Synthesis of Biodiesel from Waste Cooking Oil - sciepub
Synthesis of Biodiesel from Canola Oil Using …
Process in the usual way using 20 to 30 litres of vegetable oil, agitate for one hour with temperature maintained at about 55 deg C.
This is enough methanol (10-15%) to produce a "split": the glycerin molecule is displaced and replaced by methanol molecules, forming methyl esters.
After one hour processing add another 30 or 40 litres of WVO to bring the total to 60 litres.
Process for another hour, maintaining heat at 55 deg C.
Settle overnight, separate the by-product, use the bioheating oil in your heater or burner.
More methyl ester is formed in the second hour after adding the extra WVO, but there will also be much higher amounts of unconverted and partly converted glycerides left than any biodiesel standards will allow -- this fuel is for your heater, NOT for your car!
Using the standard amount of lye for 60 litres means that all or most of the Free Fatty Acids are converted to soap and removed with the by-product along with the glycerine.
In fact the Free Fatty Acids make quite a good heating fuel when from the by-product "cocktail", but not as good as bioheating oil.
There's no need to take the trouble to wash bioheating oil.
Production of Biodiesel from Waste Vegetable Oil via …
How did you get to school today? Walk? Ride a bike? Catch a bus? Drive a car? What fuel powered your method of transportation? If you walked or biked, the fuel might have been a bowl of breakfast cereal. Many school buses use diesel fuel, which is made from crude oil that was formed over an incredibly long time by the decomposition of plants and animals. What if instead you could fill your not as crazy as it may at first sound.
These sources of fat or plant oil are potential starting materials for biodiesel, a type of renewable fuel that can be used in diesel engines. Renewable energy sources are those that can be replenished in a short period of time. The materials listed above can be obtained on a much smaller time scale than crude oil; for example, this can be as short as a single growing season for plants.
Crude oil resources, on the other hand, generate over such a long time that they are considered non-renewable.
There are various issues to consider with the different possible materials. For example, certain products that would normally be considered waste, such as used cooking oil headed for the landfill, could be turned into fuel instead. However, even if all the used cooking oil was turned into biodiesel, it would be only a tiny portion of the diesel fuel used in a year. The reaction to form biodiesel from a starting product might create its own difficulties. For example, the reaction that you will use in this investigation produces both biodiesel and glycerol. But, what to do with all the leftover glycerol? It can be used in an application such as soapmaking, but with the large amounts being generated, research is being done for other ways to use it. Canola oil, which comes from the crushed seeds of the canola plant, can be used as a starting material for biodiesel. The structure below shows a typical fat found in canola oil: