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عنوان مقاله [English]
Fischer-Tropsch process is one of the developing processes in the world, and especially in Iran, for the conversion of synthesis gas into paraffin and olefinic products. The purpose of this study was to investigate the effect of feed temperature and pressure on hot spot formation by means of reactor simulation. The simulation of GTL process fixed bed reactor is carried out by Matlab software package using computational fluid dynamics. Also, the kinetics proposed for Fischer-Tropsch process in the literature has been compared. Two-dimensional modeling was performed and flow regime within the reactor was considered laminar. The finite volume method was used to solve the equations. The results of the process modeling suggest that hot spot formation is more possible in bed primary section because of reaction concentration. Increasing reactor temperature resulted in an enhancement of reactant conversion and product yield. Raising feed temperature causes hot spot temperature to increase. According to the modeling results, the optimum temperature and pressure are equal to 570 K and 20 bar respectively. It was also found that increasing pressure and consequently temperature increased C7+ product yield, which in turn will increase the production of linear hydrocarbons.