Impact of lubricating oil combustion on nanostructure, composition and graphitization of diesel particles

被引:50
作者
Wang, Yuesen [1 ,4 ]
Liang, Xingyu [1 ]
Tang, Gong [2 ,5 ]
Chen, Yu [2 ,5 ]
Dong, Lihui [3 ]
Shu, Gequn [1 ]
机构
[1] Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China
[2] MIT, Sloan Automot Lab, 77 Massachusetts Ave, Cambridge, MA 02139 USA
[3] Civil Aviat Univ China, Sch Aeronaut Engn, 2898 Dongli, Tianjin 300300, Peoples R China
[4] Tianjin Univ, Room 204,Neiranji Bldg,92 Weijin Rd, Tianjin 300072, Peoples R China
[5] MIT, Room 203,Bldg 41,77 Massachusetts Ave, Cambridge, MA 02139 USA
基金
中国国家自然科学基金;
关键词
Lubricating oil; Diesel particles; Transmission electron microscopy; Raman spectrum; Thermogravimetric analysis; ENGINE OPERATING-CONDITIONS; PARTICULATE MATTER; SIZE DISTRIBUTION; MORPHOLOGY; EXHAUST; SOOT; MICROSTRUCTURE; EMISSION;
D O I
10.1016/j.fuel.2016.11.021
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
In this study, the impact of lubricating oil on the nanostructure, composition, and graphitization of diesel particles is studied experimentally. A 4-cylinder turbocharged light-duty diesel engine was used to generate particle samples. In the analysis, high resolution transmission electron microscopy (HRTEM) and thermogravimetric analysis (TGA) were applied to study the nanostructure and the compositions of particles, respectively. Furthermore, Raman spectroscopy was used to compare the graphitization of particles. Quantitative analysis of HRTEM images suggests that lube oil-derived particles have more disordered structures with shorter fringe length, larger degree of tortuosity, and greater separation distance than diesel particles. TGA results indicate that lubricating oil leads to more low volatility volatile fraction in PMs, particularly at the low load conditions. From Raman spectrum, it has been found that there are more defective band appeared in lube oil-derived particles. This implies that the lube oilderived particles have a lower degree of graphitization. Overall, this study shows that lubricating oil has a significant impact on the characteristics of particles. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:237 / 244
页数:8
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