论文部分内容阅读
对稻壳、稻秆、芒属和芦苇的热解过程进行热重分析(TG)。基于生物质热解三组分模型理论,运用高斯多峰拟合法对上述4种生物质的失重速率曲线进行解析。结果表明:4种生物质的热解失重速率曲线均可以分解成4个相互叠加的拟合峰,分别对应水分析出、半纤维素分解、纤维素分解和木质素分解。利用Coats-Redfern法计算了三组分的动力学参数。计算结果表明:半纤维素、纤维素和木质素热解的反应级数分别为2、1和2,活化能分别为152～180kJ/mol、206～248kJ/mol和32～42kJ/mol。最后采用重量加权平均法得到了4种生物质热解主要阶段的活化能。
Thermogravimetric analysis (TG) was performed on the pyrolysis of rice hulls, rice straw, mandela and reed. Based on the three-component model theory of biomass pyrolysis, the weight loss rate curves of the four kinds of biomass were analyzed by Gaussian multi-peak fitting method. The results showed that all of the four biomass pyrolysis weight loss rates could be decomposed into four superimposed fitting peaks corresponding to water analysis, hemicellulose decomposition, cellulose decomposition and lignin decomposition, respectively. The kinetic parameters of three components were calculated by Coats-Redfern method. The calculated results show that the reaction orders of hemicellulose, cellulose and lignin are 2, 1 and 2 respectively, and the activation energies are 152 ~ 180kJ / mol, 206 ~ 248kJ / mol and 32 ~ 42kJ / mol, respectively. Finally, the activation energies of the four main stages of biomass pyrolysis were obtained by weight weighted average method.