Systems and processes for processing hydrogen and carbon monoxide

摘要

In various implementations, various feed gas streams which include hydrogen and carbon monoxide may be processed for conversion to product streams. For example, the feed gas stream may be processed using the Fischer-Tropsch process or a methanol synthesis process. Unconverted hydrogen and carbon monoxide can be recycled at high recovery and/or inert components removed to prevent build-up in the recycle system by using an arrangement of pressure swing adsorption systems designed to recover impure product gas streams.

主权项

1. 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 CH4 and CO2 from the feed stream, the second fraction including a majority of H2 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 H2 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 H2 and CO from the unconverted gas stream.