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http://dx.doi.org/10.9713/kcer.2017.55.2.156

Low Temperature CO Oxidation over CuO Catalyst Supported on Al-Ce Oxide Support  

Park, Jung-Hyun (Korea Research Institute of Chemical Technology, Carbon Resource Institute, Greenhouse Gas Resources Research Group,)
Yun, Hyun Ki (Industry-University Cooperation Foundation, Chungbuk National University)
Shin, Chae-Ho (Department of Chemical Engineering, Chungbuk National University)
Publication Information
Korean Chemical Engineering Research / v.55, no.2, 2017 , pp. 156-162 More about this Journal
Abstract
CuO(x)/0.3Al-0.7Ce catalysts with different CuO loadings (x = 2~20 wt%) were prepared by impregnation method and investigated the effects of CuO loadings on the low temperature CO oxidation. Of the used catalysts, the CuO(10)/0.3Al-0.7Ce catalyst showed the highest catalytic performance in the absence or presence of water vapor. In the presence of water vapor, the catalytic performance was drastically decreased, with a temperature of 50% CO conversion ($T_{50%}$) shifted to higher temperature by $50^{\circ}C$ compared to the those in dry conditions because of the competitive adsorption of water vapor on the active sites. The copper metal surface area calculated from $N_2O$-titration analysis and the oxygen capacity from CO-pulse experiments were increased with the CuO loadings and showed a maximum at 10 wt%CuO/0.3Al-0.7Ce catalyst. These trends are in good agreement with the tendency of $T_{50%}$ of the catalysts. From these characteristic aspects, it could be deduced that the catalytic performance was closely related to the oxygen capacity and the copper metallic surface area.
Keywords
CuO/AlCe catalyst; CO oxidation; Copper surface area; Oxygen capacity;
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