# US 10,245,553 B2 · Apparatus for decomposing low concentration of volatile organic compounds by high flow

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- Number: US 10,245,553 B2
- Document ID: US10245553B2
- Status: Granted
- Kind: B2
- Application number: 15/224,922
- Filed: 2016-08-01
- Published: 2017-06-22
- Granted: 2019-04-02
- Earliest claimed: 2015-12-21
- Assignees: Korea Institute of Science and Technology
- Applicants: Korea Institute of Science and Technology
- Inventors: Jongsoo Jurng; Min Su Kim; Eun Seuk Park; Hyoun Duk Jung; Jin Young Kim
- Web page: https://patentgrep.com/patent/US10245553B2

## CPC

- B01D 53/8668: {Removing organic compounds not provided for in B01D53/8603 - B01D53/8665}
- B01D 53/0407: {Constructional details of adsorbing systems}
- B01D 53/8687: {Organic components}
- B01D 2251/104: Ozone
- B01D 2253/102: Carbon
- B01D 2253/104: Alumina
- B01D 2253/106: Silica or silicates
- B01D 2253/108: Zeolites
- B01D 2255/104: Silver
- B01D 2255/20707: Titanium
- B01D 2255/20723: Vanadium
- B01D 2255/2073: Manganese
- B01D 2255/20738: Iron
- B01D 2255/20746: Cobalt
- B01D 2255/20753: Nickel
- B01D 2257/708: Volatile organic compounds V.O.C.'s
- B01D 2258/06: Polluted air
- B01D 2259/4009: using hot gas
- B01D 2259/4508: for cleaning air in buildings
- Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## Abstract

Disclosed is an apparatus for decomposing low-concentration volatile organic compounds, which includes: an adsorption unit configured to adsorb a volatile organic compound; a heated air supply unit configured to supply a heated air to the adsorption unit; an oxidation decomposing catalyst unit configured to decompose a volatile organic compound detached from the adsorption unit; and an ozone supply unit configured to supply an ozone to the oxidation decomposing catalyst unit. The apparatus may maximize an exchange cycle semi-permanently by adsorbing low-concentration VOC under a high-flow condition and then detaching VOC within a short time and also by recycling an adsorption filter. In addition, the apparatus may effectively decompose VOC substances detached by a low flow into carbon dioxide and water under a condition with most excellent oxidation decomposition efficiency by using an oxidation decomposing catalyst filter.

## Claims

### Claim 1

An apparatus for decomposing low-concentration volatile organic compounds, comprising:
an adsorption unit configured to adsorb a volatile organic compound;
a heated air supply unit configured to supply a heated air to the adsorption unit;
an oxidation decomposing catalyst unit configured to decompose a volatile organic compound detached from the adsorption unit by a low flow with a space velocity of 30,000/hr or below;
an ozone supply unit configured to supply an ozone to the oxidation decomposing catalyst unit;
a high-flow circulation fan configured to introduce an external air into the apparatus and discharge a clean air free from the volatile organic compound so that air consistently circulates by a high flow with a space velocity of 100,000/hr or above; and
a detaching fan configured to transmit the external air to the heated air supply unit and the ozone supply unit.

### Claim 2 (depends on 1)

The apparatus for decomposing low-concentration volatile organic compounds according to claim 1, further comprising:
a catalyst protecting filter unit disposed at the front of the adsorption unit in series with the adsorption unit to protect a catalyst by removing particle substances contained in the external air.

### Claim 3 (depends on 2)

The apparatus for decomposing low-concentration volatile organic compounds according to claim 2,
wherein the catalyst protecting filter unit includes a prefilter or a microfiber filter.

### Claim 4 (depends on 1)

The apparatus for decomposing low-concentration volatile organic compounds according to claim 1,
wherein the adsorption unit includes an adsorbent selected from the group consisting of zeolite, alumina-based adsorbent, silica-based adsorbent, and activated carbon.

### Claim 5 (depends on 1)

The apparatus for decomposing low-concentration volatile organic compounds according to claim 1,
wherein the heated air supply unit supplies an air of 40° C. to 70° C. to the adsorption unit.

### Claim 6 (depends on 1)

The apparatus for decomposing low-concentration volatile organic compounds according to claim 1,
wherein the detaching fan transmits the external air to the heated air supply unit and the ozone supply unit by a low flow.

### Claim 7 (depends on 6)

The apparatus for decomposing low-concentration volatile organic compounds according to claim 6,
wherein the external air has a flow with a space velocity of 1,500/hr to 30,000/hr.

### Claim 8 (depends on 1)

The apparatus for decomposing low-concentration volatile organic compounds according to claim 1,
wherein the detaching fan is operated for 1 to 2 hours from midnight to 7 a.m. to transmit the external air to the heated air supply unit and the ozone supply unit, and the circulation fan is operated from 8 a.m. to 11 p.m. to adsorb a volatile organic compound to the adsorption layer, different from the detaching fan.

### Claim 9 (depends on 1)

The apparatus for decomposing low-concentration volatile organic compounds according to claim 1,
wherein the air circulated by the circulation fan has a flow with a space velocity of 100,000/hr to 500,000/hr.

### Claim 10 (depends on 1)

The apparatus for decomposing low-concentration volatile organic compounds according to claim 1,
wherein the oxidation decomposing catalyst unit includes an oxidation decomposing catalyst, and the oxidation decomposing catalyst is at least one selected from the group consisting of MnO2, NiO, CoO, Fe2O3, V2O5, and AgO2.

### Claim 11 (depends on 10)

The apparatus for decomposing low-concentration volatile organic compounds according to claim 10,
wherein the oxidation decomposing catalyst unit includes a honeycomb supported by a manganese-titania catalyst.

### Claim 12 (depends on 1)

The apparatus for decomposing low-concentration volatile organic compounds according to claim 1,
wherein the oxidation decomposing catalyst unit allows the ozone supplied from the ozone supply unit to react with an oxidation decomposing catalyst to generate an oxygen atom (O*) in an activated state or an activated oxygen molecule, by which volatile organic substances are decomposed.