Preparation of dense composite membrane with Ba-cerate conducting oxide and rapidly solidified Zr-based alloy |
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Authors: | Jin-Ho Kim Yong-Mook Kang Byoung-Goan KimSang-Hoon Lee Kwang-Taek Hwang |
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Affiliation: | a Icheon Branch, Korea Institute of Ceramic Engineering & Technology (KICET), Icheon-si, Gyeonggi-do, Republic of Korea b Division of Advanced Materials Engineering, Kongju National University, 275 Budae-dong, Cheonan, Chungnam 330-717, Republic of Korea c Korea Energy Materials Co.Ltd., 409 Daegu Technopark, 1-11 Hosan-Dong, Dalse-Gu 704-230, Republic of Korea |
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Abstract: | Hydrogen separation with dense ceramic membranes is non-galvanic, i.e. it does not require any electrode or an external power supply to drive the separation, and the hydrogen selectivity is almost 100% because the membrane contains no interconnected porosity. In this study, a mixed proton-electron conducting perovskite made from BaCe0.9Y0.1O3-δ (BCYO) was prepared using a solid-state reaction, whereas a rapidly solidified Zr-based alloy (RSZ) was obtained via a melt-spinning process at a specified cooling rate. Finally, the BCYO/RSZ composite membrane was successfully fabricated by aerosol deposition (AD) at room temperature. The powders and composite membranes were characterized by high-temperature X-ray diffraction (HTXRD), particle size analysis (PSA), scanning electron microscopy (SEM), and X-ray elemental mapping (XRM). The hydrogen permeability of the dense BCYO/RSZ composite membrane was measured with the change of temperature. Under a pure hydrogen atmosphere at 773 K-1073 K, the BCYO/RSZ composite membrane exhibited higher permeability compared with the sole BCYO membrane over the entire investigated temperature range. |
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Keywords: | Ba cerate perovskite oxide Rapidly solidified Zr-based hydride Hydrogen separation Aerosol deposition Dense BCYO/RSZ alloy composite composite membrane |
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