Development of a H2-permeable Pd60Cu40-based composite membrane using a reverse build-up method |
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| Affiliation: | 1. Graduate Major in Nuclear Engineering, Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1-N1-22, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan;2. Sanno, Co., Ltd., 5-8-8, Tsunashima-Higashi, Kouhoku-ku, Yokohama, 223-0052, Japan;3. Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1-N1-29, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan;4. Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology, 2-12-1-N1-22, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan |
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| Abstract: | A new reverse build-up method is developed to fabricate an economical H2-permeable composite membrane. Sputtering and electroplating are used for the formation of a membrane comprised of a 3.7-μm-thick Pd60Cu40 (wt.%) alloy layer and a 13-μm-thick porous Ni support layer, respectively. The H2-permeation measurements are performed under the flow of a gaseous mixture of H2 and He at 300–320 °C and 50–100 kPa of H2 partial pressure. The H2/He selectivity values exceed 300. The activation energy at 300–320 °C is 10.9 kJ mol?1. The H2 permeability of the membrane is 1.25 × 10?8 mol m?1 s?1 Pa?0.5 at 320 °C after 448 h. The estimated Pd cost of the proposed membrane is approximately 1/8 of the cost for a pure Pd60Cu40 membrane. This study demonstrates that the proposed method allows the facile production of low-cost, Pd-based membranes for H2 separation. |
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| Keywords: | Hydrogen separation PdCu alloy Palladium composite membranes |
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