학술논문
Valorization Strategies in CO 2 Capture: A New Life for Exhausted Silica-Polyethylenimine.
Document Type
Academic Journal
Author
Coralli I; Department of Chemistry 'Giacomo Ciamician', University of Bologna, Technopole of Rimini, Via Dario Campana 71, 47922 Rimini, Italy.; Giuri D; Department of Chemistry 'Giacomo Ciamician', University of Bologna, Technopole of Rimini, Via Dario Campana 71, 47922 Rimini, Italy.; Spada L; Department of Chemistry 'Giacomo Ciamician', University of Bologna, Technopole of Rimini, Via Dario Campana 71, 47922 Rimini, Italy.; Ortolani J; Department of Industrial Chemistry 'Toso Montanari', University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy.; Mazzocchetti L; Department of Industrial Chemistry 'Toso Montanari', University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy.; Tomasini C; Department of Chemistry 'Giacomo Ciamician', University of Bologna, Technopole of Rimini, Via Dario Campana 71, 47922 Rimini, Italy.; Stevens LA; Faculty of Engineering, University of Nottingham, The Energy Technologies Building, Nottingham NG7 2TU, UK.; Snape CE; Faculty of Engineering, University of Nottingham, The Energy Technologies Building, Nottingham NG7 2TU, UK.; Fabbri D; Department of Chemistry 'Giacomo Ciamician', University of Bologna, Technopole of Rimini, Via Dario Campana 71, 47922 Rimini, Italy.
Source
Publisher: MDPI Country of Publication: Switzerland NLM ID: 101092791 Publication Model: Electronic Cited Medium: Internet ISSN: 1422-0067 (Electronic) Linking ISSN: 14220067 NLM ISO Abbreviation: Int J Mol Sci Subsets: MEDLINE
Subject
Language
English
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 2 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, 1 H- 13 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 2 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.