1、Governmentof CanadaCanadian GeneralStandards BoardExperience and excellenceExprience et excellenceGouvernementdu CanadaOffice des normesgnrales du Canada CAN/CGSB-3.0 No. 20.9-2005 Supersedes CAN/CGSB-3.0 No. 20.9-95 Methods of Testing Petroleum and Associated Products CGSB Cetane Index of Diesel Fu
2、els ICS 71.040.40 National Standard of Canada Copyright Canadian General Standards Board Provided by IHS under license with CGSBNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-The CANADIAN GENERAL STANDARDS BOARD (CGSB), The STANDARDS COUNCIL OF CANADA is the co-or
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16、 it is important to note that it remains theK1P 6N7responsibility of the users of the standard to judge its suitabilityfor their particular purpose.The testing and evaluation of a product against this standard mayrequire the use of materials and/or equipment that could behazardous. This document doe
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21、da on the Web www.ongc-cgsb.gc.caK1A 1G6Copyright Canadian General Standards Board Provided by IHS under license with CGSBNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NATIONAL STANDARD OF CANADA CAN/CGSB-3.0 No. 20.9-2005 Supersedes CAN/CGSB-3.0 No. 20.9-95 METH
22、ODS OF TESTING PETROLEUM AND ASSOCIATED PRODUCTS CGSB CETANE INDEX OF DIESEL FUELS Prepared by the Approved by the Canadian General Standards Board Standards Council of Canada Published July 2005 by the Canadian General Standards Board Gatineau, Canada K1A 1G6 HER MAJESTY THE QUEEN IN RIGHT OF CANAD
23、A as represented by the Minister of Public Works and Government Services, the Minister responsible for the Canadian General Standards Boad, (2005) No part of this publication may be reproduced in any form without the prior permission of the publisher. Copyright Canadian General Standards Board Provi
24、ded by IHS under license with CGSBNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Acknowledgment is made for the translation of this National Standard of Canada by the Translation Bureau of Public Works and Government Services Canada. CAN/CGSB-3.0 No. 20.9-2005 CAN
25、ADIAN GENERAL STANDARDS BOARD COMMITTEE ON PETROLEUM TEST METHODS (Membership at date of approval) Wispinski, D. Chairperson Alberta Research Council Gaudet, N. National Defence Jacula, T. Maxxam Analytics Inc. Lee, S.W. Natural Resources Canada McRae, M. Canadian Redwood Management Mathoney, B.J. I
26、mperial Oil, Products and Chemicals Division Melnyk, S. Shell Canada Products Pickard, A.L. Consultant Porter, S. Suncor Energy Products Inc. Purificati, D. Petro-Canada Samiullah, M. Sentinel Canada Tharby, R.D. Tharby Technology, Consultants Turle, R. Environment Canada Newman, M. Secretary Canadi
27、an General S tandards Board Copyright Canadian General Standards Board Provided by IHS under license with CGSBNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1 National Standard of Canada METHODS OF TESTING PETROLEUM AND ASSOCIATED PRODUCTS CAN/CGSB-3.0 Gatineau Ca
28、nada K1A 1G6 CGSB Cetane Index of Diesel Fuels No. 20.9-2005 Supersedes CAN/CGSB-3.0 No. 20.9-95 1. SCOPE 1.1 This method describes a means for calculating the cetane index of diesel fuels (without cetane improvers) from the aniline point, distillation, density and viscosity. The index, as computed
29、from the prescribed formula, is termed the CGSB Cetane Index (CI). 1.2 A suggested procedure is also outlined in Appendix A to estimate the cetane index, additized (CIA), based on the calculated cetane index for diesel fuels containing diesel ignition improver (DII). This procedure can be used to es
30、timate the combustion quality when CI and DII are used, and a cetane engine test is not performed. The Appendix A does not form a mandatory part of this method. 1.3 The testing and evaluation of a product against this method may require the use of materials and/or equipment that could be hazardous.
