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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20401 - Chemical engineering (plants, products)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Chemical Engineering Research and Design

ISSN

0263-8762

e-ISSN

—

Svazek periodika

148

Číslo periodika v rámci svazku

August

Stát vydavatele periodika

SG - Singapurská republika

Počet stran výsledku

13

Strana od-do

129-141

Kód UT WoS článku

000480374700011

EID výsledku v databázi Scopus

2-s2.0-85067386036