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

doi:10.1016/j.cjche.2013.07.001

›› 2014, Vol. 22 ›› Issue (11/12): 1232-1236.DOI: 10.1016/j.cjche.2013.07.001

• 催化、动力学与反应工程 • 上一篇下一篇

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

Jing Feng^1,2, Mingsen Zhang², Yuanyi Yang ¹

1 College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
2 Beijing Research Institute of Chemical Industry, SINOPEC, Beijing 100013, China

收稿日期:2013-03-21 修回日期:2013-07-15 出版日期:2014-12-28 发布日期:2014-12-24
通讯作者: Jing Feng

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

Jing Feng^1,2, Mingsen Zhang², Yuanyi Yang ¹

1 College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
2 Beijing Research Institute of Chemical Industry, SINOPEC, Beijing 100013, China

Received:2013-03-21 Revised:2013-07-15 Online:2014-12-28 Published:2014-12-24

摘要/Abstract

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

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

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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