文献类型：期刊文献

英文题名：Coke formation on Pt-Sn/Al2O3 catalyst in propane dehydrogenation: Coke characterization and kinetic study

作者：Li, Qing[1]; Sui, Zhijun[1]; Zhou, Xinggui[1]; Zhu, Yian[1]; Zhou, Jinghong[1]; Chen, De[2]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; [2] Department of Chemical Engineering, Norwegian University of Science and Technology [NTNU], N-7491, Trondheim, Norway

年份：2011

卷号：54

期号：13-15

起止页码：888

外文期刊名：Topics in Catalysis

收录：EI(收录号：20114414475775)

语种：英文

外文关键词：Catalysts - Metals - Aluminum compounds - Coke - Dehydrogenation - Propylene - Hydrogen - Platinum compounds - Propane - Tin compounds - Thermogravimetric analysis

摘要：The influences of gas compositions on the rates of coke formation over a Pt-Sn/Al2O3 catalyst are studied. The coke formed on the catalyst is characterized by thermal gravimetric analysis, IR spectroscopy, Raman spectroscopy and elemental analysis. Two kinds of coke are identified from the TPO profiles and assigned to the coke on the metal and the coke on the support, respectively. The coke formed on the metal is softer (containing more hydrogen) than that formed on the support. The rate of coke formation on the metal is weakly dependent on the propylene and hydrogen pressures but increasing with the propane pressure, while the rate of coke formation on the support is increasing with the propane and propylene pressures and decreasing with the hydrogen pressure. Based on the kinetic analysis, a mechanism for the coke formation on the Pt-Sn/Al2O3 catalyst is proposed, and the dimerization of adsorbed C3H6 is identified to be the kinetic relevant step for coke formation on the metal. ? 2011 Springer Science+Business Media, LLC.