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http://dx.doi.org/10.7837/kosomes.2021.27.1.179

Study on the Possibility of Recycling Crankcase Soot from Diesel Engine  

Kim, Soo-yang (Korean Register)
Choi, Jae-Hyuk (Division of Marine System Engineering, Korea Maritime and Ocean University)
Rho, Bum-Seok (Korea Institute of Maritime and Fisheries Technology)
Kim, Junsoo (Korea Institute of Maritime and Fisheries Technology)
Kang, Jun (Division of Marine Engineering, Korea Maritime and Ocean University)
Lee, Won-Ju (Division of Marine Engineering, Korea Maritime and Ocean University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.27, no.1, 2021 , pp. 179-186 More about this Journal
Abstract
In this study, we attempted to comparatively analyze the structural characteristics of soot generated from marine engines to review the possibility of recycling crankcase soot by classifying it as exhaust soot and crankcase soot. The annealing procedure was performed in an argon gas atmosphere at 2,000℃ and 2,700℃, and Raman spectroscopy and High-Resolution Transmission Electron Microscopy(HRTEM) were used to analyze the structural properties of the samples. Furthermore, digital image processing techniques were utilized to quantitatively analyze the acquired HRTEM images. The Raman analysis demonstrated a relatively high G/D ratio in the exhaust soot and annealing conditions at 2,700℃. In the HRTEM images, both soot were able to identify similar forms of graphite nanostructures, but there were limitations in that they could not quantitatively derive differences in the degree of graphite depending on the type of soot and annealing temperature. Thus, digital image processing quantitatively analyzed the length and tortuosity of the fringe of the HRTEM image, which is consistent with the Raman analysis. This meant that the exhaust soot had a more graphite structure than the crankcase soot, and that annealing at a higher temperature improved the graphite structure. This study confirmed that both the crankcase soot and exhaust soot can be recycled as a graphite materials.
Keywords
Exhaust soot; Crankcase soot; Annealing; Raman spectroscopy; HRTEM; Digital image processing;
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