Back to Search
Start Over
Valorization Strategies in CO 2 Capture: A New Life for Exhausted Silica-Polyethylenimine.
- Source :
- International Journal of Molecular Sciences; Oct2023, Vol. 24 Issue 19, p14415, 15p
- Publication Year :
- 2023
-
Abstract
- The search for alternative ways to give a second life to materials paved the way for detailed investigation into three silica-polyethylenimine (Si-PEI) materials for the purpose of CO<subscript>2</subscript> adsorption in carbon capture and storage. A solvent extraction procedure was investigated to recover degraded PEIs and silica, and concomitantly, pyrolysis was evaluated to obtain valuable chemicals such as alkylated pyrazines. An array of thermal (TGA, Py-GC-MS), mechanical (rheology), and spectroscopical (ATR-FTIR, <superscript>1</superscript>H-<superscript>13</superscript>C-NMR) methods were applied to PEIs extracted with methanol to determine the relevant physico-chemical features of these polymers when subjected to degradation after use in CO<subscript>2</subscript> capture. Proxies of degradation associated with the plausible formation of urea/carbamate moieties were revealed by Py-GC-MS, NMR, and ATR-FTIR. The yield of alkylpyrazines estimated by Py-GC-MS highlighted the potential of exhausted PEIs as possibly valuable materials in other applications. [ABSTRACT FROM AUTHOR]
- Subjects :
- CARBON sequestration
POLYETHYLENEIMINE
SOLVENT extraction
Subjects
Details
- Language :
- English
- ISSN :
- 16616596
- Volume :
- 24
- Issue :
- 19
- Database :
- Complementary Index
- Journal :
- International Journal of Molecular Sciences
- Publication Type :
- Academic Journal
- Accession number :
- 172988186
- Full Text :
- https://doi.org/10.3390/ijms241914415