Oxygen separation from air using zirconia solid electrolyte membranes

The development of alternate sources of oxygen other than from air liquefaction has been identified as a significant research need for the continued development of coal gasification. Air separation using a zirconia solid electrolyte membrane is one possible alternate source of oxygen. The objective of this multiyear effort is the development, fabrication, and testing of a zirconia oxygen production module capable of delivering approximately 100 liters/min of oxygen. The operation of the zirconia oxygen separator is similar to the high temperature solid electrolyte fuel cells. The different requirements for the two systems are substantial, requiring developmental work on the oxygen separator. The oxygen separation capability of the zirconia membrane is derived from its ability to function as an electrodialysis membrane and selectively remove oxygen from gas mixtures containing oxygen. The effort thus far has consisted of a systems analysis, economic assessment, basic research including materials development and small cell testing, and improvement of the manufacture of cell components. The ultimate project goal is the operation of a 100 liter/min oxygen production unit