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Membranes
Special Issues
Advanced Membrane System for CO2 Separation and Conversion
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Advanced Membrane System for CO2 Separation and Conversion

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Membrane Applications".

Deadline for manuscript submissions: closed (31 July 2022) | Viewed by 3504

Special Issue Editors

Dr. Rijia Lin

E-Mail Website
Guest Editor
School of Chemical Engineering, University of Queensland, Brisbane, QLD 4072, Australia
Interests: metal-organic framework materials; gas separation membranes; membrane synthesis; polymeric membranes; mixed-matrix membranes; composite membranes
Dr. Jingwei Hou

E-Mail Website
Guest Editor
School of Chemical Engineering, University of Queensland, St Lucia, QLD 4072, Australia
Interests: condense phase physics; Janus membranes; biocatalytic membrane reactors; gas separation membranes
Special Issues, Collections and Topics in MDPI journals
Dr. Mengran Li

E-Mail Website
Guest Editor
Faculty of Applied Sciences, Dept. of Chemical Engineering, Delft University of Technology, Gebouw B58, Kamer D1.300 Van der Maasweg 9, 2629 HZ Delft, The Netherlands
Interests: CO2 electrolysis; electrocatalysis; interface; fuel cells

Special Issue Information

Dear Colleagues,

Separation and conversion of CO2 at low cost is a significant scientific and engineering challenge in many industrial applications. The membrane process is recognised as an energy-efficient and environmentally friendly technology for CO2 separation. However, there are still knowledge gaps in the areas of separation mechanisms, operational stability, material selection, and up-scaling. In addition to CO2 separation, low-cost CO2 conversion has been considered an important part of the energy and environmental sciences. Electrochemical conversion of carbon dioxide into valuable chemicals and fuels shows great promise in neutralising carbon dioxide emissions from carbon-intensive industries such as iron–steel making and cement manufacturing. Recent efforts have notably enhanced current densities and product selectivity of the CO2 electrolysis technology mainly by applying membrane–electrode assembly configuration. However, the practical application of this technology is still impeded by critical challenges such as poor gas–liquid management, CO2 loss due to carbonation and membrane cross-over, and membrane–electrode delamination. Addressing these challenges urgently requires the advancement of ion-exchange membranes and membrane–electrode interfaces.

This Special Issue on “Advanced membrane system for CO2 separation and conversion” of the journal Membranes is looking forward to contributions to the understanding of the mechanisms and further advancement in the field of CO2 separation membranes, ion-exchange membranes and membrane–catalyst interfaces for electrochemical conversion of CO2. Authors are invited to submit their latest results, both original papers and reviews are welcome.

Dr. Jingwei Hou
Dr. Rijia Lin
Dr. Mengran Li
Guest Editors

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

  • greenhouse gas capture
  • gas separation membranes
  • transport mechanism
  • operational stability
  • ion-exchange membranes
  • membrane–electrode assembly
  • catalytic interface

Published Papers (1 paper)

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Research

17 pages, 6310 KiB  
Article
Controlled Covalent Functionalization of ZIF-90 for Selective CO2 Capture & Separation
by Muhammad Usman, Mohd Yusuf Khan, Tanzila Anjum, Asim Laeeq Khan, Bosirul Hoque, Aasif Helal, Abbas Saeed Hakeem and Bassem A. Al-Maythalony
Membranes 2022, 12(11), 1055; https://doi.org/10.3390/membranes12111055 - 27 Oct 2022
Cited by 12 | Viewed by 3089
Abstract
Mixed Matrix Membranes (MMM) with enhanced selectivity and permeability are preferred for gas separations. The porous metal-organic frameworks (MOFs) materials incorporated in them play a crucial part in improving the performance of MMM. In this study, Zeolitic imidazolate frameworks (ZIF-90) are selected to [...] Read more.
Mixed Matrix Membranes (MMM) with enhanced selectivity and permeability are preferred for gas separations. The porous metal-organic frameworks (MOFs) materials incorporated in them play a crucial part in improving the performance of MMM. In this study, Zeolitic imidazolate frameworks (ZIF-90) are selected to fabricate Polyetherimide (PEI) MMMs owing to their lucrative structural and chemical properties. This work reports new controlled post-synthetic modifications of ZIF-90 (50-PSM-ZIF-90) with ethanolamine to control the diffusion and uptake of CO2. Physical and chemical properties of ZIF-90, such as stability and presence of aldehyde functionality in the imidazolate linker, allow for easy modulation of the ZIF-90 pores and window size to tune the gas transport properties across ZIF-90-based membranes. Effects of these materials were investigated on the performance of MMMs and compared with pure PEI membranes. Performance of the MMMs was evaluated in terms of permeability of different gases and selective separation of CO2 and H2 gas. Results presented that the permeability of all membranes was in the following order, i.e., P(H2) > P(CO2) > P(O2) > P(CH4) > P(C2H6) > P(C3H8) > P(N2), demonstrating that kinetic gas diffusion is the predominant gas transport mode in these membranes. Among all the membranes, permeability of pure PEI membrane was highest for all gases due to the uniform porous morphology. The pure PEI membrane showed highest permeability of H2, which is 486.5 Barrer, followed by 49 Barrer for O2, 29 Barrer for N2, 142 Barrer for CO2, 41 Barrer for CH4, 40 Barrer for C2H6 and 39.6 Barrer for C3H8. Results also confirm the superiority of controlled PSM-ZIF-90-PEI membrane over the pure PEI and ZIF-90-PEI membranes in CO2 and H2 separation performance. The 50-PSM-ZIF-90 PEI membrane exhibited a 20% increase in CO2 separation from methane and a 26% increase over nitrogen compared to the ZIF-90-PEI membrane. The 50-PSM-ZIF-90 PEI membrane showed 15% more H2/O2 separation and 9% more H2/CH4 separation than ZIF-90 PEI membrane. Overall, this study represents the role of controlled PSM in enhancing the property of new materials like ZIF and its application in MMMs fabrication to develop a promising approach for the CO2 capture and separation. Full article
(This article belongs to the Special Issue Advanced Membrane System for CO2 Separation and Conversion)
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