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

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Title: Effect of Sodium Chloride and Thiourea on Pollutant Formation during Combustion of Plastics
Authors: Iñiguez, María Esperanza | Conesa, Juan A. | Fullana, Andres
Research Group/s: Residuos, Energía, Medio Ambiente y Nanotecnología (REMAN)
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Química
Keywords: Plastic mixture | PAHs | ClBzs | NaCl | Catalyzed medium | Inhibition
Knowledge Area: Ingeniería Química
Issue Date: 2-Aug-2018
Publisher: MDPI
Citation: Iñiguez ME, Conesa JA, Fullana A. Effect of Sodium Chloride and Thiourea on Pollutant Formation during Combustion of Plastics. Energies. 2018; 11(8):2014. doi:10.3390/en11082014
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.
Sponsor: This research was funded by Ministry of Economy, Industry and Competitiveness (Spain) grant number CTQ2016-76608-R, and by Valencian Community Government (Spain) grant number PROMETEOII/2014/007. The author M.E. Iñiguez was also funded by Ministry of Economy, Industry and Competitiveness (Spain) contract grant number BES-2014-069473.
URI: http://hdl.handle.net/10045/78368
ISSN: 1996-1073
DOI: 10.3390/en11082014
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Peer Review: si
Publisher version: https://doi.org/10.3390/en11082014
Appears in Collections:INV - REMAN - Artículos de Revistas

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