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The goal of the present project is to develop new volumetric mass transfer coefficient correlations for structured packing distillation columns Final developed models will be more fundamental and perform a better job in rate based modeling All the current mass transfer coefficient models are based on either the absorption system data or HETP data which are not a good representation for distillation systems But currently researchers are relying on absorption data because of lack of experimental procedure to estimate the volumetric mass transfer coefficients in distillation system When the models developed using absorption system are applied in distillation system these models are under predicting the vapor phase resistance and over predicting the liquid phase resistance 3 The reason for this difference is absorption experiments are performed at atmospheric conditions and the properties of these systems are far from distillation conditions which are often high pressure and temperature conditions Present literature models are lacking fundamental understanding of distillation system and when the same models are applied in rate based modeling performances of these models are not good 3 So there is clearly a need for the development of fundamental mass transfer models developed using the mass transfer coefficient data of distillation system The theoretical framework of two resistance theory will be utilized to develop volumetric mass transfer coefficient models The hypothesis of the present work is that the key dimensionless terms for volumetric mass transfer coefficient in absorption system and distillation system are the same Its only the exponents of these dimensionless terms that are different in distillation system compared to absorption system Therefore exponents of these dimensionless terms will be obtained by regressing the volumetric mass transfer coefficient data generated by applying Profile method 5 to distillation concentration data Profile method is the only method available to estimate the volumetric mass transfer coefficients of distillation system Databases of volumetric mass transfer coefficient data and effective interfacial data of absorption systems were assembled
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