手机SIM卡TG-FTIR热解实验研究  

Experimental research on pyrolysis of inside SIM from mobile phone using TG-FTIR analyzer

作　　者：郭晓娟[1] 张刚[1] 

机构地区：[1]东莞理工学院能源与化工系,广东东莞523808

出　　处：《化工进展》2014年第4期1030-1034,共5页Chemical Industry and Engineering Progress

基　　金：广东省自然科学基金(S2013010011909);国家自然科学基金(51176036)项目

摘　　要：利用热重．红外分析仪（TG—FTIR）研究了手机SIM卡在不同升温速率下的热解行为，探讨了升温速率对热解参数及热解产物的影响。采用分布式活化能模型求解了热解活化能，探讨了活化能随转化率的变化规律。研究结果表明：手机SIM卡呈现一段热解，主要热解温区在350－500℃，最大失重速率为－62．57％／min，总失重率高达90％。随着升温速率的提高，热解初始温度和热解结束温度均增大，最大热解速率和对应的温度也都增大；热解活化能在170－204kJ／mol变化，随转化率变化规律呈现先增大后减小再增大后逐渐减小的规律，在转化率0．2时达到最大值；主要热解产物为苯、烷烯烃等可燃成分，而且含有氯、氮等元素；升温速率对热解组分没有影响。Pyrolysis characteristics of inside SIM from mobile phone with different heating rates were investigated using a thermogravimetric analyzer （TG） coupled with a Fourier transform infrared （FTIR） spectrometer in N2 atmosphere. The effect of heating rate on pyrolysis characteristics, products composition was discussed. The distributed activation energy model （DAEM） was used to study pyrolysis kinetics of inside SIM. The influence of heating rate on activation energy was analyzed. The results showed that： the pyrolysis of inside SIM exhibited one-stage pyrolysis in a temperature range from 350 ℃ to 500 ℃; the maximum pyrolysis rate was up to -62.57%/min; the total thermogravimetric loss was more than 90%. With heating rate rising, pyrolysis initial and final temperatures, the temperature at the maximum pyrolysis rate increased. As a function of conversion rate, the pyrolysis activation energies were between 170--204 kJ/mol. At the 0.2 of conversion rate, the activation energy was up to the maximum and decreased gradully with the reaction process. The main pyrolysis products were benzene and alka（e）ne. But a little nitrogen and chloride was found. Also, there was no significant effect of heating rate on products distribution.

关 键 词：热解 活化能 热重-红外分析仪 

分 类 号：O621.259[理学—有机化学]