CO2 Capture and Low-Carbon Hydrogen Production Processes

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

Deadline for manuscript submissions: 20 April 2026 | Viewed by 748

Special Issue Editors


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Guest Editor
Centre for Engineering Innovation and Research, School of Engineering, Computing and Mathematical Sciences, University of Wolverhampton, Wolverhampton WV1 1LY, UK
Interests: CO2 capture and utilisation; low-carbon hydrogen production; carbon capture and storage (CCS); renewable and sustainable energy systems; diesel generator decarbonisation; gas absorption and separation technologies; process modelling and optimisation; biofuels and clean fuels; process integration and intensification; energy transition and net-zero

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Guest Editor
Department of Chemical Engineering, Brunel University London, Uxbridge UB8 3PH, UK
Interests: separation processes; process synthesis and design; carbon capture and utilisation
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Chemical Engineering, School of Engineering, Lancaster University, Lancaster LA1 4YW, UK
Interests: computer-aided materials and process design; multiscale simulation (molecular to process scale); physics-based, data-driven and hybrid modelling approaches; sustainable formulated product development

Special Issue Information

Dear Colleagues,

This Special Issue aims to gather high-quality research and review contributions that address novel advancements in CO2 capture and the low-carbon production of hydrogen. Submissions may explore integrated strategies that mitigate carbon emissions while enabling sustainable hydrogen generation. Topics include, but are not limited to, the following:

  • Emerging CO2 capture technologies, including direct air capture (DAC), post‑combustion and pre‑combustion capture, oxy‑fuel and chemical‑looping combustion, adsorption, absorption, membrane systems, and hybrid methods.
  • Innovative low-carbon hydrogen production processes, such as green hydrogen via electrolysis (PEM, AEL, SOEC, etc.), sorption‑enhanced water‑gas shift (SEWGS), direct air capture‑electrolysis integration, and chemical‑looping reforming.
  • Coupled and integrated process designs that co-produce hydrogen while capturing CO2, such as sector-coupled DAC + hydrogen systems and catalytic hybrid processes.
  • Modelling, techno-economic evaluation, lifecycle assessment, process intensification, and scale-up studies for CO2 capture and hydrogen systems.
  • Novel materials, catalysts, reactors, and membranes that enhance efficiency, selectivity, durability, and cost‑effectiveness in CO2 capture and low-carbon hydrogen production.

For this Special Issue, we welcome research articles, comprehensive reviews, communications, and case studies that provide innovative, practical, and sustainable solutions toward a decarbonised hydrogen economy.

Dr. Shervan Babamohammadi
Dr. Salman Masoudi Soltani
Dr. Reza Andalibi
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 250 words) can be sent to the Editorial Office for assessment.

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

  • CO2 capture technologies
  • low‑carbon hydrogen production
  • green hydrogen (electrolysis: PEM, AEL, SOEC)
  • chemical‑looping combustion/reforming
  • sorption‑enhanced water‑gas shift (SEWGS)
  • direct air capture (DAC) integration
  • hybrid CO2 capture and hydrogen systems
  • techno‑economic analysis & lifecycle assessment
  • advanced membranes and catalysts
  • process modelling and intensification

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Published Papers (1 paper)

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Research

27 pages, 4684 KB  
Article
Intensified CO2 Absorption Process Using a Green Solvent: Rate-Based Modelling, Sensitivity Analysis, and Scale-Up
by Morteza Afkhamipour, Mohammad Shamsi, Seyedsaman Mousavian and Tohid N. Borhani
Processes 2025, 13(12), 3774; https://doi.org/10.3390/pr13123774 - 22 Nov 2025
Viewed by 306
Abstract
Ionic liquids (ILs) are recognized as environmentally friendly solvents due to their high CO2 absorption capacity, ease of recovery, and chemical stability, making them a promising alternative to conventional solvents for CO2 capture. In this study, a rate-based mathematical model was [...] Read more.
Ionic liquids (ILs) are recognized as environmentally friendly solvents due to their high CO2 absorption capacity, ease of recovery, and chemical stability, making them a promising alternative to conventional solvents for CO2 capture. In this study, a rate-based mathematical model was developed for a rotating packed bed (RPB) absorber employing 1-n-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]) as the solvent. The model incorporates mass, energy, and momentum balances, coupled with a thermodynamic model whose parameters were determined using experimental data. The rate-based model was validated against experimental results obtained from the RPB absorber. To enhance predictive accuracy, a sensitivity analysis of various mass transfer correlations was conducted, and simulations were performed based on the outcomes of this analysis. The model provided detailed radial profiles of pressure, gas and liquid flow rates, CO2 concentration, temperature, volumetric mass transfer coefficients, and both gas- and liquid-phase resistances. The results indicated that the CO2 capture efficiency and mass transfer coefficients in both phases increased with rotational speed along the bed’s radial direction. Furthermore, the RPB was designed for a flue gas stream from a fired heater in a petrochemical unit containing 10.74 mol % CO2. The optimal liquid-to-gas ratio at a large scale was found to be 0.3 kg/kg, achieving a CO2 removal efficiency of 98%. Under these conditions, the required motor power at an outer radius of 1.55 m was approximately 24.6 kW. Furthermore, comparison with a conventional packed bed showed that the liquid-phase volumetric mass transfer coefficient in the RPB was significantly higher, confirming its superior mass transfer performance. Full article
(This article belongs to the Special Issue CO2 Capture and Low-Carbon Hydrogen Production Processes)
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