4.3 Carbon dioxide permeation membrane for hydrocarbon reforming

Carbon dioxide permeation membrane includes mixed e/CO3 <sup>2</sup> conducting membrane, O<sup>2</sup>/CO3 <sup>2</sup> conducting membrane, OH/CO3 <sup>2</sup> conducting membrane (hydroxide/ceramic dual-phase membrane), etc. [69, 70]. The combination between carbon dioxide permeation membrane and solar energy is very limited now. The combination of hydrogen permeation membrane and carbon dioxide permeation membrane has been proposed for methane steam reforming by way of an alternate H2 and CO2 separation driven by solar energy [71]. The carbon dioxide permeation membrane has great potential to be utilized for the hydrocarbon reforming or decomposition for CO2 separation and capture in the future.
