多孔玉米淀粉热分解反应动力学  

Kinetics of Thermal Degradation of Porous Corn Starch

作　　者：金顶峰[1,2] 杨潇[2] 吴盼盼[2] 张明[3] 葛洪良[2] 王正宝[1] 楼辉[4] 

机构地区：[1]浙江大学化学工程与生物工程学院,浙江杭州310027 [2]中国计量学院材料科学与工程学院,浙江杭州310018 [3]中国计量学院环境工程系,浙江杭州310018 [4]浙江大学化学系,浙江杭州310028

出　　处：《高校化学工程学报》2015年第6期1371-1376,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(21103154;21001098;51172220;51172219);浙江省钱江人才计划项目(2012R10065);中国博士后科学基金(2013M531449)

摘　　要：采用热重分析法研究了多孔玉米淀粉热分解过程。在氮气气氛下以5、10、20和30 K×min^(-1)的升温速率对其进行了热重分析,并采用OZAWA法、FRIEDMAN法和同步热分析法计算了多孔玉米淀粉热解反应的活化能分别为165.63、174.89和187.80 k J×mol^(-1)。经同步热分析法推导出反应级数为0.5~1;用Coats-Redfern法得到多孔玉米淀粉热解反应机理函数为[-ln(1-α)]1/2。The thermal degradation of porous corn starch was investigated by thermogravimetric analysis. This measurement was processed in nitrogen atmosphere under different heating rates of 5, 10, 20 and 30 K×min^-1. The experimental data were processed by OZAWA, FRIEDMAN and simultaneous thermal analysis methods and the activation energies calculated were 165.63, 174.89 and 187.80 k J×mol^-1, respectively. The reaction order was 0.5-1 calculated by the simultaneous thermal analysis method and reaction mechanism function was [-ln（1-α）]^1/2 obtained from the Coats-Redfern method.

关 键 词：多孔玉米淀粉 热重分析 反应动力学 活化能 

分 类 号：O063[理学]