Structure-Transport Relationships of Water-Organic Solvent Co-transport in Carbon Molecular Sieve (CMS) Membranes.

ABSTRACT: We explore the effects of the carbon molecular sieve (CMS) microstructure on the separation performance and transport mechanism of water-organic mixtures. Specifically, we utilize PIM-1 dense films and integrally skinned asymmetric hollow fiber membranes as polymer precursors for the CMS materials. The PIM-1 membranes were pyrolyzed under several different pyrolysis atmospheres (argon, carbon dioxide, and diluted hydrogen gas) and at multiple pyrolysis temperatures. Detailed gas physisorption measurements reveal that membranes pyrolyzed under 4% H₂ and CO₂ had broadened ultramicropore distributions (pore diameter <7 Å) compared to Ar pyrolysis, and pyrolysis under CO₂ increased ultramicropore volume and broadened micropore distributions at increased pyrolys

SUBMITTER: Yoon YH 

PROVIDER: S-EPMC10636745 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature