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Coke Formation on Pt–Sn/Al2O3 Catalyst in Propane Dehydrogenation: Coke Characterization and Kinetic Study

Topics in Catalysis volume 54, Article number: 888 (2011) Cite this article

Abstract

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.

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Acknowledgment

This work is supported by Natural Science Foundation of China (No. 20736011)

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Authors and Affiliations

  1. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China

    Qing Li, Zhijun Sui, Xinggui Zhou, Yian Zhu & Jinghong Zhou

  2. Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), N-7491, Trondheim, Norway

    De Chen

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  1. Qing Li
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  2. Zhijun Sui
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  3. Xinggui Zhou
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  4. Yian Zhu
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  5. Jinghong Zhou
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Correspondence to Xinggui Zhou.

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Li, Q., Sui, Z., Zhou, X. et al. Coke Formation on Pt–Sn/Al2O3 Catalyst in Propane Dehydrogenation: Coke Characterization and Kinetic Study. Top Catal 54, 888 (2011). https://doi.org/10.1007/s11244-011-9708-8

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  • DOI: https://doi.org/10.1007/s11244-011-9708-8

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