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Kinetic study of Fischer–Tropsch process on titania-supported cobalt–manganese catalyst
H. Atashi,F. Siami,A.A. Mirzaei,M. Sarkari 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.6
An active cobalt–manganese catalyst was prepared by co-precipitation method, and was also tested for hydrogenation of carbon monoxide to light olefins. The catalyst was characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and Brunauer–Emmett–Teller (BET) surface area techniques. The kinetic experiments on a well-characterized Co–Mn/TiO2 catalyst were performed in a fixed-bed micro-reactor, and were also conducted in a temperature range of 190–280 8C, pressure range of 1–10 bar, H2/CO feed ratio (mol/mol) range of 1–3 and a space velocity range of 2700–5200 h1. Two kinetic expressions based on Langmuir–Hinshelwood–Houngen–Watson (LHHW) mechanism were observed to fit the experimental data accurately for Fischer–Tropsch synthesis reaction. The kinetic parameters were estimated with non-linear regression method. Activation energies obtained were 35.131 and 44.613 kJ/mol for optimal kinetics models.