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采用热重分析法(TGA)对几种纤维素类生物质(稻壳、豆杆、豆壳、稻杆)的热解过程及其动力学进行了研究。实验是在氮气气氛下,分别以10,20,30,40,50℃/min等加热速率和40～60,60～80,80～100,100目等粒径进行的。实验结果表明:几种纤维素类生物质的非等温热解只有1个剧烈失重阶段。随升温速率的提高,粒径的增大,生物质的最大热解速度提高,对应的峰值温度升高。纤维素类生物质的热解机理满足一级反应动力学方程,随着升温速率的提高,粒径的增大,其活化能(E)和指前因子(A)增大l,nA与E之间存在近似的线性关系。
The thermogravimetric analysis (TGA) was used to study the pyrolysis process and kinetics of several cellulosic biomass (rice husk, beanstalk, bean hulls and rice straw). The experiments were carried out under a nitrogen atmosphere at a heating rate of 10, 20, 30, 40, 50 ° C / min and the like with particle sizes of 40-60, 60-80, 80-100 and 100 meshes. The experimental results show that there are only one stage of severe weightlessness in non-isothermal pyrolysis of several cellulosic biomass. With the increase of heating rate, the particle size increases, the maximum pyrolysis rate of biomass increases and the corresponding peak temperature increases. The pyrolysis mechanism of cellulosic biomass satisfies the first-order reaction kinetics equation. With the increase of heating rate and particle size, the activation energy (E) and pre-exponential factor (A) increase, nA and E There is an approximate linear relationship between.