DEACTIVATION AND SELECTIVITY PATTERN IN CROTONALDEHYDE HYDROGENATION

Gas phase hydrogenation of crotonaldehyde to crotyl alcohol, butyralde hyde, and butanol was studied in a differential microreactor at atmosp heric pressure and 353 K over a supported Pt catalyst. The reaction ra te was seen to be dependent on the catalyst pre-treatment mode. Rapid deactivation has been observed and the deactivation rate differed for differently treated samples. Kinetic modelling was based upon reaction a network, which apart from conventional dehydration steps included p arallel hydrogenolysis to hydrocarbons. Deactivation phenomena were as sumed to occur as a result of the formation of surface deposits, which block active catalyst sites. An adequate description of experimental data has been achieved via parameter estimation.