费托合成：SiO2和Al2O3负载的Co2C催化剂的表征和评价  

Fischer-Tropsch synthesis: Characterizing and reaction testing of Co_2C/SiO_2 and Co_2C/Al_2O_3 catalysts

作　　者：裴彦鹏[1,2] 丁云杰[1,3] 臧娟[1,2] 宋宪根[1,2] 董文达[1,2] 朱何俊[1] 王涛[1] 陈维苗[1] 

机构地区：[1]中国科学院大连化学物理研究所洁净能源国家实验室,辽宁大连116023 [2]中国科学院研究生院,北京100049 [3]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,辽宁大连116023

出　　处：《催化学报》2015年第2期252-259,共8页

摘　　要：采用CO碳化SiO2和Al3O4负载的Co(NO3)2的方法制备了SiO2和Al3O4负载的Co2C催化剂,采用N2物理吸附、X射线衍射和H2-程序升温还原技术对催化剂进行了表征,并用于催化费托合成反应中.结果显示,需要较长碳化时间才可合成负载的Co2C催化剂;所制催化剂表现出CO加氢生成高碳醇的催化性能,其原因可能在于催化剂表面存在的金属Co物种使CO解离,表面Co物种有利于CO插入,从而导致醇的生成,但体相Co2C则不具有催化活性.SiO_2- and Al_2O_3-supported C02 C catalysts were prepared by carburizing supported Co precursors with CO.The catalysts were characterized by N2 physisorption,X-ray diffraction and H2 temperature-programmed reduction techniques,and evaluated by the Fischer-Tropsch（F-T） reaction.The results showed that SiO_2- and Al_2O_3-supported C02 C catalysts could be successfully obtained but sufficient carburization time was required.All of the as-prepared supported C02 C catalysts exhibited activity and selectivity towards alcohols.It is considered that surface metallic Co species contributed to the activity,surface C02 C species were responsible for the formation of alcohols,and bulk C02 C species were inert during the F-T reaction.

关 键 词：负载型碳化钴 费托合成 醇 表面活性位 

分 类 号：O643.36[理学—物理化学] TQ529.2[理学—化学]