Cover Image

Membrane compaction, internal fouling, and membrane preconditioning as major factors affecting performance of solvent resistant nanofiltration membranes in methanol solutions

The viability of using solvent-resistant nanofiltration (SRNF) membranes for concentration of a methanol solution containing a mixture of methyl lactate (ML), glycoaldehyde dimethyl acetal (GLAD), and methylvinylglycolate (MVG) was evaluated in this study. The highest retention was achieved with the...

Full description

Saved in:
Bibliographic Details
Main Authors: Sigurdardóttir, Sigyn Björk, Mohd Shafiq, Mohd Sueb, Pinelo, Manuel
Format: Article
Language:English
Published: Elsevier 2019
Subjects:
TP Chemical technology
Online Access:http://umpir.ump.edu.my/id/eprint/25635/1/Membrane%20compaction%2C%20internal%20fouling%2C%20and%20membrane%20preconditioning.pdf
http://umpir.ump.edu.my/id/eprint/25635/
https://doi.org/10.1016/j.seppur.2019.115686
https://doi.org/10.1016/j.seppur.2019.115686
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.ump.umpir.25635
record_format eprints
spelling my.ump.umpir.256352019-11-21T01:46:27Z http://umpir.ump.edu.my/id/eprint/25635/ Membrane compaction, internal fouling, and membrane preconditioning as major factors affecting performance of solvent resistant nanofiltration membranes in methanol solutions Sigurdardóttir, Sigyn Björk Mohd Shafiq, Mohd Sueb Pinelo, Manuel TP Chemical technology The viability of using solvent-resistant nanofiltration (SRNF) membranes for concentration of a methanol solution containing a mixture of methyl lactate (ML), glycoaldehyde dimethyl acetal (GLAD), and methylvinylglycolate (MVG) was evaluated in this study. The highest retention was achieved with the GE AG membrane at 60 bars, compared to NF 270, Desal DK, and BW 30 membranes, where the retention was 20–30% lower at the same pressure. All membranes except NF 270 showed a high compaction effect at pressures above 40 bars, which explained the low flux and high retention at high pressures. Preconditioning the membranes with pure ethanol or methanol resulted in no differences in flux compared to the virgin membrane, which was in agreement with the “clustering effect” of the hydrophilic groups, which predicts same hydrophilicity but larger (and fewer) pores on the membrane surface. On the contrary, when the membranes were preconditioned with 50/50 alcohol mixtures of methanol or ethanol and water, a general decrease of flux and retention increase was observed, which was ascribed to the previously reported “pore wetting” effect exerted by water in alcohol mixtures. Increasing pH of the feed solution from 4 to 7 also caused decreases of flux and retention, which was explained by the increased internal fouling due to pore swelling. The results from this study suggest that the balance between compaction of the membrane due to high pressure and the pore size enlargement resulting from swelling and reorganization of the polymer chains of the membrane when subjected to organic solvents determines the size exclusion efficiency and susceptibility of the membrane to internal fouling, which in turn determine the performance of the membrane in terms of retention and flux. Elsevier 2019-11-15 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/25635/1/Membrane%20compaction%2C%20internal%20fouling%2C%20and%20membrane%20preconditioning.pdf Sigurdardóttir, Sigyn Björk and Mohd Shafiq, Mohd Sueb and Pinelo, Manuel (2019) Membrane compaction, internal fouling, and membrane preconditioning as major factors affecting performance of solvent resistant nanofiltration membranes in methanol solutions. Separation and Purification Technology, 227. pp. 1-2. ISSN 1383-5866 https://doi.org/10.1016/j.seppur.2019.115686 https://doi.org/10.1016/j.seppur.2019.115686
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Sigurdardóttir, Sigyn Björk
Mohd Shafiq, Mohd Sueb
Pinelo, Manuel
Membrane compaction, internal fouling, and membrane preconditioning as major factors affecting performance of solvent resistant nanofiltration membranes in methanol solutions
description The viability of using solvent-resistant nanofiltration (SRNF) membranes for concentration of a methanol solution containing a mixture of methyl lactate (ML), glycoaldehyde dimethyl acetal (GLAD), and methylvinylglycolate (MVG) was evaluated in this study. The highest retention was achieved with the GE AG membrane at 60 bars, compared to NF 270, Desal DK, and BW 30 membranes, where the retention was 20–30% lower at the same pressure. All membranes except NF 270 showed a high compaction effect at pressures above 40 bars, which explained the low flux and high retention at high pressures. Preconditioning the membranes with pure ethanol or methanol resulted in no differences in flux compared to the virgin membrane, which was in agreement with the “clustering effect” of the hydrophilic groups, which predicts same hydrophilicity but larger (and fewer) pores on the membrane surface. On the contrary, when the membranes were preconditioned with 50/50 alcohol mixtures of methanol or ethanol and water, a general decrease of flux and retention increase was observed, which was ascribed to the previously reported “pore wetting” effect exerted by water in alcohol mixtures. Increasing pH of the feed solution from 4 to 7 also caused decreases of flux and retention, which was explained by the increased internal fouling due to pore swelling. The results from this study suggest that the balance between compaction of the membrane due to high pressure and the pore size enlargement resulting from swelling and reorganization of the polymer chains of the membrane when subjected to organic solvents determines the size exclusion efficiency and susceptibility of the membrane to internal fouling, which in turn determine the performance of the membrane in terms of retention and flux.
format Article
author Sigurdardóttir, Sigyn Björk
Mohd Shafiq, Mohd Sueb
Pinelo, Manuel
author_facet Sigurdardóttir, Sigyn Björk
Mohd Shafiq, Mohd Sueb
Pinelo, Manuel
author_sort Sigurdardóttir, Sigyn Björk
title Membrane compaction, internal fouling, and membrane preconditioning as major factors affecting performance of solvent resistant nanofiltration membranes in methanol solutions
title_short Membrane compaction, internal fouling, and membrane preconditioning as major factors affecting performance of solvent resistant nanofiltration membranes in methanol solutions
title_full Membrane compaction, internal fouling, and membrane preconditioning as major factors affecting performance of solvent resistant nanofiltration membranes in methanol solutions
title_fullStr Membrane compaction, internal fouling, and membrane preconditioning as major factors affecting performance of solvent resistant nanofiltration membranes in methanol solutions
title_full_unstemmed Membrane compaction, internal fouling, and membrane preconditioning as major factors affecting performance of solvent resistant nanofiltration membranes in methanol solutions
title_sort membrane compaction, internal fouling, and membrane preconditioning as major factors affecting performance of solvent resistant nanofiltration membranes in methanol solutions
publisher Elsevier
publishDate 2019
url http://umpir.ump.edu.my/id/eprint/25635/1/Membrane%20compaction%2C%20internal%20fouling%2C%20and%20membrane%20preconditioning.pdf
http://umpir.ump.edu.my/id/eprint/25635/
https://doi.org/10.1016/j.seppur.2019.115686
https://doi.org/10.1016/j.seppur.2019.115686
_version_ 1651866933547499520
score 13.211869

Similar Items