocks and long range polarities. Aligned silicate tetrahedra segregated into a single layer in (3) impart the observed polarity. - Graphical abstract: The polar structure of Ba{sub 2}Y{sub 3}(SiO{sub 4}){sub 2}F{sub 5}. Highlights: Black-Right-Pointing-Pointer Natural yttrium silicate fluoride minerals are briefly reviewed. Black-Right-Pointing-Pointer The synthesis and structures of LiY{sub 3}(SiO{sub 4}){sub 2}F{sub 2}, BaY{sub 2}(Si{sub 2}O{sub 7})F{sub 2} and Ba{sub 2}Y{sub 3}(SiO{sub 4}){sub 2}F{sub 5} are discussed. Black-Right-Pointing-Pointer Ba{sub 2}Y{sub 3}(SiO{sub 4}){sub 2}F{sub 5} crystallizes in the polar space group Pba2. Black-Right-Pointing-Pointer Polarity occurs primarily through aligned silicate tetrahedra in a segregated layer.

McMillen, Colin D., E-mail: cmcmill@clemson.edu [Department of Chemistry and Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, 485 H.L. Hunter Laboratories, Clemson, SC 29634 (United States); Emirdag-Eanes, Mehtap, E-mail: mehtapemirdag@iyte.edu.tr [Department of Chemistry, Izmir Institute of Technology, Gulbahce koyu, Urla, Izmir 35430 (Turkey)] [Department of Chemistry, Izmir Institute of Technology, Gulbahce koyu, Urla, Izmir 35430 (Turkey); Stritzinger, Jared T., E-mail: jstritz@clemson.edu [Department of Chemistry and Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, 485 H.L. Hunter Laboratories, Clemson, SC 29634 (United States); Kolis, Joseph W., E-mail: kjoseph@clemson.edu [Department of Chemistry and Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, 485 H.L. Hunter Laboratories, Clemson, SC 29634 (United States)

2012-11-15T23:59:59.000Z

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


461

Hydrogen Energy Stations: Poly-Production of Electricity, Hydrogen, and Thermal Energy  

E-Print Network [OSTI]

500/kW Anode tail gas Hydrogen Engine Gen-Set ICE/GeneratorFuel Cell Deployment and Hydrogen Infrastructure, WorldwideOffice (2005), “Florida Hydrogen Business Partnership,”

Lipman, Timothy; Brooks, Cameron

2006-01-01T23:59:59.000Z

462

Hydrogen Production from Hydrogen Sulfide in IGCC Power Plants  

SciTech Connect (OSTI)

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

463

Method and System for Hydrogen Evolution and Storage  

DOE Patents [OSTI]

A method and system for storing and evolving hydrogen employ chemical compounds that can be hydrogenated to store hydrogen and dehydrogenated to evolve hydrogen. A catalyst lowers the energy required for storing and evolving hydrogen. The method and system can provide hydrogen for devices that consume hydrogen as fuel.

Thorn, David L. (Los Alamos, NM); Tumas, William (Los Alamos, NM); Hay, P. Jeffrey (Los Alamos, NM); Schwarz, Daniel E. (Los Alamos, NM); Cameron, Thomas M. (Los Alamos, NM)

2008-10-21T23:59:59.000Z

464

Method and system for hydrogen evolution and storage  

DOE Patents [OSTI]

A method and system for storing and evolving hydrogen (H.sub.2) employ chemical compounds that can be hydrogenated to store hydrogen and dehydrogenated to evolve hydrogen. A catalyst lowers the energy required for storing and evolving hydrogen. The method and system can provide hydrogen for devices that consume hydrogen as fuel.

Thorn, David L.; Tumas, William; Hay, P. Jeffrey; Schwarz, Daniel E.; Cameron, Thomas M.

2012-12-11T23:59:59.000Z

465

Hydrogen Fuel Quality - Focus: Analytical Methods Development & Hydrogen  

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

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

466

Hydrogen Pinch Analysis of Preemraff Göteborg and Preemraff Lysekil - A systematic analysis of hydrogen distribution systems.  

