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Separations
Special Issues
Green Solvents and Advanced Materials for Gas Capture and Separation
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Green Solvents and Advanced Materials for Gas Capture and Separation

A special issue of Separations (ISSN 2297-8739). This special issue belongs to the section "Materials in Separation Science".

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 1227

Special Issue Editor

Dr. Moises Bastos-Neto

E-Mail Website
Guest Editor
Associate Professor, Grupo de Pesquisa em Separações por Adsorção (GPSA)—Department of Chemical Engineering, Universidade Federal do Ceará, Fortaleza 60455-760, Brazil
Interests: adsorption; CCSU; gas separation; gas cleaning; process modeling; hydrogen; biogas; PSA; TSA

Special Issue Information

Dear Colleagues,

The processes and technologies of gas capture and separation play important roles in the global economy and different industrial sectors. Due to the increasing energy demand and stronger environmental regulations, there is a constant search for improvement and optimization. Current challenges in the field include the development of new materials that may selectively retain a given gas component and process intensification via the optimization of operating conditions. Recent developments of molecular simulation tools, aided by experimental data obtained by carefully designed methods, are also reported as contributing to the understanding and further enhancement of separation and capture processes.

The goal of this Special Issue is to showcase how mainstream scientists in the fields of adsorption, extraction, membranes, separation processes and material engineering have been addressing strategies to enhance gas separation and capture efficiency sustainably via the use of different approaches and technologies.

Dr. Moises Bastos-Neto
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. Separations 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 2600 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

  • gas separation
  • gas capture
  • adsorption
  • absorption
  • membrane
  • solvents
  • sorbents

Published Papers (1 paper)

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Research

16 pages, 6007 KiB  
Article
Enhanced CO2 Capture by Sorption on Electrospun Poly (Methyl Methacrylate)
by Michele Ciulla, Valentino Canale, Rafal D. Wolicki, Serena Pilato, Pantaleone Bruni, Stefania Ferrari, Gabriella Siani, Antonella Fontana and Pietro Di Profio
Separations 2023, 10(9), 505; https://doi.org/10.3390/separations10090505 - 14 Sep 2023
Cited by 1 | Viewed by 1021
Abstract
Poly(methyl methacrylate) (PMMA) is characterized by high CO2 capture yield under mild pressures and temperatures. A morphological modification of powdery amorphous PMMA (pPMMA) is carried out by electrospinning to increase the surface/volume ratio of the resulting electrospun PMMAs (ePMMAs). This modification improves [...] Read more.
Poly(methyl methacrylate) (PMMA) is characterized by high CO2 capture yield under mild pressures and temperatures. A morphological modification of powdery amorphous PMMA (pPMMA) is carried out by electrospinning to increase the surface/volume ratio of the resulting electrospun PMMAs (ePMMAs). This modification improves the kinetics and the capture yields. The rate constants observed for ePMMAs are two to three times higher than those for pPMMA, reaching 90% saturation values within 5–7 s. The amount of sorbed CO2 is up to eleven times higher for ePMMAs at 1 °C, and the highest difference in captured CO2 amount is observed at the lowest tested pressure of 1 MPa. The operating life of the ePMMAs shows a 5% yield loss after ten consecutive runs, indicating good durability. Spent electrospun PMMAs after several cycles of CO2 sorption-desorption can be regenerated by melting and again electrospinning the molten mass, resulting in a CO2 capture performance that is undistinguishable from that observed with fresh ePMMA. Scanning electron and atomic force microscopies show a reduction in surface roughness after gas exposure, possibly due to the plasticization effect of CO2. This study shows the potential of electrospun PMMAs as solid sorbents for carbon capture from natural gas or pre-combustion and oxyfuel combustion processes. Full article
(This article belongs to the Special Issue Green Solvents and Advanced Materials for Gas Capture and Separation)
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