Hydrodynamics and mass transfer in liquid-liquid non-circular microchannels : Comparison of two aspect ratios and three junction structures
(2017) In Chemical Engineering Journal 322. p.328-338- Abstract
Hydrodynamics and mass transfer in liquid-liquid slug flow inside a square microchannel (MC-1, aspect ratio 1) and a rectangular microchannel (MC-2, aspect ratio 2) with identical hydraulic diameter (400 µm) were investigated experimentally. The results showed that the overall volumetric mass transfer coefficient (KLa) in MC-2 was 16.2% lower than that in MC-1 due to enlargement of the dispersed phase slugs in MC-2, leading to development of stagnant zones within plugs and reduction of wall film renewal. Three different junction configurations (JC) were studied. KLa was enhanced by up to 34.8% using JC-1, compared to JC-2 or JC-3 due to greater movement of the biphasic interface, resulting in higher mixing within... (More)
Hydrodynamics and mass transfer in liquid-liquid slug flow inside a square microchannel (MC-1, aspect ratio 1) and a rectangular microchannel (MC-2, aspect ratio 2) with identical hydraulic diameter (400 µm) were investigated experimentally. The results showed that the overall volumetric mass transfer coefficient (KLa) in MC-2 was 16.2% lower than that in MC-1 due to enlargement of the dispersed phase slugs in MC-2, leading to development of stagnant zones within plugs and reduction of wall film renewal. Three different junction configurations (JC) were studied. KLa was enhanced by up to 34.8% using JC-1, compared to JC-2 or JC-3 due to greater movement of the biphasic interface, resulting in higher mixing within slugs using JC-1. The junction arrangement influenced not only the mass transfer during the slug-formation stage, but also the slug-flowing stage due to effects on the vortex patterns along the microchannel.
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- author
- Sattari, Mehdi LU ; Nasr Esfahany, Mohsen ; Wu, Zan LU and Sundén, Bengt LU
- organization
- publishing date
- 2017-08-15
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Aspect ratio, Interfacial area, Mass transfer, Microchannel, Mixing junction
- in
- Chemical Engineering Journal
- volume
- 322
- pages
- 11 pages
- publisher
- Elsevier
- external identifiers
-
- wos:000401594200033
- scopus:85017478729
- ISSN
- 1385-8947
- DOI
- 10.1016/j.cej.2017.04.028
- language
- English
- LU publication?
- yes
- id
- 1a051024-81e6-4012-aff4-178d6577d541
- date added to LUP
- 2017-05-08 09:18:30
- date last changed
- 2025-01-06 12:28:22
@article{1a051024-81e6-4012-aff4-178d6577d541,
abstract = {{<p>Hydrodynamics and mass transfer in liquid-liquid slug flow inside a square microchannel (MC-1, aspect ratio 1) and a rectangular microchannel (MC-2, aspect ratio 2) with identical hydraulic diameter (400 µm) were investigated experimentally. The results showed that the overall volumetric mass transfer coefficient (K<sub>L</sub>a) in MC-2 was 16.2% lower than that in MC-1 due to enlargement of the dispersed phase slugs in MC-2, leading to development of stagnant zones within plugs and reduction of wall film renewal. Three different junction configurations (JC) were studied. K<sub>L</sub>a was enhanced by up to 34.8% using JC-1, compared to JC-2 or JC-3 due to greater movement of the biphasic interface, resulting in higher mixing within slugs using JC-1. The junction arrangement influenced not only the mass transfer during the slug-formation stage, but also the slug-flowing stage due to effects on the vortex patterns along the microchannel.</p>}},
author = {{Sattari, Mehdi and Nasr Esfahany, Mohsen and Wu, Zan and Sundén, Bengt}},
issn = {{1385-8947}},
keywords = {{Aspect ratio; Interfacial area; Mass transfer; Microchannel; Mixing junction}},
language = {{eng}},
month = {{08}},
pages = {{328--338}},
publisher = {{Elsevier}},
series = {{Chemical Engineering Journal}},
title = {{Hydrodynamics and mass transfer in liquid-liquid non-circular microchannels : Comparison of two aspect ratios and three junction structures}},
url = {{http://dx.doi.org/10.1016/j.cej.2017.04.028}},
doi = {{10.1016/j.cej.2017.04.028}},
volume = {{322}},
year = {{2017}},
}