Effects of CeO_2 on structure and properties of Ni-Mn-K/bauxite catalysts for water-gas shift reaction  

作　　者：江莉龙 叶炳火 魏可镁 

机构地区：[1]National Engineering Research Center For Chemical Fertilizer Catalysts, Fuzhou University

出　　处：《Journal of Rare Earths》2008年第3期352-356,共5页稀土学报（英文版）

基　　金：the Natural Science Foundation of Fujian Province of China (U0650011);the "Little Invention and Little Creation" of Fu-jian Province Innovation and Development Committee of China

摘　　要：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 H2O2, 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.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 H2O2, 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.

关 键 词：IMPREGNATED water-gas shift BAUXITE CEO2 rare earths 

分 类 号：O643.32[理学—物理化学]