“In chemistry, everything that requires energy to make will release energy when it’s broken,” said lead author Pablo Cruz-Morales from the Technical University of Denmark.
When petroleum jet fuel is ignited, it releases a tremendous amount of energy in order to give planes enough lift to escape gravity.
The researchers recreated a molecule called Jawsamycin - named after the movie Jaws because of its bite-like indentations - by using the common bacteria streptomyces.
“The recipe already exists in nature,” Cruz-Morales said. The jagged molecule is produced by native metabolism of the bacteria as they munch away on gl“As they eat sugar or amino acids, they break them down and convert them into building blocks for carbon-to-carbon bonds,” he said. “You make fat in your body in the same way, with the same chemistry, but this bacterial process has some very interesting twists.”
These twists, which give the molecules their explosive properties, are the incorporation of cyclopropane rings: rings of three carbon atoms arranged in a triangular shapeThe plastic waste was melted at a high temperature with activated carbon - a processed carbon with increased surface area - to produce jet fuel.
“Waste plastic is a huge problem worldwide,” said Hanwu Lei (pictured below), an associate professor in WSU’s Department of Biological System Engineering. “This is a very good, and relatively simple, way to recycle these plastics.”
In the experiment, Lei and colleagues tested low-density polyethylene and mixed a variety of waste plastic products - such as water bottles, milk bottles and plastic bags - and ground them down to beads of around three millimetres, approximately the size of a grain of rice.
The plastic granules were then placed on top of activated carbon in a tube reactor at a high temperature, ranging from 430°C to 571°C.
E&T
The carbon acts as a catalyst, or a substance that speeds up a chemical reaction without being consumed by the reaction.
“Plastic is hard to break down,” Lei said. “You have to add a catalyst to help break the chemical bonds. There is a lot of hydrogen in plastics, which is a key component in fuel.”
Once the carbon catalyst has done its work, it can be separated out and re-used on the next batch of waste plastic conversion. The catalyst can also be regenerated after losing its activity.
After testing several different catalysts at different temperatures, the best result was a combination of 85 per cent jet fuel and 15 per cent diesel fuel.
According to the Environmental Protection Agency (EPA), landfills in the US received 26 million tons of plastic in 2015, the most recent year for which statistics are available.
Meanwhile, China recently stopped accepting plastic recycling from the US and Canada to stem the tide of hazardous “foreign garbage”.
Conservative estimates by scientists say that at least 4.8 million tons of plastic enters the ocean each year worldwide. Not only would this new process reduce that waste, very little of what is produced is wasted..
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So also there are ways to regenerate natural fuels
Always remember a thing that is the natural fuels are not unlimited on earth everyone wants to recycle the plastic and use another things without plastic and that will be good for our ecosystem and this will provide our ecosystem more strength and ability with without of pollution most of the peoples uses so much polluted things like plastic and so on so try to use natural things and gases and fuel.
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