APPLICATION OF MONTE-CARLO SIMULATION OF CHAR GASIFICATION IN A FLUIDIZED-BED GASIFIER

A simulation of the allothermal steam gasification of coal in fluidize d beds is presented. The model is basing on the Monte-Carlo simulation of stochastic movements of coal particles in a fluidized bed and the simultaneous calculation of the particle's mass loss due to the gasifi cation reaction. All actual process and gasification data such as reac tion rate, degree of conversion, product gas evolution etc. are collec ted related to the particle's location in the fluidized bed. The evalu ation of these data allows to obtain overall process parameters e.g. r esidence times, mass contents of the fluidized bed etc. as well as pro files of certain parameters as there are single product gas concentrat ions, reaction rate etc. as a function of the bed dimensions. A compar ison of the results from simulation and experiment is drawn showing a good agreement of both.