棉短绒制浆黑液固形物热解动力学分析  

Analysis on pyrolysis kinetics for black liquor from cotton pulp

作　　者：裴丽华[1] 杨桂花[1] 张中山[1] 刘小宁[1] 陈嘉川[1] 

机构地区：[1]齐鲁工业大学制浆造纸科学与技术教育部重点实验室,济南250353

出　　处：《中华纸业》2015年第24期12-16,共5页China Pulp & Paper Industry

基　　金：国家自然科学基金(31270626;31270627;31370580;31470602);山东省重大科技专项(2014ZZCX09101;2015ZDZX09002);泰山学者工程专项经费

摘　　要：采用热重技术对棉短绒浆黑液中的固形有机物进行了热解动力学分析。黑液固形有机物的热解主要分为两个阶段,即200~350℃阶段,350~550℃阶段。首先利用Kissi nger方法和FWO(Flynn-Wall-Ozawa)方法计算出了黑液固形物热解过程中的表观活化能,在此基础上,再采用?atava-?esták方法探讨不同机理模型,确定了黑液固形物热解机理方程,第一段热解机理方程为G(α)=α~2;第二段热解机理方程为G(α)={[1/(1+α)]^(1/3)-1}~2。热解动力学参数表明低升温速率有助于热解反应的发生。The pyrolysis kinetics of organic components of black liquor solid（BLS） of cotton pulp via thermogravimetric analysis. There are two stages in pyrolysis process of BLS, the fi rst stage 200^350℃ and second stage 350^400℃. Firstly, the activation energies of BLS in the thermal decomposition process were determined by using the Kissinger method and Flynn-Wall-Ozawa（FWO） method, based on which the decomposition mechanism model of BLS was obtained by using the ？atava-？esták method in different mechanism models. The result showed that the mechanism equations of the f irst and second stages pyrolysis process are G（α）=α^2 and G（α） ={[1？（1＋α）]^（1？3）-1}^2 respectively. Pyrolysis kinetics parameters demonstrated that the low heating rate is helpful to the occurrence of pyrolysis.

关 键 词：棉短绒 黑液固形物 热解 动力学 

分 类 号：X793[环境科学与工程—环境工程] O643.1[理学—物理化学]