Dehydrogenation of Propane on Pt or PtSn Catalysts with Al2O3 or SBA-15 Support

doi:10.1016/j.cjche.2013.07.001

Abstract

Abstract: Dehydrogenation of propane on Pt or PtSn catalyst over Al₂O₃ or SBA-15 support was investigated. The catalysts were characterized by CO-pulse chemisorption, thermogravimetry, temperature-programmed-reduction of H₂, and diffuse reflectance infrared Fourier transform spectroscopy of absorbed CO. The results show that the platinum species is in oxidation state in the catalyst on Al₂O₃ support, so the catalyst must be reduced in H₂ before dehydrogenation reaction. Addition of Sn improves the Pt dispersion, but the catalyst deactivates rapidly because of the coke formation. The interaction of Pt and Al₂O₃ is strong. On SBA-15 support, the platinum species is completely reduced to Pt⁰ in the calcination process, so the reduction is not needed. Addition of Sn improves the activity and selectivity of the catalyst. The interaction of Pt and SBA-15 is weak, so it is easy for Pt particles to sinter.

Key words: Propane dehydrogenation, PtSn, Al₂O₃, SBA-15

摘要： Dehydrogenation of propane on Pt or PtSn catalyst over Al₂O₃ or SBA-15 support was investigated. The catalysts were characterized by CO-pulse chemisorption, thermogravimetry, temperature-programmed-reduction of H₂, and diffuse reflectance infrared Fourier transform spectroscopy of absorbed CO. The results show that the platinum species is in oxidation state in the catalyst on Al₂O₃ support, so the catalyst must be reduced in H₂ before dehydrogenation reaction. Addition of Sn improves the Pt dispersion, but the catalyst deactivates rapidly because of the coke formation. The interaction of Pt and Al₂O₃ is strong. On SBA-15 support, the platinum species is completely reduced to Pt⁰ in the calcination process, so the reduction is not needed. Addition of Sn improves the activity and selectivity of the catalyst. The interaction of Pt and SBA-15 is weak, so it is easy for Pt particles to sinter.

关键词: Propane dehydrogenation, PtSn, Al₂O₃, SBA-15

Jing Feng, Mingsen Zhang, Yuanyi Yang . Dehydrogenation of Propane on Pt or PtSn Catalysts with Al₂O₃ or SBA-15 Support[J]. , 2014, 22(11/12): 1232-1236.

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Dehydrogenation of Propane on Pt or PtSn Catalysts with Al₂O₃ or SBA-15 Support

Dehydrogenation of Propane on Pt or PtSn Catalysts with Al₂O₃ or SBA-15 Support

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