PREPARATION METHOD FOR GAS ABSORBENT MATERIAL

• US 20110147653A1
• Filed: 12/22/2010
• Published: 06/23/2011
• Est. Priority Date: 12/22/2009
• Status: Abandoned Application

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Zemskova, Svetlana M.
• Application Number:
  US12/975,486
• Publication Number:
  US 20110147653A1
• Time in Patent Office: Days
• US Class Current: 252/184
• CPC Class Codes: B01D 2251/402 of magnesium
• CPC Class Codes: B01D 2251/404 of calcium
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: B01D 53/62 Carbon oxides
• CPC Class Codes: B01J 20/041 Oxides or hydroxides
• CPC Class Codes: B01J 20/10 comprising silica or silicate
• CPC Class Codes: B01J 20/28057 Surface area, e.g. B.E.T specific surface area
• CPC Class Codes: B01J 20/3021 Milling, crushing or grinding
• CPC Class Codes: B01J 20/3085 Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
• CPC Class Codes: Y02C 20/40 of CO2

Abstract

A wet milling process for the creation of a mineral carbonation precursor material containing alkaline earth metal silicate and an alkaline earth metal oxide and the combining of the mineral carbonation precursor material with exhaust gases containing CO₂ and/or SO₂ to create an exhaust gas deprived of CO₂ and/or SO₂ and a carbonated and/or sulfated product of the mineral carbonation precursor material.

Claims

1. A method for producing a mineral carbonation precursor material comprising:

combining an alkaline earth metal silicate and an alkaline earth metal oxide in a slurry,

wet-milling said slurry for more than about 4 hours with grinding media, said slurry containing more alkaline earth metal silicate than alkaline earth metal oxide.

2. A method according to claim 1 wherein:

the wet-milling includes a solids;

liquid ratio of between about 1;

0.1 and about 1;

3.

3. A method according to claim 2 wherein:

the wet-milling conducted at a temperature between about 35°

C. and about 85°

C.

4. A method according to claim 3 wherein:

the wet-milling includes a silicate;

oxide ratio of between about 1;

1 and about 20;

1.

5. A method according to claim 1 wherein:

the wet-milling conducted under conditions sufficient to generate a mineral carbonation precursor material with surface area greater than about 15 m²/g.

6. A method according to claim 1 wherein:

the wet-milling said includes a solids;

liquid ratio of between about 1;

1 and about 1;

2.

7. A method according to claim 6 wherein:

the wet-milling is conducted at a temperature of between about 50°

C. and about 70°

C.

8. A method according to claim 7 wherein:

the wet-milling includes a silicate;

oxide ratio of between about 2;

1 and about 4;

1.

9. A method for producing a mineral carbonation precursor material comprising:

combining a magnesium-containing silicate and calcium oxide in a slurry, wet-milling said slurry for more than 4 hours with grinding media, said slurry containing more magnesium silicate than calcium oxide.

10. The method of claim 9 wherein said magnesium-containing silicate is selected from the group of naturally occurring mineral classes consisting of olivine, serpentine, peridotite, pyroxene, monticellite, tremolite, diopside, and combinations thereof.

11. A method according to claim 9 wherein:

the wet-milling includes a solids;

liquid ratio of between about 1;

0.1 and about 1;

3.

12. A method according to claim 11 wherein:

the wet-milling conducted at a temperature between about 35°

C. and about 85°

C.

13. A method according to claim 12 wherein:

the wet-milling includes a silicate;

oxide ratio of between about 1;

1 and about 20;

1.

14. A method according to claim 9 wherein:

the wet-milling conducted under conditions sufficient to generate a mineral carbonation precursor material with surface area greater than about 15 m²/g.

15. A method according to claim 9 wherein:

the wet-milling said includes a solids;

liquid ratio of between about 1;

1 and about 1;

2.

16. A method according to claim 15 wherein:

the wet-milling is conducted at a temperature of between about 50°

C. and about 70°

C.

17. A method according to claim 16 wherein:

the wet-milling includes a silicate;

oxide ratio of between about 2;

1 and about 4;

1.

18. A mineral carbonation precursor material produced by combining a magnesium-containing silicate and calcium oxide in a slurry, wet-milling said slurry for more than 4 hours with grinding media, wherein said slurry contains more magnesium-containing silicate than calcium oxide.

19. The mineral carbonation precursor material of claim 18 wherein:

the magnesium-containing silicate is selected from the group of naturally occurring mineral classes consisting of olivine, serpentine, forsterite, peridotite, pyroxene, monticellite, tremolite, diopside, and combinations thereof.

20. The mineral carbonation precursor material of claim 18 wherein:

the calcium oxide content is provided by cement kiln dust, blast furnace slag, fly ash, other calcium oxide containing industrial waste product, or combinations thereof.