Ropné produkty

Oblast zaměření: Ropné produkty
Komise : CEN/TC 19 (Gaseous and liquid fuels, lubricants and related products of petroleum, synthetic and biological origin)
Původce: CEN
K připomínkám do: 20.11.2018
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This document specifies a laboratory method for the determination of the distillation characteristics of light and middle distillates derived from petroleum and related products of synthetic or biological origin with initial boiling points above 20 °C and end-points below approximately 400 °C, at atmospheric pressure utilizing an automatic micro distillation apparatus.

This test method is applicable to such products as; light and middle distillates, automotive spark-ignition engine fuels, automotive spark-ignition engine fuels containing up to 20 % ethanol, aviation gasolines, aviation turbine fuels, (paraffinic) diesel fuels, FAME (B100), diesel blends up to 30 % fatty acid methyl esters (FAME), special petroleum spirits, naphtha’s, white spirits, kerosene’s, burner fuels, and marine fuels.

The test method is also applicable to hydrocarbons with a narrow boiling range, like organic solvents or oxygenated compounds.

The test method is designed for the analysis of distillate products; it is not applicable to products containing appreciable quantities of residual materiál.

Oblast zaměření: Ropné produkty
Komise : CEN/TC 19 (Gaseous and liquid fuels, lubricants and related products of petroleum, synthetic and biological origin)
Původce: CEN
K připomínkám do: 27.11.2018
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This document specifies a wavelength-dispersive X‑ray fluorescence (WDXRF) test method for the determination of the sulfur content of liquid, homogeneous automotive fuels from 5 mg/kg to 500 mg/kg, which have a maximum oxygen content of 3,7 % (m/m). This product range covers diesel fuels containing up to about 30 % (V/V) fatty acid methyl esters (FAME) and motor gasolines containing up to about 10 % (V/V) ethanol, and synthetic fuels such as Hydrotreated Vegetable Oil (HVO) and Gas To Liquid (GTL) having sulfur contents in the range of 5 mg/kg to 45 mg/kg.

NOTE 1     Sulfur contents higher than 500 mg/kg can be determined after sample dilution. However, the precision was not established for diluted samples.

Products with higher oxygen content show significant matrix effects, e.g. FAME used as biodiesel. Nevertheless, FAME may be analysed when the corresponding procedures are followed (see 5.3 and 8.1).

Other products may be analysed with this test method. However, precision data for products other than those mentioned have not been established for this document.

NOTE 2       For the purposes of this document, the terms “% (m/m)” and “% (V/V)” are used to represent the mass fraction, μ, and the volume fraction, φ, of a material respectively.

Oblast zaměření: Ropné produkty
Komise : CEN/TC 19 (Gaseous and liquid fuels, lubricants and related products of petroleum, synthetic and biological origin)
Původce: CEN
K připomínkám do: 28.11.2018
Zobraz více Zobraz méně
 

This document specifies an ultraviolet (UV) fluorescence test method for the determination of the sulfur content of motor gasolines containing up to 3,7 % (m/m) oxygen [including those blended with ethanol up to about 10 % (V/V)], diesel fuels, including those containing up to about 30 % (V/V) fatty acid methylester (FAME), having sulfur contents in the range 3 mg/kg to 500 mg/kg and synthetic fuels, such as Hydrotreated Vegetable Oil (HVO) and Gas To Liquid (GTL), having sulfur contents in the range of 3 mg/kg to 45 mg/kg.

Other products can be analysed and other sulfur contents can be determined according to this test method, however, no precision data for products other than automotive fuels and for results outside the specified range have been established for this document. Halogens interfere with this detection technique at concentrations above approximately 3 500 mg/kg.

NOTE 1       Some process catalysts used in petroleum and chemical refining can be poisoned when trace amounts of sulfur-bearing materials are contained in the feedstocks.

NOTE 2       This test method can be used to determine sulfur in process feeds and can also be used to control sulfur in effluents.

NOTE 3       For the purposes of this document, the terms “% (m/m)” and “% (V/V)” are used to represent the mass fraction, μ, and the volume fraction, φ, of a material respectively.

NOTE 4       Sulfate species in ethanol do not have the same conversion factor of organic sulfur in ethanol. Nevertheless, sulfates have a conversion factor close to that of organic sulfur.

NOTE 5       It is preferable to check the nitrogen interference and to take it into account, especially when sulfur content is measured on diesel blended with cetane improver containing nitrogen. For example, alkyl nitrate, as 2‑ethyl hexyl nitrate (EHN), added as cetane improver to diesel fuel shows an enhancing effect on sulfur content that can range from (0 to 1,7) mg/kg when 2 000 mg/kg EHN is added to diesel fuel containing 10 mg/kg sulfur.