Mathematical Modeling of the Oxidation of Polyunsaturated Fatty Acids in Emulsions with Stirring and Limited Oxygen Compensation

The oxidation of polyunsaturated fatty acids （PUFA） in emulsion with stirring and limited oxygen compensation was studied. A mathematical model of diffusion-oxidation was developed considering the mass transfer resistance of a gas-liquid boundary, the resistance of the boundary layer from the emulsifier membrane, and the autocatalytic-type autoxidation reaction of PUFA. The dynamic mass transfer coefficient of the emulsifier membrane, k0, was introduced. The model was verified by comparing the predictions of the model with the experi- mental data. The results indicated that the model was in good agreement with the oxygen diffusion and linoleic acid oxidation in the emulsion, and showed good applicability in the prediction of the effect of the emulsifier type on the oxidation of PUFA in the emulsion. It indicated that the oxidation of PUFA in emulsions, with stirring and limited oxygen compensation from the atmosphere, was controlled mostly by mass transfer resistance from the emulsifier membrane.

在有激动人心、有限的氧赔偿的乳剂的多元不堡和脂肪酸(PUFA ) 的氧化被学习。散开氧化的一个数学模型就一条煤气液体的边界，从 emulsifier 膜的边界层的抵抗，和 PUFA 的自动催化类型的自然氧化反应的传质阻力而言被开发。emulsifier 膜的动态传质系数， k0，被介绍。模型被把模型的预言与试验数据作比较验证。结果显示模型在乳剂在对氧散开和八碳二烯酸氧化的好同意，并且在乳剂在 PUFA 的氧化上在 emulsifier 类型的效果的预言显示出好适用性。它显示与从空气的激动人心、有限的氧赔偿，在乳剂的 PUFA 的氧化主要被传质阻力从 emulsifier 膜控制。