以ZrO_2-Al_2O_3为载体的Co-Mo-K耐硫水煤气变换催化剂  

Co-Mo-K Sulfur tolerant Water Gas Shift Catalyst Supported on ZrO_2 Al_2O_3

作　　者：李玉敏[1] 耿云峰[1] 王日杰[1] 张继炎[1] 张鎏[1] 

机构地区：[1]天津大学化工学院催化科学与工程系,天津300072

出　　处：《应用化学》2000年第3期276-279,共4页Chinese Journal of Applied Chemistry

基　　金：中国石油化学工业总公司资助! (2 930 0 3)

摘　　要：采用沉淀法和浸渍法分别制备了 Zr O2 - Al2 O3复合载体和 Co- Mo- K耐硫变换催化剂 .研究了 Zr O2 对 Co- Mo- K耐硫变换催化剂活性及热稳定性的影响 .利用 XRD、BET、TG、XPS等手段对催化剂及其载体的结构、吸硫吸水性能和氧化还原性能进行了表征 .结果表明以 Zr O2 - Al2 O3代替传统的 γ- Al2 O3作为 Co- Mo- K耐硫变换催化剂的载体 ,可提高催化剂的活性 ,尤其是低温活性 ,并可改善催化剂的热稳定性、氧化还原性。The ZrO 2 Al 2O 3 supports were prepared by the decomposition precipitation meth od . The sulfur tolerant water gas shift Co Mo K catalysts were prepared by impregnation . The effects of ZrO 2 Al 2O 3 support on the activity and thermal stability of Co Mo K catalyst have been studied through activity evaluation. Using BET, XRD, TG and XPS techniques the structures of the supports and catalysts, the reduction property, sulfur and water adsorbabilities of the catalysts have been investigated. The results show that the ZrO 2 Al 2O 3 supported Co Mo K catalysts exhibit a high activity, especially at low temperatures. The conversion of CO could reach up to 72 8% at 250 ℃ over the Z8 catalyst, being 25% higher than that over γ Al 2O 3 supported catalyst. The thermal stability, water and sulfur adsorbab ility and reduction property of the catalyst are all found improved on the ZrO 2 Al 2O 3 support.

关 键 词：耐硫水煤气变换反应 Co-Mo-K催化剂 催化活性 

分 类 号：TQ426.83[化学工程] O643.36[理学—物理化学]