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The Biodiesel Education Program at the University of Idaho is sponsored in part by the USDA Biodiesel TechNotes are published by the Department of Biological and Agricultural Engineering at the University of Idaho
 

Summary: N O T E S
The Biodiesel Education Program at the University of Idaho is sponsored in part by the USDA
Biodiesel TechNotes are published by the Department of Biological and Agricultural Engineering at the University of Idaho
www.BiodieselEducation.org biodiesel@uidaho.edu 208-885-7626
Using Adsorbents to
Lower FFA Levels in
Biodiesel Feedstocks
As any biodiesel producer knows, feedstock is the most
expensive part of the biodiesel production process. Lower-
cost feedstocks, such as animal fat or used vegetable oil, are
frequently of lower quality, containing a higher percentage of
free fatty acids (FFAs) that will react with an alkaline catalyst
to make soap. This soap must be removed from the biodiesel.
Currently, the most common methods for dealing with free
fatty acids tend to be expensive and/or cumbersome. For
example, pre-treatment with an enzyme catalyst can be
expensive. Acid pre-treatment requires the addition of a lot
of hazardous sulfuric acid and alcohol.
Distillation, also known as steam
stripping, requires millions of dollars of

  

Source: Alves-Foss, Jim - Department of Computer Science, University of Idaho

 

Collections: Computer Technologies and Information Sciences