Infrared Spectroscopic Studies of the Adsorption and Reaction of 3-Methyl-2-butenal over Alkali-Promoted Ru/SiO2 Catalysts

Article abstract of DOI:10.1021/j100124a036

Flow reaction studies of the hydrogenation of 3-methyl-2-butenal over Ru/SiO2 and potassium-promoted Ru/SiO2 were combined with in situ infrared spectroscopic monitoring of its adsorption and reaction as well as the adsorption of its reaction products.The presence of the alkali promoter significantly inhibited this hydrogenation to form the saturated aldehyde, a reaction which was followed by decarbonylation of the saturated aldehyde in a reverse migratory insertion process.The initial formation of adsorbed CO and hydrocarbon products from the saturated aldehyde may ultimately be responsible for the product distribution observed under steady-state reaction conditions.