Mixed ionic electronic conducting perovskites oxygen transport membrane on alumina hollow fibre substrates for oxygen enrichment / Ainun Sailah Sihar

Currently, large scale of oxygen production for air separation unit (ASU) in carbon capture storage (CCS) is carried out using cryogenic distillation. It is a mature technology but has several drawbacks such as energy extensive and high operational cost due to very low temperature and high pressure operating conditions. Therefore, this thesis focuses on the fabrication of mixed ionic electronic conducting (MIEC) perovskite oxygen transport membrane (OTM) on alumina hollow fibre substrate for production of oxygen from air. One of the main advantages of using perovskite-based membrane is their unique characteristic that only allows oxygen to pass through at temperature higher than 600 °C, leading to an infinite selectivity of oxygen to other gas species. A series of MIEC perovskites; SrCo0.8Fe0.2O3-δ (SCF), La0.6Sr0.4Co0.8Fe0.2O3-δ (LSCF) and La0.6Sr0.4Co0.2Ni0.8O3-δ (LSCNi) were prepared using Pechini sol-gel method and characterized using thermogravimetric analyzer (TGA), X-ray diffractometer (XRD) and Brunauer-Emmett-Teller (B.E.T.) surface area analyzer.