Journal
TRIBOLOGY INTERNATIONAL
Volume 44, Issue 12, Pages 1642-1650Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2011.06.002
Keywords
Oil Analysis; Lubricant; ASTM 5967; Soot in Oil
Categories
Funding
- Australian Research Council [LP0883877]
- MANN + HUMMEL GmbH
- Fuels and Energy Technology Institute, Curtin University
- Australian Research Council [LP0883877] Funding Source: Australian Research Council
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This work examined the thermal behaviour of diesel engine produced soot and commercial carbon black using thermogravimetric analysis (TGA). It was found that during TGA analysis of the carbon matrices (at a temperature range commonly used for soot-in-oil content determination), a gradual mass loss occurred. This was attributed to pyrolysis effects and combustion processes occurring due to poor hydrodynamic design of some commercial thermobalances. This process resulted in a significant mass loss of the carbon during TGA. This finding may strongly effect soot-in-oil analysis conducted using current methods. Experiments were conducted using a range of soot-in-oil mixtures according to the widely used thermogravimetric standard method ASTM 5967-08 which showed a significant underestimation of the soot content in the oil as a result of carbon mass loss due to combustion and/or pyrolysis effects. An improved oil analysis method is proposed which provides a significantly increased accuracy of soot determination in lubricant oils. (C) 2011 Elsevier Ltd. All rights reserved.
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