Fischer-Tropsch synthesis in a microchannel reactor using mesoporous silica supported bimetallic Co-Ni catalyst: Process optimization and kinetic modeling

Abstract Fischer-Tropsch (FT) synthesis was carried out in a microchannel reactor under a wide range of operating conditions ( e.g. 280–320 °C, 10–50 bar, H 2 /CO 1–3) using a mesoporous supported bimetallic Co-Ni catalyst. The response surface methodology (RSM) and central composite design (CCD) were employed in determining the optimal condition for light olefin production. Three key operational parameters ( e.g. syngas ratio, operational pressure, and reaction temperature) were chosen as independent variables in CCD. A new comprehensive kinetic model assuming separate rate of C 1 , C 2 , C 3 and C n ( n  ≥ 4) by coupling Langmuir-Hinshelwood-Hougen-Watson (LHHW) carbide mechanistic approach together with thermodynamic correction is capable of representing olefin-to-paraffin ratio (O/P ratio) and product distribution at experimental conditions in this microchannel reactor.

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