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

M.R. Tchalala, P.M. Bhatt, K.N. Chappanda, S.R. Tavares, K. Adil, Y. Belmabkhout, A. Shkurenko, A. Cadiau, N. Heymans, G. De Weireld, G. Maurin, K.N. Salama, M. Eddaoudi
Nature Communicationsvolume 10, Article number: 1328, (2019)

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

Keywords

Metal-Organic Framework,  MOFs, SO2 removal, Flue gas, Gas adsorption, Sensors

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, MOFcoated 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.

Code

https://doi.org/10.1038/s41467-019-09157-2

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