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OALib Journal期刊
ISSN: 2333-9721
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活性炭负载的钴基催化剂催化费托合成反应一步合成C1-C18混合醇:二氧化硅助剂的作用
DOI: 10.1016/S1872-2067(14)60252-7, PP. 355-361
Keywords: 钴催化剂,高碳醇,二氧化硅助剂,费托合成,碳化钴
Abstract:
？采用费托合成反应以及X射线衍射、H2程序升温还原、CO脉冲化学吸附和N2物理吸附表征手段研究了SiO2助剂对活性炭负载的钴基催化剂上生成C1-C18混合醇的影响.结果表明,SiO2的添加抑制了钴物种的还原,但提高了钴物种的分散度,同时抑制了金属钴颗粒在反应过程中的团聚,从而显著提高了催化剂的活性.适量SiO2的添加促进了碳化钴的生成,从而提高了总醇选择性.重要的是,通过SiO2抑制钴物种的还原,导致大量二价钴物种的生成,从而有助于CO插入到碳链中间体中而使高碳醇容易生成.
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