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- Title
Solvent Impregnated Polymers Loaded with Liquid‐Like Nanoparticle Organic Hybrid Materials for Enhanced Kinetics of Direct Air Capture and Point Source CO<sub>2</sub> Capture.
- Authors
Rim, Guanhe; Feric, Tony G.; Moore, Thomas; Park, Ah‐Hyung Alissa
- Abstract
Hybrid CO2 capture materials, solvent impregnated polymers (SIPs), are developed based on a simple and scalable encapsulation technique to enhance CO2 capture kinetics of water‐lean solvents with high viscosity. Liquid‐like nanoparticle organic hybrid materials functionalized with polyethylenimine (NOHM‐I‐PEI) are incorporated into a shell material and UV‐cured to produce gas‐permeable solid sorbents with uniform NOHMs loading (NPEI‐SIPs). The CO2 capture kinetics of NPEI‐SIPs show a remarkable 50‐fold increase compared to that of neat NOHM‐I‐PEI due to a large increase in the NOHMs‐CO2 interfacial surface area provided by the SIP design. The optimum NOHM‐I‐PEI loading and sorption temperature are found to be ≈49 wt% and 50 °C, respectively, and NPEI‐SIPs exhibit great thermal stability over 20 CO2 capture/sorbent regeneration temperature swing cycles. The pseudoequilibrium CO2 loadings of NPEI‐SIPs under humid conditions are as high as 3.1 mmol CO2 g−1NPEI − SIPs for 15 vol% CO2 (postcombustion capture) and 1.7 mmol CO2 g−1NPEI − SIPs for 400 ppm (direct air capture). These findings suggest that NPEI‐SIPs can effectively capture CO2 from a wide range of CO2 concentrations including direct air capture while allowing the flexible design of CO2 capture reactors by combining the benefits of liquid solvents and solid sorbents.
- Subjects
SOLVENTS; POLYMERS; THERMAL stability; CARBON dioxide; SURFACE area; SOLVENT analysis
- Publication
Advanced Functional Materials, 2021, Vol 31, Issue 21, p1
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.202010047