octane number


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Related to octane number: cetane number, Research octane number

octane number

n.
A numerical representation of the antiknock properties of motor fuel, compared with a standard reference fuel, such as isooctane, which has an octane number of 100. Also called octane rating.

octane number

or

octane rating

n
(Chemistry) a measure of the quality of a petrol expressed as the percentage of isooctane in a mixture of isooctane and n-heptane that gives a fuel with the same antiknock qualities as the given petrol

oc′tane num`ber


n.
a designation of antiknock quality of gasoline, numerically equal to the percentage of isooctane by volume in a mixture of isooctane and normal heptane that matches the given gasoline in antiknock characteristics. Also called oc′tane rat`ing.
[1930–35]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.octane number - a measure of the antiknock properties of gasoline
quantity, measure, amount - how much there is or how many there are of something that you can quantify
Translations

octane number

, octane rating
nOktanzahl f
References in periodicals archive ?
The specification also talks about the chemical and physical requirements of petrol such as the limits of octane number and allowed limits of heavy metals such as lead, manganese, sulphur, iron etc.
"The unleaded gasoline is classified according to the octane number to excellent which has octane 95 and normal gasoline which has octane 91," she said.
Such sacrifices can be avoided if a higher octane number fuel, which is less prone to knock, is used.
Research Octane Number (RON) is an indication of quality of fuel and generally fuel with higher RON is supposed to be cleaner and of better quality.
Out of which, the private sector companies imported around 38 percent petroleum products including High Speed Diesel (HSD), High Sulphur Fuel Oil and Low Sulphur Fuel Oil (HSFO/LSFO), Jet Fuel, Motor Gasoline (Mogas), RON (Research Octane Number) 95 and 97 under testing mechanism notified by OGRA, according to the official data available with reporter.
The inspection showed that this shipment octane number is 89.5 and not 90 as required in the tender conditions.
The gasoline prices of leading oil firm Petron Corporation - depending on octane number or the measure of knock resistance of gasoline - had been hovering at P47.29 to P57.84 per liter; its diesel prices at P42 to P44.99 per liter; and kerosene at P45.17 to P53.31 per liter.
On average a single drop of MMT in a litre of fuel can increase the octane number by two.
Honda's complaint stated Pakistani suppliers used the additive to elevate the Research Octane Number (RON) used to grade petroleum and lower quality fuel up to the RON 92 grade required by regulatory standards.
The gasoline whose octane number stand at 96 also helps reduce nitrogen oxide emissions and lessens its contribution to ground-level ozone.
The company says that the chemical engineering expertise at its Innovation Centre in Westbury, Quebec, allowed it to successfully develop a process that utilises its proprietary waste-to-biofuel technology to produce a new biofuel with a Research Octane Number (RON) of up to 112.