Effect of fuel aromatic content and structure on direct-injection diesel engine pollutant emissions

Zannis, TC; Hountalas, DT

dc.contributor.author	Zannis, TC	en
dc.contributor.author	Hountalas, DT	en
dc.date.accessioned	2014-03-01T01:53:57Z
dc.date.available	2014-03-01T01:53:57Z
dc.date.issued	2004	en
dc.identifier.issn	1743-9671	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/27147
dc.subject.classification	Energy & Fuels	en
dc.subject.other	LAMINAR DIFFUSION FLAMES	en
dc.subject.other	EXHAUST EMISSIONS	en
dc.subject.other	SOOT FORMATION	en
dc.subject.other	HYDROCARBONS	en
dc.subject.other	PATHWAYS	en
dc.subject.other	ETHYLENE	en
dc.subject.other	GROWTH	en
dc.title	Effect of fuel aromatic content and structure on direct-injection diesel engine pollutant emissions	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	An experimental investigation is conducted to examine the effect of fuel aromatic fraction and type on DI diesel engine performance, gaseous and particulate emissions. Various diesel fuels with total aromatics between 0 and 27% were tested in a naturally aspirated single-cylinder DI diesel engine. The experimental results reveal a strong relationship between measured pollutant emissions and both total and monoaromatic content, whereas only a small effect is found on other aspects of engine performance. An abrupt increase in exhaust smoke is observed when the aromatic content is increased from 0 to 15%, whereas, for higher aromatic contents, tailpipe soot remains almost constant. Nitrogen oxide and carbon monoxide emissions increase with the increase in total aromatics, whereas unburned hydrocarbons decrease slightly with total aromatics. The substitution of monoaromatics by diaromatics results in an improvement of the bsfc/NOx trade-off and in an increase in CO and HC emissions, whereas it has a rather detrimental effect on soot/NOx trade-off. To examine the sensitivity of exhaust smoke to fuel parameters, a multivariate statistical analysis was carried out. The results of the regression analysis reveal that soot is affected by C/H mass ratio, fuel volatility (end-fuel boiling point), flammability (cetane number) and fuel aromatic percentage and type (monoaromatics and total aromatics).	en
heal.publisher	ENERGY INST	en
heal.journalName	JOURNAL OF THE ENERGY INSTITUTE	en
dc.identifier.isi	ISI:000226162800001	en
dc.identifier.volume	77	en
dc.identifier.issue	511	en
dc.identifier.spage	16	en
dc.identifier.epage	25	en