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In this research, the solution combustion method was used to synthesize non-noble catalysts including copper-cerium (CuCe) and copper-cerium-iron (CuCeFe) mixed-oxides for catalytic combustion of methane. The effects of Cu contents (5, 10 and 15 wt%) and Fe addition were investigated. The synthesized catalysts were characterized by XRD, N 2 -physis...
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... XRD patterns of all catalysts ( figure 1) showed the peaks at 28.3 o , 32.8 o , 47.3 o , and 56.2 o , corresponding to the face-centered cubic (FCC) fluorite type oxide structure of CeO2. For a series of CuCe catalyst, the characteristic peaks at 35.5° and 38.7° which are specified to CuO (002) and CuO (111) planes (JCPDS 34-394) which appeared only for 10 and 15CuCe samples. ...
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Citations
Carbon monoxide (CO) and nitric oxide (NO) are widely present in industrial flue gas such as sintering coking, and automobile exhaust gas. Their long-term presence in the atmosphere will endanger human health and the ecological environment. CO catalytic oxidation is a widely used CO removal technology, and catalytic reduction of NO by CO is considered to be one of the feasible technologies for collaborative removal of CO and NO in the flue gas containing both NO and CO, such as sintering and coking flue gas. Compared with expensive precious metal catalysts, transition metal composite oxides CuO-CeO2 catalysts show good catalytic activity and stability in both CO catalytic oxidation and NO catalytic reduction by CO applications. Therefore, this article focuses on summarizing the reaction mechanism of CuO-CeO2 catalysts in CO catalytic oxidation and NO catalytic reduction by CO and the key influencing factors of activity, such as Cu:Ce ratio, synthetic methods, calcination temperature, CeO2 shape, O2 content, etc., the influence of the above factors on the surface active sites of CuO-CeO2 catalyst, surface oxygen vacancies, the interaction between Cu and Ce redox pairs, and the specific surface area of the catalyst are briefly described. The future research work is prospected to provide theoretical guidance for the optimization of CuO-CeO2 catalyst and the promotion of its industrial application.
