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dc.contributor.authorXu, Wenqi
dc.contributor.authorLindbråthen, Arne
dc.contributor.authorJanakiram, Saravanan
dc.contributor.authorAnsaloni, Luca
dc.contributor.authorDeng, Liyuan
dc.identifier.citationJournal of Membrane Science, 671, 121397, 1-11.en_US
dc.description.abstractMembrane technology for CO2/H2 separation, especially when using CO2-selective membranes to keep H2 on the high-pressure retentate side, has been considered promising and energy-efficient for further H2 transport and utilization. This work prepared and optimized a CO2-selective membrane based on polyvinylamine (PVAm) with embedded graphene oxide (GO) and grafted GO for CO2/H2 separation. The facilitated transport effect of PVAm enhances CO2 transport, while the GO-based 2D nanosheets bring in a barrier effect to compensate for the high H2 diffusivity. The GO-modified surface with higher CO2 affinity also provides additional CO2 sorption sites. The membranes’ chemical structure, thermal stability, and morphology were characterized. The effects of GO and PVA-GO in the PVAm matrix and optimal loadings of GO or PVA-GO were investigated. Introducing GO into PVAm significantly increased CO2 permeance with a slight increase in CO2/H2 selectivity. While by adding 0.5 wt% PVA-GO, CO2/H2 selectivity significantly increased from 10 to 22. The selective layer thickness also greatly affects CO2/H2 separation. By increasing the coating layer thickness to approx. 11 μm, the CO2/H2 selectivity substantially increased. The separation performances of the studied membrane are far above the current CO2/H2 upper bound.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.subjectH2 purificationen_US
dc.subjectCO2 separationen_US
dc.subjectNanocomposite membraneen_US
dc.subjectFacilitated transporten_US
dc.subjectGraphene oxideen_US
dc.titleEnhanced CO2/H2 separation by GO and PVA-GO embedded PVAm nanocomposite membranesen_US
dc.title.alternativeEnhanced CO2/H2 separation by GO and PVA-GO embedded PVAm nanocomposite membranesen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© 2023 The Authors. Published by Elsevier B.V.en_US
dc.source.journalJournal of Membrane Scienceen_US
dc.relation.projectNorges forskningsråd: 294533en_US

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal