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?
I know that. What I need to find out IS the percentage of octane. If anyone knows, help!
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?
I know that. What I need to find out IS the percentage of octane. If anyone knows, help!
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.