废弃物干酒糟生物质热解特性及动力学研究

STUDY ON BIOMASS PYROLYSIS CHARACTERIZATION AND KINETICS OF WASTE DRIED DISTILLER'S GRAINS

摘要: 酒糟（DG）的组成成分以及在50～900℃范围内的热解进行研究。TG/DTG实验结果表明，DG的开始热解温度为137℃，热解温度在305℃时热解速率最快，为6%/min。傅里叶变换红外光谱（FTIR）数据表明，DG的主要气态产物为CO₂、CH₄、酮、醛、酸和胺。通过分布式活化能模型（DAEM）与无模型积分（Flynn-Wall-Ozawa,FWO）方法对DG的动力学行为分析发现，DG在热解初始阶段活化能为76.49 kJ/mol，平稳阶段活化能为160 kJ/mol。随着热解反应的进行，DG的热解活化能逐渐升高。

Abstract: By studying the composition of Distiller’s grains and its pyrolysis in the temperature range of 50-900 °C,the TG/DTG results show that the initial pyrolysis temperature of DG is 137 ℃ and the fastest pyrolysis rate of 6% · min^-1 is obtained at a pyrolysis temperature of 305 ℃. 3D-FTIR data shows that the main gaseous products of DG are CO₂,CH₄,ketones,aldehydes,acids and amines.The kinetic behavior of DG was analyzed by the Distributed Activation Energy Model（DAEM）and Flynn-Wall-Ozawa（FWO）method,which showed that the activation energy of DG was 76.49 kJ/mol at the initial stage of pyrolysis and 160 kJ/mol at the steady stage.