Fabrication and Characterization of Aging Resistant Carbon Molecular Sieve Membranes for C₃ Separation Using High Molecular Weight Crosslinkable Polyimide, 6FDA-DABA

item.page.doi

Abstract

Although propylene/propane separation remains a challenge for industrial processes, carbon molecular sieve membranes (CMSMs) have the potential to replace traditional separation methods. A high molecular weight crosslinkable polyimide was utilized to fabricate CMSMs, which showed pure gas permeabilities in excess of 400 barrers with propylene/propane selectivities as high as 25. Mixed gas (C₃H₈:C₃H₆ 50:50) measurements yielded a propylene permeability of 257 barrers and a selectivity of 20. CMSMs from thermally precrosslinked polymer precursors demonstrated a 98% propylene permeability retention after aging for 20 days under vacuum. Active gas flow conditions resulted in slightly lower permeability retention (92.5%) after 15 days of testing. ©2019 Elsevier B.V.

Description

Due to copyright restrictions full text access from Treasures at UT Dallas is restricted to current UTD affiliates (use the provided Link to Article).

Keywords

6FDA-DABA, Aging, Carbon molecular sieve membranes, Propylene/propane separation, Thermal crosslinking, Hexafluoroisopropylidene diphthalic anhydride, Diaminobenzoic acid, Pyromellitic dianhydride, Biphenyltetracarboxylic dianhydride, Dimethylacetamide, Methyl-2-pyrrolidone, Gel permeation chromatography, Tetrahydrofuran, Thermogravimetry, Scanning electron microscopy

item.page.sponsorship

NSF (CBET-1403950)

Rights

©2019 Elsevier B.V. All Rights Reserved.

Citation