Fischer-Tropsch synthesis: Activity of metallic phases of cobalt supported on silica

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• 作者：Muthu Kumaran Gnanamani ; Gary Jacobs ; Wilson D. Shafer ; Burtron H. Davis
• 关键词：Hcp cobalt ; Fcc cobalt ; XRD ; Fischer&ndash ; Tropsch synthesis
• 刊名：Catalysis Today
• 出版年：2013
• 出版时间：15 October, 2013
• 年：2013
• 卷：215
• 期：Complete
• 页码：13-17
• 全文大小：958 K

文摘

By using different catalyst pretreatments, silica supported cobalt catalysts were activated to produce either hcp or fcc cobalt metal particles, as verified by XRD. H₂-TPR and pulse re-oxidation experiments show a higher dispersion of cobalt for the catalyst containing the hcp metallic phase compared to the fcc phase. Cobalt containing hcp metallic phase has shown higher CO conversion on a catalyst weight basis and less methane selectivity compared to fcc containing catalysts under similar reaction conditions. Both hcp and fcc phases of cobalt are stable during the Fischer-Tropsch (FT) synthesis.