Characteristics of polycyclic aromatic hydrocarbons emissions of diesel engine fueled with biodiesel and diesel

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• 作者：Chao He ; Yunshan Ge ; Jianwei Tan ; Kewei You ; Xiukun Han ; Junfang Wang
• 关键词：Polycyclic aromatic hydrocarbons ; Emissions ; Biodiesel ; Diesel engine
• 刊名：Fuel
• 出版年：2010
• 出版时间：August 2010
• 年：2010
• 卷：89
• 期：8
• 页码：2040-2046
• 全文大小：848 K

文摘

With mutagenic and carcinogenic potential, polycyclic aromatic hydrocarbons (PAHs) from mobile source exhaust have contributed to a substantial share of air toxics. In order to characterize the PAHs emissions of diesel engine fueled with diesel, biodiesel (B100) and its blend (B20), an experimental study has been carried out on a direct-injection turbocharged diesel engine. The particle-phase and gas-phase PAHs in engine exhaust were collected by fiberglass filters and “PUF/XAD-2/PUF” cartridges, respectively, then the PAHs were determined by a gas chromatograph/mass spectrometer (GC/MS). The experimental results indicated that comparing with diesel, using B100 and B20 can greatly reduce the total PAHs emissions of diesel engine by 19.4 % and 13.1 % , respectively. The Benzo[a]Pyrene (BaP) equivalent of PAHs emissions were also decreased by 15.0 % with the use of B100. For the three fuels, the gas-phase PAHs emissions were higher than particle-phase PAHs emissions and the most abundant PAH compounds from engine exhaust were naphthalene and phenanthrene. The analysis showed that there was a close correlation between total PAHs emissions and particulate matter (PM) emissions for three fuels. Furthermore, the correlation became more significant when using biodiesel.