Various Technology—Biodiesel (1-100%)
Biodiesel: Diesel fuel oil modified with 0 to 100% biologically derived oils. The use of biodiesel fuel is one recognized retrofit technology used to reduce diesel engine emissions. Emission reduction information is provided below.
Highway, heavy duty, 2 & 4 cycle
|Reduction in particulate matter (PM)||0-47%|
|Reduction in nitrogen oxide (NOx)||0-(-10)%|
|Reduction in hydrocarbons (HC)||0-67%|
|Reduction in carbon monoxide (CO)||0-47%|
- Reductions for all pollutants must be calculated for a particular biodiesel fuel. Download this biodiesel reduction spreadsheet (XLS)(2 pp, 23 K, May 2007) Free Viewers calculation file to use to determine reductions.
- A negative value in the table above indicates an increase in that pollutant.
- There are no data on biodiesel effects on engine durability, materials compatibility, fuel storage stability, lubricity, biodiesel production feedstocks or costs, cold flow properties, cost, renewability/full fuel lifecycle emissions.
- There is a slight fuel economy penalty with biodiesel use. An approximate fuel penalty calculation can be made with calculation worksheets above.
- Biodiesel fuel is composed of mono-alkyl esters of long chain fatty acids derived from vegetable oils or animal fats meeting the requirements of American Society of Testing and Materials (ASTM) D 6751.
- A biodiesel blend is a mix of biodiesel fuel meeting ASTM D 6751 with petroleum-based diesel fuel, and designated BXX, where XX represents the volume percentage of biodiesel fuel in the mix.
- EPA does not endorse the use of any particular company's product.