Biodiesel Recipe
A recipe for homemade biodiesel fuel. This the product created from this recipe is not intended for use in combustion engines, and should be used for testing purposes only.
- Put on protective gear
- Measure 50ml. of new vegetable oil; pour into 100ml beaker
- Heat oil to 50o on hot plate *Do Not Overheat*
- Measure 11ml. of methanol in 25ml. graduated cylinder; pour into 125ml Erlenmeyer flask and cap with rubber stopper.
- Weigh .2g potassium hydroxide and add to methanol
- Stopper the flask, and swirl mix for a few minutes, until lye is completely dissolved
- Potassium methoxide is now formed in the flask
- *Make sure oil is not over 60 degrees because methanol may boil*
- Add 50ml. of warm oil to methoxide in the flask and stopper tightly
- Shake vigorously for a few minutes
- Pour mixture into graduated cylinder and let sit overnight
- Dark layer of glycerol will form on the bottom; light layer of biodiesel will float on top
- Washing – many water-soluble materials still remain in the biodiesel after it settles, including soaps, methanol, lye, and glycerin. Washing the fuel afterwards gets rid of these impurities. One method involves bubble washing, by pouring water and biodiesel into a tank, the two liquids with form a layer with water on the bottom. By sending air bubbles from the water to the top, they will carry the water soluble materials. Once the bubble pops at the top, the water sinks again, capturing more of the impurities. This is an efficient use of water, and requires no expensive or complicated equipment.
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