ASTM D 6751
The US standard ASTM D 6751 describes the minimum requirements for biodiesel in the United States . It is published by ASTM , the American Society for Testing and Materials .
In contrast to the European biodiesel standard EN 14214 , the US standard specifies fewer parameters. EN 14214, for example, requires the determination of oxidative stability at 110 ° C with a minimum induction time of 6 hours using the Rancimat method and specific aspects of the chemical composition such as the linoleic acid content or the double bond content . The ASTM standard D 6751 currently does not contain a specification of this type.
specification
property | unit | lower limit | upper limit | Test procedure |
---|---|---|---|---|
Flash point | ° C | 130 | - | D 93 |
Water and solids | Vol% | - | 0.05 | D 2709 |
Viscosity at 40 ° C | mm² / s | 1.9 | 6.0 | D 445 |
Sulphated ash | Mass.% | - | 0.02 | D 874 |
Sulfur content | Mass.% | - | 0.0015 | D 5453 |
Corrosive effect on copper | class | - | 3 | D 130 |
Cetane number | - | 47 | - | D 613 |
Cloud point | ° C | - | - | D 2500 |
Carbon residue | Mass.% | - | 0.05 | D 4535 |
Acid number | mgKOH / g | - | 0.05 | D 664 |
Free glycerin | Mass.% | - | 0.02 | D 6584 |
Total glycerin | Mass.% | - | 0.24 | D 6584 |
Phosphorus content | Mass.% | - | 0.001 | D 4951 |
Sodium / potassium | ppm | - | 5 | UOP 391 |
End of boiling (90%) | ° C | - | 360 | D 1160 |
Individual evidence
- ^ Gerhard Knothe: Dependence of biodiesel fuel properties on the structure of fatty acid alkyl esters. In: Fuel Processing Technology . 86, 2005, pp. 1059-1070, doi : 10.1016 / j.fuproc.2004.11.002 .
- ^ Gerhard Knothe: Analyzing biodiesel: standards and other methods. In: Journal of the American Oil Chemists' Society . 83, 2006, pp. 823-833, doi : 10.1007 / s11746-006-5033-y .