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PAH and Soot Formation Characteristics of DME/Ethylene Fuel  

Yoon, Seung-Suk (서울대학교 기계공학부)
Lee, Sang-Min (한국기계연구원)
Chung, Suk-ho (서울대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.13, no.3, 2005 , pp. 171-177 More about this Journal
Abstract
In order to investigate the effect of dimethyl ether (DME) on PAH and soot formation, the fuel has been mixed to the counter-flow diffusion flames of ethylene. Laser-induced incandescence and laser-induced fluorescence techniques were employed to measure relative concentrations of soot volume fraction and polycyclic aromatic hydrocarbon (PAH) concentration, respectively. Results showed that even though pure DME flame produces the minimal amount of PAH and soot, the mixture fuel of DME and ethylene could increase PAH and soot formation, as compared to those of pure ethylene flame. This implies that even though DME has been known to be a clean fuel for soot formation, the mixture fuel of DME and the hydrocarbon fuel could produce enhanced production of soot. Numerical simulation demonstrated that methyl (CH$_{3}$) radical generated by the initial pyrolysis of DME can be contributed to the enhancement of PAH and soot formation, through the formation of propargyl (C$_{3}$H$_{3}$) radical.
Keywords
매연;다환방향족 탄화수소;디메틸에테르;레이저유도백열법;레이저유도형광법;
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