what is octane number
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a figure indicating the antiknock properties of a fuel , based on comparison with a mixture of isoctane and heptane
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Answer:-
Octane Number:- It is a scale by which quality of a fuel is determined of an internal engine. As standard in this two pure carbons are selected.
Explanation:-
Octane Number can be increased by:-
- Aromatization
- Cracking
- Isomerization
Some antiknocking agents are:-
- By addition of some gasoline compounds which is to be capable of reduce knocking.
- By using those fuels which have high octane number.
Some important points:-
- Straight Chain Hydrocarbons like n-heptane knocks very badly that's why it has octane number 0.
- There are some branched Hydrocarbons which have good antiknocking property like like Iso-octane and which will have very high octane number i.e. 100.
- On increasing the length of the chain octane Number will decrease.
- While on increasing branches octane number will increase.
- The sequence for the octane number will be as Aromatic compound > cycloalkane > olefins > branched chain alkane > straight chain alkane.
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