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Development of Unique Catalysts for Hydrodenitrogenation of Coal-Derived Liquids. Annual Report, September 15, 1978-September 14, 1979

Description: Preliminary results from decahydroquinoline hydrodenitrogenation runs show that Bronsted acidity by itself will not catalyze carbon-nitrogen bond scission. The C-N bond cleavage must therefore be catalyzed by an active site, which consists of a transition metal ion in close proximity to an acid site. It appears that hydrodenitrogenation requires both an acidic and a basic site for the Hoffman E/sub 2/ elimination reaction to occur. Several catalysts have been prepared and tested, including Bron… more
Date: October 1, 1980
Creator: Katzer, James R.; Stiles, Alvin B. & Kwart, Harold
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of Unique Catalysts for Hydrodenitrogenation of Coal-Derived Liquids. Annual Report, September 15, 1979-September 15, 1980

Description: Hydrodenitrogenation of quinoline and decahydroquinoline has been studied employing several catalysts: Bronsted and Lewis acid catalysts without metal, and silica-alumina, ..gamma..-alumina and magnesia impregnated with molybdenum, tungsten, nickel or cobalt. Our results show that nitrogen removal rate was highest for molybdenum on alumina and tungsten on silica-alumina or alumina catalysts. Nitrogen abstraction using ..gamma..-alumina support is considerably faster than with magnesia support. … more
Date: December 15, 1980
Creator: Katzer, James R.; Stiles, Alvin B. & Kwart, Harold
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. Twelfth quarterly report, March 21-June 20, 1978

Description: All the data reported previously have been reevaluated to determine the quantitative reaction network for dibenzothiophene hydrodesulfurization at about 100 atm and 300/sup 0/C. This network shows the high selectivity of the catalyst for simple hydrodesulfurization (biphenyl + H/sub 2/S formation). When methyl groups are present in the 4 and 6 positions of dibenzothiophene, the primary hydrogenation reaction is approximately as fast as the primary hydrodesulfurization reaction. Ni and Mo or Ni … more
Date: October 20, 1978
Creator: Gates, Bruce C.; Katzer, James R.; Olson, Jon H.; Kwart, Harold & Stiles, Alvin B.
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. Ninth quarterly report, June 21, 1977--September 20, 1977

Description: Flow reactor studies of HDS of dibenzothiophene at about 300/sup 0/C and 100 atm have shown a new dependence of catalyst activity on H/sub 2/S concentration at low values. We infer that the catalyst undergoes structural changes during reaction, sometimes becoming sulfur deficient and relatively inactive. It is evidently necessary to maintain the catalyst in a properly sulfided state during reactor startup and operation by avoiding its contacting too little H/sub 2/S. The relative activities of … more
Date: May 1, 1978
Creator: Gates, Bruce C.; Katzer, James R.; Olson, Jon H.; Kwart, Harold & Stiles, Alvin B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Kinetics and Mechanism of Catalytic Hydroprocessing of Components of Coal-Derived Liquids. Sixteenth Quarterly Report, February 16, 1983-May 15, 1983.

Description: A new method of structural analysis is applied to a group of hydroliquefied coal samples. The method uses elemental analysis and NMR data to estimate the concentrations of functional groups in the samples. The samples include oil and asphaltene fractions obtained in a series of hydroliquefaction experiments, and a set of 9 fractions separated from a coal-derived oil. The structural characterization of these samples demonstrates that estimates of functional group concentrations can be used to pr… more
Date: August 22, 1983
Creator: Gates, Bruce C.; Olson, Jon H.; Schuit, G. C. A.; Stiles, Alvin B. & Petrakis, Leon
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Kinetics and mechanism of catalytic hydroprocessing of components of coal-derived liquids. Twentieth quarterly report, February 16, 1984-May 15, 1984

Description: Kinetics data have been determined for the catalytic hydroprocessing of the acidic fractions of a heavy distillate of a liquid derived from Powhatan No. 5 coal. A commercial, sulfided Ni-Mo/..gamma..-Al/sub 2/O/sub 3/ catalyst was used in the experiments, carried out at 350/sup 0/C and 120 atm with the coal liquid fractions dissolved in cyclohexane. The feed and hydrotreated products were analyzed by gas chromatography/mass spectrometry. The data were analyzed with group-type methods for compou… more
Date: June 26, 1984
Creator: Gates, Bruce C.; Olson, Jon H.; Schuit, G. C. A.; Stiles, Alvin B. & Petrakis, Leon
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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