Boreskov Institute of Catalysis of the Siberian Branch of Russian ...

PP-V-7ResultsThe presented technology provides almost 100 % conversion of organic part of feedstock. At that the yield of liquid products is 85-90 % for polyolefins and PS, and 45-60 % forrubber material (the content of sulfur in products is 0.4-1.1 %). Liquid products have acomposition and boiling point range close to those of fuel fractions.Products’ composition varies depending on type of raw materials. In case of PS the liquidproducts contain 85-95 % of alkyl-aromatics; in case of PP – 70-80 % of highly branchedsaturated and unsaturated hydrocarbons; in case of PE – 60-85 % of saturated and unsaturatedlinear hydrocarbons. The liquid products of destruction of rubber boiling below 185 °Ccontain about 55-65 % of uncondensed aromatics and fraction boiling in the range 185-300 °Ccontain about 10-20 % of condensed aromatics.In order to convert products of polymers’ destruction into components of fuel fractions itwas necessary they undergo the hydrotreating for hydrogenation of olefins andhydrodesulfurization. The hydrotreating was carried out in the autoclave. The hydrogenationof unsaturated hydrocarbons was carried out under 220-240 °C and 25-35 bar in the presenceof Ni-containing heterogeneous catalyst that provided 80-95% conversion of double bonds.The hydrodesulfurization was carried out under 300-340 °C and 25-40 bar in the presence ofAl-Co-Mo heterogeneous catalyst that resulted in 80-95 % degree of sulfur removing.ConclusionThe results obtained allow formulation of general approach to technology of thermal andthermal-catalytic processing of polymeric wastes into fuel fractions.470