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Novel Application of a Polyurethane Membrane for Efficient Separation of Hydrogen Sulfide from Binary and Ternary Gas Mixtures
Journal article   Peer reviewed

Novel Application of a Polyurethane Membrane for Efficient Separation of Hydrogen Sulfide from Binary and Ternary Gas Mixtures

Morteza Sadeghi, Mohammad Mehdi Talakesh, Ahmad Arabi Shamsabadi and Masoud Soroush
ChemistrySelect (Weinheim), v 3(11), pp 3302-3308
22 Mar 2018
DOI: https://doi.org/10.1002/slct.201703170
Featured in Collection :   UN Sustainable Development Goals @ Drexel

Abstract

Chemistry Chemistry, Multidisciplinary Physical Sciences Science & Technology
Recently we introduced a new polyurethane (PU) membrane synthesized from polypropylene glycol (PPG), hexamethylene diisocyanate (HDI), and 1, 4-butane diol (BDO), and then studied the performance of the membrane for CO2 removal. This paper presents a novel application of the PPG-HDI-BDO membrane for separation of H2S in binary and ternary gas mixtures. The gas transport properties of the membrane in binary H2S/CH4 and ternary CH4/CO2/H2S gas mixtures at different temperatures, pressures, and gas compositions are investigated. Permeation tests show that the membrane has a high H2S/CH4 selectivity (27.2), an outstanding H2S permeability of 790 Barrer, and a remarkable CO2 permeability of 473 Barrer. The H2S permeability of 790 Barrer is the highest reported to this date for all PU membranes. The H2S permeability and H2S/CH4 selectivity of the membrane increases with temperature. As the operating pressure increases, the CO2/CH4 and H2S/CH4 selectivities of the membrane increases. H2S and CO2 permeabilities and H2S/CH4 and CO2/CH4 selectivities increase, as the H2S content of the feed increases. Solubility is most likely the dominant mechanism of gas permeation in this membrane. As the CO2 content of the feed stream increases, the H2S permeability and H2S/CH4 selectivity of the membrane decreases. The membrane has maximum H2S/CH4 selectivities of 27.4 in binary H2S/CH4 (with 0.075mol% H2S) and 27.2 in ternary CH4/CO2/H2S (with 0.66mol% H2S).

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31 citations in Web of Science
33 citations in Scopus

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#13 Climate Action

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Chemistry, Multidisciplinary
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