Ammonia production catalyst and after treatment system

Abstract

The invention discloses an ammonia production catalyst and an after treatment system. The after treatment system may include an exhaust pipe through which an exhaust gas flows; a three-way catalyst (TWC) mounted on the exhaust pipe and purifying HC, CO, and NOx contained in the exhaust gas, an ammonia production catalyst (APC) mounted on the exhaust pipe at a downstream of the TWC, storing NOx ata lean air / fuel ratio, and generating H2, releasing the stored NOx, and generating NH3 using the released NOx and the generated H2 at a rich air / fuel ratio, and a selective catalytic reduction (SCR) catalyst mounted on the exhaust pipe at a downstream of the APC, storing the NH3 generated in the TWC and the APC, and reducing the NOx contained in the exhaust gas using the stored NH3.

Description

technical field

[0001] The present disclosure relates to ammonia generating catalysts (APCs) and aftertreatment systems. Background technique

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] The vehicle may be provided with at least one catalytic converter for reducing emissions (EM) contained in the exhaust gas. Exhaust gas flowing from the engine through an exhaust manifold is driven into a catalytic converter provided on an exhaust pipe and purified therein. After that, the noise of the exhaust gas is reduced while passing through the muffler, and then the exhaust gas is discharged into the air through the tailpipe. The catalytic converter purifies EM contained in exhaust gas. In addition, a particulate filter for trapping particulate matter (PM) in exhaust gas is provided in the exhaust pipe.

[0004] Three-way catalyst (TWC, three-way catalytic converter) is a c...

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