气体热载体法煤热解动力学研究

Kinetic study on coal pyrolysis with gas heat carrier method

采用热重分析和气体热载体实验考察了准东煤和神木煤的热解动力学特性,并根据热解动力学模型确定动力学参数。随热解温度的升高,反应停留时间对半焦收率及半焦挥发分的影响逐渐减小;煤热解活化能与反应停留时间、煤粒径大小均相关。研究结果对于煤热解工艺工业化具有参考意义。

This paper probes into the pyrolysis kinetic characteristics of Zhundong coal and Shenmu coal with thermogravimetric analysis method and gas heat carrier experiment, and determines the kinetic parameters by established pyrolysis kinetic model. It finds that the impact of reaction residence time on semi-coke yield and its volatile matter decreases with increasing pyrolysis tempera- ture ; the pyrolysis activation energies of coals are related to reaction residence time and coal particle size. The study results have great significance on industrialization of coal pyrolysis process.