High CO 2 absorption capacity by chemisorption at cations and anions in choline-based ionic liquids
© 2017 the Owner Societies. The effect of CO 2 absorption on the aromaticity and hydrogen bonding in ionic liquids is investigated. Five different ionic liquids with choline based cations and aprotic N-heterocyclic anions were synthesized. Purity and structures of the synthesized ionic liquids were...
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ftkazanuniv:oai:dspace.kpfu.ru:net/130028 2023-05-15T15:52:52+02:00 High CO 2 absorption capacity by chemisorption at cations and anions in choline-based ionic liquids Bhattacharyya S. Filippov A. Shah F. 2017 http://dspace.kpfu.ru/xmlui/handle/net/130028 unknown Physical Chemistry Chemical Physics 46 19 31216 http://dspace.kpfu.ru/xmlui/bitstream/net/130028/-1/SCOPUS14639076-2017-19-46-SID85036626114-a1.pdf 1463-9076 http://dspace.kpfu.ru/xmlui/handle/net/130028 SCOPUS14639076-2017-19-46-SID85036626114 Article 2017 ftkazanuniv 2022-01-01T09:44:22Z © 2017 the Owner Societies. The effect of CO 2 absorption on the aromaticity and hydrogen bonding in ionic liquids is investigated. Five different ionic liquids with choline based cations and aprotic N-heterocyclic anions were synthesized. Purity and structures of the synthesized ionic liquids were characterized by 1 H and 13 C NMR spectroscopy. CO 2 capture performance was studied at 20 °C and 40 °C under three different pressures (1, 3, 6 bar). The IL [N 1,1,6,2OH ][4-Triz] showed the highest CO 2 capture capacity (28.6 wt%, 1.57 mol of CO 2 per mol of the IL, 6.48 mol of CO 2 per kg of the ionic liquid) at 20 °C and 1 bar. The high CO 2 capture capacity of the [N 1,1,6,2OH ][4-Triz] IL is due to the formation of carbonic acid (-OCO 2 H) together with carbamate by participation of the -OH group of the [N 1,1,6,2OH ] + cation in the CO 2 capture process. The structure of the adduct formed by CO 2 reaction with the IL [N 1,1,6,2OH ][4-Triz] was probed by using IR, 13 C NMR and 1 H- 13 C HMBC NMR experiments utilizing 13 C labeled CO 2 gas. 1 H and 13 C PFG NMR studies were performed before and after CO 2 absorption to explore the effect of cation-anion structures on the microscopic ion dynamics in ILs. The ionic mobility was significantly increased after CO 2 reaction due to lowering of aromaticity in the case of ILs with aromatic N-heterocyclic anions. Article in Journal/Newspaper Carbonic acid Kazan Federal University Digital Repository |
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© 2017 the Owner Societies. The effect of CO 2 absorption on the aromaticity and hydrogen bonding in ionic liquids is investigated. Five different ionic liquids with choline based cations and aprotic N-heterocyclic anions were synthesized. Purity and structures of the synthesized ionic liquids were characterized by 1 H and 13 C NMR spectroscopy. CO 2 capture performance was studied at 20 °C and 40 °C under three different pressures (1, 3, 6 bar). The IL [N 1,1,6,2OH ][4-Triz] showed the highest CO 2 capture capacity (28.6 wt%, 1.57 mol of CO 2 per mol of the IL, 6.48 mol of CO 2 per kg of the ionic liquid) at 20 °C and 1 bar. The high CO 2 capture capacity of the [N 1,1,6,2OH ][4-Triz] IL is due to the formation of carbonic acid (-OCO 2 H) together with carbamate by participation of the -OH group of the [N 1,1,6,2OH ] + cation in the CO 2 capture process. The structure of the adduct formed by CO 2 reaction with the IL [N 1,1,6,2OH ][4-Triz] was probed by using IR, 13 C NMR and 1 H- 13 C HMBC NMR experiments utilizing 13 C labeled CO 2 gas. 1 H and 13 C PFG NMR studies were performed before and after CO 2 absorption to explore the effect of cation-anion structures on the microscopic ion dynamics in ILs. The ionic mobility was significantly increased after CO 2 reaction due to lowering of aromaticity in the case of ILs with aromatic N-heterocyclic anions. |
format |
Article in Journal/Newspaper |
author |
Bhattacharyya S. Filippov A. Shah F. |
spellingShingle |
Bhattacharyya S. Filippov A. Shah F. High CO 2 absorption capacity by chemisorption at cations and anions in choline-based ionic liquids |
author_facet |
Bhattacharyya S. Filippov A. Shah F. |
author_sort |
Bhattacharyya S. |
title |
High CO 2 absorption capacity by chemisorption at cations and anions in choline-based ionic liquids |
title_short |
High CO 2 absorption capacity by chemisorption at cations and anions in choline-based ionic liquids |
title_full |
High CO 2 absorption capacity by chemisorption at cations and anions in choline-based ionic liquids |
title_fullStr |
High CO 2 absorption capacity by chemisorption at cations and anions in choline-based ionic liquids |
title_full_unstemmed |
High CO 2 absorption capacity by chemisorption at cations and anions in choline-based ionic liquids |
title_sort |
high co 2 absorption capacity by chemisorption at cations and anions in choline-based ionic liquids |
publishDate |
2017 |
url |
http://dspace.kpfu.ru/xmlui/handle/net/130028 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
SCOPUS14639076-2017-19-46-SID85036626114 |
op_relation |
Physical Chemistry Chemical Physics 46 19 31216 http://dspace.kpfu.ru/xmlui/bitstream/net/130028/-1/SCOPUS14639076-2017-19-46-SID85036626114-a1.pdf 1463-9076 http://dspace.kpfu.ru/xmlui/handle/net/130028 |
_version_ |
1766387969274413056 |