EFFECT OF ATMOSPHERE ON THE REGASIFICATION KINETIC PARAMETERS OF CHAR PARTIALLY GASIFIED FROM SHENMU COAL
气氛对神木煤部分气化煤焦再气化动力学参数的影响

A series of SM (Shenmu) partially gasified chars were prepared in a micro-scale fixed-bed. The regasification kinetics of these partially gasified chars for different atmosphere was analyzed by a thermobalance. Results show that the regasification kinetic parameters of partially gasified chars are related with gasification conversion of coals. For gasification in steam, the regasification activation energy, preexponential factor and effect of the pressure of steam on the gasification rate decrease with the increase of gasification conversion, but for gasification in CO_2, the regasification activation energy and preexponential factor increase, the effect of the pressure of CO_2 on the gasification rate decreases. It is important to point out that the compensation effect exists between activition energy of partially gasified chars and preexponential factor during gasification regardless of atmospheres.