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Journals
Processes
Special Issues
Advanced Separation and Purification Processes
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Advanced Separation and Purification Processes

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Separation Processes".

Deadline for manuscript submissions: 30 September 2025 | Viewed by 2651

Special Issue Editors

Dr. Cláudio da Silva Rocha

E-Mail Website
Guest Editor
LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
Interests: CO2 capture; steam reforming; membrane; catalysis; methanation
Special Issues, Collections and Topics in MDPI journals
Dr. Miguel Angel Soria

E-Mail Website
Guest Editor
LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200–465 Porto, Portugal
Interests: hydrogen production through reforming and/or water-gas shift reaction; sorption-enhanced reaction process; membrane reactor; heterogeneous catalysis; synthesis and characterization of hydrotalcite CO2 adsorbents; wastewater valorization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are pleased to invite you to contribute to a Special Issue of the journal Processes (MDPI) titled “Advanced Separation and Purification Processes”.

The field of separation and purification is essential in several industrial and environmental applications, ranging from chemical manufacturing to water treatment. As advancements in technology and methodology continue to improve, staying abreast of the latest developments and innovations is crucial. This Special Issue aims to gather high-quality research papers, reviews, and case studies that focus on the most recent advancements in separation and purification processes.

We welcome submissions on a variety of topics including, but not limited to, the following:

  • Innovative separation techniques and equipment;
  • Advances in membrane technology;
  • Adsorption and desorption processes;
  • Distillation and extraction methods;
  • Chromatography and ion exchange;
  • Biotechnological separation processes;
  • Applications in pharmaceuticals, petrochemicals, and environmental engineering;
  • Computational modeling and simulation of separation processes.

This Special Issue aims to provide a comprehensive overview of current research trends and future directions in the field. We encourage researchers and practitioners from academia and industry to share their findings and insights, contributing to a collective advancement in knowledge and application.

Dr. Cláudio da Silva Rocha
Dr. Miguel Angel Soria
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 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. Processes 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 2400 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

  • separation techniques
  • membrane technology
  • adsorption processes
  • distillation methods
  • biotechnological separation

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  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

19 pages, 5170 KiB  
Article
Appraisal of Fluoride Removal Capability of Al-Fe Oxide-Infused Diatomaceous Earth in a Continuous-Flow Fixed-Bed Column
by Anthony A. Izuagie and Wilson M. Gitari
Processes 2025, 13(2), 501; https://doi.org/10.3390/pr13020501 - 11 Feb 2025
Viewed by 556
Abstract
This study was carried out to appraise the groundwater fluoride removal effectiveness of Al-Fe oxide-infused diatomaceous earth (DE) in a continuous-flow fixed-bed column. The adsorbent was optimally synthesized and then characterized. A glass column designed for the experiment was packed with the test [...] Read more.
This study was carried out to appraise the groundwater fluoride removal effectiveness of Al-Fe oxide-infused diatomaceous earth (DE) in a continuous-flow fixed-bed column. The adsorbent was optimally synthesized and then characterized. A glass column designed for the experiment was packed with the test adsorbent at specific doses. The effects of flow rate, influent fluoride concentration and bed height (adsorbent dose) on fluoride removal were evaluated by fixing the value of a parameter while varying the others. The breakthrough volume was the volume of treated water obtained until the concentration of fluoride in the treated water reached 1.5 mg/L, which is the World Health Organization’s maximum limit of fluoride in drinking water. The maximum breakthrough volume obtained in this study was 118.2 mL under the optimum conditions of influent F− concentration = 5 mg/L, 1 g of adsorbent with an initial bed height = 7.5 cm and a flow rate = 1.97 mL/min. Channeling and the presence of PO43− as a co-existing anion were limiting factors for the attainment of the breakthrough volume for groundwater defluoridation. Further work is encouraged to investigate a suitable binder that can hold the adsorbent particles firmly together, is not water-soluble, but remains water-permeable when dry. The resulting solid mass could then be pulverized into granules whose weight and rigidity would make them less susceptible to the channeling effect in the column. Full article
(This article belongs to the Special Issue Advanced Separation and Purification Processes)
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25 pages, 5781 KiB  
Article
Preparation and Characterization of Materials for Low- to Intermediate-Temperature CO2 Adsorption
by Anabela Figueiredo, Miguel Angel Soria, Luís Miguel Madeira and Cláudio Rocha
Processes 2024, 12(11), 2403; https://doi.org/10.3390/pr12112403 - 31 Oct 2024
Viewed by 1080
Abstract
Global carbon dioxide emissions are rising and the use of fossil fuels in several sectors are the leading causes. As global population and economies continue to grow significantly, the most practical method of lowering such emissions is to capture CO2. Although [...] Read more.
Global carbon dioxide emissions are rising and the use of fossil fuels in several sectors are the leading causes. As global population and economies continue to grow significantly, the most practical method of lowering such emissions is to capture CO2. Although other technologies are more developed, adsorption is very promising and has attracted much attention. To ensure this technology’s success, it is essential to have suitable CO2 adsorbent materials. In this work, several new hydrotalcites (HTs) with different initial concentrations of ion precursors were prepared for the first time by the co-precipitation method—it was possible to verify that the ion concentrations influence the characteristics of the materials. The prepared HTs were characterized by thermogravimetric analysis (TG), X-Ray diffraction (XRD), surface area measurements and temperature-programmed desorption of CO2 (TPD-CO2) to relate their CO2 capture capacity to their physicochemical properties; the CO2 adsorption equilibrium isotherms were determined at 35 and 300 °C for the prepared samples, as well as for some commercial materials: magnesium oxide, calcium oxide, aluminium oxide and Zeolite 13X. After determining which materials present the best CO2 adsorption capacity, these were submitted to adsorption-desorption cycles to study their stability. The main objective of the work was to prepare and study different CO2 adsorbents for processes that are carried out at low and intermediate temperatures. From the experimental results, it was possible to conclude that the Zeolite 13X showed the best capacity at 35 °C, 3.38 mmol·g−1 (@ pCO2 = 1 bar), and a prepared calcined HT (c-HT2) was the best at 300 °C, 0.97 mmol·g−1 (@ pCO2 = 1 bar). Moreover, it seems there is an optimum initial concentration of the ions’ solutions for the tested HTs, which depends on the final application—c-HT1 showed a better capacity at 35 °C and c-HT2 at 300 °C. From the adsorption-desorption cycles—performed at 35 and 300 °C with the best materials using a magnetic suspension microbalance at 1 bar of CO2 partial pressure —, a working cyclic capacity of 2.69 mmol∙g−1 was achieved by the Zeolite at 35 °C; in turn, c-HT2 showed a working cyclic capacity of 0.79 mmol∙g−1 at 300 °C. Full article
(This article belongs to the Special Issue Advanced Separation and Purification Processes)
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