DEVELOPMENT OF MODELS FOR SIMULATION OF FLUIDIZED BED REACTOR FOR COAL GASIFICATION
A model describing the steady state behaviour of a fluidized bed reactor for coal gasification has been developed. The model was developed based on the principle of conservation of mass and the hydrodynamics specifications of Kunii and Levenspiel was adopted for the fluidized bed reactor models. The reaction kinetics of the gasification reactions were obtained from literature. The models consist of eight (8) ordinary differential equations which were integrated numerically using the fourth order Runge-Kutta algorithm implemented in MATLAB. The results obtained compared reasonably well with literature data with a percentage deviation ranging from -0.2% to 8.8%. Simulation of model at various operating parameters gave the optimum yield at 1 bar total pressure, 1135K temperature, 0.0257m bubble diameter and 0.0301m/s superficial velocity. Sensitivity analysis showed that the superficial velocity, bubble diameter, temperature and pressure are some of the process variables that affect the yields of synthesis gas (CO and H2), carbon (iv) oxide (CO2), and methane (CH4).