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Membranes
Special Issues
Thermodynamics and Kinetics of Membrane and Reactive Mass-Exchange Processes
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Thermodynamics and Kinetics of Membrane and Reactive Mass-Exchange Processes

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

Deadline for manuscript submissions: closed (31 May 2022) | Viewed by 8453

Special Issue Editor

Prof. Dr. Alexander Toikka

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Guest Editor
Department of Chemical Thermodynamics and Kinetics, Institute of Chemistry, St. Petersburg State University, Universitetskiy Prospect, 26, Peterhof, 198504 Saint Petersburg, Russia
Interests: polymeric membranes; pervaporation; gas separation; ultrafiltration; thermodynamic and thermochemical properties; non-equilibrium thermodynamics; modeling
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue (SI) focuses on thermodynamic analysis and description of peculiarities of membrane processes. Particular attention will be paid to the theoretical description and modeling of mass transfer, taking into account the features of the structure of membrane materials and developing fundamental approaches to the kinetics of membrane processes under various conditions. The SI will include papers related not only to thermodynamic and kinetic problems of membrane separation of liquid and gas mixtures, but also to the results of work in the field of hybrid processes, including the stages of chemical reaction and interphase transfer. New experimental data on these coupled reaction-mass exchange processes should also be accompanied by a theoretical analysis of the new regularities. Such expansion of the thematic SI is determined by modern trends in energy and resource-saving technologies, including the problems of green chemistry. It is also possible to include results related to the properties of new membrane materials that determine the features of the process mechanism. At the same time, the main aim of SI is limited to the classical processes of separation of liquid and gas mixtures and analysis of their behavior in membrane material during mass transfer (for example, pervaporation, ultrafiltration, gas separation, and other membrane processes). For the purposes of theoretical analysis, methods of non-equilibrium thermodynamics, thermodynamic modeling, molecular dynamic simulation, quantum chemistry, and other modern approaches can be used.

I hope that SI will be useful for researchers interested in fundamental investigation of membrane processes, primarily their thermodynamic and kinetic analysis.

Prof. Dr. Alexander Toikka
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 2200 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

  • Thermodynamics of membrane processes
  • Kinetics of membrane processes
  • Modeling
  • Non-equilibrium thermodynamics
  • Polymeric membranes
  • Pervaporation
  • Ultrafiltration
  • Gas permeation
  • Reactive mass-exchange processes
  • Coupled processes
  • Theoretical analysis

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Published Papers (3 papers)

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Research

13 pages, 639 KiB  
Article
Simulation Study of Chain-like Body Translocation through Conical Pores in Thick Membranes
by Zbigniew Domański and Andrzej Z. Grzybowski
Membranes 2022, 12(2), 138; https://doi.org/10.3390/membranes12020138 - 24 Jan 2022
Cited by 2 | Viewed by 2565
Abstract
Artificial membranes with conical pores and controllable thickness reveal ionic-transport capabilities that are superior compared with those offered by cylindrical pores. By simulating the translocation of an abstract chain-like body through a conical pore in a membrane with a variable thickness, we formulate [...] Read more.
Artificial membranes with conical pores and controllable thickness reveal ionic-transport capabilities that are superior compared with those offered by cylindrical pores. By simulating the translocation of an abstract chain-like body through a conical pore in a membrane with a variable thickness, we formulate a statistical model of the translocation time τ. Our rough model encodes the biochemical details of a given real chain-like molecule as evolving sequences of the allowed chain-like body’s conformations. In our simulation experiments, we focus primarily on pore geometry and kinetic aspects of the translocation process. We study the impact of the membrane thickness L, and both conical-pore diameters ϕcis,ϕtrans on the probability distribution of τ. We have found that for all considered simulation setups, the randomness of τ is accurately described by the family of Moyal distributions while its expected value τ is proportional to Lξ, with ξ being dependent on ϕcis,ϕtrans. Full article
(This article belongs to the Special Issue Thermodynamics and Kinetics of Membrane and Reactive Mass-Exchange Processes)
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7 pages, 2532 KiB  
Communication
Comparative Atomic-Level Analysis of Sorption and Diffusion Properties of Membrane Materials on the Base of Polymer and Its Prepolymer: A Case Study of Polyheteroarylenes
by Andrey V. Petrov and Alexander M. Toikka
Membranes 2021, 11(12), 925; https://doi.org/10.3390/membranes11120925 - 25 Nov 2021
Viewed by 1659
Abstract
The sorption properties of polymers and the mobility of penetrants are the main factors which determine the trans-membrane processes. Other factors concern the membrane material structure and chemical nature. In this paper, we consider the case of polymers with similar structure units, namely [...] Read more.
The sorption properties of polymers and the mobility of penetrants are the main factors which determine the trans-membrane processes. Other factors concern the membrane material structure and chemical nature. In this paper, we consider the case of polymers with similar structure units, namely a polymer and its pre-polymer (polybenzoxazinoneimide and imide-containing polyamic acid). The available experimental data show a great difference in the pervaporation process using these two polymeric membranes. Some explanation of this difference can be found at the atomic-level study. A comparative analysis of the diffusion of water and isopropanol molecules was carried out using the density functional theory and molecular dynamics simulations Full article
(This article belongs to the Special Issue Thermodynamics and Kinetics of Membrane and Reactive Mass-Exchange Processes)
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16 pages, 4090 KiB  
Article
Alicyclic Polyimide/SiO2 Mixed Matrix Membranes for Water/n-Butanol Pervaporation
by Ching-Wen Hsieh, Bo-Xian Li and Shing-Yi Suen
Membranes 2021, 11(8), 564; https://doi.org/10.3390/membranes11080564 - 27 Jul 2021
Cited by 9 | Viewed by 3225
Abstract
Alicyclic polyimides (PIs) have excellent properties in solubility, mechanical strength, thermal property, etc. This study developed two types of alicyclic PI-based mixed matrix membranes (MMMs) for water/n-butanol pervaporation application, which have never been investigated previously. The fillers were hydrophilic SiO2 nanoparticles. The [...] Read more.
Alicyclic polyimides (PIs) have excellent properties in solubility, mechanical strength, thermal property, etc. This study developed two types of alicyclic PI-based mixed matrix membranes (MMMs) for water/n-butanol pervaporation application, which have never been investigated previously. The fillers were hydrophilic SiO2 nanoparticles. The synthesized PI was mixed with SiO2 nanoparticles in DMAc to make the casting solution, and a liquid film was formed over PET substrate using doctor blade. A dense MMM was fabricated at 80 °C and further treated via multi-stage curing (100–170 °C). The prepared membranes were characterized by FTIR, TGA, FE-SEM, water contact angle, and solvent swelling. The trends of pure solvent swelling effects agree well with the water contact angle results. Moreover, the pervaporation efficiencies of alicyclic PI/SiO2 MMMs for 85 wt% n-butanol aqueous solution at 40 °C were investigated. The results showed that BCDA-3,4′-ODA/SiO2 MMMs had a larger permeation flux and higher separation factor than BCDA-1,3,3-APB/SiO2 MMMs. For both types of MMMs, the separation factor increased first and then decreased, with increasing SiO2 loading. Based on the PSI performance, the optimal SiO2 content was 0.5 wt% for BCDA-3,4′-ODA/SiO2 MMMs and 5 wt% for BCDA-1,3,3-APB/SiO2 MMMs. The overall separation efficiency of BCDA-3,4′-ODA-based membranes was 10–30-fold higher. Full article
(This article belongs to the Special Issue Thermodynamics and Kinetics of Membrane and Reactive Mass-Exchange Processes)
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