Method and apparatus for treating exhaust gas

Patent metadata

Field	Value
Publication number	US-11731079-B2
Application number	US-202217715431-A
Country	US
Kind code	B2
Filing date	Apr 7, 2022
Priority date	Jan 6, 2022
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

The present disclosure relates to a method for treating exhaust gas including a plasma reaction operation of reacting exhaust gas containing a volatile organic compound (VOC) with low-temperature plasma to generate exhaust gas containing a VOC-derived intermediate, and a combustion operation of combusting the exhaust gas containing the VOC-derived intermediate to produce carbon dioxide and water.

First claim

The invention claimed is:

1. A method for treating exhaust gas, the method comprising:
a plasma reaction operation comprising reacting exhaust gas containing a volatile organic compound (VOC) with low-temperature plasma to generate exhaust gas containing a VOC-derived intermediate;
a combustion operation comprising combusting the exhaust gas containing the VOC-derived intermediate to produce carbon dioxide and water; and
before the plasma reaction operation, an operation of preheating the exhaust gas containing the volatile organic compound (VOC) to have a temperature in a range from 15° C. to 150° C.

2. The method of claim 1 , wherein the low-temperature plasma has a temperature in a range from 15 to 150° C.

3. The method of claim 1 , wherein the low-temperature plasma is generated by dielectric barrier discharge.

4. The method of claim 1 , wherein the low-temperature plasma includes plasma containing at least one selected from a group consisting of nitric oxide (NO), nitrogen (N 2 ), oxygen (O), and ozone (O 3 ).

5. The method of claim 1 , wherein the combustion operation combusts the exhaust gas containing the VOC-derived intermediate at a temperature range from 600 to 790° C.

6. The method of claim 1 , wherein the combustion operation is independently performed in a separate unit different from a unit where the plasma reaction operation is performed after the plasma reaction operation is terminated.

7. The method of claim 6 , wherein the combustion operation is performed using a regenerative thermal oxidizer.

8. An apparatus for treating exhaust gas, the apparatus comprising:
a plasma reaction portion configured to react low-temperature plasma with exhaust gas containing a volatile organic compound (VOC) to generate exhaust gas containing a VOC-derived intermediate; and
a combustion reaction portion configured to combust the exhaust gas containing the VOC-derived intermediate to produce carbon dioxide and water; and
a preheater for preheating the exhaust gas containing the volatile organic compound.

9. The apparatus of claim 8 , further comprising:
a low-temperature plasma generator for generating the low-temperature plasma by dielectric barrier discharge.

10. The apparatus of claim 8 , wherein the combustion reaction portion is disposed independently of the plasma reaction portion.

11. The apparatus of claim 8 , wherein the combustion reaction portion is a regenerative thermal oxidizer.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Korea Inst Ind Tech

Inventors

• Kim Kyoung Hye
• Kim Su Han
• Kang Hyun Woo
• Choi Jun

Classifications

• B01D2259/818

  Employing electrical discharges or the generation of a plasma · CPC title

• B01D53/72 Primary

  Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons · CPC title

• F23G7/068 Primary

  using regenerative heat recovery means · CPC title

• B01D53/76

  Gas phase processes, e.g. by using aerosols · CPC title

• B01D2251/102

  Oxygen · CPC title