乙酰化木粉的热解动力学研究  

Study on pyrolysis kinetics of acetylated wood flour

作　　者：谢振华[1] 张明明[1] 金立维[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,江苏南京210042 [2]中国林业科学研究院林业新技术研究所,北京100091

出　　处：《南京林业大学学报（自然科学版）》2014年第4期131-134,共4页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家林业公益性行业科研重大专项项目(201104004)

摘　　要：利用热重分析仪在升温速率分别为5、10、15、20和25 K/min的条件下对乙酰化木粉进行热解研究,利用Horowitz-Metzger和Coats-Redlfern两种不同的动力学模型对乙酰化木粉进行热解动力学分析。结果表明:乙酰化木粉的热解过程主要分为预热解、快速热解和慢速热解3个阶段,其中快速热解阶段失重率可达70%。对实验数据进行回归拟合,结果显示快速热解过程是一级反应。由两种模型计算所得的活化能数值不同,但是总体变化趋势基本相同。与其他一些生物质材料的热解参数对比可知乙酰化木粉更难被热分解。The pyrolysis characteristics of acetylated wood flour（ AWF） were studied at different heating rates（ 5,10,15,20 and 25 K /min） by thermogravimetric analysis,and the pyrolysis kinetics was studied by Horowitz-Metzger and Coats-Redlfern. The result showed that the pyrolysis process of AWF included pre-pyrolysis,fast pyrolysis and slow pyrolysis. The percentage of loss weight of AWF at fast pyrolysis stage reached 70%. The experiment data regressed by two different models illuminated the fast pyrolysis process was a first-order reaction. Activation energy values calculated by each model were different,but the overall trend was almost the same. It was showed that AWF decomposed less than some other biomass materials by contrasting their pyrolysis parameters.

关 键 词：乙酰化木粉 热解动力学 活化能 生物质材料 

分 类 号：TQ352[化学工程]