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Composite amine mixed matrix membranes for highpressure CO2-CH4 separation: synthesis, characterization and performance evaluation

Citation

Mukhtar, Hilmi et al. (2020), Composite amine mixed matrix membranes for highpressure CO2-CH4 separation: synthesis, characterization and performance evaluation, Dryad, Dataset, https://doi.org/10.5061/dryad.dfn2z34xv

Abstract

The key challenge in composite mixed matrix membrane (MMMs) synthesis is the incompatible membrane fabrication using porous support in the dry-wet phase inversion technique. The key objective of this research to synthesis thin composite ternary (amine) mixed matrix membranes on microporous support by incorporating 10 wt. % of carbon molecular sieve (CMS) and 5-15 wt. % of diethanolamine (DEA) in polyethersulfone (PES) dope solution for the separation of carbon dioxide (CO2) from methane (CH4). The developed membranes were evaluated for their morphological structure, thermal and mechanical stabilities, functional groups, as well as the CO2-CH4 separation performance at high pressure (10-30 bar). The results showed that the developed membranes have asymmetric structure, and mechanically strong at 30 bar. A new class of PES/CMS/DEA composite MMMs exhibited improved gas permeance compared to pure PES composite polymeric membrane. The permselectivty of CO2/CH4 enhanced from 8.15 to 16.04 at 15 wt.% of DEA at 30 bar pressure. The performance of amine composite MMMs is theoretically predicted using a modified Maxwell model. The predictions were in good agreement with experimental data after applying the optimized values with AARE % = ~ less 2 % and R2 = 0.99.