國家衛生研究院 NHRI:Item 3990099045/2565

NHRI > National Institute of Environmental Health Sciences > Dennis P.H. Hsieh(2004-2007) > Periodical Articles > Item 3990099045/2565

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Title:	Characteristics of trans,trans-2,4-decadienal and polycyclic aromatic hydrocarbons in exhaust of diesel engine fueled with biodiesel
Authors:	Yang, HH;Lo, MY;Lan, JCW;Wang, JS;Hsieh, DPH
Contributors:	Division of Environmental Health and Occupational Medicine
Abstract:	The use of biodiesel fuel as a substitute for fossil fuel in diesel engines has received increasing attention in recent years.. This study is the first to investigate and compare the characteristics of mutagenic species, trans, trans-2,4-decadienal (tt-DDE), and polycyclic aromatic hydrocarbons (PAHs) in the diluted exhaust of diesel engines operated with diesel and biodiesel blend fuels. An engine of current design was operated on a dynamometer consistent with the US federal test procedure transient-cycle specifications. Petroleum diesel and a blend of petroleum diesel and biodiesel (B20) were tested. Exhaust sampling was carried out on diluted exhaust in a dilution tunnel with a constant-volume sampling system. Concentrations of tt-DDE and PAHs were analyzed by GC/MS. Although average PAH emission factors decreased from 1403 to 1051 mu g bhp-h(-1), the results show that tt-DDE is evidently generated (1.28 mu g bhp-h(-1)) in the exhaust of diesel engine using B20 as fuel. This finding suggests that tt-DDE emission from the use of biodiesel should be taken into account in characterization and health-risk assessment. The results also show that tt-DDE is depleted in the diesel engine combustion process and the existence of tt-DDE in biodiesel is the major source of tt-DDE emission. The distribution of tt-DDE in the particulate phase is 55.3% under this study's sampling conditions. For diesel and B20, PAH phase distributions have similar trends. Lower molecular weight PAHs predominate in gaseous phase for both diesel and B20. Cold-start driving has higher tt-DDE and PAH emission factors, as well as a higher percentage of tt-DDE in particulate phase, than for warm-start driving. (C) 2007 Elsevier Ltd. All rights reserved.
Keywords:	Environmental Sciences;Meteorology & Atmospheric Sciences
Date:	2007-05
Relation:	Atmospheric Environment. 2007 May;41(16):3373-3380.
Link to:	http://dx.doi.org/10.1016/j.atmosenv.2006.12.028
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=1352-2310&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000246430000008
Cited Times(Scopus):	http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=34047208686
Appears in Collections:	[Dennis P.H. Hsieh(2004-2007)] Periodical Articles

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