Behavior and Kinetics of Non-isothermal Pyrolysis of Coal at Different Heating Rates

作     者：Fan Junfeng Tian Bin An Xiaoxi Yin Mengmeng Qiao Yingyun Tian Yuanyu 

作者机构：Key Laboratory of Low Carbon Energy and Chemical Engineering Shandong University of Science and Technology State Key Laboratory of Heavy Oil Processing China University of Petroleum 

出 版 物：《China Petroleum Processing & Petrochemical Technology》 (中国炼油与石油化工（英文版）)

年 卷 期：2017年第19卷第3期

页      面：89-96页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0821[工学-纺织科学与工程] 081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the financial support from the National Natural Science Foundation of China(Grant Nos.21576293 and 21576294) 

主　　题：pyrolysis behavior kinetic analysis TG/DTG curves activation energy 

摘      要：Investigations on the pyrolysis and kinetic behaviors during pyrolysis of fossil fuel samples, such as coal, are fundamental for developing the related technology and practical application. In this work, pyrolysis behavior and kinetics in the pyrolysis process of a coal sample were investigated by the thermogravimetric analyzer at a heating rate of 10, 40, 70,100, 200, and 500 °C/min, respectively. The pyrolysis process could be divided into four stages according to the TG/DTG curves. The first stage was mainly attributed to the removal of volatiles, and the second peak was the polycondensation reaction between the volatile components. It was found that more volatiles could be released from coal during pyrolysis at higher heating rate and the higher pyrolysis temperature was necessary for a rapid pyrolysis process. Kinetic analysis revealed that both the model-free(KAS and FWO) and the Coats-Redfern methods were suitable to describing the pyrolysis process, and the variation of activation energy(E) with the two types of kinetic models was consistent during the whole pyrolysis process. Furthermore, the heating rate did not alter the reaction sequence of the whole pyrolysis process, but higher heating rate could make the E value of the initial pyrolysis stage smaller.