Comparison of Equilibrium-Stage and Rate-Based Models of a H2S Scrubber for Purification of Coke Oven Gas

In recent years, one of the most important challenges worldwide is to meet increasingly stricter environmental regulations while maintaining the profitability of plants. Modelling particular parts of existing technologies can help efficient operation, reduce energy consumption, minimize emissions, a...

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Autores principales:	Nikolett Rado-Foty, Attila Egedy, Lajos Nagy, Ivan Hegedus
Formato:	article
Lenguaje:	EN
Publicado:	AIDIC Servizi S.r.l. 2021
Materias:	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895
Acceso en línea:	https://doaj.org/article/b50285b21231436ebd30f805594fb904
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id	oai:doaj.org-article:b50285b21231436ebd30f805594fb904
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spelling	oai:doaj.org-article:b50285b21231436ebd30f805594fb9042021-11-15T21:48:48ZComparison of Equilibrium-Stage and Rate-Based Models of a H2S Scrubber for Purification of Coke Oven Gas10.3303/CET21880362283-9216https://doaj.org/article/b50285b21231436ebd30f805594fb9042021-11-01T00:00:00Zhttps://www.cetjournal.it/index.php/cet/article/view/11829https://doaj.org/toc/2283-9216In recent years, one of the most important challenges worldwide is to meet increasingly stricter environmental regulations while maintaining the profitability of plants. Modelling particular parts of existing technologies can help efficient operation, reduce energy consumption, minimize emissions, and keep operating costs low. Furthermore, adequately validated models provide the opportunity to examine different equipment designs, operating parameters side by side without hindering the technological process. The coke oven gas purification technology of a Hungarian coke oven plant was studied in this research work. As a by-product of coke production, approximately 40,000 - 60,000 m3 crude coke oven gas is generated every hour, which has to be cleaned before being used for energy purposes. First, the cooled crude coke oven gas is fed into the hydrogen sulfide scrubber in a counter-current flow. Then, the hydrogen sulfide is absorbed in an ammonia-rich washing liquid coming from the following two ammonia scrubbers. In this study, two mathematical models, equilibrium-stage and rate-based models, were used to simulate the removal of H2S from coke oven gas in the Aspen Plus process simulator program. The validation of the models was performed by using the operating measurements of the outlet streams. The results closely approximate the measured composition of the outflows. However, the simulation results predicted by the rate-based model show better agreement than the equilibrium model compared with the experimental data. With the use of the rate-based model, a sensitivity analysis was made, taking into account the parameters that have a tremendous impact on the cleaning process and can also be controlled by appropriate intervention. The creation of this model was the first step in building the simulation of the entire gas purification process, which will be used to optimize the operation and create an operator training system.Nikolett Rado-FotyAttila EgedyLajos NagyIvan HegedusAIDIC Servizi S.r.l.articleChemical engineeringTP155-156Computer engineering. Computer hardwareTK7885-7895ENChemical Engineering Transactions, Vol 88 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895
spellingShingle	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895 Nikolett Rado-Foty Attila Egedy Lajos Nagy Ivan Hegedus Comparison of Equilibrium-Stage and Rate-Based Models of a H2S Scrubber for Purification of Coke Oven Gas
description	In recent years, one of the most important challenges worldwide is to meet increasingly stricter environmental regulations while maintaining the profitability of plants. Modelling particular parts of existing technologies can help efficient operation, reduce energy consumption, minimize emissions, and keep operating costs low. Furthermore, adequately validated models provide the opportunity to examine different equipment designs, operating parameters side by side without hindering the technological process. The coke oven gas purification technology of a Hungarian coke oven plant was studied in this research work. As a by-product of coke production, approximately 40,000 - 60,000 m3 crude coke oven gas is generated every hour, which has to be cleaned before being used for energy purposes. First, the cooled crude coke oven gas is fed into the hydrogen sulfide scrubber in a counter-current flow. Then, the hydrogen sulfide is absorbed in an ammonia-rich washing liquid coming from the following two ammonia scrubbers. In this study, two mathematical models, equilibrium-stage and rate-based models, were used to simulate the removal of H2S from coke oven gas in the Aspen Plus process simulator program. The validation of the models was performed by using the operating measurements of the outlet streams. The results closely approximate the measured composition of the outflows. However, the simulation results predicted by the rate-based model show better agreement than the equilibrium model compared with the experimental data. With the use of the rate-based model, a sensitivity analysis was made, taking into account the parameters that have a tremendous impact on the cleaning process and can also be controlled by appropriate intervention. The creation of this model was the first step in building the simulation of the entire gas purification process, which will be used to optimize the operation and create an operator training system.
format	article
author	Nikolett Rado-Foty Attila Egedy Lajos Nagy Ivan Hegedus
author_facet	Nikolett Rado-Foty Attila Egedy Lajos Nagy Ivan Hegedus
author_sort	Nikolett Rado-Foty
title	Comparison of Equilibrium-Stage and Rate-Based Models of a H2S Scrubber for Purification of Coke Oven Gas
title_short	Comparison of Equilibrium-Stage and Rate-Based Models of a H2S Scrubber for Purification of Coke Oven Gas
title_full	Comparison of Equilibrium-Stage and Rate-Based Models of a H2S Scrubber for Purification of Coke Oven Gas
title_fullStr	Comparison of Equilibrium-Stage and Rate-Based Models of a H2S Scrubber for Purification of Coke Oven Gas
title_full_unstemmed	Comparison of Equilibrium-Stage and Rate-Based Models of a H2S Scrubber for Purification of Coke Oven Gas
title_sort	comparison of equilibrium-stage and rate-based models of a h2s scrubber for purification of coke oven gas
publisher	AIDIC Servizi S.r.l.
publishDate	2021
url	https://doaj.org/article/b50285b21231436ebd30f805594fb904
work_keys_str_mv	AT nikolettradofoty comparisonofequilibriumstageandratebasedmodelsofah2sscrubberforpurificationofcokeovengas AT attilaegedy comparisonofequilibriumstageandratebasedmodelsofah2sscrubberforpurificationofcokeovengas AT lajosnagy comparisonofequilibriumstageandratebasedmodelsofah2sscrubberforpurificationofcokeovengas AT ivanhegedus comparisonofequilibriumstageandratebasedmodelsofah2sscrubberforpurificationofcokeovengas
_version_	1718426807141662720

Comparison of Equilibrium-Stage and Rate-Based Models of a H2S Scrubber for Purification of Coke Oven Gas

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