Characterization of Pd60Cu40 Composite Membrane Prepared by a Reverse Build-Up Method for Hydrogen Purification

Energies

Masakazu Takeuchi¹  Takuya Harada¹  Yasunari Shinoda¹  Hikaru Mizukami²  Hiroki Takasu³  Yukitaka Kato³  Yasuhiro Komo⁴  Norikazu Dezawa⁴ 

[1] 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;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;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;Sanno Co., Ltd., 5-8-8, Tsunashima-Higashi, Kouhoku-ku, Yokohama 223-0052, Japan;

关键词: hydrogen energy;    hydrogen purification;    membrane separation;    palladium;    Pd-alloy;   

DOI  :  10.3390/en14248262

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown