Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 48, Pages 14372-14377Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201506952
Keywords
adsorption; physisorption; temperature-programmed desorption; ultramicroporous materials; water stability
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Funding
- Science Foundation Ireland (SFI award) [13/RP/B2549]
- Science Foundation Ireland [07/SRC/B1160]
- Materials and Surface Science Institute at the University of Limerick
- Irish Research Council
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Sequestration of CO2, either from gas mixtures or directly from air (direct air capture, DAC), could mitigate carbon emissions. Here five materials are investigated for their ability to adsorb CO2 directly from air and other gas mixtures. The sorbents studied are benchmark materials that encompass four types of porous material, one chemisorbent, TEPA-SBA-15 (amine-modified mesoporous silica) and four physisorbents: Zeolite 13X (inorganic); HKUST-1 and Mg-MOF-74/Mg-dobdc (metal-organic frameworks, MOFs); SIFSIX-3-Ni, (hybrid ultramicroporous material). Temperature-programmed desorption (TPD) experiments afforded information about the contents of each sorbent under equilibrium conditions and their ease of recycling. Accelerated stability tests addressed projected shelf-life of the five sorbents. The four physisorbents were found to be capable of carbon capture from CO2-rich gas mixtures, but competition and reaction with atmospheric moisture significantly reduced their DAC performance.
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