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ASTM D7467 is a specification for biodiesel blends from B6 to B20.The ASTM Standard Specification for Diesel Oil, ASTM D975, was modified in 2008 to allow up to 5% biodiesel to be blended into the fuel.Two automotive standards for biodiesel/diesel fuel blends have been published by ASTM: Since 2012, the ASTM D6751 standard defines two grades of biodiesel: grade 2-B (identical to biodiesel defined by earlier versions of the standard) and grade 1-B with tighter controls on monoglycerides and cold soak filterability. Rather, it is for the biodiesel component that is to be blended to produce biodiesel/diesel fuel blends. While the specification was written for B100, it is not intended for neat biodiesel used as automotive fuel. In the USA, ASTM D6751 establishes specifications for a biodiesel blend stock for middle distillate fuels. The US and EU standards have international significance they are usually the starting point for biodiesel specifications developed in other countries (see also Fuel Regulations).Īpproaches to US and EU standards for biodiesel differ. In Europe, EN 14214 biodiesel standard (based on former DIN 51606) was finalized in October 2003. The first ASTM standard (ASTM D6751) was adopted in 2002. ASTM International (formerly American Society for Testing and Materials) adopted a provisional specification PS121 for biodiesel in 1999.
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This paper includes a summary of these standards, compares the US and EU specifications and test methods, and discusses the underlying issues.ĭevelopment of biodiesel standards started in the 1990s, to support the increasing use of alkyl esters-based biodiesel and its blends as automotive fuels. Abstract: Two major specifications establishing the quality requirements for alkyl ester-based biodiesel fuels are the ASTM D6751 in the USA and the EN 14214 in Europe.
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