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Issue 34, 2013
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Limitations and high pressure behavior of MOF-5 for CO2 capture

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Abstract

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 °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.

Graphical abstract: Limitations and high pressure behavior of MOF-5 for CO2 capture

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Publication details

The article was received on 25 Apr 2013, accepted on 27 Jun 2013 and first published on 02 Jul 2013


Article type: Paper
DOI: 10.1039/C3CP51768C
Phys. Chem. Chem. Phys., 2013,15, 14319-14327

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    Limitations and high pressure behavior of MOF-5 for CO2 capture

    J. Y. Jung, F. Karadas, S. Zulfiqar, E. Deniz, S. Aparicio, M. Atilhan, C. T. Yavuz and S. M. Han, Phys. Chem. Chem. Phys., 2013, 15, 14319
    DOI: 10.1039/C3CP51768C

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