Integrated heavy liquid fuel coking with chemical looping concept

Patent metadata

Field	Value
Publication number	US-10125323-B2
Application number	US-201715650432-A
Country	US
Kind code	B2
Filing date	Jul 14, 2017
Priority date	Oct 9, 2014
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

A system integrating heavy fuel coking and chemical looping combustion is provided. The system includes a source of heavy fuel, a cracking reactor into which the fuel and metal oxides are introduced, a fuel reactor in fluid communication with the cracking reactor, and an air reactor in fluid communication with the fuel reactor. In the cracking reactor, the fuel undergoes a cracking reaction forming products and petcoke deposits on the metal oxides. The fuel reactor is configured to gasify metal oxides with petcoke deposits to produce syngas and reduce the metal oxides. The system transports a first portion of the reduced metal oxides to the cracking reactor and a second portion to the fuel reactor. The air reactor is configured to receive reduced metal oxides from the fuel reactor and oxidize them. The system is further configured to transport the oxidized metal oxides to the fuel reactor.

First claim

What is claimed is:

1. A system that integrates heavy fuel coking and chemical looping combustion comprising:
a source of heavy liquid fuel;
a cracking reactor in fluid communication with the source of heavy liquid fuel via a channel and into which the heavy liquid fuel and metal oxides are introduced, and the heavy liquid fuel undergoes a cracking reaction to form petroleum-based products and petcoke particles are deposited on the metal oxides;
a fuel reactor that is in fluid communication with the cracking reactor and receives the metal oxides with petcoke deposited thereon through a first conduit, the fuel reactor being configured for gasifying the metal oxides with petcoke deposits thereon with steam that is introduced into the fuel reactor resulting in the production of syngas, unburned gases, and reduced metal oxides;
a riser that is in fluid communication with the fuel reactor and receives the syngas, unburned gases, and the reduced metal oxides, and is in fluid communication with the cracking reactor such that a first portion of reduced metal oxides is transported from the riser to the cracking reactor and a second portion of reduced metal oxides is transported from the riser to the fuel reactor;
an air reactor that is in fluid communication with the fuel reactor through a second conduit and receives reduced metal oxides from the fuel reactor via the second conduit, the air reactor including an inlet for the introduction of air for oxidizing the reduced metal oxides to generate oxidized metal oxides and flue gases; and
a third conduit that fluidly connects the air reactor and the fuel reactor such that a first portion of the oxidized metal oxides is transported from the air reactor to the fuel reactor, and a second portion of the oxidized metal oxides is recycled back to the air reactor.

2. The system of claim 1 , further including a separation device in fluid communication with the cracking reactor through a fourth conduit, the separation device receiving the petroleum-based products from the cracking reactor.

3. The system of claim 1 , further including a separator in fluid communication with the riser through a fourth conduit, the separator receiving the syngas, the unburned gases, and the reduced metal oxides from the riser, separating the syngas unburned gases from the reduced metal oxides, and transporting the reduced metal oxides to the cracking reactor and the fuel reactor.

4. The system of claim 3 , further including a splitter reactor for maintaining pressure balance between the cracking reactor and the fuel reactor, the splitter reactor being fluidly connected to the separator by a fifth conduit and through which the reduced metal oxides from the separator pass prior to being received by the cracking reactor and the fuel reactor.

5. The system of claim 1 , further including a separator in fluid communication with the air reactor through a fourth conduit, the separator receiving the oxidized metal oxides and flue gases from the air reactor, separating the oxidized metal oxides from the flue gases, and transporting the oxidized metal oxides to the fuel reactor and the air reactor.

6. The system of claim 5 , further including a splitter reactor for maintaining pressure balance between the fuel reactor and the air reactor, the splitter reactor being fluidly connected to the separator by a fifth conduit and through which the oxidized metal oxides from the separator pass prior to being received by the fuel reactor and the air reactor.

7. The system of claim 1 , wherein the metal oxides are disposed in a bed that is within the cracking reactor.

8. The system of claim 1 , wherein the fuel reactor is one of a turbulent bed, fluidized bed, and circulating fluidized bed.

9. The system of claim 1 , wherein the cracking reactor is one of a turbulent bed, fluidized bed, and circulating fluidized bed.

10. The system of claim 1 , wherein the petroleum-based products comprise products selected from the group consisting of naphtha, gasoline, diesel fuel, petcoke, gas oil, and LPG.

11. The system of claim 2 , wherein the system is configured to recycle the petroleum-based products from the separation device to the cracking reactor to increase the yield of petcoke deposited on the reduced metal oxides.

12. The system of claim 1 , wherein the cracking reactor has a pressure in the range of 15 psig to 35 psig.

13. The system of claim 1 , wherein the fuel reactor is operated at a temperature of the range of 850° C. to 1200° C. during gasification.

14. The system of claim 1 , wherein the unburned gases contains sulfur.

15. The system of claim 14 , wherein the riser is further configured to receive a sulfur-absorbing material.

16. The system of claim 15 , wherein the sulfur-absorbing material is limestone.

Assignees

• Saudi Arabian Oil Co

Inventors

• Hoteit Ali
• Younes Mourad
• Jamal Aqil

Classifications

• C10G9/28 Primary

  with preheated moving solid material · CPC title

• C10G2300/4081

  Recycling aspects · CPC title

• C10G2300/107

  Atmospheric residues having a boiling point of at least about 538 °C · CPC title

• C10G2300/708

  Coking aspect, coke content and composition of deposits · CPC title

• C10G9/005 Primary

  Coking (in order to produce liquid products mainly) · CPC title