THERMODYNAMIC ANALYSIS OF FISCHER-TROPSCH POLYMERIZATION USING EQUATION OF STATE AND 𝚽−𝚽MODELING OF PHASES APPROACH, FOR PREDICTING PRODUCTION OF BIOFUELS.

The Fischer – Tropsch polymerization is study worldwide mainly due to possibility of production of alternative fuels from natural resources like waste of agricultural crops, wood harvesting, and even urban waste. So that, we aim study find an appropriate range of thermodynamics conditions would make feasible production of interested hydrocarbons (C8 – C12 for gasoline and kerosene of aviation, C13 – C17 for diesel, C18+ for waxes). Combine two different equations of state – Peng-Robinson and Soave-Redlich-Kwong, for thermodynamically describing of phases, and the Φ−Φ for phase equilibrium, we approached this situation as a minimization Gibbs Energy problem. After Carrying out simulations in the temperature ranging of 200 – 400 °C and pressure ranging of 10 – 30 bar, we found out this system favorable for alkanes and alcohol production as pressure increase and it is unfavorable to it as temperature increase.