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in subjects: "Sulfur"

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Sonic enhanced ash agglomeration and sulfur capture

The major objective of the Phase 1 test program is to confirm the feasibility of the Manufacturing and Technology Conversion International, Inc. bimodal particle size approach to enhance particulate control by acoustic ash agglomeration. An ancillary objective of the Phase 1 effort is to demonstrate and confirm the feasibility of an acoustic field to enhance sulfur capture by increasing sorbent reactivity. Phase 1 tests are designed to cover the frequency range between 50 and 1400 Hz, establish… more

Date: January 1, 1991

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Survey of selected agencies conducted to determine the extent to which the nation's coals are adequately characterized

A survey was conducted to determine the extent to which the nation's coals were adequately characterized. Questionnaires were sent to 81 agencies in the coal community selected to form a representative cross section of the organizations concerned with coal characterization. Fifty-nine completed questionnaires were received. Respondents included representatives of the agencies with the longest experience in characterization and those in the best position to know the status of our knowledge … more

Date: October 1, 1977

Creator: Hower, J. M.; Davis, A.; Dolsen, C. P. & Spackman, W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Development program on pressurized fluidized-bed combustion. Quarterly report, January 1, 1975--April 1, 1975. [Use of precalcined and uncalcined limestone and dolomite; work on inorganic constituents of combustion flue gas]

No Description Available.

Date: April 1, 1975

Creator: Vogel, G. J.; Cunningham, P. T.; Hubble, W.; Lee, S.; Lenc, J.; Montagna, J. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Hot gas desulfurization with oxides of zinc, iron, and vanadium

The objective of this study is to develop an improved sorbent which can reduce H{sub 2}S levels up to 1 ppmv or less, which can stabilize zinc, and produce economically recoverable amounts of elemental sulfur during regeneration. For this purpose, the desulfurization performance of sorbents prepared by the addition of various amounts of V{sub 2}O{sub 5} to the zinc ferrite sorbent is investigated.

Date: January 1, 1992

Creator: Akyurtlu, J.F. & Akyurtlu, A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Influences of clouds and rain on the large-scale transport and deposition of sulfur

This paper describes the application of a three-dimensional, global-scale Eulerian model with an explicit description of cloud and chemical processes. Simulation results describing the transport of sulfur from North America and Europe across the north Atlantic Ocean during a climatological July are presented. Wet deposition was found to contribute slightly more to total sulfur deposition than dry deposition, a feature explained by the large amounts of precipitation during this month. The wet de… more

Date: July 1, 1991

Creator: Luecken, D.J.; Berkowitz, C.M. & Easter, R.C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Walker Branch Watershed: site description and research scope

Walker Branch Watershed is located on the Oak Ridge Reservation in the Ridge and Valley section of Tennessee. The watershed (97 ha consisting of 2 subwatersheds) is underlain by Knox Dolomite; soils formed over the dolomitic substrate are deep, well-drained Typic Paleudults. The watershed is forested. The overstory is predominantly oak-hickory with lesser amounts of pine and mesic hardwoods. The Walker Branch Watershed Project was initiated in 1967 to: relate the productivity and water quality … more

Date: January 1, 1977

Creator: Harris, W. F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Process for cleaning and removal of sulfur compounds from low Btu gases. Quarterly summary report, October--December 1977

Problems which occurred in the startup of the remodelled process development unit are described. The extraction section of the plant performed well with sulfur recoveries exceeding the design value of 95%. (LTN)

Date: January 1, 1978

Creator: Moore, R. H.; Ham, D. G.; Mitchell, D. H.; Robertus, R. J. & Stegen, G. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Economics of microwave plasma dissociation of H sub 2 S

The conventional treatment technology for hydrogen-sulfide is based on Claus chemistry; elemental sulfur is recovered but the hydrogen is lost as water although the fuel value of the hydrogen is recovered as heat. A new waste treatment technology, reported in the Soviet literature, has been validated in an experimental program at Argonne National Laboratory. The new technology uses microwave energy to dissociate hydrogen-sulfide and recovers both elemental sulfur and hydrogen. Recovery of the h… more

Date: January 1, 1992

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

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Temperature dependence of the fraction of re-emitted positrons, the positron work function, and the positronium fraction for Cu(III)+S

