Utilization of polymer waste by pyrolysis in compositions with peat

There is an intensive growth of polymer production all over the world. Annually, the industry consumes more than 150 million tons of plastics 85 %, of which are thermoplastics and 15 % thermosetting polymers. According to experts, the consumption of plastics in the world has increased to 1 t/year per person, which has significantly exacerbated the problem of recycling and reuse of such waste underground disposal is the most environmentally unfavorable option associated with both the irretrievable loss of material and energy, and the gradual release of toxic substances (dioxins, furans). Less common is the energy, which is associated with the need for effective purification of flue gases from toxic combustion products, which is very costly.

Pyrolysis is used as a prospective direction of polymer-containing waste recovery mixed combinations of peat with polymers requiring processing. The most representative and typical for the republic samples of polymer waste to be disposed of, were selected, followed by the preparation of mixed compositions based on them in various combinations of components with two types of peat (top and lowland), their thermal degradation was carried out under various pyrolysis conditions and the material balance of the products obtained was compiled. The qualitative and quantitative composition of pyrolysis products are estimated on the example of the gas phase. The efficiency of the method of utilization of mixed compositions with the production of more high-calorie thermal degradation products has been confirmed. It is revealed that the conversion depth of mixed compositions significantly depends on the pyrolysis conditions and the composition of the initial components.

A method of utilization of polymer waste by pyrolysis of peat polymer compositions is proposed, which allows obtaining a resin fraction with a higher yield and pyrolysis gas with a significantly higher heat of combustion as an energy carrier, which gives reason to consider it as a highly efficient energy carrier in the production of thermal and electrical energy. The value of the resulting solid pyrolysis residue consists in the possibility of using it as both a building material and, in the future, raw materials for the manufacture of various sorbents.

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