# US 2014/0193318 A1 · Reductant Decomposition System

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- Number: US 2014/0193318 A1
- Document ID: US20140193318A1
- Status: Published application
- Kind: A1
- Application number: 14/199,089
- Filed: 2014-03-06
- Published: 2014-07-10
- Earliest claimed: 2009-04-02
- Assignees: Cummins Filtration IP, Inc.
- Applicants: Cummins Filtration IP, Inc.
- Inventors: Debbie Davidson; Duncan Engeham; Piotr Uban; David Elsey; Z. Gerald Liu; Ken Pawson; Paul Smith; Ken Capel; Andrew Critchley; David Sarcona; James Goss
- Web page: https://patentgrep.com/patent/US20140193318A1

## CPC

- B01D 53/9495: {Controlling the catalytic process}
- F01N 3/2066: {Selective catalytic reduction [SCR]}
- F01N 2610/02: the substance being ammonia or urea
- F01N 2610/10: the substance being heated, e.g. by heating tank or supply line of the added substance
- Y02T 10/12: Improving ICE efficiencies
- 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)
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

Described herein are various embodiments of a reductant decomposition system. According to one representative embodiment, the reductant decomposition system includes an exhaust gas chamber including an inlet and outlet. The system also includes a first exhaust gas distribution component positioned within the chamber and communicable in exhaust gas receiving communication with the outlet. The first exhaust gas distribution component causes swirling exhaust gas flow patterns within the exhaust gas chamber. Additionally, the system includes a second exhaust gas distribution component positioned within the chamber and communicable in exhaust gas providing communication with the inlet. The second exhaust gas distribution component includes features that cause a swirling exhaust gas flow pattern within a space defined by the second exhaust gas distribution component. Further, the system includes a reductant injector coupled to the exhaust gas chamber. The reductant injector is communicable in reductant injecting communication with exhaust gas within the chamber.

## Claims

### Claim 1

A method for decomposing urea into ammonia, comprising:
passing exhaust gas through a perforation pattern and into a chamber, the perforation pattern causing the exhaust to swirl within the chamber;
injecting urea into the exhaust gas swirling within the chamber; and
passing exhaust gas within the chamber between a plurality of blades to further swirl the exhaust gas within the chamber.

### Claim 2 (depends on 1)

The method of claim 1, wherein the perforation pattern comprises a plurality of first perforations each having a first size and a plurality of second perforations each having a second side larger than the first size, wherein passing exhaust gas through a perforation pattern comprises passing exhaust gas through the first and second perforations.

### Claim 3 (depends on 1)

The method of claim 1, wherein passing exhaust gas within the chamber between the plurality of blades causes the exhaust gas to swirl prior to passing between the plurality of blades and after passing between the plurality of blades.

### Claim 4 (depends on 1)

The method of claim 1, wherein the plurality of blades are positioned about a central axis, the method further comprising directing a portion of exhaust gas radially inward toward the central axis after the exhaust gas passes between the plurality of blades.

### Claim 5 (depends on 4)

The method of claim 4, further comprising directing a portion of exhaust gas radially outward away from the central axis after the exhaust gas passes between the plurality of blades.