INTERACTIONS OF REACTANTS IN HYDRATION OF ACETYLENE ON CD-ZEOLITE CATALYSTS

IR measurements were carried out with Cd-MFI and Cd-clinoptilolite at 25 degrees C. Samples of different water content were contacted with a cetylene at different pressures. Adsorbed acetaldehyde was formed from acetylene and water both adsorbed on similar Cd(2+)Z(2)(-) sites. The reaction between the two adsorbed reactants reveals the validity of L angmuir-Hinshelwood kinetics. Decrease of water content or increase of acetylene pressure facilitated the formation of carbonaceous deposits especially in the case of Cd-MFI. Deposits formed from acetylene disp lace adsorbed acetylene and acetaldehyde.