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1、a Date: 15 January 2008 Origin: European Latest date for receipt of comments: 31 March 2008 Project no.: 2007/02772 Responsible committee: PTI/13 Petroleum testing and terminology Interested committees: Title: Draft BS EN 15751 Automotive fuels - Fatty acid methyl ester (FAME) fuel and blends with d
2、iesel fuel - Determination of oxidation stability by accelerated oxidation method Supersession information: If this document is published as a standard, the UK implementation of it will supersede NONE and partially supersede. NONE If you are aware of a current national standard which may be affected
3、, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 31 March 2008. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to pu
4、blication. No acknowledgement will normally be sent. See overleaf for information on commenting. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization for
5、briefing purposes. Electronic circulation is limited to dissemination by e-mail within such an organization by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email ordersbsi-. British, International and foreign standards are a
6、lso available from BSI Customer Services. Information on the co-operating organizations represented on the committees referenced above may be obtained from the responsible committee secretary. Cross-references The British Standards which implement International or European publications referred to i
7、n this draft may be found via the British Standards Online Service on the BSI web site http:/www.bsi-. Direct tel: 020 7467 7130 Responsible Committee Secretary: Ms S Quintanilla (BSI) 61 New Cavendish Street;London;W1G 7AR;GB E-mail: sonia.quintanillaenergyinst.org.uk Draft for Public Comment Head
8、Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 7.0 DPC: 08/30172824 DC Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 07:02:46 GMT+00:00 2008, Uncontrolled Copy, (c) BSI b Introduction This draf
9、t standard is based on European discussions in which the UK has taken an active part. Your comments on this draft are welcome and will assist in the preparation of the consequent British Standard. If no comments are received to the contrary, then the UK will approve this draft and implement it as a
10、British Standard. Comment is particularly welcome on national, legislative or similar deviations that may be necessary. Even if this draft standard is not approved by the UK, if it receives the necessary support in Europe, the UK will be obliged to publish the official English Language text unchange
11、d as a British Standard and to withdraw any conflicting standard. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on this draft. Submission The guidance given below is intended to ensure that all comments receive efficient and appropriate
12、attention by the responsible BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible Committee Secretary at the address given on the front cover. Comments should be compatible with Version 6.0 or Version 9
13、7 of Microsoft Word for Windows, if possible; otherwise comments in ASCII text format are acceptable. Any comments not submitted electronically should still adhere to these format requirements. All comments submitted should be presented as given in the example below. Further information on submittin
14、g comments and how to obtain a blank electronic version of a comment form are available from the BSI web site at: http:/www.bsi- Template for comments and secretariat observations Date: xx/xx/200x Document: ISO/DIS xxxxx 1 2 (3) 4 5 (6) (7) MB Clause No./ Subclause No./ Annex (e.g. 3.1) Paragraph/ F
15、igure/Table/ Note (e.g. Table 1) Type of com- ment Comment (justification for change) by the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Definition 1 ed Definition is ambiguous and needs clarifying. Amend to read . so that the mains connector to which no conne
16、ction . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. Microsoft and MS-DOS are registered trademarks, and Windows is a trademark of Microsoft Corporation. Licens
17、ed Copy: London South Bank University, London South Bank University, Fri Feb 15 07:02:46 GMT+00:00 2008, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM DRAFT prEN 15751 January 2008 ICS 75.160.20 English Version Automotive fuels - Fatty acid methyl ester (FAME) fuel and
18、 blends with diesel fuel - Determination of oxidation stability by accelerated oxidation method Kraftstoffe fr Kraftfahrzeuge - Kraftstoff Fettsuremethylester (FAME) und Mischungen mit Dieselkraftstoff - Bestimmung der Oxidationsstabilitt (beschleunigtes Oxidationsverfahren) This draft European Stan
19、dard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 19. If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of
20、 a national standard without any alteration. This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management
21、 Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
22、Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting documentation. Warning : This document is no
23、t a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a European Standard. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-
24、1050 Brussels 2008 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. prEN 15751:2008: E Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 07:02:46 GMT+00:00 2008, Uncontrolled Copy, (c) BSI prEN 15751:
25、2008 (E) 2 Contents Page Foreword3 Introduction.4 1 Scope 5 2 Normative references5 3 Terms and definitions .5 4 Principle5 5 Reagents and materials 6 6 Apparatus .6 7 Sampling.8 8 Preparation of measurement8 8.1 Preparation of test sample8 8.2 Preparation of apparatus 9 9 Procedure .10 10 Calculati
26、on and evaluation.11 10.1 Automatic evaluation 11 10.2 Manual evaluation12 11 Expression of results 12 12 Precision.13 12.1 General13 12.2 Repeatability, r.14 12.3 Reproducibility, R14 13 Test report14 Annex A (informative) Background of the method 15 Bibliography16 Licensed Copy: London South Bank
27、University, London South Bank University, Fri Feb 15 07:02:46 GMT+00:00 2008, Uncontrolled Copy, (c) BSI prEN 15751:2008 (E) 3 Foreword This document (prEN 15751:2008) has been prepared by Technical Committee CEN/TC 19 “Gaseous and liquid fuels, lubricants and related products of petroleum, syntheti
28、c and biological origin”, the secretariat of which is held by NEN. This document is currently submitted to the CEN Enquiry. Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 07:02:46 GMT+00:00 2008, Uncontrolled Copy, (c) BSI prEN 15751:2008 (E) 4 Introduction Thi
