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Sonic enhanced ash agglomeration and sulfur capture

Description: 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
Partner: UNT Libraries Government Documents Department
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Survey of selected agencies conducted to determine the extent to which the nation's coals are adequately characterized

Description: 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.
Partner: UNT Libraries Government Documents Department
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Hot gas desulfurization with oxides of zinc, iron, and vanadium

Description: 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.
Partner: UNT Libraries Government Documents Department
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Influences of clouds and rain on the large-scale transport and deposition of sulfur

Description: 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.
Partner: UNT Libraries Government Documents Department
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Walker Branch Watershed: site description and research scope

Description: 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.
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

Description: 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.
Partner: UNT Libraries Government Documents Department
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Economics of microwave plasma dissociation of H sub 2 S

Description: 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.
Partner: UNT Libraries Government Documents Department
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Temperature dependence of the fraction of re-emitted positrons, the positron work function, and the positronium fraction for Cu(III)+S

Description: 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.
Partner: UNT Libraries Government Documents Department
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Thermodynamics of the hydrodenitrogenation of carbazole

Description: 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.
Partner: UNT Libraries Government Documents Department
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Thermochemical water-splitting cycle, bench-scale investigations, and process engineering. Final report, February 1977-December 31, 1981

Description: The sulfur-iodine water-splitting cycle is characterized by the following three reactions: 2H/sub 2/O + SO/sub 2/ + I/sub 2/ ..-->.. H/sub 2/SO/sub 4/ + 2HI; H/sub 2/SO/sub 4/ ..-->.. H/sub 2/O + SO/sub 2/ + 1/2 O/sub 2/; and 2HI ..-->.. H/sub 2/ + I/sub 2/. This cycle was developed at General Atomic after several critical features in the above reactions were discovered. These involved phase separations, catalytic reactions, etc. Estimates of the energy efficiency of this economically reasonabl… more
Date: May 1, 1982
Creator: Norman, J.H.; Besenbruch, G.E.; Brown, L.C.; O'Keefe, D.R. & Allen, C.L.
Partner: UNT Libraries Government Documents Department
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Thermochemical water-splitting cycle, bench-scale investigations and process engineering. Annual report, October 1, 1978-September 30, 1979

Description: 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.
Partner: UNT Libraries Government Documents Department
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Texasgulf solar cogeneration program. Mid-term topical report

Description: The status of technical activities of the Texasgulf Solar Cogeneration Program at the Comanche Creek Sulfur Mine is described. The program efforts reported focus on preparation of a system specification, selection of a site-specific configuration, conceptual design, and facility performance. Trade-off studies performed to select the site-specific cogeneration facility configuration that would be the basis for the conceptual design efforts are described. Study areas included solar system size, t… more
Date: February 1, 1981
Partner: UNT Libraries Government Documents Department
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Coal derived fuel gases for molten carbonate fuel cells

Description: 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
Partner: UNT Libraries Government Documents Department
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Progress report, April 1, 1981 to March 31, 1982

Description: Our experiments on chemical reactions might be described by a laser specialist as pump and probe experiments. The pump process is a photodissociation and the probe process is a laser induced fluorescence (LIF). Both these processes would be somewhat limited if they were confined to one photon excitations. For example, to probe vibrationally and rotationally excited CO molecules one can conveniently use Bernheim's technique of exciting the A'..pi.. reverse arrow X'..sigma.. transition in CO by a… more
Date: January 1, 1982
Partner: UNT Libraries Government Documents Department
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Personnel dosimetry intercomparison studies at the ORNL Health Physics Research Reactor

Description: 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.
Partner: UNT Libraries Government Documents Department
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Effects of process severity on physiochemical properties of preasphaltenes

Description: This paper describes the physical character and reactions of preasphaltenes made from a bituminous coal. The preasphaltenes were obtained by reacting Illinois No. 6 Burning Star coal in contact with SRC-II heavy distillate under hydrogen pressure in an Autoclave for various times (10 to 30 minutes) and temperatures (350 to 450/sup 0/C). The preasphaltenes were separated by using conventional Soxhlet extraction techniques. The primary question addressed was: Are preashaltenes produced under one … more
Date: January 1, 1982
Creator: Lynch, A. W. & Thomas, M. G.
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

Description: 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.
Partner: UNT Libraries Government Documents Department
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Sludge application program at the Savannah River Plant

Description: 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.
Partner: UNT Libraries Government Documents Department
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Industrial recovery capability. Final report. [Claus alumina catalyst for sulfur production]

Description: This report provides an evaluation of the vulnerability - to a nuclear strike, terrorist attack, or natural disaster - of our national capacity to produce chlorine, beryllium, and a particular specialty alumina catalyst required for the production of sulfur. All of these industries are of critical importance to the United States economy. Other industries that were examined and found not to be particularly vulnerable are medicinal drugs and silicon wafers for electronics. Thus, only the three mo… more
Date: December 1, 1984
Creator: Gregg, D.W.
Partner: UNT Libraries Government Documents Department
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Direct chlorination process for geothermal power plant off-gas - hydrogen sulfide abatement

Description: The Direct Chlorination Process removes hydrogen sulfide from geothermal off-gases by reacting hydrogen sulfide with chlorine in the gas phase. Hydrogen chloride and elemental sulfur are formed by this reaction. The Direct Chlorination Process has been successfully demonstrated by an on-site operation of a pilot plant at the 3 M We HPG-A geothermal power plant in the Puna District on the island of Hawaii. Over 99.5 percent hydrogen sulfide removal was achieved in a single reaction stage. Chlori… more
Date: June 1, 1983
Creator: Sims, A.V.
Partner: UNT Libraries Government Documents Department
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Hydrogen production by the GA sulfur-iodine process: a progress report

Description: 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.
Partner: UNT Libraries Government Documents Department
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Method of recovery of alkali-metal constituents from coal-conversion residues. [Patent application]

Description: 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
Partner: UNT Libraries Government Documents Department
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