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© 2020. This work is published under https://creativecommons.org/licenses/by-sa/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Non-volatile particle emissions from a marine engine fueled by either diesel or natural gas (NG) blended with diesel pilot gas were investigated via transmission electron microscopy (TEM). The most common particles (> 95% by number) were soot aggregates. These “typical” aggregates exhibited primary particle diameters of 20.7 ± 1.9 and 26.9 ± 1.7 for 100 nm aggregates when diesel and NG fuel were used, respectively. Highly non-uniform aggregates, with distinct groups of smaller and larger monomers, were visible in all of the samples but occurred most frequently with diesel fueling at high loads. The observed “atypical” particles included super-aggregates, small compact aggregates, spheres, mineral-like polyhedral particles, and fibers. Such particles, although rare (averaging 3% by number, as calculated by counting the number of particles for each type depicted in all of the collected images), were found in most of the samples and could have been produced by a variety of mechanisms. For instance, the spheres (approximately 300 nm in diameter) most likely arose from metals within the lubricating oil.

Details

Title
Typical and Atypical Morphology of Non-volatile Particles from a Diesel and Natural Gas Marine Engine
Author
Baldelli, Alberto; Trivanovic, Una; Corbin, Joel C; Lobo, Prem; Gagné, Stephanie; Miller, J Wayne; Kirchen, Patrick; Rogak, Steven
Publication year
2020
Publication date
Apr 2020
Publisher
Taiwan Association of Aerosol Research
ISSN
16808584
e-ISSN
20711409
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2645206949
Copyright
© 2020. This work is published under https://creativecommons.org/licenses/by-sa/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.