Reactions related with hydroxyl, carboxyl and alkyl side chain at different temperature stages and the effects on low-rank coal ignitionShengyue Ma, Jie Xiong, Jing Xiao, Yueling Zhang, Ruihong Zhang, Yajun Tian and Kechang XieE3S Web Conf., 213 (2020) 01013DOI: https://doi.org/10.1051/e3sconf/202021301013