According to foreign media reports, low-density polyethylene, which is usually used to make a variety of items, can be recycled into new plastics, but the current recycling facilities cannot handle so much waste. With this in mind, scientists have devised a method that can convert this material into something else—jet fuel.
The research team led by Associate Professor Hanwu Lei of Washington State University started with low-density polyethylene waste obtained from plastic bags, milk cartons and water bottles. They grinded the plastic into particles about 3 mm in diameter or about one meter in size.
These particles were then placed in a tubular reactor placed on top of the activated carbon bed. Subsequently, the plastic and carbon are heated to 430-571 ° C and a thermal decomposition process called thermal cracking occurs. Through the catalytic action of carbon, the plastic decomposes and releases the hydrogen content stored inside.
After testing seven different types of activated carbon, the research team finally extracted 85% of aviation fuel and 15% of diesel fuel from plastic. These fuels can be separated from each other, and carbon can also be separated for subsequent reuse, and can be reactivated once it begins to lose catalytic effect.
On the whole, this is a very effective process, and it is said that there is not much problem if you want to expand it to the industrial level.
Lei said: "We can recover almost 100% of the energy from the tested plastics. The quality of this fuel is very good, and the by-product gas produced by it is not only of high quality but also very useful."
Related research reports have been published in "Applied Energy". Perhaps British Airways will be interested in this research result, because the company has announced plans to convert waste into aviation fuel.
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