Method of making sulfur-resistant composite metal membranes
US8101243B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2007 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Aug 8, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention provides thin, hydrogen-permeable, sulfur-resistant membranes formed from palladium or palladium-alloy coatings on porous, ceramic or metal supports. Also disclosed are methods of making these membranes via sequential electroless plating techniques, wherein the method of making the membrane includes decomposing any organic ligands present on the substrate, reducing the palladium crystallites on the substrate to reduced palladium crystallites, depositing a film of palladium metal on the substrate and then depositing a second, gold film on the palladium film. These two metal films are then annealed at a temperature between about 200° C. and about 1200° C. to form a sulfur-resistant, composite PdAu alloy membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.