Thermal destruction of polymers: analysis of the process physicochemical parameters
Keywords:solid household waste, destruction, pyrolysis, synthesis gas, hydrocarbons, polymers
This experimental study has confirmed that during thermal decomposition of polymeric waste samples at a temperature of 850 °C, without oxygen access, there is a 90 % drop in the mass of this waste with the release of a large volume of gaseous products. This feature should be taken into consideration in the engineering calculations of reaction chambers, reactors, and connecting gas pipelines. The analytical study was carried out by a method of thermodynamic analysis using the universal estimation system Astra (TERRA). It has been shown that with an increase in reaction temperature there is a change in the composition of the products of thermal destruction of polymeric waste by reducing the mole fraction of СН4 and increasing the proportion of Н2. The calorific value was calculated according to Mendeleev’s empirical formula. The experimental study (a pyrolysis-gas chromatography method) has confirmed the calculation results regarding an increase in the proportion of hydrogen in the gaseous products of destruction with an increase in process temperature. As a result, due to the lower volumetric heat of hydrogen combustion, the total caloric content of the synthesis gas obtained is significantly reduced. For the experiments, a laboratory installation of low-temperature pyrolysis of polymers with external supply of thermal energy was built, and synthesis gas was used as an energy carrier.
At the experimental-industrial installation, by a low-temperature pyrolysis method, the synthesis gas of a stable composition with a lower heat of combustion of 24.8 kJ/m3 was obtained. The reliability of the results of the proposed estimation method to the results of instrumental measurements has been shown.
Promising areas of further studies have been determined, including the optimization of processes of thermal destruction of chlorine-containing polymer waste; the effective use of hydrogen from the composition of the synthesis gas obtained.
Martignon, G. P.; Johansson, I., Edo, M. (Eds.) (2020). Report on Trends in the use of solid recovered fuels. IEA Bioenergy. Available at: https://www.ieabioenergy.com/wp-content/uploads/2020/05/Trends-in-use-of-solid-recovered-fuels-Main-Report-Task36.pdf
Plastics - the Facts 2020. PlasticsEurope. Available at: https://www.plasticseurope.org/application/files/5716/0752/4286/AF_Plastics_the_facts-WEB-2020-ING_FINAL.pdf
Ciuffi, B., Chiaramonti, D., Rizzo, A. M., Frediani, M., Rosi, L. (2020). A Critical Review of SCWG in the Context of Available Gasification Technologies for Plastic Waste. Applied Sciences, 10 (18), 6307. doi: https://doi.org/10.3390/app10186307
Comanita, E.-D., Hlihor, R. M., Ghinea, C., Gavrilescu, M. (2016). Occurrence of plastic waste in the environment: ecological and health risks. Environmental Engineering and Management Journal, 15 (3), 675–685. doi: https://doi.org/10.30638/eemj.2016.073
Singh, D., Sotiriou, G. A., Zhang, F., Mead, J., Bello, D., Wohlleben, W., Demokritou, P. (2016). End-of-life thermal decomposition of nano-enabled polymers: effect of nanofiller loading and polymer matrix on by-products. Environmental Science: Nano, 3 (6), 1293–1305. doi: https://doi.org/10.1039/c6en00252h
Communication from the Commission to the European Parliament, the Council, the European Economic and Social Committee and the Committee of the Regions. A European Strategy for Plastics in a Circular Economy (2018). COM/2018/028 final. European Commission. Available at: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=COM:2018:28:FIN
Saebea, D., Ruengrit, P., Arpornwichanop, A., Patcharavorachot, Y. (2020). Gasification of plastic waste for synthesis gas production. Energy Reports, 6, 202–207. doi: https://doi.org/10.1016/j.egyr.2019.08.043
Wróblewska-Krepsztul, J., Rydzkowski, T. (2020). Pyrolysis and incineration in polymer waste management system. Journal of Mechanical and Energy Engineering, 3 (4), 337–342. doi: https://doi.org/10.30464/jmee.2019.3.4.337
Posada, E., Saenz, G. (2019). Waste to Energy and Syngas. Sustainable Alternative Syngas Fuel [Working Title]. doi: https://doi.org/10.5772/intechopen.85848
Fedorov, L. A. (1993). Dioksiny kak ekologicheskaya opasnost': Retrospektiva i perspektivy. Moscow: Nauka, 266.
Karp, I. N., Vasechko, A. A., Alekseenko, V. V., Sezonenko, A. B. (2011). Tekhnologii utilizatsii meditsinskih othodov. Energotekhnologii i resursosberezhenie, 3, 43–48.
Vasechko, O. O., Sezonenko, O. B., Aleksieienko, V. V., Samokatov, K. A. (2019). Utylizatsiya polimernykh ta ridkykh medychnykh spyrtomisnykh vidkhodiv. Zb. tez XXXVII naukovo-tekhnichnoi konferentsiyi molodykh vchenykh ta spetsialistiv Instytutu problem modeliuvannia v enerhetytsi im. H.Ye. Pukhova NAN Ukrainy. Kyiv, 73–75. Available at: https://ipme.kiev.ua/wp-content/uploads/2019/05/%D0%9C%D0%B0%D1%82%D0%B5%D1%80%D1%96%D0%B0%D0%BB%D0%B8-%D0%BA%D0%BE%D0%BD%D1%84%D0%B5%D1%80%D0%B5%D0%BD%D1%86%D1%96%D1%97-2019.pdf
Aleksieienko, V. V., Vasechko, O. O., Sezonenko, O. B. (2021). Pat. No. 148052. Ustanovka dlia utylizatsiyi vidkhodiv, shcho mistiat vuhlevoden. No. u202100537; declareted: 09.02.2021; published: 30.06.2021, Bul. No. 26. Available at: https://base.uipv.org/searchINV/search.php?action=viewdetails&IdClaim=276891&sid=678651d55fe4935ea5ae1eeea0b1fa15
Ustinov, V. A., Kozlita, A. N., Lyulkin, M. S. (2011). Accounting chemistry of the process when selecting the temperature regime in the pyrolysis unit. Elektronniy nauchniy zhurnal «Neftegazovoe delo», 3, 208–214. Available at: https://pdf.zlibcdn.com/dtoken/472649e9e9385da0fe9731b14041ee6d/Vuebor_temperaturnogo_rezhima_v_apparate_piroliza__3184328_(z-lib.org).pdf
PSA Hydrogen Purification Plants | Mahler AGS. Available at: https://www.mahler-ags.com/hydrogen/hydroswing/
How to Cite
Copyright (c) 2021 Oleksii Sezonenko, Oleksii Vasechko, Viktor Aleksyeyenko
This work is licensed under a Creative Commons Attribution 4.0 International License.
The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.