Henry's constants for ethanol, iso-octane and gasoline absorption in engine lubricants

Henry's constants for hydrous ethanol, iso‐octane and gasoline absorption in engine lubricants were determined using gas chromatography. Samples of synthetic SAE 5 W30, synthetic SAE 5 W40, semi‐synthetic SAE 15 W40, mineral SAE 15 W40 and mineral SAE 25 W60 oil were used in the experiments. Fo...

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Bibliographic Details
Published in:Lubrication science 2015-06, Vol.27 (4), p.231-239
Main Authors: de Lima Ribeiro, Kamilla, Sodré, José Ricardo
Format: Article
Language:English
Subjects:
Constants
Engines
Ethanol
Ethyl alcohol
Gasoline
Henry's constant
internal combustion engines
Lubricants
Minerals
Molecular weight
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Summary:Henry's constants for hydrous ethanol, iso‐octane and gasoline absorption in engine lubricants were determined using gas chromatography. Samples of synthetic SAE 5 W30, synthetic SAE 5 W40, semi‐synthetic SAE 15 W40, mineral SAE 15 W40 and mineral SAE 25 W60 oil were used in the experiments. For all lubricants tested, typical molecular weights were considered, ranging from 500 to 5000 kg/kmol. The results show that, for any lubricant, Henry's constant for hydrous ethanol is about 2.2 times higher than that of gasoline, and about 4.3 times higher than that of iso‐octane. Decreasing Henry's constant was observed with increasing lubricant molecular weight, regardless of the fuel type. Copyright © 2014 John Wiley & Sons, Ltd.
ISSN:0954-0075
1557-6833
DOI:10.1002/ls.1272