Title:
HYDROGEN PERMEABLE MEMBRANE FORMED OF PdCu ALLOY, AND HYDROGEN PURIFICATION METHOD BY MEANS OF HYDROGEN PERMEABLE MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2023/037851
Kind Code:
A1
Abstract:
The present invention relates to a hydrogen permeable membrane which is formed of a PdCu alloy and is applicable to hydrogen purification. This hydrogen permeable membrane is characterized in that: the PdCu alloy contains 38.75% by mass to 39.5% by mass of Cu, with the balance being made up of Pd and unavoidable impurities; and the area ratio of the β phase in an arbitrary cross-section is 95% or more. A hydrogen permeable membrane according to the present invention has a hydrogen permeability coefficient φ of 2.0 × 10-8 mol/m∙S∙Pa1/2 or more at a temperature within the range of 150°C to 350°C. Since this hydrogen permeability coefficient is higher than that of a PdCu alloy film containing 40% by mass of Cu, the PdCu alloy film having been considered to be optimal before now, it is shown that the hydrogen permeable membrane according to the present invention has excellent hydrogen permeability.
Inventors:
HORIKAWA DAISUKE (JP)
MATSUMURA TORU (JP)
EBISUGI MASATO (JP)
KUBOTA SHUICHI (JP)
MATSUMURA TORU (JP)
EBISUGI MASATO (JP)
KUBOTA SHUICHI (JP)
Application Number:
PCT/JP2022/031476
Publication Date:
March 16, 2023
Filing Date:
August 22, 2022
Export Citation:
Assignee:
TANAKA PRECIOUS METAL IND (JP)
International Classes:
C22C5/04; B01D53/22; B01D69/02; B01D69/10; B01D69/12; B01D71/02; C01B3/56; C22F1/00; C22F1/14; H01M8/0612; H01M8/0662
Foreign References:
| JP2015053475A | 2015-03-19 | |||
| JP2014198883A | 2014-10-23 | |||
| JP2013209729A | 2013-10-10 | |||
| JP2010070818A | 2010-04-02 | |||
| JP2001262252A | 2001-09-26 | |||
| JP2008012495A | 2008-01-24 |
Other References:
ZHAO CHENYANG; GOLDBACH ANDREAS; XU HENGYONG: "Low-temperature stability of body-centered cubic PdCu membranes", JOURNAL OF MEMBRANE SCIENCE, ELSEVIER BV, NL, vol. 542, 27 July 2017 (2017-07-27), NL , pages 60 - 67, XP085189488, ISSN: 0376-7388, DOI: 10.1016/j.memsci.2017.07.049
JAMES RAPHAEL WARREN: "The Effect of Hydrogen on Palladium-Copper Based Membranes for Hydrogen Purification", THE UNIVERSITY OF BIRMINGHAM, pages: 22 - 29,37-80
JAMES RAPHAEL WARREN: "The Effect of Hydrogen on Palladium-Copper Based Membranes for Hydrogen Purification", THE UNIVERSITY OF BIRMINGHAM, pages: 22 - 29,37-80
Attorney, Agent or Firm:
TANAKA AND OKAZAKI (JP)
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