Mixed conducting membranes for syngas production

US6492290B1 · kind B1 · utility

Assignee

• AIR PRODUCTS AND CHEMICALS, INC. · US

Inventors

• Paul N. Dyer · Allentown, US
• Michael Francis Carolan · Allentown, US
• Darryl P. Butt · Gainesville, US
• Rene Van Doorn · Löwenstein, DE
• Raymond Ashton Cutler · Bountiful, US

Key dates

• Filing date: Aug 22, 2000
• Grant date: Dec 10, 2002
• Expiry date: Nov 17, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

This invention presents a new class of multicomponent metallic oxides which are particularly suited toward use in fabricating components used in processes for producing syngas. The non-stoichiometric, A-site rich compositions of the present invention are represented by the formula (LnxCa1−x)y FeO3−&dgr;wherein Ln is La or a mixture of lanthanides comprising La, and wherein 1.0>x>0.5, 1.1≧y>1.0 and &dgr; is a number which renders the composition of matter charge neutral. Solid-state membranes formed from these compositions provide a favorable balance of oxygen permeance and resistance to degradation when employed in processes for producing syngas. This invention also presents a process for making syngas which utilizes such membranes.