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Metal–Organic Frameworks with Reduced Hydrophilicity for Postcombustion CO2 Capture from Wet Flue Gas
- Source :
- ACS Sustainable Chemistry & Engineering. 6:11904-11912
- Publication Year :
- 2018
- Publisher :
- American Chemical Society (ACS), 2018.
-
Abstract
- Postcombustion CO2 capture from wet flue gas is a daunting challenge that metal–organic-framework-based (MOF-based) adsorbents need to address, because the moisture in the gas stream may not only hydrolyze the coordination bonds of MOFs but also be competitively adsorbed in MOFs leading to compromised CO2 capture performance. In this study, two isostructural water-stable MOFs decorated with alkyl groups, namely, UiO-66(Zr)-(OAc)2 and UiO-66(Zr)-(OPr)2, are synthesized from UiO-66(Zr)-(OH)2 via a facile postsynthetic esterification strategy and evaluated for their water affinity and CO2 capture performance. The increased water contact angle and reduced water vapor capacity at 60% relative humidity indicate the positive role of the propionyl group of UiO-66(Zr)-(OPr)2 in reducing material hydrophilicity. When the adsorbent beds are not fully saturated with water, breakthrough experiments using simulated wet flue gas reveal that UiO-66(Zr)-(OPr)2 possesses a CO2/N2 adsorption selectivity of 76.6, which is 22...
- Subjects :
- chemistry.chemical_classification
Flue gas
Moisture
Renewable Energy, Sustainability and the Environment
Chemistry
General Chemical Engineering
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Pressure swing adsorption
Contact angle
Adsorption
Chemical engineering
Environmental Chemistry
Metal-organic framework
0210 nano-technology
Alkyl
Water vapor
Subjects
Details
- ISSN :
- 21680485
- Volume :
- 6
- Database :
- OpenAIRE
- Journal :
- ACS Sustainable Chemistry & Engineering
- Accession number :
- edsair.doi...........a00aeebf28d739600b46002482e589e7