The fuel obtained from waste polyolefin, every year will be able to meet 4% of demand for petrol or diesel.
Experts from Purdue University (USA) have demonstrated a new method of plastic recycling. According to them, it can be used to turn plastic into fuel, pure polymers or monomers. They hope that this will start the disposal industry. The paper was published in the journal ACS Sustainable Chemistry & Engineering, informs Rus.Media.
Over the last 50 years in landfills and in the natural environment has accumulated about five billion tons of plastic waste. Polypropylene (thermoplastic polymer of propylene) is 23 percent of this number. Processing would significantly reduce the accumulation of plastic in nature, but the staff of Purdue University is targeting a wider range of polymers. They offer technology that is capable of processing 90 percent of the polyolefin class of high-molecular compounds obtained from low molecular weight substances. It includes polypropylene.
“Our strategy is to create a power to dispose of and recycle polyolefin waste into various useful products including polymers, oil and clean fuel. Our technology is able to simultaneously increase the profits of the processing industry and reduce the global weight of plastic waste,” says lead researcher, Professor Linda Wang (Linda Wang).
The recycling process called hydrothermal liquefaction (hydrothermal liquefaction). According to Linda Wang, the polymers are melted at high temperature and dissolve in accreting water (the state of matter in which we lost the distinction between liquid and gas phase). Once the plastic turns into oil (a flammable liquid mixture of hydrocarbons), it can be used as raw materials or further divided into other products.
The researchers engaged in the topic because of fears for the future of the environment. In addition to conventional plastic, which in the amount of 8 million tons per year enters the ocean, gradually growing problem of contamination of living organisms, which are increasingly finding traces chropractic.
Last year chropractic found in human excreta. Scientists from the Vienna medical University (Austria) studied the diet and feces of eight people during the week. In the discharge of all eight volunteers, the scientists found particles acroplastica.