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Synthesis of magnesium-modified mesoporous Al2O3 with enhanced catalytic performance for propane dehydrogenation

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Abstract

Magnesium (Mg)-modified mesoporous alumina with different type and content of Mg was prepared and then used as the support for platinum-tin catalyst in propane dehydrogenation. It was found that the property of Mg in Al2O3 varied with the way of the addition of Mg precursors. For the grafted Mg species, the connection between Al2O3 and Mg was increased by the forming of Mg–O–Al bonds in the inner surface of Al2O3 pore. While for the traditional impregnation, Mg was attached loosely to the outer Al2O3 surface by the aggregation of MgO. Moreover, modifying the internal framework of Al2O3 by suitable content of Mg can enhance the interaction between Sn and support, leading to more amounts of tin in their oxidized states, which was beneficial to enhance the interaction of Pt with SnOx species. As a result, agglomerations of metallic particles were suppressed and the catalyst exhibited the best catalytic performance in terms of activity and stability.

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Acknowledgements

The authors are grateful to the financial supports of the National Natural Science Foundation of China (Grant No. 21376051, 21106017, 21306023 and 51077013), the Natural Science Foundation of Jiangsu (Grant No. BK20131288), Fund Project for Transformation of Scientific and Technological Achievements of Jiangsu Province of China (Grant No. BA2011086), Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20100092120047), Key Program for the Scientific Research Guiding Found of Basic Scientific Research Operation Expenditure of Southeast University (Grant No. 3207043101) and Instrumental Analysis Fund of Southeast University.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Southeast University, Jiang ning District, Nanjing, 211189, People’s Republic of China

    Junjun Shi, Yuming Zhou, Yiwei Zhang, Shijian Zhou, Zewu Zhang, Jie Kong & Mingpeng Guo

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  1. Junjun Shi
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  2. Yuming Zhou
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  3. Yiwei Zhang
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Correspondence to Yuming Zhou.

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Shi, J., Zhou, Y., Zhang, Y. et al. Synthesis of magnesium-modified mesoporous Al2O3 with enhanced catalytic performance for propane dehydrogenation. J Mater Sci 49, 5772–5781 (2014). https://doi.org/10.1007/s10853-014-8303-3

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