High temperature H2S selective oxidation on a copper-substituted hexaaluminate catalyst: A facile process for treating low concentration acid gas
High temperature H2S selective oxidation on a copper-substituted hexaaluminate catalyst: A facile process for treating low concentration acid gas
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DOI：
10.1016/j.cclet.2021.07.053
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发表时间：
2021-07
影响因子：
9.1
通讯作者：
Xinrui Xu;Ganggang Li;Fenglian Zhang;Guoxia Jiang;Z. Hao
中科院分区：
文献类型：
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作者：
Xinrui Xu;Ganggang Li;Fenglian Zhang;Guoxia Jiang;Z. Hao
H2S选择性催化氧化技术具有工艺操作简单、投资少等优点，是一种很有前景的低浓度酸性气体处理方法。然而，由于放热反应引起的固定反应床温度升高，不可避免地出现诸如大量SO2形成和催化剂失活的不良结果。因此，迫切需要在宽的操作温度范围内，特别是在高温范围内具有高活性的催化剂。本文制备了一系列铜取代六铝酸盐催化剂（LaCux，x= 0，0.5，1，1.5，2，2.5），并在高温条件下（300-550°C）对H2S选择氧化反应进行了研究。LaCu 1催化剂具有良好的还原性能和良好的孔结构，具有优良的催化性能和稳定性。此外，还提出了两条消除尾气中残留H2S和SO2的简易深加工路线。
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 SO2and 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 (LaCux,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°C). The LaCu1catalyst 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 SO2in the tail gas.