催化学报 ›› 2015, Vol. 36 ›› Issue (2): 252-259.DOI: 10.1016/S1872-2067(14)60179-0

• 论文 • 上一篇    

费托合成:SiO2和Al2O3负载的Co2C催化剂的表征和评价

裴彦鹏a,c, 丁云杰a,b, 臧娟a,c, 宋宪根a,c, 董文达a,c, 朱何俊a, 王涛a, 陈维苗a   

  1. a 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;
    b 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;
    c 中国科学院研究生院, 北京100049
  • 收稿日期:2014-10-24 修回日期:2014-11-16 出版日期:2015-01-21 发布日期:2015-01-21
  • 通讯作者: 丁云杰

Fischer-Tropsch synthesis: Characterizing and reaction testing of Co2C/SiO2 and Co2C/Al2O3 catalysts

Yanpeng Peia,c, Yunjie Dinga,b, Juan Zanga,c, Xiangen Songa,c, Wenda Donga,c, Hejun Zhua, Tao Wanga, Weimiao Chena   

  1. a Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    b State Key Laboratory for Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    c University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2014-10-24 Revised:2014-11-16 Online:2015-01-21 Published:2015-01-21

摘要:

采用CO碳化SiO2和Al2O3负载的Co(NO3)2的方法制备了SiO2和Al2O3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Co2C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.

关键词: 负载型碳化钴, 费托合成, 醇, 表面活性位

Abstract:

SiO2- and Al2O3-supported Co2C 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 SiO2- and Al2O3-supported Co2C catalysts could be successfully obtained but sufficient carburization time was required. All of the as-prepared supported Co2C catalysts exhibited activity and selectivity towards alcohols. It is considered that surface metallic Co species contributed to the activity, surface Co2C species were responsible for the formation of alcohols, and bulk Co2C species were inert during the F-T reaction.

Key words: Supported cobalt carbide, Fischer-Tropsch synthesis, Alcohols, Surface sites