摘要
以改良的Stober方法制得的介孔硅球为硅源兼硬模板剂,合成硅铝摩尔比为30的多级孔ZSM-5分子筛。采用XRD、FESEM、N_2吸附-脱附、NH_3-TPD等手段对合成的样品进行表征,研究晶化温度、晶化时间、晶化方法对分子筛形貌和结构性能的影响,并将其应用于甲醇制芳烃(Methonal to Aromatics,MTA)反应。结果表明,以介孔硅球作为硅源兼硬模板剂,在110℃条件下晶化72 h能够得到结晶度较高的ZSM-5分子筛,该分子筛含有丰富的介孔及大孔,比表面积高达529 m^2/g,且在MTA反应中表现出比较好的催化稳定性。
Mesoporous silica sphere prepared by the modified Stober method is used as silicon source and hard template to synthesize hierarchical pore ZSM-5 molecular sieve with Si/Al ratio of 30. The obtained samples are characterized by XRD,FESEM,N2 adsorption-desorption and NH3-TPD. The effects of temperature,time and method of crystallization on the morphology and structural performance of molecular sieve are investigated.The catalytic performance of samples is evaluated through applying to methanol to aromatics(MTA） reaction. The results show that the ZSM-5 molecular sieve with high crystallinity can be made through using mesoporous silica sphere as silicon source and hard template and performing crystallization at 110℃ for 72 h.This molecular sieve has rich mesopores and macropores with a specific surface area of 529 m2·g（-1）,and exhibits better catalytic stability in MTA reaction.
作者
佟鑫
魏振浩
朱学栋
TONG Xin;WEI Zhen-hao;ZHU Xue-dong(Engineering Research Center of Large Scale Reactor Engineering and Technology of the Ministry of Education, East China University of Science and Technology, Shanghai 200237, China;State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China)
出处
《现代化工》
CAS
CSCD
北大核心
2018年第5期150-154,共5页
Modern Chemical Industry
关键词
ZSM-5分子筛
多级孔
硅球
晶化方法
ZSM-5 molecular sieve
hierarchical pore
silica sphere
crystallization method
