Siberian Federal University

This work studied the composition of products from the catalytic cracking of plastic waste mixtures consisting of polyethylene (low and high density), polypropylene, polystyrene, and polyethylene terephthalate in the presence of various zeolites. The introduction of zeolites significantly affects the distribution of gaseous and liquid products, as well as the nature of the resulting hydrocarbons. It was shown that with a total yield of liquid products of 79–83 % wt., their fractional and hydrocarbon composition significantly depends on the nature of the catalyst. Zeolites contribute to an increase in the yield of light fractions (up to 360 °C) compared to thermal cracking, providing an increase of up to 8.6 % by weight and shifting the distribution towards gasoline components. The yield of gaseous products during the catalytic cracking of plastic waste varies between 7.1–16.6 % wt. The most pronounced formation of gaseous products and light hydrocarbons is observed when using a zeolite with the highest concentration of acidic centers and moderate specific surface area. At the same time, a zeolite with a more developed surface and larger pores contributes to the yield of heavier fractions and reduces the share of light products