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US 2015/0315944 A1Published application
Aftertreatment System for Simultaneous Emissions Control in Stationary Rich Burn Engines
AssigneeGeneral Electric Company
InventorMaruthi Narasinga Rao Devarakonda
Life of this patent
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Abstract
A catalyst system may include a three-way catalyst that may receive exhaust gases from an engine and convert the exhaust gases to first converted exhaust gases. An ammonia slip catalyst may receive the first converted exhaust gases and convert the first converted exhaust gases to second converted exhaust gases. A hydrocarbon oxidation catalyst may receive the second converted exhaust gases and convert the second converted exhaust gases to third converted exhaust gases.
Claims20
A system comprising:
- an exhaust aftertreament system, comprising:
- a three-way catalyst that receives exhaust gases from an engine and converts the exhaust gases to first converted exhaust gases;
- an ammonia slip catalyst that receives the first converted exhaust gases and converts the first converted exhaust gases to second converted exhaust gases;
- a hydrocarbon oxidation catalyst that receives the second converted exhaust gases and converts the second converted exhaust gases to third converted exhaust gases;
- and
- a mid-bed air injection system that injects air into the first converted exhaust gases upstream of the ammonia slip catalyst and injects air into the second converted exhaust gases upstream of the hydrocarbon oxidation catalyst.
3 more elements
A method comprising:
- receiving exhaust gases from an engine at a three-way catalyst;
- converting, at the three-way catalyst, the exhaust gases to first converted exhaust gases;
- injecting air, via a mid-bed air injection system, into the first converted exhaust gases upstream of an ammonia slip catalyst;
- receiving the first converted exhaust gases at the ammonia slip catalyst;
- converting, at the ammonia slip catalyst, the first converted exhaust gases to second converted exhaust gases;
- injecting air, via the mid-bed air injection system, into the second converted exhaust gases upstream of the hydrocarbon oxidation catalyst;
- receiving the second converted exhaust gases at the hydrocarbon oxidation catalyst;
- and
- converting, at the hydrocarbon oxidation catalyst, the second converted exhaust gases to third converted exhaust gases.
6 more elements
A system comprising:
- an internal combustion engine that generates exhaust gases;
- a three-way catalyst that receives the exhaust gases and converts the exhaust gases to first converted exhaust gases;
- an ammonia slip catalyst that receives the first converted exhaust gases and converts the first converted exhaust gases to second converted exhaust gases;
- a hydrocarbon oxidation catalyst that receives the second converted exhaust gases and converts the second converted exhaust gases to third converted exhaust gases;
- and
- a mid-bed air injection system that injects air into the first converted exhaust gases upstream of the ammonia slip catalyst and injects air into the second converted exhaust gases upstream of the hydrocarbon oxidation catalyst.
3 more elements
Dependencies are inferred from the claim text.