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Membranes
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Advanced Research on Zeolite Based Membranes
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Advanced Research on Zeolite Based Membranes

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

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 3095

Special Issue Editor

Dr. Zishu Cao

E-Mail Website
Guest Editor
Jasper Department of Chemical Engineering, The University of Texas at Tyler, Tyler, TX 75799, USA
Interests: zeolite membranes

Special Issue Information

Dear Colleagues,

This is Zishu Cao, an assistant professor at the University of Texas at Tyler. I am working with MDPI to guest-edit a Special Issue on zeolite-based membranes in the journal Membranes. Zeolites have uniform sub-nanometer-sized pores defined by their crystal structures, plus great chemical and thermal stability. Those characteristics make them great membrane or filler materials for high-performance membranes. In recent years, there has been continued development on new membrane fabrication methodology, as well as increased exploration of the potential application and advancement of zeolite morphology control, particularly 2D zeolites. All those progresses contribute to vibrant and productive research in the field.

This Special Issue aims to provide a platform for publishing membrane works relevant to zeolites, such as membrane fabrication technologies, membrane scale-up, zeolite crystal morphology control and its application in membrane fabrication, and industrially relevant applications. Both original research and review articles are welcome. The research areas involving zeolite may include (but not be limited to) the following:

  • Membrane synthesis;
  • Mixed matrix/composite membrane;
  • Zeolite structure development and membrane applications;
  • Membrane separation;
  • Membrane contactor;
  • Membrane reactor.

Dr. Zishu Cao
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

  • zeolite
  • membrane separation
  • 2D materials
  • mixed matrix membrane

Published Papers (2 papers)

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Research

12 pages, 1244 KiB  
Article
Evaluation of Physicochemical Properties of Sustained-Release Membranes Based on Analytic Hierarchy
by Haonan Sun, Tao Lei, Xianghong Guo, Jianxin Liu and Jiangjian Lv
Membranes 2023, 13(3), 313; https://doi.org/10.3390/membranes13030313 - 09 Mar 2023
Viewed by 912
Abstract
In this paper, the optimal analytic hierarchy process was used to establish a comprehensive evaluation model for the physicochemical properties of composite sustained-release membrane materials based on water absorption (XS), water permeability (TS), tensile strength (KL), elongation [...] Read more.
In this paper, the optimal analytic hierarchy process was used to establish a comprehensive evaluation model for the physicochemical properties of composite sustained-release membrane materials based on water absorption (XS), water permeability (TS), tensile strength (KL), elongation at break (DSL), fertilizer permeability (TF), and viscosity (ND), and the optimal ratio parameters of membrane material were determined. Analytic hierarchy process (AHP) combined with correlation analysis was used to construct the judgment matrix of physicochemical properties, which passed the consistency test, and to determine the weight and ranking of each index: TF (0.6144) > XS (0.1773) > KL (0.1561) > ND (0.1311) > TS (0.0775) > DSL (0.0520). The comprehensive scores of sustained-release membrane materials under different treatments were calculated based on normalized data samples and weights. It was determined that the percentage of each component in the best comprehensive performance of the slow-release membrane material was as follows: polyvinyl alcohol, polyvinylpyrrolidone, zeolite, and epoxy resin were 7.3%, 0.7%, 0.5%, and 2%, respectively. Full article
(This article belongs to the Special Issue Advanced Research on Zeolite Based Membranes)
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19 pages, 3892 KiB  
Article
Surface Interactions and Nanoconfinement of Methane and Methane plus CO2 Revealed by High-Pressure Magic Angle Spinning NMR Spectroscopy and Molecular Dynamics
by Salim Ok, Siddharth Gautam, Kao-Hsiang Liu and David R. Cole
Membranes 2022, 12(12), 1273; https://doi.org/10.3390/membranes12121273 - 15 Dec 2022
Cited by 3 | Viewed by 1567
Abstract
This study explores the fundamental, molecular- to microscopic-level behavior of methane gas confined into nanoporous silica proxies with different pore diameters and surface-to-volume (S/V) ratios. Surfaces and pore walls of nanoporous silica matrices are decorated with hydroxyl (-OH) groups, resembling natural heterogeneity. High-pressure [...] Read more.
This study explores the fundamental, molecular- to microscopic-level behavior of methane gas confined into nanoporous silica proxies with different pore diameters and surface-to-volume (S/V) ratios. Surfaces and pore walls of nanoporous silica matrices are decorated with hydroxyl (-OH) groups, resembling natural heterogeneity. High-pressure MAS NMR was utilized to characterize the interactions between methane and the engineered nanoporous silica proxies under various temperature and pressure regimes. There was a change in the chemical shift position of confined methane slightly in the mixtures with nanoporous silica up to 393 K, as shown by high-pressure 13C-NMR. The 13C-NMR chemical shift of methane was changed by pressure, explained by the densification of methane inside the nanoporous silica materials. The influence of pore diameter and S/V of the nanoporous silica materials on the behaviors and dynamics of methane were studied. The presence of CO2 in mixtures of silica and methane needs analysis with caution because CO2 in a supercritical state and gaseous CO2 change the original structure of nanoporous silica and change surface area and pore volume. According to simulation, the picosecond scale dynamics of methane confined in larger pores of amorphous silica is faster. In the 4 nm pore, the diffusivity obtained from MD simulations in the pore with a higher S/V ratio is slower due to the trapping of methane molecules in adsorbed layers close to the corrugated pore surface. In contrast, relaxation measured with NMR for smaller pores (higher S/V) exhibits larger T1, indicating slower relaxation. Full article
(This article belongs to the Special Issue Advanced Research on Zeolite Based Membranes)
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