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A partially interpenetrated metal-organic framework for selective hysteretic sorption of carbon dioxide

Lookup NU author(s): Emeritus Professor Mark ThomasORCiD

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Abstract

The selective capture of carbon dioxide in porous materials has potential for the storage and purification of fuel and flue gases. However, adsorption capacities under dynamic conditions are often insufficient for practical applications, and strategies to enhance CO2-host selectivity are required. The unique partially interpenetrated metal-organic framework NOTT-202 represents a new class of dynamic material that undergoes pronounced framework phase transition on desolvation. We report temperature-dependent adsorption/desorption hysteresis in desolvated NOTT-202a that responds selectively to CO2. The CO2 isotherm shows three steps in the adsorption profile at 195 K, and stepwise filling of pores generated within the observed partially interpenetrated structure has been modelled by grand canonical Monte Carlo simulations. Adsorption of N-2, CH4, O-2, Ar and H-2 exhibits reversible isotherms without hysteresis under the same conditions, and this allows capture of gases at high pressure, but selectively leaves CO2 trapped in the nanopores at low pressure.

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Author(s): Yang SH, Lin X, Lewis W, Suyetin M, Bichoutskaia E, Parker JE, Tang CC, Allan DR, Rizkallah PJ, Hubberstey P, Champness NR, Thomas KM, Blake AJ, Schroder M

Publication type: Article

Publication status: Published

Journal: Nature Materials

Year: 2012

Volume: 11

Issue: 8

Pages: 710-716

Print publication date: 03/06/2012

ISSN (print): 1476-1122

ISSN (electronic): 1476-4660

Publisher: Nature Publishing Group

URL: http://dx.doi.org/10.1038/NMAT3343

DOI: 10.1038/NMAT3343

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