Carbonate-ceramic dual-phase membrane for carbon dioxide separation

Matthew Anderson, Jerry Lin

Research output: Contribution to journalArticle

102 Citations (Scopus)

Abstract

A new carbonate-ceramic dual-phase membrane for high temperature CO2 separation was synthesized from porous La0.6Sr0.4Co0.8Fe0.2O3-δ (LSCF) supports infiltrated with a eutectic molten carbonate (Li2CO3/Na2CO3/K2CO3) mixture. Helium permeances of the LSCF support before and after infiltration of molten carbonate were found to be on the order of 10-6 and less than 10-10molm-2s-1Pa-1 respectively. On average, supports were found to increase in weight by 33% after infiltration. High temperature CO2 permeation experiments were carried out for several membranes of varying thickness under low oxygen partial pressure (PO2=10-4 atm). Maximum permeances of 2.01, 3.73, 4.63 and 4.77×10-8molm-2s-1Pa-1 were obtained at 900°C for dual-phase membranes with thicknesses of 3.0, 1.5, 0.75 and 0.375mm respectively. A CO2/Ar separation factor of at least 225 was achieved at 900°C for the 0.375mm thick membrane. The activation energy for CO2 permeation for these membranes was calculated to be 86.4-89.9kJmol-1 depending on membrane thickness. Experimental CO2 permeation data can be well predicted by a model that considers oxygen ionic conduction in the solid phase of LSCF support in conjunction with structure data for the molten carbonate and LSCF solid phases that was characterized by helium permeation and electrical conductivity measurements.

Original languageEnglish (US)
Pages (from-to)122-129
Number of pages8
JournalJournal of Membrane Science
Volume357
Issue number1-2
DOIs
StatePublished - Jul 2010

Fingerprint

Carbonates
Ceramics
Carbon Dioxide
carbon dioxide
carbonates
Carbon dioxide
ceramics
membranes
Membranes
Permeation
Molten materials
Helium
infiltration
Infiltration
solid phases
helium
Oxygen
Ionic conduction
Electric Conductivity
Temperature

Keywords

  • Carbon dioxide separation
  • Ionic conductivity
  • Molten carbonate
  • Perovskite

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Science(all)
  • Biochemistry
  • Filtration and Separation

Cite this

Carbonate-ceramic dual-phase membrane for carbon dioxide separation. / Anderson, Matthew; Lin, Jerry.

In: Journal of Membrane Science, Vol. 357, No. 1-2, 07.2010, p. 122-129.

Research output: Contribution to journalArticle

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