Reaction kinetics of the hydrodenitrogenation of decahydroquinoline over NiMo(P)/Al{sub 2}O{sub 3} catalysts
- Swiss Federal Institute of Technology (ETH), Zurich (Switzerland)
The reaction mechanism and the kinetics of hydrodenitrogenation. (HDN) of decahydroquinoline (DHQ) over NiMo(P)/Al{sub 2}O{sub 3} catalysts were studied in the presence and absence of H{sub 2}S. Cis- and trans-propylcyclohexylamine were identified as the most important reaction intermediates; their reactivity was found to vary under different reaction conditions. The kinetic constants in the HDN network of DHQ were calculated assuming a Langmuir-Hinshelwood mechanism. It was found that, in the phosphorus-containing catalysts, the adsorption of DHQ was enhanced and the rate constant of the first C-N bond cleavage decreased. As a consequence, the overall HDN reaction rate of DHQ decreased when phosphorus was added to a NiMo/Al{sub 2}O{sub 3} catalyst. The effect of H{sub 2}S was the opposite of that of phosphorus: it increased the rate constants and decreased the adsorption constants. The inhibiting effect of DHQ on its own conversion was different from that on the hydrogenation of cyclohexene, proving that different catalytic sites are involved in these reactions.
- OSTI ID:
- 467968
- Report Number(s):
- CONF-960652-; TRN: 96:004817-0005
- Resource Relation:
- Conference: 11. international congress on catalysis (ICC-11), Baltimore, MD (United States), 30 Jun - 5 Jul 1996; Other Information: PBD: 1996; Related Information: Is Part Of 11th International congress on catalysis - 40th anniversary. Part A and B; Hightower, J.W.; Delgass, W.N.; Iglesia, E.; Bell, A.T. [eds.]; PB: 1482 p.
- Country of Publication:
- United States
- Language:
- English
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