Investigations of Nitric Oxide Formation Through the Use of Barium Additive and Two-Stage Model Texas A&M University

Format:

Conference/Event

Author/Creator:

Song, Song, author.

Contributor:

Jacobs, Timothy

Tompkins, Brandon

Conference Name:

SAE 2012 World Congress & Exhibition (2012-04-24 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

As emission standards become more stringent, many studies havebeen carried out to understand and reduce the emissions from dieselcombustion engines, among which nitric oxide (NO) emissions andsoot are known to have the trade-off relation during combustionprocesses. One aspect of this trade-off is manifested by the roleradiation heat transfer plays on post-flame gas temperature, thusaffecting NO formation. For example, a decrease in in-cylinder sootdecreases radiation heat transfer causing an increase in post-flamegas temperature and partially contributing to the correspondingsoot-NO relationship with an increase in NO formation.This topic has re-emerged with the increased use of biodiesel; apotential explanation for the so-called "biodieselNOx penalty" is biodiesel's inherently reducedin-cylinder soot. In order to assess how much radiation heattransfer may affect NO formation, this study seeks to isolate andcontrol the soot formation of petroleum diesel through the use ofbarium additive. To further assist the analysis of the experimentalresults, a two-stage model that is capable of predictingin-cylinder NO formation is used.The experimental results show that soot concentrations decreasewith an increase in the barium additive. The expected result of acorresponding increase in NO concentration with the sootconcentration, however, could not be statistically observed. Thebehavior of the NO concentrations, for example, is better explainedby the changes in ambient temperature than by changes in sootconcentration

Notes:

Vendor supplied data

Publisher Number:

2012-01-0861

Access Restriction:

Restricted for use by site license