Abstract
A New Mexico sub-bituminous coal was gasified with steam and oxygen in a 15.2 cm fluidised bed reactor at a pressure of 790 kPa and average bed temperatures between 875 and 990 C. Material balances were obtained for total mass and major elements (C,H,O,N,S). A simple representation of coal pyrolysis has been added to a previously developed model of gasification and combustion; the resulting model provides good correlations of measured carbon conversion, gas production rates and gas compositions. Approximations that can be used to estimate S conversion and the split between H/sub 2/S and COS in the product gas have also been developed.
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