Carbon neutral conversion of residue
AssigneeSaudi Arabian Oil Company
InventorsChun Han, Salahdine Idrissi
Life of this patent
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Abstract
A petroleum residue stream is heated and reacted with an oxygen stream and a carbon dioxide stream in a gasification unit to produce syngas. At least a portion of the carbon monoxide is converted into carbon dioxide to produce shifted syngas. At least a portion of the shifted syngas is separated to produce a syngas feed stream. At least a portion of the syngas feed stream is converted into methanol. At least a portion of the methanol is converted into one or more alkenes (olefins). At least a portion of the methanol is reacted with carbon monoxide to produce acetic acid. Carbon dioxide produced in the process can be recycled to the gasification unit to facilitate the production of the syngas.
Claims12
A method comprising:
- heating and reacting a petroleum residue stream with an oxygen stream and a carbon dioxide stream in a gasification unit to produce a syngas stream comprising carbon dioxide, carbon monoxide, and hydrogen;
- converting at least a portion of the carbon monoxide of the syngas stream into carbon dioxide to produce a shifted syngas stream;
- separating at least a portion of the shifted syngas stream to produce a syngas feed stream, wherein separating at least the portion of the shifted syngas stream comprises:
- separating at least a portion of carbon dioxide from the shifted syngas stream to produce a recycle carbon dioxide stream;
- and
- separating at least a portion of carbon monoxide from the shifted syngas stream to produce a carbon monoxide stream;
- converting at least a portion of the syngas feed stream into methanol to produce a methanol stream;
- converting at least a first portion of the methanol stream into one or more alkenes to produce an olefins stream;
- reacting at least a second portion of the methanol stream with at least a portion of the carbon monoxide stream to produce acetic acid;
- and
- recycling at least a portion of the recycle carbon dioxide stream to the gasification unit to facilitate the production of the syngas stream.
Dependencies are inferred from the claim text.