초록

The present invention provides for a multi-composite adsorbent mixture which will remove H2O, CO2 and nitrogen oxides and/or hydrocarbons from a feed gas stream. The improvement lies in the use of a third adsorbent which is selective for nitrogen oxides, hydrocarbons or both.

대표청구항 ▼

1. A pressure swing adsorption process for the removal of contaminants from a feed gas stream by contacting said feed gas stream with a multi-composite adsorbent comprising a mixture of a first zeolite selected from the group consisting of zeolite types X and Y; and activated alumina, the improvemen

1. A pressure swing adsorption process for the removal of contaminants from a feed gas stream by contacting said feed gas stream with a multi-composite adsorbent comprising a mixture of a first zeolite selected from the group consisting of zeolite types X and Y; and activated alumina, the improvement consisting of including in said mixture a second zeolite which is different from said first zeolite and is not a type X or Y zeolite.