Addition of Imidazolium‐Based Ionic Liquid to Improve Methanol Production in Polyamine‐Assisted CO2 Capture and Conversion Systems Using Pincer Catalysts

Ionic liquids have been studied as CO2 capture agents. However, they are rarely used in combined CO2 capture and conversion processes. Utilizing imidazolium‐based ionic liquids, the conversion of CO2 to methanol was greatly improved in polyamine assisted systems catalyzed by homogeneous pincer catal...

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Bibliographic Details
Published in:ChemSusChem 2024-09, Vol.17 (18), p.e202301789-n/a
Main Authors: Koch, Christopher J., Goeppert, Alain, Surya Prakash, G. K.
Format: Article
Language:English
Subjects:
Carbon dioxide
Carbon sequestration
Catalysts
CO2 capture and utilization
homogeneous pincer catalyst
Ionic liquids
Methanol
Polyamines
Reagents
renewable methanol
Ru-macho catalyst
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Summary:Ionic liquids have been studied as CO2 capture agents. However, they are rarely used in combined CO2 capture and conversion processes. Utilizing imidazolium‐based ionic liquids, the conversion of CO2 to methanol was greatly improved in polyamine assisted systems catalyzed by homogeneous pincer catalysts with Ru and Mn metal centers. Among the ionic liquids tested, [BMIM]OAc was found to perform the best under the given reaction conditions. Among the polyamine tested, pentaethylenehexamine (PEHA) led to the highest conversion rates. Ru‐Macho and Ru‐Macho‐BH were the most active catalysts. Direct air capture utilizing PEHA as the capture material was also demonstrated and produced an 86 % conversion of the captured CO2 to methanol in the presence of [BMIM]OAc. The use of ionic liquids has been studied for CO2 capture; however, ionic liquids have not been well studied for their use in integrated capture and conversion processes to methanol. This study showcases that imidazolinium‐based ionic liquids can be utilized to greatly improve methanol production utilizing polyamine‐assisted capture systems with pincer catalysts.
ISSN:1864-5631
1864-564X
DOI:10.1002/cssc.202301789