摘要
为了探究生物质混合热解过程中存在的协同效应,采用热重分析仪对芦苇、玉米秆、梧桐叶及其两两混合生物质的热解规律进行了研究。结果表明:生物质混合热解与生物质单独热解的失重趋势基本相同,可以分为干燥、预热、质量快速减少和碳化四个阶段;玉米秆与芦苇混合物、梧桐叶与芦苇混合物的热解起始温度低于单独热解时的平均值,失重率高于单独热解时的平均值,热解特征因素高于其单独热解的平均值,活化能小于其单独热解的平均值;采用二级化学反应动力学模型可以很好地拟合生物质热解过程。
In order to explore the synergistic effect in the mixed pyrolysis process of biomass,the pyrolysis law of reed,corn stalk,paulownia leaves and their mixed biomass was studied by thermogravimetric analyzer. The results show that the weight loss trend of biomass mixed pyrolysis and biomass alone is basically the same,which can be divided into four stages: drying,preheating,rapid reduction and carbonization. The pyrolysis initial temperature of the mixture of corn stalk and reed,Chinese para-sol leaf and reed is lower than that of the single thermal solution,and the weight loss rate is higher than that of the individual. The pyrolysis characteristic factor is higher than the average of the pyrolysis,and the activation energy is less than the average of the pyrolysis. The two stage chemical reaction kinetic model can be used to fit the biomass pyrolysis process well.
引文
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