SIST EN 16091:2012
(Main)Liquid petroleum products - Middle distillates and fatty acid methyl ester (FAME) fuels and blends - Determination of oxidation stability by rapid small scale oxidation method
Liquid petroleum products - Middle distillates and fatty acid methyl ester (FAME) fuels and blends - Determination of oxidation stability by rapid small scale oxidation method
This document specifies a method for the determination of the induction time as a measure for oxidation stability in diesel fuels, diesel fuel/biodiesel blends, biodiesel and closely related middle distillate fuels by measuring the pressure drop of a test portion subjected in a pressurized vessel in an oxygen atmosphere.
Flüssige Mineralölerzeugnisse - Mitteldestillat- und Fettsäuremethylesterkraftstoffe und Mischungen - Bestimmung der Oxidationsstabilität mit beschleunigtem Verfahren und kleiner Probenmenge
Dieses Dokument legt ein Verfahren zur Bestimmung der Beständigkeit von Dieselkraftstoffen, Fettsäuremethylestern (FAME) — sowie Gemischen aus beiden unter beschleunigten Oxidationsbedingungen fest. Dies geschieht durch Bestimmung der Induktionsdauer bis zum definierten Brechpunkt in einem Prüfgerät mit Druckbehälter und der zu untersuchenden Probe die mit Sauerstoff beaufschlagt wurde.
ANMERKUNG 1 Für die Zwecke dieses Dokuments wird zur Angabe des Volumenanteils einer Substanz der Ausdruck „% (V/V)“ verwendet.
ANMERKUNG 2 Die Induktionsdauer kann einen Hinweis auf die Neigung von FAME und Mischungen aus FAME und Dieselkraftstoff zur Harzbildung während der Lagerung geben. Es ist jedoch anzumerken, dass die Beziehung deutlichen Variationen unterliegt und zwar in Abhängigkeit von unterschiedlichen FAME’s und Dieselkraftstoffgemischen und von den Lagerbedingungen.
ANMERKUNG 3 Die Anwesenheit von Zündbeschleunigern in Kraftstoffen kann dazu führen, dass die Ergebnisse der Oxidationsstabilität mit diesem Prüfverfahren vermindert werden. In der Praxis wurde beobachtet, dass durch Zugabe von EHN ( Ethyl — Hexyl — Nitrat ) die gemessenen Werte der Oxidationsstabilität geringer ausfallen .
Produits pétroliers liquides - Carburants et mélanges des distillats moyens et des esters méthyliques d'acides gras (EMAG) - Détermination de la stabilité à l'oxydation par méthode d'oxydation accélérée petite échelle
La présente Norme européenne prescrit une méthode pour la détermination, dans des conditions d’oxydation
accélérée, de la stabilité à l’oxydation des distillats moyens, des esters méthyliques d’acides gras (EMAG) et
de leurs mélanges. Elle est basée sur la mesure de la période d’induction à un point de rupture donné dans
un récipient de réaction contenant l’échantillon et de l’oxygène.
NOTE 1 Pour les besoins de la présente Norme européenne, l’expression "% (V/V)" est utilisée pour représenter la
fraction volumique (φ).
NOTE 2 La période d’induction est considérée comme une indication pour la résistance des distillats moyens, des
EMAG et de leurs mélanges à l’oxydation. Il convient cependant de reconnaître que cette corrélation peut varier nettement
selon les différentes conditions concernant les mélanges des divers EMAG et de carburant diesel.
NOTE 3 La présence d’additifs améliorants de cétane peut entraîner une minoration des résultats de stabilité à
l’oxydation mesurée par cette méthode. Il a été observé par exemple que l’ajout de 2-éthyl hexyl nitrate (2EHN) peut
abaisser les valeurs mesurées de stabilité à l’oxydation.
Tekoči naftni proizvodi - Goriva na osnovi srednjih destilatov, metilnih estrov maščobnih kislin (FAME) in mešanic - Ugotavljanje oksidacijske stabilnosti z oksidacijsko metodo rapidne male skale
Ta dokument določa metodo za ugotavljanje indukcijskega časa kot merila za oksidacijsko stabilnost v dizelskih gorivih, mešanicah dizelskega goriva/biodizla, biodizlu in tesno povezanih srednjih destilatnih gorivih z merjenjem padca tlaka v preskusnem vzorcu v tlačni posodi ob prisotnosti kisika.
