Ultraviolet and hydrogen peroxide or ozone or ozone and hydrogen peroxide treatment to simultaneously control nitrosamine, nitramine, amine and aldehyde emissions from amine-based carbon capture

Patent metadata

Field	Value
Publication number	US-9937466-B2
Application number	US-201214001247-A
Country	US
Kind code	B2
Filing date	Feb 23, 2012
Priority date	Feb 23, 2011
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

Apparatuses for controlling emissions of carbon capture facilities and associated methods are disclosed that generally involve a chamber defining at least one washwater packing. The exemplary apparatuses further include at least one washwater return line, a UV treatment zone and a hydrogen peroxide treatment zone. The UV treatment zone generally receives UV energy sufficient to substantially destroy a first emission compound and the hydrogen peroxide treatment zone generally receives a hydrogen peroxide medium sufficient to substantially oxidize a second emission compound to a less volatile final product. An alternative exemplary apparatus generally involves a UV treatment zone and an ozonation treatment zone, further including a hydrogen peroxide treatment zone applied within the ozonation treatment zone. The exemplary methods generally include applying at least one of a UV treatment, a hydrogen peroxide treatment and an ozonation treatment.

First claim

The invention claimed is:

1. A method for controlling emissions of carbon capture facilities, comprising:
providing at least one washwater packing zone, a UV treatment zone positioned below and in fluid communication with the at least one washwater packing zone, and at least one washwater return line in fluid communication with the UV treatment zone;
applying a UV treatment to a washwater stream in the UV treatment zone; and
applying an ozonation treatment to the washwater stream in the at least one washwater return line;
wherein the UV treatment substantially destroys a first emission compound in the washwater stream; and
wherein the ozonation treatment substantially oxidizes a second emission compound in the washwater stream to a less volatile final product.

2. The method of claim 1 , further comprising applying a second UV treatment to the wastewater stream in the at least one washwater return line.

3. The method of claim 1 , wherein the ozonation treatment comprises applying an ozone injection to the washwater stream in the at least one washwater return line.

4. The method of claim 1 , further comprising applying a hydrogen peroxide treatment within the ozonation treatment.

5. The method of claim 4 , wherein the hydrogen peroxide treatment is a hydrogen peroxide injection.

6. The method of claim 4 , wherein the hydrogen peroxide treatment substantially oxidizes the second emission compound to the less volatile final product.

7. The method of claim 1 , wherein the first emission compound includes at least one of a nitrosamine and a nitramine.

8. The method of claim 1 , wherein the second emission compound includes at least one of a nitrite, an aldehyde and an amine.

9. The method of claim 1 , wherein the less volatile final product includes at least one of a nitrate, a carboxylic acid and an oxidized amine product.

10. The method of claim 2 , wherein the UV treatment and the second UV treatment are applied in at least one of a water phase and a gas phase.

Assignees

• Mitch William A
• Univ Yale

Inventors

• Mitch William A

Classifications

• B01D53/007 Primary

  by irradiation · CPC title

• B01D2257/704

  Solvents not covered by groups B01D2257/702 - B01D2257/7027 · CPC title

• B01D2259/804

  UV light · CPC title

• B01D53/54

  Nitrogen compounds · CPC title

• B01D2251/106

  Peroxides · CPC title