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Exploring steam stability of mesoporous alumina species for improved carbon dioxide sorbent design

Exploring steam stability of mesoporous alumina species for improved carbon dioxide sorbent design
Exploring steam stability of mesoporous alumina species for improved carbon dioxide sorbent design

Many different metrics exist to assess the efficacy of a carbon capture sorbent, though one of the pivotal characteristics is stability on regeneration, most notably steam stability, which applies to steam stripping regeneration, a technique proposed for capture of CO 2 from humid flue gas. In this study, the steam stability of two different mesoporous alumina species is compared, with an aim to tune the synthesis methodology and the local structure and crystallinity of the samples to create a stable regenerable sorbent. The roles of calcination temperature and aminopolymer impregnation on sorbent stability and structure are also investigated using a wide range of characterization techniques to specifically probe the influence of the alumina support. We show through this study that support choice, and support stability, can play an important role in sorbent design for carbon capture. We highlight that regular crystallinity (such as in γ-alumina) hinders the formation of pseudo-boehmite, allowing a material to retain its CO 2 uptake. Further, we show that the addition of aminopolymers (PEI) can facilitate phase changes, however aminopolymers help maintain the mesoporosity of the sample, a key metric for CO 2 uptake.

alumina, steam-stability, carbon dioxide capture, aminopolymer
0022-2461
1-13
Potter, Matthew E.
34dee7dc-2f62-4022-bb65-fc7b7fb526d2
Lee, Jason J.
cc99ae04-cef5-4aa6-b070-4f5e0a05940a
Darunte, Lalit A.
899d1f76-7f7c-45ca-908b-d0c6e5b07838
Jones, Christopher W.
c6369228-9079-4a76-96be-fa541a8ed693
Potter, Matthew E.
34dee7dc-2f62-4022-bb65-fc7b7fb526d2
Lee, Jason J.
cc99ae04-cef5-4aa6-b070-4f5e0a05940a
Darunte, Lalit A.
899d1f76-7f7c-45ca-908b-d0c6e5b07838
Jones, Christopher W.
c6369228-9079-4a76-96be-fa541a8ed693

Potter, Matthew E., Lee, Jason J., Darunte, Lalit A. and Jones, Christopher W. (2019) Exploring steam stability of mesoporous alumina species for improved carbon dioxide sorbent design. Journal of Materials Science, 1-13. (doi:10.1007/s10853-019-03418-7).

Record type: Article

Abstract

Many different metrics exist to assess the efficacy of a carbon capture sorbent, though one of the pivotal characteristics is stability on regeneration, most notably steam stability, which applies to steam stripping regeneration, a technique proposed for capture of CO 2 from humid flue gas. In this study, the steam stability of two different mesoporous alumina species is compared, with an aim to tune the synthesis methodology and the local structure and crystallinity of the samples to create a stable regenerable sorbent. The roles of calcination temperature and aminopolymer impregnation on sorbent stability and structure are also investigated using a wide range of characterization techniques to specifically probe the influence of the alumina support. We show through this study that support choice, and support stability, can play an important role in sorbent design for carbon capture. We highlight that regular crystallinity (such as in γ-alumina) hinders the formation of pseudo-boehmite, allowing a material to retain its CO 2 uptake. Further, we show that the addition of aminopolymers (PEI) can facilitate phase changes, however aminopolymers help maintain the mesoporosity of the sample, a key metric for CO 2 uptake.

Text
J-Por-Mater_Revision_CLEAN_MEP_Paper_22-01-2019 - Accepted Manuscript
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More information

Accepted/In Press date: 4 February 2019
e-pub ahead of print date: 11 February 2019
Keywords: alumina, steam-stability, carbon dioxide capture, aminopolymer

Identifiers

Local EPrints ID: 428930
URI: http://eprints.soton.ac.uk/id/eprint/428930
ISSN: 0022-2461
PURE UUID: 206ce6e8-880f-45a1-a520-c1b62803f6ca
ORCID for Matthew E. Potter: ORCID iD orcid.org/0000-0001-9849-3306

Catalogue record

Date deposited: 14 Mar 2019 17:30
Last modified: 07 Oct 2020 06:35

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Contributors

Author: Jason J. Lee
Author: Lalit A. Darunte
Author: Christopher W. Jones

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