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锰助剂对F-T合成Co/Al2O3催化剂反应性能的影响
引用本文:张俊岭,任杰,陈建刚,孙予罕.锰助剂对F-T合成Co/Al2O3催化剂反应性能的影响[J].物理化学学报,2002,18(3):260-263.
作者姓名:张俊岭  任杰  陈建刚  孙予罕
作者单位:State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001
基金项目:国家重点基础研究发展规划(G1999022402)资助项目~~
摘    要:采用程序升温和原位红外技术对锰改性Co/Al2O3催化剂进行了表征,并与CO加氢反应活性和选择性进行关联.结果表明,添加适量锰能够增加反应活性,提高烃选择性,抑制甲烷及低碳烃的生成. XRD和FT IR结果表明锰助剂的添加能够促进活性相的分散,促进桥式CO吸附位数的增加. H2 TPD表明锰的加入可增加低温吸附氢量,但吸附氢量随锰含量的增加而减少.钴基催化剂的费托合成反应性能可以用锰添加导致的CO吸附态物种的变化来解释.

关 键 词:费-托合成  Co/Al2O3催化剂  锰助剂  载体  表征  
收稿时间:2001-07-17
修稿时间:2001年7月17日

Effect of Manganese Promoter on the Performance of Co/Al2O3 Catalysts for Fischer Tropsch Synthesis
Zhang Jun Ling,Ren Jie,Chen Jian Gang,Sun Yu Han.Effect of Manganese Promoter on the Performance of Co/Al2O3 Catalysts for Fischer Tropsch Synthesis[J].Acta Physico-Chimica Sinica,2002,18(3):260-263.
Authors:Zhang Jun Ling  Ren Jie  Chen Jian Gang  Sun Yu Han
Institution:State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001
Abstract:The Mn modified cobalt catalysts for Fischer Tropsch(F T) synthesis were characterized and tested by TPR, H2 TPD, FT IR, and CO hydrogenation. It was found that a suitable addition of manganese could improve the catalytic activity and selectivity and suppress the methane and C2 4 hydrocarbons. XRD and FT IR results showed that the presence of Mn could improve the dispersion of active phases and favor the formation of bridged type adsorbed CO. A small amount of Mn could increase the uptake of hydrogen, but excess of manganese might decrease the uptake of hydrogen. Such a shift of the reaction performances was related to the change of adsorbed CO species.
Keywords:Foscjer  Tropsch(F  T) synthesis    Co/Al2O3 catalysts    Mn promoter    Supporter                      Characterization
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