高能气流粉碎对ZSM—5分子筛结构与性能的影响  

INFLUENCE OF AIRSTREAM PUL VERIZATION ON STRUCTURE AND PROPERTIES OF ZSM-5 ZEOLITE

作　　者：董为毅[1] 张文杰[1] 陶克毅[1] 李赫[1] 

机构地区：[1]南开大学新能源材料化学研究所,南开大学化学系

出　　处：《燃料化学学报》1995年第3期322-326,共5页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金

摘　　要：本文用高能气流粉碎法将ＺＳＭ－５分子筛原粉粉碎成微颗粒，进行了粒度分布、比表面、电镜及Ｘ射线衍射的测定。考察了正己烷裂化、异丙苯裂解反应的催化活性，并对异丙苯裂解反应的产物分布和表现活化能作了分析和计算。实验结果表明，ＺＳＭ－５分子筛经粉碎后粉体粒度分布狭窄，总比表面没有变化而外比表面有明显增加，ｘ射线衍射峰也有显著改变。ＺＳＭ－５原粉的晶型未破坏，却暴露出更多的活性中心，反应表观活化能没有明显改变，而催化活性有显著提高。The HZSM-5 particles can be pulverized to fine particles by airstream.Theparticle size distribution、total and external surface areas、SEM and XRD are determined forboth of the raw and the fine particles。 After ZSM-5 zeolite is pulverized,the particle sizedistribution becomes narrower and the total surface area does not change,but the externalsurface area and the peaks of XRD are significantly changed.By examining the catalytic ac-tivities in hexane and cumene cracking,it is found that the crystall structure of the pulver-ized ZSM-5 particles has not been destrooed,but more active centers are exposed and thereis no significant variation of apparent active energy,but the catalytic activity remarkably in- creases.

关 键 词：气流粉碎 分子筛 裂化 ZSM-5分子筛 结构 

分 类 号：TQ424.25[化学工程]