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Probing into Styrene Polymerization Runaway Hazards: Effects of the Monomer Mass Fraction

[Image: see text] Polymerization reactions have caused a number of serious incidents in the past; they are prone to reaction runaways because of their exothermic and autoaccelerating nature. To minimalize the risk, the reaction is commonly performed in a solvent as empirical industrial practice. In...

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Autores principales: Zhao, Lin, Zhu, Wen, Papadaki, Maria I., Mannan, M. Sam, Akbulut, Mustafa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6648732/
https://www.ncbi.nlm.nih.gov/pubmed/31459904
http://dx.doi.org/10.1021/acsomega.9b00004
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author Zhao, Lin
Zhu, Wen
Papadaki, Maria I.
Mannan, M. Sam
Akbulut, Mustafa
author_facet Zhao, Lin
Zhu, Wen
Papadaki, Maria I.
Mannan, M. Sam
Akbulut, Mustafa
author_sort Zhao, Lin
collection PubMed
description [Image: see text] Polymerization reactions have caused a number of serious incidents in the past; they are prone to reaction runaways because of their exothermic and autoaccelerating nature. To minimalize the risk, the reaction is commonly performed in a solvent as empirical industrial practice. In this work, the thermal runaway hazards of the ethylbenzene–styrene system with different monomer mass fractions were calorimetrically investigated up to temperatures where decomposition products are unlikely to be produced. Experiments showed that the polymerization runaway “onset” temperature inversely increased with the monomer mass fraction. Experiment and thermodynamic calculations showed that volatile diluent increased system vapor pressure even at a lower adiabatic temperature rise and verified that moderation of the risks could be achieved if the monomer mass fraction is below ca. 85%. A lumped kinetic model developed by Hui and Hamielec was used to predict the runaway profile of this reaction under different dilutions, and the agreement was excellent.
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spelling pubmed-66487322019-08-27 Probing into Styrene Polymerization Runaway Hazards: Effects of the Monomer Mass Fraction Zhao, Lin Zhu, Wen Papadaki, Maria I. Mannan, M. Sam Akbulut, Mustafa ACS Omega [Image: see text] Polymerization reactions have caused a number of serious incidents in the past; they are prone to reaction runaways because of their exothermic and autoaccelerating nature. To minimalize the risk, the reaction is commonly performed in a solvent as empirical industrial practice. In this work, the thermal runaway hazards of the ethylbenzene–styrene system with different monomer mass fractions were calorimetrically investigated up to temperatures where decomposition products are unlikely to be produced. Experiments showed that the polymerization runaway “onset” temperature inversely increased with the monomer mass fraction. Experiment and thermodynamic calculations showed that volatile diluent increased system vapor pressure even at a lower adiabatic temperature rise and verified that moderation of the risks could be achieved if the monomer mass fraction is below ca. 85%. A lumped kinetic model developed by Hui and Hamielec was used to predict the runaway profile of this reaction under different dilutions, and the agreement was excellent. American Chemical Society 2019-05-03 /pmc/articles/PMC6648732/ /pubmed/31459904 http://dx.doi.org/10.1021/acsomega.9b00004 Text en Copyright © 2019 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Zhao, Lin
Zhu, Wen
Papadaki, Maria I.
Mannan, M. Sam
Akbulut, Mustafa
Probing into Styrene Polymerization Runaway Hazards: Effects of the Monomer Mass Fraction
title Probing into Styrene Polymerization Runaway Hazards: Effects of the Monomer Mass Fraction
title_full Probing into Styrene Polymerization Runaway Hazards: Effects of the Monomer Mass Fraction
title_fullStr Probing into Styrene Polymerization Runaway Hazards: Effects of the Monomer Mass Fraction
title_full_unstemmed Probing into Styrene Polymerization Runaway Hazards: Effects of the Monomer Mass Fraction
title_short Probing into Styrene Polymerization Runaway Hazards: Effects of the Monomer Mass Fraction
title_sort probing into styrene polymerization runaway hazards: effects of the monomer mass fraction
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6648732/
https://www.ncbi.nlm.nih.gov/pubmed/31459904
http://dx.doi.org/10.1021/acsomega.9b00004
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