Sulfur production from smelter off-gas using CO-H2 gas mixture as the reducing agent over modified Fe/γ-Al2O3 catalysts

doi:10.1016/j.cjche.2018.03.031

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (9): 1920-1927.DOI: 10.1016/j.cjche.2018.03.031

• Catalysis, Kinetics and Reaction Engineering • Previous Articles Next Articles

Sulfur production from smelter off-gas using CO-H₂ gas mixture as the reducing agent over modified Fe/γ-Al₂O₃ catalysts

Tingting Ge¹, Cuncun Zuo^2,3, Lubin Wei¹, Chunshan Li^2,3

1 School of Chemical and Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China;
2 Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, The National Key Laboratory of Clean and Efficient Coking Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
3 College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100190, China

Received:2018-01-29 Revised:2018-03-23 Online:2018-10-17 Published:2018-09-28
Contact: Lubin Wei,E-mail addresses:wlb@cumtb.edu.cn;Chunshan Li,E-mail addresses:csli@ipe.ac.cn
Supported by:
Supported by the National Science Fund for Excellent Young Scholars (21422607), Key Program of National Natural Science Foundation of China (91434203).

Sulfur production from smelter off-gas using CO-H₂ gas mixture as the reducing agent over modified Fe/γ-Al₂O₃ catalysts

Tingting Ge¹, Cuncun Zuo^2,3, Lubin Wei¹, Chunshan Li^2,3

1 School of Chemical and Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China;
2 Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, The National Key Laboratory of Clean and Efficient Coking Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
3 College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100190, China

通讯作者: Lubin Wei,E-mail addresses:wlb@cumtb.edu.cn;Chunshan Li,E-mail addresses:csli@ipe.ac.cn
基金资助:
Supported by the National Science Fund for Excellent Young Scholars (21422607), Key Program of National Natural Science Foundation of China (91434203).

Abstract

Abstract: A series of modified γ-Al₂O₃ supported iron-based catalysts (M-Fe/γ-Al₂O₃) was developed to reduce SO₂ in actual smelter off-gases using CO-H₂ gas mixture as reducing agent for sulfur production. Used as modifiers, three metal additives-Ni, Co, and Ce were added to Fe/γ-Al₂O₃ catalysts. Changes in catalyst structure and active phase were characterized with X-ray diffraction, XPS, SEM, and EDS. The reduction ability of catalysts was exhibited via CO-TPR. The prepared catalysts only need to be pre-reacted for a period of time, eliminating the need for presulfidation treatment. Reaction conditions were optimized in a fixed bed reactor to achieve high SO₂ conversion and sulfur selectivity. XRD characterization was carried out to verify the resulting sulfur products. Combining in situ infrared characterization and catalyst evaluation of support and active component, the reaction mechanism was investigated and proposed.

Key words: Iron-based catalysts, Sulfur production, CO-H₂ gas mixture, Reaction mechanism

摘要： A series of modified γ-Al₂O₃ supported iron-based catalysts (M-Fe/γ-Al₂O₃) was developed to reduce SO₂ in actual smelter off-gases using CO-H₂ gas mixture as reducing agent for sulfur production. Used as modifiers, three metal additives-Ni, Co, and Ce were added to Fe/γ-Al₂O₃ catalysts. Changes in catalyst structure and active phase were characterized with X-ray diffraction, XPS, SEM, and EDS. The reduction ability of catalysts was exhibited via CO-TPR. The prepared catalysts only need to be pre-reacted for a period of time, eliminating the need for presulfidation treatment. Reaction conditions were optimized in a fixed bed reactor to achieve high SO₂ conversion and sulfur selectivity. XRD characterization was carried out to verify the resulting sulfur products. Combining in situ infrared characterization and catalyst evaluation of support and active component, the reaction mechanism was investigated and proposed.

关键词: Iron-based catalysts, Sulfur production, CO-H₂ gas mixture, Reaction mechanism

Tingting Ge, Cuncun Zuo, Lubin Wei, Chunshan Li. Sulfur production from smelter off-gas using CO-H₂ gas mixture as the reducing agent over modified Fe/γ-Al₂O₃ catalysts[J]. Chin.J.Chem.Eng., 2018, 26(9): 1920-1927.

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Sulfur production from smelter off-gas using CO-H₂ gas mixture as the reducing agent over modified Fe/γ-Al₂O₃ catalysts

Sulfur production from smelter off-gas using CO-H₂ gas mixture as the reducing agent over modified Fe/γ-Al₂O₃ catalysts

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