Process for the adsorption of nitrogen from gas mixtures by means of pressure swing adsorption with zeolites

摘要

In the pressure swing adsorption of nitrogen from gas mixtures with less polar gas components at temperatures of between 20 DEG and 50 DEG C., wherein the gas mixture is passed through an adsorber which is filled with packings of zeolite pellets and has an inlet zone and an outlet zone, the improvement which comprises providing at least two packings in the adsorber, a packing of Li-zeolite X in the inlet zone of the adsorber and a packing of at least one of Ca-zeolite A and Ca-zeolite X in the outlet zone of the adsorber.