cetane number

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cetane number

n.
A performance rating for diesel fuels, with a higher number indicating greater fuel efficiency. The number corresponds to the percentage of cetane in a cetane-heptamethylnonane mixture, or (and originally) in a cetane-methylnaphthalene mixture, with the same ignition performance as the fuel being rated. Also called cetane rating.

cetane number

n
(Chemistry) a measure of the quality of a diesel fuel expressed as the percentage of cetane in a mixture of cetane and 1-methylnapthalene of the same quality as the given fuel. Also called: cetane rating Compare octane number

ce′tane num`ber


n.
a measure of the ignition quality of diesel fuel.
[1930–35]
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References in periodicals archive ?
These paraffinic fuels have typically higher cetane numbers and are virtually free from poly-aromatic hydrocarbons (PAH) and sulfur, which cause harmful particulate matter (PM) emissions and faster deterioration of the aftertreatment catalysts respectively [15, 16, 17].
Ryan (III), Cetane Numbers of Branched and Straight-chain Fatty Esters Determined in an Ignition Quality Tester, Fuel, 82, 971 (2003).
The difference in bottom thermal behaviour and thus fuel consumption for RME-diesel mixture, RBE-diesel mixtures and pure diesel is determined by their production technology: the use of alcohols with different cetane numbers for transesterification (Matijosius, Sokolovskij 2009).
Designed as an economical way to provide year-round protection, this product offering includes Diesel Conditioner & Lubricant, a multi-functional fuel additive formulated to clean fuel injectors and provide cold weather and lubricity protection; Diesel Moisture Remover & Emergency Degeller for preventative maintenance against tank moisture buildup or as an emergency additive to dissolve gelled fuel; Diesel Injector Cleaner & Cetane Boost to improve fuel economy and increase cetane numbers while keeping fuel injectors clean; Diesel Conditioner and Anti Gel, to protect against filter plugging/icing and provide lubricity protection and fuel stability; and Diesel Anti Gel for providing maximum protection from cold filter plugging and fuel line freezing.
As it features low cetane numbers, biogas is generally used in spark ignition (SI) engines (Hunt, 2007).
Effect of different cetane numbers on the engine performance and emissions has been investigated for different injection pressure and throttle position.
on-board diagnostic requirements and handling fuels with varying cetane numbers, but Honda plans to have the engine available in the U.
Additives must be added to E diesel to overcome inherent problems such as separation of the ethanol and diesel fuel, reduced lubricity and increased fuel pump wear, loss of cetane numbers and increased corrosion of fuel system components.
Klopfenstein [98] found that for the methyl esters the cetane numbers increased in a nonlinear relation with the chain length of the acid.
Applying the criterion of 16kPa minimum blend DVPE for pure hydrocarbon fuels and 24kPa for fuels containing ethanol indicates that Derived Cetane Numbers as high as 40 should be achievable while maintaining a non-flammable mixture under the assumed design temperature.
The author also carried out tests according to standard EN ISO 5165:1998 which sets up rating the fuel of the compression ignition engine in terms of an arbitrary scale of cetane numbers using a standard single cylinder, 4 stroke engine with variable compression ratio and indirect fuel injection.
Because measuring cetane numbers requires acquiring and maintaining a special Coordinating Fuel Research (CER) test engine, it is a relatively difficult, expensive and sometimes inaccurate process.