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

Published: 1 May 2019| Version 2 | DOI: 10.17632/2psz7hz8xv.2
Contributors:
Daniel Marinha, Mathieu Duttine, Marlu César Steil, Jacques Fouletier, Alain Wattiaux, Corinne Salles

Description

Oxygen transport membranes are widely considered as a potential solution to limit the carbon footprint, but are notoriously afflicted by performance issues due to long-term chemical instability under operation conditions. This paper evaluates the stability of CaTi0.9Fe0.1O3−δ (CTF) and address its potential applicability as oxygen transport membrane material. The redox stability of CTF was investigated using thermal gravimetric up to 1000 °C under air and H2, coupled with XRD and Mossbauer analysis. The redox potential of iron was measured using an electrochemical potential relaxation as a function of temperature. The reference oxygen semi-permeability flux of dense CTF membranes was measured in air/argon or air/helium, and the stability assessed between 700 and 900 °C for up to 1600 hours, in presence of simulated operation atmospheres of dry and humidified 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.

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Membranes Separation, Electroceramics, Solid State Electrochemistry

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