Thermal decomposition and cobalt species transformation of carbon nanotubes supported cobalt catalyst for Fischer-Tropsch synthesis

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• 作者：Jing LÜ ; Chengdu Huang ; Suli Bai ; Yunhui Jiang ; Zhenhua Li ; ^{zhenhua@tju.edu.cn}
• 关键词：carbon nanotubes ; cobalt species ; Fischer-Tropsch synthesis ; thermal decomposition
• 刊名：Journal of Natural Gas Chemistry
• 出版年：2012
• 出版时间：January 2012
• 年：2012
• 卷：21
• 期：1
• 页码：37-42
• 全文大小：498 K

文摘

The effect of calcination condition on the cobalt species and Fischer-Tropsch synthesis (FTS) was studied. It was found that higher calcination temperature resulted in decreased FTS activities because CNTs were consumed by oxidation in air at temperature higher than 230¡ãC. Cobalt species went through transformation from Co3O4 to metallic Co in Ar by autoreduction at temperature over 500¡ãC. The autoreduction route might be Co₃O₄¡úCoO¡úCo or Co₃O₄¡úCo₂C¡úCo. Reduction at temperature higher than 500¡ãC also resulted in decreased FTS activities due to the methanation of CNTs in hydrogen.