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Preparation and desulfurization activity of nano-CeO2/γ-Al2O3 catalysts

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Abstract

γ-Al2O3-supported CeO2 catalysts were prepared by microemulsion and impregnation methods and characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques. At the same time, the desulfurization activity of catalysts was investigated. The results show that nanoscale active substances and a high desulfurization effect are achieved by microemulsion, exhibiting a significant dominance compared with traditional impregnation method. The optimal preparation condition is temperature of 30 °C and ratio of [H2O]/[surface active agent] of 7 with slow demulsification. The activated catalysts still keep high and stable desulfurization activity during a wide temperature range of 450–600 °C. Among a series of prepared catalysts, the desulfurization rate of 6CeO2/γ-Al2O3 is the highest, reaching up to 80 % when temperature is higher than 550 °C. The catalytic reduction mechanism of SO2 over nano-CeO2/γ-Al2O3 follows redox mechanism.

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Acknowledgments

This study was financially supported by the Natural Science Foundation of Hubei Province, China (No. 2009CDB246) and the Applied Basic Research Project of Wuhan City (No. 2015060101010068).

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Authors and Affiliations

  1. School of Environment Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China

    Qi Yang & Hui Hu

  2. Department of Urban Construction, Wuchang Shouyi University, Wuhan, 430064, China

    Qi Yang

  3. Wuhan Zuoling New Town Development and Investment Co., Ltd., Wuhan, 430000, China

    Shan-Shan Wang

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  1. Qi Yang
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  2. Hui Hu
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  3. Shan-Shan Wang
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Correspondence to Hui Hu.

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Yang, Q., Hu, H. & Wang, SS. Preparation and desulfurization activity of nano-CeO2/γ-Al2O3 catalysts. Rare Met. 37, 554–560 (2018). https://doi.org/10.1007/s12598-016-0773-9

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  • DOI: https://doi.org/10.1007/s12598-016-0773-9

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