C-5 alkene hydrogenation: Effect of competitive reactions on activity and selectivity

Canning, A. S., Jackson, S. D., Monaghan, A. and Wright, T. (2006) C-5 alkene hydrogenation: Effect of competitive reactions on activity and selectivity. Catalysis Today, 116(1), pp. 22-29. (doi: 10.1016/j.cattod.2006.04.002)

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Publisher's URL: http://dx.doi.org/10.1016/j.cattod.2006.04.002


The hydrogenation of 1-pentene, cis-2-pentene and trans-2-pentene was studied over a 1% Pd/alumina catalyst. The rate of hydrogenation was cis-2-pentene > 1-pentene > trans-2-pentene. As the system moved towards thermodynamic equilibrium in pentene isomers the rate constant changed to that of the trans-isomer in a competitive environment. In competitive hydrogenation between the alkenes the hydrogenation rate of 1-pentene and trans-2-pentene are enhanced while that of cis-2-pentene is decreased. In a competitive system between alkene and alkyne, the rate of 1-pentene hydrogenation is increased 20-fold, even after all the pentyne is reacted. Enhanced hydrogen transfer through a modified hydrocarbonaceous deposit is believed to be the cause. The results also support the concept of separate sites for alkyne and alkene in a competitive environment.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Jackson, Professor David
Authors: Canning, A. S., Jackson, S. D., Monaghan, A., and Wright, T.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Catalysis Today
Published Online:05 May 2006

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
298521Advanced Technology in Catalytic Chemistry and Engineering for Novel Applications (ATHENA)Samuel JacksonEngineering & Physical Sciences Research Council (EPSRC)GR/R50899/01Chemistry