cetane

a colourless insoluble liquid alkane hydrocarbon used in the determination of the cetane number of diesel fuel. Formula: C₁₆H₃₄

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

cetane

[′sē‚tān]

(organic chemistry)

n-hexadecane

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Cetane

(also n-hexadecane), the saturated hydrocarbon CH₃(CH₂)₁₄CH₃. A colorless liquid, cetane has a melting point of 18.2°C, a boiling point of 286.8°C, and a density of 0.770 g/cm₃ at 25°C. Insoluble in water, it is soluble in benzene, hot absolute ethanol, ether, and other organic solvents. Cetane is produced by various methods, such as heating n-octyl bromide together with sodium (seeWURTZ REACTION). Cetane is used as a standard for measuring the quality of diesel fuel (see).

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1981) containing yeast extract (3 g/L) and hexadecane (20 mL/L).

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The new fluid supersedes the previous Standard Reference Material 1490 Non-linear Fluid Standard, which was composed of a high-molecular-mass polyisobutylene dissolved in normal hexadecane. The new standard fluid SRM 2490 consists of a similar high-molecular-mass polyisobutylene dissolved in 2,6,10, 14-tetramethylpentadecane (common name pristane).

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Prior studies by Landman and his colleagues found that a waxy lubricant such as hexadecane would separate into four or five stable, motion-resistant layers, but only if the size of the gap filled by the lubricant remained fixed.

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A thin film of hexadecane, a hydrocarbon lubricant, was introduced into the simulation.

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Category Main components Aromatic hydrocarbons Ethylbenzene, 1,3-dimethyl benzene, 1-methylene lH-indene, butylated hydroxy toluene, 1-methylnaphthalene, 2-methylnaphthalene Alkanes Undecane, dodecane, tridecane, tetradecane, pentadecane, hexadecane, 2,6,10-trimethyl dodecyl, 4-(prop-2 loxypropangl)octane, 2,6-dimethyl decane Alkenes 2-Propenylidene cyclobutene, cedrene, Seychelles alkene Aldehydes and ketones Hexanal, nonanal, benzaldehyde, acetophenone, undecanal Esters Butyl butyrate, 3-methyl heptanol acetate, 2 acrylic acid 2 ethylhexyl ester, oxalic acid acrylate Others TV-butyl ether

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2), including 11 different hydrocarbons (no-nane 3.23%, decane 1.61%, limonene 9.08%, dodecane 5.44%, tetradecane 7.83%, dotriacontane 9.25%, ethylbenzene 2.70%, 1,3-dimethyl benzene 5.70%, biphenyl 7.97%, octane 1.58%, and hexadecane 11.39%), 2 alcohols (dimethyl hexadecanol 2.18% and borneol 16.02%), and 1 aldehyde (nonaldehyde 16.05%).

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