Methods for carbon dioxide capture

Patent metadata

Field	Value
Publication number	US-10549232-B1
Application number	US-201916263688-A
Country	US
Kind code	B1
Filing date	Jan 31, 2019
Priority date	Jan 31, 2019
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

The subject invention provides systems and methods for capturing carbon dioxide in a cyclic process of mechano-chemical reactions. The subject invention also provides systems and methods for synthesizing siderite, by means of mechano-chemical reactions, using mill rotation. Siderite acts as an efficient reversible sorbent and can be decomposed, generating magnetite, carbon and/or metallic iron as well as pure carbon dioxide. Said systems and methods employing carbon dioxide capture/release reactions in the carbonation-calcination cycles are suitable for using in any iron, steel and non-steel industries to reduce carbon dioxide emissions into the atmosphere.

First claim

What is claimed is:

1. A method for capturing CO 2 comprising a plurality of carbonation and calcination cycles, each carbonation and calcination cycle comprising steps of
1) introducing a mixture of reaction materials into a carbonation reactor, the reaction materials comprising water and at least one of:
i) magnetite and iron, or
ii) magnetite and carbon;

2) passing a stream of gas comprising CO 2 into the carbonation reactor;
3) applying a revolution speed that rotates the carbonation reactor so that a grinding mechanism inside the carbonation reactor grinds the reaction materials while CO 2 reacts with the reaction materials to form siderite; and
4) decomposing siderite at room temperature to produce Fe 3 O 4 and Fe, or Fe 3 O 4 and C to be used in step 1) in subsequent cycles.

2. The method according to claim 1 , the revolution speed ranging from about 100 rpm to 500 rpm.

3. A method for capturing CO 2 via mechano-chemical reactions comprising a plurality of carbonation and calcination cycles, each carbonation and calcination cycle comprising steps of:
introducing a mixture of reaction materials comprising metal oxides and a reducing agent into a carbonation reactor, the carbonation reactor comprising a grinding mechanism for grinding the reaction materials;
passing a stream of gas comprising CO 2 into the carbonation reactor;
applying a revolution speed that rotates the carbonation reactor so that the grinding mechanism inside the carbonation reactor grinds the reaction materials while CO 2 reacts with the reaction materials to form metal carbonates; and
decomposing the metal carbonates at room temperature conditions to produce metal oxides and the reducing agent that can be used in subsequent cycles.

4. The method according to claim 3 , the reaction materials comprising magnetite, hematite, wustite, and/or goethite.

5. The method according to claim 3 , the reducing agent being selected from metallic iron and carbon.

6. The method according to claim 3 , the grinding mechanism comprising grinding balls.

7. The system according to claim 3 , the reaction materials and grinding mechanism having a weight ratio of 2:27.

8. The method according to claim 3 , the reaction materials comprising water ranging from 1 mol to 20 mol.

9. The method according to claim 3 , the revolution speed ranging from about 100 rpm to 500 rpm.

10. The method according to claim 3 , the carbonation reactor having an internal temperature ranging from about 20 to about 600° C.

11. The method according to claim 3 , the carbonation reactor having an internal CO 2 pressure of 10, 20 or 30 bar.

Assignees

• Mendoza Eduin Yesid Mora
• Drozd Vadym
• Durygin Andriy
• Saxena Surendra K
• The Florida International Univ Board Of Trustees

Inventors

• Mendoza Eduin Yesid Mora
• Drozd Vadym
• Durygin Andriy
• Saxena Surendra K

Classifications

• B01D2258/025

  from metallurgy plants · CPC title

• B01D2251/604

  Hydroxides · CPC title

• B01D2251/602

  Oxides · CPC title

• B01D53/81

  Solid phase processes · CPC title

• B01D53/80

  Semi-solid phase processes, i.e. by using slurries · CPC title