Carbon Dioxide Decomposition by a Parallel-Plate Plasma Reactor: Experiments and 2-D Modelling

The applicability of high voltage electrical discharges for the decomposition of CO<sub>2</sub> has been extensively demonstrated. In this study, a new AC parallel-plate plasma reactor is presented which was designed for this purpose. Detailed experimental characterization and simulation...

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Autores principales:	Ali Barkhordari, Saeed Karimian, Antonio Rodero, Dorota Anna Krawczyk, Seyed Iman Mirzaei, Amir Falahat
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	CO<sub>2</sub> conversion gas chromatography optical emission spectroscopy 2-D fluid model Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/b4f4382fca20401cbf3284ca2c7c33c2
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spelling	oai:doaj.org-article:b4f4382fca20401cbf3284ca2c7c33c22021-11-11T15:07:32ZCarbon Dioxide Decomposition by a Parallel-Plate Plasma Reactor: Experiments and 2-D Modelling10.3390/app1121100472076-3417https://doaj.org/article/b4f4382fca20401cbf3284ca2c7c33c22021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10047https://doaj.org/toc/2076-3417The applicability of high voltage electrical discharges for the decomposition of CO<sub>2</sub> has been extensively demonstrated. In this study, a new AC parallel-plate plasma reactor is presented which was designed for this purpose. Detailed experimental characterization and simulation of this reactor were performed. Gas chromatography of the exhaust gases enabled calculation of the CO<sub>2</sub> conversion and energy efficiency. A conversion factor approximating 25% was obtained which is higher in comparison to existing plasma sources. Optical emission spectroscopy enabled the determination of the emission intensities of atoms and molecules inside the plasma and characterization of the discharge. The Stark broadening of the Balmer hydrogen line H<sub>β</sub> was used for the estimation of the electron density. The obtained densities were of the order of 5 × 10<sup>14</sup> cm<sup>−3</sup> which indicates that the electron kinetic energy dominated the discharge. The rotational, vibrational, and excitation temperatures were determined from the vibro-rotational band of the OH radical. A 2-temperature plasma was found where the estimated electron temperatures (~18,000 K) were higher than the gas temperatures (~2000 K). Finally, a 2-D model using the fluid equations was developed for determining the main processes in the CO<sub>2</sub> splitting. The solution to this model, using the finite element method, gave the temporal and spatial behaviors of the formed species densities, the electric potential, and the temperatures of electrons.Ali BarkhordariSaeed KarimianAntonio RoderoDorota Anna KrawczykSeyed Iman MirzaeiAmir FalahatMDPI AGarticleCO<sub>2</sub> conversiongas chromatographyoptical emission spectroscopy2-D fluid modelTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10047, p 10047 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	CO<sub>2</sub> conversion gas chromatography optical emission spectroscopy 2-D fluid model Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	CO<sub>2</sub> conversion gas chromatography optical emission spectroscopy 2-D fluid model Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Ali Barkhordari Saeed Karimian Antonio Rodero Dorota Anna Krawczyk Seyed Iman Mirzaei Amir Falahat Carbon Dioxide Decomposition by a Parallel-Plate Plasma Reactor: Experiments and 2-D Modelling
description	The applicability of high voltage electrical discharges for the decomposition of CO<sub>2</sub> has been extensively demonstrated. In this study, a new AC parallel-plate plasma reactor is presented which was designed for this purpose. Detailed experimental characterization and simulation of this reactor were performed. Gas chromatography of the exhaust gases enabled calculation of the CO<sub>2</sub> conversion and energy efficiency. A conversion factor approximating 25% was obtained which is higher in comparison to existing plasma sources. Optical emission spectroscopy enabled the determination of the emission intensities of atoms and molecules inside the plasma and characterization of the discharge. The Stark broadening of the Balmer hydrogen line H<sub>β</sub> was used for the estimation of the electron density. The obtained densities were of the order of 5 × 10<sup>14</sup> cm<sup>−3</sup> which indicates that the electron kinetic energy dominated the discharge. The rotational, vibrational, and excitation temperatures were determined from the vibro-rotational band of the OH radical. A 2-temperature plasma was found where the estimated electron temperatures (~18,000 K) were higher than the gas temperatures (~2000 K). Finally, a 2-D model using the fluid equations was developed for determining the main processes in the CO<sub>2</sub> splitting. The solution to this model, using the finite element method, gave the temporal and spatial behaviors of the formed species densities, the electric potential, and the temperatures of electrons.
format	article
author	Ali Barkhordari Saeed Karimian Antonio Rodero Dorota Anna Krawczyk Seyed Iman Mirzaei Amir Falahat
author_facet	Ali Barkhordari Saeed Karimian Antonio Rodero Dorota Anna Krawczyk Seyed Iman Mirzaei Amir Falahat
author_sort	Ali Barkhordari
title	Carbon Dioxide Decomposition by a Parallel-Plate Plasma Reactor: Experiments and 2-D Modelling
title_short	Carbon Dioxide Decomposition by a Parallel-Plate Plasma Reactor: Experiments and 2-D Modelling
title_full	Carbon Dioxide Decomposition by a Parallel-Plate Plasma Reactor: Experiments and 2-D Modelling
title_fullStr	Carbon Dioxide Decomposition by a Parallel-Plate Plasma Reactor: Experiments and 2-D Modelling
title_full_unstemmed	Carbon Dioxide Decomposition by a Parallel-Plate Plasma Reactor: Experiments and 2-D Modelling
title_sort	carbon dioxide decomposition by a parallel-plate plasma reactor: experiments and 2-d modelling
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/b4f4382fca20401cbf3284ca2c7c33c2
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Carbon Dioxide Decomposition by a Parallel-Plate Plasma Reactor: Experiments and 2-D Modelling

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