纳米晶ZSM-5分子筛的制备及噻吩烷基化性能

Preparation of Nanocrystalline ZSM-5 Zeolite and Its Catalytic Performance for the Alkylation of Thiophene

采用水热合成法制备了纳米晶堆积多级结构ZSM-5分子筛,与传统相比,所需能量少.并通过XRD、SEM、BET和NH3-TPD表征方法对所得样品进行表征,考察不同模板剂用量对纳米晶堆积多级结构ZSM-5分子筛物化性质的影响.结果表明,当模板剂用量为 4 g时,催化剂的粒径为纳米级结构,表面积较大,介孔数量多,酸性适宜,应用到噻吩烷基化反应后,表现出较好的噻吩烷基化活性.

Nanocrystalline stacked multi-stage ZSM-5 molecular sieve was synthesized by hydrothermal synthesis.Compared with the tradition method,its water consumption is very small and energy requirement is less.The samples were characterized by XRD,SEM,BET and NH3-TPD methods.The effect of different templating agents on the physicochemical properties of nanocrystalline stacked multi-stage ZSM-5 molecular sieves was investigated.The results showed that when the amount of templating agent was 4 g,the particle size of the catalyst was nano-scale structure,the surface area was larger,the amount of mesopores was more,and the acidity was suitable.It showed good catalytic performance for the alkylation of thiophene.