Numerical modeling of plasma gasification process of polychlorinated biphenyl wastes

The plasma gasification process is one of the most innovative and efficient methods for the disposal of various wastes and energy production. But it is still an extremely complicated process; therefore, to optimize it, modeling could be used as an invaluable asset. The aim of this study is to develo...

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Autores principales:	Armin Okati, Mohammad Reza Khani, Babak Shokri, Eliseu Monteiro, Abel Rouboa
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Gasification Aspen Plus Thermal plasma Polychlorinated biphenyl Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/9750a58e8c2a40f69e68ab4c50b3c910
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spelling	oai:doaj.org-article:9750a58e8c2a40f69e68ab4c50b3c9102021-11-18T04:49:48ZNumerical modeling of plasma gasification process of polychlorinated biphenyl wastes2352-484710.1016/j.egyr.2021.07.123https://doaj.org/article/9750a58e8c2a40f69e68ab4c50b3c9102021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2352484721005898https://doaj.org/toc/2352-4847The plasma gasification process is one of the most innovative and efficient methods for the disposal of various wastes and energy production. But it is still an extremely complicated process; therefore, to optimize it, modeling could be used as an invaluable asset. The aim of this study is to develop a computational model to evaluate the plasma gasification process of polychlorinated biphenyl wastes. The model was created in Aspen Plus® commercial software. It is based on the principle of Gibbs free energy minimization. The results acquired in this research were validated by the data in the literature. It has to be noted that satisfactory results have been obtained. Also, air, steam, and carbon dioxide were considered as oxidizers and the effects of various parameters such as temperature, equivalence ratio (ER), steam-to-waste (S/W) ratio, and carbon dioxide-to-waste (CO2/W) ratio on the production of syngas components were investigated. The results show that processing this hazardous waste leads to the production of a large percentage of acidic gases, which demands a gas cleaning unit in such treatment facilities. The results also show that PCBs with lower chlorine atoms are favorable to the production of higher-quality syngas. The increase of the gasifier temperature turns the waste into purer syngas. However, after the temperature of 1200 ºC the results showed that the major constituents of syngas reach almost a constant molar fraction. A steam-to-waste ratio of 0.5 can be used to produce syngas with greater percentage of hydrogen and fewer pollutants. The use of CO2 as gasifying agent led to the production of large amounts of CO. Conclusion could be drawn that this process can be considered safe and very effective while processing the aforementioned hazardous wastes and in the production of high-quality syngas.Armin OkatiMohammad Reza KhaniBabak ShokriEliseu MonteiroAbel RouboaElsevierarticleGasificationAspen PlusThermal plasmaPolychlorinated biphenylElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENEnergy Reports, Vol 7, Iss , Pp 270-285 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Gasification Aspen Plus Thermal plasma Polychlorinated biphenyl Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Gasification Aspen Plus Thermal plasma Polychlorinated biphenyl Electrical engineering. Electronics. Nuclear engineering TK1-9971 Armin Okati Mohammad Reza Khani Babak Shokri Eliseu Monteiro Abel Rouboa Numerical modeling of plasma gasification process of polychlorinated biphenyl wastes
description	The plasma gasification process is one of the most innovative and efficient methods for the disposal of various wastes and energy production. But it is still an extremely complicated process; therefore, to optimize it, modeling could be used as an invaluable asset. The aim of this study is to develop a computational model to evaluate the plasma gasification process of polychlorinated biphenyl wastes. The model was created in Aspen Plus® commercial software. It is based on the principle of Gibbs free energy minimization. The results acquired in this research were validated by the data in the literature. It has to be noted that satisfactory results have been obtained. Also, air, steam, and carbon dioxide were considered as oxidizers and the effects of various parameters such as temperature, equivalence ratio (ER), steam-to-waste (S/W) ratio, and carbon dioxide-to-waste (CO2/W) ratio on the production of syngas components were investigated. The results show that processing this hazardous waste leads to the production of a large percentage of acidic gases, which demands a gas cleaning unit in such treatment facilities. The results also show that PCBs with lower chlorine atoms are favorable to the production of higher-quality syngas. The increase of the gasifier temperature turns the waste into purer syngas. However, after the temperature of 1200 ºC the results showed that the major constituents of syngas reach almost a constant molar fraction. A steam-to-waste ratio of 0.5 can be used to produce syngas with greater percentage of hydrogen and fewer pollutants. The use of CO2 as gasifying agent led to the production of large amounts of CO. Conclusion could be drawn that this process can be considered safe and very effective while processing the aforementioned hazardous wastes and in the production of high-quality syngas.
format	article
author	Armin Okati Mohammad Reza Khani Babak Shokri Eliseu Monteiro Abel Rouboa
author_facet	Armin Okati Mohammad Reza Khani Babak Shokri Eliseu Monteiro Abel Rouboa
author_sort	Armin Okati
title	Numerical modeling of plasma gasification process of polychlorinated biphenyl wastes
title_short	Numerical modeling of plasma gasification process of polychlorinated biphenyl wastes
title_full	Numerical modeling of plasma gasification process of polychlorinated biphenyl wastes
title_fullStr	Numerical modeling of plasma gasification process of polychlorinated biphenyl wastes
title_full_unstemmed	Numerical modeling of plasma gasification process of polychlorinated biphenyl wastes
title_sort	numerical modeling of plasma gasification process of polychlorinated biphenyl wastes
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/9750a58e8c2a40f69e68ab4c50b3c910
work_keys_str_mv	AT arminokati numericalmodelingofplasmagasificationprocessofpolychlorinatedbiphenylwastes AT mohammadrezakhani numericalmodelingofplasmagasificationprocessofpolychlorinatedbiphenylwastes AT babakshokri numericalmodelingofplasmagasificationprocessofpolychlorinatedbiphenylwastes AT eliseumonteiro numericalmodelingofplasmagasificationprocessofpolychlorinatedbiphenylwastes AT abelrouboa numericalmodelingofplasmagasificationprocessofpolychlorinatedbiphenylwastes
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Numerical modeling of plasma gasification process of polychlorinated biphenyl wastes

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