Effect of Waste Cooking Oil Biodiesel on the Properties of Particulate from a DI Diesel Engine

The present work focuses on the effect of waste cooking oil biodiesel on the particulate mass, number concentration, nanostructure, and oxidative reactivity under different engine speeds and engine loads. Particulate samples were collected from the diluted exhaust of a medium-duty direct injection d...

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Bibliographic Details
Published in:Aerosol science and technology 2015-04, Vol.49 (4), p.199-209
Main Authors: Man, X. J., Cheung, C. S., Ning, Z., Yung, K. F.
Format: Article
Language:English
Subjects:
Aerosols
Biodiesel
Biodiesel fuels
Chemical reactions
Cooking
Diesel engines
Diesel fuels
Engines
Heating
Nanostructure
Nanostructured materials
Physical chemistry
Soot
Thermogravimetric analysis
Transmission electron microscopy
Vehicle emissions
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Summary:The present work focuses on the effect of waste cooking oil biodiesel on the particulate mass, number concentration, nanostructure, and oxidative reactivity under different engine speeds and engine loads. Particulate samples were collected from the diluted exhaust of a medium-duty direct injection diesel engine and were used to analyze the physico-chemical properties via the transmission electron microscope (TEM) and the thermogravimetric analyzer/differential scanning calorimeter (TGA/DSC). The TEM images reveal that smaller primary particles are formed at higher engine speed, lower engine load, or using biodiesel. Quantitative analysis of the nanostructures indicates more soot with more disordered configuration, in which shorter and more curved graphene layer is prevailing at lower engine load or when using biodiesel. Furthermore, the TGA results infer that the soot oxidative reactivity is closely related to the nanostructure properties and the effect of engine load is more pronounced than the effect of engine speed. Also biodiesel soot has faster oxidative reactivity than diesel soot. Moreover, results obtained for B30 (30% biodiesel and 70% diesel fuel) lie in between those for biodiesel and diesel fuel. Copyright 2015 American Association for Aerosol Research
ISSN:0278-6826
1521-7388
DOI:10.1080/02786826.2015.1016214