Experimental validation of a flexible modeling approach for distillation columns with packings

Christoph Ehlers; Georg Fieg

doi:10.1002/aic.14560

journal article Jul 24, 2014

Experimental validation of a flexible modeling approach for distillation columns with packings

Christoph Ehlers Georg Fieg

AIChE Journal Vol. 60 No. 11 pp. 3833-3847 · Wiley

View at Publisher Save 10.1002/aic.14560

Abstract

The two main concepts for the modeling of distillation columns are the equilibrium‐stage (EQ) and the nonequilibrium‐stage (NEQ). A model is presented which combines decisive features of both conventional concepts. Based on the idea of a reduced nonequilibrium‐stage (RNEQ), this model can be used for the simulation of distillation columns with packings. In contrast to the conventional NEQ approach, this model neglects the influence of liquid side mass‐transfer coefficients, which ultimately allows to come up with only one empirical equation describing the overall mass transfer. Thus, a considerable reduction in model complexity is reached, which allows for an efficient consideration of new experimental distillation results. Fitted to experimental data, the model is able to predict, how different pressures and chemical systems might affect the separation efficiency. By comparing calculation results with experimentally determined separation efficiencies for three different packing types, these valuable RNEQ qualities are illustrated. © 2014 American Institute of Chemical Engineers AIChE J, 60: 3833–3847, 2014

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Metrics

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Citations

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References

Details

Published: Jul 24, 2014
Vol/Issue: 60(11)
Pages: 3833-3847
License: View

Authors

C

Christoph Ehlers

Institute of Process and Plant Engineering, Hamburg University of Technology 21073 Hamburg Germany

G

Georg Fieg

Institute of Process and Plant Engineering, Hamburg University of Technology 21073 Hamburg Germany

Funding

German Federal Ministry of Economics and Technology Award: 2267706WZ2

Cite This Article

Christoph Ehlers, Georg Fieg (2014). Experimental validation of a flexible modeling approach for distillation columns with packings. AIChE Journal, 60(11), 3833-3847. https://doi.org/10.1002/aic.14560

Experimental validation of a flexible modeling approach for distillation columns with packings

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