TEM and HRTEM of Soot-in-oil particles and agglomerates from internal combustion engines

Electron Microscopy and Analysis Group Conference 2013

Fay, M.W.^1,2 ; La Rocca, A.^2 ; Shayler, P.J.^2

Nottingham Nanotechnology and Nanoscience Centre, University of Nottingham, Nottingham NG7 2RD, United Kingdom^1

Department of Mechanical, Materials and Manufacturing Engineering, Faculty of Engineering, University of Nottingham, University Park, NG7 2RD Nottingham, United Kingdom^2

关键词: Agglomerated particles;    Centrifugation technique;    Combustion pro-cess;    Diesel exhausts;    High-resolution imaging;    Nanostructure morphologies;    Oil contaminants;    Primary particles;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/522/1/012072/pdf
DOI  :  10.1088/1742-6596/522/1/012072

来源: IOP

【 摘 要 】

Over time, the performance of lubricating oil in a diesel engine is affected by the build-up of carbon soot produced by the combustion process. TEM and HRTEM are commonly used to investigate the characteristics of individual and agglomerated particles from diesel exhaust, to understand the structure and distribution of the carbon sheets in the primary particles and the nanostructure morphology. However, high resolution imaging of soot-in-oil is more challenging, as mineral oil is a contaminant for the electron microscope and leads to instability under the electron beam. In this work we compare solvent extraction and centrifugation techniques for removing the mineral oil contaminant, and the effect on particle size distribution.