Special Issue "Polymeric Membranes for Gas Separation"

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

Deadline for manuscript submissions: closed (15 October 2018)

Special Issue Editors

Guest Editor
Prof. Haiqing Lin

Department of Chemical and Biological Engineering, University at Buffalo, State University of New York, Buffalo, NY 14260, USA
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Interests: membranes; polymers; CO2 capture; water purification
Guest Editor
Prof. Lu Shao

School of Chemistry and Chemical Engineering Harbin Institute of Technology, China
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Interests: gas separation membrane; nanofiltration; ultrafiltration; functional/smart membrane materials for environmental and energy applications
Guest Editor
Prof. Jianyong Jin

School of Chemical Sciences, University of Auckland, New Zealand
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Interests: advanced polymeric materials; fluorinated polymers; membranes
Guest Editor
Prof. Dr. Ho Bum Park

Department of Energy Engineering, Hanyang University, Seoul 133-791, Korea
Website | E-Mail
Interests: membrane; gas separation; liquid separation; fuel cells

Special Issue Information

Dear Colleagues,

We cordially invite you to submit your original work or review article to this Special Issue of “Polymeric Membranes for Gas Separation”. With inherently high energy-efficiency, membrane-based chemical separation processes have become increasingly important technology for industrial gas separations, and attracted significant interest for emerging societally important applications, such as CO2 capture, natural gas processing, and olefin/paraffin separations. Polymers are the working horse for industrial membranes due to their good processibility, while polymers-based mixed matrix materials (comprising metal organic frameworks, 2-D materials, carbon molecular sieves and ionic liquids) are under extensive exploration to achieve superior separation properties.

This issue is dedicated to recent advances in novel materials and processes for membrane gas separation. The topics of interests include, but not limited to, novel membrane materials (polymers and mixed matrix materials), emerging processes or hybrid processes based on membranes, CO2 capture, novel gas separation applications, techno-economic analysis, computational simulation of advanced membrane materials, configuration and processes, preparation and characterization of thin film composite membranes or hollow fiber membranes, membrane aging, etc.

We are looking forward to receiving your outstanding work for this Special Issue.

Sincerely,

Prof. Haiqing Lin
Prof. Lu Shao
Prof. Jianyong Jin
Prof. Ho Bum Park
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 papers will be 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 1000 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

  • Polymeric membranes
  • Gas separation
  • CO2 capture
  • Mixed matrix materials

Published Papers (5 papers)

