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in subjects: "Chemical Reaction Kinetics"  
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Kinetics of the radiation-induced exchange reactions of H/sub 2/, D/sub 2/, and T/sub 2/: a review

Description: Mixtures of H/sub 2/--T/sub 2/ or D/sub 2/--T/sub 2/ will exchange to produce HT or DT due to catalysis by the tritium ..beta.. particle. The kinetics of the reaction D/sub 2/ + T/sub 2/ = 2DT may play an important role in designing liquid or solid targets of D/sub 2/--DT--T/sub 2/ for implosion fusion, and distillation schemes for tritium cleanup systems in fusion reactors. Accordingly, we have critically reviewed the literature for information on the kinetics and mechanism of radiation-induce… more
Date: January 6, 1978
Creator: Pyper, J.W. & Briggs, C.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The development of precipitated iron catalysts with improved stability

Description: The objective of this program is to identify the chemical principles governing the deactivation of precipitated iron catalysts during Fischer-Tropsch synthesis and to use these chemical principles in the design of catalysts suitable for slurry reactors. The performance targets are 88% CO+H{sub 2} conversion with less than 1% deactivation/day for 1 month and a methane and ethane selectivity of no more than 7% (based on hydrocarbons and oxygenates only) at a space velocity of at least 2 normal li… more
Date: May 6, 1992
Creator: Abrevaya, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The effect of chemical additives on the synthesis of ethanol

Description: The objective of this research was to investigate the reaction mechanism of higher alcohol and aldehyde synthesis from syngas and the role of additives in the synthesis. An in situ IR reaction system and probe molecule technique were developed to study adsorbed species, active sites, and reaction pathway during reaction. The catalysts used for this study included silica-supported Rh, Ru, and Ni. (VC)
Date: March 6, 1992
Creator: Chuang, S.S.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Review of thermodynamic and kinetic data for the molten-tin process

Description: This report gives a brief description of the Molten Tin Process for nuclear fuel reprocessing, and summarizes the available data on thermodynamics and kinetics that pertain to the process. The two main reactions of concern in the process are illustrated by: MO/sub 2/(s) + 2C(in Sn sol'n) ..-->.. M(in Sn sol'n) + 2CO(g), and M(in Sn sol'n) + 1/2 N/sub 2/(g) ..-->.. MN(s), where M represents U or some other element in an oxide fuel. It is especially important for the Molten Tin Process to have in… more
Date: August 6, 1979
Creator: Krikorian, O.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The development of precipitated iron catalysts with improved stability. Technical progress report No. 10, December 16, 1989--April 31, 1990

Description: The objective of this program is to identify the chemical principles governing the deactivation of precipitated iron catalysts during Fischer-Tropsch synthesis and to use these chemical principles in the design of catalysts suitable for slurry reactors. The performance targets are 88% CO+H{sub 2} conversion with less than 1% deactivation/day for 1 month and a methane and ethane selectivity of no more than 7% (based on hydrocarbons and oxygenates only) at a space velocity of at least 2 normal li… more
Date: May 6, 1992
Creator: Abrevaya, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Effect of Chemical Additives on the Synthesis of Ethanol. Final Technical Report, September 15, 1987--March 15, 1992

Description: The objective of this research was to investigate the reaction mechanism of higher alcohol and aldehyde synthesis from syngas and the role of additives in the synthesis. An in situ IR reaction system and probe molecule technique were developed to study adsorbed species, active sites, and reaction pathway during reaction. The catalysts used for this study included silica-supported Rh, Ru, and Ni. (VC)
Date: March 6, 1992
Creator: Chuang, S. S. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Molten iron oxysulfide as a superior sulfur sorbent. Technical progress report, September 1, 1989--March 1, 1990

Description: Slagging combustors with injected lime or limestone are being considered as replacements for conventional coal burners. They have advantages in that they can be stages to reduce NO{sub x} and SO{sub x} emissions. Iron oxide, as an alternative to lime or-limestone may be effective not only as a desulfurizing agent, but, under the right conditions of oxygen potential, it can act as a flux to produce a glassy slag This glassy slag should be dense and environmentally inert. In this reporting period… more
Date: March 6, 1990
Creator: Hepworth, M. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Steam gasification of carbon: Catalyst properties, March 15, 1992--June 14, 1992

Description: This research uses several techniques to measure the concentration of catalyst sites and determine their stoichiometry for the catalyzed gasification of carbon. Both alkali and alkaline earth oxides are effective catalysts for accelerating the gasification rate of coal chars, but only a fraction of the catalyst appears to be in a form that is effective for gasification, and the composition of that catalyst is not established. Transient techniques, with {sup 13}C labeling, are being used to stud… more
Date: July 6, 1992
Creator: Falconer, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Simultaneous reactions at disk and porous electrodes

Description: Advances in electrochemical engineering are reviewed and the methodology of analysis of electrochemical systems outlined. Examples illustrative of current research concern simultaneous reactions for flow-through porous electrodes and the more fundamental system of a rotating-disk electrode. Here the undesirable side reaction is the formation of dissolved hydrogen, and the main reaction is the deposition of copper from sulfuric acid solutions. Distributions of reaction rate, concentration, and p… more
Date: September 6, 1976
Creator: Newman, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Steam gasification of carbon: Catalyst properties, March 15, 1992--June 14, 1992

Description: This research uses several techniques to measure the concentration of catalyst sites and determine their stoichiometry for the catalyzed gasification of carbon. Both alkali and alkaline earth oxides are effective catalysts for accelerating the gasification rate of coal chars, but only a fraction of the catalyst appears to be in a form that is effective for gasification, and the composition of that catalyst is not established. Transient techniques, with {sup 13}C labeling, are being used to stud… more
Date: July 6, 1992
Creator: Falconer, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Reactivity of Peroxynitrite: Implications for Hanford Waste Management and Remediation

