Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 15, Issue 34, Pages 14319-14327Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp51768c
Keywords
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Funding
- National Research Foundation of Korea [4.0007357, 2011-0014939, 2012K2A1A2033178]
- Korean government (MEST)
- NPRP from the Qatar National Research Fund (a member of Qatar Foundation) [5-499-1-088]
- Korea CCS RD Center
- Ministry of Education, Science and Technology of Korean government
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Science, ICT & Future Planning [2013R1A1A1012998]
- IWT [NRF-2012-C1AAA001-M1A2A2026588]
- KAIST EEWS Initiative
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Porous network structures (e. g. metal-organic frameworks, MOFs) show considerable potential in dethroning monoethanol amine (MEA) from being the dominant scrubber for CO2 at the fossil-fuel-burning power generators. In contrast to their promise, structural stability and high-pressure behavior of MOFs are not well documented. We herein report moisture stability, mechanical properties and high-pressure compression on a model MOF structure, MOF-5. Our results show that MOF-5 can endure all tested pressures (0-225 bar) without losing its structural integrity, however, its moist air stability points at a 3.5 hour safety window (at 21.6 degrees C and 49% humidity) for an efficient CO2 capture. Isosteric heats of CO2 adsorption at high pressures show moderate interaction energy between CO2 molecules and the MOF-5 sorbent, which combined with the large sorption ability of MOF-5 in the studied pressure-temperature ranges show the viability of this sorbent for CO2 capturing purposes. The combination of the physicochemical methods we used suggests a generalized analytical standard for measuring viability in CO2 capture operations.
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