Measurement of CO2 Gasification Reactivity for High Temperature Pyrolyzed Coal Chars by Temperature-Programmed Thermogravimetry

The slow and rapid coal char samples were prepared at elevated temperatures ranging from(1 223 K) to 1 773 K by temperature-programmed and isothermal pyrolysis. Investigations were performed to determine the effects of heating rate,pyrolysis temperature,and pyrolysis rate on the chars,CO_2 gasification reactivity as measured by temperature-programmed thermogravimetry.Reaction kinetics of slow(pyrolysis) at 1 573 K under programmed heating was obtained and compared to that of the isothermal case.The CO_2 gas...