Patent ID: 8636827
Filing Date: 2014-01-28
Classification: B01D,B01J,C01B,Y10T

Abstract:
1. A method of operating a mixed ionic-electronic conducting ceramic membrane having an oxidizing side and a reducing side, said method comprising a start-up phase and a production phase, for producing a gas stream, characterized in that the start-up phase comprises, in succession: a) a step of introducing, on the oxidizing side and the reducing side of the membrane respectively, first and second gas mixtures chosen from the following pairs: air/N2; air/Ar; air/He; Ar/N2; Ar/He; N2/He; N2/N2; Ar/Ar; He/He; (air+x % O2)/Ar with 0<x<100%; and (air+x % O2)/N2 with 0<x<100%; b) a step of heating the membrane to a temperature T0, enabling the O2− ions to diffuse into the membrane; c) a step of enriching the oxidizing side with oxygen in order to achieve the oxygen content used during the production phase; and d) a step of establishing an oxygen stream through the membrane wherein the ceramic membrane comprises a composite comprising: