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Chemcial Industry and Engineering 2024, Vol. 41 Issue (6) :61-69    DOI: 10.13353/j.issn.1004.9533.20230512
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Study on SCR-CO performance of Ce modified OMS-2 catalysts
CAI Chen1, NING Shuying1, CHEN Jiayin1, FU Wei1, ZHOU Hao2, SU Yaxin1
1. School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China;
2. Changzhou Vocational Institute of Engineering, Jiangsu, Changzhou 213164, China

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Abstract The Ce-modified OMS-2 catalysts (Cex-OMS-2) were synthesized by one-step hydrothermal synthesis method, and its performance of selective catalytic reduction of NO by CO (SCR-CO) was evaluated in a fixed bed micro-reactor. The outcomes demonstrated that Ce0.08-OMS-2 achieved 100% NO conversion at 175—300 ℃ under the condition of 0.05%NO, 0.1%CO, 5%O2 and N2 as equilibrium gases, and the N2 selectivity reached a maximum of 93.2% at 175 ℃. By using XRD, BET, XPS, NH3-TPD and H2-TPR to characterize the catalysts, the effects of doping the active metal Ce on the physicochemical characteristics of OMS-2 catalysts were investigated. The results demonstrate that the improvement of the low-temperature activity of the Cex-OMS-2 catalyst is facilitated by lower agglomeration and crystallinity, larger specific surface area and pore volume, smaller average pore size, enhanced surface oxygen vacancies, increased Mn4+ concentration, and more Brønsted acid.
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Articles by authors
CAI Chen
NING Shuying
CHEN Jiayin
FU Wei
ZHOU Hao
SU Yaxin
KeywordsNOx   selective catalytic reduction   CO   OMS-2 catalyst   Ce     
Received 2023-06-04;
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CAI Chen, NING Shuying, CHEN Jiayin, FU Wei, ZHOU Hao, SU Yaxin.Study on SCR-CO performance of Ce modified OMS-2 catalysts[J]  Chemcial Industry and Engineering, 2024,V41(6): 61-69
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