Patent ID: 6824590
Filing Date: 2004-11-30
Classification: B01D,B01J,Y02C,Y10S

Abstract:
A process for separating a feed gas into at least one product gas, said process comprising:providing a gas separation apparatus comprising at least one adsorption layer comprising a lithium-exchanged FAU adsorbent having water desorption characteristics, defined by drying curves, similar to those for the corresponding fully sodium-exchanged FAU, and having a heat of adsorption for carbon dioxide equal to or lower than that for the corresponding fully sodium-exchanged FAU at high loadings of carbon dioxide, wherein said lithium-exchanged FAU adsorbent contains less than 0.01% calcium and less than 0.01% magnesium; feeding into said gas separation apparatus said feed gas comprising nitrogen, oxygen, and at least one of carbon dioxide and water; adsorbing water and/or carbon dioxide onto said at least one adsorption layer; and collecting from said gas separation apparatus said at least one product gas comprising oxygen.