Abstract This research focuses on the diesel and diesel/oil mixed fuel combustion particles as the research object and analyzes the characteristics of the two kinds of fuel oil under different parameters. The characteristics of the combustion particulate matter in the DPF discharge of the two fuels before and after carrying out TEM imaging of the sample particles were studied. The TEM image was obtained, and the morphology characteristics, level spacing, crystallite size, and curvature were discussed. The microstructure characteristics of the particulate samples were determined with Raman spectroscopy to analyze the degree of graphitization of the particulate matter. The results show that, during combustion, the lubricating oil is easily cracked to produce insoluble particles, sulfate and ash. The insoluble particles tend to saturate and condense into nuclei during the exhaust and dilution processes, which leads to an increase in the modal accumulation particles. The combustion of the lubricating oil has a great influence on the working efficiency of the DPF posttreatment system.

中文翻译：

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润滑油与柴油混合燃烧对颗粒物氧化及微物理性质的影响

摘要 本研究以柴油和柴油/油混合燃料燃烧颗粒为研究对象，分析了两种燃料油在不同参数下的特性。研究了对样品颗粒进行TEM成像前后两种燃料DPF放电燃烧颗粒物的特性。获得TEM图像，并讨论了形貌特征、水平间距、微晶尺寸和曲率。通过拉曼光谱测定颗粒样品的微观结构特征，分析颗粒物质的石墨化程度。结果表明，润滑油在燃烧过程中容易裂化，产生不溶性颗粒、硫酸盐和灰分。在排气和稀释过程中，不溶性颗粒趋于饱和并凝结成核，这导致模态积累颗粒的增加。润滑油的燃烧对DPF后处理系统的工作效率影响很大。