Hydrogen Purification through a Highly Stable Dual?Phase Oxygen?Permeable Membrane

Using oxygen permeable membranes (OPMs) to upgrade low-purity hydrogen is a promising concept for high-purity H2 production. At high temperatures, water dissociates into and oxygen. The permeates through OPM oxidizes in waste stream on the other side of membrane. Pure can be obtained water-splitting after condensation. However, existing Co- Fe-based OPMs are chemically instable as result over-reduction Co Fe ions under reducing atmospheres. Herein, dual-phase membrane Ce0.9Pr0.1O2??-Pr0.1Sr0.9Mg0.1Ti0.9O3?? (CPO-PSM-Ti) with excellent chemical stability mixed ionic-electronic conductivity atmospheres was developed purification. An acceptable production rate 0.52 mL min?1 cm?2 achieved at 940 °C. No obvious degradation during 180 h operation indicates robust CPO-PSM-Ti proven give prospective advantages over upgrading hydrogen.