[Biofuel] Dark Biodiesel

[Thomas Kelly]

Hello To All,      I get very dark WVO from a Chinese restaurant. I tested a sample and found virtually no water. It titrated at 1.3g/L. Usually my WVO gets mixed together, but I ran a 20gal. batch using only this oil. It washed (stir-washed) very easily. The finished BD was clear down to below 40F, but was very dark. I reprocessed a .5L sample  ----> NO glycerine dropped out. A 25ml. sample dissolved completely in 225ml methanol. It appeared to be very high quality BD. I've been running it in my car and I responded to a question by Danislov K. regarding dark BD. I told him that if it passed these quality tests it should be OK to use.    BUT: In going back over the Quality Tests described at JtF .....      Alex Kac wrote: Deeper color biodiesel has a lot of glycerine in it in the form of various glycerids. Not good for standard engines. Remedy: If the diesel is too dark and you are sure that you used the correct quantitie(s) of catalyst(s), add a pinch more alcohol -- you could be losing it due to evaporation."       - Did I give Danislov the wrong advice???     - If glycerine "in the form of various glycerids" was present in the finished BD wouldn't it show up upon reprocessing?     - Is it possible to have high quality BD that is very dark in color?                                           Tom              _______________________________________________ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/