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Interplay between oxygen doping and ultra-microporosity improves the CO2/N2 separation performance of carbons derived from aromatic polycarboxylates

Saeid Khodabakhshi, Marco Taddei Orcid Logo, Jennifer Rudd Orcid Logo, Matthew McPherson Orcid Logo, Yubiao Niu, Richard Palmer Orcid Logo, Andrew Barron, Enrico Andreoli Orcid Logo

Carbon, Volume: 173, Pages: 989 - 1002

Swansea University Authors: Saeid Khodabakhshi, Marco Taddei Orcid Logo, Jennifer Rudd Orcid Logo, Matthew McPherson Orcid Logo, Yubiao Niu, Richard Palmer Orcid Logo, Andrew Barron, Enrico Andreoli Orcid Logo

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DOI (Published version): 10.1016/j.carbon.2020.11.080

Abstract

Microporous carbons were prepared starting from a series of benzene polycarboxylic acids following two strategies: (i) activation- and template-free pyrolysis and (ii) ion-exchange pyrolysis. The proposed synthetic strategies are facile approaches to produce highly microporous carbons that avoid the...

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Published in: Carbon
ISSN: 0008-6223
Published: Elsevier BV 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa55810
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The proposed synthetic strategies are facile approaches to produce highly microporous carbons that avoid the use of large amounts of corrosive and expensive chemical activators or templates. By varying the number of carboxylic acid groups, the charge balancing species and the degree of deprotonation of the precursors, microporous carbons with diverse morphologies, textural properties and oxygen contents were obtained and their CO2 and N2 sorption properties were assessed. The abundant micropores made the materials suitable for CO2 adsorption at low pressure and ambient temperature, achieving CO2 uptake as high as 4.4 mmol/g at 25 &#xB0;C and 1 bar, competitive with those reported for porous carbons produced using large excess of alkali metal based activating agents. It was found that high performance, in terms of CO2 uptake and CO2/N2 selectivity, was linked to the simultaneous presence of large ultra-micropore volume and high oxygen content in the sorbents. 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spelling 2021-02-15T15:53:41.8588880 v2 55810 2020-12-03 Interplay between oxygen doping and ultra-microporosity improves the CO2/N2 separation performance of carbons derived from aromatic polycarboxylates 547fd5929a2fd30733277eca799fbf9b Saeid Khodabakhshi Saeid Khodabakhshi true false 5cffd1038508554d8596dee8b4e51052 0000-0003-2805-6375 Marco Taddei Marco Taddei true false c2e4cf0f048a86b5ca2f331e6c566aff 0000-0002-5209-477X Jennifer Rudd Jennifer Rudd true false 69886ed1df27345672e1a52ddee565fe 0000-0002-7529-5355 Matthew McPherson Matthew McPherson true false c403a40f2acf2dc32e37b4555d19b4c0 Yubiao Niu Yubiao Niu true false 6ae369618efc7424d9774377536ea519 0000-0001-8728-8083 Richard Palmer Richard Palmer true false 92e452f20936d688d36f91c78574241d Andrew Barron Andrew Barron true false cbd843daab780bb55698a3daccd74df8 0000-0002-1207-2314 Enrico Andreoli Enrico Andreoli true false 2020-12-03 EAAS Microporous carbons were prepared starting from a series of benzene polycarboxylic acids following two strategies: (i) activation- and template-free pyrolysis and (ii) ion-exchange pyrolysis. The proposed synthetic strategies are facile approaches to produce highly microporous carbons that avoid the use of large amounts of corrosive and expensive chemical activators or templates. By varying the number of carboxylic acid groups, the charge balancing species and the degree of deprotonation of the precursors, microporous carbons with diverse morphologies, textural properties and oxygen contents were obtained and their CO2 and N2 sorption properties were assessed. The abundant micropores made the materials suitable for CO2 adsorption at low pressure and ambient temperature, achieving CO2 uptake as high as 4.4 mmol/g at 25 °C and 1 bar, competitive with those reported for porous carbons produced using large excess of alkali metal based activating agents. It was found that high performance, in terms of CO2 uptake and CO2/N2 selectivity, was linked to the simultaneous presence of large ultra-micropore volume and high oxygen content in the sorbents. This suggests that the interplay of ultra-microporosity and oxygen doping matters more than the two features taken singularly in determining the CO2/N2 separation properties of porous carbons at low pressure. Journal Article Carbon 173 989 1002 Elsevier BV 0008-6223 Porous carbons, carbon capture, ultra-microporosity, oxygen