晶种和有机模板剂接力导向合成ZSM-5分子筛及其催化性能  

SYNTHESIS OF ZSM-5 MOLECULAR SIEVE BY CRYSTAL SEED AND ORGANIC TEMPLATING AGENT RELAY-DIRECTED AND ITS CATALYTIC PERFORMANCE

作　　者：张燕挺 任嘉欣 郭云鸦 李晓峰[1] 窦涛[1] Zhang Yanting;Ren Jiaxin;Guo Yunya;Li Xiaofeng;Dou Tao(College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024)

机构地区：[1]太原理工大学化学工程与技术学院,太原030024

出　　处：《石油炼制与化工》2024年第7期62-68,共7页Petroleum Processing and Petrochemicals

摘　　要：以晶种和有机模板剂接力导向(简称接力法)合成出ZSM-5分子筛,晶型、形貌、体相硅铝比和孔结构性质等均与传统法合成的ZSM-5分子筛接近。对比接力法和传统法制备的ZSM-5分子筛在以1,3,5-三异丙苯催化裂化为探针反应上的催化性能,结果是接力法制备的ZSM-5分子筛上的1,3,5-三异丙苯转化率较低,表明此方法制备的ZSM-5分子筛表面富硅贫铝。进一步,将两种方法合成的分子筛制备成异构化催化剂,应用于催化乙苯脱乙基型二甲苯异构化反应,结果表明,相同反应条件下接力法制备的ZSM-5分子筛上的乙苯转化率更高,而异构化活性和二甲苯损失率更低。可见,晶种和有机模板剂接力导向是制备铝含量不同的核壳分子筛的一种可行方法。ZSM-5 zeolite was synthesized by the relay-oriented method of crystal seed and organic template agent,and the obtained ZSM-5 zeolite has similar crystalline structure,morphology,bulk Si/Al ratio,and pore structure to those of ZSM-5 zeolite synthesized by traditional methods.The performance of zSM-5 zeolite synthesized by the relay method and traditional methods was compared on the reaction with 1,3,5-trisopropylbenzene catalytic cracking as probe.The results showed that the conversion of 1,3,5-trisopropylbenzene of ZSM-5 zeolite prepared by the relay method was low,which indicated that the surface of ZSM-5 zeolite prepared by the this method was rich in silicon and poor in aluminum.Furthermore,the zeolites synthesized by both methods were used as isomerization catalysts for ethylbenzene isomerization.Under the same reaction conditions,the ethylbenzene conversion of zSM-5 zeolite prepared by the relay method was higher,but the isomerization activity and xylene loss rate were lower.It can be seen that crystal seed and organic template agent relaying is a feasible method to prepare core-shell molecular sieve with different aluminum content.

关 键 词：分子筛 乙苯 脱乙基 二甲苯异构化 晶种 有机模板剂 

分 类 号：O643.36[理学—物理化学]