Special Issue "Zeolitic Membranes: Advances and Applications"

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

Deadline for manuscript submissions: closed (31 July 2018)

Special Issue Editor

Guest Editor
Prof. Shunsuke Tanaka

Department of Chemical, Energy and Environmental Engineering, Faculty of Environmental and Urban Engineering, Kansai University
Website | E-Mail
Interests: zeolite; metal–organic frameworks; nanostructured materials; mixed matrix membrane; gas separation; liquid separation; synthesis; characterization

Special Issue Information

Dear Colleagues,

Membrane separation is one of the most critical and challenging steps for industrial processes, and zeolite and zeolitic metal–organic framework (MOF) membranes are potential candidates for this application. This Special Issue on “Zeolitic Membranes: Advances and Applications” focuses on the recent theoretical and experimental advances in materials chemistry, membrane synthesis, processing, characterization, simulation and improving performance, including the issues faced in the design and growth of membranes for practical applications.

The topics of interests include, but are not limited to, the following: separation of hydrocarbons from crude oil; H2 purification and recycling; CO2 removal from dilute emissions; O2 and N2 enrichment; separation of alkenes from alkanes; separation of benzene derivatives from each other; dehydration system; removal of trace contaminants from water; removal of VOCs from aqueous or gas streams; chiral resolution, etc.

Authors are, therefore, cordially invited to submit their exciting works and research findings in the form of original research papers, technical communications and review articles for publication in the journal Membranes.

Prof. Shunsuke Tanaka
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 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

  • Zeolite
  • Metal–organic frameworks
  • Nanostructured materials
  • Mixed matrix membrane
  • Gas separation
  • Liquid separation
  • Synthesis
  • Characterization

Published Papers (4 papers)

