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Composite amine mixed matrix membranes for high-pressure CO 2 -CH 4 separation: Synthesis, characterization and performance evaluation: Composite Amine Mixed Matrix Membranes

Royal Society Open Science, ISSN: 2054-5703, Vol: 7, Issue: 9, Page: 200795
2020
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Article Description

The key challenge in the synthesis of composite mixed matrix membrane (MMMs) is the incompatible membrane fabrication using porous support in the dry-wet phase inversion technique. The key objective of this research is to synthesize 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 (CO 2) from methane (CH 4) at high-pressure applications. The developed membranes were evaluated for their morphological structure, thermal and mechanical stabilities, functional groups, as well as for CO 2 -CH 4 separation performance at high pressure (10-30 bar). The results showed that the developed membranes have asymmetric structure, and they are mechanically strong at 30 bar. This new class of PES/CMS/DEA composite MMMs exhibited improved gas permeance compared to pure PES composite polymeric membrane. CO 2 -CH 4 perm-selectivity 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 than 2% and R 2 = 0.99.

Bibliographic Details

Fauzan, Nur Aqilah Bt; Mukhtar, Hilmi; Nasir, Rizwan; Mohshim, Dzeti Farhah Bt; Arasu, Naviinthiran; Man, Zakaria; Mannan, Hafiz Abdul

The Royal Society

Multidisciplinary

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