| abstract |
This invention comprises an adsorption process for the removal of at least N 2 O from a feed gas stream that also contains nitrogen and possibly CO 2 and water. In the process the feed stream is passed over adsorbents to remove impurities such as CO2 and water, then over an additional adsorbent having a high N 2 O/N 2 separation factor. In a preferred mode the invention is an air prepurification process for the removal of impurities from air prior to cryogenic separation of air. An apparatus for operating the process is also disclosed. |