where, F: catalyst improvement factor since Yates' kinetics proposed in 1991; In the FT section, the syngas is pressurized before entering the FT reactor. RPlug is chose to simulate the multi-tubular fixed-bed reactor for FT in Aspen Plus. Yates' kinetics is used for the overall consuming rate of CO (6 )* ), while the Anderson-Schulz-Flory mechanism can be used to estimate the distribution of FT products. Since the properties of hydrocarbons (HCs) are similar, .we employ four reactions (R1~R4) to represent the whole range of HCs for simplification during the simulation as the Table . CO2 is reported not to react on the Cobaltbased catalyst and can be regarded as an inert gas in the FT reaction. Based on the information mentioned above, we used the kinetic information in Rplug model.