Energy and Environmental Assessment of Steam Management Optimization in an Ethylene Plant

Steam crackers (ethylene plants) belong to the most complex industrial plants and offer significant potential for energy-saving translated into the reduction of greenhouse gas emissions. Steam export to or import from adjacent units or complexes can boost the associated financial benefit, but its en...

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Autores principales:	Miroslav Variny, Kristián Hanus, Marek Blahušiak, Patrik Furda, Peter Illés, Ján Janošovský
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	greenhouse gases steam cracker energy management steam let-down fuel consumption carbon tax Medicine R
Acceso en línea:	https://doaj.org/article/0493d75813a74972bc575d63e30687d7
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spelling	oai:doaj.org-article:0493d75813a74972bc575d63e30687d72021-11-25T17:52:37ZEnergy and Environmental Assessment of Steam Management Optimization in an Ethylene Plant10.3390/ijerph1822122671660-46011661-7827https://doaj.org/article/0493d75813a74972bc575d63e30687d72021-11-01T00:00:00Zhttps://www.mdpi.com/1660-4601/18/22/12267https://doaj.org/toc/1661-7827https://doaj.org/toc/1660-4601Steam crackers (ethylene plants) belong to the most complex industrial plants and offer significant potential for energy-saving translated into the reduction of greenhouse gas emissions. Steam export to or import from adjacent units or complexes can boost the associated financial benefit, but its energy and environmental impact are questionable. A study was carried out on a medium-capacity ethylene plant using field data to: 1. Estimate the energy savings potential achievable by optimizing internal steam management and optimizing steam export/import; 2. Quantify the associated change in air pollutant emissions; 3. Analyze the impact of the increasing carbon price on the measures adopted. Internal steam management optimization yielded steam let-down rate minimization and resulted in a 5% (87 TJ/year) reduction in steam cracker’s steam boiler fuel consumption and the associated cut of CO<sub>2</sub> emissions by almost 4900 t/year and that of NO<sub>x</sub> emissions by more than 5 t/year. Steam import to the ethylene plant from the refinery proved to be purely economic-driven, as it increased the net fuel consumption of the ethylene plant and the refinery complex by 12 TJ/year and resulted in an increase of net emissions of nearly all considered air pollutants (more than 7000 t/year of CO<sub>2</sub>, over 15 t/year of NO<sub>x</sub>, over 18 t/year of SO<sub>x</sub>) except for CO, where the net change was almost zero. The effect of external emissions change due to the associated backpressure electricity production surplus (over 11 GWh/year) was too low to compensate for this increase unless fossil fuel-based electricity production was considered. The increase of carbon price impact on the internal steam management optimization economics was favorable, while a switch to steam export from the ethylene plant, instead of steam import, might be feasible if the carbon price increased to over 100 €/tCO<sub>2</sub>.Miroslav VarinyKristián HanusMarek BlahušiakPatrik FurdaPeter IllésJán JanošovskýMDPI AGarticlegreenhouse gasessteam crackerenergy managementsteam let-downfuel consumptioncarbon taxMedicineRENInternational Journal of Environmental Research and Public Health, Vol 18, Iss 12267, p 12267 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	greenhouse gases steam cracker energy management steam let-down fuel consumption carbon tax Medicine R
spellingShingle	greenhouse gases steam cracker energy management steam let-down fuel consumption carbon tax Medicine R Miroslav Variny Kristián Hanus Marek Blahušiak Patrik Furda Peter Illés Ján Janošovský Energy and Environmental Assessment of Steam Management Optimization in an Ethylene Plant
description	Steam crackers (ethylene plants) belong to the most complex industrial plants and offer significant potential for energy-saving translated into the reduction of greenhouse gas emissions. Steam export to or import from adjacent units or complexes can boost the associated financial benefit, but its energy and environmental impact are questionable. A study was carried out on a medium-capacity ethylene plant using field data to: 1. Estimate the energy savings potential achievable by optimizing internal steam management and optimizing steam export/import; 2. Quantify the associated change in air pollutant emissions; 3. Analyze the impact of the increasing carbon price on the measures adopted. Internal steam management optimization yielded steam let-down rate minimization and resulted in a 5% (87 TJ/year) reduction in steam cracker’s steam boiler fuel consumption and the associated cut of CO<sub>2</sub> emissions by almost 4900 t/year and that of NO<sub>x</sub> emissions by more than 5 t/year. Steam import to the ethylene plant from the refinery proved to be purely economic-driven, as it increased the net fuel consumption of the ethylene plant and the refinery complex by 12 TJ/year and resulted in an increase of net emissions of nearly all considered air pollutants (more than 7000 t/year of CO<sub>2</sub>, over 15 t/year of NO<sub>x</sub>, over 18 t/year of SO<sub>x</sub>) except for CO, where the net change was almost zero. The effect of external emissions change due to the associated backpressure electricity production surplus (over 11 GWh/year) was too low to compensate for this increase unless fossil fuel-based electricity production was considered. The increase of carbon price impact on the internal steam management optimization economics was favorable, while a switch to steam export from the ethylene plant, instead of steam import, might be feasible if the carbon price increased to over 100 €/tCO<sub>2</sub>.
format	article
author	Miroslav Variny Kristián Hanus Marek Blahušiak Patrik Furda Peter Illés Ján Janošovský
author_facet	Miroslav Variny Kristián Hanus Marek Blahušiak Patrik Furda Peter Illés Ján Janošovský
author_sort	Miroslav Variny
title	Energy and Environmental Assessment of Steam Management Optimization in an Ethylene Plant
title_short	Energy and Environmental Assessment of Steam Management Optimization in an Ethylene Plant
title_full	Energy and Environmental Assessment of Steam Management Optimization in an Ethylene Plant
title_fullStr	Energy and Environmental Assessment of Steam Management Optimization in an Ethylene Plant
title_full_unstemmed	Energy and Environmental Assessment of Steam Management Optimization in an Ethylene Plant
title_sort	energy and environmental assessment of steam management optimization in an ethylene plant
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/0493d75813a74972bc575d63e30687d7
work_keys_str_mv	AT miroslavvariny energyandenvironmentalassessmentofsteammanagementoptimizationinanethyleneplant AT kristianhanus energyandenvironmentalassessmentofsteammanagementoptimizationinanethyleneplant AT marekblahusiak energyandenvironmentalassessmentofsteammanagementoptimizationinanethyleneplant AT patrikfurda energyandenvironmentalassessmentofsteammanagementoptimizationinanethyleneplant AT peterilles energyandenvironmentalassessmentofsteammanagementoptimizationinanethyleneplant AT janjanosovsky energyandenvironmentalassessmentofsteammanagementoptimizationinanethyleneplant
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Energy and Environmental Assessment of Steam Management Optimization in an Ethylene Plant

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