期刊
FUEL
卷 169, 期 -, 页码 111-119出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2015.12.014
关键词
Soot; Surrogate fuel; Smoke point; Particle size distribution; Particle morphology
资金
- Administrative Department of Science, Technology and Innovation of Colombia
- National Research Foundation (NRF), Prime Minister's Office, Singapore
- EPSRC [EP/I01165X/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I01165X/1] Funding Source: researchfish
The sooting characteristics of binary mixtures of n-heptane and toluene and a commercial gasoline were studied. The experiment involves the non-premixed combustion of the fuel in wick-fed burner. The particle size distributions (PSDs) of soot were measured at the tip of flames of different heights, using a differential mobility spectrometer (DMS). Transmission electron microscopy (TEM) was used to investigate the morphology of the particles formed. Pure n-heptane and toluene were studied along with blends of 10%, 30%, and 50% by volume of toluene in n-heptane. The addition of toluene to heptane shifts the PSD to larger diameters. As toluene is added to n-heptane the dependence of soot particle size on flame height changes from resembling a paraffinic to resembling an aromatic fuel in a non-linear fashion. A tolerance to toluene addition at the lowest flow rates was found, where particles were not detected. A commercial gasoline with approximately 44% by mass of aromatics was also analysed. The smoke point and PSDs are similar to the mixture 50% toluene 50% n-heptane, but the mean aggregate mobility size, number of particles and primary particle size formed by the gasoline are smaller. (C) 2015 Elsevier Ltd. All rights reserved.
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