应用化学2001，Vol.18Issue(1)：25-28,4.
钾促进钴钼耐硫CO变换催化剂的XPS和TPR表征
The XPS and TPR Characterization of Sulfur-resisted Catalysts for Water Gas Shift Promoted by K2CO3
摘要
Abstract
The XPS, TPR techniques were used to study the promotion effectof K2CO3 to the supported catalyst Co-Mo-K-O/γ-Al2O3 for water gas shift. The XPS results show that the amount of low valence molybdenum and S2- increases with increase of the content of K in sulfured catalyst, and (S-S)2- is suppressed. It is found that keeping the ratio (Mo4++Mo5+)/Mo6+ at 0.8～1 level and remaining more S2- species on the catalyst are in favor of the improvement of the catalytic activity at low temperature. Two hydrogen-adsorped peaks of TPR, namely α and β peaks, which can be ascribed to Mo6+→Mo5+ and Mo5+→Mon+(n=4,3,2) reduction processes respectively, appear both at sulfured state and functioning state. The experiment results indicate that there is a close relation between the altitude of the peaks and the activity of the catalyst at low temperature.关键词
Co-Mo/Al2O3催化剂,钾助剂,水煤气变换分类
化学化工引用本文复制引用
林仁存,杨意泉,袁友珠,魏光,王琪,樊金红,戴深峻..钾促进钴钼耐硫CO变换催化剂的XPS和TPR表征[J].应用化学,2001,18(1):25-28,4.基金项目
厦门大学基金项目 （）
