载体活性炭的热分析动力学研究  

Study on thermal analysis kinetics of carbon support

作　　者：宋军[1] 王鉴[1] 邴国强[1] 汪丽 李伟[2] 

机构地区：[1]东北石油大学化学化工学院,黑龙江大庆163318 [2]中国石油大庆炼化公司,黑龙江大庆163411

出　　处：《应用化工》2012年第2期304-306,共3页Applied Chemical Industry

摘　　要：以热重分析为手段,考察了活性炭的热分解性能。采用多个升温速率法,获得热重(TG)和微分热重(DTG)曲线。采用等转化率法对实验数据进行了处理,求出其动力学参数。结果表明,随着升温速率的增大,TG曲线的失重反应起始温度及DTG曲线的峰温向高温方向漂移,出现温度滞后现象。根据采集的实验数据,将ln(βddαT)对Tl作图所拟合的直线的线性关系良好,根据直线斜率值求得的活化能E=96.59 kJ/mol。以ln[A.(1-α)n]对ln(1-α)作图得到一条直线,根据直线的斜率和截距可分别求得该反应在设定f(α)=(1-α)n形式下的n=3.585,A=40 189.859 84。By thermal analysis,thermal decomposition characteristics of actived carbon was studied.The TG and DTG curves of actived carbon were obtained using multiple heating rate method.The test data were processed by iso-conversional method to obtain the kinetic parameters.The results showed that,with improving heating rate,the starting reaction temperature of TG and the peak temperature of DTG shifted to the high temperature zone,postponement phenomena occurred.Based on the collected experimental data,it proved that ln（βdαdT） had better linear relations with lT.The activation energy E of decomposition reaction of actived carbon,which was determined by measurements of slope,was 96.59 kJ/mol.The plot of ln[A·（1-α）n]vs ln（1-α） was drew and a straight line was obtained.The mechanism function was defined as f（α）=（1-α）n,so according to the slope and intercept of the line,it can be obtained that n=3.585,A=40 189.859 84.

关 键 词：活性炭 热分析 动力学 

分 类 号：TQ426.65[化学工程]