31、This document does not purport to address all the safety aspects associated with its use. Anyone using this method has the responsibility to consult the appropriate authorities and to establish appropriate health and safety practices in conjunction with any applicable regulatory requirements prior t
32、o its use. 2. REFERENCED PUBLICATIONS 2.1 The following publications are referenced in this method: 2.1.1 ASTM International D 86 Standard Test Method for Distillation of Petroleum Products at Atmospheric Pressure D 445 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (
33、and the Calculation of Dynamic Viscosity) D 611 Standard Test Methods for Aniline Point and Mixed Aniline Point of Petroleum Products and Hydrocarbon Solvents D 613 Standard Test Method for Cetane Number of Diesel Fuel Oil D 976 Standard Test Methods for Calculated Cetane Index of Distillate Fuels D
34、 1298 Standard Test Method for Density, Relative Density (Specific Gravity), or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method D 4052 Standard Test Method for Density and Relative Density of Liquids by Digital Density Meter E 29 Standard Practice for Using Signific
35、ant Digits in Test Data to Determine Conformance with Specifications. 2.2 A dated reference in this method is to the issue specified. An undated reference in this method is to the latest issue, unless otherwise specified by the authority applying this method. The sources are given in the Notes secti
36、on. Copyright Canadian General Standards Board Provided by IHS under license with CGSBNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2 No. 20.9-2005 3. SUMMARY OF METHOD 3.1 The aniline point, the 10%, 50% and 90% distillation points, the density at 15C, and the v
37、iscosity at 40C are determined, and the CGSB Cetane Index (CI) is calculated. 4. SIGNIFICANCE AND USE 4.1 The CGSB Cetane Index is useful for estimating the ASTM cetane number of diesel fuels from properties often routinely determined on the fuels. 4.1.1 This method is more suitable for estimating t
38、he cetane number of Canadian fuels, particularly those of oil sands origin. In the range below 40 cetane number, this method is preferable to that of ASTM D 976 for estimating the ASTM cetane number. Note: The CGSB Cetane Index is not a replacement for the ASTM cetane number as determined by ASTM D
39、613. 4.2 Correlation with Cetane Number Based on a series of 260 Canadian diesel fuels ranging from 28 to 63 cetane number, the expected correlation of the calculated cetane index with the ASTM cetane number will be less than 1.5 cetane numbers for 66% of the fuels evaluated. 5. PROCEDURE 5.1 Anilin
40、e Point Determine the aniline point of the fuel in accordance with ASTM D 611. 5.2 10%, 50% and 90% Distillation Recovery Temperatures Determine the 10%, 50% and 90% distillation temperatures of the fuel corrected for barometric pressure, based on percentage recovery, in accordance with ASTM D 86. 5
41、.3 Density Determine the density of the fuel at 15C in accordance with ASTM D 1298 or D 4052. 5.4 Viscosity Determine the viscosity of the fuel at 40C in accordance with ASTM D 445. 6. CALCULATION 6.1 Calculate the CGSB Cetane Index by means of the following equation: VBBAA 6350.0 5844.0 6150.11 003
42、867.0 017657628.77CI22+= where: C point, aniline =A ()500820%90%50%102+=DB (cSt) /smm C,40at viscosity2=V1pressure) barometricfor (corrected C points, recovery ondistillati 90% 50%, 10%, = 3kg/m C,15at density =D 7. REPORT 7.1 Report the result to one decimal place as CGSB Cetane Index. _ 1The SI un
43、it for kinematic viscosity is the square metre per second. The preferred multiple for fluids in this viscosity range is the square millimetre per second, which is equivalent to a centistokes (i.e., 1 mm2/s = 1 cSt). Copyright Canadian General Standards Board Provided by IHS under license with CGSBNo
44、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-No. 20.9-2005 3 8. PRECISION 8.1 The calculation of the CGSB Cetane Index from the aniline point, distillation points, density and viscosity is exact, and no precision limits can be assigned to the calculation itself. 8
45、.2 The precision of the CGSB Cetane Index is dependent only on the precisions of the original four tests. 8.3 Assuming that test results from the four tests complied with their respective precisions, the following precision statements apply to the calculation of the CGSB Cetane Index. 8.3.1 Repeatab
46、ility The difference between two results obtained by the same operator with the same apparatus under constant operating conditions on identical test material would, in the long term, in the normal and correct operation of the test methods, exceed 0.2 only in one case in twenty. 8.3.2 Reproducibility
47、 The difference between two single and independent results obtained by different operators working in different laboratories on identical test material would, in the long term, in the normal and correct operations of the test methods, exceed 0.5 only in one case in twenty. 9. NOTES 9.1 Reference Thi
48、s method was developed by a Task Force of the Diesel Fuel Panel of the CGSB Middle Distillate Fuels Committee. A report providing details of the development program has been published as SAE Paper No. 841344, Development of the Canadian General Standards Board (CGSB) Cetane Index. 9.2 Related Public
49、ation ASTM D 4737 Standard Test Method for Calculated Cetane Index by Four Variable Equation. 9.3 Sources of Referenced Publications The following addresses were valid at the date of publication. 9.3.1 The publications referred to in par. 2.1.1 and 9.2 may be obtained from ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, U.S.A., telephone (610) 832-9585, fax (
