From Chemistry Towards Technology Step-By-Step From Chemistry Towards Technology Step-By-Step От химии к технологии шаг за шагом 2782-1900 81570 10.52957/27821900_2023_01_142 Научные статьи Scientific articles Научные статьи Modelling of rubber thermal degradation kinetics during the pyrolysis of rubber waste Modelling of rubber thermal degradation kinetics during the pyrolysis of rubber waste https://orcid.org/0000-0002-8840-248X Соловьев Михаил Евгеньевич Soloviev Mikhail Evgen'evich

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 https://orcid.org/0000-0002-2970-6109 Каблов Виктор Федорович Kablov Viktor F. vkablov5@gmail.com

доктор технических наук;

doctor of technical sciences;

 https://orcid.org/0000-0002-1917-7979 Балдаев Сергей Львович Baldaev Sergey L'vovich

кандидат технических наук;

candidate of technical sciences;

 Федорова Мария Олеговна Fedorova Maria Olegovna Ярославский государственный технический университет Ярославль Россия Ярославский государственный технический университет Ярославль Russian Federation Волжский политехнический институт филиал Волгоградского государственного технического университета Volzhsky Polytechnic Institute, branch of the Volgograd State Technical University ООО «Технологические системы защитных покрытий» Россия ООО «Технологические системы защитных покрытий» Russian Federation 23 03 2023 23 03 2023 4 1 142 156 12 01 2023 22 03 2023 https://chemintech.ru/en/nauka/article/81570/view

The paper presents the kinetic model of polymer thermodegradation as applied to the process of pyrolysis of worn-out tyres and waste rubber products in an industrial reactor. We calculated the quantum-chemical changes of thermodynamic functions for the probable chemical reactions of mesh elastomer degradation. Solid fraction (carbon black and metal wastes) and vapor-gas mixture separated into three hydrocarbon fractions considered as the reaction products. We use a formal kinetic scheme when describing the kinetics of rubber degradation. It shows the mechanism of the process as a set of radical-chain reactions of polymer degradation. Each hydrocarbon fraction corresponds to a certain set of kinetic constants, the temperature dependences of which are assumed to be Arrhenius. The satisfactory agreement of the obtained calculated thermogravimetric de-pendences with the experimental data of different authors allowed us to approximate the rubber thermal degradation curves by the curves characterizing the general-purpose rubbers.

The paper presents the kinetic model of polymer thermodegradation as applied to the process of pyrolysis of worn-out tyres and waste rubber products in an industrial reactor. We calculated the quantum-chemical changes of thermodynamic functions for the probable chemical reactions of mesh elastomer degradation. Solid fraction (carbon black and metal wastes) and vapor-gas mixture separated into three hydrocarbon fractions considered as the reaction products. We use a formal kinetic scheme when describing the kinetics of rubber degradation. It shows the mechanism of the process as a set of radical-chain reactions of polymer degradation. Each hydrocarbon fraction corresponds to a certain set of kinetic constants, the temperature dependences of which are assumed to be Arrhenius. The satisfactory agreement of the obtained calculated thermogravimetric de-pendences with the experimental data of different authors allowed us to approximate the rubber thermal degradation curves by the curves characterizing the general-purpose rubbers.

 worn tyres rubber waste pyrolysis kinetic model quantum-chemical calculation

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