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A comparative study of particle size distribution
from two oxygenated fuels and diesel fuel |
| Xiaoyan SHI1,Kebin HE1,Jie ZHANG1,Yongliang MA1,Yunshan GE2,Jianwei TAN2, |
| 1.Department of Environmental
Science and Engineering, Tsinghua University, Beijing 100084, China; 2.National Laboratory
of Auto Performance and Emission Test, Beijing Institute of Technology,
Beijing 100081, China; |
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Abstract Oxygenated fuels are known to reduce particulate matter (PM) emissions from diesel engines. In this study, 100% soy methyl ester (SME) biodiesel fuel (B100) and a blend of 10% acetal denoted by A-diesel with diesel fuel were tested as oxygenated fuels. Particle size and number distributions from a diesel engine fueled with oxygenated fuels and base diesel fuel were measured using an Electrical Low Pressure Impactor (ELPI). Measurements were made at ten steady-state operational modes of various loads at two engine speeds. It was found that the geometric mean diameters of particles from SME and A-diesel were lower than that from base diesel fuel. Compared to diesel fuel, SME emitted more ultra-fine particles at rated speed while emitting less ultra-fine particles at maximum speed. Ultra-fine particle number concentrations of A-diesel were much higher than those of base diesel fuel at most test modes.
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| Keywords
oxygenated fuel
diesel particulate matter
particle size distribution
biofuel
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Issue Date: 05 March 2010
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