Catalytic Deactivation of HY Zeolites in the Dehydration of Glycerol to Acrolein

The study of the deactivation HY zeolites in dehydration reaction glycerol to acrolein has represented a challenge for design new catalysts. with SiO2/Al2O3 molar ratios between 3.5 and 80 were studied. solids characterized by XRD, N2 physisorption, SEM-EDXS, Raman UV-vis spectroscopies, infrared spectroscopy pyridine (FTIR-Py) catalytic activity tests from 250 °C 325 °C. It was found that total amount acid sites per unit area catalyst decreased as ratio increased 80, resulting decrease initial conversion. selectivity promoted increase Brønsted/Lewis at any temperature. showed lifetime depended on pore structure, improving presence large surface areas evidenced rate constants. characterization deactivated catalysts physisorption thermogravimetric analysis indicated deposition coke resulted obstruction micropores partial blockage mesopores. Moreover, mesopores allowed deposited be reduced.