EML4930L16

EML4930L16 - Sustainable Energy Science and Engineering...

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S ustainable E nergy S cience and E ngineering C enter Source: World Energy Outlook, 2006, IEA
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S ustainable E nergy S cience and E ngineering C enter US Biofuel Potential Source: Bryan M. Jenkins, UC Davis, Clean Tech. Workshop, 1/30/2007. BOE: Barrels of Oil Equivalent BGY: Billion Gallons per Year
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S ustainable E nergy S cience and E ngineering C enter Biofuel Classification Source: World Energy Book, 2006, Chapter 10
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S ustainable E nergy S cience and E ngineering C enter Biofuels Source: Bryan M. Jenkins, UC Davis, Clean Tech. Workshop, 1/30/2007.
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S ustainable E nergy S cience and E ngineering C enter Biomass to Liquids (BTL) Source: Bryan M. Jenkins, UC Davis, Clean Tech. Workshop, 1/30/2007.
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S ustainable E nergy S cience and E ngineering C enter Biodiesel From Vegetable Oil Vegetable oil is a much more dense substance than diesel but biodiesel is very similar to diesel fuel. Biodiesel benefits from a viscosity that is twice that of diesel fuel and a molecular weight is roughly 1/3 of vegetable oil. Most Diesel engines were designed to use highly lubricating, high sulfur content fuel. Recent environmental legislature has forced diesel fuel to contain only a minimum amount of sulfur for lubricating purposes. Thus, the high viscosity of biodiesel makes it a perfect fuel of choice for diesel engines. The process of converting vegetable oil into biodiesel fuel is called transesterification (1853). Transesterification: taking a triglyceride molecule, or a complex fatty acid, neutralizing the free fatty acids, removing the glycerin, and creating an alcohol ester. This is accomplished by mixing methanol with sodium hydroxide to make sodium methoxide. It is then mixed into vegetable oil. The entire mixture then settles. Glycerin is left on the bottom and methyl esters, or biodiesel, is left on top. The glycerin can be used to make soap and the methyl esters is washed and filtered. The resulting biodiesel fuel when used directly in a Diesel engine will burn up to 75% cleaner than petroleum diesel fuel.
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S ustainable E nergy S cience and E ngineering C enter Fuel Properties Property Ethanol Gasoline No. 2 Diesel Chemical Formula C2H5OH C4 to C12 C3 to C25 Molecular Weight 46.07 100Š105
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EML4930L16 - Sustainable Energy Science and Engineering...

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