0 a number showing the quality of petrol by representing how well and with how much power it can make an engine work --
The research octane numbers in this specification have remained unchanged with the reduction of the lead alkyl content.
Isobutane is primarily used by refineries to enhance (increase) the octane number of motor gasoline.
The degree of branching affects characteristics, such as the octane number or cetane number in petroleum chemistry.
Where the octane number is raised by blending in ethanol, energy content per volume is reduced.
The higher the octane number, the more compression the fuel can withstand before detonating (igniting).
Alkylation processes transform low molecular-weight alkenes and iso-paraffin molecules into larger iso-paraffins with a high octane number.
Both of these processes raise the octane number of the substance.
The octane number of the alkylate depends mainly upon the kind of alkenes used and upon operating conditions.