E-Print Network [OSTI]

??Harder regulations regarding dearomatization and desulphurization of fuels in addition to increased yield of valuable products are making hydrogen scarce in the refinery process. Hydrogen… (more)

Andersson, Viktor

2010-01-01T23:59:59.000Z

467

Hydrogen Energy Stations: Poly-Production of Electricity, Hydrogen, and Thermal Energy  

E-Print Network [OSTI]

500/kW Anode tail gas Hydrogen Engine Gen-Set ICE/Generatorliter V-10 engine and about 26 kilograms of hydrogen, stored

Lipman, Timothy; Brooks, Cameron

2006-01-01T23:59:59.000Z

468

NREL Wind to Hydrogen Project: Renewable Hydrogen Production for Energy Storage & Transportation (Presentation)  

SciTech Connect (OSTI)

Presentation about NREL's Wind to Hydrogen Project and producing renewable hydrogen for both energy storage and transporation, including the challenges, sustainable pathways, and analysis results.

Ramsden, T.; Harrison, K.; Steward, D.

2009-11-16T23:59:59.000Z

469

DOE Hydrogen and Fuel Cells Program Record 5037: Hydrogen Storage Materials- 2004 vs. 2006  

Broader source: Energy.gov [DOE]

This program record from the Department of Energy's Hydrogen and Fuel Cells Program provides information about hydrogen storage materials (2004 vs. 2006).

470

Wind Energy and Production of Hydrogen and Electricity -- Opportunities for Renewable Hydrogen: Preprint  

SciTech Connect (OSTI)

An assessment of options for wind/hydrogen/electricity systems at both central and distributed scales provides insight into opportunities for renewable hydrogen.

Levene, J.; Kroposki, B.; Sverdrup, G.

2006-03-01T23:59:59.000Z

471

The transported entropies of ions in solid state fluorides and beta-alumina  

SciTech Connect (OSTI)

The technical relevance of reversible heat effects is discussed with reference to high temperature batteries and electrolysis systems. The transported entropies of Na{sup +} in solid state mixtures of NaF and Na{sub 3}AlF{sub 6} are presented. The transported entropies are S{sup *cry}{sub Na{sup +}} = 140 {+-} 7 J K{sup {minus}1} mol{sup {minus}1} for cryolite, S{sup *NaF}{sub Na{sup +}} = 81 {+-} 8 J K{sup {minus}1} mol{sup {minus}1} for sodium fluoride and S{sup *{beta}}{sub Na{sup +}} = 60 {+-} 5 J K{sup {minus}1} mol{sup {minus}1} for sodium {beta}{double_prime}-alumina at the temperature range 380--500 C. The value obtained for sodium in the solid cryolite is higher than transported entropy of Na{sup +} in other solid sodium conductors and makes the authors predict that the transported entropy for Na{sup +} in the molten electrolyte mixture for aluminum production is substantial, and that so are the reversible heat effects in the aluminum electrolysis cell.

Sharivker, V.S.; Ratkje, S.K. [Univ. of Trondheim (Norway)

1996-10-01T23:59:59.000Z

472

Low-level fluoride trapping studies experimental work for computer modeling program  

SciTech Connect (OSTI)

The material presented in this report involved experimental work performed to assist in determining the constants for a computer modeling program being developed by Production Engineering for use in trap design. Included in this study is bed distribution studies to define uranium loading on alumina (Al/sub 2/O/sub 3/) and sodium fluoride (NaF) with respect to bed zones. A limited amount of work was done on uranium penetration into NaF pellets. Only the experimental work is reported here; Production Engineering will use this data to develop constants for the computer model. Some of the significant conclusions are: NaF has more capacity to load UF/sub 6/, but Al/sub 2/O/sub 3/ distributes the load more equally; velocity, system pressure, and operating temperature influence uranium loading; and in comparative tests NaF had a loading of 25%, while Al/sub 2/O/sub 3/ was 13%. 2 refs., 10 figs., 5 tabs.

