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US 11,136,514 B2Granted
Process and apparatus for recycling hydrogen to hydroprocess biorenewable feed
AssigneeUop LLC
InventorAfrin Ahmed
Life of this patent
Estimating the term…
Abstract
The process and apparatus enables purification of a recycle hydrogen gas stream from hydroprocessing biorenewable feedstocks. The recycle gas stream is fed to a methanator reactor to hydrogenate carbon monoxide in the gas stream to water and methane. Other acid gases can be removed by scrubbing preferably upstream of the methanator. Removal of carbon monoxide omits the need for a hydrogen purge stream to avoid carbon monoxide accumulation and enables use of the hydrogen for a downstream hydroisomerization reaction.
Claims15
A hydroprocessing process comprising:
- providing a hydrocarbon feed stream comprising a biorenewable feedstock;
- hydroprocessing said hydrocarbon feed stream in a hydroprocessing reactor in the presence of a hydrogen stream to provide a hydroprocessed stream;
- stripping light gases from said hydroprocessed stream to provide a stripping overhead gaseous stream and a stripped liquid hydroprocessed stream;
- separating said stripping overhead gaseous stream to provide a net stripping overhead gaseous stream and a net hydroprocessed overhead liquid stream, wherein methane from the process is removed in said net stripping overhead gaseous stream;
- separating said net hydroprocessed overhead liquid stream to provide a liquid hydroprocessed stream and a gaseous stream comprising hydrogen and carbon monoxide;
- methanating said gaseous stream in a methanator reactor over a methanating catalyst to hydrogenate carbon monoxide to water and methane to provide a methanated gaseous stream;
- and
- providing said hydrogen stream from said methanated gaseous stream.
5 more elements
A hydroprocessing process comprising:
- providing a hydrocarbon feed stream comprising a biorenewable feedstock;
- hydroprocessing said hydrocarbon feed stream in the presence of a hydrogen stream in a hydroprocessing reactor to provide a hydroprocessed stream;
- stripping light gases from said hydroprocessed stream to provide a stripping overhead gaseous stream and a stripped liquid hydroprocessed stream;
- separating said stripping overhead gaseous stream to provide a net stripping overhead gaseous stream and a net hydroprocessed overhead liquid stream, wherein methane from the process is removed in said net stripping overhead gaseous stream;
- separating said net hydroprocessed overhead liquid stream to provide a liquid hydroprocessed stream and a gaseous stream comprising hydrogen and carbon monoxide;
- scrubbing acid gases from said gaseous stream to provide a scrubbed gaseous stream;
- compressing said scrubbed gaseous stream to provide a compressed, scrubbed gaseous stream;
- methanating said compressed, scrubbed gaseous stream over a methanating catalyst to hydrogenate carbon monoxide to water and methane to provide a methanated gaseous stream;
- and
- providing said hydrogen stream from said methanated gaseous stream.
7 more elements
Dependencies are inferred from the claim text.