Experimental study and characterization of coal gasification in a circulating fluidized bed gasifier

In this study Indian coal material were used for the experiments and presents the results from gasification of Indian sub-bituminous coal in a (4.0 m tall X 0.75 m diameter) circulating fluidized bed gasifier. All the experiments were performed at the temperature range 700-800 °C. A number of experiments were carried out to see the effect of different parameters like coal feed rate, coal particle size on the quality of syngas production during the gasification of coal in circulating fluidized bed gasifier. All the above parametric study performed on three different superficial velocities of 5, 6 and 7 m/s. During the experiments coal feed rate was in the range of 0.036-0.073 g/s and coal particle size was varied from 80-212 mm respectively. With this experiment it is found that with increasing the superficial velocity, the solid circulation rate of material increases as well as with increases in solid inventory. It is observed that coal particle size also affect the heat transfer coefficient means it is decreases with increase the size of coal particle.