Evaluation of Catalytic Performance of Hierarchical Zeolites in Friedel‐Crafts Fixed‐bed Alkylation

Abstract

AbstractFriedel‐Crafts alkylation is one of the most important catalytic reactions in organic chemistry. Recently, hierarchical zeolites have exhibited superior catalytic performance in such liquid‐phase batch reactions. However, for practical application, it is of significance to evaluate their catalytic performance in Friedel‐Crafts fixed‐bed alkylation. In this work, we prepare hierarchical zeolites by post‐treatment, of which the structures are confirmed by XRD patterns and N2 adsorption‐ desorption tests. Then, a fixed‐bed reactor is employed to investigate their catalytic performance in series of benzylation reactions. The results indicate that hierarchical zeolites have superior anti‐deactivation ability in the benzylation reactions, especially when react with p‐xylene or mesitylene, the BA conversion maintained nearly 100 % in 300 min, much better than that of micropore zeolites. These results suggest that hierarchical zeolites have a potential industrial application for Friedel‐Crafts fixed‐bed alkylation than conventional zeolites.