Saturday, 27 October 2007

1st Big batch!

Today I made a batch in the processor !

I moved 96 litres of Waste oil into the processor, heated to 55C and added the 21.5 litres of Methanol and NaOH. It then circulated for 2 hours and then settled for another hour. I then drained off from the bottom of the tank about 18 litres of dark red liquid (glycerin) until the liquid became a golden yellow/wheat colour.

Here's a sample:

It looks pretty cloudy as there's still a few impurities in there. These will drop out (and be filtered out) once the left over methanol is removed. This is done through evaporation (from heating or naturally to the surrounding air). I heated this sample on the hob and took it to about 70c (around 160F) for 5 mins. Once it had cooled a little I decanted it (there was a distinct puddle of dark "stuff" (liquid and a few lumps) in the bottom) and filtered it through a coffee filter (Google suggests a coffee filter is around 20 microns).
In this shot, you can see the line of the darker liquid and the line at the edge of the bio.

The resulting liquid is much clearer!

I also did a quick test known as the 3 in 27 or 3/27 test. You take 27ml of methanol and add 3ml of the biodiesel (ie the sample). once added, you shake/mix for 5 seconds and then look to see if there is any separation. If the process is incomplete, there will be a "bubble" (a bit like in a spirit level) under the methanol. if there is no bubble, it means the reaction is at or around 96% complete (which is good!). This batch had NO bubble!


LaDawn said...

stop using my kitchen utensils!

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Chris said...

I love the idea of making my own fuel...being almost entirely off the grid!

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betty said...

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Seed Cards AL said...

It's very interesting to learn how biodiesel's can be produced.

Seed Cards AL said...

Great article, i had no idea how biofuels were made or what they consist of. Good info, hope you get your blog going again.

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Virkrant Jadhav said...

Nice blog, biodiesel plant and refining used oil is need of the hour. It reduce carbon emission and reduces green house gases. According to study finepac is best Biodiesel Plant commissioner in world.