基于程序升温实验的同组煤氧化动力学分析  

Oxidation Kinetic Analysis of the Same Group Coal Based on Programmed Temperature

作　　者：张嬿妮 陈龙 邓军 赵婧昱 王凯 宋佳佳 ZHANG Yanni;CHEN Long;DENG Jun;ZHAO Jingyu;WANG Kai;SONG Jiajia(School of Safety Science and Engineering, Xi＇ an University of Science and Technology, Xi＇ an 710054, China;Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi＇an 710054, China)

机构地区：[1]西安科技大学安全科学与工程学院,陕西西安710054 [2]陕西省煤火灾害防治重点实验室,陕西西安710054

出　　处：《煤矿安全》2018年第5期31-34,39,共5页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51674191);陕西省自然科学基金资助项目(2016JM5016);中国博士后科学基金资助项目(2016M592902XB)

摘　　要：为了研究同组煤的自燃特性,选取淮南矿区3个煤样进行程序升温实验,分析了煤样的耗氧速率和放热强度,通过积分法算出煤样的特征温度和煤氧复合反应的活化能和指前因子。结果表明:新庄孜11煤的耗氧速率和放热强度均小于张集6煤和潘一8煤;同组煤的特征温度较为接近,临界温度在70~80℃之间,干裂温度在115~125℃之间;各煤样的活化能和指前因子均随着反应的进行而增大;根据特征温度点将反应划分为3个阶段:Ⅰ阶段,新庄孜11煤的活化能和指前因子大于潘一8煤和张集6煤;Ⅱ阶段,张集6煤的活化能和指前因子均大于新庄孜11煤和潘一8煤;Ⅲ阶段,潘一8煤的活化能和指前因子大于张集6煤和新庄孜11煤。In order to study the spontaneous combustion characteristics of the same group of coal, three coal samples from Huainan Mining Area were selected for the programmed temperature experiment, the oxygen consumption rate and exothermic intensity of each coal sample were analyzed, the characteristic temperature of each coal sample and the activation energy and preexponential factors of coal-oxygen compound reaction were calculated by integral method. The results show that： the oxygen consumption rate and exothermic intensity of Xinzhuangzi 11~# coal are smaller than that of Zhangji 6~# coal and Panyi 8~# coal; the characteristic temperature of the same coal is close, and the critical temperature is between 70 ℃ and 80 ℃, drying temperature is between 115 ℃ and 125 ℃; the activation energies and pre-exponential factors of each coal sample increase with the progress of the reaction. The reaction is divided into three phases according to the characteristic temperature point： in phase Ⅰ, the activation energies and pre-exponential factors of Xinzhuangzi 11~# coal were higher than that of Panyi 8 coal and Zhangji 6~# coal; in phaseⅡ, the activation energies and pre-exponential factors of Zhangji 6~# coal are all larger than that of Xinzhuangzi 11~# coal and Panyi 8~# coal; in phase Ⅲ, the activation energies and pre-exponential factors of Panyi 8~# coal are larger than that of Zhangji 6~# coal and Xinzhuangzi 11~# coal.

关 键 词：活化能 氧化动力学 同组煤 放热强度 特征温度 耗氧速率 

分 类 号：TD752.2[矿业工程—矿井通风与安全]