稻壳与褐煤共热解动力学研究  

KINETIC ANALYSIS OF RICE HUSK AND LIGNITE DURING CO-PYROLYSIS

作　　者：孙云娟[1,2] 蒋剑春[1] 赵淑蘅[1] 戴伟娣[1,2] 许玉[1,2] 应浩[1,2] 

机构地区：[1]中国林业科学研究院林产化学工业研究所,生物质化学利用国家工程实验室,国家林业局,林产化学工程重点开放性实验室,江苏省生物质能源与材料重点实验室,南京210042 [2]中国林业科学研究院林业新技术研究所,北京100091

出　　处：《太阳能学报》2016年第11期2747-2753,共7页Acta Energiae Solaris Sinica

基　　金：中央级公益性科研院所基本科研业务费专项(CAFINT2014K04);国家科技支撑计划(2015BAD21B05);引进国际先进林业科学技术项目(2014-4-32)

摘　　要：利用热重分析仪对稻壳与褐煤单独及共热解过程进行研究。动力学分析选用Coats—Redfern模型和分布活化能模型（DAEM），发现Coats—Redfern模型无法在整个温度区间内对生物质的热解进行预测，只能将热解过程分为多段的单一反应；DAEM法计算得到的热解活化能随原料转化率的增大，大体呈现升高-平稳-升高的趋势；稻壳热解平均活化能约为182kJ／mol，褐煤为288kJ／mol，共热解因混合比例的不同而有所差异，为180．190kJ／mol，远小于褐煤，推测生物质的存在对煤炭热解具有一定的促进作用；对比Coats-Redfern模型和DAEM模型对于共热解过程动力学分析，发现DAEM模型更适于模拟稻壳与褐煤共热解过程中的活化能变化情况。The pyrolysis and co-pyrolysis characteristic of rice husk and lignite were investigated by TG. The traditional model （Coats-Redfern method）and distributed activation energy model （DAEM） were used to analysis the pyrolysis kinetic. The Coats-Redfern method merely explained the pyrolysis kinetic partially, however, the DAEM could describe the entire process kinetic. In DAEM method, the active energy showed a rise-steady-rise tendency as the pyrolysis reaction conversion increased; The average activation energy of pyrolysis of rice husk was about 182 kJ/mol, and lignite was 288 kJ/mol; While the process of co-pyrolysis with different ratio of rice husk were about 180-190 kJ/mol, far less than lignite, therefore there might be synergy effect during co-pyrolysis. And DAEM is better kinetic analysis method for co-pyrolysis of rice husk and lignite.

关 键 词：稻壳 褐煤 共热解 Coats-Redfern模型 DAEM 

分 类 号：TK6[动力工程及工程热物理—生物能]