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 .

[1] 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 .

[2] 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 .