High CO2 resistance of indium-doped cobalt-free 60 wt.%Ce0.9Pr0.1O2-δ-40 wt.%Pr0.6Sr0.4Fe1-xInxO3-δ oxygen transport membranes. Issue 1 (1st January 2022)

• Record Type: Journal Article
• Authors: Huang, Yanhao; Zhang, Chao; Wang, Xiaopeng; Li, Dongcheng; Zeng, Lingyong; He, Yiyi; Yu, Peifeng; Luo, Huixia
• Is Part Of: Ceramics international. Volume 48:Issue 1(2022)
• Page Start: 415
• Page End: 426
• Publication Date: 2022-01-01
• Subjects: Dual-phase membrane -- Indium substitution -- Oxygen transport membrane -- Gas separation -- CO2 tolerance; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.09.117
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The oxygen transport membrane (OTM) has huge application prospects in gas separation and carbon neutralization based on oxygen enriched combustion. In this paper, the family 60 wt.%Ce0.9 Pr0.1 O2-δ -40 wt.%Pr0.6 Sr0.4 Fe1- x In x O3-δ (CPO-PSF1- x I x O, x = 0.01, 0.025, 0.05, 0.075, 0.1) cobalt-free dual-phase MIEC OTMs doped with indium have been successfully prepared by Pechini method. The phase structure, surface morphology, element distribution, oxygen permeability, and long-term operation stability of these OTMs are systematically explored. Among these OTMs, the champion oxygen permeable flux of CPO-PSF0.99 I0.01 O reaches 1.07 mL min −1 ·cm −2 and 0.80 mL min −1 ·cm −2 at 1000 °C under air/He gradient and air/CO2 gradient. Meanwhile, CPO-PSF0.99 I0.01 O maintains the value of 0.80 mL min −1 ·cm −2 steadily at 1000 °C for 100 h when pure CO2 as the sweep gas. The surface element distribution and phase structure of the OTMs after long-term oxygen permeability reaction are investigated by XRD, SEM combining with EDS, where the spent membranes retain the same structure and component as the fresh membranes, demonstrating that the In-doped OTMs have an excellent CO2 tolerance. Suitable indium substitution for iron of these OTMs not only improves the oxygen permeability, but also maintains the long-term reaction stability of the material. Graphical abstract: Image 1