Kinetics of CO hydrogenation over coprecipitated cobalt-alumina

The kinetics of CO hydrogenation over coprecipitated 36 wt% Co/Al2O3 was studied in a fixed‐bed microreactor at atmospheric pressure. Intrinsic kinetic data were obtained in the initial rate region using four different CO concentrations and two different H2/CO ratios over the 473–523 K temperature r...

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Bibliographic Details
Published in:Journal of chemical technology and biotechnology (1986) 1997-11, Vol.70 (3), p.304-310
Main Authors: AKIN, A. N, ÖNSAN, Z. I
Format: Article
Language:English
Subjects:
Catalysis
Catalytic reactions
Chemistry
CO hydrogenation
cobalt-alumina
coprecipitation
Exact sciences and technology
General and physical chemistry
intrinsic kinetics
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:The kinetics of CO hydrogenation over coprecipitated 36 wt% Co/Al2O3 was studied in a fixed‐bed microreactor at atmospheric pressure. Intrinsic kinetic data were obtained in the initial rate region using four different CO concentrations and two different H2/CO ratios over the 473–523 K temperature range. The surface carbide mechanism with dissociative adsorption of hydrogen as the rate controlling step gives the most plausible kinetic model among the eight different models tested. C1–C4 production rates are found to be strongly influenced by temperature, and optimum C1–C4 hydrocarbon selectivity is obtained at 508 K. The activation energy for CO consumption and CH4 formation are calculated as 74±2 kJ mol−1 and 84±2 kJ mol−1 respectively. ©1997 SCI
ISSN:0268-2575
1097-4660
DOI:10.1002/(SICI)1097-4660(199711)70:3<304::AID-JCTB766>3.0.CO;2-D