摘要
在氮气气氛和不同的加热速率下对杉木原料进行了热重分析。由失重和失重速率曲线分析可知,生物质热解过程分为三个阶段。采用非线性最小平方算法,按三组分独立平行一级反应热解动力学模型,模拟计算的曲线与实验结果吻合较好,求解的动力学参数与文献报道值吻合较好,且随着升温速率的加快,纤维素和木质素热解的活化能有增加的趋势,而半纤维素活化能有下降的趋势。
Thermal analysis of fir wood has been carried out under various heating rates anti nitrogen atmosphere. According to the thermogravimetry （TG） and derivative thermogravimetry （DTG） curves, pyrolysis process is divided into three phases. Fitting curves are in good agreement with the experimental results, the calculated kinetic parameters are in good agreement with those reported in term of modeling of the pyrolysis of the three components assuming hemicellulose, cellulose and lignin pyrolyzing independently and parallelly obeying first order reaction mechanism by nonlinear least-squares algorithm. In addition, activation energy values of cellulose and lignin tend to rise,whereas that of hemicellulose tends to fall with the heating rate increasing.
出处
《化学与生物工程》
CAS
2009年第7期61-63,74,共4页
Chemistry & Bioengineering
基金
国家自然科学基金资助项目(20676002)
巢湖学院科研启动基金资助项目
关键词
生物质
热解
动力学
biomass
pyrolysis
kinetics
