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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
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
Partner: UNT Libraries Government Documents Department
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Auger and Reaction Studies of Poisoning by Sulfur and Regeneration of Metal Synthesis Gas Catalysts. Progress Report: April 1, 1975--December 15, 1975

Description: The objective is to determine the rate and mechanism of (1) sulfur poisoning and (2) of regeneration of metal catalysts used in synthesis gas conversion to hydrocarbon products. Auger electron spectroscopy (AES) is used for surface analysis, and in-situ reaction studies of deactivation and regeneration are combined with microreactor studies to quantify sulfur poisoning. An all-glass internal recirculation microreactor has been designed, fabricated, debugged and integrated into a metal-free feed… more
Date: December 1975
Creator: Katzer, James R.
Partner: UNT Libraries Government Documents Department
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Auger and Reaction Studies of Poisoning by Sulfur and Regeneration of Metal Synthesis Gas Catalysts. Progress Report, December 8, 1975--December 8, 1976

Description: CO methanantion rates have been measured in the all-glass internal recycle reactor developed for this work. The methanation rate over the cylinder Ni film catalyst at 400/sup 0/C is 3.9 sec/sup -1/ initially, and the catalyst undergoes deactivation to a value of 1.8 sec/sup -1/, comparable with a reported value of 2.5 sec/sup -1/. The activation energy for Ni film on alumina is 24 kcal/mole, that for Ni film on silica is 17.8 kcal/mole comparable to values for Ni on these supports. The kinetics… more
Date: December 10, 1976
Creator: Katzer, James R.
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.
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.
Partner: UNT Libraries Government Documents Department
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