Liquid phase axial mixing in distillation column packed with structured packing: Effect on column performance

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F19%3A43918683" target="_blank" >RIV/60461373:22340/19:43918683 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0263876219302400?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0263876219302400?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cherd.2019.05.030" target="_blank" >10.1016/j.cherd.2019.05.030</a>

Result language

angličtina

Original language name

Liquid phase axial mixing in distillation column packed with structured packing: Effect on column performance

Original language description

We present values of the Bodenstein number, Bo(L), characterizing liquid phase axial mixing, for the atmospheric distillation of three binary mixtures of primary alcohols and a mixture of cyclohexane/n-heptane, all of which were distilled in a column packed with Mellapak 250.Y or Mellapak 452.Y. In addition, volumetric mass transfer coefficients (k(L)a, k(G)a) were evaluated from the experimental composition profiles along the distillation column. To describe the distillation process, axial mixing in the phases was considered and modelled as axial dispersion. The results of our modelling call for a reassessment of the relative importance of the process-affecting phenomena. In particular, while vapour phase mass transfer resistance was confirmed as most important, liquid phase axial mixing is shown to have a significant impact under all conditions. For the C-6/C-7 mixture on Mellapak 452.Y, liquid phase mass transfer resistance was negligible when axial mixing was taken into account. Conversely, non-zero liquid phase mass transfer resistance was found for the alcohol mixtures in all cases. However, our investigation revealed that this is most likely a relic of the usage of the simplistic plug flow model. (C) 2019 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20401 - Chemical engineering (plants, products)

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Chemical Engineering Research and Design

ISSN

0263-8762

e-ISSN

—

Volume of the periodical

148

Issue of the periodical within the volume

August

Country of publishing house

SG - SINGAPORE

Number of pages

13

Pages from-to

129-141

UT code for WoS article

000480374700011

EID of the result in the Scopus database

2-s2.0-85067386036