Enhanced SO2 reduction to sulfur over mesoporous MoS2-Al2O3 catalyst

doi:10.1016/j.cjche.2025.05.027

Chinese Journal of Chemical Engineering ›› 2025, Vol. 87 ›› Issue (11): 220-228.DOI: 10.1016/j.cjche.2025.05.027

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Enhanced SO₂ reduction to sulfur over mesoporous MoS₂-Al₂O₃ catalyst

Yiqian Yang^1,2, Erqiang Wang³, Shuguang Xiang¹, Chunshan Li²

1. Institute of Process Systems Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
2. State Key Laboratory of Mesoscience and Engineering, CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Solid-State Battery and Energy Storage Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
3. School of Chemical Science, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2025-03-23 Revised:2025-05-21 Accepted:2025-05-21 Online:2025-07-12 Published:2025-11-28
Contact: Shuguang Xiang,E-mail:xsg@qust.edu.cn;Chunshan Li,E-mail:csli@ipe.ac.cn
Supported by:
This work is supported by the National Natural Science Fund for Distinguished Young Scholars (22025803), and Shandong Provincial Key Laboratory of Chemical Process Simulation and Optimization Industrial Software (PKL2024F23).

Enhanced SO₂ reduction to sulfur over mesoporous MoS₂-Al₂O₃ catalyst

Yiqian Yang^1,2, Erqiang Wang³, Shuguang Xiang¹, Chunshan Li²

1. Institute of Process Systems Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
2. State Key Laboratory of Mesoscience and Engineering, CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Solid-State Battery and Energy Storage Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
3. School of Chemical Science, University of Chinese Academy of Sciences, Beijing 100049, China

通讯作者: Shuguang Xiang,E-mail:xsg@qust.edu.cn;Chunshan Li,E-mail:csli@ipe.ac.cn
基金资助:
This work is supported by the National Natural Science Fund for Distinguished Young Scholars (22025803), and Shandong Provincial Key Laboratory of Chemical Process Simulation and Optimization Industrial Software (PKL2024F23).

Abstract

Abstract: Recovery of sulfur from efficient reduction of effluent SO₂ is of great significance considering the sulfuric resource utilization and environmental protection. Herein, a kind of mesoporous MoS₂-Al₂O₃ catalyst with high specific surface area and porous structure was developed by a modified one-pot evaporation induced self-assembly (EISA) method, using Pluronic P123 (M = 5800) as template reagent and anhydrous ethanol as solvent. The effect of Mo source, acidic environment and amount of citric acid additive on the physicochemical properties and consequential catalytic performance was systematically investigated by XRD, BET, ICP-OES, TEM, H₂-TPR and XPS. The specific surface area and sulfurization of catalyst could be remarkably enhanced with the increasing amount of citric acid additive. While the degree of sulfidation is closely related to the catalytic activity. As a result, the 10%MoS₂-Al₂O₃-AM catalyst with mesoporous structure showed excellent catalytic performance on the SO₂ reduction to sulfur, with 98.5% SO₂ conversion and 95.3% sulfur selectivity at 350 °C and 3000 h^-1. It should be helpful for the design of effective catalysts used in SO₂ recovery.

Key words: SO₂ reduction, Sulfur, Self-assembly, Physicochemical properties, Mesoporous structure

摘要： Recovery of sulfur from efficient reduction of effluent SO₂ is of great significance considering the sulfuric resource utilization and environmental protection. Herein, a kind of mesoporous MoS₂-Al₂O₃ catalyst with high specific surface area and porous structure was developed by a modified one-pot evaporation induced self-assembly (EISA) method, using Pluronic P123 (M = 5800) as template reagent and anhydrous ethanol as solvent. The effect of Mo source, acidic environment and amount of citric acid additive on the physicochemical properties and consequential catalytic performance was systematically investigated by XRD, BET, ICP-OES, TEM, H₂-TPR and XPS. The specific surface area and sulfurization of catalyst could be remarkably enhanced with the increasing amount of citric acid additive. While the degree of sulfidation is closely related to the catalytic activity. As a result, the 10%MoS₂-Al₂O₃-AM catalyst with mesoporous structure showed excellent catalytic performance on the SO₂ reduction to sulfur, with 98.5% SO₂ conversion and 95.3% sulfur selectivity at 350 °C and 3000 h^-1. It should be helpful for the design of effective catalysts used in SO₂ recovery.

关键词: SO₂ reduction, Sulfur, Self-assembly, Physicochemical properties, Mesoporous structure

Yiqian Yang, Erqiang Wang, Shuguang Xiang, Chunshan Li. Enhanced SO₂ reduction to sulfur over mesoporous MoS₂-Al₂O₃ catalyst[J]. Chinese Journal of Chemical Engineering, 2025, 87(11): 220-228.

Yiqian Yang, Erqiang Wang, Shuguang Xiang, Chunshan Li. Enhanced SO₂ reduction to sulfur over mesoporous MoS₂-Al₂O₃ catalyst[J]. 中国化学工程学报, 2025, 87(11): 220-228.

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Enhanced SO₂ reduction to sulfur over mesoporous MoS₂-Al₂O₃ catalyst

Enhanced SO₂ reduction to sulfur over mesoporous MoS₂-Al₂O₃ catalyst

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