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The Natural Abundance of 13C and 18O, and the Alteration of Isotopic Abundances in the Equilibrium Between Hydrocyanic and Acetic Acids in Solution

Description: The 13C is enriched by approximately 0.2% in the liquid phase. This indicates that the hydrocyanic acid dissolved in the glacial acid can be only slightly dissociated.
Date: unknown
Creator: Becker, Erwin Willy & Vogell, Wolrad
Partner: UNT Libraries Government Documents Department
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Fumigation of Ornamental Greenhouse Plants with Hydrocyanic-Acid Gas

Description: "By the careful use of hydrocyanic-acid gas in accordance with the directions given in this bulletin practically all insects infesting the foliage of ornamental plants in greenhouses may be controlled, and more cheaply and effectively than by any other means." -- p. 2. Discusses methods for fumigation, chemical mixtures, ventilation, costs, and greenhouses in general. Includes a guide to greenhouse fumigation.
Date: 1917
Creator: Sasscer, E. R. (Ernest Ralph), b. 1883 & Borden, Arthur D. (Arthur Dickie), b. 1887
Partner: UNT Libraries Government Documents Department
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Hydrocyanic-Acid Gas Against Household Insects

Description: "The purpose of this bulletin is to enable the reader to use hydrocyanic-acid gas safely and effectively as a means of destroying the various insect pests of the household, such as bedbugs, fleas, cockroaches, ants, clothes moths, and carpet beetles." -- title page
Date: 1916
Creator: Howard, L. O. (Leland Ossian), 1857-1950 & Popenoe, C. H.
Partner: UNT Libraries Government Documents Department
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Theoretical studies of potential energy surfaces

Description: MRCI (configuration interaction) calculations were used to examine possible pathways for the O{sub 2} + CCH reaction. The H{sub 2} + CN potential surface was examined. An initial survey was made of the HCl + CN potential energy surface at a low level of theory.
Date: July 1, 1995
Creator: Harding, L. B.
Partner: UNT Libraries Government Documents Department
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Investigation of the rank dependence of tar evolution. Quarterly report, 1 July 1990--30 September 1990

Description: Despite its high nitrogen concentration levels relative to the parent coal samples, 7.2% vs. 1.4 - 2.0%, little volatile nitrogen evolution is observed until decomposition temperatures of 600{degree}C or greater are obtained. Due to the lack of decomposition via tar evolution and as contrasted to parent coals, no significant bound nitrogen is evolved with heavy hydrocarbons at particle temperatures less than 600{degree}C. Similar to ``virgin`` chars and tars formed during rapid devolatilization… more
Date: December 31, 1990
Creator: Freihaut, J. D. & Proscia, W. M.
Partner: UNT Libraries Government Documents Department
open access

Plasma-Catalysis During Temperature Transient Testing

Description: A combination of catalysts is used together with nonthermal plasma in simulated diesel exhaust, while the gas temperature is varied. The catalysts both store and convert pollutants. As a result, pollutant concentrations during temperature ramps are different than those at steady state conditions. The data are presented for plasma followed by BaY, alumina, and Pt catalysts in simulated exhaust. When temperature ramps from high to low, apparent NOx conversion is quite high. However, when temperat… more
Date: August 5, 2001
Creator: Hoard, John
Partner: UNT Libraries Government Documents Department
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Treatment of Cyanide Solutions and Slurries Using Air-Sparged Hydrocyclone (Ash) Technology

Description: The two-year Department of Energy (DOE) project ''Treatment of Cyanide Solutions and Slurries Using Air-Sparged Hydrocyclone (ASH) Technology'' (ASH/CN) has been completed. This project was also sponsored by industrial partners, ZPM Inc., Elbow Creek Engineering, Solvay Minerals, EIMCO-Baker Process, Newmont Mining Corporation, Cherokee Chemical Co., Placer Dome Inc., Earthworks Technology, Dawson Laboratories and Kennecott Minerals. Development of a new technology using the air-sparged hydrocy… more
Date: March 31, 2003
Creator: Miller, Jan D.; Chatwin, Terrence; Hupka, Jan; Halbe, Doug; Jiang, Tao; Dabrowski, Bartosz et al.
Partner: UNT Libraries Government Documents Department
open access

