Carbon dioxide permeation properties and stability of samarium-doped-ceria carbonate dual-phase membranes

Tyler T. Norton, Bo Lu, Jerry Lin

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

This study examines high temperature carbon dioxide permeation properties and long-term permeation stability of samarium doped ceria (SDC)-carbonate dual-phase membranes. Hermetic SDC-carbonate membranes were prepared by infiltrating porous SDC ceramic support with Li/K/Na molten carbonate. Carbon permeation experiments on the SDC-carbonate membranes were conducted with either atmospheric or high pressure feed of CO2:N2 mixture or simulated syngas with composition of 50% CO, 35% CO2, 10% H2, and 5% N2. The SDC-carbonate membranes exhibit CO2 permeation flux in the range of 0.2-0.8mL(STP)cm-2min-1 in 700-950°C with measured CO2 to N2 separation factor above 1000. The CO2 permeation flux shows power function dependence with CO2 partial pressure and exponential dependence with temperature. The activation energy for CO2 permeation is 63kJmol-1, similar to that for oxygen ionic conduction in SDC. Essentially the same CO2 permeation characteristics are observed for the membranes with CO2:N2 and simulated syngas feeds. The membranes exhibit stable long-term permeation flux in 700-900°C with either CO2:N2 or simulated gas feed at atmospheric pressure or high pressure (5atm) for various periods of testing time (as long as 35 days). The membranes, with remarkable permeation stability in the presence of H2, show only slight decomposition of the ceramic phase after long-term exposure to feed gas mixtures at high temperature.

Original languageEnglish (US)
Pages (from-to)244-252
Number of pages9
JournalJournal of Membrane Science
Volume467
DOIs
StatePublished - Oct 1 2014

Fingerprint

Samarium
samarium
Carbonates
Cerium compounds
Carbon Dioxide
Permeation
carbon dioxide
carbonates
Carbon dioxide
membranes
Membranes
synthesis gas
Ceramics
Temperature
atmospheric pressure
Fluxes
Gases
ceramics
testing time
Pressure

Keywords

  • Carbon dioxide permeation
  • Ceramic-carbonate
  • Fluorite
  • Membrane stability
  • Samarium doped ceria

ASJC Scopus subject areas

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

Cite this

Carbon dioxide permeation properties and stability of samarium-doped-ceria carbonate dual-phase membranes. / Norton, Tyler T.; Lu, Bo; Lin, Jerry.

In: Journal of Membrane Science, Vol. 467, 01.10.2014, p. 244-252.

Research output: Contribution to journalArticle

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