Guanidine-functionalized basic binuclear poly(ionic liquid)s for low partial pressure CO2 fixation into cyclic carbonate
A bifunctional guanidine-functionalized basic binuclear poly(ionic liquid)s were successfully prepared ternary copolymerization of binuclear bromine ILs, guanidine functionalized binuclear ILs and DVB by free radical polymerization, which were applied for one-pot efficiently catalyzing the cycloaddi...
Gespeichert in:
Veröffentlicht in: | Separation and purification technology 2024-07, Vol.339, p.126682, Article 126682 |
---|---|
Hauptverfasser: | , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | A bifunctional guanidine-functionalized basic binuclear poly(ionic liquid)s were successfully prepared ternary copolymerization of binuclear bromine ILs, guanidine functionalized binuclear ILs and DVB by free radical polymerization, which were applied for one-pot efficiently catalyzing the cycloaddition of the simulated flue gas (15% CO2 + 85% N2) without any co-catalyst.
[Display omitted]
•Novel guanidine-functionalized basic binuclear poly(ionic liquid)s (GB-PILs) are successfully prepared.•GB-PILs provide the built abundant pores and the exposed bromine anions.•GB-PILs can efficiently catalyze the CO2 cycloaddition of the simulated flue gas without solvent and cocatalyst.•The mechanism of co-catalyzing the cycloaddition reaction of CO2 and epoxide with guanidine basic sites and binuclear ones in P-DBTMGH catalyst is explored.
The direct conversion of low partial pressure (10–15 %) from industrial waste gas into high value-added chemicals provides a favorable solution to global climate change. However, developing high-efficient catalysts for the conversion of low partial pressure CO2 under mild conditions is still a major challenge. Here, guanidine-functionalized basic binuclear poly(ionic liquid)s (P-DBTMGH) were prepared by free radical copolymerization. With the introduction of guanidine ionic liquids into the framework of GB-PILs, the alkalinity in the structure was improved, and thus enhancing CO2 surface adsorption and activation ability. Meanwhile, bromide containing binuclear sites help to increase the ion density of bromide and promote the occurrence of ring opening. Using epichlorohydrin as a probe substrate, P-DBTMGH could efficiently catalyze the cycloaddition reaction of the simulated flue gas (15 vol% CO2 + 85 vol% N2) without any co-catalyst or solvent, and chloropropene carbonate (CPC) with a selectivity and yield of 99 % and 96 % was obtained, which was better than or equivalent to the results reported previously. Moreover, the theoretical studies deeply understood the synergetic effect of guanidine basic sites and bromide containing binuclear sites on CO2 activation and ring-opening of epoxides, which provides a better choice for high-value utilization of low partial pressure CO2 from flue gas. |
---|---|
ISSN: | 1383-5866 1873-3794 |
DOI: | 10.1016/j.seppur.2024.126682 |