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Flüssige Mineralölerzeugnisse - Mitteldestillat- und Fettsäuremethylesterkraftstoffe und Mischungen - Bestimmung der Oxidationsstabilität mit beschleunigtem Verfahren und kleiner ProbenmengeProduits pétroliers liquides - Carburants et mélanges des distillats moyens et des esters méthyliques d'acides gras (EMAG) - Détermination de la stabilité à l'oxydation par méthode d'oxydation accélérée petite échelleLiquid petroleum products - Middle distillates and fatty acid methyl ester (FAME) fuels and blends - Determination of oxidation stability by rapid small scale oxidation method75.160.20Liquid fuelsICS:Ta slovenski standard je istoveten z:EN 16091:2011SIST EN 16091:2012en,de01-februar-2012SIST EN 16091:2012SLOVENSKI
STANDARD
SIST EN 16091:2012
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16091
November 2011 ICS 75.160.20 English Version
Liquid petroleum products - Middle distillates and fatty acid methyl ester (FAME) fuels and blends - Determination of oxidation stability by rapid small scale oxidation method
Produits pétroliers liquides - Distillats moyens, esters méthyliques d'acides gras (EMAG) et leurs mélanges - Détermination de la stabilité à l'oxydation par méthode d'oxydation accélérée à petite échelle
Flüssige Mineralölerzeugnisse - Mitteldestillat- und Fettsäuremethylesterkraftstoffe und Mischungen - Bestimmung der Oxidationsstabilität mit beschleunigtem Verfahren und kleiner Probenmenge This European Standard was approved by CEN on 15 October 2011.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists 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-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16091:2011: ESIST EN 16091:2012
EN 16091:2011 (E) 2 Contents Page Foreword .31Scope .42Normative references .43Terms and definitions .44Principle .45Reagents and materials .46Apparatus .56.1Automatically controlled oxidation tester, comprising an oxidation reaction vessel containing: .56.2Pipette, capable of delivering 5,0 ml ± 0,1 ml. .56.3O-ring seals, see A.6. .57Sampling and sample handling .58Performance check of the apparatus.59Preparation of the apparatus .610Procedure .611Expression of results .712Precision .712.1General .712.2Repeatability, r .712.3Reproducibility, R .713Test report .7Annex A (normative)
Apparatus description .8A.1General requirements .8A.2Assembly of apparatus .8A.3Reaction vessel .9A.4Screw cap .9A.5Electric heater .9A.6O-ring seals .9A.7Valves .9A.8Pressure sensor .9A.9Temperature sensor .9A.10Connecting pipes .9A.11Cooling fan . 10Annex B (informative)
Calibration process. 11Annex C (informative)
Determination of induction period . 12Bibliography . 13 SIST EN 16091:2012
EN 16091:2011 (E) 3 Foreword This document (EN 16091:2011) has been prepared by Technical Committee CEN/TC 19 “Gaseous and Liquid fuels, lubricants and related products of petroleum, synthetic and biological origin”, the secretariat of which is held by NEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2012, and conflicting national standards shall be withdrawn at the latest by May 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 16091:2012
EN 16091:2011 (E) 4 1 Scope This European Standard specifies a method for the determination of the oxidation stability of middle distillate fuels, fatty acid methyl ester (FAME) fuel and blends thereof, under accelerated conditions, by measuring the induction period to the specified breakpoint in a reaction vessel charged with the sample and oxygen. NOTE 1 For the purposes of this European Standard, the term “% (V/V)” is used to represent the volume fraction (3). NOTE 2 The induction period is used as an indication for the resistance of middle distillates, fatty acid methyl ester (FAME) fuels and blends thereof against oxidation. It should be recognized, however, that this correlation can vary markedly under different conditions with different FAMEs and diesel fuel blends. NOTE 3 The presence of ignition improvers may lead to lower oxidation stability results determined by this method. It has for instance been observed that the addition of 2-ethyl hexyl nitrate (2EHN) can reduce the measured oxidation stability values. 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 references, 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 document, the following terms and definitions apply. 3.1 breakpoint point in the pressure-time curve, where the pressure in the vessel has dropped 10 % below the maximum pressure achieved in the current test run 3.2 induction period time elapsed between starting the heating procedure of the reaction vessel, charged with sample and oxygen, and the breakpoint at 140 ºC 4 Principle At ambient temperature, a known volume of a sample is placed in a reaction vessel charged with oxygen t
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