Articles & Issues
- Language
- English
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- Publication history
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Received June 24, 2023
Accepted November 17, 2023
- Acknowledgements
- Natural gas sweetening · Facilitated transport mechanism · Modifi ed silica nanoparticle · Mixed matrix membrane · Hydrogen sulfi de
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
All issues
Enhanced Natural Gas Sweetening with Ultralow H 2 S Concentration via Polycarbonate-Silica Mixed Matrix Membranes
Abstract
Mixed matrix membranes (MMMs) are brought up as prospecting media to sweeten natural gas in recent decades. But the
majority of experiments have conducted on CO 2 /CH 4 gas pair separation, and H 2 S removal from CH 4 through MMMs has
been paid less consideration. Thereupon, polycarbonate (PC) permeability and permselectivity as a polymer with inherent
gas transport properties and two PC-based MMMs containing octylsilane (OS) and polydimethylsiloxane (PDMS)-modifi ed
nanosilica were investigated under various operational conditions for this gas couple. The infl uence of operational parameters
including transmembrane pressure, feed temperature, H 2 S inlet concentration and physical aging on the permeability
of mixed gas and selectivity of the H 2 S/CH 4 pair was assessed. It was observed that addition of silica nanoparticles causes
more H 2 S permeability and selectivity. As a result, it can be used for methane upgradation. Membranes fabricated with
PDMS-modifi ed nanosilica showed the highest permeability of H 2 S and also the superior selectivity of H 2 S/CH 4 . Therefore,
it could be possibly applied to mitigation of H 2 S concentration in the outlet gas stream.
