Kinetic Model of CO2 Conversion to Liquid Fuels by Precipitated Iron Catalyst

In this paper, the mechanism of hydrogenation of carbon dioxide to the heavy hydrocarbons through Fischer-Tropsch synthesis iron catalysts is considered for the development of suitable kinetic model. For this purpose, three kinetic models for carbon dioxide hydrogenation are developed using Langmuir-Hinshelwood-Hougen-Watson (LHHW) method based on basic reactions of Fischer-Tropsch Synthesis and water-gas shift reaction. The kinetic parameters in these models are obtained using empirical results. The results show that the reaction of hydrogenation of carbon dioxide is limited by reaction between surface species of adsorbed carbon monoxide and hydrogen. The results show that the activation energy for hydrocarbon growth in CO2 hydrogenation is higher than Fischer-Tropsch synthesis (100 kJ/mol).