担体对Fe-MnO催化剂CO加氢合成烯烃性能影响的TPSR表征  

TPSR CHARACTERIZATION OF THE SUPPORTED Fe-MnO CATALYSTS FOR CO HYDROGENATION

作　　者：徐龙伢[1] 王清遐[1] 蔡光宇[1] 陈国权[1] 黄家生[2] 徐奕德[2] 刘炳灿[2] 

机构地区：[1]中国科学院大连化学物理研究所,大连116023 [2]中国科学院大连化学物理研究所催化基础国家重点实验室,大连116023

出　　处：《Chinese Journal of Catalysis》1993年第6期420-425,共6页催化学报（英文）

基　　金：国家自然科学基金;大连化物所青年基金

摘　　要：考察了不同担体担载的Fe-MnO催化剂上CO加氢合成烯烃的反应。结果表明担体直接影响低碳烯烃选择性。通过对催化剂的CO,CO/H_2,C_2H_4等吸附的TPSR表征及催化剂表面CO加氢微观反应的研究,证明以碱性担体为基质的PBC催化剂具有强吸附CO能力,且生成的烯烃不易发生二次反应,因而PBC催化剂具有较高的烯烃选择性;以酸性担体为基质的PAC催化剂对CO为弱吸附,对H_2为较强吸附,且烯烃会发生强烈的二次反应(加氢、歧化),因而PAC催化剂不利于烯烃的生成;其它催化剂的结果介于PAC与PBC之间。It was shown by the results of CO hydrogenation on supported Fe--MnO catalysts that their selectivity for light olefins was affected by the support. TPSR characterization of CO, H2, CO/H2 and C2H4 adsorbed on catalyst was carried out. It was found that the catalyst PBC(Fe-MnO supported on basic support) was capable of stronger adsorbing CO and H2, and that the secondary reactions of C2H4 occurring over PBC catalyst surface was ambiguous, so PBC has high selectivity for light ole-fins; while PAC (Fe-MnO supported on acidic support) had only stronger adsorption for H2 and weaker adsorption for CO, meanwhile, the secondary reactions of C2H4 occurring over PAC were very strong, therefore, PAC was not fit for the production of light olefins.

关 键 词：担体 催化剂 一氧化碳 加氢 烯烃 

分 类 号：O623.12[理学—有机化学]