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High-Temperature Selective Oxidation of H2S to Elemental Sulfur on a beta-SiC-Supported Cerium Catalyst
Xu, Xin; Li, Ganggang; Wei, Zheng; Zhang, Fenglian; Jiang, Guoxia; Cheng, Jie; Zhang, Zhongshen; Zhao, Yaxu; Hao, Zhengping
2021-09-08
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume60Issue:35Pages:12798-12810
AbstractH2S-selective catalytic oxidation at high temperatures is a cost-effective way to directly treat lean acid gas. Herein, cerium supported on a beta-SiC catalyst was synthesized by a simple impregnation method, and the catalytic behavior for the H2S-selective oxidation reaction was evaluated at a relatively high-temperature range (300-550 degrees C). The 10%CeO2/beta-SiC catalyst exhibited excellent H2S conversion (93%) and outstanding sulfur selectivity (94%) at 300 degrees C and could maintain it at 82 and 87%, respectively, even at temperatures up to 550 degrees C. Remarkably, the catalyst revealed prominent reaction stability, which could proceed consecutively at 550 degrees C for 30 h and could also run circularly from 300 to 550 degrees C three times without notable deactivation. This demonstrated that the beta-SiC support allowed good dispersion of CeO2 particles, which further improved the reducibility of the 10% CeO2/beta-SiC catalyst. Furthermore, the abundant oxygen vacancies on the catalyst surface facilitated O-2 activation by providing a large amount of surface adsorbed oxygen and by improving the lattice oxygen mobility. Particularly, the high thermal stability of the beta-SiC support displayed a significant role in high-temperature reactions, and the strong Ce-O-Si interaction between the beta-SiC support and the CeO2 phase allowed the catalyst a good resistance to SO2 poisoning. This work provides a prospective way for the treatment of lean acid gas.
Department环境纳米技术与健康效应重点实验室
WOS Research AreaEngineering, Chemical
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/45885
Collection环境纳米技术与健康效应重点实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
2.Univ Chinese Acad Sci, Natl Engn Lab VOCs Pollut Control Mat & Technol, Beijing 101408, Peoples R China
3.Univ Chinese Acad Sci, Res Ctr Environm Mat & Pollut Control Technol, Beijing 101408, Peoples R China
Recommended Citation
GB/T 7714
Xu, Xin,Li, Ganggang,Wei, Zheng,et al. High-Temperature Selective Oxidation of H2S to Elemental Sulfur on a beta-SiC-Supported Cerium Catalyst[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2021,60(35):12798-12810.
APA Xu, Xin.,Li, Ganggang.,Wei, Zheng.,Zhang, Fenglian.,Jiang, Guoxia.,...&Hao, Zhengping.(2021).High-Temperature Selective Oxidation of H2S to Elemental Sulfur on a beta-SiC-Supported Cerium Catalyst.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,60(35),12798-12810.
MLA Xu, Xin,et al."High-Temperature Selective Oxidation of H2S to Elemental Sulfur on a beta-SiC-Supported Cerium Catalyst".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 60.35(2021):12798-12810.
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