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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
【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.
【Abstract】 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;
脉冲微反色谱法;
探针反应;
表面酸性;
【Key words】 reaction kinetics; zeolite; cumene cracking; pulse microreactor chromatography technique; probe reaction; surface acidity;
【Key words】 reaction kinetics; zeolite; cumene cracking; pulse microreactor chromatography technique; probe reaction; surface acidity;
【基金】 中国石化总公司资助
- 【文献出处】 北京化工大学学报(自然科学版) ,JOURNAL OF BEIJING UNIVERSITY OF CHEMICAL TECHNOLOGY , 编辑部邮箱 ,1996年04期
- 【分类号】O64
- 【被引频次】1
- 【下载频次】188