Pd/AlF3 Catalysts for Catalytic Dehydrofluorination of 1,1,1,3,3-Pentafluoropropane

doi:10.1007/s40242-015-5190-3

Chemical Research in Chinese Universities ›› 2015, Vol. 31 ›› Issue (6): 1003-1006.doi: 10.1007/s40242-015-5190-3

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Pd/AlF₃ Catalysts for Catalytic Dehydrofluorination of 1,1,1,3,3-Pentafluoropropane

WANG Fang, ZHANG Wenxia, LIANG Yan, WANG Yuejuan, LU Jiqing, LUO Mengfei

Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, P. R. China

Received:2015-05-11 Revised:2015-07-15 Online:2015-11-01 Published:2015-10-12
Contact: LUO Mengfei E-mail:mengfeiluo@zjnu.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.21373186).

Abstract

Abstract:

A series of Pd/AlF₃ catalysts was prepared by an impregnation method and tested for vapor-phase dehydrofluorination of 1,1,1,3,3-pentafluoropropane(HFC-245fa) to synthesize 1,3,3,3-tetrafluoropropene(HFO-1234ze). The highest activity was obtained over Pd/AlF₃ catalyst containing 1.0%(mass fraction) of Pd, with an HFC-245fa conversion of 79.5% and an HFO-1234ze selectivity of 99.4% after the reaction at 300 ℃ for 100 h. The reactivity was related to the surface acidity, as AlF₃ provided active sites for the reaction. With the addition of Pd, the catalyst stability could be significantly improved. Raman spectroscopic and thermal-gravimetric analysis results reveal that there was less carbon deposit on spent Pd/AlF₃ catalyst surface because Pd could effectively pyrolyse it. Thus, Pd/AlF₃ catalysts were bi-functional for dehydrofluorination of HFC-245fa.

Key words: Pd/AlF₃ catalyst, Lewis acid, Carbon deposit

WANG Fang, ZHANG Wenxia, LIANG Yan, WANG Yuejuan, LU Jiqing, LUO Mengfei. Pd/AlF₃ Catalysts for Catalytic Dehydrofluorination of 1,1,1,3,3-Pentafluoropropane[J]. Chemical Research in Chinese Universities, 2015, 31(6): 1003-1006.

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Pd/AlF₃ Catalysts for Catalytic Dehydrofluorination of 1,1,1,3,3-Pentafluoropropane

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