US 12,674,106 B2Granted

Processes and systems for converting a hydrocarbon-containing feed

AssigneeExxonMobil Chemical Patents Inc.

InventorsMohsen N. Harandi, Michael F. Raterman, Paul F. Keusenkothen

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Abstract

Processes and systems for converting a hydrocarbon-containing feed. The feed and heated particles can be contacted within a pyrolysis zone to effect pyrolysis of at least a portion of the feed to produce a pyrolysis zone effluent and a first gaseous stream rich in olefins and a first particle stream rich in the particles can be obtained therefrom. At least a portion of the first particle stream, an oxidant, and steam can be fed into a gasification zone and contacted therein to effect gasification of at least a portion of coke disposed on the surface of the particles to produce a gasification zone effluent. A second gaseous stream rich in a synthesis gas and a second particle stream rich in heated and regenerated particles can be obtained from the gasification zone effluent. At least a portion of the second particle stream can be fed into the pyrolysis zone.

Claims23

Dependent claims

A process for converting a hydrocarbon-containing feed by pyrolysis and gasification, comprising:

(I) feeding the hydrocarbon-containing feed and heated particles into a pyrolysis zone;
(II) 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, and wherein a velocity of gaseous components within the pyrolysis zone is at least 20% greater than a velocity of the particles within the pyrolysis zone;
(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 a steam stream into a gasification zone;
(V) contacting the first particle stream, the oxidant stream, and the steam stream within the gasification zone to effect gasification of at least a portion of the coke disposed on the surface of the particles to produce a gasification zone effluent comprising heated and regenerated particles and a synthesis gas, wherein the synthesis gas comprises molecular hydrogen, carbon monoxide, and carbon dioxide;
(VI) obtaining from the gasification zone effluent a second gaseous stream rich in the synthesis gas and a second particle stream rich in the heated and 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);
(VIII) converting at least a portion of the carbon monoxide in the second gaseous stream and steam to carbon dioxide to produce a shifted synthesis gas stream;
and
(IX) obtaining from the shifted synthesis gas stream a carbon dioxide lean synthesis gas stream and a carbon dioxide rich stream.

7 more elements

A process for converting a hydrocarbon-containing feed by pyrolysis and gasification, comprising:

(I) feeding the hydrocarbon-containing feed and heated particles into a pyrolysis zone;
(II) 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, and wherein a velocity of gaseous components within the pyrolysis zone is at least 20% greater than a velocity of the particles within the pyrolysis zone;
(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 a steam stream into a gasification zone;
(V) contacting the first particle stream, the oxidant stream, and the steam stream within the gasification zone to effect gasification of at least a portion of the coke disposed on the surface of the particles to produce a gasification zone effluent comprising heated and regenerated particles and a synthesis gas, wherein the synthesis gas comprises molecular hydrogen, carbon monoxide, and carbon dioxide;
(VI) obtaining from the gasification zone effluent a second gaseous stream rich in the synthesis gas and a second particle stream rich in the heated and regenerated particles, wherein the second gaseous stream comprises 10 wt % to 25 wt % of molecular hydrogen, 15 wt % to 30 wt % of carbon monoxide, and at least 5 wt % of carbon dioxide, based on the total weight of the second gaseous stream;
and
(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).

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/778,202Filed 11 Nov 2020 · us provisional application
Priority: 11 Dec 2019
Published: US 2023/0016743 A119 Jan 2023
Granted: 7 Jul 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification47 codes

C10K 1/005
Of acid contaminants, e.g. acid gas removal: carbon dioxide
C01B 3/025
Production of hydrogen; Production of gaseous mixtures containing hydrogen: preparation or purification of gas mixtures for ammonia synthesis
C01C 1/0405
Preparation of ammonia by synthesis: from N2 and H2 in presence of a catalyst
C01C 1/0488
From N2 and H2 in presence of a catalyst: processes integrated with preparations of other compounds, e.g. methanol, urea or with processes for…