Effects of Al content on the oxygen permeability through dual-phase membrane 60Ce0.9Pr0.1O2-δ-40Pr0.6Sr0.4Fe1-xAlxO3-δ. Issue 16 (November 2019)

• Record Type: Journal Article
• Authors: Shi, Lei; Wang, Shu; Lu, Tianni; He, Yuan; Yan, Dong; Lan, Qi; Xie, Zhiang; Wang, Haoqi; Boubeche, Mebrouka; Luo, Huixia
• Is Part Of: Ceramics international. Volume 45:Issue 16(2019)
• Page Start: 20033
• Page End: 20039
• Publication Date: 2019-11
• Subjects: Ceramic composite -- Oxygen separation -- Mixed ionic-electronic conductor -- Al-containing membrane -- Modified Pechini method; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.06.264
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Ceramic dual-phase oxygen transport membranes with the composition of 60 wt% Ce0.9 Pr0.1 O2- δ -40 wt%Pr0.6 Sr0.4 Fe1- x Al x O3- δ ( x = 0.05, 0.1, 0.2, 0.3, 0.4, 0.6, 0.8, 1.0) (60CPO-40PSF1- x A x O) based on 60Ce0.9 Pr0.1 O2- δ -40Pr0.6 Sr0.4 FeO3- δ doped Al was successfully synthesized through a modified Pechini method. Crystal structure, surface microtopography and oxygen permeability are investigated systematically. The cell parameters of perovskite phase first increased and then decreased with the increase of Al content, which is related to the radius of the Al 3+ and the formation of impurity phase. As x ranges from 0.1 to 0.8, the oxygen permeability of the materials first increases and then decreases, and the maximum value of oxygen permeation rate for 60CPO-40PSF1- x A x O membranes with 0.4 mm thickness at 1000 °C is 1.12 mL min −1 cm −2 when x = 0.4. XRD measurements revealed high temperature stability and CO2 -tolerant property of the dual-phase composites. The partial replacement of Fe 3+ /Fe 4+ by Al 3+ causes the material not only to exhibit good stability, but also to increase the oxygen permeability of the membranes. Graphical abstract: Image 1