Steric effects in the selective hydrogenation of cinnamaldehyde to cinnamyl alcohol using an Ir/C catalyst

John Breen, Robbie Burch, Javier Gomez-Lopez, K. Griffin, M. Hayes

Research output: Contribution to journalArticle

86 Citations (Scopus)

Abstract

The liquid phase selective hydrogenation of cinnamaldehyde to cinnamyl alcohol has been carried out over a graphite-supported iridium catalyst. The effect of reaction parameters such as temperature, pressure, concentration of reactant, the effect of addition of product to the feed and pre-reduction of the catalyst were studied. In situ pre-reduction of the catalyst with hydrogen had a very significant enhancing effect on the conversion of cinnamaldehyde and selectivity of the catalyst to cinnamyl alcohol. Kinetic analysis of the pre-reduced catalyst showed that the reaction is zero order with respect to cinnamaldehyde and first order with respect to hydrogen. The reaction follows an Arrhenius behaviour with an activation energy of 37 kJ mol(-1). Detailed analysis of the reaction showed that hydrogenation of the C=C double bond to give hydrocinnamaldehyde predominantly occurred at low conversions of cinnamaldehyde (
Original languageEnglish
Pages (from-to)267-274
Number of pages8
JournalAPPLIED CATALYSIS A-GENERAL
Volume268 (1-2)
Issue number1-2
DOIs
Publication statusPublished - 10 Aug 2004

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Fingerprint Dive into the research topics of 'Steric effects in the selective hydrogenation of cinnamaldehyde to cinnamyl alcohol using an Ir/C catalyst'. Together they form a unique fingerprint.

  • Cite this