5 January 2012

The US Environmental Protection Agency (EPA) adopted the final 2012 percentage standards for the four fuels categories under the agency’s Renewable Fuel Standard program, known as RFS2.

The Energy Independence and Security Act of 2007 (EISA) established the annual renewable fuel volume targets, reaching an overall level of 36 billion gallons in 2022. To achieve these volumes, every year EPA issues percentage-based renewable fuel standards for the following year. Based on the standard, each refiner, importer and non-oxygenate blender of gasoline or diesel determines the minimum volume of renewable fuel that it must ensure is used in its transportation fuel.

The final 2012 overall volumes and standards are:

Final 2012 RFS2 Fuel Volumes and Percentage Standards
CategoryVolumesPercentage
Standard
ActualEthanol Equivalent
Cellulosic biofuels8.65 million gallons10.45 million gallons0.006%
Biomass-based diesel1.0 billion gallons1.5 billion gallons0.91%
Advanced biofuels2.0 billion gallons2.0 billion gallons1.21%
Total renewable fuels15.2 billion gallons15.2 billion gallons9.23%

Percentage standards are based on ethanol-equivalent volumes, not actual volumes. The ethanol-equivalent volume is determined from the volumetric energy content of a biofuel in comparison to the volumetric energy content of denatured ethanol. Biodiesel and cellulosic diesel have equivalence values of 1.5 and 1.7 ethanol equivalent gallons respectively.

Source: US EPA