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Membranes
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Liquid Membranes and Membrane Contactors: Recent Developments and Applications for...
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Liquid Membranes and Membrane Contactors: Recent Developments and Applications for a Greener and More Sustainable Industry

A special issue of Membranes (ISSN 2077-0375).

Deadline for manuscript submissions: closed (20 November 2023) | Viewed by 2868

Special Issue Editors

Dr. Alan D. Pérez

E-Mail Website
Guest Editor
Hochschule für Life Sciences FHNW, Muttenz, Switzerland
Interests: process intensification; membrane technology; biotechnology; process transfer and scale-up
Prof. Dr. Antonia Pérez de los Ríos

E-Mail Website
Guest Editor
Department of Chemical Engineering, University of Murcia, Campus de Espinardo, 30071 Murcia, Spain
Interests: ionic liquid; green chemistry; membrane technology; fuel cell; biofuel
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Membrane contactors (MCs) and liquid membranes (LMs) promote contact between two and three fluid phases for the efficient transfer of specific compounds in gases or liquids, allowing their separation and concentration. This versatility in the type of contact between the fluid phases allows both MCs and LMs to be applied in various types of processes, such as in situ product removal, pharmaceutical product recovery/separation, wastewater treatment, CO2 capture/separation, metal separation/concentration, and water desalination, among others. Currently, MC and LM research is on the rise, and much of this research is aimed at making processes greener and more sustainable, attracting the attention of various industries, including chemical, biochemical, pharmaceutical, food, cosmetics, metallurgy and agriculture. Therefore, this Special Issue focuses on new developments and applications of MCs and LMs to improve processes in various industries by making them greener and more sustainable.

Dr. Alan D. Pérez
Prof. Dr. Antonia Pérez de los Ríos
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Membranes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • membrane contactor
  • liquid membrane
  • sustainable
  • process intensification by means of MCs and LMs

Published Papers (2 papers)

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Research

17 pages, 1444 KiB  
Article
Treatment of Stainless Steel Rinse Waters Using Non-Dispersive Extraction and Strip Dispersion Membrane Technology
by Francisco Jose Alguacil and Jose Ignacio Robla
Membranes 2023, 13(12), 902; https://0-doi-org.brum.beds.ac.uk/10.3390/membranes13120902 - 06 Dec 2023
Cited by 1 | Viewed by 1289
Abstract
The extraction of Fe(III), Cr(III), and Ni(II) from stainless steel rinse water using non-dispersive extraction and strip dispersion membrane technology was carried out in a microporous hydrophobic hollow-fibre module contactor. The fibres were of polypropylene, whereas the organic extractant DP8R (bis(2-ethylhexyl) phosphoric acid) [...] Read more.
The extraction of Fe(III), Cr(III), and Ni(II) from stainless steel rinse water using non-dispersive extraction and strip dispersion membrane technology was carried out in a microporous hydrophobic hollow-fibre module contactor. The fibres were of polypropylene, whereas the organic extractant DP8R (bis(2-ethylhexyl) phosphoric acid) diluted in ExxsolD100 was used as the carrier phase. The rinse water containing the three elements was passed through the tube side, and the pseudo-emulsion formed by the organic phase of DP8R in Exxol D100 and an acidic strip solution were passed through the shell side in a counter-current operation; thus, a unique hollow fibre module was used for extraction and stripping. In non-dispersive extraction and strip dispersion technology, the stripping solution was dispersed into the organic membrane solution in a vessel with an adequate mixing device (impeller) designed to form strip dispersion. This pseudo-emulsion was circulated from the vessel to the membrane module to provide a constant supply of the organic phase to the membrane pores. Different hydrodynamic and chemical variables, such as variation in feed and pseudo-emulsion flow rates, strip phase composition, feed phase pH, and extractant concentration in the organic phase, were investigated. Mass transfer coefficients were estimated from the experimental data. It was possible to separate and concentrate the metals present in the rinse water using the non-dispersive extraction and strip dispersion technique. Full article
(This article belongs to the Special Issue Liquid Membranes and Membrane Contactors: Recent Developments and Applications for a Greener and More Sustainable Industry)
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15 pages, 2283 KiB  
Article
A Simplified Kinetic Modeling of CO2 Absorption into Water and Monoethanolamine Solution in Hollow-Fiber Membrane Contactors
by Mai Lien Tran, Chi Hieu Nguyen, Kuan-Yan Chu and Ruey-Shin Juang
Membranes 2023, 13(5), 494; https://0-doi-org.brum.beds.ac.uk/10.3390/membranes13050494 - 05 May 2023
Viewed by 1182
Abstract
The absorption of CO2 from CO2-N2 gas mixtures using water and monoethanolamine (MEA) solution in polypropylene (PP) hollow-fiber membrane contactors was experimentally and theoretically examined. Gas was flowed through the lumen of the module, whereas the absorbent liquid was [...] Read more.
The absorption of CO2 from CO2-N2 gas mixtures using water and monoethanolamine (MEA) solution in polypropylene (PP) hollow-fiber membrane contactors was experimentally and theoretically examined. Gas was flowed through the lumen of the module, whereas the absorbent liquid was passed counter-currently across the shell. Experiments were carried out under various gas- and liquid-phase velocities as well as MEA concentrations. The effect of pressure difference between the gas and liquid phases on the flux of CO2 absorption in the range of 15–85 kPa was also investigated. A simplified mass balance model that considers non-wetting mode as well as adopts the overall mass-transfer coefficient evaluated from absorption experiments was proposed to follow the present physical and chemical absorption processes. This simplified model allowed us to predict the effective length of the fiber for CO2 absorption, which is crucial in selecting and designing membrane contactors for this purpose. Finally, the significance of membrane wetting could be highlighted by this model while using high concentrations of MEA in the chemical absorption process. Full article
(This article belongs to the Special Issue Liquid Membranes and Membrane Contactors: Recent Developments and Applications for a Greener and More Sustainable Industry)
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