摘要
为高效利用大豆秆,有效控制热解产物,采用FTIR分析了大豆秆的组分,利用热重法在4个不同升温速率下对大豆秆的热解行为进行了研究。结果表明,大豆秆主要组分为纤维素、半纤维素、木质素和木聚糖等。大豆秆热解可分为4个阶段,随着升温速率的提高,主反应区热重曲线和微分热重曲线都向高温方向移动,热解最大速率以及相对应的温度随之提高;Ozawa法计算大豆秆主热解区间的活化能值集中在98.78～191.75kJ/mol;譒atava机理函数推断法得出大豆秆热解的最可能机理属于19号机理函数Avrami-Erofeev方程,随机成核和随后生长,反应级数n=3。
In order to use the soybean stalk and control the pyrolysis products effectively, compo-nent analysis was carried out by FTIR, and the pyrolysis characteristics of soybean stalk were per- formed by thermogravimetric analysis （TGA） at four different heating rates. The results show the cellulose, hemicellulose, lignin and xylan are the main components of soybean stalk, and the pyrol- ysis process of soybean stalk can be separated into four stages. With the heating rate increasing, the TG and DTG curves of the main pyrolysis area shift to the high temperature scale, the maxi- mum pyrolysis rate and its corresponding temperature increase too. The activation energy of （he main pyrolysis area is concentrate in 98.78-191.75 kJ/mol calculated by the method of Ozawa. The most possible mechanism function of soybean stalk is Avrami-Erofeev equation, which is a random nucleation and later growth, and reaction order is 3.
出处
《可再生能源》
CAS
北大核心
2012年第12期40-44,共5页
Renewable Energy Resources
基金
辽宁省博士启动基金项目(20091072)
关键词
大豆秆
生物质
热解
动力学
soybean stalk
biomass
pyrolysis
dynamics
