Direct air capture (DAC) of CO2 using polyethylenimine (PEI) "snow": a scalable strategy. Issue 52 (28th May 2020)

• Record Type: Journal Article
• Authors: Xu, Xingguang; Myers, Matthew B.; Versteeg, Friso G.; Pejcic, Bobby; Heath, Charles; Wood, Colin D.
• Is Part Of: Chemical communications. Volume 56:Issue 52(2020)
• Page Start: 7151
• Page End: 7154
• Publication Date: 2020-05-28
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/d0cc02572k
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : We report the rapid and scalable preparation of PEI snow that can remove CO2 from air under industrial conditions. Abstract : We have developed a cross-linked polyethyleneimine non-porous material (PEI "snow") for direct air capture (DAC) of CO2 . This new hydrogel is green, inexpensive, readily scalable and can be fabricated through simple crosslinking of PEI with triglycidyl trimethylolpropane ether (TTE) in 10 minutes. It demonstrates outstanding DAC performance (overall CO2 uptake efficiency of approximately 50 mg g −1 of sorbent) at lab scale (sorbent weight roughly 60 g, air flow rate 2000 ml min −1 ) and the CO2 can be desorbed using low-grade waste steam.