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Prediction of Distillation Column Performance by Computational mass transfer Method

Chinese Journal of Chemical Engineering 2011年第5期19卷 833-844页

作者：孙志民刘春江余国琮袁希钢 State Key Laboratory for Chemical Engineering (Tianjin University) and School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

A computational mass transfer model is proposed for predicting the concentration profile and Murphree efficiency of sieve tray distillation column. The proposed model is based on using modified c＇2 -εc＇ two equations formulation for closing the differential turbulent mass transfer equation with improvement by considering the vapor injected from the sieve hole to be three dimensional. The predicted concentration distributions by using proposed model were checked by experimental work conducted on a sieve tray simulator of 1.2 meters in diameter for desorbing the dissolved oxygen in the feed water by blowing air. The model predictions were confirmed by the experimental measurement. The validation of the proposed model was further tested by comparing the simulated result with the performance of an industrial scale sieve tray distillation column reported by Kunesh et al. for the stripping of toluene from its water solution. The predicted outlet concentration of each tray and the Murphree tray efficiencies under different operating conditions were in agreement with the published data. The simulated turbulent mass transfer diffusivity on each tray was within the range of the experimental result in the same sieve column reported by Cai et al. In addition, the prediction of the influence of sieve tray structure on the tray efficiency by using the proposed model was demonstrated.

关键词： simulation concentration field computational mass transfer computational fluid-dynamics tray efficiency sieve tray turbulent mass transfer diffusivity

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Computational mass transfer Method for Chemical Process Simulation

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Chinese Journal of Chemical Engineering 2008年第4期16卷 497-502页

作者：袁希钢余国琮 State Key Laboratory of Chemical Engineering Tianjin University Tianjin 300072 China

The recent works on the development of computational mass transfer （CMT） method and its applications in chemical process simulation are reviewed. Some development strategies and challenges in future research are als... 详细信息

关键词： computational mass transfer turbulent mass transfer diffusivity chemical process simulation

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