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Biodiesel acid pre-treatment

 
Posts: 122
Location: Sacramento
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I'm in a biodiesel class and the subject of acid pre-treating high-FFA oil with H2SO4 has come up.  However, neither the instructors nor any students know the why it works.  Can someone explain  the what and why to me?
 
Thanks tiny ad, for helping me escape the terrible comfort of this chair.
Rocket Mass Heater Manual - now free for a while
https://permies.com/goodies/8/rmhman
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