Systems and processes for processing hydrogen and carbon monoxide
AssigneeGTLpetrol LLC
InventorRodney J. Allam
Life of this patent
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Abstract
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.
Claims20
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 third fraction including a majority of N2, CO, and CO2 and carbon dioxide included in the first portion, the fourth fraction a majority of the H2 in the first portion;
- 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;
- combining a portion of the first fraction and the third fraction to stream independent of recycling the combination to feed streams to the synthesis-gas production process or the synthesis-gas conversion process;
- and
- passing a second portion of the first fraction as feed gas to the synthesis-gas production process.
A system for processing hydro-carbons, comprising:
- a first Pressure Swing Absorption (PSA) system that separates 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;
- a second PSA system that receives a first portion of the second fraction and separates 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 third fraction including a majority of N2, CO, and CO2 included in the first portion, the fourth fraction a majority of the H2 in the first portion;
- a conversion process system receives syngas and 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;
- and
- an synthesis-gas production system that receives a second portion of the first fraction as feed gas to the synthesis-gas production process.
Dependencies are inferred from the claim text.