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In the present study, the polycyclic aromatic hydrocarbons (PAHs) and soot particulates emitted from a gasoline direct injection (GDI) engine were sampled and analyzed. The results show that the vapor-phase PAHs and particulate-bound PAHs exist in GDI engine exhaust emissions. Soot particles are formed by the agglomeration of the quasi-spherical primary carbon particles, and the size of the PAH cluster...
This study investigated the chemical characteristics of polycyclic aromatic hydrocarbons (PAHs) and soot particulates emitted from a gasoline direct injection (GDI) engine. The microcosmic morphology of the soot particulate and the correlations between PAH species and the primary carbon particles were studied during dynamometer testing of different engine operating conditions using our purpose-built...
To elucidate the evolution process of PAHs (polycyclic aromatic hydrocarbons) in GDI (gasoline direct injection) engines, a reduced chemical model with 17 species and 40 reactions for PAHs formation was developed and integrated into a skeletal TRF (toluene reference fuels) oxidation mechanism to predict PAHs emissions. The final mechanism consisted of 85 species and 232 reactions. The new mechanism...
It is very necessary to develop a comprehensive gasoline surrogate fuel chemical kinetic model that could accurately predict soot emissions and polycyclic aromatic hydrocarbons (PAHs) formation in internal combustion engines. Based on the consideration, this paper presents a toluene reference fuel (TRF) chemical mechanism to predict the PAHs formation process. This mechanism has been validated for...
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