Effect of using activated carbon and graphene oxide on the microwave assisted pyrolysis of expanded polystyrene waste
DOI:
https://doi.org/10.33448/rsd-v11i16.37920Keywords:
Polystyrene waste; Catalyst; Waste treatment.Abstract
Polymers are increasingly present in everyday life to replace other materials. Because they are cheap and have attractive mechanical properties, they were and still are produced on a large scale and, consequently, their large volumes in landfills present a challenge for their recycling. Thus, the objective of this study was to evaluate the depolymerization of expanded polystyrene (EPS) waste through the use of microwaves using two agents that have carbon in their constitution to assist in depolymerization: graphene oxide (GO) and activated carbon (AC). Different amounts of GO and AC (0.125, 0.25, 0.5 g) were used, always keeping the mass of the EPS sample constant at 1 g. The tests in the microwave oven were performed in 3 cycles of 4 minutes each, with a total time of 12 minutes per batch. Inside the oven, the sample was placed inside a round-bottomed flask wrapped with rock wool. To characterize the material obtained from depolymerization, a mass balance was performed to evaluate the depolymerization yields associated with Fourier Transform Infrared Spectroscopy (FTIR) and thermogravimetric analysis (TGA). For the sample containing 0.125 g of GO, it was observed the formation of a larger solid fraction, little gaseous fraction and no liquid fraction. The sample with 0.25 g of GO showed the best yield of volatiles, with 22.58% of volatiles, and it was possible to observe both the liquid and the gaseous fractions. When AC catalyst was used the depolymerization extension was lower than GO. Samples containing with 0.125, 0.250 and 0.5 g of AC yielded gaseous fractions of 5.13; 9.16; and 3.06, respectively. In FTIR analysis it was not possible identify the formation of new bands for samples treated with GO or AC, when compared with EPS. Some new degradation peaks, when compared with EPS, were observed in TGA for samples that used GO as catalyst; which can be associated with the formation of more volatile compounds after depolymerization. The samples treated with AC showed a less pronounced reduction in its thermal stability. This study suggests that the heat transfer from the dark particle to the EPS sample is more effective when GO is used which may contribute to the depolymerization of EPS wastes.
References
Adnan, J.S. & Jan, M.R. (2017). Recovery of valuable hydrocarbons from waste polystyrene using zinc supported catalysts. Journal of Polymers and the Environment, Vol. 25, pp. 759-769.
Bartoli, M., Rosi, L., Frediani, M., Undri, A., & Frediani, P. (2015). Depolymerization of polystyrene at reduced pressure through a microwave assisted pyrolysis. Journal of Analytical and Applied Pyrolysis, Vol. 113, pp. 281-287.
Bhattacharya, M. & Basak, T. (2016). A review on the susceptor assisted microwave processing of materials. Energy, Vol. 97, pp. 306-338.
Ferreira, S.D.; Bassanesi, G.R.; Lazzaroto, I.P.; Poletto, P.; Godinho, M. & Osório, E. (2017). Preparação e caracterização de carvão quimicamente ativado com K2CO3 a partir do biochar de capim elefante. 57º Congresso Brasileiro de Química. Gramado-RS.
Hayashi, J.; Uchibayashi, M.; Horikawa, T.; Muroyama, K. & Gomes, V.G. (2002). Synthesizing activated carbons from resins by chemical activation with K2CO3. Carbon, Vol 40, n. 15, p. 2747–2752.
Hussain, Z., Mohammed Khan, K., Perveen, S., Hussain, K., & Voelter, W. (2012). The conversion of waste polystyrene into useful hydrocarbons by microwave-metal interaction pyrolysis. Fuel Processing Technology, Vol. 94, No 1, pp. 145-150.
Kumar, P.S.; Bharathikumar, M.; Prabakharam, C.; Vijavam, S. & Ramakrishnan, K. (2015). Conversion of waste plastics into low-emissive hydrocarbon fuels through catalytic depolymerization in a new laboratory scale batch reactor. International Journal of Energy and Environmental Engineering, Vol. 8, pp. 167-173.
