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US 11,958,745 B1Granted
Use of methane pyrolysis to decarbonize a hydrocarbon cracking system
AssigneeChevron Phillips Chemical Company LP
InventorsJames Hillier, Michael S. Webster-Gardiner
Life of this patent
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Abstract
Processes and systems that utilize methane pyrolysis for carbon capture from a petrochemical stream that contains hydrogen and methane. The petrochemical stream can be the tail gas of a hydrocarbon cracking system, or any other petrochemical stream containing hydrogen and methane. The petrochemical stream can be separated into a hydrogen product stream and a methane product stream, before sending the methane product stream to a methane pyrolysis unit. The methane pyrolysis unit converts methane to solid carbon and hydrogen.
Claims10
A process comprising:
- cracking a hydrocarbon in a hydrocarbon cracking system to produce a first cracking product stream;
- separating the first cracking product stream into a second cracking product stream and a hydrogen-rich methane stream;
- introducing the hydrogen-rich methane stream or a methane product stream to a methane pyrolysis unit;
- converting, in the methane pyrolysis unit, methane received from the hydrogen-rich methane stream or from the methane product stream to hydrogen and solid carbon;
- flowing hydrogen from the methane pyrolysis unit in a first hydrogen product stream;
- and
- introducing at least a portion of the first hydrogen product stream into a furnace of the hydrocarbon cracking system;
- wherein the hydrocarbon is cracked in the hydrocarbon cracking system by combusting the at least a portion of the first hydrogen product stream in the furnace of the hydrocarbon cracking system.
5 more elements
Dependencies are inferred from the claim text.