I have had success with palm oil using the two part alkali method. I use 5gm/litre NaOH and 120 mls of methanol/litre oil. Allow the oil to cool after melting as hot spots seem to boil off methanol. The glycerol at stage 1 settles well after 6hrs but is semisolid, before that it is liquid but the yield (glycerol) is low. I heat to ~60degrees C to get a good seperation. After stage two I add 1% water after I have heated the oil and glycerol to retrieve the methanol. This helps the glycerol to seperate, I will heat it enough to boil the water in a recalcitrent batch, 2% water at this stage will take out some soaps with little oil loss. I wash with 12ml/litre 35% HCl in 100% water and check PH after neutralisation of the Lye. (I am slowly reducing the HCl)The water breaks well from the product. If you didn'r remove the soap at stage 2 then the bubble wash may result in a floating semi solid foam of soap that is easy to remove. Otherwise it has always been a distinct layer between product and water. I find it is best to waste up to a litre(5%) of product in the soap, the product can be retrieved from the soap but affects gelling adversely. 20l oil gives about 2.5kg glycerol, 1litre soap and ~19litres of urine colored product. After washing I heat to 105 degrees to remove the water. In the mornings this product gells in the fuel drums and stays gelled longer than the cottonseed product. I have used it at up to 50% with no starting problems at 7gegrees C. The gell liquifies when shaken. 2.8litre turbo Pajero runs well on 100% cottonseed product but I would not use the palm oil product at 100% in winter. Even at 20% the motor seems smoother under load and runs a needle width cooler. Smoky emmissions are white not black and the fumes do not burn the eyes. Maybe the mixture changes the ignition process enough to avoid some of the gases that turn to acids on wet membranes. Tony is working on the old centripetal pump that we will use to compare power output on our stationary test motor, actual comparisons will follow. Regards Harry. --- In [EMAIL PROTECTED], "Biofuels" <[EMAIL PROTECTED]> wrote: > My tables show melting point of palm oil as being 30 - 38 deg C; methyl > ester 14 deg C and ethyl ester 10 deg C. > Palm oleine - 20 - 25; 5; 3 > Palm stearine 35 - 40; 21; 18 > Use it as a B20 mix in 80% petrodiesel - the low temperature properties of > the petro product enhance those of biodiesel. > Warm both to at least 30 deg C before mixing to ensure full integration. > You are still saving 18 to 22% emissions, so there need be no conscience > involved!
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