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Research

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Open AccessArticle Novel Polymeric Thin-Film Composite Membranes for High-Temperature Gas Separations
Received: 13 March 2019 / Revised: 3 April 2019 / Accepted: 8 April 2019 / Published: 10 April 2019
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Abstract
Novel selective polymeric thin-film composite membranes (TFCMs) for applications at elevated temperatures were developed. Thin selective layers of the polyimides Matrimid 5218® and 6FDA-6FpDA were cast on a developed polybenzimidazole (PBI) porous support prepared by a phase inversion process. The TFCM properties [...] Read more.
Novel selective polymeric thin-film composite membranes (TFCMs) for applications at elevated temperatures were developed. Thin selective layers of the polyimides Matrimid 5218® and 6FDA-6FpDA were cast on a developed polybenzimidazole (PBI) porous support prepared by a phase inversion process. The TFCM properties were investigated with different gases in a wide temperature range, including temperatures up to 270 °C. The membranes showed very high thermal stability and performed well at the elevated temperatures. The development of highly thermally resistant polymeric membranes such as these TFCMs opens opportunities for application in high-temperature integrated processes, such as catalytic membrane reactors for the water-gas shift reaction in order to maximize H2 yield. Full article
(This article belongs to the Special Issue Polymeric Membranes for Gas Separation)
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Open AccessArticle A Novel Time Lag Method for the Analysis of Mixed Gas Diffusion in Polymeric Membranes by On-Line Mass Spectrometry: Pressure Dependence of Transport Parameters
Received: 19 July 2018 / Revised: 27 August 2018 / Accepted: 29 August 2018 / Published: 3 September 2018
Cited by 3 | PDF Full-text (2401 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
This paper presents a novel method for transient and steady state mixed gas permeation measurements, using a quadrupole residual gas analyser for the on-line determination of the permeate composition. The on-line analysis provides sufficiently quick response times to follow even fast transient phenomena, [...] Read more.
This paper presents a novel method for transient and steady state mixed gas permeation measurements, using a quadrupole residual gas analyser for the on-line determination of the permeate composition. The on-line analysis provides sufficiently quick response times to follow even fast transient phenomena, enabling the unique determination of the diffusion coefficient of the individual gases in a gas mixture. Following earlier work, the method is further optimised for higher gas pressures, using a thin film composite and a thick dense styrene-butadiene-styrene (SBS) block copolymer membrane. Finally, the method is used to calculate the CO2/CH4 mixed gas diffusion coefficients of the spirobisfluorene-based polymer of intrinsic microporosity, PIM-SBF-1. It is shown that the modest pressure dependence of the PIM-SBF-1 permeability can be ascribed to a much stronger pressure dependence of the diffusion coefficient, which partially compensates the decreasing solubility of CO2 with increasing pressure, typical for the strong sorption behaviour in PIMs. The characteristics of the instrument are discussed and suggestions are given for even more versatile measurements under stepwise increasing pressure conditions. This is the first report on mixed gas diffusion coefficients at different pressures in a polymer of intrinsic microporosity. Full article
(This article belongs to the Special Issue Polymeric Membranes for Gas Separation)
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Open AccessArticle Effective Conversion of Amide to Carboxylic Acid on Polymers of Intrinsic Microporosity (PIM-1) with Nitrous Acid
Received: 27 March 2018 / Revised: 12 April 2018 / Accepted: 12 April 2018 / Published: 18 April 2018
Cited by 1 | PDF Full-text (5213 KB) | HTML Full-text | XML Full-text
Abstract
Carboxylate-functionalised polymers of intrinsic microporosity (C-PIMs) are highly desirable materials for membrane separation applications. The recently reported method to afford C-PIMs was via an extensive base hydrolysis process requiring 360 h. Herein, a novel and effective method to convert PIM-CONH2 to C-PIM [...] Read more.
Carboxylate-functionalised polymers of intrinsic microporosity (C-PIMs) are highly desirable materials for membrane separation applications. The recently reported method to afford C-PIMs was via an extensive base hydrolysis process requiring 360 h. Herein, a novel and effective method to convert PIM-CONH2 to C-PIM using nitrous acid was studied. The chemical structure of C-PIM was characterised by 1H NMR, 13C NMR, FTIR, elemental analysis, UV-Vis, TGA and TGA-MS. Complete conversion from amide to carboxylic acid groups was confirmed. Decarboxylation of C-PIM was also successfully studied by TGA-MS for the first time, with a loss of m/z 44 amu (CO2) observed at the first degradation stage. TGA also revealed decreased thermal stability of C-PIM relative to PIM-CONH2 under both N2 and air atmosphere. Gel permeation chromatography (GPC) analysis showed continuous molecular weight degradation of C-PIM with extended reaction time. Aromatic nitration was also observed as a side reaction in some cases. Full article
(This article belongs to the Special Issue Polymeric Membranes for Gas Separation)
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Open AccessArticle Gas Separation Properties of Polyimide Thin Films on Ceramic Supports for High Temperature Applications
Received: 2 February 2018 / Revised: 1 March 2018 / Accepted: 5 March 2018 / Published: 7 March 2018
Cited by 4 | PDF Full-text (8108 KB) | HTML Full-text | XML Full-text
Abstract
Novel selective ceramic-supported thin polyimide films produced in a single dip coating step are proposed for membrane applications at elevated temperatures. Layers of the polyimides P84®, Matrimid 5218®, and 6FDA-6FpDA were successfully deposited onto porous alumina supports. In order [...] Read more.
Novel selective ceramic-supported thin polyimide films produced in a single dip coating step are proposed for membrane applications at elevated temperatures. Layers of the polyimides P84®, Matrimid 5218®, and 6FDA-6FpDA were successfully deposited onto porous alumina supports. In order to tackle the poor compatibility between ceramic support and polymer, and to get defect-free thin films, the effect of the viscosity of the polymer solution was studied, giving the entanglement concentration (C*) for each polymer. The C* values were 3.09 wt. % for the 6FDA-6FpDA, 3.52 wt. % for Matrimid®, and 4.30 wt. % for P84®. A minimum polymer solution concentration necessary for defect-free film formation was found for each polymer, with the inverse order to the intrinsic viscosities (P84® ≥ Matrimid® >> 6FDA-6FpDA). The effect of the temperature on the permeance of prepared membranes was studied for H2, CH4, N2, O2, and CO2. As expected, activation energy of permeance for hydrogen was higher than for CO2, resulting in H2/CO2 selectivity increase with temperature. More densely packed polymers lead to materials that are more selective at elevated temperatures. Full article
(This article belongs to the Special Issue Polymeric Membranes for Gas Separation)
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Review

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Open AccessReview Engineering Sub-Nanometer Channels in Two-Dimensional Materials for Membrane Gas Separation
Membranes 2018, 8(4), 100; https://doi.org/10.3390/membranes8040100
Received: 20 September 2018 / Revised: 16 October 2018 / Accepted: 24 October 2018 / Published: 29 October 2018
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Abstract
Sub-nanochannels constructed by stacking two-dimensional (2D) nanosheets in parallel provide a unique molecular separation pathway with excellent size-sieving ability for membrane gas separation. Herein we review the progress in engineering these 2D channels for efficient gas separation including graphene, graphene oxide (GO), molybdenum [...] Read more.
Sub-nanochannels constructed by stacking two-dimensional (2D) nanosheets in parallel provide a unique molecular separation pathway with excellent size-sieving ability for membrane gas separation. Herein we review the progress in engineering these 2D channels for efficient gas separation including graphene, graphene oxide (GO), molybdenum disulfide (MoS2), and MXene. Mixed matrix materials containing these 2D materials in polymers are also reviewed and compared with conventional polymers for gas separation. Full article
(This article belongs to the Special Issue Polymeric Membranes for Gas Separation)
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