Pyrolysis and Combustion of Acetonitrile (CH{sub 3}CN)

Description: Acetonitrile (CH{sub 3}CN) is formed from the thermal decomposition of a variety of cyclic, noncyclic, and polymeric nitrogen-containing compounds such as pyrrole and polyacrylonitrile. The pyrolysis and combustion of acetonitrile have been studied over the past 30 years to gain a more detailed understanding of the complex mechanisms involved in the release of nitrogen-containing compounds such as hydrogen cyanide (HCN) in fires and nitrogen oxides (NOx) in coal combustion. This report reviews … more
Date: May 22, 2002
Creator: Britt, P. F.
Partner: UNT Libraries Government Documents Department
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Some chemical kinetics issues in reburning: The branching fraction of the HCCO + NO Reaction

Description: The authors have determined theoretically some critical kinetic parameters in the mechanism of NOx reburning under flow-reactor conditions. Specifically, using a variety of electronic structure methods to investigate the potential energy surfaces and the maximum free energy method of Quack and Troe to determine the resulting rate coefficients, they have deduced the values of k{sub 2} and k{sub 3} for the reactions, HCNO+O {leftrightarrow} HCO+NO (R2) and HCNO + OH {leftrightarrow} HCOH + NO, (R… more
Date: March 1, 1998
Creator: Miller, J. A.; Durant, J. L. & Glarborg, P.
Partner: UNT Libraries Government Documents Department
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Time-Resolved Infrared Absorption Studies Applied to the Study of Radical Plus Molecule Reactions

Description: Reaction of the cyano radical (CN) with ethane (C{sub 2}H{sub 6}) was studied using time resolved infrared absorption to monitor the product hydrogen cyanide (HCN) in individual to-vibrational states. Pulse laser photolysis was used to provide an initial excess of the CN radical and the time dependence of individual ro-vibrational states of the high frequency anti-symmetric stretching mode of HCN (0,0,v{sub 3}) was followed. These experiments reveal that the initial product state distribution o… more
Date: February 1, 1994
Creator: Bethardy, G. A.; Macdonald, R. G. & Northrup, F. J.
Partner: UNT Libraries Government Documents Department
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Nitric oxide reburning with methane

Description: This paper deals with initial findings from the ongoing, three-year DOE program that began on 02/01/1995. The program involves computer simulation studies to aid in planning and conducting a series of experiments that will extend the knowledge of reburning process. The objective of this work is to find nitric oxide reduction effectiveness for various reburning fuels and identify both homogeneous and heterogeneous reaction mechanisms characterizing NO reduction.
Date: December 31, 1996
Creator: Kumpaty, S. K. & Subramanian, K.
Partner: UNT Libraries Government Documents Department
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Effect of acetylene and ammonia as reburn fuel additions to methane in nitric oxide reburning

Description: Presented in this paper are the computational results of NO reburning with (a) a combination of methane and acetylene and (b) a combination of methane and ammonia. An updated reaction mechanism that was more comprehensive in terms of predicting the ammonia and isocyanic acid oxidation chemistry was employed to run the CKINTERP program. Using the binary file created by executing the above program and the input stoichiometric ratio conditions, the CHEMKIN package predicted the exit concentrations… more
Date: December 31, 1996
Creator: Kumpaty, S. K.; Nokku, V. P. & Subramanian, K.
Partner: UNT Libraries Government Documents Department
open access

Moving granular-bed filter for multi-contaminant control

Description: In addition to the control of ash particulates, a moving granular-bed filter can control other contaminants found in high-temperature, high-pressure coal gas streams through the use of chemically-reactive filter media. Under sponsorship of the U.S. Department of Energy, a laboratory test program is underway to evaluate the following three types of chemically-reactive filter media: a clay-based filter medium for the control of alkali and heavy metals in either reducing or oxidizing environments,… more
Date: December 1, 1995
Creator: McDaniel, H. M.; Haas, J. C.; Wilson, K. B. & Gupta, R. P.
Partner: UNT Libraries Government Documents Department
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Computational modeling and experimental studies on NO{sub x} reduction under pulverized coal combustion conditions. Technical progress report, second quarter, April 1, 1995--June 30, 1995

