Rational design of mixed-matrix metal-organic framework membranes for molecular separations

Shuvo Jit Datta, Alvaro Mayoral, Narasimha Murthy Srivatsa Bettahalli, Prashant M. Bhatt, Madhavan Karunakaran, Ionela Daniela Carja, Dong Fan, Paulo Graziane M. Mileo, Rocio Semino, Guillaume Maurin, Osamu Terasaki, Mohamed Eddaoudi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

177 Scopus citations

Abstract

Conventional separation technologies to separate valuable commodities are energy intensive, consuming 15% of the worldwide energy. Mixed-matrix membranes, combining processable polymers and selective adsorbents, offer the potential to deploy adsorbent distinct separation properties into processable matrix. We report the rational design and construction of a highly efficient, mixed-matrix metal-organic framework membrane based on three interlocked criteria: (i) a fluorinated metal-organic framework, AlFFIVE-1-Ni, as a molecular sieve adsorbent that selectively enhances hydrogen sulfide and carbon dioxide diffusion while excluding methane; (ii) tailoring crystal morphology into nanosheets with maximally exposed (001) facets; and (iii) in-plane alignment of (001) nanosheets in polymer matrix and attainment of [001]-oriented membrane. The membrane demonstrated exceptionally high hydrogen sulfide and carbon dioxide separation from natural gas under practical working conditions. This approach offers great potential to translate other key adsorbents into processable matrix.

Original languageEnglish (US)
Pages (from-to)1080-1087
Number of pages8
JournalSCIENCE
Volume376
Issue number6597
DOIs
StatePublished - Jun 3 2022

ASJC Scopus subject areas

  • General

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