| 费托合成:SiO_2和Al_2O_3负载的Co_2C催化剂的表征和评价 |
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| 引用本文： | 裴彦鹏,丁云杰,臧娟,宋宪根,董文达,朱何俊,王涛,陈维苗.费托合成:SiO_2和Al_2O_3负载的Co_2C催化剂的表征和评价[J].催化学报,2015(2):252-259. |
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| 作者姓名： | 裴彦鹏 丁云杰 臧娟 宋宪根 董文达 朱何俊 王涛 陈维苗 |
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| 作者单位： | 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; 中国科学院研究生院，北京100049;2. 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;3. 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 |
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| 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.
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| 关 键 词： | 负载型碳化钴 费托合成 醇 表面活性位 |
Fischer-Tropsch synthesis:Characterizing and reaction testing of Co2C/SiO2 and Co2C/Al2O3 catalysts |
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| 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 tempera‐ture‐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 contribut‐ed to the activity, surface Co2C species were responsible for the formation of alcohols, and bulk Co2C species were inert during the F‐T reaction. |
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| Keywords: | Supported cobalt carbide Fischer-Tropsch synthesis Alcohols Surface sites |
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