生物质N_2/CO_2气氛下热解及动力学特性研究  

STUDY ON PYROLYSIS AND KINETICS CHARACTERISTICS OF BIOMASS IN N_2/CO_2 ATMOSPHERE

作　　者：蒲舸[1] 郝功涛[1] 

机构地区：[1]低品位能源利用技术及系统教育部重点实验室,重庆大学,重庆博士副教授400030

出　　处：《煤炭转化》2011年第4期83-86,92,共5页Coal Conversion

基　　金：中央高校基本科研业务费项目(CDJZR10140001)

摘　　要：针对林业加工剩余物中常见的松木和慈竹两种生物质,采用非等温热重分析法研究了其热解及动力学特性,考察了不同CO2浓度和升温速率下的热解特性,采用不同反应模型进行动力学特性分析.结果表明,随着CO2浓度增大,低温热解区失重率变化较小,而高温热解区失重率和最大失重速率显著增大;随升温速率的升高,高温热解区存在热解滞后现象;N级反应模型和体积收缩反应模型分别适用于低温和高温热解区动力学参数的求解.The pyrolysis and kinetic characteristics of two kinds of biomass left during forestry processing（pine,sinocalamus affinis mcclure） were studied with non-isothermal thermogravimetric analysis method.Effects of CO2 concentration and heating rate on pyrolysis characteristics were investigated.Kinetic parameters were analyzed with two different reaction models.The results indicate that with the increase of CO2 concentration,the changes of weight loss ratio were small in the low temperature zone,but the weight loss ratio and maximum weight loss rate increased in the high temperature zone.An increase of the heating rate also tended to slightly delay pyrolysis processes towards higher temperatures.It was found that nth order reaction model was better to solve the kinetic parameters in the low temperature zone.However,contracting volume reaction model was better in the high temperature zone.

关 键 词：生物质 热解特性 非等温热重分析法 N级反应模型 体积收缩反应模型 

分 类 号：TK62[动力工程及工程热物理—生物能]