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Efficiency estimation of tray columns based on flow profiles and vapor-liquid equilibrium characteristics of binary mixtures

Vishwakarma, V.; Rigos, N.; Schubert, M.; Hampel, U.

A new systematic approach for estimating the section and column efficiencies based on flow profiles and vapor−liquid equilibrium (VLE) characteristics of binary mixtures exclusively for each tray is proposed. A novel iterative technique for approximating the slope of the VLE curve and the tray efficiency is also developed. For demonstrating the predictive capabilities of the new approach, two case studies are formulated in this work - one with a theoretical column processing selected binary mixtures at total reflux, and the other involving an industrial column whose performance data are acquired from the literature. An in-depth analysis of theoretical column study reveals the superiority of the new approach over the most applied method. In the case study of industrial column, the new approach predicts the section efficiency accurately, unlike the efficiency underestimation from the most applied method. Such an approach would allow a priori calculation of the section and column efficiencies in the tray and column design phase.

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Permalink: https://www.hzdr.de/publications/Publ-29618
Publ.-Id: 29618