Effects of CeO2 on structure and properties of Ni-Mn-K/bauxite catalysts for water-gas shift reaction
来源期刊:JOURNAL OF RARE EARTHS2008年第3期
论文作者:YE Binghuo WEI Kemei JIANG Lilong
Key words:impregnated; water-gas shift; bauxite; CeO2; rare earths;
Abstract: Multiple-metal catalysts (Ni-Mn-Ce-K/bauxite) for Water-Gas Shift (WGS) reaction were prepared by impregnation, and the catalytic structure and properties were investigated by N2 physical, XRD, H2-TPR, and CO-TPD. The results indicated that the addition of 7.5% CeO2 improved the activity of the WGS reaction obviously, and also increased the specific surface area and pore volume of the catalysts. The addition of CeO2 decreases the reduction temperature, enhanced the adsorption and activation of H2O, and improved the adsorption content of CO. Besides, active sites were not changed and the number of active sites on catalysts did not increase obviously.
YE Binghuo1,WEI Kemei1,JIANG Lilong1
(1.National Engineering Research Center For Chemical Fertilizer Catalysts, Fuzhou University, Fuzhou 350002, China)
Abstract:Multiple-metal catalysts (Ni-Mn-Ce-K/bauxite) for Water-Gas Shift (WGS) reaction were prepared by impregnation, and the catalytic structure and properties were investigated by N2 physical, XRD, H2-TPR, and CO-TPD. The results indicated that the addition of 7.5% CeO2 improved the activity of the WGS reaction obviously, and also increased the specific surface area and pore volume of the catalysts. The addition of CeO2 decreases the reduction temperature, enhanced the adsorption and activation of H2O, and improved the adsorption content of CO. Besides, active sites were not changed and the number of active sites on catalysts did not increase obviously.
Key words:impregnated; water-gas shift; bauxite; CeO2; rare earths;
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