费托合成：SiO2和Al2O3负载的Co2C催化剂的表征和评价

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....

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Bibliographic Details
Published in催化学报 Vol. 36; no. 2; pp. 252 - 259
Main Author 裴彦鹏 丁云杰 臧娟 宋宪根 董文达 朱何俊 王涛 陈维苗
Format Journal Article
LanguageChinese
Published 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 2015
中国科学院研究生院，北京100049%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
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%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
Subjects
表面活性位
负载型碳化钴
费托合成
醇
Supported cobalt carbide
Fischer-Tropsch synthesis
Surface sites
负载型碳化钴
醇
费托合成
表面活性位
Alcohols
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ISSN0253-9837
1872-2067
DOI10.1016/S1872-2067(14)60179-0

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Summary: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.
Bibliography: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.
Yanpeng Pei;Yunjie Ding;Juan Zang;Xiangen Song;Wenda Dong;Hejun Zhu;Tao Wang;Weimiao Chen;Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences;University of Chinese Academy of Sciences;State Key Laboratory for Catalysis, Dalian Instit
ISSN:0253-9837
1872-2067
DOI:10.1016/S1872-2067(14)60179-0