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Preparation of carbon-doped alumina beads and their application as the supports of Pt–Sn–K catalysts for the dehydrogenation of propane

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Abstract

Carbon-doped alumina (CDA) beads with different carbon contents were prepared by an ammonium alginate (ALG) assisted sol–gel method via changing the concentration of ALG in preparation process, which were used as the support of Pt–Sn–K catalysts. XRF, XRD, BET, TEM, EDS, NH3-TPD, TG and Raman techniques were employed to characterize the physical–chemical properties of CDA materials and Pt–Sn–K catalysts. Results showed that the as-prepared CDA materials all contained carbon and the carbon content was positively correlated with the concentration of ALG used in preparation process. The addition of carbon improved obviously the activity and stability of catalysts in propane dehydrogenation reaction due to larger specific surface (> 320 m2/g), more weak and moderate acid sites and strong resistance to carbon deposition. The PtSnK/CDA-1.5 with the optimal carbon content of 2.6 wt% exhibited the best activity and stability, for which the propane conversion was just declined from 36.4 to 28.7% and the propene selectivity remained above 96.7% even after the reaction for 106 h.

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Acknowledgements

We gratefully acknowledge the financial supports from the National Natural Science Foundation of China (Nos. 21276190 and 20806059) and Tianjin Natural Science Foundation (15 JCYBJC20900).

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Authors and Affiliations

  1. Tianjin Key Laboratory of Applied Catalysis Science and Technology, College of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China

    Qian Li, Gongbing Yang, Kang Wang & Xitao Wang

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  1. Qian Li
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  2. Gongbing Yang
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  3. Kang Wang
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  4. Xitao Wang
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Correspondence to Xitao Wang.

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Li, Q., Yang, G., Wang, K. et al. Preparation of carbon-doped alumina beads and their application as the supports of Pt–Sn–K catalysts for the dehydrogenation of propane. Reac Kinet Mech Cat 129, 805–817 (2020). https://doi.org/10.1007/s11144-020-01753-4

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  • DOI: https://doi.org/10.1007/s11144-020-01753-4

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