A beam of 1 keV positrons incident on a Cu(111)+S surface has been used to study the dependence on temperature of the positron work function (phi/sub +/), the yield of re-emitted positrons (Y) and of the positronium (Ps) fraction. A positive dependence of the slow-positron yield on temperature is found which is attributed in part to a reduction in the magnitude of phi/sub +/ (approx. 25%) at 50 K relative to its value at 300 K. A similar, though weaker, positive dependence on temperature was se… more

Date: January 1, 1982

Creator: Schultz, P.J. & Lynn, K.G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Thermodynamics of the hydrodenitrogenation of carbazole

A thermodynamic analysis, based on accurate experimental Gibbs energies of formation, was completed for the key hydrogen-consuming steps in the HDN reaction network for carbazole. The results were compared with literature reaction studies. The concept of crossover temperature'' is shown to be a valuable tool in the interpretation of literature reaction-study results. Methods of nitrogen removal from aromatic materials are discussed in light of the findings of the thermodynamic analysis. It is c… more

Date: October 1, 1991

Creator: Steele, W. V. & Chirico, R. D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Development program on pressurized fluidized-bed combustion. Quarterly report, October 1, 1974--January 1, 1975. [Air pollution control]

No Description Available.

Date: January 1, 1975

Creator: Vogel, G. J.; Cunningham, P. T.; Hubble, W.; Lenc, J.; Montagna, J.; Panek, A. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Thermochemical water-splitting cycle, bench-scale investigations and process engineering. Annual report, October 1, 1978-September 30, 1979

A program to investigate thermochemical water splitting has been under way at General Atomic Company (GA) since October 1972. This document is an annual progress report of Department of Energy (DOE) sponsored process development work on the GA sulfur-iodine thermochemical water splitting cycle. The work consisted of laboratory bench-scale investigations, demonstration of the process in a closed-loop cycle demonstrator, and process engineering design studies. A bench-scale system, consisting of … more

Date: March 1980

Creator: Caprioglio, G.; McCorkle, K. H.; Besenbruch, G. E. & Rode, J. S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Coal derived fuel gases for molten carbonate fuel cells

Product streams from state-of-the-art and future coal gasification systems are characterized to guide fuel cell program planners and researchers in establishing performance goals and developing materials for molten carbonate fuel cells that will be compatible with gasifier product gases. Results are presented on: (1) the range of gasifier raw-gas compositions available from the major classes of coal gasifiers; (2) the degree of gas clean-up achievable with state-of-the-art and future gas clean-… more

Date: November 1, 1979

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Personnel dosimetry intercomparison studies at the ORNL Health Physics Research Reactor

The Health Physics Research Reactor (HPRR), used unshielded, with a 12-cm-thick Lucite shield or a 13-cm-thick steel shield, provided three neutron and gamma-ray spectra for personnel dosimetry intercomparison studies. The characterisitcs of these fields, such as neutron energy spectrum, intensity, and uniformity, had been measured previously during nuclear accident dosimetry studies. Exposures were made to simulate total exposures likely to be encountered in personnel dosimetry. Neutron dose e… more

Date: January 1, 1977

Creator: Dickson, H.W. & Gilley, L.W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Investigation on the utilization of coal fly ash as amendment to compost for vegetation in acid soil

Application of fly ash-amended composts as manure enhances the crop yield of certain plants like corn, sorghum, collard and mustard greens. Organic compost made out of grass and leaves (home-made) is better than the commercial composts for amendment with fly ash. A 20--40% fly ash in the amended compost and a soil to ash-amended compost ratio of 3:1 are recommended for making bed for plantation. Organic compost mixed with fly ash, due to reduced porosity, will help the bed to retain water and c… more

Date: August 1, 1991

Creator: Menon, M.P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Sludge application program at the Savannah River Plant

Since 1980 a research program has been conducted at the Savannah River Plant to evaluate the use of domestic sewage sludge to enhance forest productivity. The objectives of the program have been to determine the cost effectiveness and environmental impact of using sewage sludge as a soil conditioner and slow-release fertilizer. The potential impacts of sludge application on nutrient cycling, organic carbon budgets, forest wildlife, and biomass production have been studied. Soil, soil water, gro… more

Date: January 1, 1985

Creator: Corey, J. C.; Lower, M. W. & Davis, C. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Hydrogen production by the GA sulfur-iodine process: a progress report

The progress of the overall total development effort of the General Atomic (GA) sulfur-iodine thermochemical water-splitting cycle over the last two years is summarized. The major accomplishments have been: significant improvements in the chemistry of the process; development, review, and revision of an engineering flowsheet, resulting in a thermal process efficiency of 47%; screening, identification, and testing of potential materials-of-construction for the corrosive process fluids; small-sca… more