Description: The purpose of this grant has been to provide basic chemical research in support of a major project undertaken at Brookhaven National Laboratory (BNL) whose purpose was to provide better understanding of the complex chemical processes occurring an nuclear storage tanks on the Hanford reservation. More specifically, the BNL grant was directed at evaluating the extend of radiation-induced formation of peroxynitrite anion (ONOO) in the tanks and its possible use in was incorporated as a subcontrac… more
Date: November 6, 2003
Creator: Hurst, James K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Kinetics and mechanism of desulfurization and denitrogenation of coal-derived liquids. Seventh quarterly report, December 21, 1976--March 20, 1977. [CoO--MoO3 and NiO--MoO3]

Description: Three high-pressure flow microreactors and two batch autoclave reactors have been used to study the reaction networks and kinetics of (1) catalytic hydrodesulfurization of dibenzothiophene and methyl-substituted dibenzothiophenes and (2) catalytic hydrodenitrogenation of acridine. The catalysts were commercial, sulfided CoO-MoO/sub 3//..gamma..-Al/sub 2/O/sub 3/ and commercial, sulfided NiO-MoO/sub 3//..gamma..-Al/sub 2/O/sub 3/. At 300/sup 0/C and 104 atm, dibenzothiophene reacts to give H/sub… more
Date: April 6, 1977
Creator: Gates, B. C.; Katzer, J. R.; Olson, J. H.; Kwart, H. & Stiles, A. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Catalyst and process development for synthesis gas conversion to isobutylene. Final report, September 1, 1990--January 31, 1994

Description: Previous work on isosynthesis (conversion of synthesis gas to isobutane and isobutylene) was performed at very low conversions or extreme process conditions. The objectives of this research were (1) determine the optimum process conditions for isosynthesis; (2) determine the optimum catalyst preparation method and catalyst composition/properties for isosynthesis; (3) determine the kinetics for the best catalyst; (4) develop reactor models for trickle bed, slurry, and fixed bed reactors; and (5)… more
Date: May 6, 1994
Creator: Anthony, R. G. & Akgerman, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

REDUCTION OF INHERENT MERCURY EMISSIONS IN PC COMBUSTION

Description: Mercury emission compliance presents one of the major potential challenges raised by the 1990 Clean Air Act Amendments. Simple ways of controlling emissions have not been identified. The variability in the field data suggest that inherent mercury emissions may be reduced if the source of this inherent capture can be identified and controlled. The key mechanisms appear to involve the oxidation of mercury to Hg{sup 2}, generally producing the more reactive HgCl{sub 2}, followed by its capture by … more
Date: August 6, 1999
Creator: Kramlich, John C.; Sliger, Rebecca N. & Going, David J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

REDUCTION OF INHERENT MERCURY EMISSIONS IN PC COMBUSTION

Description: Mercury emission compliance presents one of the major potential challenges raised by the 1990 Clean Air Act Amendments. Simple ways of controlling emissions have not been identified. The variability in the field data suggest that inherent mercury emissions may be reduced if the source of this inherent capture can be identified and controlled. The key mechanisms appear to involve the oxidation of mercury to Hg{sup 2}, generally producing the more reactive HgCl{sub 2}, followed by its capture by … more
Date: August 6, 1999
Creator: Kramlich, John C.; Sliger, Rebecca N. & Going, David J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Kinetic modeling of non-ideal explosives with CHEETAH

Description: We report an implementation of the Wood-Kirkwood kinetic detonation model based on multi-species equations of state and multiple reaction rate laws. Finite rate laws are used for the slowest chemical reactions. Other reactions are given infinite rates and are kept in constant thermodynamic equilibrium. We model a wide range of ideal and non-ideal composite energetic materials. We find that we can replicate experimental detonation velocities to within a few per cent, while obtaining good agreeme… more
Date: August 6, 1998
Creator: Fried, L E; Howard, W M & Souers, P C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Natural Analogues of Nuclear Waste Glass Corrosion.

Description: This report reviews and summarizes studies performed to characterize the products and processes involved in the corrosion of natural glasses. Studies are also reviewed and evaluated on how well the corrosion of natural glasses in natural environments serves as an analogue for the corrosion of high-level radioactive waste glasses in an engineered geologic disposal system. A wide range of natural and experimental corrosion studies has been performed on three major groups of natural glasses: tekti… more
Date: January 6, 1999
Creator: Abrajano, T. A., Jr.; Ebert, W. L. & Luo, J. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

REDUCTION OF INHERENT MERCURY EMISSIONS IN PC COMBUSTION

Description: Mercury emission compliance is one of the major potential challenges raised by the 1990 Clean Air Act Amendments. Simple ways of controlling emissions have not been identified. The variability in the field data suggests that inherent mercury emissions may be reduced if the source of this inherent capture can be identified and controlled. The key mechanisms appear to involve the oxidation of the mercury to Hg{sup 2}, generally producing the more reactive HgCl{sub 2} , followed by its capture by … more
Date: August 6, 1999
Creator: Kramlich, John C.; Sliger, Rebecca N. & Going, David J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Novel approaches to the production of higher alcohols from synthesis gas. Quarterly technical progress report number 13, 1 October--31 December 1993

Description: The mass balances from the September, 1993 methanol synthesis run closed to within {+-}5%, indicating that the analytical techniques and measurement procedures that have been developed to date are accurate and reliable. However, methanol production was severely depressed due to catalyst poisoning, probably by metal carbonyls. Thermodynamic calculations show that the current carbonyl traps are not suitable for methanol synthesis service. X-ray photoelectron spectroscopy analysis showed essential… more
Date: July 6, 1994
Creator: Roberts, G. W. & Kow. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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