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Valorization Strategies in CO 2 Capture: A New Life for Exhausted Silica-Polyethylenimine.

Authors :
Coralli, Irene
Giuri, Demetra
Spada, Lorenzo
Ortolani, Jacopo
Mazzocchetti, Laura
Tomasini, Claudia
Stevens, Lee A.
Snape, Colin E.
Fabbri, Daniele
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]

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