REDUCING SULFUR GAS EMISSIONS RESULTING FROM THE BURNING OF CARBONACEOUS FUELS

• US 20140053760A1
• Filed: 11/04/2013
• Published: 02/27/2014
• Est. Priority Date: 06/28/2004
• Status: Active Grant

• Current Assignee: Nox Ii Ltd. (Arthur J Gallagher & Company)
• Original Assignee: Nox Ii Ltd. (Arthur J Gallagher & Company)
• Inventors: Comrie, Douglas C., Vellella, Vincent A.
• Granted Patent: US 9,133,408 B2
• Time in Patent Office: Days
• US Class Current: 110/342
• CPC Class Codes: B01D 2251/304 of sodium
• CPC Class Codes: B01D 2251/306 of potassium
• CPC Class Codes: B01D 2251/404 of calcium
• CPC Class Codes: B01D 2255/2047 Magnesium
• CPC Class Codes: B01D 2255/20738 Iron
• CPC Class Codes: B01D 2257/302 Sulfur oxides
• CPC Class Codes: B01D 2257/602 Mercury or mercury compounds
• CPC Class Codes: B01D 53/501 by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
• CPC Class Codes: B01D 53/508 by treating the gases with solids
• CPC Class Codes: B01D 53/64 Heavy metals or compounds thereof, e.g. mercury
• CPC Class Codes: C10L 10/00 Use of additives to fuels or fires for particular purposes additives for liquid carbonaceous fuels characterised by their chemical nature C10L1/10; using binders for briquetting solid fuels C10L5/10; using additives to improve the combustion of solid fuels C10L9/10
• CPC Class Codes: C10L 10/02 for reducing smoke development
• CPC Class Codes: C10L 10/04 for minimising corrosion or incrustation
• CPC Class Codes: C10L 9/10 by using additives
• CPC Class Codes: F23J 7/00 Arrangement of devices for supplying chemicals to fire
• CPC Class Codes: F23K 1/00 Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
• CPC Class Codes: F23K 2201/505 with additives

Abstract

A method of reducing sulfur emissions by applying remediation materials in a powder sorbent onto coal and combusting the coal with the materials applied. The powder sorbent contain sources of silicon, aluminum, calcium, iron, and magnesium, and ash from combustion contains the captured sulfur.

Claims

1. A process for burning coal wherein sulfur is captured and retained in non-reactive form after combustion, the method comprising applying remediation materials in a powder sorbent onto the coal and combusting the coal with the materials applied, wherein the powder sorbent comprises sources of silicon, aluminum, calcium, iron, and magnesium, and wherein ash from combustion comprises the captured sulfur.

2. The method according to claim 1, wherein the remediation materials comprise bentonites or metakaolins.

3. The method according to claim 1, wherein the powder sorbent comprises clay and iron.

4. The method according to claim 3, wherein the clay is selected from calcium montmorillonite, sodium montmorillonite, hectorite, smectites, illites, kaolin, and metakaolin.

5. The method according to claim 1, wherein the powder sorbent comprises portland cement, dolomite, and aluminosilicate clay.

6. The method according to claim 1, wherein the coal is anthracite coal.

7. The method according to claim 1, wherein the coal is bituminous coal.

8. The method according to claim 1, wherein the coal is lignite coal.

9. The method according to claim 1, wherein the coal with the remediation materials applied is a compliant coal, in that when burned it releases less than 1.2 pounds of sulfur for every million BTU'"'"'s of energy produced.

10. A method of burning coal to capture sulfur in a calcium and ceramic based matrix, the process comprising applying remediation materials as a powder onto coal, combusting the coal, and measuring the amount of sulfur in the ash resulting from the combustion, wherein the powder comprises clay and iron.

11. The method according to claim 10, wherein the clay is selected from calcium montmorillonite, sodium montmorillonite, hectorite, smectites, illites, kaolin, and metakaolin.

12. The method according to claim 10, wherein the ash comprises a higher level of sulfur than ash resulting from coal burned without the applied remediation materials.

13. The method according to claim 10, wherein the clay is kaolin or metakaolin.

14. A compliant coal composition comprising coal and remediation materials in powder form, wherein the remediation materials comprise silica, alumina, calcium, iron, and magnesium.

15. The composition according to claim 14, wherein the coal is anthracite coal.

16. The composition according to claim 14, wherein the coal is bituminous coal.

17. The composition according to claim 14, wherein the coal is lignite coal.

18. The composition according to claim 14, wherein the composition comprises 6% or less by weight of the remediation materials.