Effect of bismuth species on propylene aromatization over BiHZSM-5 catalysts

作     者：MIAO, Cheng-MingDepartment of Chemistry, Jiangsu Institute of Education, Nanjing, Jiangsu 210013, ChinaWU, Chuan-Chang FENG, Lin Department of Chemistry, Nanjing University, Nanjing, Jiangsu 210008, China 

作者机构：Department of Chemistry Jiangsu Institute of Education Nanjing Jiangsu 210013 China Department of Chemistry Nanjing University Nanjing Jiangsu 210008 China 

出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)

年 卷 期：1994年第12卷第4期

页      面：295-304页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

主　　题：Aromatization Bi-impregnation ZSM-5 Propylene. 

摘      要：The catalytic behavior of Bi-impregnated HZSM-5 zeolites in propylene aroma-tization and the surface properties of the zeoh tes were determined by microreactor, XRD, XPS, NH3-TPD and IR-TPD. The mechanism of the reaction and the effect of surface properties of the zeolites on the reaction were also investigated. Experimental data showed that Bi-impregnation made the strength of B-acid sites decrease, the strength of L-acid sites and the concentration of both strong B-acid sites and strong L-acid sites increase. Bi-impregnation also induced sub-strong acid sites. These were the factors that made the aromatic products of the reaction increase. The strong interaction between the impregnant and zeolite surface reached maximum at Bi2O3 = 3.5 wt%. Above this value, covering effect of impregnant caused a decrease of aromatic products.