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Membranes 2016, 6(1), 16; doi:10.3390/membranes6010016

Detailed Investigation of Separation Performance of a MMM for Removal of Higher Hydrocarbons under Varying Operating Conditions

Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Geesthacht 21502, Germany
These authors contributed equally to this work.
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Author to whom correspondence should be addressed.
Academic Editor: Darrell Patterson
Received: 11 December 2015 / Revised: 14 February 2016 / Accepted: 16 February 2016 / Published: 25 February 2016
(This article belongs to the Special Issue New Developments in Hybrid and Mixed Matrix Membranes)
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Abstract

Mixed-matrix membranes (MMMs) are promising candidates to improve the competitiveness of membrane technology against energy-intensive conventional technologies. In this work, MMM composed of poly(octylmethylsiloxane) (POMS) and activated carbon (AC) were investigated with respect to separation of higher hydrocarbons (C3+) from permanent gas streams. Membranes were prepared as thin film composite membranes on a technical scale and characterized via scanning electron microscopy (SEM) and permeation measurements with binary mixtures of n-C4H10/CH4 under varying operating conditions (feed and permeate pressure, temperature, feed gas composition) to study the influence on separation performance. SEM showed good contact and absence of defects. Lower permeances but higher selectivities were found for MMM compared to pure POMS membrane. Best results were obtained at high average fugacity and activity of n-C4H10 with the highest selectivity estimated to be 36.4 at n-C4H10 permeance of 12 mN3/(m2·h·bar). Results were complemented by permeation of a multi-component mixture resembling a natural gas application, demonstrating the superior performance of MMM. View Full-Text
Keywords: mixed matrix membrane; activated carbon; gas permeation; n-butane/methane separation; operating conditions; multi-component mixture mixed matrix membrane; activated carbon; gas permeation; n-butane/methane separation; operating conditions; multi-component mixture
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MDPI and ACS Style

Mushardt, H.; Müller, M.; Shishatskiy, S.; Wind, J.; Brinkmann, T. Detailed Investigation of Separation Performance of a MMM for Removal of Higher Hydrocarbons under Varying Operating Conditions. Membranes 2016, 6, 16.

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