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Article Dans Une Revue Nature Communications Année : 2019

Fluorinated MOF platform for selective removal and sensing of SO2 from flue gas and air

Résumé

Conventional SO 2 scrubbing agents, namely calcium oxide and zeolites, are often used to remove SO 2 using a strong or irreversible adsorption-based process. However, adsorbents capable of sensing and selectively capturing this toxic molecule in a reversible manner, with in-depth understanding of structure-property relationships, have been rarely explored. Here we report the selective removal and sensing of SO 2 using recently unveiled fluorinated metal-organic frameworks (MOFs). Mixed gas adsorption experiments were performed at low concentrations ranging from 250 p.p.m. to 7% of SO 2. Direct mixed gas column breakthrough and/or column desorption experiments revealed an unprecedented SO 2 affinity for KAUST-7 (NbOFFIVE-1-Ni) and KAUST-8 (AlFFIVE-1-Ni) MOFs. Furthermore, MOF-coated quartz crystal microbalance transducers were used to develop sensors with the ability to detect SO 2 at low concentrations ranging from 25 to 500 p.p.m.

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Chimie
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Dates et versions

hal-02088558 , version 1 (03-04-2019)

Identifiants

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M. R Tchalala, P.M Bhatt, K. N Chappanda, S. R Tavares, K. Adil, et al.. Fluorinated MOF platform for selective removal and sensing of SO2 from flue gas and air. Nature Communications, 2019, 10 (1), pp.23955 - 6900. ⟨10.1038/s41467-019-09157-2⟩. ⟨hal-02088558⟩
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