摘要
采用浸渍法制备了一系列钌基催化剂,以水煤气变换为探针反应,采用XRD、TPR和TPD等手段研究了铈对Ru/-γAl2O3催化剂的改性机制。结果表明,铈的加入显著地提高了Ru/-γAl2O3催化剂的变换反应活性,增加了Ru/-γAl2O3催化剂的活性中心数,降低了催化剂的还原温度,增强了催化剂对H2O的吸附和活化作用。
A series of ruthenium-based catalysts were prepared by impregnation. Water-gas shift was selected as the reaction to evaluate the catalytic properties on catalysts. The influence of cerium on Ru/γ-Al2O3 catalyst was investigated by XRD, TPR and TPD. The results indicate that the addition of cerium increases the catalytic activity and the numbers of active sites on Ru/γ-Al2O3 catalyst, decreases the reduction temperature of Ru/γ-Al2O3 catalyst, enhances the adsorption and activation of H2O on catalyst.
出处
《稀土》
EI
CAS
CSCD
北大核心
2005年第4期25-29,共5页
Chinese Rare Earths
基金
江西省自然科学基金资助项目(0220002)
关键词
铈
钌
水煤气变换
cerium
ruthenium
water-gas shift
