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Henry's constants for ethanol, iso‐octane and gasoline absorption in engine lubricants
Author(s) -
Lima Ribeiro Kamilla,
Sodré José Ricardo
Publication year - 2015
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.1272
Subject(s) - gasoline , octane , lubricant , octane rating , chemistry , mineral oil , ethanol , analytical chemistry (journal) , absorption (acoustics) , chromatography , organic chemistry , materials science , composite material
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.