期刊
ADVANCED FUNCTIONAL MATERIALS
卷 31, 期 21, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202010047
关键词
CO; (2) capture; direct air capture; encapsulation; functionalized nanoparticles; sorbents
类别
资金
- Shell's New Energy Research and Technology (NERT) Program
- Lawrence Livermore National Laboratory (LLNL) [DE-AC52-07NA27344, LLNL-JRNL-815333]
Hybrid CO2 capture materials known as solvent impregnated polymers (SIPs) have been developed to improve the capture kinetics of high viscosity water-lean solvents. By incorporating liquid-like nanoparticle organic hybrid materials functionalized with polyethylenimine (NOHM-I-PEI) into a shell material and UV-curing it, gas-permeable solid sorbents with uniform loading (NPEI-SIPs) are produced. The CO2 capture kinetics of NPEI-SIPs have shown a significant increase due to the SIP design, providing a larger interfacial surface area for CO2 adsorption. The optimal loading of NOHM-I-PEI and sorption temperature were found to be around 49 wt% and 50 degrees Celsius, respectively, while NPEI-SIPs exhibited good thermal stability over multiple temperature swing cycles. Under humid conditions, NPEI-SIPs demonstrated high CO2 loadings for different concentrations, suggesting their effectiveness in capturing CO2 from various sources.
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 approximate to 49 wt% and 50 degrees 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(NPEI - SIPs)(-1) for 15 vol% CO2 (postcombustion capture) and 1.7 mmol CO2 g(NPEI - SIPs)(-1) 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.
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