CO2 Gasification Kinetics of Semi-char from Straw Fast Pyrolysis

The reactivity of fast pyrolysis straw semichar in CO2 atmosphere was studied by TGA. The semichar were got at 400,500,600 ℃ with straw fast pyrolysis system, and the gasification reaction were carried out at 850,900,950,1 000 ℃ in CO2 atmosphere, respectively. The results show that as the pyrolysis temperature increases, the reactivity of semi-char in CO2 atmosphere has a decreased trend. The random pore model was applied to describe the gasification behavior and kinetics parameters．The fitted curve could describe the gasification reaction ratio trend well and corresponded to the experimental data.