NDLI: Nitrogen Enriched Combustion of a Natural Gas Engine to Reduce NOx Emissions

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Munidhar, S. Biruduganti Sreenath, B. Gupta Mcconnell, Steven Sekar, Raj
Copyright Year	2004
Abstract	Nitrogen enrichment of intake air is proposed as an alternative to Exhaust Gas Recirculation (EGR). Experimental results of nitrogen enriched combustion of a Kohler M12 engine (converted to operate with natural gas) are presented in this paper. A 70% reduction in NOx emissions was observed at full load (4 kW) and ignition timing (IT) equal to −20 ATDC with 2.1% NO2 enrichment (40 slpm). However, NOx reduction was minimal at lower loads. The effect of spark or ignition timing along with nitrogen enrichment is also reported for full load. It is recognized that advancing the ignition timing from conventional values has more advantages than retarding the same. A 68% reduction in NOx and a 0.8% drop in Fuel Conversion Efficiency (FCE) were observed at −30 ATDC ignition timing. However, the maximum ignition timing advance with stable engine operation was limited to −40 ATDC. Some of the drawbacks encountered were engine misfire at higher concentrations of nitrogen-rich air and retarded spark timing resulting in poor FCE.
Sponsorship	Internal Combustion Engine Division
Starting Page	695
Ending Page	701
Page Count	7
File Format	PDF
ISBN	0791837467
DOI	10.1115/ICEF2004-0843
e-ISBN	0791837483
Conference Proceedings	ASME 2004 Internal Combustion Engine Division Fall Technical Conference
Language	English
Publisher Date	2004-10-24
Publisher Place	Long Beach, California, USA
Access Restriction	Subscribed
Subject Keyword	Exhaust gas recirculation Gas engines Ignition Nitrogen oxides Combustion Nitrogen Fuels Engines Stress Natural gas Emissions
Content Type	Text
Resource Type	Article

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