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K2WO4/Al2O3 catalysts for methanethiol synthesis from methanol and H2S: effect of catalyst preparation procedure

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Abstract

A series of the K2WO4/γ–Al2O3 catalysts was prepared with different introducing strategy of the K2WO4 to alumina and characterized by means of N2 adsorption–desorption, XRD, XPS, CO2/NH3-TPD, H2-TPR. It was found that the different introduction strategy of K2WO4 did not change the valence state of surface species of the catalysts but markedly influenced the structures, dispersion of tungsten and potassium species and acid-basic properties. The catalysts prepared by the sol–gel precipitation method exhibit larger surface area, better dispersion of the W species and more favorable acid-basic properties, thus possess higher activity for the reaction, particularly, at the lower reaction temperature of 320 °C, the methanethiol yield was about 8.3% higher than that over the catalyst prepared by traditional impregnation method. As a model catalyst, the catalysts prepared by sol–gel precipitation method show a higher and more stable reactivity with small dosage of water and CS2, and worth in industrial application.

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Acknowledgements

We gratefully acknowledge the Natural Science Foundation of Fujian Province (2016J05044, 2018J01441).

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Authors and Affiliations

  1. Department of Chemical Engineering and Pharmacy, College of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou, 362000, Fujian, People’s Republic of China

    Shiping Chen, Liqin Lin & Xiaolian Jing

  2. Shanghai Huafon Material Technology Institute, Shanghai, 201203, People’s Republic of China

    Yuanhua Zhang

  3. Department of Chemistry, College of Chemistry and Chemical Engineering, and National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Xiamen University, Xiamen, 361005, People’s Republic of China

    Yiquan Yang

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  1. Shiping Chen
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  2. Yuanhua Zhang
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  3. Liqin Lin
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  4. Xiaolian Jing
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  5. Yiquan Yang
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Correspondence to Shiping Chen.

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Chen, S., Zhang, Y., Lin, L. et al. K2WO4/Al2O3 catalysts for methanethiol synthesis from methanol and H2S: effect of catalyst preparation procedure. Reac Kinet Mech Cat 127, 917–930 (2019). https://doi.org/10.1007/s11144-019-01614-9

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