BiodieselThe QuestionWhat is lubricity?EnginePetroleum Diesel/PetrodieselBiodiesel (B100)Biodiesel (B2)FuelsSourcesSources (cont)BiodieselGroup 6: Mark, Shantell, Andrew,Angela, Dmitry© Dmitry, 2006The Question•Truckers and other commercial haulers like biodiesel because of blend of biodiesel with petroleum diesel improves the lubricity of the fuelWhat is lubricity?Lubricity * The ability of a liquid to provide hydrodynamic and / or boundary lubrication to prevent wear between moving parts* LePera – quality that prevents wear when two moving metal parts come in contact with each otherEngine•Why lubricity is important?Petroleum Diesel/Petrodiesel •EPA – ULSD standard at < 15 ppm sulfur in diesel fuel•Removing sulfur: HydrotreatingC2H5SH + H2 C2H6 + H2S•Other impurities also removed; combined removal: –Lower lubricity–Other emission controls are less effectiveTruckers want a better lubricity for their engines!Biodiesel (B100)•Cost: highly variable depending on the season and the source of the biodiesel; in Seattle, there are at least three stations at which you can buy B100 for a lower price than petroleum diesel (as of April 2006)•Lubricity: much improved from petroleum diesel; can reduce engine wear by half•Emissions: practically carbon-neutral and reduces other harmful emissions dramatically; has up to 15% more NOX than petroleum diesel•Gel point: just below 32°FBiodiesel (B2)•B2 is a blend of 2% biodiesel and 98% diesel. •B2 offers the highest amount of lubricity for the least incremental cost. •The freezing point of B2 is around -35 degrees Celsius •The emissions are similar to that of regular diesel.FuelsBiodiesel (B100) Petroleum diesel Mixed (B2)Cost (Nationwide) $3.76$2.98 $2.97Lubricity (microns) 314 671 355Measured in how much “scarring” there is on the engineSourcesMain slide:http://faculty.northseattle.edu/tfurutani/che140/biodiesel.jpgLubricity slide: LePera, M. 2000. Low-sulfur and diesel fuel lubricity – The continuing saga. LePera and Associates. Fuel Line Magazine, Vol. 4, pp. 18-19Truck slide:http://www.800toolbox.com/Semi_dir/Semi_truck_illus.jpgEngine Slide: http://www.800toolbox.com/Semi_dir/Semi_truck_illus.jpgFuels slide:http://www.fuelgaugereport.com/http://www.eere.energy.gov/afdc/resources/pricereport/pdfs/afpr_jun_06.pdfSources (cont)•B2 slide: www.agriculture.state.ia.us/biodiesel.htmlwww.conservation.net/B2_biodiesel.htm•B100 slide: http://www.biodieselnow.comhttp://www.uidaho.edu/bioenergy/BiodieselEd/publication/06.pdfhttp://www.bio-beetle.com/bio_beetle_faqs.htmhttp://www.b100fuel.com/archives/2006/04/biodiesel_price.html •Petroleum slide: http://www.eia.doe.gov/oiaf/servicerpt/ulsd/chapt er3 .htmlhttp://www.dieselforu m.org/p olicy-insider/clean er-fuels-cleaner-engines/clean-fu
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