Date: May 1, 1980

Creator: Besenbruch, G.E.; McCorkle, K.H.; Norman, J.H.; O'Keefe, D.R.; Schuster, J.R.; Trester, P.W. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Method of recovery of alkali-metal constituents from coal-conversion residues. [Patent application]

A coal gasification operation or similar conversion process is carried out in the presence of an alkali metal-containing catalyst producing char particles containing alkali metal residues. Alkali metal constituents are recovered from the particles by burning the particles to increase their size and density and then leaching the particles of increased size and density with water, to extract the water-soluble alkali metal constituents.

Date: April 22, 1981

Item Type: Patent

Partner: UNT Libraries Government Documents Department

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Development of a solid absorption process for removal of sulfur from fuel gas. First quarterly technical report

Battelle Pacific Northwest Laboratories has begun to develop a project for removing sulfur compounds from fuel gases at elevated temperature (> 700/sup 0/C) based on the use of molten mixtures of alkali metal carbonates and calcium carbonate as the active reactants. The sulfur removal capacity of the molten salt mixture may be regenerated by stripping with CO/sub 2/ and steam, usually at a reduced temperature. In this process, the molten salt mixture is contained within the pores of a porous ce… more

Date: May 1, 1980

Creator: Stegen, G. E. & Olson, K. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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X rays generated in the interaction of subpicosecond laser pulses with solid targets

We are investigating the generation of short pulse short wavelength x-rays for pumping inner-shell x-ray lasers by photo-ionization. In contrast with previous proposals, we are looking at the use of a single line as an efficient means of pumping these lasers. As a first step we are optimizing the flashlamp x-ray conversion efficiency and characterizing the x-ray pulse length. 18 refs., 5 figs., 2 tabs.

Date: January 1, 1991

Creator: Kyrala, G. A.; Wahlin, E. K.; Fulton, R. D.; Schappert, G. T.; Jones, L. A.; Taylor, A. J. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Synthesis gas demonstration plant program, Phase I. Deliverable No. 28: plans for use and disposition of products

As part of Phase I of the Synthesis Gas Demonstration Plant Program, plans for marketing all usable products and by-products from the Demonstration Plant and for disposing of all nonusable by-products and waste streams are to be developed. This plan has been prepared to identify the means of disposition of products, by-products and waste streams. The Demonstration Plant has been designed to produce a synthesis gas suitable for use in the production of ammonia. The plant also produces sulfur, su… more

Date: September 1, 1979

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Surface extended x-ray absorption fine structure of low-Z absorbates using fluorescence detection

Comparison of x-ray fluorescence yield (FY) and electron yield surface extended x-ray absorption fine structure spectra above the S K-edge for c(2 x 2) S on Ni(100) reveals an order of magnitude higher sensitivity of the FY technique. Using FY detection, thiophene (C/sub 4/H/sub 4/S) chemisorption on Ni(100) is studied with S coverages down to 0.08 monolayer. The molecule dissociates at temperatures as low as 100K by interaction with fourfold hollow Ni sites. Blocking of these sites by oxygen l… more

Date: May 1, 1985

Creator: Stoehr, J.; Kollin, E.B.; Fischer, D.A.; Hastings, J.B.; Zaera, F. & Sette, F.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Fractionally distilled SRC-I, SRC-II, EDS, H-Coal and ITSL direct coal liquefaction process materials: a comparative summary of chemical analysis and biological testing

This document reports and compares the results compiled from chemical analyses and biological testing of coal liquefaction process materials which were fractionally distilled, after production, into various comparable boiling-point range cuts. Comparative analyses were performed on solvent refined coal (SRC)-I, SRC-II, H-Coal, EDS an integrated two-stage liquefaction (ITSL) distillate materials. Mutagenicity and carcinogenicity assays were conducted in conjunction with chromatographic and mass … more

Date: July 1, 1985

Creator: Wright, C. W.; Later, D. W.; Dauble, D. D. & Wilson, B. W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Experimental techniques for dry deposition measurements

Recent experimental approaches for measurement of dry surface fluxes of sulfur compounds are reviewed and discussed with emphasis on surface layer studies. Evidence indicates that natural surfaces are sources as well as sinks for sulfur. Field results are related to requirements and implications in future studies of surface sulfur fluxes.

Date: October 1, 1979

Creator: Droppo, J. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department