Solid electrolyte membrane systems for producing controlled purity oxygen

摘要

A process for separating a feed gas stream (8) containing elemental oxygen and at least one other gas into an oxygen product gas stream having a selected concentration of oxygen (30), said process comprising removing the oxygen from a feed gas stream (8) using an ion transport module (16) containing an ion transport membrane (17) having a retentate side (17a) and a permeate side (17b) to produce both an ultrapure oxygen gas stream (26) emerging from the membrane into the permeate side and a retentate gas stream (20) and blending the ultrapure oxygen gas stream (26) with an additive gas stream to produce an oxygen product gas stream having a selected concentration of oxygen. <IMAGE>