W-doped Lanthanum Molybdenum Oxide/Lithium-Sodium-Potassium Carbonate Composite Membranes for Carbon Dioxide Permeation
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Single-phase tungsten-doped lanthanum molybdenum oxide (La2MoWO9) ceramic powders
were synthesized using the complex polymerization technique. Porous ceramic pellets were
obtained by thermally removing graphite, which served as a pore former. The porous pellets were
then impregnated with molten eutectic lithium-sodium-potassium carbonates. The energy dispersive
X-ray analysis and scanning electron microscopy (FEG-SEM) images of the external and fracture
surfaces of the La2MoWO9-(Li,Na,K)2CO3 composite dual-phase membrane revealed the percolation
of the carbonate mixture through the pores. Electrochemical impedance spectroscopy measurements
conducted at temperatures below and above the melting point of the eutectic carbonate composition
demonstrated the contributions of oxygen and carbonate ions to the ionic conductivity of the dual
membrane. The electrical conductivity of the carbonate ions within the membrane was continuously
monitored for over 1300 h with negligible degradation, implying that the membrane could be used
for long-term monitoring of CO2 without aging effects. A comparison of FEG-SEM images taken
before and after this endurance test suggested minimal fouling, indicating that the membrane could
potentially replace similar zirconia- and ceria-based composite membranes.
Como referenciar
MEDINA, MIDILANE S.; CARVALHO, SABRINA G.M.; TABUTI, FRANCISCO N.; MUCCILLO, ELIANA N.S.; FONSECA, FABIO C.; MUCCILLO, REGINALDO. W-doped Lanthanum Molybdenum Oxide/Lithium-Sodium-Potassium Carbonate Composite Membranes for Carbon Dioxide Permeation. Materials, v. 16, n. 14, p. 1-14, 2023. DOI: 10.3390/ma16145128. Disponível em: http://repositorio.ipen.br/handle/123456789/34356. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.