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《中国化学工程学报(英文版)》 2008-02
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Mathematical Modeling of the Oxidation of Polyunsaturated Fatty Acids in Emulsions with Stirring and Limited Oxygen Compensation

LüBing 1,2,,CHEN Jie1 and XIA Wenshui 1,2 1State Key Laboratory of Food Science and Technology,Jiangnan University,Wuxi 214122,China 2School of Food Science and Technology,Jiangnan University,Wuxi 214122,China  
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.
【Fund】: Supported by the National Natural Science Foundation of China(20401007)
【CateGory Index】: O621.25
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