Mechanism of CO2 capture in nanostructured sodium amide encapsulated in porous silica
Nanostructured sodium amide encapsulated in a porous silica gel matrix (“NaNH2-SG”) was investigated for CO2 capture and storage by in-situ gravimetric gas sorption. Exposure of NaNH2-SG to CO2 at 25 °C and 1 bar pressure resulted in ~3.6 wt% CO2 uptake over eight sorption/desorption cycles. Over 90...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/142327 |
| _version_ | 1826128044316688384 |
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| author | Tian, Mi Buchard, Antoine Wells, Stephen A. Fang, Yanan Torrente-Murciano, Laura Nearchou, Antony Dong, Zhili White, Timothy John Sartbaeva, Asel Ting, Valeska P. |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Tian, Mi Buchard, Antoine Wells, Stephen A. Fang, Yanan Torrente-Murciano, Laura Nearchou, Antony Dong, Zhili White, Timothy John Sartbaeva, Asel Ting, Valeska P. |
| author_sort | Tian, Mi |
| collection | NTU |
| description | Nanostructured sodium amide encapsulated in a porous silica gel matrix (“NaNH2-SG”) was investigated for CO2 capture and storage by in-situ gravimetric gas sorption. Exposure of NaNH2-SG to CO2 at 25 °C and 1 bar pressure resulted in ~3.6 wt% CO2 uptake over eight sorption/desorption cycles. Over 90% of the CO2 uptake was non-reversible due to reaction between CO2 and NaNH2 to form sodium carbamate, as confirmed by 13C and 23Na solid-state NMR. Electronic structure calculations suggest a two-stage reaction process involving initial formation and subsequent rearrangement of the carbamate product. This research confirms the feasibility of sequential reactions of nanoparticles in a porous substrate (Na-SG to NaNH2-SG to Na-carbamate-SG), and of CO2 capture by NaNH2-SG nanoparticles stabilised by encapsulation within the porous substrate. This encapsulation method could allow further hygroscopic or reactive starting reagents or compounds to be explored for CO2 capture and long-term storage. |
| first_indexed | 2024-10-01T07:18:26Z |
| format | Journal Article |
| id | ntu-10356/142327 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:18:26Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1423272020-06-19T04:21:31Z Mechanism of CO2 capture in nanostructured sodium amide encapsulated in porous silica Tian, Mi Buchard, Antoine Wells, Stephen A. Fang, Yanan Torrente-Murciano, Laura Nearchou, Antony Dong, Zhili White, Timothy John Sartbaeva, Asel Ting, Valeska P. School of Materials Science and Engineering Engineering::Materials Carbon Capture Porous Silica Nanostructured sodium amide encapsulated in a porous silica gel matrix (“NaNH2-SG”) was investigated for CO2 capture and storage by in-situ gravimetric gas sorption. Exposure of NaNH2-SG to CO2 at 25 °C and 1 bar pressure resulted in ~3.6 wt% CO2 uptake over eight sorption/desorption cycles. Over 90% of the CO2 uptake was non-reversible due to reaction between CO2 and NaNH2 to form sodium carbamate, as confirmed by 13C and 23Na solid-state NMR. Electronic structure calculations suggest a two-stage reaction process involving initial formation and subsequent rearrangement of the carbamate product. This research confirms the feasibility of sequential reactions of nanoparticles in a porous substrate (Na-SG to NaNH2-SG to Na-carbamate-SG), and of CO2 capture by NaNH2-SG nanoparticles stabilised by encapsulation within the porous substrate. This encapsulation method could allow further hygroscopic or reactive starting reagents or compounds to be explored for CO2 capture and long-term storage. 2020-06-19T04:21:30Z 2020-06-19T04:21:30Z 2018 Journal Article Tian, M., Buchard, A., Wells, S., Fang, Y., Torrente-Murciano, L., Nearchou, A., . . . Ting, V. (2018). Mechanism of CO2 capture in nanostructured sodium amide encapsulated in porous silica. Surface and Coatings Technology, 350, 227-233. doi:10.1016/j.surfcoat.2018.06.049 0257-8972 https://hdl.handle.net/10356/142327 10.1016/j.surfcoat.2018.06.049 2-s2.0-85049756634 350 227 233 en Surface and Coatings Technology © 2018 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Materials Carbon Capture Porous Silica Tian, Mi Buchard, Antoine Wells, Stephen A. Fang, Yanan Torrente-Murciano, Laura Nearchou, Antony Dong, Zhili White, Timothy John Sartbaeva, Asel Ting, Valeska P. Mechanism of CO2 capture in nanostructured sodium amide encapsulated in porous silica |
| title | Mechanism of CO2 capture in nanostructured sodium amide encapsulated in porous silica |
| title_full | Mechanism of CO2 capture in nanostructured sodium amide encapsulated in porous silica |
| title_fullStr | Mechanism of CO2 capture in nanostructured sodium amide encapsulated in porous silica |
| title_full_unstemmed | Mechanism of CO2 capture in nanostructured sodium amide encapsulated in porous silica |
| title_short | Mechanism of CO2 capture in nanostructured sodium amide encapsulated in porous silica |
| title_sort | mechanism of co2 capture in nanostructured sodium amide encapsulated in porous silica |
| topic | Engineering::Materials Carbon Capture Porous Silica |
| url | https://hdl.handle.net/10356/142327 |
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