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United States Department of Agriculture

Agricultural Research Service

Research Project: VEGETABLE OIL-BASED FUELS, ADDITIVES AND COPRODUCTS

Location: Bio-oils Research Unit

Title: Cetane numbers of biodiesel and its components

Author
item Knothe, Gerhard

Submitted to: American Oil Chemists' Society Meeting
Publication Type: Abstract Only
Publication Acceptance Date: November 3, 2012
Publication Date: April 28, 2013
Citation: Knothe, G.H. 2013. Cetane numbers of biodiesel and its components [abstract]. American Oil Chemists' Society Meeting. p. 34.

Technical Abstract: The cetane number is one of the prime fuel quality indicators of a petrodiesel or biodiesel fuel as it relates to the tendency of the fuel to ignite in the combustion chamber. It has been established that compound structure, including chain length, branching, and the presence of double bonds, is a major factor influencing the cetane number. With more potential feedstocks for biodiesel such as inedible oils and algae receiving increasing interest, fatty acid profiles, hitherto unknown in biodiesel, affect its properties including the cetane number. In light of these developments, the cetane numbers of some neat fatty acid methyl esters, for example highly polyunsaturated fatty acid methyl esters (C20:4 and C22:6) and esters with varying double bond positions found in these biodiesel fuels were determined. They can be evaluated in conjunction with previous results on more common esters which is a focus of this presentation.

Last Modified: 4/19/2014
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