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ASTM D6890-13be1

Historical Revision

Standard Test Method for Determination of Ignition Delay and Derived Cetane Number (DCN) of Diesel Fuel Oils by Combustion in a Constant Volume Chamber

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1.1 This automated laboratory test method covers the quantitative determination of the ignition characteristics of conventional diesel fuel oil, oil-sands based fuels, blends of fuel containing biodiesel material, diesel fuel oils containing cetane number improver additives, and is applicable to products typical of ASTM Specification D975 grades No. 1-D and 2-D regular and low-sulfur diesel fuel oils, European standard EN 590, and Canadian standards CAN/CGSB-3.517 and 3.6-2000. The test method may also be applied to the quantitative determination of the ignition characteristics of diesel fuel blending components.

1.2 This test method measures the ignition delay and utilizes a constant volume combustion chamber with direct fuel injection into heated, compressed air. An equation correlates an ignition delay determination to cetane number by Test Method D613, resulting in a derived cetane number (DCN).

1.3 This test method covers the ignition delay range from 3.1 ms to 6.5 ms (64 to 33 DCN). The combustion analyzer can measure shorter and longer ignition delays, but precision may be affected. For these shorter or longer ignition delays the correlation equation for DCN is given in Appendix X2. There is no information about how DCNs outside the 33 to 64 range compare to Test Method D613 cetane numbers.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


5.1 The ID and DCN values determined by this test method can provide a measure of the ignition characteristics of diesel fuel oil in compression ignition engines.

5.2 This test can be used by engine manufacturers, petroleum refiners and marketers, and in commerce as a specification aid to relate or match fuels and engines.

5.3 The relationship of diesel fuel oil DCN determinations to the performance of full-scale, variable-speed, variable-load diesel engines is not completely understood.

5.4 This test may be applied to non-conventional fuels. It is recognized that the performance of non-conventional fuels in full-scale engines is not completely understood. The user is therefore cautioned to investigate the suitability of ignition characteristic measurements for predicting performance in full-scale engines for these types of fuels.

5.5 This test determines ignition characteristics and requires a sample of approximately 100 mL and a test time of approximately 20 min on a fit-for-use instrument.

SDO ASTM: ASTM International
Document Number D6890
Publication Date Oct. 1, 2013
Language en - English
Page Count 17
Revision Level 13be1
Supercedes
Committee D02.01
Publish Date Document Id Type View
Nov. 15, 2022 D6890-22 Revision
July 1, 2021 D6890-21 Revision
Dec. 1, 2018 D6890-18 Revision
April 1, 2016 D6890-16E02 Revision
April 1, 2016 D6890-16E01 Revision
April 1, 2016 D6890-16 Revision
Dec. 1, 2015 D6890-15B Revision
Oct. 1, 2015 D6890-15A Revision
July 1, 2015 D6890-15 Revision
Oct. 1, 2013 D6890-13BE01 Revision
Oct. 1, 2013 D6890-13B Revision
May 1, 2013 D6890-13A Revision
March 1, 2013 D6890-13 Revision
Nov. 1, 2012 D6890-12A Revision
June 1, 2012 D6890-12 Revision
Dec. 1, 2011 D6890-11B Revision
Nov. 15, 2011 D6890-11A Revision
April 1, 2011 D6890-11 Revision
Aug. 1, 2010 D6890-10A Revision
July 1, 2010 D6890-10 Revision
April 15, 2009 D6890-09 Revision
June 1, 2008 D6890-08 Revision
Dec. 1, 2007 D6890-07B Revision
Feb. 15, 2007 D6890-07A Revision
Feb. 1, 2007 D6890-07 Revision
Aug. 1, 2006 D6890-06 Revision
April 1, 2004 D6890-04 Revision
July 10, 2003 D6890-03A Revision
June 10, 2003 D6890-03 Revision