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

doi:10.1038/s41467-019-09157-2

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

Nat Commun. 2019 Mar 22;10(1):1328. doi: 10.1038/s41467-019-09157-2.

Authors

M R Tchalala¹, P M Bhatt¹, K N Chappanda², S R Tavares³, K Adil¹, Y Belmabkhout¹, A Shkurenko¹, A Cadiau¹, N Heymans⁴, G De Weireld⁴, G Maurin³, K N Salama⁵, M Eddaoudi⁶

Affiliations

¹ Functional Materials Design, Discovery and Development Research Group (FMD³), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
² Sensors Lab, Advanced Membranes and Porous Materials Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
³ Institut Charles Gerhardt Montpellier (UMR CNRS 5253), Université Montpellier, Place Eugène Bataillon, 34095, Montpellier, Cedex 05, France.
⁴ Service de thermodynamique, Faculté Polytechnique de Mons, Université de Mons, 20 Place du Parc, B-7000, Mons, Belgium.
⁵ Sensors Lab, Advanced Membranes and Porous Materials Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia. khaled.salama@kaust.edu.
⁶ Functional Materials Design, Discovery and Development Research Group (FMD³), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia. mohamed.eddaoudi@kaust.edu.

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.

Publication types

Research Support, Non-U.S. Gov't