Patent ID: 8753427

Claim:
A method for processing a feed stream from a synthesis gas production process, comprising: separating in a first Pressure Swing Absorption (PSA) system a feed stream into a first fraction including substantially adsorbed components and a second fraction including substantially un-absorbed components, the first fraction including a majority of CH 4 and CO 2 from the feed stream, the second fraction including a majority of H 2 and CO from the feed stream; passing a first portion of the second fraction to a second PSA system; separating in the second PSA system the first portion of the second fraction into a third fraction including substantially adsorbed components and a fourth fraction including substantially un-absorbed components, the fourth fraction a majority of the H 2 in the first portion; and passing at least one of a second portion of the second fraction or the fourth fraction to form a stream recycled to a synthesis-gas conversion process including a majority of the H 2 and CO from the unconverted gas stream.