Influence of high ash Indian coals in fluidized bed gasification under different operating conditions

Coal gasification has been internationally accepted as one of the most viable and effective clean coal technology for power generation. Presently, the coal being produced in India is having high ash content and it is a major constraint for most of the commercial applications in process industries. The present paper deals with the variation of higher heating value (HHV) of the product gas and carbon conversion with different inherent properties under different operating conditions in fluidized bed gasification. It has been observed that HHV of product gas increases with volatile mater, fixed carbon and temperature, whereas, mineral matter, air and steam show decreasing effect on HHV. On the other hand, carbon conversion increases with volatile matter, air, steam and temperature. It has also been observed that mineral matter provides catalytic effect to a certain level for carbon conversion, whilst, decreasing trend has been observed with the fixed carbon.