Enhanced CO2 absorption kinetics in lithium silicate platelets synthesized by a sol–gel approach
Platelet-shaped lithium orthosilicate particles synthesized by a sol–gel approach employing the precursors lithium nitrate and colloidal silica displayed enhanced absorption kinetics for CO2 compared to the powders prepared by a solid-state reaction process involving Li2CO3 and silica. The sol–gel s...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
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R S C Publications
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/15225 |
| _version_ | 1848748836178100224 |
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| author | Subha, P. Nair, Balagopal Hareesh, P. Mohamed, A.P. Yamaguchi, T. Warrier, K.G.K. Hareesh, U.S. |
| author_facet | Subha, P. Nair, Balagopal Hareesh, P. Mohamed, A.P. Yamaguchi, T. Warrier, K.G.K. Hareesh, U.S. |
| author_sort | Subha, P. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Platelet-shaped lithium orthosilicate particles synthesized by a sol–gel approach employing the precursors lithium nitrate and colloidal silica displayed enhanced absorption kinetics for CO2 compared to the powders prepared by a solid-state reaction process involving Li2CO3 and silica. The sol–gel samples showed a CO2 absorption capacity of 350 mg g-1 at an absorption rate of 22.5 mg g-1 min-1, a value 70% higher than the rate of 13.2 mg g-1 min-1 measured with the solid-state samples under similar conditions. The higher sorption kinetics of CO2 by the sol–gel derived lithium orthosilicate could be attributed to the unique platelet morphology of the particles, which have a very small thickness. A porous carbon mesh coated with the sol–gel based particles exhibited CO2 absorption capacity of 150 mg g-1 at an absorption rate of 37.5 mg g-1 min-1. This supported absorbent also showed stable absorption and desorption performance for the 8 cycles examined in this study. The excellent absorption characteristics of the sol–gel prepared powders, more specifically the coated strips, provide a successful pathway for the commercialisation of these materials. |
| first_indexed | 2025-11-14T07:11:22Z |
| format | Journal Article |
| id | curtin-20.500.11937-15225 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:11:22Z |
| publishDate | 2014 |
| publisher | R S C Publications |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-152252017-09-13T13:40:18Z Enhanced CO2 absorption kinetics in lithium silicate platelets synthesized by a sol–gel approach Subha, P. Nair, Balagopal Hareesh, P. Mohamed, A.P. Yamaguchi, T. Warrier, K.G.K. Hareesh, U.S. Platelet-shaped lithium orthosilicate particles synthesized by a sol–gel approach employing the precursors lithium nitrate and colloidal silica displayed enhanced absorption kinetics for CO2 compared to the powders prepared by a solid-state reaction process involving Li2CO3 and silica. The sol–gel samples showed a CO2 absorption capacity of 350 mg g-1 at an absorption rate of 22.5 mg g-1 min-1, a value 70% higher than the rate of 13.2 mg g-1 min-1 measured with the solid-state samples under similar conditions. The higher sorption kinetics of CO2 by the sol–gel derived lithium orthosilicate could be attributed to the unique platelet morphology of the particles, which have a very small thickness. A porous carbon mesh coated with the sol–gel based particles exhibited CO2 absorption capacity of 150 mg g-1 at an absorption rate of 37.5 mg g-1 min-1. This supported absorbent also showed stable absorption and desorption performance for the 8 cycles examined in this study. The excellent absorption characteristics of the sol–gel prepared powders, more specifically the coated strips, provide a successful pathway for the commercialisation of these materials. 2014 Journal Article http://hdl.handle.net/20.500.11937/15225 10.1039/c4ta01976h R S C Publications fulltext |
| spellingShingle | Subha, P. Nair, Balagopal Hareesh, P. Mohamed, A.P. Yamaguchi, T. Warrier, K.G.K. Hareesh, U.S. Enhanced CO2 absorption kinetics in lithium silicate platelets synthesized by a sol–gel approach |
| title | Enhanced CO2 absorption kinetics in lithium silicate platelets synthesized by a sol–gel approach |
| title_full | Enhanced CO2 absorption kinetics in lithium silicate platelets synthesized by a sol–gel approach |
| title_fullStr | Enhanced CO2 absorption kinetics in lithium silicate platelets synthesized by a sol–gel approach |
| title_full_unstemmed | Enhanced CO2 absorption kinetics in lithium silicate platelets synthesized by a sol–gel approach |
| title_short | Enhanced CO2 absorption kinetics in lithium silicate platelets synthesized by a sol–gel approach |
| title_sort | enhanced co2 absorption kinetics in lithium silicate platelets synthesized by a sol–gel approach |
| url | http://hdl.handle.net/20.500.11937/15225 |