Patent ID: 8557218
Filing Date: 2013-10-15
Classification: B01D,C01B,Y02C,Y02P

Abstract:
1. A method for recovery of hydrogen and CO 2 in a refinery, comprising: dividing an input stream containing hydrogen, carbon dioxide, and a hydrocarbon into a first input portion and a second input portion, the input stream comprising an effluent from a reforming unit, the input stream exhibiting a hydrogen content of at least about 70 vol % and a CO combining the first input portion and a first tail gas stream, the combined first input portion and first tail gas stream exhibiting a CO separating the first input portion and a first tail gas stream to form a CO exposing the hydrogen enriched stream and the second input portion to an adsorbent in a cycling adsorber unit at a pressure of at least about 500 psig (about 3.4 MPag) to produce a hydrogen product stream having a hydrogen content of at least about 90 vol %, the hydrogen product stream containing at least about 85% of the hydrogen in the input stream; contacting the adsorbent with a first regeneration stream at a first pressure of about 45 psig (about 310 kPag) to about 130 psig (about 900 kPag) to form the first tail gas stream, the first tail gas stream containing a first combined content of CO plus CO contacting the adsorbent with a second regeneration stream at a second pressure of about 5 psig (about 35 kPag) to about 20 psig (about 140 kPag) to form a second tail gas stream, the second tail gas stream containing a second combined content of CO plus CO introducing the second tail gas stream as an input to the reforming unit.