Russell, R.G.

1988-11-21T23:59:59.000Z

473

Energy-Efficient, High-Color-Rendering LED Lamps Using Oxyfluoride and Fluoride Phosphors  

SciTech Connect (OSTI)

LED lamps using phosphor downconversion can be designed to replace incandescent or halogen sources with a 'warm-white' correlated color temperature (CCT) of 2700-3200 K and a color rendering index (CRI) greater than 90. However, these lamps have efficacies of {approx}70% of standard 'cool-white' LED packages (CCT = 4500-6000 K; CRI = 75-80). In this report, we describe structural and luminescence properties of fluoride and oxyfluoride phosphors, specifically a (Sr,Ca){sub 3}(Al,Si)O{sub 4}(F,O):Ce{sup 3+} yellow-green phosphor and a K{sub 2}TiF{sub 6}:Mn{sup 4+} red phosphor, that can reduce this gap and therefore meet the spectral and efficiency requirements for high-efficacy LED lighting. LED lamps with a warm-white color temperature (3088 K), high CRI (90), and an efficacy of {approx}82 lm/W are demonstrated using these phosphors. This efficacy is {approx}85% of comparable cool-white lamps using typical Y{sub 3}Al{sub 5}O{sub 12}:Ce{sup 3+}-based phosphors, significantly reducing the efficacy gap between warm-white and cool-white LED lamps that use phosphor downconversion.

Setlur, A.; Radkov, E; Henderson, C; Her, J; Srivastava, A; Karkada, N; Kishore, M; Kumar, N; Aesram, D; et al.

2010-01-01T23:59:59.000Z

474

Compatibility of strontium-90 fluoride with containment materials at elevated temperatures  

SciTech Connect (OSTI)

The use of /sup 90/SrF/sub 2/ as a heat-source fuel requires that the /sup 90/Sr be adequately contained during heat-source service. A program for determining the compatibility of /sup 90/SrF/sub 2/ with containment materials at heat-source operating temperatures is described. These compatibility studies included: initial and supplemental screening tests; WESF /sup 90/SrF/sub 2/ capsule demonstration tests; thermal gradient test; and long-term tests. TZM, Haynes Alloy 25, and Hastelloy C-276 were the three materitals selected for evaluation at 600/sup 0/, 800/sup 0/ and 1000/sup 0/C for periods up to 30,000 h. Results showed that all three alloys suffered substantial attack when exposed to the /sup 90/SrF/sub 2/, although the TZM was more resistant to attack than the Hastelloy C-276 and Haynes Alloy 25. The latter two alloys appeared to provide about equal resistance to fluoride attack for exposures longer than about 12,000 h. Attack of the alloys tested by the /sup 90/SrF/sub 2/ was due primarily to impurities.

Fullam, H.T.

1981-08-01T23:59:59.000Z

475

Estimating changes in urban ozone concentrations due to life cycle emissions from hydrogen transportation systems  

E-Print Network [OSTI]

to hydrogen pathways: (1) on-site hydrogen production; (2)central hydrogen production with pipeline delivery;and (3) central hydrogen production with liquid hydrogen

Wang, Guihua; Ogden, Joan M; Chang, Daniel P.Y.

2007-01-01T23:59:59.000Z

476

An Analysis of Near-Term Hydrogen Vehicle Rollout Scenarios for Southern California  

E-Print Network [OSTI]

Water High-pressure hydrogen compressor Compressed hydrogenWater High-pressure hydrogen compressor Compressed hydrogenReciprocating gas compressor Figure 13 Hydrogen refueling

Nicholas, Michael A; Ogden, J

2010-01-01T23:59:59.000Z

477

Agenda for the Hydrogen Delivery and Onboard Storage Analysis...  

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

Hydrogen Delivery and Onboard Storage Analysis Workshop Agenda for the Hydrogen Delivery and Onboard Storage Analysis Workshop Agenda for the Hydrogen Delivery and Onboard Storage...

478

The U.S. National Hydrogen Storage Project Overview (presentation...  

