Ordered mesoporous Sn-SBA-15 as support for Pt catalyst with enhanced performance in propane dehydrogenation

doi:10.1016/S1872-2067(17)62805-5

Abstract

Abstract:

A series of Sn-incorporated SBA-15 materials with high specific surface areas and highly ordered mesoporous structures were synthesized by a facile one-pot method and used as catalyst supports. A reference sample was also prepared using a conventional impregnation method. The catalysts were characterized using various methods, and their activities in propane dehydrogenation were investigated. The incorporation of Sn into the SBA-15 matrix led to strong interactions between Sn species and the support, and these helped to maintain the oxidation states of Sn species during the reaction. Substitution with Sn changed the interfacial properties of the Pt species and improved the function and effect of the Sn promoter. The catalytic activities and stabilities of the Pt catalysts supported on Sn-incorporated SBA-15 were better than those of the impregnated sample. However, the catalytic performance deteriorated when an excessive amount of Sn was introduced and the interactions among Pt, Sn species, and the support became weaker. The Pt/0.5Sn-SBA-15 catalyst gave the best propene selectivity, i.e., 98.5%, with a corresponding propane conversion of about 43.8%.

Key words: Propane dehydrogenation, One-pot hydrothermal synthesis, Sn-incorporated SBA-15, Pt-based catalyst, Structure activity relationship

Bing Li, Zhenxin Xu, Wei Chu, Shizhong Luo, Fangli Jing. Ordered mesoporous Sn-SBA-15 as support for Pt catalyst with enhanced performance in propane dehydrogenation[J]. Chinese Journal of Catalysis, 2017, 38(4): 726-735.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(17)62805-5

https://www.cjcatal.com/EN/Y2017/V38/I4/726

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