Why Biodiesel? Domestically produced (helps US farmers) Reduction in pollution It is a renewable resource Simple production process Works in existing infrastructure Today’s cars and trucks Today’s distribution system Today’s filling stations www.brevardbiodiesel.org
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A cooperative effort in Brevard County, Florida, to promote sustainable transportation fuels
1970s – Emergence of OPEC power – First oil crisis
Sudden American interest in fuel efficiency created a major diesel engine market in the U.S.
Today’s diesel engines are inherently 20% to 40% more fuel efficient than their gasoline counterparts (that’s why most trucks use them)
Unfortunately, General Motors got in the act and produced more than half the diesels sold in the US during the 1980s. Their diesels were just modified gasoline engines which proved very unreliable and poisoned Americans’ perception of diesels. Consequently:
Diesel share of US sales today: Mercedes: 6%VW: 5%
Diesel share of European car sales today: More than 40%
Almost any diesel-powered automobile, including:
By comparison, Gasoline evaporates easily at room temp which leads to both an easier (unsafe) ignition *and* more air pollution from spills/leaks.
More than 2 minutes to get it fully burning
Findings of government study "Life Cycle Inventory of Biodiesel and Petroleum Diesel for Use in an Urban Bus":
Life Cycle Comparison to gasoline and other fuels – Fleet CO2 emissions using:
Ethanol: 11 lbs/gallon
Methanol: 19.6 lbs/gallon
LPG: 13 lbs/gallon
Carbon Dioxide + Water + Sunlight >>> Glucose + Oxygen
CO2 + H2O + Energy >>> C6H12O6 + O2
Most fat is triglycerides: Triesters of fatty acids and glycerol
Esters & Free Fatty Acids
Saturated, Monounsaturated, and Polyunsaturated fats
Transesterification – transferring the esters from glycerin to methanol or ethanol
Methyl Esters (most Biodiesel)