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Applied Sciences
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Advances in Carbon Dioxide Removal Technologies
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Advances in Carbon Dioxide Removal Technologies

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Environmental Sciences".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 14906

Special Issue Editor

Dr. Grazia Leonzio

E-Mail Website
Guest Editor
Department of Chemical Engineering, Process Systems Engineering, Imperial College London, London SW7 2AZ, UK
Interests: renewable energies; carbon dioxide; carbon dioxide removal; modelling of chemical processes; carbon supply chains; environmental analysis of chemical processes; methanol
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Recent estimates show that global carbon dioxide emissions were more than 33 gigatons in 2018, following which several international agreements were signed in order to reduce greenhouse gases in the atmosphere. However, in order to achieve these fixed objectives, the conventional mitigation actions, meaning the reduction of carbon dioxide emissions, might be not enough and the removal of carbon dioxide might be required.

Negative emission technologies based on carbon dioxide removal will play a crucial role in the coming years to achieve the defined environmental agreements and stabilize the carbon dioxide concentration between 350 and 440 ppmv.

This Special Issue, entitled Carbon Dioxide Removal Technologies in the Applied Sciences journal, addresses the important role of these new systems to reach the set environmental targets. The issue covers original reviews, experimental and modelling research, and case studies related to carbon dioxide removal technologies. All aspects related to new developments and challenges in this research area will be included.

Dr. Grazia Leonzio
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. Applied Sciences is an international peer-reviewed open access semimonthly 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

  • carbon dioxide removal
  • carbon dioxide emissions
  • modelling
  • experimental analysis
  • optimization
  • environmental analysis
  • techno-economic feasibility
  • future development
  • novel technologies

Published Papers (2 papers)

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Research

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25 pages, 3821 KiB  
Article
A Comparative Study of Different Sorbents in the Context of Direct Air Capture (DAC): Evaluation of Key Performance Indicators and Comparisons
by Grazia Leonzio, Paul S. Fennell and Nilay Shah
Appl. Sci. 2022, 12(5), 2618; https://doi.org/10.3390/app12052618 - 3 Mar 2022
Cited by 22 | Viewed by 8839
Abstract
Direct air capture can be based on an adsorption system, and the used sorbent (chemisorbents or physisorbents) influences process. In this work, two amine-functionalized sorbents, as chemisorbents, and three different metal organic frameworks, as physisorbents, are considered and compared in terms of some [...] Read more.
Direct air capture can be based on an adsorption system, and the used sorbent (chemisorbents or physisorbents) influences process. In this work, two amine-functionalized sorbents, as chemisorbents, and three different metal organic frameworks, as physisorbents, are considered and compared in terms of some key performance indicators. This was carried out by developing a mathematical model describing the adsorption and desorption stages. An independent analysis was carried out in order to verify data reported in the literature. Results show that the equilibrium loading is a critical parameter for adsorption capacity, energy consumption, and cost. The considered metal organic frameworks are characterized by a lower equilibrium loading (10−4 mol/kg) compared to chemisorbents (10−1 mol/kg). For this reason, physisorbents have higher overall energy consumptions and costs, while capturing a lower amount of carbon dioxide. A reasonable agreement is found on the basis of the operating conditions of the Climeworks company, modelling the use of the same amine cellulose-based sorbent. The same order of magnitude is found for total costs (751 USD/tonneCO2 for our analysis, compared to the value of 600 USD/tonneCO2 proposed by this company). Full article
(This article belongs to the Special Issue Advances in Carbon Dioxide Removal Technologies)
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Review

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41 pages, 4861 KiB  
Review
Analysis of Technologies for Carbon Dioxide Capture from the Air
by Grazia Leonzio, Paul S. Fennell and Nilay Shah
Appl. Sci. 2022, 12(16), 8321; https://doi.org/10.3390/app12168321 - 19 Aug 2022
Cited by 18 | Viewed by 5426
Abstract
The increase in CO2 concentration in the atmosphere has prompted the research community to find solutions for this environmental problem, which causes climate change and global warming. CO2 removal through the use of negative emissions technologies could lead to global emission [...] Read more.
The increase in CO2 concentration in the atmosphere has prompted the research community to find solutions for this environmental problem, which causes climate change and global warming. CO2 removal through the use of negative emissions technologies could lead to global emission levels becoming net negative towards the end of this century. Among these negative emissions technologies, direct air capture (DAC), in which CO2 is captured directly from the atmosphere, could play an important role. The captured CO2 can be removed in the long term and through its storage can be used for chemical processes, allowing closed carbon cycles in the short term. For DAC, different technologies have been suggested in the literature, and an overview of these is proposed in this work. Absorption and adsorption are the most studied and mature technologies, but others are also under investigation. An analysis of the main key performance indicators is also presented here and it is suggested that more efforts should be made to develop DAC at a large scale by reducing costs and improving efficiency. An additional discussion, addressing the social concern, is indicated as well. Full article
(This article belongs to the Special Issue Advances in Carbon Dioxide Removal Technologies)
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