Oxygen-permeable membrane and method for the production thereof

US8486184B2 · kind B2 · utility

Assignee

• Forschungszentrum Jülich GmbH · DE

Inventors

• Stefan Baumann · Altenriet, DE
• Jose Manuel Serra Alfaro · València, ES
• Wilhelm Albert Meulenberg · Vaals, NL
• Hans Peter Buchkremer · Heinsberg, DE
• Detlev Stoever · Niederzier, DE

Key dates

• Filing date: Feb 21, 2009
• Grant date: Jul 16, 2013
• Expiry date: Jan 15, 2030

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2325/24
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A composite membrane for selective gas separation, comprises a layer system having a continuously porous, mechanically stable carrier layer, which has an average pore size in the μm range, further having at least one continuously porous intermediate layer, which is disposed on the carrier layer and has an average pore size in the range of 2 to 200 nm, and further having a gastight functional layer, which is disposed on the intermediate layer and is made of a mixed-conductive material having a maximum layer thickness of 1 μm. The carrier layer comprises a structural ceramic, a metal, or a cermet and has a layer thickness of no more than 1 mm. The intermediate layer is present with a total layer thickness of no more than 100 μm and has an average pore size in the range of 10 to 100 nm. The functional layer comprises a perovskite, a fluorite, or a material having a K2NiF4 structure, such as La1-xSrxCo1-yFeyO3-8 (LSCF). The layer thickness of the functional layer is no more than 50 nm, and particularly between 25 and 400 nm. In order to produce this composite membrane, at least one porous intermediate layer is applied onto a continuously porous, mechanically stable carrier layer, which…