草榴短视频

Scientists of Department of Chemical Technologies named after prof. A.A. Kharkharov in Saint-Petersburg State University o Industrial Technologies and Design have learned to recycle polypropylene and turn it into diesel fuel. Currently, the material from which disposable tableware, bottles, pipes, housings of household appliances, vehicle parts, office and much more are produced makes up a significant part of the waste entering landfills. Polypropylene decomposes in nature for tens and hundreds of years.

鈥淭he best brands of diesel fuel contain 40-50% of higher paraffins. Experimentally we established the temperature regime and modification conditions of polypropylene in order to obtain a composition corresponding to these diesel brands as a result. Our result is 55% higher paraffins. Such diesel fuel is used today in freight transport, trains, tractors, ships, airplanes, but motorists often switch to diesel,鈥� said Anna Mikhailovskaya, professor of the Department of 草榴短视频.

草榴短视频 specialists conducted test both on polypropylene granules and on crushed polypropylene rubbish, namely disposable tableware. They managed to obtain fuel using hydrocracking, a chemical process aimed at splitting the carbon skeleton and saturating the substance with hydrogen. The main reagent of the chemical reaction taking place in a reactor operating under pressure at a temperature of 320 掳 C was hydrogen. Before placing polypropylene into the reactor, scientists treated it with a special organic solution.

鈥淭he unique of our technology is that it can be implemented at any enterprise: at waste processing plants, plastic production enterprises. The environmental component is very important here, because at the moment in Russia polypropylene is mainly processed by mechanical methods, there are no widespread methods of its chemical processing, especially since we get alternative fuel at the output, which means we save national resources,鈥� added Anna Mikhailovskaya.

The scientists plan to scale up the tests to determine the quantitative indicators of the chemical process, which will allow building an accurate model of the introduction of technology into industry.