Synthesis, characterization of hierarchical ZSM-5 zeolite catalyst and its catalytic performance for phenol tert-butylation reaction

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• 作者：Ling Xu ; Shujie Wu ; Jingqi Guan ; Hongsu Wang ; Yuanyuan Ma ; Ke Song ; Haiyan Xu ; Haijun Xing ; Chen Xu ; Zhuqian Wang ; Qiubin Kan
• 关键词：Hierarchical ZSM-5 zeolite ; Alkylation ; Phenol ; tert-Butyl alcohol
• 刊名：Catalysis Communications
• 出版年：2008
• 出版时间：31 March 2008
• 年：2008
• 卷：9
• 期：6
• 页码：1272-1276
• 全文大小：318 K

文摘

A hierarchical ZSM-5 zeolite was prepared under hydrothermal conditions through polystyrene (PS) colloidal spheres and tetrapropylammonium hydroxide (TPAOH) dual templates method. The physical and acid properties of the hierarchical ZSM-5 zeolite were characterized by XRD, SEM, N₂ adsorption, ²⁷Al-MAS NMR and NH₃-TPD techniques. Catalytic tests show that the hierarchical ZSM-5 zeolite catalyst exhibits high catalytic activity for alkylation of phenol with tert-butanol. The high phenol conversion and 2,4-di-TBP selectivity are mainly assigned to the presence of the hierarchical porosity and strong acidity of the pore walls. The macropores offer easier transport and access to the active sites and the macroporous walls built by nano-ZSM-5 crystals provide the acidic sites for reaction.