Journal
CHEMSUSCHEM
Volume 12, Issue 13, Pages 3172-3177Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201900324
Keywords
CO2 reduction; homogeneous catalysis; hydrogenation; immobilization; methanol
Funding
- Loker Hydrocarbon Research Institute, University of Southern California Funding Source: Medline
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Amines were immobilized onto solid supports and employed for tandem CO2 capture and conversion to CH3OH using homogeneous hydrogenation catalysts. The hydrogenation proceeded through the formation of formamide intermediates. After hydrogenation, the immobilized amines were easily filtered and collected to be reused. The catalyst and methanol were recovered from the filtrate. Covalently-attached (to polymer support or silica) amine functionalities displayed the highest recycling potential with almost no leaching under the hydrogenation reaction conditions. Using polyethylenimine grafted onto a solid-silica support, the catalyst and amine were successfully recycled, and CO2 (either pure or from the air) was efficiently captured and converted to CH3OH over multiple cycles.
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