Hydrogenation of alkenes over a cobalt-molybdenum-alumina catalyst

Journal Article · Tue Jul 01 00:00:00 EDT 1980 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(80)90487-X· OSTI ID:6891018

Uchytil, J; Jakubickova, E; Kraus, M

Twelve C/sub 2/ to C/sub 10/ alkenes have been hydrogenated on a reduced commerical cobalt-molybdenum-alumina catalyst at atmospheric pressure and 300/sup 0/C. Initial reaction rates have been measured with different feed compositions and correlated by a Langmuir-Hinshelwood type rate equation. The calculated adsorption coefficients of the alkenes had the same value whereas the rate constants spread over two orders of magnitude. The observed influence of the structure on rate have been correlated by the Taft equation for steric effects using the sum of constants E/sub s//sup 0/ for substituents in the half-hydrogenated state, R/sup 1/R/sup 2/R/sup 3/C-*. This and further evidence indicate that the addition of the second hydrogen is the rate-determining step. The results are compared with observations concerning hydrogenation on metals. The knowledge of structure influence on rate is used for critical examination of the kinetic equation.

• Research Organization: Czechoslovak Academy of Sciences, Prague
• OSTI ID: 6891018
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 64:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COBALT
DATA
ELEMENTS
EXPERIMENTAL DATA
HYDROCARBONS
HYDROGENATION
INFORMATION
KINETICS
METALS
MOLYBDENUM
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
REFRACTORY METALS
TRANSITION ELEMENTS