초록 ▼

An ionic conductor has been developed which exhibits both hydrogen ion conductivity and electronic conductivity. The conductor is a perovskite-type oxide represented by the general formula: ABO.sub.3 where A consists of at least one element selected from the group consisting of Ba, Ca, Mg and Sr and

An ionic conductor has been developed which exhibits both hydrogen ion conductivity and electronic conductivity. The conductor is a perovskite-type oxide represented by the general formula: ABO.sub.3 where 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, preferably Eu or Tb, and x is greater than 0 and less than 1. It is particularly useful in processes in which hydrogen is separated from a hydrogen-containing gas, e.g. in conversion of natural gas, operation of hydrogen fuel cells, etc.

대표청구항 ▼

[ What is claimed is:] [1.]1. 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

[ What is claimed is:] [1.]1. 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: re 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.