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

The U.S. National Hydrogen Storage Project Overview (presentation) The U.S. National Hydrogen Storage Project Overview (presentation) Status of Hydrogen Storage Materials R&D...

479

Virtual Center of Excellence for Hydrogen Storage - Chemical...  

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

Virtual Center of Excellence for Hydrogen Storage - Chemical Hydrides Virtual Center of Excellence for Hydrogen Storage - Chemical Hydrides Presentation from the Hydrogen Storage...

480

Determining the Lowest-Cost Hydrogen Delivery Mode  

E-Print Network [OSTI]

liquefaction and liquid hydrogen storage tanks are needed.low cost of liquid hydrogen storage is offset by the highrefueling pressure. Hydrogen storage requirements vary among

Yang, Christopher; Ogden, Joan M

2008-01-01T23:59:59.000Z

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


481

Hydrogen and electricity: Parallels, interactions,and convergence  

E-Print Network [OSTI]

or grows rapidly. Because hydrogen storage can be relativelyas it is assumed that hydrogen storage can accommodate ?this analysis is that hydrogen storage is only built to

Yang, Christopher

2008-01-01T23:59:59.000Z

482

Fundamental Studies of Diffusion and Reactions in Hydrogen Storage Materials  

E-Print Network [OSTI]

novel reversible hydrogen storage materials”, J. Alloysrelationship to enhanced hydrogen storage properties”, J.on the reversi- ble hydrogen storage properties of the

Van de Walle, Chris G; Peles, Amra; Janotti, Anderson; Wilson-Short, Gareth

2008-01-01T23:59:59.000Z

483

Implementing a Hydrogen Energy Infrastructure: Storage Options and System Design  

E-Print Network [OSTI]

impact of improved hydrogen storage may be through makingand M. Gardiner, Hydrogen Storage Options: Technologies andscience related to hydrogen storage could change how a

Ogden, Joan M; Yang, Christopher

2005-01-01T23:59:59.000Z

484

Determining the lowest-cost hydrogen delivery mode  

E-Print Network [OSTI]

liquefaction and liquid hydrogen storage tanks are needed.low cost of liquid hydrogen storage is offset by the highrefueling pressure. Hydrogen storage requirements vary among

Yang, Christopher; Ogden, Joan M

2007-01-01T23:59:59.000Z

485

Hydrogen Production and Utilization of Agricultural Residues by Thermotoga Species.  

E-Print Network [OSTI]

??Hydrogen can be a renewable energy source to replace conventional fossil fuels. Compared to current hydrogen production processes by consuming fossil fuels, biological hydrogen production… (more)

Zhu, Hongbin

2007-01-01T23:59:59.000Z

486

PHOTOCATALYTIC AND PHOTOELECTROCHEMICAL HYDROGEN PRODUCTION ON STRONTIUM TITANATE SINGLE CRYSTALS  

E-Print Network [OSTI]

AND PHOTOELECTROCHEMICAL HYDROGEN PRODUCTION ON STRONTIUMAND PHOTOELECTROCHEHICAL HYDROGEN PRODUCTION ON STRONTIUMand photocatalytic hydrogen production from SrTi0 3 crystals

Wagner, F.T.

2012-01-01T23:59:59.000Z

487

Hydrogen and electricity: Parallels, interactions,and convergence  

E-Print Network [OSTI]

Because of the focus on hydrogen production and refuelinglarge impacts that hydrogen production and conversion wouldresources available for hydrogen production. This is a major

Yang, Christopher

2008-01-01T23:59:59.000Z

488

Bio-Derived Liquids to Hydrogen Distributed Reforming Working...  

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

Working Group (BILIWG), Hydrogen Separation and Purification Working Group (PURIWG) & Hydrogen Production Technical Team Bio-Derived Liquids to Hydrogen Distributed Reforming...

