NITROGEN ADSORPTION WITH HIGHLY LI EXCHANGED X-ZEOLITES WITH LOW SI/AL RATIO

Low silica X(LSX) zeolites having a framework SI/AL ratio equal to 1.0 with lithium exchange level greater than a threshold level 70% exhibit unexpectededly higher capacity for nitrogen adsorption compared to LSX-zeolite with lower lithium exchange levels.These material provide high performance adsorbents for psa air sepration process at a lower cost for the adsorbent because of the lower threshold lithium exchange levels compared to highly exchanged lithium X-zeolite .