Lavoratti, A.; Zattera, A.J.; Amico, S.C. (2019). Mechanical and dynamic-mechanical properties of silanized graphene oxide/epoxy composites. Journal of Polymer Research, Vol. 26, 140, pp. 1-10.
Li, K., Chen, J., Chen, G., Peng, J., Ruan, R., & Srinivasakannan C. (2019). Microwave dielectric properties and thermochemical characteristics of the mixtures of walnut shell and manganese ore. Bioresource Technology, Vol 286, pp.121381.
Marco, P.de. & Poletto, M. (2022). Microwave assisted pyrolysis of expanded polystyrene waste using carbon black catalyst. Research, Society and Development, v. 11, n. 11, p. e518111134058.
Menéndez, J.A, Arenillas, A., Fidalgo, B., Fernández, Y., Zubizarreta, L., Calvo, E.G., & Bermudez Menendez, J. (2010). Microwave heating processes involving carbon materials. Fuel Processing Technology, Vol 91, pp. 1–8.
Mo, Y., Zhao, L., Chen, C.L., Tan, G.Y.A., & Wang, J-Y. (2013). Comparative pyrolysis upcycling of polystyrene waste: thermodynamics, kinetics, and product evolution profile. Journal of Thermal Analysis and Calorimetry, Vol. 111, pp. 781–788.
Morais, M. de O. & Vidigal, H. (2021). The reverse logistics process applied to the EPS product (ISOPOR). Research, Society and Development, Vol. 10, n. 2, p. e52910212908.
Oliveira, M. de; Poletto, M. & Severo, T.C. (2018). Rota química para produção de óxido de grafeno a partir de oxidação do grafite comercial. Revista Interdisciplinar de Ciência Aplicada, Vol. 3. pp. 16-20.
Pinto, M.V.S.; Silva, D.L.; Saraiva, A.C.F. (2013). Obtenção e caracterização de carvão ativado de caroço de buriti (Mauritia flexuosa L. f.) para a avaliação do processo de adsorção de cobre (II). Acta Amazonica, Vol. 43, n. 1, p. 73-80.
Prathiba, R., Shruthi, M., & Miranda, L.R. (2018). Pyrolysis of polystyrene waste in the presence of activated carbon in conventional and microwave heating using modified thermocouple. Waste Management, Vol. 76, pp. 528-536.
Rosi, L., Bartoli, M., & Frediani, M. (2018). Microwave assisted pyrolysis of halogenated plastics recovered from waste computers. Waste Management, Vol. 73, pp. 511-522.
Silva, J. C. da ., Santos, L. J. da C. ., Lustosa, S. M. C. ., Silva, G. de A. ., Paz, G. M. da ., Viana, D. dos S. F. & Viana, V. G. F. (2022) Thermal and toxicological analysis of commercial polystyrene with recycled polystyrene, Research, Society and Development, Vol. 11, No1, p. e55911124904.
Streit, A.F.M. (2016). Resíduos Poliméricos: quantificação, caracterização, lavagem e tratamento do efluente gerado no processo. 2016. 126 f. Dissertação (mestrado em engenharia química) – Universidade Federal de Santa Maria. Santa Maria.
Suriapparao, D.V., Nagababu, G., Yerrayya, A., & Sridevi, V. (2021). Optimization of microwave power and graphite susceptor quantity for waste polypropylene microwave pyrolysis. Process Safety and Environmental Protection, Vol. 149, pp 234-243.
Undri, A., Frediani, M., Rosi, L., & Frediani, P. (2014). Reverse polymerization of waste polystyrene through microwave assisted pyrolysis. Journal of Analytical and Applied Pyrolysis, Vol. 105, pp. 35-42.
Rex, P., Masilamani, I.P., & Miranda, L.M. (2020). Microwave pyrolysis of polystyrene and polypropylene mixtures using different activated carbon from biomass. Journal of the Energy Institute, Vol. 93, No 5, pp .1819-1832.
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