title: [Particle emission characteristics of diesel bus fueled with bio-diesel].
abstract: With the use of the Engine Exhaust Particle Sizer (EEPS), a study on the characteristics of particle emissions was carried out on a China-IV diesel bus fueled with blends of 5% , 10% , 20% , 50% bio-diesel transformed from restaurant waste oil and China-IV diesel (marked separately by BD5, BD10, BD20, BD50), pure bio-diesel (BD100) and pure diesel (BD0). The results indicated that particulate number (PN) and mass (PM) emissions of bio-diesel blends increased with the increase in bus speed and acceleration; with increasing bio-diesel content, particulate emissions displayed a relevant declining trend. In different speed ranges, the size distribution of particulate number emissions (PNSD) was bimodal; in different acceleration ranges, PNSD showed a gradual transition from bimodal shape to unimodal when bus operation was switched from decelerating to accelerating status. Bio-diesel blends with higher mixture ratios showed significant reduction in PN emissions for accumulated modes, and the particulate number emission peaks moved towards smaller sizes; but little change was obtained in PN emissions for nuclei modes; reduction also occurred in particle geometric diameter (Dg).
authors.affiliation: School of Automotive Studies, Tongji University, Shanghai 201804, China. loudiming@tongji.edu.cn
authors.forename: Di-Ming
authors.initials: DM
authors.lastname: Lou
authors.affiliation: School of Automotive Studies, Tongji University, Shanghai 201804, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Chen
authors.affiliation: School of Automotive Studies, Tongji University, Shanghai 201804, China.
authors.forename: Zhi-Yuan
authors.initials: ZY
authors.lastname: Hu
authors.affiliation: School of Automotive Studies, Tongji University, Shanghai 201804, China.
authors.forename: Pi-Qiang
authors.initials: PQ
authors.lastname: Tan
authors.affiliation: School of Automotive Studies, Tongji University, Shanghai 201804, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Hu
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D056804:Biofuels / Q000032:analysis*; D002681:China; D005742:Gasoline / Q000032:analysis; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis*; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D056804:Biofuels; D005742:Gasoline; D052638:Particulate Matter; D001335:Vehicle Emissions