SALLES, C.; STEIL, Marlu César; FOULETIER, Jacques; DUTTINE, Mathieu; WATTIAUX, Alain; MARINHA, Daniel

doi:10.1016/j.memsci.2019.04.049

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SALLES, C.
Laboratoire de Synthèse et Fonctionnalisation des Céramiques [LSFC]
Matériaux Interfaces ELectrochimie [MIEL ]

STEIL, Marlu César
Matériaux Interfaces ELectrochimie [MIEL ]

FOULETIER, Jacques
Matériaux Interfaces ELectrochimie [MIEL ]

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Journal of Membrane Science. 2019-08, vol. 583, p. 171-179

Elsevier

Resumen en inglés

Oxygen transport membranes (OTM) are widely considered as a possible solution to limit the carbon footprint, but are notoriously afflicted by performance issues due to chemical instability observed during long-term operation. This paper reports on the stability of an OTM made of CaTi0.9Fe0.1O3−δ (CTF), and addresses its applicability. The redox stability of CTF was investigated using thermal gravimetry up to 1000 °C under air and H2, coupled with XRD and Mössbauer analyses. The redox potential of iron was measured using an electrochemical potential relaxation as a function of temperature. The baseline oxygen semi-permeability flux of dense CTF membranes was measured in inert atmospheres (air/argon or air/helium), and the long-term stability established for up to 1600 h under simulated operation atmospheres containing CO, CO2, H2 and CH4. CTF shows a remarkable performance stability and post mortem XRD, SEM-EDS and Raman analyses show no evidence of decomposition or reaction byproducts.< Leer menos

Palabras clave en inglés

Oxygen transport membranes

Oxycombustion

Methane

Stability

Ageing

CTF

OTM

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Long-term stability of iron-doped calcium titanate CaTi0.9Fe0.1O3−δ oxygen transport membranes under non-reactive and reactive atmospheres

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