초록 ▼

Carbon dioxide, water, nitrous oxide and optionally ethylene are removed from a feed air stream by a temperature swing adsorption using a first adsorbent such as alumina to adsorb water, a second adsorbent such as 13X zeolite to adsorb carbon dioxide, and a third adsorbent such as binderless calcium

Carbon dioxide, water, nitrous oxide and optionally ethylene are removed from a feed air stream by a temperature swing adsorption using a first adsorbent such as alumina to adsorb water, a second adsorbent such as 13X zeolite to adsorb carbon dioxide, and a third adsorbent such as binderless calcium exchanged X zeolite to adsorb nitrous oxide and optionally ethylene, prior to cryogenic separation of the purified air stream.

대표청구항 ▼

[ What is claimed is:] [1.] A process for removing water, carbon dioxide and nitrous oxide from a feed air stream prior to cryogenic distillation of the air stream to separate a nitrogen rich stream and/or an oxygen rich stream, comprising passing said feed air stream containing water, carbon dioxid

[ What is claimed is:] [1.] A process for removing water, carbon dioxide and nitrous oxide from a feed air stream prior to cryogenic distillation of the air stream to separate a nitrogen rich stream and/or an oxygen rich stream, comprising passing said feed air stream containing water, carbon dioxide and nitrous oxide through a first adsorbent to adsorb said water, through a second adsorbent which optionally may be the same as the first adsorbent to remove carbon dioxide and through a third adsorbent to remove said nitrous oxide from said air stream wherein said third adsorbent has a Henry's Law selectivity for nitrous oxide compared to carbon dioxide of 0.49 or more at 30.degree. C.