Mixed conducting ceramic membranes for high efficiency power generation with CO2 capture

Because of the emission of larger amount of CO2, power generation from fossil fuel has resulted in serious environmental problems. Integrating dense mixed-conducting membranes (MCMs) into power cycles with CO2 capture has been considered as the most advanced technology for high efficiency and clean power production. This paper presents an update of MCMs development efforts, including the recent progress in membrane materials and their chemical resistance; the membrane architecture especially the tubular asymmetric membranes and hollow fiber membranes; and the pilot-scale planar and membrane modules. The oxyfuel technique using MCMs for oxygen production and its commercial prospects are discussed. Finally, current challenges related to the industrialization of MCMs are addressed and possible future research is also outlined.

► Mixed-conducting membrane materials with high permeability and structural stability for oxygen or hydrogen separation have been developed.
► The technology and process to fabricate ceramic membranes with desired geometry configurations are available.
► Commercial-scale planar ceramic membrane modules with the oxygen production rate of tonnage-quantity per day have been established and the further scale up technology is available.
► The pilot plant of ceramic membrane-based oxyfuel process for zero emission power generation has been constructed.
► Mixed-conducting membranes have shown new opportunities in high efficiency power generation with CO2 capture.