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Desulfurization of coke oven gas using char-supported Fe-Zn-Mo catalysts: Mechanisms and thermodynamics

  • Catalysis, Reaction Engineering
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Abstract

Sulfidation properties of char-supported Fe-Zn-Mo sorbents prepared by ultrasonic impregnation method were investigated during simultaneous removal of H2S and COS from coke oven gas (COG) using a fixed-bed quartz reactor. Sorbent samples before and after sulfidation were analyzed using X-Ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The experimental results showed that the addition of Mo significantly improved the desulfurization properties (i.e., breakthrough time, sulfur capacity and desulfurization efficiency) of Fe-Zn sorbents. Desulfurization reactions were exothermic and thermodynamically favorable in the temperature range of 200–400 °C. Thermodynamic analysis of the sorbents indicated that higher concentration of H2S and lower concentration of H2 favors the reaction of metal oxides with H2S to form metal sulfides.

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Authors and Affiliations

  1. Key Laboratory for Advanced Coal and Coking Technology of Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, China

    Jinxiao Dou, Xianchun Li, Arash Tahmasebi, Jing Xu & Jianglong Yu

  2. Chemical Engineering, University of Newcastle, Callaghan, NSW, 2308, Australia

    Jianglong Yu

Authors
  1. Jinxiao Dou
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  2. Xianchun Li
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  3. Arash Tahmasebi
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  4. Jing Xu
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  5. Jianglong Yu
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Correspondence to Jianglong Yu.

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Dou, J., Li, X., Tahmasebi, A. et al. Desulfurization of coke oven gas using char-supported Fe-Zn-Mo catalysts: Mechanisms and thermodynamics. Korean J. Chem. Eng. 32, 2227–2235 (2015). https://doi.org/10.1007/s11814-015-0059-1

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  • DOI: https://doi.org/10.1007/s11814-015-0059-1

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