Dec
20
machman4 asked:
I’m doing a science project on combustion of different grades of gasoline, but can’t seem to find anything on what percent of it is octane. I found one site, but it was contradicting saying (for example) 87 gas was 87% octane, but then says that the 87 is a compression rating. Anyone know how to find the percent of octane in a fuel?
RICH
I’m doing a science project on combustion of different grades of gasoline, but can’t seem to find anything on what percent of it is octane. I found one site, but it was contradicting saying (for example) 87 gas was 87% octane, but then says that the 87 is a compression rating. Anyone know how to find the percent of octane in a fuel?
RICH
Comments
One Response to “What are the chemicals in unleaded gasoline?”
octane rating isn’t the percent of octane. it is a ratio of detonation resistance to that of iso-octane. Ie, the fuels tendency to burn as smoothly as iso-octane, rather than to explode.
read about it here
as to the chemicals in gasoline, they are many. benzene, toluene, ethanol, MTBE, etc
**** update ****
the concentration of isooctane varies and is independant of the octane rating.
87 octane gas does not mean it’s 87 % octane
1 gallon of 87 octane will contain a different % octane than a different gallon of 87 octane
look here
2,2,4 trimethylpentane is isooctane. the % isooctane can vary between APPROXIMATELY 0 to 30%.
ok? there is NO WAY to take an octane rating off the pump and calculate the % isooctane in the gas.