One of the huge crises facing the global environment today is the proliferation of plastic waste. Since 60 years of mass production of plastics, 6.3 billion metric tons of plastic waste has been generated, of which 90.5% is unrecovered, and they are spread all over the world. If we do not change our lifestyle, there will be about 12 billion metric tons of plastic waste by 2050. With the deepening of scientific research, a potential solution is to turn these plastic waste into a usable fuel source.
A scientific research team from Purdue University has recently developed a new production process that can convert common types of plastic into fuel similar to gasoline or diesel. They published a paper in "ACS Sustainable Chemistry and Engineering", detailing how to convert polypropylene (commonly used in toys, medical devices and food packaging, etc.) into a fuel with sufficient purity for automobiles.
Purdue Research Foundation image / Vincent Walter
The researchers say that their conversion process uses supercritical water (that is, water with liquid and gas characteristics based on pressure and temperature conditions). They heated the water to between 716 and 932 degrees Fahrenheit and adjusted the pressure to 2,300 times the sea level. Plastic is then added to the mixture, and the purified polypropylene turns into oil, which can be converted in less than 1 hour at 850 degrees Fahrenheit.
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