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| Study on water gas shift reaction with Au/CeO2 catalyst under oxygen conditions |
(1. School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang， Jiangsu 212013, China； 2. National Engineering Laboratory for Mobile Source Emission Control Technology, Tianjin 300300, China)
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Abstract The Au/CeO2 catalyst with 3% Au loading was prepared by depositionprecipitation method. The physicochemical properties were investigated by characterization methods, and the catalytic activity of water gas shift reaction (WGSR) was investigated by fixedbed reactor experiments. The results show that the Au element is uniformly dispersed on the surface of carrier, which can improve the redox performance and CO adsorption performance of the catalyst for enhancing the activity of the catalyst. When the reaction temperature is 300 ℃, the conversion of CO in the WGSR experiment is increased by 56.0%. O2 can promote the decomposition of carbonate on the surface of catalyst and restore the active site of catalyst, which significantly increases the conversion of CO at low temperature. When the reaction temperature are 200 and 250 ℃, the conversion rates are increased by 15.0% and 17.5%, respectively.
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Received: 26 August 2019
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