System to convert coke in fluid catalytic cracking process by utilizing metal oxides with in-situ CO2 capture

Patent metadata

Field	Value
Publication number	US-12311347-B2
Application number	US-202117207946-A
Country	US
Kind code	B2
Filing date	Mar 22, 2021
Priority date	Mar 22, 2021
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

This disclosure relates to methods for reducing CO 2 emissions from a fluid catalytic cracking process by providing a chemical looping system comprising a regenerator and reducer reactor, an oxidizer reactor, and a combustor reactor, and by sequestering the carbon dioxide of a CO 2 and H 2 O stream. Also, this disclosure relates to methods for reducing CO 2 emissions from a fluid catalytic cracking process by partially oxidizing catalyst coke particles in a fluid catalytic cracking regenerator reactor to produce synthesis gas, and by providing a chemical looping system comprising a reducer reactor, an oxidizer reactor, and a combustor reactor.

First claim

The invention claimed is:

1. A method for reducing CO 2 emissions from a fluid catalytic cracking process by
a) providing a chemical looping system comprising a regenerator and reducer reactor, an oxidizer reactor and a combustor reactor;
i) feeding catalyst coke particles and metal oxide particles into the regenerator and reducer reactor of the chemical looping system to produce a plurality of streams comprising a regenerated catalyst stream, a CO 2 and H 2 O stream and a reduced metal oxide particle stream;
ii) feeding the stream of reduced metal oxide particles and a stream of water vapor into the oxidizer reactor of the chemical looping system to produce a plurality of streams comprising a hydrogen stream and a stream of oxidized metal oxide particles; and
iii) feeding the stream of oxidized metal oxide particles and a stream of air into the combustor reactor of the chemical looping system to produce heat and a stream of metal oxide particles; and

b) sequestering the carbon dioxide of the CO 2 and H 2 O stream of step (a)(i) to reduce the CO 2 emissions from the regenerator and reducer reactor.

2. The method of claim 1 , wherein a portion of the CO 2 and H 2 O stream of step (a)(i) is fed back into the regenerator and reducer reactor of step (a).

3. The method of claim 1 , wherein the regenerator and reducer reactor is a counter-current moving fluidized bed reactor.

4. The method of claim 3 , wherein the reduced metal oxide particle stream leaves from the bottom of the counter-current moving fluidized bed reactor.

5. The method of claim 3 , wherein the regenerated catalyst stream leaves from the top of the counter-current moving fluidized bed reactor.

6. The method of claim 1 , wherein the regenerated catalyst stream and the reduced metal oxide particle stream of step (a)(i) are physically separated.

7. The method of claim 6 , wherein the regenerated catalyst stream and the reduced metal oxide particle stream of step (a)(i) are physically separated by a physical sieve.

8. The method of claim 1 , wherein the feed of step (a)(i) comprises a make-up feed.

9. The method of claim 8 , wherein the make-up feed comprises methane.

10. The method of claim 1 , wherein the metal oxide particles are selected from the group consisting of copper oxide, nickel oxide, magnesium oxide, iron oxide, manganese oxide and mixtures thereof.

11. The method of claim 10 , wherein the metal oxide particles comprise iron oxide.

12. The method of claim 11 , wherein the iron oxide is Fe 2 O 3 .

13. The method of claim 1 , wherein the reduced metal oxide particles comprise iron and iron oxide particles.

14. The method of claim 13 , wherein the iron oxide is FeO.

15. The method of claim 1 , wherein the oxidized metal oxide particles comprise Fe 3 O 4 .

16. The method of claim 1 , wherein the CO 2 and H 2 O stream comprises greater that 95 vol % carbon dioxide.

17. The method of claim 1 , wherein the catalyst coke particles are fed into a single stage reactor.

Assignees

• Exxonmobil Technology & Engineering Company

Inventors

• Kim Hyung Rae
• Sharma Arun K
• Du Bing

Classifications

• C01B3/061

  by reaction of water with metal oxides · CPC title

• C01B2203/86

  Carbon dioxide sequestration · CPC title

• C01B3/063

  Cyclic methods · CPC title

• B01J38/30 Primary

  in gaseous suspension, e.g. fluidised bed · CPC title

• B01J38/26

  having mainly counter-current flow of oxygen-containing gas and material · CPC title