Characterization of Pd<sub>60</sub>Cu<sub>40</sub> Composite Membrane Prepared by a Reverse Build-Up Method for Hydrogen Purification
Yasunari Shinoda,
Masakazu Takeuchi,
Hikaru Mizukami,
Norikazu Dezawa,
Yasuhiro Komo,
Takuya Harada,
Hiroki Takasu,
Yukitaka Kato
Affiliations
Yasunari Shinoda
Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1, Ōokayama, Meguro-ku, Tokyo 152-8550, Japan
Masakazu Takeuchi
Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1, Ōokayama, Meguro-ku, Tokyo 152-8550, Japan
Hikaru Mizukami
Department of Transdisciplinary Science and Engineering, School of Environment and Society, Tokyo Institute of Technology, 2-12-1, Ōokayama, Meguro-ku, Tokyo 152-8550, Japan
Norikazu Dezawa
Sanno Co., Ltd., 5-8-8, Tsunashima-Higashi, Kouhoku-ku, Yokohama 223-0052, Japan
Yasuhiro Komo
Sanno Co., Ltd., 5-8-8, Tsunashima-Higashi, Kouhoku-ku, Yokohama 223-0052, Japan
Takuya Harada
Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1, Ōokayama, Meguro-ku, Tokyo 152-8550, Japan
Hiroki Takasu
Laboratory for Zero-Carbon Energy, Institute of Innovative Research, Tokyo Institute of Technology (Tokyo Tech), 2-12-1, Ōokayama, Meguro-ku, Tokyo 152-8550, Japan
Yukitaka Kato
Laboratory for Zero-Carbon Energy, Institute of Innovative Research, Tokyo Institute of Technology (Tokyo Tech), 2-12-1, Ōokayama, Meguro-ku, Tokyo 152-8550, Japan
A thin Pd-based H2-permeable membrane is required to produce high-purity H2 with high efficiency. In this study, a porous Ni-supported Pd60Cu40 composite H2-permeable membrane was developed using a reverse build-up method to produce economical H2 purification. The thickness of the Pd60Cu40 alloy layer produced by the improved membrane production process reached 1.0 μm; it was thinner than the layer obtained in a previous study (3.7 μm). The membrane was characterized by scanning electron microscope, inductively coupled plasma optical emission spectrometer, H2 permeation test, and Auger microprobe analysis. The permeation tests were performed at 300–320 °C and 50–100 kPa with H2 introduced from the primary side. The H2 permeation flux was stable up to ~320 °C. The n-value was determined to be 1.0. The H2 permeance of the membrane was 2.70 × 10−6 mol m−2 s−1 Pa−1.0 at 320 °C, after 30 h, similar to those of other 2.2-µm-thick and 3.7-µm-thick Pd60Cu40 composite membranes, suggesting that the adsorption and dissociation reaction processes on the PdCu alloy surface were rate-limiting. The Pd cost of the membrane was estimated to be ~1/30 of the Pd cost of the pure Pd60Cu40 membrane.
