Solid multi-component membranes, electrochemical reactor components, electrochemical reactors and use of membranes, reactor components, and reactor for oxidation reactions

An electrochemical reactor cell for reacting an oxygen-consuming gas with an oxygen-containing gas in an environment containing either the oxygen-consuming gas or the oxygen-containing gas, comprising:

• a solid membrane having an entrance end, an exit end and a passage therebetween for the movement of one or more gases from the entrance end to the exit end wherein the solid membrane comprises a gas-impervious mixed metal oxide material of a perovskite structure having electron conductivity and oxygen ion conductivity, provided that the solid membrane contains less than 13 mol % bismuth, cerium or mixtures of bismuth and cerium.

An electrochemical reactor for reacting an oxygen-consuming gas with an oxygen-containing gas comprising:

• a shell having an entrance end, an exit end and a passage therebetween for the movement of one or more gases from the entrance end to the exit end, and
• an electrochemical reactor cell positioned within the shell having an entrance end, an exit end and a passage therebetween for the movement of one or more gases from the entrance end to the exit end, so that the shell and the reactor cell together form a first zone for introducing, reacting and expelling a first gas or gas mixture and the passage through the reactor cell forms a second zone within the electrochemical reactor for introducing, reacting and expelling a second gas or gas mixture,
• wherein the electrochemical reactor cell comprises a solid membrane comprising a gas-impervious mixed metal oxide material of a perovskite structure having electron conductivity and oxygen ion conductivity, provided that the solid membrane contains less than 13 mol % bismuth, cerium, or a mixture of bismuth and cerium.