Kinetics of the Formation of Carbonyl Sulfide in γ-FeOOH Desulfurization at Ambient Temperature

Abstract:

Due to high in desulfurization activity, big in sulfur capacity and easy in regeneration, iron oxide desulfurization sorbents have been used to remove hydrogen sulfide derived from coal gas at normal temperature. At the same time the removing H₂S from coal gas containing CO can generate COS, which is more difficult to removal than H₂S. γ-FeOOH desulfurization sorbent was prepared by the fast oxidizing method. Kinetics study of COS formation in γ-FeOOH desulfurization was performed under 40-80°C，the CO+H₂S+N₂ mixtures and over a residence time of 0.04~0.09s. LevenbergMarquardt and lsqcurvefit methods in MATLAB are used for the regression of experimental data. The established kinetics model of COS formation is described by the following: r_COS=8.9990*10⁴exp(-22540/RT)P_COP_H2S. The recognition of mechanism model reveals that Langmuir-Hinshelwood mechanism can perfectly fit with this reaction system.

• Periodical: Advanced Materials Research (Volumes 550-553)
• Pages: 2773-2776
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.550-553.2773
• Online since: July 2012
• Authors: Qiao Fen Zhang, Shang Guan Ju*, Fei Xue, Xian Bin Dong, Yan Peng Zhao, Hui Ling Fan
• Keywords: Ambient Temperature, Carbonyl Sulfide, Desulfurization, Formation, γ-FeOOH

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