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

Mohammed Tchalala, Prashant Bhatt, Karumbaiah Chappanda Nanaiah, S R Tavares, Karim Adil, Youssef Belmabkhout, Aleksander Shkurenko, Amandine Cadiau, N Heymans, G De Weireld, G Maurin, Khaled N. Salama, Mohamed Eddaoudi

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73 Scopus citations

Abstract

Conventional SO2 scrubbing agents, namely calcium oxide and zeolites, are often used to remove SO2 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 SO2 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 SO2. Direct mixed gas column breakthrough and/or column desorption experiments revealed an unprecedented SO2 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 SO2 at low concentrations ranging from 25 to 500 p.p.m.
Original languageEnglish (US)
JournalNature Communications
Volume10
Issue number1
DOIs
StatePublished - Mar 22 2019

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