29、s document is based on the EN 14112:2003 1, which was specifically adapted for the determination of oxidation stability of fatty acid methyl esters (FAME). This method had been developed under CEN/TC 307 (Fats and oils). At the time of development the method was applicable for FAME fuel according to
30、 EN 14214 2, but questions remained on the accuracy towards blends of FAME and diesel fuel. The modifications to EN 14112 as given in this document, allow application of this test method for oxidation stability for pure FAME and diesel/FAME blends at various levels. The goal was to have one single t
31、est method for FAME fuel, diesel/FAME blends and pure diesel fuels. Although the modifications cover FAME fuel and diesel/FAME blends, CEN/TC 307 decided that it was better to retain EN 14112 for methyl esters and publish a separate Standard for all automotive fuel and heating oil applications, as t
32、he use of diesel and diesel blends falls out the scope of CEN/TC 307. The modifications required a new validation covering pure FAME, diesel/FAME blends and pure diesel fuels, which resulted in the fact that the method is not suitable for pure petroleum-based diesel fuels. Licensed Copy: London Sout
33、h Bank University, London South Bank University, Fri Feb 15 07:02:46 GMT+00:00 2008, Uncontrolled Copy, (c) BSI prEN 15751:2008 (E) 5 1 Scope This European Standard specifies a test method for determining the oxidation stability of fuels for diesel engines. The method is applicable to fatty acid met
34、hyl esters (FAME) intended for use as pure biofuel or as a blending component for diesel fuels, and to blends of FAME and petroleum-based diesel. NOTE EN 14112 1 describes a similar test method for oxidation stability determination fatty acid methyl esters for non-fuel purposes (see the Introduction
35、 to this European Standard). EN ISO 12205 3 describes a test method that is applicable to pure petroleum-based diesel. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated r
36、eferences, the latest edition of the referenced document (including any amendments) applies. EN ISO 3170, Petroleum liquids Manual sampling (ISO 3170:2004) EN ISO 3171, Petroleum liquids Automatic pipeline sampling (ISO 3171:1988) 3 Terms and definitions For the purposes of this European Standard, t
37、he following terms and definitions apply. 3.1 induction period time which passes between the moment when the measurement is started and the moment when the formation of oxidation products rapidly begins to increase 3.2 oxidation stability induction period determined according to the procedure specif
38、ied in this European Standard, expressed in hours 4 Principle A stream of purified air is passed through the sample which has been brought to a specified temperature. The vapours released during the oxidation process, together with the air, are passed into a flask containing water which has been dem
39、ineralised or distilled and contains an electrode for measuring the conductivity. The electrode is connected to a measuring and recording device. It indicates the end of the induction period when the conductivity begins to increase rapidly. This accelerated increase is caused by the dissociation of
40、volatile carboxylic acids produced during the oxidation process and absorbed in the water. For more details on the background of the method see Annex A. Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 07:02:46 GMT+00:00 2008, Uncontrolled Copy, (c) BSI prEN 1575
41、1:2008 (E) 6 5 Reagents and materials Use only reagents of recognised analytical grade, and distilled or demineralised water. 5.1 Ternary solvent mixture, consisting of methanol/toluene/acetone 1:1:1 (by volume) 5.2 Alkaline laboratory glass cleaning solution 5.3 2-Propanol 6 Apparatus Usual laborat
42、ory equipment and glassware, together with the following. 6.1 Appliance for the determination of oxidation stability, consisting of the following (see Figures 1 and 2 for diagrammatic representations): NOTE An apparatus for determining oxidation stability can be obtained commercially under the trade
43、 name Rancimat, (model 743 or higher, from Metrohm AG, Herisau, Switzerland) or OSI Instrument (from Omnion Inc., Rockland, Massachusetts, USA). These are examples of suitable equipment and are given for the convenience of users of this document. It does not constitute an endorsement by CEN of this
44、equipment. 6.1.1 Air filter, comprising a tube fitted with filter paper at the ends and filled with a molecular sieve (6.6), connected to the suction end of a pump. 6.1.2 Gas diaphragm pump, with an adjustable flow rate of 10 l/h in combination with an apparatus to control the flow rate manually or
45、automatically with a maximum deviation of 1,0 l/h from the set value. 6.1.3 Reaction vessels of borosilicate glass, provided with a sealing cap. The length of the reaction vessel depends on the measuring equipment and shall stick out of the oven at least for 130 mm. Condensing volatile fuel componen
46、ts at the cold vessel walls outside the oven reduces evaporation losses to a minimum. EXAMPLE Total length of the test tube for the Metrohm Rancimat 743 L = 250 mm, for the Omnion OSI Instrument L = 300 mm. The sealing cap shall be fitted with a gas inlet and outlet tube. The cylindrical part of the
47、 vessel shall preferably be narrower a few centimetres below the top in order to break any emerging foam. An artificial foam blocker (e.g. glass ring) may also be used for this purpose. 6.1.4 Closed measurement cells, of approximately 150 ml capacity, with a gas inlet tube extending to the bottom in
48、side of the vessel. The cell shall be provided at the top with ventilation holes. 6.1.5 Electrodes, for measuring conductivity with a measuring range of 0 S/cm to 300 S/cm aligned with the dimensions of the measurement cell (6.1.4). 6.1.6 Measuring and recording apparatus, comprising of: a) an ampli
49、fier, and b) a recorder for registering the measuring signal of each of the electrodes (6.1.5). 6.1.7 Thyristor and contact thermometer graduated in 0,1 C or Pt 100 element to measure the block temperature, with attachments for relay connection and an adjustable heating element; temperature scale 0 C to 150 C. Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 07:02:46 GMT+00:00 2008, Uncontrolled Copy, (c) BSI prEN 15751:2008 (E
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