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- Publisher
- Wiley
- Copyright
- Copyright © 1994 Wiley Subscription Services, Inc., A Wiley Company
- ISSN
- 1001-604X
- eISSN
- 1614-7065
- DOI
- 10.1002/cjoc.19940120402
- Publisher site
- See Article on Publisher Site
Abstract
The catalytic behavior of Bi‐impregnated HZSM‐5 zeolites in propylene aromatization and the surface properties of the zeolites 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.
Journal
Chinese Journal of Chemistry – Wiley
Published: Jul 1, 1994
Keywords: ; ;