초록

A pressure swing adsorption process for the separation of hydrogen from a mixture of the same with methane, utilizing two separate PSA stages, one containing a nitrogen selective crystalline zeolite, and the second containing a methane selective adsorbent.

대표청구항 ▼

[What is claimed is:] [1.](a) passing a feed stream comprising said mixture to a PSA unit containing a nitrogen selective adsorbent so as to preferentially adsorb nitrogen and produce a product stream enriched with methane and a low pressure waste stream rich in nitrogen desorbed from said adsorbent

[What is claimed is:] [1.](a) passing a feed stream comprising said mixture to a PSA unit containing a nitrogen selective adsorbent so as to preferentially adsorb nitrogen and produce a product stream enriched with methane and a low pressure waste stream rich in nitrogen desorbed from said adsorbent;(b) recovering said product stream;(c) subsequent to production of said low pressure waste stream, periodically heating said nitrogen selective adsorbent to drive off accumulated methane therefrom; and(d) subsequent to step (c) cooling said nitrogen selective adsorbent.