High Voltage Separation of Glycerol Presentation Transcript
High Voltage Separation of Biodiesel from Glycerin G. Austic, R. Burton, S. Shore, Piedmont Biofuels, Pittsboro, North Carolina, U.S.A. 2nd International Congress on Biodiesel: The Science and The Technologies 15-17 November 2009 Munich, Germany
The goal: create a continuous separation step for biodiesel
Graham Laming, a biodiesel enthusiast from the UK, initially discovered the phenomenon for glycerin separation from biodiesel.
Expanding on his work, we tested the following variables:
electrode types (point, line, and screens)
Eventually, we created a continuous separation device using this technology which separated 99.7% of glycerin running at 4L/min.
While the technology was interesting, we did not currently have an application, and we were concerned about the application of voltage through a methanol laden system (!).
Variables of Interest
The hypothesis is that charged particles exist in the glycerin.
When an electric current is passed through, the charged particles line up and clump together.
After clumping the globule is large enough to fall out of solution.
Three mini-batches were made of 0%, 2%, and 6% FFA
Vegetable oil was blended with Oleic Acid to create the FFA%