# US 9,750,200 B2 · Apparatus for carbon dioxide enrichment

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- Number: US 9,750,200 B2
- Document ID: US9750200B2
- Status: Granted
- Kind: B2
- Application number: 14/904,136
- Filed: 2014-07-11
- Published: 2016-06-02
- Granted: 2017-09-05
- Earliest claimed: 2013-07-11
- Assignees: The Royal Institution for the Advancement of Learning/Mcgill University
- Applicants: Royal Institution for the Advancement of Learning/McGill University
- Inventors: Mark Lefsrud; Yves Roy; Francis Filion; Julien Bouchard; Quoc Nguyen; Louis-Martin Dion; Antony Glover
- Web page: https://patentgrep.com/patent/US9750200B2

## CPC

- A01G 9/18: Greenhouses for treating plants with carbon dioxide or the like
- A01G 7/02: Treatment of plants with carbon dioxide
- B01D 53/50: Sulfur oxides (B01D53/60 takes precedence)
- B01D 53/56: Nitrogen oxides (B01D53/60 takes precedence)
- B01D 53/62: Carbon oxides
- B01D 53/86: Catalytic processes
- B01D 53/869: {Multiple step processes}
- B01D 53/885: {Devices in general for catalytic purification of waste gases}
- F23J 15/02: of purifiers, e.g. for removing noxious material (traps for solid residues F23J3/04)
- F27B 17/0016: {Chamber type furnaces}
- F27D 99/0033: {using burners}
- B01D 2255/1023: Palladium
- B01D 2255/702: Carbon
- B01D 2256/22: Carbon dioxide
- B01D 2257/302: Sulfur oxides
- B01D 2257/404: Nitrogen oxides other than dinitrogen oxide
- B01D 2257/502: Carbon monoxide
- B01D 2257/708: Volatile organic compounds V.O.C.'s
- B01D 2258/0283: Flue gases
- Y02P 10/122: by capturing or storing CO2
- Y02P 60/20: Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- A01G: HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING (picking of fruits, vegetables, hops or the like A01D46/00; propagating unicellular algae C12N1/12)
- 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)
- F23J: REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES (combustion apparatus for consuming smoke or fumes, e.g. exhaust gases, F23G7/06)
- F27B: FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27D: DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A flue gas treatment apparatus has a flue gas inlet, a treated gas outlet downstream of the flue gas inlet, and a gas flow path therebetween. The flue gas treatment apparatus comprises a particulate removal device. A first heater is downstream of the particulate removal device. The first heater heats the flue gas to a first treatment temperature. A first catalytic converter is downstream of the first heater for eliminating at least some CO and SO2 from the flue gas. A second heater is downstream of the first catalytic converter for heating the flue gas to a second treatment temperature. A second catalytic converter is downstream of the second heater for eliminating at least some NOx from the flue gas. At least a first fan forces the flue gas from the flue gas inlet to the treated gas outlet.

## Claims

### Claim 1

An apparatus for carbon dioxide enrichment comprising:
a) a biomass combustion furnace for generating a carbon dioxide rich flue gas, the biomass combustion furnace having a flue gas outlet; and
b) a flue gas treatment apparatus having a flue gas inlet in communication with the flue gas outlet, a treated gas outlet downstream of the flue gas inlet, and a gas flow path therebetween, the flue gas treatment apparatus comprising:
i) a particulate removal device in the gas flow path for eliminating at least some particulate matter from the flue gas;
ii) a first heater in the gas flow path downstream of the particulate removal device, the first heater for heating the flue gas to a first treatment temperature;
iii) a first catalytic converter in the gas flow path downstream of the first heater for eliminating at least some carbon monoxide and sulfur dioxide from the flue gas;
iv) a second heater in the gas flow path downstream of the first catalytic converter for heating the flue gas to a second treatment temperature;
v) a second catalytic converter in the gas flow path downstream of the second heater for eliminating at least some NOx from the flue gas; and
vi) at least a first fan for forcing the flue gas from the flue gas inlet to the treated gas outlet;
wherein the treated gas outlet is connected to a greenhouse for feeding the treated gas to the greenhouse for carbon dioxide enrichment.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein the first catalytic converter is a palladium-based catalytic converter.

### Claim 3 (depends on 1)

The apparatus of claim 1, wherein the first treatment temperature is lower than the second treatment temperature.

### Claim 4 (depends on 1)

The apparatus of claim 1, wherein the particulate removal device comprises a filter.

### Claim 5 (depends on 4)

The apparatus of claim 4, wherein the filter is a fiberglass filter pad.

### Claim 6 (depends on 1)

The apparatus of claim 1, wherein the first fan is positioned upstream of the particulate removal device.

### Claim 7 (depends on 1)

The apparatus of claim 1, wherein the first fan comprises an impeller mounted in a frame, and a motor driving the impeller, and wherein the motor is positioned exterior to the frame and is spaced from the gas flow path.

### Claim 8 (depends on 7)

The apparatus of claim 7, wherein the motor is connected to the impeller by a shaft extending through the frame.

### Claim 9 (depends on 1)

The apparatus of claim 1, further comprising a second fan, the second fan positioned downstream of the second catalytic converter.

### Claim 10 (depends on 1)

The apparatus of claim 1, wherein the first treatment temperature is between about 200 degrees Celsius and 250 degrees Celsius.

### Claim 11 (depends on 1)

The apparatus of claim 1, wherein the second treatment temperature is between about 300 degrees Celsius and 370 degrees Celsius.

### Claim 12

A flue gas treatment apparatus for treating a carbon dioxide rich flue gas, the flue gas treatment apparatus comprising:
a) a flue gas inlet connectable in fluid communication with a flue gas outlet of a combustion furnace, a treated gas outlet downstream of the flue gas inlet, and a gas flow path therebetween, wherein the gas flow path is defined by a frame;
b) a particulate removal device in the gas flow path for eliminating at least some particulate matter from the flue gas;
c) a first heater in the gas flow path downstream of the particulate removal device, the first heater for heating the flue gas to a first treatment temperature;
d) a first catalytic converter in the gas flow path downstream of the first heater for eliminating at least some carbon monoxide and sulfur dioxide from the flue gas;
e) a second heater in the gas flow path downstream of the first catalytic converter for heating the flue gas to a second treatment temperature;
f) a second catalytic converter in the gas flow path downstream of the second heater for eliminating at least some NOx from the flue gas; and
g) at least a first fan and a second fan for forcing the flue gas from the flue gas inlet to the treated gas outlet, wherein the first fan is a centrifugal fan that is upstream of the particulate removal device and comprises an impeller mounted in the frame and a motor driving the impeller, wherein the motor is positioned exterior to the frame and is spaced from the gas flow path, and wherein the motor is connected to the impeller by a shaft extending through the frame, and wherein the second fan is an in-line duct fan that is downstream of the second catalytic converter.