System and method for reducing carbon dioxide emissions from a flue gas generated via combusting a fossil fuel

Patent metadata

Field	Value
Publication number	US-9956517-B2
Application number	US-201615161545-A
Country	US
Kind code	B2
Filing date	May 23, 2016
Priority date	May 23, 2016
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

A system for reducing carbon dioxide emissions from a flue gas generated via combusting a fossil fuel is provided. The system includes a carbonator and a classifier. The carbonator is configured to receive the flue gas and carbon absorbing particles. The classifier is fluidly connected to the carbonator and configured to receive a mixture that includes heat-transferring particles and the carbon absorbing particles. The mixture is fluidized within the classifier via the flue gas at a velocity such that the flue gas entrains and transports the carbon absorbing particles to the carbonator while the heat-transferring particles are not entrained nor transported to the carbonator.

First claim

What is claimed is:

1. A method for reducing carbon dioxide emissions from a flue gas generated via combusting a fossil fuel, the method comprising:
fluidizing a mixture that includes heat-transferring particles and carbon absorbing particles within a classifier via the flue gas at a velocity such that the flue gas entrains and transports the carbon absorbing particles to a carbonator fluidly connected to the classifier while the heat-transferring particles are not entrained nor transported to the carbonator.

2. The method of claim 1 , wherein the carbonator has an upstream section and a downstream section, and the classifier is fluidly connected to the carbonator at the upstream section.

3. The method of claim 1 , wherein the classifier is located at an elevation lower than the carbonator.

4. The method of claim 1 , wherein the classifier is disposed upstream of the carbonator.

5. The method of claim 1 , wherein the method further comprises:
receiving the carbon absorbing particles from the classifier at the carbonator;
absorbing carbon dioxide via the carbon absorbing particles within the carbonator;
receiving the carbon absorbing particles from the carbonator at a calciner;
receiving the heat-transferring particles from the classifier at the calciner;
forming the mixture in the calciner by heating the carbon absorbing particles via the heat-transferring particles such that the absorbed carbon dioxide is released from the carbon absorbing particles; and
receiving the mixture from the calciner at the classifier.

6. The method of claim 1 , wherein the velocity is less than or equal to 1 m/s.

7. The method of claim 1 , wherein the carbon absorbing particles comprise at least one of CaO and CACO 3 .

8. The method of 1 , wherein the heat-transferring particles are inert.

9. A method for reducing carbon dioxide emissions from a flue gas generated via combusting a fossil fuel, the method comprising:
fluidizing a mixture that includes heat-transferring particles and carbon absorbing particles via a classification gas in a first fluidized bed or contacting chamber of a classifier at a first velocity that entrains and transports some of the carbon absorbing particles to a carbonator fluidly connected to the classifier such that the remaining mixture flows to a second fluidized bed or contacting chamber of the classifier; and
fluidizing the remaining mixture via the classification gas in the second fluidized bed or contacting chamber at a second velocity that is greater than the first velocity and entrains and transports some of the carbon absorbing particles to the carbonator.

10. The method of claim 9 , wherein the method further comprises:
cooling the heat-transferring particles via the classifier.

Assignees

• General Electric Technology Gmbh
• General Electric Company Gmbh

Inventors

• Tan Hao
• Balfe Michael Charles

Classifications

• B01D2253/1124

  Metal oxides · CPC title

• B01D2258/0283

  Flue gases · CPC title

• B01D2251/404

  of calcium · CPC title

• B01D2257/504

  Carbon dioxide · CPC title

• B01D2257/10

  Single element gases other than halogens · CPC title