CO2 absorption studies on mixed alkali orthosilicates containing rare-earth second-phase additives
© 2015 American Chemical Society. Lithium silicate containing eutectic orthosilicate mixtures developed by a solid-state route displayed excellent characteristics as carbon dioxide absorbents at elevated temperature, showing absorption capacity of 256 mg g-1. Incorporation of second-phase materials...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
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American Chemical Society
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/29586 |
| _version_ | 1848752844728958976 |
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| author | Subha, P. Nair, Balagopal Hareesh, P. Mohamed, A. Yamaguchi, T. Warrier, K. Hareesh, U. |
| author_facet | Subha, P. Nair, Balagopal Hareesh, P. Mohamed, A. Yamaguchi, T. Warrier, K. Hareesh, U. |
| author_sort | Subha, P. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2015 American Chemical Society. Lithium silicate containing eutectic orthosilicate mixtures developed by a solid-state route displayed excellent characteristics as carbon dioxide absorbents at elevated temperature, showing absorption capacity of 256 mg g-1. Incorporation of second-phase materials was investigated as a strategy to enhance the stability of the absorbent materials against agglomeration and sintering during powder processing and high-temperature cyclic absorption/desorption loading. Yttrium oxide, gadolinium oxide, and lanthanum phosphate were added as second phases to the absorbent. It was found that when the composites were rich in absorbents (10:1 and 20:1 absorbent/second phase), the absorption performance was hardly influenced by the type of the second-phase material present. Yttrium oxide or gadolinium oxide additions in large quantities were found to enhance the absorption capacity of the orthosilicate phase. The 2:1 sample containing yttrium oxide gave absorption capacity of 315 mg g-1 of orthosilicate absorbent present in the composite sample. On the basis of the structural and morphological studies, we believe that the nonreactive second-phase components formed a virtual shell against the segregation of absorbent phase, thereby helping to improve their absorption performance. Cyclic studies have supported the superior stability and performance of such composite absorbent materials. |
| first_indexed | 2025-11-14T08:15:05Z |
| format | Journal Article |
| id | curtin-20.500.11937-29586 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:15:05Z |
| publishDate | 2015 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-295862017-09-13T15:26:00Z CO2 absorption studies on mixed alkali orthosilicates containing rare-earth second-phase additives Subha, P. Nair, Balagopal Hareesh, P. Mohamed, A. Yamaguchi, T. Warrier, K. Hareesh, U. © 2015 American Chemical Society. Lithium silicate containing eutectic orthosilicate mixtures developed by a solid-state route displayed excellent characteristics as carbon dioxide absorbents at elevated temperature, showing absorption capacity of 256 mg g-1. Incorporation of second-phase materials was investigated as a strategy to enhance the stability of the absorbent materials against agglomeration and sintering during powder processing and high-temperature cyclic absorption/desorption loading. Yttrium oxide, gadolinium oxide, and lanthanum phosphate were added as second phases to the absorbent. It was found that when the composites were rich in absorbents (10:1 and 20:1 absorbent/second phase), the absorption performance was hardly influenced by the type of the second-phase material present. Yttrium oxide or gadolinium oxide additions in large quantities were found to enhance the absorption capacity of the orthosilicate phase. The 2:1 sample containing yttrium oxide gave absorption capacity of 315 mg g-1 of orthosilicate absorbent present in the composite sample. On the basis of the structural and morphological studies, we believe that the nonreactive second-phase components formed a virtual shell against the segregation of absorbent phase, thereby helping to improve their absorption performance. Cyclic studies have supported the superior stability and performance of such composite absorbent materials. 2015 Journal Article http://hdl.handle.net/20.500.11937/29586 10.1021/jp511908t American Chemical Society restricted |
| spellingShingle | Subha, P. Nair, Balagopal Hareesh, P. Mohamed, A. Yamaguchi, T. Warrier, K. Hareesh, U. CO2 absorption studies on mixed alkali orthosilicates containing rare-earth second-phase additives |
| title | CO2 absorption studies on mixed alkali orthosilicates containing rare-earth second-phase additives |
| title_full | CO2 absorption studies on mixed alkali orthosilicates containing rare-earth second-phase additives |
| title_fullStr | CO2 absorption studies on mixed alkali orthosilicates containing rare-earth second-phase additives |
| title_full_unstemmed | CO2 absorption studies on mixed alkali orthosilicates containing rare-earth second-phase additives |
| title_short | CO2 absorption studies on mixed alkali orthosilicates containing rare-earth second-phase additives |
| title_sort | co2 absorption studies on mixed alkali orthosilicates containing rare-earth second-phase additives |
| url | http://hdl.handle.net/20.500.11937/29586 |