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Mathematical modeling and experimental esterification at supercritical conditions for biodiesel production in a tubular reactor

机译:在管式反应器中生产生物柴油的超临界条件下的数学建模和实验酯化

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The non-catalytic esterification of oleic acid with supercritical ethanol was carried out in a tubular reactor at different temperatures (150-300 degrees C), molar ratios (1:1-6:1) and volumetric flow rates (0.001-0.005 dm(3)/min). The highest free fatty acid conversion was obtained at 300 degrees C, ethanol to oleic acid molar ratio of 6:1 and fixed pressure of 150 bar. A phenomenological axial dispersion model was developed to evaluate the intrinsic effects of the operating variables on the conversion of oleic acid to ethyl oleate. The density of the reaction mixture was estimated using the Peng-Robinson equation of state. Distinct experimental data set were used for parameter estimation and validation of the model. The results demonstrated that the correction of the flow velocity is necessary, and that the axial dispersion effect cannot be neglected.
机译:油酸与超临界乙醇的非催化酯化反应在管式反应器中于不同温度(150-300摄氏度),摩尔比(1:1-6:1)和体积流量(0.001-0.005 dm( 3)/ min)。在300摄氏度,乙醇与油酸的摩尔比为6:1和固定压力为150巴的情况下,获得了最高的游离脂肪酸转化率。建立了一个现象学的轴向弥散模型,以评估操作变量对油酸向油酸乙酯转化的内在影响。使用Peng-Robinson状态方程估算反应混合物的密度。不同的实验数据集用于参数估计和模型验证。结果表明,必须对流速进行校正,并且不能忽略轴向分散效应。

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