Patent ID: 8361198

Claim:
A process for the separation of foreign gases from a reducing useful gas by pressure swing adsorption, in which: a suitable process yields a reducing useful gas which contains a foreign component to be absorbed or a foreign gas in addition to the reducing component, and this gas is supplied to a pressure swing adsorption unit at elevated pressure to separate adsorbable gases, which retains the gas to be absorbed in an adsorptive process and thus produces a purified useful gas, and the adsorbed gases are released again in a mixture with useful gas by depressurizing the pressure swing adsorption unit and can be further processed or removed, after depressurization a vacuum is applied to the pressure swing adsorption unit for desorption by means of an ejector, by which the remaining adsorbed gases are withdrawn from the pressure swing adsorption unit, wherein the ejector is operated by steam generated by heating with the hot useful gas or with the flue gases from a heating process for the production of useful gas.