Effects of biodiesel, engine load and diesel particulate filter on nonvolatile particle number size distributions in heavy-duty diesel engine exhaust

中國醫藥大學機構典藏 China Medical University Repository, Taiwan > 公共衛生學院 > 職業安全與衛生學系暨碩士班 > 期刊論文 > Item 310903500/43863

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题名:	Effects of biodiesel, engine load and diesel particulate filter on nonvolatile particle number size distributions in heavy-duty diesel engine exhaust
作者:	楊禮豪(Li-Hao Young)*;(Yi-Jyun Liou);(Man-Ting Cheng);(Jau-Huai Lu);(Hsi-Hsien Yang);(Ying I. Tsai);(Lin-Chi Wang);(Chung-Bang Chen);賴俊雄
贡献者:	公共衛生學院職業安全與衛生學系
关键词:	Diesel engine exhaust;Nonvolatile particles;Number size distribution;Emission control technology
日期:	2012-01
上传时间:	2012-04-18 12:56:20 (UTC+8)
摘要:	Diesel engine exhaust contains large numbers of submicrometer particles that degrade air quality and human health. This study examines the number emission characteristics of 10–1000 nm nonvolatile particles from a heavy-duty diesel engine, operating with various waste cooking oil biodiesel blends (B2, B10 and B20), engine loads (0%, 25%, 50% and 75%) and a diesel oxidation catalyst plus diesel particulate filter (DOC + DPF) under steady modes. For a given load, the total particle number concentrations (NTOT) decrease slightly, while the mode diameters show negligible changes with increasing biodiesel blends. For a given biodiesel blend, both the NTOT and mode diameters increase modestly with increasing load of above 25%. The NTOT at idle are highest and their size distributions are strongly affected by condensation and possible nucleation of semivolatile materials. Nonvolatile cores of diameters less than 16 nm are only observed at idle mode. The DOC + DPF shows remarkable filtration efficiency for both the core and soot particles, irrespective of the biodiesel blend and engine load under study. The NTOT post the DOC + DPF are comparable to typical ambient levels of ∼104 cm−3. This implies that, without concurrent reductions of semivolatile materials, the formation of semivolatile nucleation mode particles post the aftertreatment is highly favored. --------------------------------------------------------------------------------
關聯:	JOURNAL OF HAZARDOUS MATERIALS 199-200:282-289
显示于类别:	[職業安全與衛生學系暨碩士班] 期刊論文

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