Catalytic gasification kinetics of high metamorphosed anthracites with steam by thermogravity using black liquor of paper pulp plant as catalyst

Using black liquor (BL) of paper pulp plant as catalyst, the steam gasification kinetics of four high metamorphosed anthracites were investigated by isothermal thermo-gravimetric analysis under ambient pressure. The relationships of coal conversion (x) versus reaction time (t) were obtained from 750°C to 950°C under reaction control. The shrinking core model was modified by catalyst effective factor. The modification shrinking core model and the modification volumetric model were used to well correlate the relationship between x and t. Therefore, the reaction rate constants, the reaction activation energy (Ea) and the pre-ex-ponential factor were obtained. The Ea, ranging from 112.838 kJ/mol-204.566 kJ/mol was estimated by this study. Compared with the k, of Na2CO3, those of BL were higher except for Yongan Jiashai coal which has the highest ash concentration.