A mixed ionic and electronic conducting dual-phase oxygen permeable membrane with high CO2 tolerance

Abstract

Dual-phase membranes have been successfully developed using x wt% Ce_0.9La_0.1O_2−δ and 100 − x wt% La₂CuO_4+δ (xCLO-(100 − x)LCO) with no alkaline earth metals contained in the system. The 60CLO-40LCO dual-phase membrane exhibits the highest oxygen permeation rate of 0.25 mL min⁻¹ cm⁻² under He sweep gas conditions at 950 °C. Additionally, excellent CO₂ tolerance was obtained using this sample. Its stable oxygen permeability and outstanding CO₂ tolerance performance make the 60CLO-40LCO dual-phase membrane highly promising in the oxyfuel technologies for the CO₂ capture and sequestration application.