异丙苯裂解反应动力学及HZSM—5沸石表面酸性的表征  

Reaction Kinetics of Cumene Cracking and Characterization of the Surface Acidity of Zeolite HZSM-5

作　　者：刘秀英[1] 王雪梅[1] 李增和[1] 马丽景 向守礼 张仁佑[1] 

机构地区：[1]北京化工大学应用化学系

出　　处：《北京化工大学学报（自然科学版）》1996年第4期71-75,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：中国石化总公司资助

摘　　要：采用脉冲微反色谱法研究在ＨＺＳＭ—５沸石上异丙苯裂解反应动力学，求得反应速率常数、活化能、吸附平衡常数和吸附热．并以该反应为探针，对不同硅铝比的ＨＺＳＭ—５沸石的表面酸性进行了表征，结果表明：随Ｓｉ／Ａｌ比的减少，ＨＺＳＭ—５沸石表面酸性增加．The reaction kinetics of cumene cracking on zeolite HZSM-5 with different ratios of st to Al has been studied by using pulse microreactor chromatography technique. The reaction rate constants, the activation energy, the adsorption heat have been found out. The surface acidihes of zeolites HZSM-5 with different Si/ Al ratios have been Characterized by using the cumene cracking as a probe reaction. The results show that the acidity of zeolite HZSM-5 increases with the decrease of Si/Al.

关 键 词：反应动力学 沸石 异丙苯 裂解 表面酸性 

分 类 号：O643.1[理学—物理化学] O643.32[理学—化学]