Fischer-Tropsch synthesis kinetics determination over Co-Ru/Al2O3-Zr Catalysts

Intrinsic kinetics of Fischer-Tropsch process over Co-Re/Zr-Al2O3 catalyst for production of mid-distillates from syngas in a fixed bed reactor is studied. Experimental design based on Tagochi method was performed. The temperature, pressure, H2/Co ratio and feed flow rate were varied from 200-240 oC, 15-30 bars, 1-2.5 and 0.5-1.5 nL/g car.hr, respectively. To present a kinetics model several mechanisms were considered. Using rate determining step method and LHS method rate equation were determined. Rate constants and equilibrium constants were calculated and kinetics model were find out. Rate equation as r = (k_4 K_1 K_2 K_3 P_CO P_H2)/〖(1 K_1 P_CO)〗^2 ¡ using Hydrogen assisted CO dissociation mechanism as the best equation is selected and the activation energy using Arrhenius equation is determined as 184.28 kj/mol.