Ion Exclusion Chromatography: Liquid Chromatography

terials, operated in a pressure-driven mode, plotted as a function of inverse temperature. This Rgure is intended to give some appreciation of the Suxes that are attainable; however, they are not normalized to a given partial pressure gradient or thickness of membrane, and thus the Suxes are not directly comparable. Taking a value of between 10 and 100 L m 2 min 1 as the level of oxygen Sux needed for practical applications, it can be seen that the cobalt-containing single-phase materials give appreciable oxygen Suxes above about 9003C. It is interesting to note on this Rgure that the dual-phase material, fabricated from (Bi2O3)0.75 (Y2O3)0.25}Ag (35v/v), approaches the lower bound of the practical Suxes at temperatures of 8003C. It is not sensible to put data for electrical driven COGs on the same Rgure, given the restrictions mentioned above, however, some comparable Rgures are interesting. An equivalent Sux of 15.8 L m 2 min 1 is readily achievable with planar COG stack based on zirconia and operating at 10003C. Similar performance has been reported for a system based on a CGO-operating temperature of 8003C.