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SrCo0.9Sc0.1O3−δ perovskite hollow fibre membranes for air separation at intermediate temperatures
Authors:Bo Meng  Zhigang Wang  Xiaoyao Tan  Shaomin Liu
Affiliation:1. School of Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China;2. Department of Chemical Engineering, Curtin University of Technology, Perth, WA 6845, Australia;1. Department of Physical Chemistry and Technology of Polymers, Section of Physics and Applied Mathematics, Faculty of Chemistry, Silesian University of Technology, Strzody 9, 44-100 Gliwice, Poland;2. Institute of Chemical Technology, Faculty of Chemical Technology, Department of Polymers, Technicka 5, CZ-166 28 Prague 6, Czech Republic;1. School of Chemistry & Chemical Engineering, South China University of Technology, Wushan Road, Guangzhou 510640, China;2. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;3. Institute of Physical Chemistry and Electrochemistry, Leibniz University of Hannover, Callinstr. 3-3A D-30167 Hannover, Germany;1. Department of Chemical Engineering and Chemical Technology, Imperial College London, SW7 2AZ, London, UK;2. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology 5 Xinmofan Road, Nanjing 210009, PR China;1. School of Chemical Engineering, Shandong University of Technology, Zibo 255049, China;2. Department of Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China;3. Department of Chemical Engineering, Curtin University, Perth WA 6845, Australia
Abstract:SrCo0.9Sc0.1O3 (SCSc) perovskite powders with sub-micron particle size were synthesized by a modified Pechini method combined with a post-treatment of sintering and ball-milling. From the prepared powders, the SCSc hollow fibre membranes with asymmetric structure and gas-tight property were fabricated by spinning a polymer solution containing 58.4 wt% SCSc followed by sintering at 1200 °C for 5 h. The oxygen permeation properties of the obtained SCSc fibres were measured under air/He gradients at 500–800 °C. This showed the oxygen flux of 1 mL cm?2 min?1 at 750 °C and 4.41 mL cm?2 min?1 at 900 °C. Modeling analysis reveals that the oxygen permeation process is predominated by oxygen surface exchange kinetics with an activation energy of 95.0 kJ mol?1. The SCSc membranes showed excellent oxygen permeation performance while exhibiting high structural and permeating stability at intermediate temperatures (500–800 °C).
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