Ce0.9Gd0.1O2-δ-based multi-phase membranes with high CO2-tolerance. Issue 12 (15th June 2021)

• Record Type: Journal Article
• Authors: Liu, Yuliang; van Sint Annaland, Martin; Gallucci, Fausto
• Is Part Of: Ceramics international. Volume 47:Issue 12(2021)
• Page Start: 17768
• Page End: 17777
• Publication Date: 2021-06-15
• Subjects: Oxygen permeable membrane -- Dual-phase membrane -- Triple-phase membrane -- CO2-Tolerance; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.03.099
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this work, the oxygen ionic conductor Ce0.9 Gd0.1 O2-δ was paired with the electronic/mixed conductive oxides, including NiFe2 O4 (NFO), La2 NiO4+δ (LNO) and Ba0·5 Sr0·5 Co0·8 Fe0·2 O3-δ (BSCF), forming three kinds of dual-phase membranes. The performance of the membranes was compared in terms of oxygen flux and CO2 tolerance. The CGO/BSCF provided the highest permeation flux among the three composites with either helium or CO2 fed as the sweep gas, although a sharp decrease of the permeation value was observed for the CGO/BSCF when CO2 was in contact with the membrane. Based on the results for the dual-phase membranes, some CGO/BSCF/NFO triple-phase membranes were developed. The triple-phase membranes were found be less sensitive to the presence of CO2 in the sweep gas than the CGO/BSCF, and the application of the two triple-phase composites instead of the dual-phase ones promoted the oxygen permeation fluxes when the membranes were swept with pure CO2 . The results provide valuable information for the material selection and performance optimization of CGO-based multi-phase membranes for oxygen permeation.