Mathematic Simulation of a TubeShell Type FixedBed Reactor for FischerTropsch Synthesis

Based on the lumping theory and the kinetics model of the eggshell Cobaltbased catalyst, the one dimensional pseudohomogeneous model of the tubeshell type fixedbed reactor for FischerTropsch synthesis was developed. The simulated operating parameters including the profiles of the catlystbed temperature, CO conversion, outlet composition, mass fraction of C+5 and the space time yield were consistent well with the practical data. Effects of the reactor inlet temperature, space velocity, operating pressure and the boiling water temperature on the reaction results were studied. It demonstrated that the increase of the inlet temperature, operating pressure and the boiling water temperature enhanced the catalystbed temperature, CO conversion and the space time yield of C+5 while decreased the mass fraction of C+5. The increase of space velocity resulted in the decrease of the catalystbed temperature and CO conversion as well as the increase of the mass fraction and space time yield of C+5.