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  • BSI
    BS EN ISO 4264:2018, BS 2000-380:2018 Petroleum products. Calculation of cetane index of middle-distillate fuels by the four variable equation
    Edition: 2018
    $316.70
    / user per year

Description of BS EN ISO 4264:2018 2018

This document specifies a procedure for the calculation of the cetane index of middle-distillate fuels from petroleum-derived sources. The calculated value is termed the “cetane index by four-variable equation”. Throughout the remaining text of this document, the term “cetane index” implies cetane index by four-variable equation.

This document is applicable to fuels containing non-petroleum derivatives from tar sand and oil shale. It is not applicable to pure hydrocarbons, nor to distillate fuels derived from coal. Cetane index calculations do not take into account the effects from additives used to enhance the Cetane number.

NOTE 1 This document was originally developed using a matrix of fuels, some of which contain non-petroleum derivatives from tar sands and oil shale.

NOTE 2 The cetane index is not an alternative way to express the cetane number; it is a supplementary tool, to be used with due regard for its limitations.

NOTE 3 The cetane index is used to estimate the cetane number of diesel fuel when a test engine is not available to determine this property directly, or when insufficient sample is available for an engine rating.

The most suitable range of fuel properties for application of this document is as follows:

Fuel property Range
Cetane number 32,5  to 56,5
Density at 15 °C, kg/m3 805,0 to 895,0
10 % (V/V) distillation recovery temperature, °C 171 to 259
50 % (V/V) distillation recovery temperature, °C 212 to 308
90 % (V/V) distillation recovery temperature, °C 251 to 363

Within the range of cetane number (32,5 to 56,5), the expected error of the prediction via the cetane index equation will be less than ±2 cetane numbers for 65 % of the distillate fuels examined. Errors can be greater for fuels whose properties fall outside this range of application.

As a consequence of sample-specific biases observed, the expected error can be greater even when the fuel’s properties fall inside the recommended range of application. Therefore, users can assess the required degree of prediction agreement to determine the fitness-for-use of the prediction.

NOTE 4 Sample specific biases were observed for distillate fuels containing FAME (fatty acid methyl ester).



Standard NumberBS EN ISO 4264:2018, BS 2000-380:2018
TitlePetroleum products. Calculation of cetane index of middle-distillate fuels by the four variable equation
StatusDefinitive
Publication Date2018-07-24
ReplacesBS EN ISO 4264:2007+A1:2013
Identical National Standard OfISO 4264:2018, EN ISO 4264:2018
DescriptorsLiquid fuels, Petroleum, Cetane number, Cetane, Density, Mathematical calculations, Distillation methods of analysis, Fuels, Petroleum products
ICS75.160.20 Liquid fuels
CommitteePTI/13
ISBN978 0 580 98026 8
PublisherBSI
Pages16

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About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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