Fischer–Tropsch study over impregnated silica-supported cobalt–iron nanocatalyst

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• 作者：Mohammad Abdollahi ; Hossein Atashi…
• 关键词：Fischer–Tropsch synthesis ; Co–Fe catalyst ; Kinetics modeling ; Light olefins
• 刊名：Journal of the Iranian Chemical Society
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：14
• 期：1
• 页码：245-256
• 全文大小：
• 刊物主题：Analytical Chemistry; Inorganic Chemistry; Physical Chemistry; Biochemistry, general; Organic Chemistry;
• 出版者：Springer Berlin Heidelberg
• ISSN：1735-2428
• 卷排序：14

文摘

Fischer–Tropsch reaction was carried out over the impregnated 60 %Co/40 %Fe/90wt%SiO₂/1.5wt%K catalyst in a fixed-bed micro-reactor over a range of operating conditions. Reaction rate expression on the basis of the Langmuir–Hinshelwood–Hougen–Watson type models for the FT reactions was derived. Here seven kinetic expressions for CO consumption were proposed, and interaction between adsorption CO and dissociated adsorption hydrogen as the controlling step gave the most conceivable kinetic model. According to one factor at a time method, the product distributions in FT synthesis are found to be strongly influenced by temperature and pressure, and maximum hydrocarbon selectivity C₂–C₃ light olefins are obtained at 260 °C and 8 bar. The activation energy for CO consumption is calculated as 106.2 kJ mol−1.