大豆皂脚热解反应动力学研究  

Pyrolysis kinetics of soybean soapstock

作　　者：李雪光[1] 刘洋[1] 代建军[1] 刘广青[1] 张瑞红[1] LI XueGuang;LIU Yang;DAI JianJun;LIU GuangQing;ZHANG RuiHong(State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学有机无机复合材料国家重点实验室,北京100029

出　　处：《北京化工大学学报（自然科学版）》2023年第2期1-7,共7页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家重点研发计划(2017YFE0124800)。

摘　　要：大豆皂脚是大豆油精炼过程中的副产物,在我国产量非常可观,但针对大豆皂脚的有效处理目前尚未引起广泛关注。采用热重分析法对不同升温速率下大豆皂脚的反应动力学进行研究,结果表明:大豆皂脚热解过程可分为4个阶段,在380~565℃范围内失重率最大;采用Flynn-Wall-Ozawa法和Kissinger-Akahira-Sunose法计算的表观活化能相近,数值在55~227 kJ/mol之间,转化率为0.5时的活化能最大。通过Malek法确定大豆皂脚的热解反应机理为三维扩散Jander 3D(n=1/2)反应。Soybean soapstock is a by-product of soybean oil refining.The output of soybean soapstock is considerable in China.However,the effective treatment of soybean soapstock has yet to attract widespread attention.The reaction kinetics of soybean soapstock at different heating rates has been studied by thermogravimetric analysis.The results showed that the pyrolysis process of soybean soapstock is divided into four stages,and the weight loss rate reached a maximum in the range 380-565℃.The apparent activation energies calculated by the Flynn-Wall-Ozawa method and the Kissinger-Akahira-Sunose method were similar,ranging from 55 kJ/mol to 227 kJ/mol,with the maximum activation energies observed at a conversion rate of 0.5.Based on the Malek method,the three-dimensional Jander 3D(n=1/2)reaction was used to determine the reaction pyrolysis mechanism for the soybean soapstock.

关 键 词：大豆皂脚 热解 反应动力学 表观活化能 

分 类 号：X712[环境科学与工程—环境工程]