Processes and Systems for Upgrading a Hydrocarbon-Containing Feed
OwnerMohsen N. Harandi, Paul F. Keusenkothen +1inventors
InventorsMohsen N. Harandi, Paul F. Keusenkothen, Ying Liu
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Abstract
Processes for converting a hydrocarbon-containing feed by pyrolysis and gasification/combustion. The hydrocarbon-containing feed and heated particles can be fed into a pyrolysis zone and contacted therein to effect pyrolysis of the hydrocarbons and produce a pyrolysis effluent. A gaseous stream rich in olefins and a particle stream rich in particles that include coke disposed thereon can be obtained from the pyrolysis effluent. A CO2-rich stream that includes, on a dry basis, CO2 at a concentration ≥90 vol %, based on the total volume of the CO2-rich stream, can be obtained from the gasification/combustion gas mixture.
Claims18
A process for converting a hydrocarbon-containing feed by pyrolysis, the process comprising:
- (I) feeding the hydrocarbon-containing feed and heated particles into a pyrolysis zone;
- (H) contacting the hydrocarbon-containing feed with the heated particles in the pyrolysis zone to effect pyrolysis of at least a portion of the hydrocarbon-containing feed to produce a pyrolysis zone effluent comprising olefins and the particles, wherein coke is formed on the surface of the particles;
- (III) obtaining from the pyrolysis zone effluent a first gaseous stream rich in the olefins and a first particle stream rich in the particles;
- (IV) feeding at least a portion of the first particle stream, an oxidant stream, and an optional steam stream into a gasification/combustion zone, wherein the oxidant stream comprises molecular oxygen;
- (V) contacting the first particle stream, the oxidant stream, and the optional steam stream within the gasification/combustion zone to effect gasification/combustion of at least a portion of the coke disposed on the surface of the particles to produce a gasification/combustion zone effluent comprising regenerated particles and a gasification/combustion gas mixture comprising CO and/or CO2;
- (VI) obtaining from the gasification/combustion zone effluent a second gaseous stream rich in the gasification/combustion gas mixture and a second particle stream rich in the regenerated particles;
- (VII) feeding at least a portion of the second particle stream into the pyrolysis zone as at least a portion of the heated particles fed into the pyrolysis zone in step (I);
- and
- (VIII) obtaining a CO2-rich stream from the gasification/combustion gas mixture, wherein the CO2-rich stream, on a dry basis, comprises CO2 at a concentration of ≥90 vol %, based on the total volume of the CO2-rich stream.
The process 2, wherein step (IV) further comprises feeding a diluent stream into the gasification zone, and wherein the diluent stream comprises a portion of the second gaseous stream obtained in step (VI).
Dependencies are inferred from the claim text.