초록 ▼

The present invention describes a pressure swing adsorption (PSA) apparatus and process for the production of purified hydrogen from a feed gas stream containing heavy hydrocarbons (i.e., hydrocarbons having at least six carbons). The apparatus comprises at least one bed containing at least three la

The present invention describes a pressure swing adsorption (PSA) apparatus and process for the production of purified hydrogen from a feed gas stream containing heavy hydrocarbons (i.e., hydrocarbons having at least six carbons). The apparatus comprises at least one bed containing at least three layers. The layered adsorption zone contains a feed end with a low surface area adsorbent (20 to 400 m2/g) which comprises 2 to 20% of the total bed length followed by a layer of an intermediate surface area adsorbent (425 to 800 m2/g) which comprises 25 to 40 % of the total bed length and a final layer of high surface area adsorbent (825 to 2000 m2/g) which comprises 40 to 78% of the total bed length.

대표청구항 ▼

1. A process for providing purified hydrogen comprisingfeeding into a feed end of a pressure swing adsorption apparatus a feed gas mixture containing hydrogen, methane, and heavy hydrocarbons having at least six carbons; and recovering from a product end of said apparatus a product gas containing at

1. A process for providing purified hydrogen comprisingfeeding into a feed end of a pressure swing adsorption apparatus a feed gas mixture containing hydrogen, methane, and heavy hydrocarbons having at least six carbons; and recovering from a product end of said apparatus a product gas containing at least 95% hydrogen, wherein said apparatus comprising at least one bed containing at least three layers; a feed-end layer containing a feed-end adsorbent having a first surface area sufficiently small to separate a heavy hydrocarbon having at least six carbons from a light hydrocarbon having less than six carbons, wherein said first surface area is too small to substantially separate methane from hydrogen; a product-end layer containing a product-end adsorbent having a second surface area sufficiently large to separate methane from hydrogen; and an intermediate layer containing an intermediate adsorbent having an intermediate surface area intermediate to said first surface area and said second surface area.