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US 12,590,257 B2Granted
Treatment of heavy pyrolysis products by partial oxidation gasification
AssigneeExxonMobil Product Solutions Company
InventorsWilliam Lewis Trapp, Daryl Bitting, David Eugene Slivensky, Xianchun Wu, Bruce Roger DeBruin
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Abstract
Methods and systems are provided for the conversion of waste plastics into various useful downstream recycle-content products. More particularly, the present system and method involves pyrolyzing one or more waste plastics into various pyrolysis products, including a carbon solids-containing pyrolysis residue, and then subjecting the pyrolysis residue to partial oxidation gasification to thereby form a syngas composition.
Claims15
A method for forming a recycled-content syngas, said method comprising:
- (a) pyrolyzing a pyrolysis feed in a pyrolysis unit, wherein said pyrolysis feed comprises at least one recycled waste plastic;
- (b) removing a pyrolysis bottoms stream from a first position in said pyrolysis unit and a pyrolysis gaseous stream from a second position in said pyrolysis unit, wherein said first position is at a lower elevation than said second position;
- (c) combining said pyrolysis bottoms stream with at least one solid recycled waste plastic to form a gasifier feedstock;
- and
- (de) feeding at least a portion of said pyrolysis bottoms stream into a partial oxidation (POX) gasifier.
2 more elements
Dependencies are inferred from the claim text.