Acid Properties of MCM-36 Molecular Sieve and its Catalytic Behavior in Benzene Alkylation with Propylene
Pillared layered MCM-36 zeolite was synthesized from pure MCM-22 precursor with polymeric silica as pillaring agent. Characterization results of acidic properties from FT-IR indicate a decrease in the amounts of Lewis acidic and Brønsted acidic. The catalytic behavior of pillared layered MCM-36 zeolite in benzene alkylation with propylene was studied. It was found that pillared MCM-36 zeolite shows stable catalytic activity in a 200h time-on-stream measurement under a relatively high propylene velocity space. The excellent selectivity to cumene over MCM-36 should be mainly due to the decrease in the amount of Brønsted acidity, while the improvement of the catalytic activity of MCM-36 can be mainly assigned to the presence of a larger amount of structurally accessible acid sites caused by the increment of mesoporous volume in this material.
Z.S. Liu, L.P. Xu, X.D. Liang, Z.H. Wang and H.M. Zhang
F. Zhao et al., "Acid Properties of MCM-36 Molecular Sieve and its Catalytic Behavior in Benzene Alkylation with Propylene", Advanced Materials Research, Vol. 1015, pp. 434-437, 2014