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Pyrolysis of рolyamide-сontaining materials. Process features and composition of reaction products (Review)статья
- Авторы: Zakharyan E.M., Maksimov A.L.
- Журнал: Russian Journal of Applied Chemistry
- Том: 95
- Номер: 7
- Год издания: 2022
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 895
- Последняя страница: 928
- DOI: 10.1134/S1070427222070011
- Аннотация: An enhance in the manufacturing and consumption of polyamide products used in the light, food, textile, construction, engineering, and medicine industries leads to the formation of large volumes of polyamide-containing waste that must be processed and disposed of. Thermal processing of polyamides in an inert atmosphere (pyrolysis), as well as polymer degradation in the presence of atmospheric oxygen, result in the formation of a large number of organic compounds—lactams, ketones, various nitriles, as well as carcinogenic polycyclic aromatic and nitrogencontaining compounds, including valuable organic products, used for further processing. In this regard, the questionarises of determining the optimal conditions for the polyamide-containing waste processing, under which the yield of valuable products increases and the amount of by-product, carcinogenic compounds is minimized. The review describes the features of the thermal degradation of polyamides and materials based thereon in an inert atmosphere and in the presence of atmospheric oxygen and the mechanisms of depolymerization of polyamides. The influence of the polymer structure, temperature, composition of the gaseous medium, fl ame retardant additives, and the presence of a catalyst on the formation of degradation products in the gas and condensed phases is considered. Co-pyrolysis of polyamides with other polymers brings about an increase in the yield of gaseous products and theformation of pyrolysis oil containing a smaller amount of oxygen-containing compounds, which indicates a copyrolysis synergistic effect. As an example of the pyrolysis of industrial polyamide-containing waste, the process of thermal degradation of fi shing net materials (both new commercial products and spent ones) is considered.
- Добавил в систему: Захарян Елена Михайловна