doping 1 3 2021 2021-03-01 10.1016/j.carbon.2020.11.080 COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University 2021-02-15T15:53:41.8588880 2020-12-03T09:45:39.8880235 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Saeid Khodabakhshi 1 Marco Taddei 0000-0003-2805-6375 2 Jennifer Rudd 0000-0002-5209-477X 3 Matthew McPherson 0000-0002-7529-5355 4 Yubiao Niu 5 Richard Palmer 0000-0001-8728-8083 6 Andrew Barron 7 Enrico Andreoli 0000-0002-1207-2314 8 55810__18799__38192a34c7ad4fcbb42838c87eacb698.pdf 55810.pdf 2020-12-03T09:47:52.4494686 Output 3560614 application/pdf Accepted Manuscript true 2021-12-01T00:00:00.0000000 ©2020 All rights reserved. All article content, except where otherwise noted, is licensed under a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND) true eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title Interplay between oxygen doping and ultra-microporosity improves the CO2/N2 separation performance of carbons derived from aromatic polycarboxylates
spellingShingle Interplay between oxygen doping and ultra-microporosity improves the CO2/N2 separation performance of carbons derived from aromatic polycarboxylates
Saeid Khodabakhshi
Marco Taddei
Jennifer Rudd
Matthew McPherson
Yubiao Niu
Richard Palmer
Andrew Barron
Enrico Andreoli
title_short Interplay between oxygen doping and ultra-microporosity improves the CO2/N2 separation performance of carbons derived from aromatic polycarboxylates
title_full Interplay between oxygen doping and ultra-microporosity improves the CO2/N2 separation performance of carbons derived from aromatic polycarboxylates
title_fullStr Interplay between oxygen doping and ultra-microporosity improves the CO2/N2 separation performance of carbons derived from aromatic polycarboxylates
title_full_unstemmed Interplay between oxygen doping and ultra-microporosity improves the CO2/N2 separation performance of carbons derived from aromatic polycarboxylates
title_sort Interplay between oxygen doping and ultra-microporosity improves the CO2/N2 separation performance of carbons derived from aromatic polycarboxylates
author_id_str_mv 547fd5929a2fd30733277eca799fbf9b
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author_id_fullname_str_mv 547fd5929a2fd30733277eca799fbf9b_***_Saeid Khodabakhshi
5cffd1038508554d8596dee8b4e51052_***_Marco Taddei
c2e4cf0f048a86b5ca2f331e6c566aff_***_Jennifer Rudd
69886ed1df27345672e1a52ddee565fe_***_Matthew McPherson
c403a40f2acf2dc32e37b4555d19b4c0_***_Yubiao Niu
6ae369618efc7424d9774377536ea519_***_Richard Palmer
92e452f20936d688d36f91c78574241d_***_Andrew Barron
cbd843daab780bb55698a3daccd74df8_***_Enrico Andreoli
author Saeid Khodabakhshi
Marco Taddei
Jennifer Rudd
Matthew McPherson
Yubiao Niu
Richard Palmer
Andrew Barron
Enrico Andreoli
author2 Saeid Khodabakhshi
Marco Taddei
Jennifer Rudd
Matthew McPherson
Yubiao Niu
Richard Palmer
Andrew Barron
Enrico Andreoli
format Journal article
container_title Carbon
container_volume 173
container_start_page 989
publishDate 2021
institution Swansea University
issn 0008-6223
doi_str_mv 10.1016/j.carbon.2020.11.080
publisher Elsevier BV
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering
document_store_str 1
active_str 0
description Microporous carbons were prepared starting from a series of benzene polycarboxylic acids following two strategies: (i) activation- and template-free pyrolysis and (ii) ion-exchange pyrolysis. The proposed synthetic strategies are facile approaches to produce highly microporous carbons that avoid the use of large amounts of corrosive and expensive chemical activators or templates. By varying the number of carboxylic acid groups, the charge balancing species and the degree of deprotonation of the precursors, microporous carbons with diverse morphologies, textural properties and oxygen contents were obtained and their CO2 and N2 sorption properties were assessed. The abundant micropores made the materials suitable for CO2 adsorption at low pressure and ambient temperature, achieving CO2 uptake as high as 4.4 mmol/g at 25 °C and 1 bar, competitive with those reported for porous carbons produced using large excess of alkali metal based activating agents. It was found that high performance, in terms of CO2 uptake and CO2/N2 selectivity, was linked to the simultaneous presence of large ultra-micropore volume and high oxygen content in the sorbents. This suggests that the interplay of ultra-microporosity and oxygen doping matters more than the two features taken singularly in determining the CO2/N2 separation properties of porous carbons at low pressure.
published_date 2021-03-01T07:58:30Z
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