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Steam-promoted CO2 flux in dual-phase CO2 separation membranes

Steam-promoted CO2 flux in dual-phase CO2 separation membranes

Category
Journal publication
Abstract
Steam dissolving into molten carbonates through the formation of hydroxide ions could contribute to the permeation of CO2 in dual-phase membranes under certain conditions. In this work, ceria (CeO2) supported dual-phase membranes was fabricated and the effect of steam on the transport properties has been investigated by means of flux measurements. The results show an approximate 30% increase of the CO2 flux when 2.5% steam is introduced to the feed side, while an approximate 250–300% increase of the CO2 flux is observed when introducing the same amount of steam to the sweep side. These phenomena and transport mechanisms are explained by the theory of ambipolar permeation of CO2 via various combinations of charged species.
Client
  • Norges forskningsråd / 207841
Language
English
Author(s)
Affiliation
  • SINTEF Industry / Sustainable Energy Technology
Year
2015
Published in
Journal of Membrane Science
ISSN
0376-7388
Publisher
Elsevier
Volume
482
Page(s)
115 - 119