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AssigneeAir Products and Chemicals, Inc.
InventorsTimothy Christopher Golden, Alexander Schwarz, Thomas Hsiao-Ling Hsiung, Fred William Taylor
Estimating the term…
Carbon monoxide (CO) is removed from a nitrogen and CO containing gas stream such as feed air to an air separation process for recovery of a nitrogen product gas stream or a nitrogen product gas stream from an air separation process by adsorbing CO from said gas stream before or after separation of oxygen from said gas stream to produce a product gas stream containing less than 5 ppb of CO by contacting said gas stream With a solid adsorbent such as a Mn, Fe, Ni, Cu, Ag, Pd, Co, Pt or Au exchanged zeolite and periodically regenerating the adsorbent by desorption of CO therefrom under a flow of regenerating gas, and, if said gas stream is said feed air, separating oxygen therefrom to produce said nitrogen product.
A process for the substantial removal of carbon monoxide (CO) from a nitrogen and CO containing gas stream, containing up to 25 ppm of CO, selected from the group consisting of (1) feed air to an air separation process for the recovery of a nitrogen product gas stream and (2) a nitrogen product gas stream from an air separation process, comprising adsorbing CO from said gas stream by contacting said gas stream with a solid adsorbent consisting of a Mn, Fe, Ni, Ag or Co exchanged zeolite or a solid support impregnated with a Mn, Fe, Ni, Ag or Co salt and adsorbing hydrogen from said gas stream by contacting said gas stream with a metallic getter material, a hydrogen bronze or an Ag exchanged 3A zeolite before or after separation of oxygen from said gas stream to produce a product gas stream containing less than 5 ppb of CO and periodically regenerating the adsorbent by desorption of CO therefrom under a flow of regenerating gas, and, if said gas stream is said feed air, separating oxygen therefrom to produce a nitrogen product containg less than 5 ppb CO.
A process for the substantial removal of carbon monoxide (CO) and hydrogen from a nitrogen, CO and hydrogen containing gas stream, containing up to 25 ppm of CO, comprising adsorbing CO and hydrogen from said gas stream to produce a product gas stream containing less than 5 ppb of CO and less man 5 ppb of hydrogen by contacting said gas stream with a solid adsorbent comprising a Mn, Fe, Ni, Ag or Co exchanged zeolite having an Si/Al ratio of 5 or less and with a metallic getter material, a hydrogen bronze or an Ag exchanged 3A zeolite, and periodically regenerating the adsorbent by desorption of CO therefrom under a flow of regenerating gas.
A process for the substantial removal of carbon dioxide, water, carbon monoxide (CO) and hydrogen impurities from a feed air to an air separation process containing said impurities to recover a nitrogen product containing gas stream, comprising the steps of:
Dependencies are inferred from the claim text.