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

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

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7 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)2227-2235
Number of pages9
JournalKorean Journal of Chemical Engineering
Volume32
Issue number11
DOIs
Publication statusPublished - 17 Aug 2015
Externally publishedYes

Keywords

  • Char-supported Sorbents
  • Coke Oven Gas
  • Sulfidation
  • Sulfur Capacity

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