Journal
ENERGY & FUELS
Volume 24, Issue 12, Pages 6576-6585Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ef101125c
Keywords
-
Categories
Ask authors/readers for more resources
When expressed using volumetric concentrations (as is industry practice), the addition of relatively small amounts of ethanol or methanol (e.g., 10% by volume) to gasoline appears to result in disproportionately large, nonlinear increases in research octane number (RON) and motor octane number (MON). As a result, volumetric blending octane numbers are of limited value for estimating the octane number of alcohol-gasoline blends because they vary with alcohol content and base gasoline composition. We show that RON and MON increases with alcohol content are approximately linear when expressed using molar concentrations. Moreover, molar-based blending octane numbers are effectively equal to the octane numbers of the pure alcohols for most base gasolines. A limited dependence on gasoline composition was observed, namely, greater-than-predicted octane numbers for ethanol-gasoline blends with unusually high isoparaffin content. We suggest that octane numbers of methanol-gasoline and ethanol-gasoline blends can be estimated conveniently and more accurately from their molar composition by linear interpolation between the octane numbers of the base gasoline and the pure alcohol.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available