ASTM WK63718

    New Test Method for Determination of the Fatty Acid Methyl Esters (FAME) Content of Aviation Turbine Fuel Using Mid-Infrared Laser Spectroscopy

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    Developed by Subcommittee: D02.J0.05 | Committee D02 | Contact Staff Manager



    WK63718

    1. Scope

    1.1 This test method is for the quantification of the fatty acid methyl esters (FAME) content in aviation turbine fuel (AVTUR) in the range of 5 to 400 mg/kg by measuring infrared transmission before, during, and after FAME is converted to molecules that absorb in a different spectral region than FAME using a selective chemical reaction facilitated by a suitable catalyst. NOTE 1-This test method detects all FAME components with peak IR absorbance at approximately 1749 cm-1 and C8 to C22 carbon chain length, as specified in standards such as Specification D1655 and EN 14214. The accuracy of this test method is based on the molecular weight of C16 to C18 FAME species. The presence of other FAME species with different molecular weights could affect the accuracy. NOTE 2-Additives such as antistatic agents, antioxidants, and corrosion inhibitors are measured with the FAME by mid infrared absorption. However, these additives do not contribute to the differential absorption spectrum used to quantify FAME, as they do not take part in the selective reaction. NOTE 3-FAME concentrations below 5 mg/kg can be measured, but the precision could be affected. 1.2 Units--The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. 1.3 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.


    Keywords

    AVTUR; biodiesel in jet fuel; contamination; FAME; FAME in jet fuel; mid-infrared laser spectroscopy; QCL; methyl esters

    Rationale

    The present and growing international governmental requirements to add fatty acid methyl esters (FAME) to diesel fuel has had the unintended side effect of potential FAME cross contamination of jet fuel. This problem arises when using multiproduct transport facilities such as tanker ships, trucks, and pipelines. FAME has led to industry wide concerns because it is suspected to influence negatively the thermal stability of jet fuel. Furthermore, it can cause performance deterioration of aircraft engines by coke deposits and filter blockages. The proposed test method is developed for use in the supply chain by non-specialized personnel.

    The title and scope are in draft form and are under development within this ASTM Committee.

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    Work Item Status

    Date Initiated:
    05-30-2018

    Technical Contact:
    Jean-Philippe Belieres

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