Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 58, Issue 50, Pages 22579-22586Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.9b04858
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Funding
- Forward Water Technologies
- GreenCentre Canada
- HATCH
- Utilities Kingston
- Natural Sciences and Engineering Research Council of Canada (NSERC) [STPGP 494487-16]
- Mitacs
- Canada Research Chairs Program
- Ontario Research Chairs Program
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CO2-responsive polymers with high nitrogen to carbon ratios were tested as potential forward osmosis draw solutes in a forward osmosis/ultrafiltration process. Aqueous solutions of these polymers have the potential to produce high osmotic pressures in the presence of CO2 (up to 67 bar) but exhibit dramatically lower osmotic pressures under air. Purifying the polymer by dialysis to remove lower molecular mass materials significantly reduces the osmotic pressure under air without greatly lowering the osmotic pressure under CO2.
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