Sooting characteristics of polyoxymethylene dimethyl ether blends with diesel in a diffusion flame

[Display omitted] •Smoke points of diesel/PODEn and other oxygenates were measured in a diffusion flame.•Sooting propensity of all the oxygenated blends exhibited similar results•Oxygen content has limited impact compared to dilution effect for soot suppression•‘Active’ soot suppression species can...

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Bibliographic Details
Published in:Fuel (Guildford) 2018-07, Vol.224, p.499-506
Main Authors: Tan, Yong Ren, Botero, Maria L., Sheng, Yuan, Dreyer, Jochen A.H., Xu, Rong, Yang, Wenming, Kraft, Markus
Format: Article
Language:English
Subjects:
Additives
Alcohols
Butanol
Carbonates
Chains
Chemical compounds
Diesel
Diesel fuels
Diffusion
Diffusion flame
Dilution
Dimethyl ether
Esters
Hydrocarbons
Mixtures
Oxygen
Oxygen content
Oxygenated fuel
PODE
Reduction
Smoke
Smoke point
Soot
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Summary:[Display omitted] •Smoke points of diesel/PODEn and other oxygenates were measured in a diffusion flame.•Sooting propensity of all the oxygenated blends exhibited similar results•Oxygen content has limited impact compared to dilution effect for soot suppression•‘Active’ soot suppression species can explain the sooting tendency of the fuels In this paper, we investigate the sooting propensity of PODEn/diesel blends. The sooting characteristics of PODEn/diesel blends are determined using a standard ASTMD1322 smoke point lamp. The performance of PODEn with different chain length (addition of –CH2O– units) is benchmarked against other oxygenated soot suppression additives, including esters (methyl butyrate), carbonates (dimethyl carbonate) and alcohols (n-butanol). Soot reduction induced by the dilution of the aromatic fraction in the diesel fuel was found to have the biggest impact, followed by soot reduction by decreasing the hydrocarbon chain length and to a lesser extent increasing the oxygen content. The reason for the limited influence of oxygen content on soot suppression was further explored by examining the possible decomposition pathways and products of the different additives.
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2018.03.051