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Post-EGR Syngas Injection for Natural Gas and Diesel Combustion Engines NOx Reduction

IP.com Disclosure Number: IPCOM000206105D
Publication Date: 2011-Apr-13
Document File: 1 page(s) / 57K

Publishing Venue

The IP.com Prior Art Database

Abstract

Syngas is injected with the EGR exit stream to cool the steam as well as improve the emissions and efficiency of an engine.

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Title:

Post-EGR Syngas Injection for Natural Gas and Diesel Combustion Engines NOx Reduction

Abstract:

Syngas is injected with the EGR exit stream to cool the steam as well as improve the emissions and efficiency of an engine.

 

Discussion:

An existing system uses a reformer to produce hydrogen for a natural gas engine running stoichiometrically with a three-way catalyst and EGR valve. The syngas generated by the reformer is used to reduce the emissions and raise the efficiency of the engine. Via in-cylinder syngas injection.

The syngas is injected into the EGR exit stream, such that the syngas could cool the stream as well as improve the emissions and efficiency of the engine. Also, this disclosure extends coverage to other stoichiometric engines.

Benefits:

This solution allows for the potential removal of a cooler and a simpler injection strategy (In-cylinder injection is more difficult than post EGR injection). This scheme is shown in the attached Figure.