| Autor: |
Tian, M, Buchard, A, Wells, SA, Fang, Y, Torrente-Murciano, L, Nearchou, A, Dong, Z, White, TJ, Sartbaeva, A, Ting, VP |
| Přispěvatelé: |
Tian, M [0000-0001-6983-6146], Ting, VP [0000-0003-3049-0939], Apollo - University of Cambridge Repository |
| Rok vydání: |
2018 |
| Předmět: |
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| Popis: |
© 2018 Nanostructured sodium amide encapsulated in a porous silica gel matrix (“NaNH2-SG”) was investigated for CO2capture and storage by in-situ gravimetric gas sorption. Exposure of NaNH2-SG to CO2at 25 °C and 1 bar pressure resulted in ~3.6 wt% CO2uptake over eight sorption/desorption cycles. Over 90% of the CO2uptake was non-reversible due to reaction between CO2and NaNH2to form sodium carbamate, as confirmed by13C and23Na 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 CO2capture 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 CO2capture and long-term storage. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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