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Research

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Open AccessFeature PaperArticle Effects of Silica-Particle Coating on a Silica Support for the Fabrication of High-Performance Silicalite-1 Membranes by Gel-Free Steam-Assisted Conversion
Received: 26 February 2019 / Revised: 26 March 2019 / Accepted: 27 March 2019 / Published: 1 April 2019
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Abstract
Silicalite-1 membranes with high pervaporation performance were prepared successfully on a silica-particle-coated tubular silica support using a gel-free steam-assisted conversion (SAC) method. The effects of the silica-particle layer formed on the top surface of the silica support and the physical properties of the [...] Read more.
Silicalite-1 membranes with high pervaporation performance were prepared successfully on a silica-particle-coated tubular silica support using a gel-free steam-assisted conversion (SAC) method. The effects of the silica-particle layer formed on the top surface of the silica support and the physical properties of the silica particles themselves on the membrane-formation process were investigated. The silica particles coated served as the additional silica source for growing the silicalite-1 seed crystal layer into the silicalite-1 membrane. As a result, it was possible to form a dense and continuous membrane even under gel-free conditions. Furthermore, it was found that the properties of the silica particles, such as their primary particle diameter, had a determining effect on their solubility during the steam treatment, that is, on the supply rate of the silica source. The silicalite-1 membrane obtained using the spherical-silica-particle-coated support had an approximately 9-μm-thick separation layer and showed very high pervaporation performance, exhibiting a separation factor of 105 and a flux of 3.72 kg m−2 h−1 for a 10 wt % ethanol/water mixture at 323 K. Thus, the gel-free SAC method can be used with a silica support coated with silica particles to readily prepare high-performance membranes without producing any chemical waste. Full article
(This article belongs to the Special Issue Zeolitic Membranes: Advances and Applications)
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Open AccessArticle Impact on CO2/N2 and CO2/CH4 Separation Performance Using Cu-BTC with Supported Ionic Liquids-Based Mixed Matrix Membranes
Received: 30 August 2018 / Revised: 28 September 2018 / Accepted: 8 October 2018 / Published: 11 October 2018
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Abstract
The efficient separation of gases has industrial, economic, and environmental importance. Here, we report the improvement in gas separation performance of a polyimide-based matrix (Matrimid®5218) filled with a Cu-based metal organic framework [MOF, Cu3(BTC)2] with two different [...] Read more.
The efficient separation of gases has industrial, economic, and environmental importance. Here, we report the improvement in gas separation performance of a polyimide-based matrix (Matrimid®5218) filled with a Cu-based metal organic framework [MOF, Cu3(BTC)2] with two different ionic liquids (ILs) confined within the pores. The chosen ILs are commonly used in gas solubilization, 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF4]) and 1-Ethyl-3-methylimidazolium trifluoromethanesulfonate ([EMIM][OTf]), and the incorporation of the [EMIM][BF4]@Cu-BTC and [EMIM][OTf]@Cu-BTC composites in Matrimid®5218 proved to be an efficient strategy to improve the permeability and selectivity toward CO2/N2 and CO2/CH4 mixtures. Full article
(This article belongs to the Special Issue Zeolitic Membranes: Advances and Applications)
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Open AccessArticle Single Gas Permeance Performance of High Silica SSZ-13 Zeolite Membranes
Received: 10 June 2018 / Revised: 4 July 2018 / Accepted: 10 July 2018 / Published: 13 July 2018
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Abstract
Continuous and high silica SSZ-13 zeolite membranes were prepared on porous mullite supports from high SiO2/Al2O3 ratio or aluminum-free precursor synthesis gel. Single gas permeance (CO2 and CH4) of the high silica SSZ-13 zeolite membrane [...] Read more.
Continuous and high silica SSZ-13 zeolite membranes were prepared on porous mullite supports from high SiO2/Al2O3 ratio or aluminum-free precursor synthesis gel. Single gas permeance (CO2 and CH4) of the high silica SSZ-13 zeolite membrane was decreased with the SiO2/Al2O3 ratio in the precursor synthesis gel, while the ideal CO2/CH4 selectivity of the membrane was gradually increased. Moreover, effects of synthesis conditions (such as H2O/SiO2 and RNOH/SiO2 ratios of precursor synthesis gel, crystallization time) on the single gas permeance performance of high silica SSZ-13 zeolite membranes were studied in detail. Medium H2O/SiO2 and RNOH/SiO2 ratios in the initial synthesis gel were crucial to prepare the good CO2 perm-selective SSZ-13 zeolite membrane. When the molar composition of precursor synthesis gel, crystallization temperature and time were 1.0 SiO2: 0.1 Na2O: 0.1 TMAdaOH: 80 H2O, 160 °C and 48 h, CO2 permeance and ideal CO2/CH4 selectivity of the SSZ-13 zeolite membrane were 0.98 × 10−7 mol/(m2·s·Pa) and 47 at 25 °C and 0.4 MPa. In addition, the SiO2/Al2O3 ratio of the corresponding SSZ-13 zeolite was 410 by X-ray fluorescence spectroscopy. Full article
(This article belongs to the Special Issue Zeolitic Membranes: Advances and Applications)
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Review

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Open AccessReview Progress on Incorporating Zeolites in Matrimid®5218 Mixed Matrix Membranes towards Gas Separation
Received: 25 May 2018 / Revised: 11 June 2018 / Accepted: 13 June 2018 / Published: 14 June 2018
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Abstract
Membranes, as perm-selective barriers, have been widely applied for gas separation applications. Since some time ago, pure polymers have been used mainly for the preparation of membranes, considering different kinds of polymers for such preparation. At this point, polyimides (e.g., Matrimid®5218) [...] Read more.
Membranes, as perm-selective barriers, have been widely applied for gas separation applications. Since some time ago, pure polymers have been used mainly for the preparation of membranes, considering different kinds of polymers for such preparation. At this point, polyimides (e.g., Matrimid®5218) are probably one of the most considered polymers for this purpose. However, the limitation on the performance relationship of polymeric membranes has promoted their enhancement through the incorporation of different inorganic materials (e.g., zeolites) into their matrix. Therefore, the aim of this work is to provide an overview about the progress of zeolite embedding in Matrimid®5218, aiming at the preparation of mixed matrix membranes for gas separation. Particular attention is paid to the relevant experimental results and current findings. Finally, we describe the prospects and future trends in the field. Full article
(This article belongs to the Special Issue Zeolitic Membranes: Advances and Applications)
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