重庆大学学报2017，Vol.40Issue(11)：20-27,8.DOI:10.11835/j.issn.1000-582X.2017.11.003
基于活化能计算的煤低温氧化特征与临界点预测
Characteristics of low temperature coal oxidation and prediction model of critical point based on activation energy calculation
摘要
Abstract
To investigate the characteristics of adiabatic oxidation reaction and predict critical temperature of coal spontaneous combustion,we carry out the adiabatic oxidation experiments of five coal samples and use the index of activation energy to reflect the characteristics of microcosmic reaction of spontaneous combustion in different stages.In addition,the critical point (Tc) is determined by using the F test of linear regression analysis.The results show that in the early stage of low temperature oxidation of coal,the values of activation energy range greatly,which indicates that reactions of the functional groups is very unstable at this time;as the temperature increases,the values of all samples are in a range of 55 to 70 kJ/mol in late period of the experiment,which indicates that the reaction has become relatively stable;Tc has good correlation with macro-heating rate,which indicates the model is scientific.In addition,Tc has linear relationship with t0 (the time needed for spontaneous combustion temperature increasing to 160 ℃ in the experiment).Thus Tc could be predicted by t0.This research could provide reference for the prevention fire and coal storage in mine.关键词
绝热反应/煤自燃/临界点/活化能/官能团Key words
adiabatic reaction/coal spontaneous combustion/critical point/activation energy/functional group分类
矿业与冶金引用本文复制引用
高玉龙,李林,陈军朝,姜德义,陈结,张立..基于活化能计算的煤低温氧化特征与临界点预测[J].重庆大学学报,2017,40(11):20-27,8.基金项目
国家自然科学基金资助项目(51574048,51304256) （51574048,51304256）
重庆市研究生科研创新项目(CYB14103).Supported by National Natural Science Foundation of China (51574048,51304256) and Research and Innovation Project of Graduate Students in Chongqing(CYB14103). （CYB14103）
