淀粉模板法合成介孔ZSM-5分子筛  

THE MESOPOROUS ZSM-5 SYNTHEIZED WITH STARCH CO-TEMPLATE

作　　者：刘志成[1] 孔德金[1] 王仰东[1] 谢在库[1] 

机构地区：[1]中国石化上海石油化工研究院,上海201208

出　　处：《石油学报（石油加工）》2008年第B10期124-126,135,共4页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家重大基础研究发展计划973项目（2003CB615802）资助

摘　　要：采用淀粉为模板剂合成了-种新的介孔ZSM-5分子筛，并用XRD、SEM、TEM、低温氮气吸附等手段对其物相和孔结构进行了表征。结果表明，介孔ZSM-5分子筛的晶粒内包含晶内介孔，且介孔孔容随合成中淀粉模板剂比例的增加而增大。将该分子筛用于超临界甲苯歧化反应，失活速率慢于常规的ZSM-5分子筛，其原因可能是因为介孔分子筛的扩散性能提高所致。A new kind of mesoporous ZSM-5 was hydrothermal synthesized by using starch as co-template. The physical properties and pore structure of the mesoporous ZSM-5 were characterized by various measurements, such as XRD, SEM, TEM, N2 adsorption measurement, et. , which demonstrated that there was a considerable sum of mesopores inside the zeolite crystallites, and their mesopore volume would increase as the amount of starch co-template added in the reaction mixture was increased. In addition, catalysis studies on the reaction of supercritical toluene disproportionation revealed that the mesoporous ZSM-5 catalyst had relatively lower deactivate rate than the conventional ZSM-5 catalyst, which may be due to the improvement of the diffusion within the mesoporus zeolite.

关 键 词：ZSM-5 介孔分子筛 淀粉 甲苯歧化 

分 类 号：O613.72[理学—无机化学] O741.4[理学—化学]