神府粉煤热解动力学及产物半焦研究  

Study on pyrolysis kinetic and product semi-coke of Shenfu pulverized coal

作　　者：王苗[1] 权洋洋 王毅[1] WANG Miao;QUAN Yang-yang;WANG Yi(Department of Mechanical Engineering,Xi’an Jiaotong University City College,Xi’an 710018,China;Xi’an North Qinchuan Group Co.,Ltd.,Xi’an 710043,China)

机构地区：[1]西安交通大学城市学院机械工程系,陕西西安710018 [2]西安北方秦川集团有限公司,陕西西安710043

出　　处：《应用化工》2019年第7期1584-1586,1591,共4页Applied Chemical Industry

基　　金：陕西省教育厅专项科研计划项目(18JK1030);西安交通大学城市学院2017年度校级科研项目(2017KZ04)

摘　　要：通过TG/DTG热分析仪,对不同升温速率下神府粉煤热解特性进行实验研究,利用扫描电镜(SEM)对不同升温速率下的产物半焦进行外貌表征,将粉煤热解过程分为三段,分别建立一级动力学模型。结果表明,随着升温速率的增加,粉煤热解失重率降低,当升温速率由10℃/min升高到30℃/min时,热解失重率由37.0%降低到23.02%;产物半焦具有丰富的孔隙结构,升温速率越大,热解产物半焦的孔径越大,且排列趋于规则化;由一级动力学模型结果可得,活化能和频率因子之间存在补偿效应。The pyrolysis characteristics of pulverized coal at different heating rates were studied by TG/DTG thermogravimetric analysis.The products were characterized by scanning electron microscopy (SEM).The pyrolysis process of the pulverized coal was divided into three sections,and the first-order kinetic models were established respectively.The results showed that the pyrolysis weightlessness rate of pulverized coal decreased with the increase of heating rate,and when the heating rate increased from 10 ℃/min to 30 ℃/min,the pyrolysis weightlessness rate decreased from 37.0% to 23.02%;the product semi-coke has a rich pore structure,the pore size of the pyrolysis product became larger with larger heating rate,and the arrangement of pore structure tended to be regular;The results from first-order kinetic models,showed that there exist compensation effect between activation energy and frequency factor.

关 键 词：粉煤 热解 半焦 扫描电镜 动力学模型 

分 类 号：TQ530.2[化学工程—煤化学工程]