A metal-organic framework-based splitter for separating propylene from propane

Amandine Cadiau, Karim Adil, Prashant Bhatt, Youssef Belmabkhout, Mohamed Eddaoudi

Research output: Contribution to journalArticlepeer-review

484 Scopus citations

Abstract

The chemical industry is dependent on the olefin/paraffin separation, which is mainly accomplished by using energy-intensive processes. We report the use of reticular chemistry for the fabrication of a chemically stable fluorinated metal-organic framework (MOF) material (NbOFFIVE-1-Ni, also referred to as KAUST-7). The bridging of Ni(II)-pyrazine square-grid layers with (NbOF5)2- pillars afforded the construction of a three-dimensional MOF, enclosing a periodic array of fluoride anions in contracted square-shaped channels. The judiciously selected bulkier (NbOF5)2- caused the looked-for hindrance of the previously free-rotating pyrazine moieties, delimiting the pore system and dictating the pore aperture size and its maximum opening. The restricted MOF window resulted in the selective molecular exclusion of propane from propylene at atmospheric pressure, as evidenced through multiple cyclic mixed-gas adsorption and calorimetric studies.
Original languageEnglish (US)
Pages (from-to)137-140
Number of pages4
JournalScience
Volume353
Issue number6295
DOIs
StatePublished - Jul 7 2016

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