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以地沟油生物柴油为对象,利用热分析仪与傅里叶红外分析仪联用对地沟油生物柴油热裂解行为进行实验研究。实验结果表明:地沟油生物柴油的热裂解分为3个阶段,即:小分子低沸点组分挥发阶段、脂肪酸甲酯挥发和热裂解阶段、地沟油生物柴油的碳化阶段。随着升温速率的增大,地沟油生物柴油的热裂解反应向高温区移动,最大失重速率由7.1%/min增至47.1%/min。地沟油生物柴油的热裂解动力学分析具有分段特征,在不同反应阶段动力学参数差别较大,初始阶段活化能为103.76~193.89 k J/mol,中间阶段活化能为81.30~210.74 k J/mol。
Taking waste oil biodiesel as the object, the pyrolysis behavior of waste oil biodiesel was studied by using thermal analyzer and Fourier transform infrared analyzer. The experimental results show that the pyrolysis of waste oil biodiesel is divided into three stages, namely the evaporation stage of small molecular weight low boiling point components, the stage of fatty acid methyl ester volatilization and pyrolysis, and the stage of carbonization of waste oil biodiesel. With the increase of heating rate, the pyrolysis reaction of waste oil biodiesel moves to high temperature, and the maximum weight loss rate increases from 7.1% to 47.1% / min. The kinetic analysis of pyrolysis oil in biodiesel oil has the characteristic of subdivision. The kinetic parameters vary greatly in different reaction stages. The activation energy is 103.76-193.89 kJ / mol in the initial stage and 81.30-210.74 kJ / mol in the middle stage. mol.