Just tested my Biodiesel and it's got an high acid number around 2.0 ASTM limits are 0.5
I think the extended washing with a bubbler drove up the acid number on the finished product. Is this acid number of concern if I blend with petro diesel at say 25/75 bio/petro?
I just retested it. I think my stock solution was out the first time. This time I got 0.13 for my biodiesel. I also tested a 25% blend and got 0.04 and for the heck of it I also tested some pure diesel and got 0.01 acid number.
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