System for reducing VOC and nitrogen oxide and method for reducing same

Patent metadata

Field	Value
Publication number	US-11965446-B2
Application number	US-202017432063-A
Country	US
Kind code	B2
Filing date	Feb 20, 2020
Priority date	Feb 20, 2019
Publication date	Apr 23, 2024
Grant date	Apr 23, 2024

Abstract

The present invention relates to a VOC reduction system and a VOC reduction method that applies pulse type thermal energy to a catalyst to activate the catalyst and oxidizes and removes the VOC.

First claim

The invention claimed is:

1. A VOC reduction system comprising:
a housing having an inlet and an outlet formed such that gas is introduced and discharged therethrough;
an adsorption/desorption module disposed in the housing to adsorb/desorb volatile organic compounds (VOC) included in the gas;
a VOC front-end sensing unit disposed on one side of the adsorption/desorption module to sense the concentration of VOC adsorbed by the adsorption/desorption module;
a catalyst disposed on the other side of the adsorption/desorption module to oxidize VOC desorbed by the adsorption/desorption module;
a heating carrier disposed on one side of the catalyst to supply thermal energy directly to the catalyst; and
a VOC rear-end sensing unit disposed behind the heating carrier to sense the concentration of VOC converted by the catalyst,
wherein the heating carrier further includes a heating means supplying pulse type thermal energy, and
the heating means is associated with the VOC front-end sensing unit, and applies the pulse type thermal energy to the heating carrier when the VOC concentration sensed by the VOC front-end sensing unit is sensed as a predetermined value or higher.

2. The VOC reduction system of claim 1 , wherein the adsorption/desorption module includes zeolite as an adsorbent.

3. The VOC reduction system of claim 1 , wherein the catalyst is formed by introducing to a carrier at least one selected from the group consisting of Pt, Pd, Rh, Cu, Cr, Mn, Fe, Ni, Co, V, Zn, and oxides thereof, and
the carrier has a bulk form compressed by a presser.

4. The VOC reduction system of claim 3 , wherein the carrier is at least one selected from the group consisting of Al 2 O 3 , SiO 2 , and TiO 2 .

5. The VOC reduction system of claim 1 , wherein the catalyst is a monolith catalyst by introducing at least one selected from the group consisting of Pt, Pd, Rh, Cu, Cr, Mn, Fe, Ni, Co, V, Zn, and oxides thereof to a carrier and coating the material on a honeycomb substrate.

Assignees

• Korea Res Inst Chemical Tech

Inventors

• Lee Jin Hee
• Heo Iljeong
• Chang Tae Sun
• Park Ji Hoon
• Kim Sang Joon
• Kim Young Jin

Classifications

• F01N3/202 Primary

  using microwaves · CPC title

• B01D53/0438

  Cooling or heating systems · CPC title

• B01D53/30

  Controlling by gas-analysis apparatus (regulating non electrical variables in general G05D) · CPC title

• B01D53/9431 Primary

  Processes characterised by a specific device · CPC title

• B01D53/9481

  Catalyst preceded by an adsorption device without catalytic function for temporary storage of contaminants, e.g. during cold start · CPC title