489

Analytical approaches to photobiological hydrogen production in unicellular green algae  

E-Print Network [OSTI]

Photofermentation and hydrogen production upon sulphurG, Happe T (2008) Hydrogen production by ChlamydomonasA, Happe T (2001) Hydrogen production. Green algae as a

Hemschemeier, Anja; Melis, Anastasios; Happe, Thomas

2009-01-01T23:59:59.000Z

490

The role of biomass in California's hydrogen economy  

E-Print Network [OSTI]

economic analysis of hydrogen production by gasi?cation of2005. Biomass to hydrogen production detailed design andof using biomass for hydrogen production, particularly with

Parker, Nathan C; Ogden, Joan; Fan, Yueyue

2009-01-01T23:59:59.000Z

491

Update of Hydrogen from Biomass - Determination of the Delivered...  

Office of Environmental Management (EM)

Update of Hydrogen from Biomass - Determination of the Delivered Cost of Hydrogen: Milestone Completion Report Update of Hydrogen from Biomass - Determination of the Delivered Cost...

492

DEVELOPMENT OF A HIGH STRENGTH, HYDROGEN-RESISTANT AUSTENITIC ALLOY  

E-Print Network [OSTI]

H. G. Nelson, "Hydrogen Embrittlement Testing," ASTM STPis susceptible to hydrogen embrittlement but also indicatesis sensitive to hydrogen embrittlement. Deformation-Induced

Chang, K.M.

2010-01-01T23:59:59.000Z

493

Sandia National Laboratories: Tech Reference for Hydrogen Compatibilit...  

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

Password: Submit Tagged with: Energy Security * Fuel Cells * Hydrogen * Hydrogen and Fuel Cells * Hydrogen Compatibility of Materials * Renewable Energy * solar This post is...

494

Hydrogen Storage Materials Requirements to Meet the 2017 On Board...  

Energy Savers [EERE]

Materials Requirements to Meet the 2017 On Board Hydrogen Storage Technical Targets Hydrogen Storage Materials Requirements to Meet the 2017 On Board Hydrogen Storage Technical...

495

Evaluation of Natural Gas Pipeline Materials for Hydrogen Science...  

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

Evaluation of Natural Gas Pipeline Materials for Hydrogen Science Evaluation of Natural Gas Pipeline Materials for Hydrogen Science Presentation by 04-Adams to DOE Hydrogen...

496

The role of biomass in California's hydrogen economy  

E-Print Network [OSTI]

costs to estimate hydrogen pipeline costs. Research Report,25%, 50%) used pipeline delivery of hydrogen and also sitedthe ?ow rate of hydrogen through the pipeline. The pipe is

Parker, Nathan C; Ogden, Joan; Fan, Yueyue

2009-01-01T23:59:59.000Z

497

Technical and Economic Assessment of Regional Hydrogen Transition Strategies  

E-Print Network [OSTI]

Costs to Estimate Hydrogen Pipeline Costs,” Report No. UCD-travel distance and pipeline length for hydrogen deliveryLos Angeles. Hydrogen Infrastructure Layout – Pipelines and

Ogden, Joan; Yang, Christopher; Nicholas, Michael

2007-01-01T23:59:59.000Z

498

Comparing air quality impacts of hydrogen and gasoline  

E-Print Network [OSTI]

production and gaseous hydrogen pipeline delivery systems (ratios relative to the hydrogen pipeline pathway Pollutantvia SMR with gaseous hydrogen pipeline delivery, and central

Sperling, Dan; Wang, Guihua; Ogden, Joan M.

2008-01-01T23:59:59.000Z

499

Delivering Renewable Hydrogen: A Focus on Near-Term Applications...  

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

Delivering Renewable Hydrogen: A Focus on Near-Term Applications Delivering Renewable Hydrogen: A Focus on Near-Term Applications Agenda for the Delvering Renewable Hydrogen...

500

Bio-Derived Liquids to Hydrogen Distributed Reforming Working...  

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

Contact Time Hydrogen Generator, Ke Liu, GE Global Research Hydrogen from Biomass by Autothermal Reforming, Lanny D. Schmidt, University of Minnesota Low-Cost Hydrogen from Ethanol...