Description: Presented in this second quarterly report are the computational results of NO reburning with (a) a combination of methane and acetylene (i) with the reaction mechanism listed in the first quarterly report and (ii) with the updated reaction mechanism (Table 1 of this report); and (b) a combination of methane and ammonia. The impact of the updated reaction scheme was not significant on the results of NO reburning with methane/acetylene; however, the reaction scheme needed changes to improve the a… more
Date: December 1, 1995
Creator: Kumpaty, S. K.
Partner: UNT Libraries Government Documents Department
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Far infrared chemical lasers. Technical progress report No. 3, August 1, 1976--July 31, 1977. [HCN]

Description: Laser oscillation at 337 and 311 ..mu..m has been obtained from HCN molecules prepared in vibrationally excited states by the reaction between cyanogen radicals and hydrogen molecules. It has likewise been observed in HCN raised to an electronically excited state by flash photolysis. The characteristics of the pulsed output are quite different in the two cases and beginnings have been made on experiments to probe the pumping and energy transfer kinetics. The rate determining step is not the rea… more
Date: August 1, 1977
Creator: Robinson, D. W.
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Canister]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: February 23, 1979, 12:00 p.m.
Duration: 2 minutes 08 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
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Solvent Fire by-Products

Description: Southwest Research Institute (SwRI) conducted a burn test of the Caustic-Side Solvent Extraction (CSSX) solvent to determine the combustion products. The testing showed hydrogen fluoride gas is not a combustion product from a solvent fire when up to 70% of the solvent is consumed. The absence of HF in the combustion gases may reflect concentration of the modifier containing the fluoride groups in the unburned portion. SwRI reported results for other gases (CO, HCN, NOx, formaldehyde, and hydroc… more
Date: May 22, 2006
Creator: Walker, D. & Samuel Fink, S.
Partner: UNT Libraries Government Documents Department
open access

Vapor space characterization of waste Tank 241-BY-104 (in situ): Results from samples collected on 4/22/94

Description: This report describes inorganic and organic analyses results from in situ samples obtained from the space of the Hanford waste storage Tank 241-BY-104 (referred to as Tank BY-104). The results described here were obtained to support safety and toxicological evaluations. A summary of the results for inorganic and organic analytes is listed in Table 1. Detailed descriptions of the results appear in the text. Quantitative results were obtained for the inorganic compounds NH{sub 3}, NO{sub 2}, NO, … more
Date: October 1, 1995
Creator: Pool, K. H.; Ligotke, M. W.; Clauss, T. W.; Lucke, R. B.; McVeety, B. D.; Sharma, A. K. et al.
Partner: UNT Libraries Government Documents Department
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Far infrared chemical lasers. Technical progress report No. 2, August 1, 1975--July 31, 1976

Description: A pumping mechanism has been found for the CO/sub 2/ gas laser which involves the transfer of electronic energy from O/sub 2/ (/sup 1/..sigma..g/sup +/) to CO/sub 2/, the oxygen dropping to the /sup 1/DELTA g state. This appears to pump vibrational states of CO/sub 2/ which are above the lasing state (001), and which most deactivate collisionally to (001) before the emission pulse. A pure rotational, diatonic OH laser has been discovered which is collisionally pumped from excited vibrational le… more
Date: August 1, 1976
Creator: Robinson, D. W.
Partner: UNT Libraries Government Documents Department
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Nitrogen oxide abatement by distributed fuel addition. Quarterly report No. 11, February 1, 1990--April 30, 1990

Description: The formation and destruction of nitrogenous species in the fuel rich coal post flame of a laboratory coal combustor were explored. The fuel rich zones in reburning and air staging configurations were compared under a variety of conditions. The objective was to determine the relative significance of homogeneous and heterogeneous sources of HCN formation and to extract models that can predict nitrogenous species profiles in fuel rich zones. Heterogeneous effects on HCN formation due to the slow … more
Date: August 27, 1990
Creator: Wendt, J. O. L. & Mereb, J. B.
Partner: UNT Libraries Government Documents Department
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