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Tuesday, March 29, 2011

How to turn plastic waste into diesel fuel cheaply

This is a landmark video. Thank you for sharing it Alex. I read up on it; see below. Still it is a shame to burn plastic as fuel when it could better serve (forever) by moulding it into other plastic things that last for ever ish. Still when you cost it all out 30 cent per litre fuel is a bargain...

I snooped around and discovered the process is well known, you can melt anything at 300 to 400 degrees and distill it as long as there is no oxygen in the mix to cause it to burn. The result varies, sugar cane to alcohol, tires distill into smelly fuel (sulfur smell), and so on. Steve
This other amazing guy and his team built a similar prototype and reveals all the details for do-it-yourself types:
How to turn plastic waste into diesel fuel cheaply

The process is really simple, it is similar to how alcohol is made. If you heat plastic waste in non oxygen environment, it will melt, but will not burn. After it has melted, it will start to boil and evaporate, you just need to put those vapors through a cooling pipe and when cooled the vapors will condense to a liquid and some of the vapors with shorter hydrocarbon lengths will remain as a gas. The exit of the cooling pipe is then going through a bubbler containing water to capture the last liquid forms of fuel and leave only gas that is then burned. If the cooling of the cooling tube is sufficient, there will be no fuel in the bubbler, but if not, the water will capture all the remaining fuel that will float above the water and can be poured off the water. On the bottom of the cooling tube is a steel reservoir that collects all the liquid and it has a release valve on the bottom so that the liquid fuel can be poured out. Here are some pictures to better understand the design:
Picture: http://www.emuprim.lv/jetijs/plog-content/thumbs/jeti-stuff/degviela-no-riep__m/large/1307-zupa-0011.jpg
I got 1000kg of sgredded plastic for around 50$, if all of this is turned into fuel, I get around one ton of diesel. Also the leftover small amount of charcoal can be used by pressing it into briquettes and burning it later in a stove.

The reactor chamber is made out of an old 50 liter steel propane tank,

you will only need around 8 cents worth of electricity per liter of fuel,
The quality of the fuel was already tested, it is about 90-95% diesel and 5-10% gasoline. This works great in liquid fuel burners. If you need it for a diesel engine, you just need to heat the fuel to abut 250 degrees till all gasoline evaporates and you now have pure diesel.

How to build one: permalink
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Bigger plants:

Plastic Turned Into Crude Oil by Plas2Fuel: Carbon Footprint Unknown : TreeHugger




Interesting opinions: