典型废旧家电印刷线路板热失重特性和热解动力学模型  

Thermogravimetric Characteristics and Kinetic Modes of Printed Circuit Boards from Typical Waste Life Electro-Equipments

作　　者：马洪亭[1] 王明辉[1] 王芳超[1] 郝夙枫[1] 杨国利[1] 张于峰[1] 邓娜[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300072

出　　处：《天津大学学报》2011年第7期602-606,共5页Journal of Tianjin University(Science and Technology)

基　　金：天津市自然科学基金资助项目(09JCYBJC08100);天津市滨海新区"十大战役"重大科技支撑项目(2010-Bk140002);天津市科技创新专项资金资助项目(07FDIDH0400)

摘　　要：用热重法研究了废旧电视机、电脑、手机和洗衣机4种典型家电印刷线路板的热解特性,发现在相同条件下不同印刷线路板的热解起始温度、终止温度、最大失重速率、峰温和反应时间随升温速率的变化规律一致,但总失重率存在着较大差异.建立了不定温条件下非均相反应的热解动力学模型,用Kissinger法和形状因子法求解了4种典型家用电器印刷线路板的表观动力学参数E、A和n.彩电:E=103.09,kJ/mol,A=8.17×108,/min,n=1.73;洗衣机:E=98.15,kJ/mol,A=1.50×108,/min,n=2.73;手机:E=78.79,kJ/mol,A=2.48×106/min,n=3.56;电脑:E=101.31,kJ/mol,A=2.96×108,/min,n=1.77.由动力学模型计算出的转化率与实验值之间能够较好地吻合.The thermogravimetric characteristics of printed circuit boards（PCBs）from waste color televisions,computers,mobile phones,and washing machines were studied using thermogravimetry in strict pyrolyisis condi-tions.The results indicated that the variations of initial temperature,finial temperature,maximum weight loss ratios,peak temperature,and reaction time with heating rate are similar for different printed circuit boards.However,the total weight loss ratios have an obvious difference for different printed circuit boards in the same condi-tions.Based on the assumptions of non-isothermal and heterogeneous reactions,a kinetic mode was established,and the apparent kinetic parameters for different printed circuit boards were obtained with Kissinger method and shape index method.The activation energy E,the pre-exponential factor A,and the reaction order n were ： 103.09,kJ/mol,8.17×108 /min,and 1.73 for color television PCB,98.15,kJ/mol,1.50×108,/min,and 2.73 for washing machine PCB,78.79,kJ/mol,2.48×106,/min,and 3.56 for mobile phone PCB,101.31,k/mol,2.96×108,/min,and 1.77 for computer PCB,respectively.The conversion calculated agreed quite well with the ex-perimental data.

关 键 词：典型废旧家电 热失重特性 印刷线路板 动力学模型 

分 类 号：O621.259[理学—有机化学]