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Energies 2018, 11(8), 2014; https://doi.org/10.3390/en11082014

Effect of Sodium Chloride and Thiourea on Pollutant Formation during Combustion of Plastics

Department of Chemical Engineering, University of Alicante, P.O. Box 99, E-03080 Alicante, Spain
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Received: 10 July 2018 / Revised: 30 July 2018 / Accepted: 31 July 2018 / Published: 2 August 2018
(This article belongs to the Special Issue 10 Years Energies - Horizon 2028)
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Abstract

Thermal decomposition of different samples containing a mixture of plastics (polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and nylon) combined with NaCl and metal oxides (Fe2O3, CuO) was studied under an air atmosphere at 850 °C using a reactor, followed by analysis of the evolved products. Combustion runs were performed to study how the presence of such compounds influences the production of pollutants. Here, we report the analyses of the emissions of the main gases, as well as volatiles and semivolatiles, including polyaromatic hydrocarbons (PAHs), polychlorinated benzenes and phenols, and polybrominated phenols. Results show that the production of chlorinated pollutants did not increase in the presence of NaCl, but the presence of other metals during the decomposition led to the production of a great amount of pollutants. In this regard, the emission of chlorinated phenols increased from 110 to ca. 250 mg/kg when the sample included a small quantity of a transition metal oxide. Additionally, the presence of an inhibitor—thiourea (TUA)—was tested. Results confirm that adding TUA to the sample reduced these emissions to a considerable extent, with the emission of chlorinated phenols amounting to 65 mg/kg. View Full-Text
Keywords: plastic mixture; PAHs; ClBzs; NaCl; catalyzed medium; inhibition plastic mixture; PAHs; ClBzs; NaCl; catalyzed medium; inhibition
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Iñiguez, M.E.; Conesa, J.A.; Fullana, A. Effect of Sodium Chloride and Thiourea on Pollutant Formation during Combustion of Plastics. Energies 2018, 11, 2014.

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