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International Journal of Automotive Technology > Volume 7(4); 2006 > Article
International Journal of Automotive Technology 2006;7(4): 501-508.
MODELLING STUDY OF THE EFFECT OF CHEMICAL ADDITIVES ON SOOT PRECURSORS REDUCTION
J. K. PARK
Konkuk University
ABSTRACT
The effect of chemical additives, such as dimethyl ether (DME), ethanol, carbon disulfide on the soot formation were examined numerically. In this study, the Frenklach soot mechanism was used as a base mechanism to predict the soot formation in the ethane flame. The combination of Westbrook’s DME mechanism, Marinov’s ethanol mechanism, and chemical kinetic mechanism for hydrogen sulfide and carbon disulfide flames was made with the base mechanism because the DME, ethanol, CS2 additives are added into the ethane fuel. CHEMKIN code was used as a numerical analysis software to simulate the effect of chemical additives on reduction of the polycyclic aromatic hydrocarbons (PAH’s) which are soot precursors. From the numerical results it is observed that addition of DME, ethanol and CS2 into ethane fuel can reduce PAH species significantly. That means theses additives can reduce soot formation significantly. Results also strongly suggest suppression of soot formation by these additives to be mainly a chemical effect. H and OH radicals may be the key species to the reduction of PAH species for additives.
Key Words: Soot, Chemical additives, Polycyclic aromatic hydrocarbon (PAH), Dimethyl ether (DME), Ethanol, Carbon disulfide
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