Preprint Article Version 1 NOT YET PEER-REVIEWED

A Comprehensive Kinetic Model of Fischer-Tropsch Synthesis over Supported Cobalt Catalyst

Version 1 : Received: 3 March 2017 / Approved: 6 March 2017 / Online: 6 March 2017 (06:47:14 CET)

How to cite: Jalilzadeh, R.; Moqadam, M. A Comprehensive Kinetic Model of Fischer-Tropsch Synthesis over Supported Cobalt Catalyst. Preprints 2017, 2017030027 (doi: 10.20944/preprints201703.0027.v1). Jalilzadeh, R.; Moqadam, M. A Comprehensive Kinetic Model of Fischer-Tropsch Synthesis over Supported Cobalt Catalyst. Preprints 2017, 2017030027 (doi: 10.20944/preprints201703.0027.v1).

Abstract

A comprehensive kinetic model of the Fischer-Tropsch synthesis (FTS) is developed in a fixed bed reactor under operating conditions (temperature, 230–235°C, pressure, 20–25 bar, gas hourly space velocity, 4000–5000 cm3(STP)/h/gcatalyst ,H2/CO feed molar ratio, 2.1) over a Co based catalyst. Reaction rate equations based on Eley-Rideal (ER) type model for initiation step and Langmuir-Hinshelwood-Hougen-Watson (LHHW) type model for propagation and termination steps of the FTS reactions have been considered and the readsorption of olefins were taken into account. The model that was reported in the literature was modified in order to explain many significant deviations from the ASF distribution. Optimum parameters have been obtained by Genetic Algorithms (GA). The calculated activation energies to produce n-paraffins and 1-olefins were in the range of 82.24 to 90.68 kJ/mol and 100.66 to 105.24 kJ/mol, respectively. The hydrocarbon distribution in FTS reactions was satisfactorily predicted particularly for paraffins.

Subject Areas

Fischer-Tropsch synthesis; kinetics model; cobalt based catalyst

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