Patent ID: 6296687
Filing Date: 2001-10-02
Classification: B01D,C01B,C01F,C01P,C04B,H01M,Y02E

Abstract:
A process for hydrogen separation from a hydrogen-containing gas comprising contacting a first side of a gas impermeable mixed hydrogen ion and electronic conducting membrane with said hydrogen containing gas at an elevated pressure concurrently with contacting a second opposite side of said membrane with gas at a lower pressure than said hydrogen containing gas and withdrawing hydrogen ions emerging from said second opposite side of said membrane, said mixed hydrogen ion and electronic conducting membrane comprising a perovskite oxide represented by the general formula:ABO.sub.3where A consists of at least one element selected from the group consisting of Ba, Ca, Mg and Sr and B is Ce.sub.1-x M.sub.x where M is a multivalent dopant metal selected from the group consisting of Eu and Tb and x has a value between 0.05 and 0.40.