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Type: Artigo de periódico
Title: Mass Transfer In Extractive Distillation Of Ethanol/water By Packed Columns
Author: Meirelles A.
Telis V.
Abstract: Extractive distillation has already proved to be an economically and technically feasible alternative in the separation of close boiling compounds or azeotropic mixtures. The kind of solvent generally used in extractive distillation has low volatility in order to prevent its vaporization with the overhead product and to maintain a high concentration in the liquid phase. Furthermore, the solvent is often comparatively viscous. These factors might be responsible for a decrease in the efficiency of mass transfer during the operation. The present paper reports the effect of solvent concentration on mass transfer coefficients in extractive distillation. It also compares some of the existing empirical correlations used for estimating mass transfer coefficients in packed columns. A new specific correlation for liquid film mass transfer in extractive distillation is presented. (from Authors)
Rights: aberto
Identifier DOI: 
Date Issue: 1994
Appears in Collections:Unicamp - Artigos e Outros Documentos

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