An experimental and numerical study of the effects of dimethyl ether addition to fuel on polycyclic aromatic hydrocarbon and soot formation in laminar coflow ethylene/air diffusion flames

2011 ◽  
Vol 158 (3) ◽  
pp. 547-563 ◽  
Author(s):  
F. Liu ◽  
X. He ◽  
X. Ma ◽  
Q. Zhang ◽  
M.J. Thomson ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Dimethyl Ether ◽  
Diffusion Flames ◽  
Soot Formation ◽  
Numerical Study ◽  
Polycyclic Aromatic ◽  
Air Diffusion

Experimental and numerical study of polycyclic aromatic hydrocarbon formation in ethylene laminar co-flow diffusion flames

Fuel ◽  
2021 ◽  
Vol 289 ◽  
pp. 119931
Author(s):  
Hanfeng Jin ◽  
Junjun Guo ◽  
Tianyu Li ◽  
Zhongyue Zhou ◽  
Hong G. Im ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Diffusion Flames ◽  
Numerical Study ◽  
Polycyclic Aromatic ◽  
Hydrocarbon Formation

Modeling Soot Formation Using Reduced Polycyclic Aromatic Hydrocarbon Chemistry in n-Heptane Lifted Flames With Application to Low Temperature Combustion

2009 ◽  
Vol 131 (3) ◽  
Author(s):  
Gokul Vishwanathan ◽  
Rolf D. Reitz
Keyword(s):  
Low Temperature ◽  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Internal Combustion Engines ◽  
Soot Formation ◽  
Numerical Study ◽  
Low Temperature Combustion ◽  
Temperature Combustion ◽  
Lifted Flames ◽  
Polycyclic Aromatic

A numerical study of in-cylinder soot formation and oxidation processes in n-heptane lifted flames using various soot inception species has been conducted. In a recent study by the authors, it was found that the soot formation and growth regions in lifted flames were not adequately represented by using acetylene alone as the soot inception species. Comparisons with a conceptual model and available experimental data suggested that the location of soot formation regions could be better represented if polycyclic aromatic hydrocarbon (PAH) species were considered as alternatives to acetylene for soot formation processes. Since the local temperatures are much lower under low temperature combustion conditions, it is believed that significant soot mass contribution can be attributed to PAH rather than to acetylene. To quantify and validate the above observations, a reduced n-heptane chemistry mechanism has been extended to include PAH species up to four fused aromatic rings (pyrene). The resulting chemistry mechanism was integrated into the multidimensional computational fluid dynamics code KIVA-CHEMKIN for modeling soot formation in lifted flames in a constant volume chamber. The investigation revealed that a simpler model that only considers up to phenanthrene (three fused rings) as the soot inception species has good possibilities for better soot location predictions. The present work highlights and illustrates the various research challenges toward accurate qualitative and quantitative predictions of the soot for new low emission combustion strategies for internal combustion engines.

Reactive polycyclic aromatic hydrocarbon dimerization drives soot nucleation

2018 ◽  
Vol 20 (16) ◽  
pp. 10926-10938 ◽  
Author(s):  
M. R. Kholghy ◽  
G. A. Kelesidis ◽  
S. E. Pratsinis
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
High Temperatures ◽  
Soot Formation ◽  
Chemical Bonds ◽  
Polycyclic Aromatic ◽  
Negligible Contribution

Nucleation is an important yet poorly understood step in soot formation. Strong chemical bonds between PAH monomers are required as physical dimerization cannot explain soot formation at high temperatures. Dimers can be considered as soot nuclei as larger oligomers have negligible contribution.

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