Abstract:

Coupling with the dense mixed conducting oxygenpermeation membrane, the cost of producing hydrogen using POM method can be reduced. However, since membrane is used in hightemperature applications under strong reductive atmosphere, ability of the oxygenpermeation and chemical stability is especially needed. Calculation on lattice parameters and the corresponding trials through O₂-TPD, CO₂-TG and oxygenpermeation experiments implies that Sr²⁺is substituted on A site by Ba²⁺, and doping Nb⁵⁺ on B site in perovskite lattice can effectively improve chemical stability of the perovskite membrane. 

Key words: oxygen permeation membrane reactor； perovskite； chemical stability