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论述了两种可溶有机组分含量(8w %,25w %)的柴油机油烟的燃烧机理。采用加热速率5℃ min～20℃ min非等温条件下的热重分析(TGA),考察了其在空气中的燃烧。应用Ozawa Flynn Wall方法,研究了析出物质的数据资料,并由复变非线性回归方法获得了各动力学参数。两种油烟的析出可根据三段机理予以模定,即:(1)可溶有机组分(SOF)的蒸发,(2)SOF热裂解,(3)炭基质燃烧。由于两种油烟所得的动力学参数非常近似,表明SOF含量对基质燃烧的影响极其有限。
The combustion mechanism of diesel fumes with two soluble organic components (8w%, 25w%) is discussed. Thermal gravimetric analysis (TGA) at a heating rate of 5 ℃ min ~ 20 ℃ min under non-isothermal conditions was used to investigate the combustion in air. Ozawa Flynn Wall method was used to study the precipitation data and the kinetic parameters were obtained by the complex nonlinear regression method. The two fumes can be modeled according to the three-stage mechanism, namely: (1) evaporation of soluble organic components (SOF), (2) SOF pyrolysis, and (3) char combustion. Since the kinetic parameters obtained for both soots are very similar, it shows that SOF content has a very limited effect on the combustion of the substrate.