Citation: Xin Xu, Ganggang Li, Fenglian Zhang, Guoxia Jiang, Zhengping Hao. High temperature H₂S selective oxidation on a copper-substituted hexaaluminate catalyst: A facile process for treating low concentration acid gas[J]. Chinese Chemical Letters, ;2022, 33(3): 1279-1282. doi: 10.1016/j.cclet.2021.07.053 shu

High temperature H₂S selective oxidation on a copper-substituted hexaaluminate catalyst: A facile process for treating low concentration acid gas

Xin Xu ^{a, b} ,
Ganggang Li ^{a, b} ,
Fenglian Zhang ^{b, *,} ,
Guoxia Jiang ^b ,
Zhengping Hao ^{a, b, **,}

a.
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
b.
National Engineering Laboratory for VOCs Pollution Control Material & Technology, Research Center for Environmental Material and Pollution Control Technology, University of Chinese Academy of Sciences, Beijing 101408, China

zhangfenglian@ucas.ac.cn

zphao@ucas.ac.cn

Received Date: 29 April 2021
Revised Date: 5 June 2021
Accepted Date: 24 July 2021
Available Online: 31 July 2021

Figures(4)

H₂S selective catalytic oxidation technology is a prospective way for the treatment of low concentration acid gas with simple process operation and low investment. However, undesirable results such as large formation of SO₂ and catalyst deactivation inevitably occur, due to the temperature rise of fixed reaction bed caused by the exothermic reaction. Catalyst with high activity in wide operating temperature window, especially in high temperature range, is urgently needed. In this paper, a series of copper-substituted hexaaluminate catalysts (LaCu_x, x = 0, 0.5, 1, 1.5, 2, 2.5) were prepared and investigated for the H₂S selective oxidation reaction at high temperature conditions (300-550℃). The LaCu₁ catalyst exhibited excellent catalytic performance and great stability, which was attributed to the best reductive properties and proper pore structure. Besides, two facile deep processing paths were proposed to eliminate the remaining H₂S and SO₂ in the tail gas.
- Low concentration acid gas,
- H₂S selective oxidation,
- High temperature,
- Hexaaluminate catalyst
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High temperature H₂S selective oxidation on a copper-substituted hexaaluminate catalyst: A facile process for treating low concentration acid gas