Preparation of MoO3/γ-Al2O3 sulfur-resistant methanation catalyst with segmented plasma fluidized bed

doi:10.1016/j.cjche.2025.02.014

中国化学工程学报 ›› 2025, Vol. 81 ›› Issue (5): 142-150.DOI: 10.1016/j.cjche.2025.02.014

Preparation of MoO₃/γ-Al₂O₃ sulfur-resistant methanation catalyst with segmented plasma fluidized bed

Baowei Wang, Jiangzhou Kong, Xiaoyan Li

Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

收稿日期:2024-09-11 修回日期:2025-02-14 接受日期:2025-02-24 出版日期:2025-05-28 发布日期:2025-03-09
通讯作者: Baowei Wang,E-mail:wangbw@tju.edu.cn
基金资助:
This work is financially supported by the National Natural Science Foundation of China (22178255).

Preparation of MoO₃/γ-Al₂O₃ sulfur-resistant methanation catalyst with segmented plasma fluidized bed

Baowei Wang, Jiangzhou Kong, Xiaoyan Li

Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Received:2024-09-11 Revised:2025-02-14 Accepted:2025-02-24 Online:2025-05-28 Published:2025-03-09
Contact: Baowei Wang,E-mail:wangbw@tju.edu.cn
Supported by:
This work is financially supported by the National Natural Science Foundation of China (22178255).

摘要/Abstract

摘要： In order to solve the shortcomings of MoO₃/γ-Al₂O₃ catalyst for sulfur-resistant methanation, a segmented plasma fluidized bed reactor was designed, where plasma discharge zone and the fluidization zone were separated under higher discharge power. At the bed height of 30 mm, the gas velocity of 0.10 m·s^-1 can provide a better fluidization state. The suitable discharge results can be achieved when the input power is 27 W and the discharge interval is 2.0 mm. With the extension of catalyst plasma treatment time, the conversion of CO decreases, but the selectivity of CH₄ increases. Combined with N₂ physical adsorption-desorption, XRD, TEM, Raman, TGA and TPR characterization, it was found that the active components of the catalyst are uniformly dispersed on the γ-Al₂O₃ support. After plasma treatment, tetrahedral Mo species was used as the active center, and the interaction between Mo and the carrier was strengthened. It provides a novel approach for preparing catalyst with dielectric barrier discharge (DBD) fluidized bed reactor.

关键词: Plasma, Sulfur-resistant methanation, Methane, Catalyst, Fluidized-bed

Abstract: In order to solve the shortcomings of MoO₃/γ-Al₂O₃ catalyst for sulfur-resistant methanation, a segmented plasma fluidized bed reactor was designed, where plasma discharge zone and the fluidization zone were separated under higher discharge power. At the bed height of 30 mm, the gas velocity of 0.10 m·s^-1 can provide a better fluidization state. The suitable discharge results can be achieved when the input power is 27 W and the discharge interval is 2.0 mm. With the extension of catalyst plasma treatment time, the conversion of CO decreases, but the selectivity of CH₄ increases. Combined with N₂ physical adsorption-desorption, XRD, TEM, Raman, TGA and TPR characterization, it was found that the active components of the catalyst are uniformly dispersed on the γ-Al₂O₃ support. After plasma treatment, tetrahedral Mo species was used as the active center, and the interaction between Mo and the carrier was strengthened. It provides a novel approach for preparing catalyst with dielectric barrier discharge (DBD) fluidized bed reactor.

Key words: Plasma, Sulfur-resistant methanation, Methane, Catalyst, Fluidized-bed

Baowei Wang, Jiangzhou Kong, Xiaoyan Li. Preparation of MoO₃/γ-Al₂O₃ sulfur-resistant methanation catalyst with segmented plasma fluidized bed[J]. 中国化学工程学报, 2025, 81(5): 142-150.

Baowei Wang, Jiangzhou Kong, Xiaoyan Li. Preparation of MoO₃/γ-Al₂O₃ sulfur-resistant methanation catalyst with segmented plasma fluidized bed[J]. Chinese Journal of Chemical Engineering, 2025, 81(5): 142-150.

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Preparation of MoO₃/γ-Al₂O₃ sulfur-resistant methanation catalyst with segmented plasma fluidized bed

Preparation of MoO₃/γ-Al₂O₃ sulfur-resistant methanation catalyst with segmented plasma fluidized bed

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