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Biodiesel: A Healthy And Flexible Alternative to Petroleum Diesel. Biodiesel: A General Definition. Biodiesel is not raw vegetable oil. It is produced by a chemical process that removes glycerin from the oil.
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Biodiesel: A Healthy And Flexible Alternative to Petroleum Diesel
Biodiesel: A General Definition • Biodiesel is not raw vegetable oil. It is produced by a chemical process that removes glycerin from the oil. • Biodiesel is a domestic, renewable fuel for diesel engines derived from natural oils such as soybean oil or recycled cooking oil that meets the specifications of ASTM D 6751. • Biodiesel is registered with the U.S. EPA as a legal fuel and has completed rigorous Tier I and Tier II Health Effects Testing. • Biodiesel can be used in any concentration with petroleum-based diesel fuel in existing diesel engines with little or no modification.
Biodiesel Production 100 lbs. of soybean oil + 10 lbs. methanol = 100 lbs. soy biodiesel (B100) + 10 lbs. of glycerin
Describing Biodiesel Blends • B100 = 100% Biodiesel • B20 = 80% Petroleum Diesel / 20% Biodiesel • 1500 gallons B100 + 6000 gallons petroleum = B20 Transport Load • B5 – 95% Petroleum Diesel / 5% Biodiesel
Biodiesel is a simple and effective alternative to Petroleum Diesel • Reduces harmful emissions • Runs in diesel engines with no modifications. • Uses existing fueling infrastructure. • Meets Federal Standards • Reduces petroleum dependence.
How Does Biodiesel Perform Compared to Petroleum Diesel Fuel? • High Cetane (>50 vs. 42) • Comparable BTU content • (120,000 BTU/gal vs. 126,000) • High lubricity (> 6000g vs 3100g SLBOCLE) • Readily mixes with diesel • Flashpoint exceeds 300 F
Diesel Exhaust and Health • Diesel Exhaust contains fine matter called Particulate Matter (PM) and other air toxics that negatively impact health • Children in and around school buses can be exposed to particulate concentrations that are 5 to 15 times higher than background levels • Exposure to PM is associated with aggravated conditions of asthma and bronchitis in developing lungs. • EPA has identified diesel exhaust as a probable human carcinogen.
What to do with what we have? Diesel Power is THE prime mover for school buses.
Public Health Risk Reduction Lovelace Research Institute 211(b) test results • NO pronounced toxicity at any level (B100) • NO mortality or clinical abnormality • NO neurotoxic or internal pathologic response • NO adverse effect on fertility and reproductive systems • Corroboration of Tier I findings concerning decreased mutagenicity activity in living organisms
HEAVY HC SPECIATION - CUMMINS N14 ENGINE B100 B20 2D octadecenoic acid methyl ester octadecadienoic acid methyl ester hexadecanoic acid methyl ester C18 n-octadecane C17 n-heptadecane diphenyl methanone trimethyl pentadecane C16 n-hexadecane trimethyl naphthalene methyl ethyl naphthalene 1.1'-biphenyl, 3-methyl- 1,1'-ethylidenebis-benzene C15 n-pentadecane 2,5-cyclohexadiene-1,4-dione tetramethyl hexadecane hexanedioic acid, bis methylethyl dimethyl naphthalene ethyl naphthalene C14 n-tetradecane trimethyl dodecane undecanol methyl naphthalene C13 n-tridecane tetrahydro dimethyl naphthalene methyl tridecane nonanoic acid hexyl cyclohexane dimethyl undecane C12 n-dodecane 1-dodecene butoxyethoxy ethanol nonanol octanoic acid (caprylic acid) ethyl dimethyl benzene benzoic acid C11 n-undecane methylisopropylbenzene phenyl ethanone C4-Benzene or C2-benzene methyl propyl benzene diethyl benzene ethyl hexanol Heptenoic acid, methyl ester C10 n-decane Heptanol ethyl methyl benzene C9 n-nonane xylene (dimethyl benzene) ethyl benzene tetramethyl butane 0 2 4 6 8 10 0 2 4 6 8 10 0 2 4 6 8 10 RELATIVE EMISSION RATE (MG/HP-HR) 0 2 4 6 8 10 Tier I Health Effects Data supplied by SWRI, 1997-8
Emissions Reductions B20 emissions reductions compared to petroleum diesel: • Carbon monoxide -20% • Unburned hydrocarbons -30% • Particulate matter -22% • Sulfates -20% • NPAH -50% • Mutagenicity -20%
US EPA 2006 ULSD Rule • How sulfur is removed from diesel fuel impacts its lubricity (hydrotreating) • Hydrotreating required to achieve the EPA mandated 15 ppm level for sulfur in on-road diesel fuel will cause a further reduction in the lubricity of the fuel (sulfur is known to “poison” the after-treatment devices required in 2007) • B100 is a sulfur-free fuel • Results of extensive testing (Stanadyne Automotive Corp.) have shown that low-levels of biodiesel (1-2%) provide the needed lubricity for use with ULSD • Fuel Injection Equipment manufacturers have an adopted limit of 460 micron wear scar diameter (WSD) – lower WSD better
Enhanced Lubricity • B2 has approx. 60% more lubricity than #2 Diesel
Federal Biodiesel Tax Credit • The new law took effect Jan. 1, 2005. • Creates a tax credit for biodiesel • $1 per gallon tax credit for each gallon of pure biodiesel made from virgin oils derived from agricultural products and animal fats • $.50 per gallon tax credit for each gallon of pure biodiesel made from other oils • All taxable gallons allow the credit to be claimed in both taxable and tax-exempt markets • Tax-exempt fleet fuel programs • Off-road diesel markets (dyed diesel) • Heating oil, Boiler Fuel, Power Generation • Streamlines the use of biodiesel at the terminal rack • The tax structure and credit will encourage petroleum blenders to blend biodiesel as far upstream as possible, which under the RFS or Minnesota’s 2% volume requirement will allow more biodiesel to be used in the marketplace
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