Kinetics of thermal de-chlorination of PVC under pyrolytic conditions
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/22873 |
Resumo: | Although PVC-containing wastes are an important potential source of energy they are frequently disposed in landfill. In thermal treatment processes such as pyrolysis and gasification, the presence of poly(- vinyl chloride) (PVC), a compound with 56.7% of chlorine, may cause problems concerned with environmental protection, as consequence of the formation of hydrochloric acid, chlorine gas and dioxins, as well as corrosion phenomena of the reactor/equipment materials. Thus, a possible solution may involve a previous removal of the chlorine from PVC containing waste through a pyrolysis process at low temperatures before the material being submitted to a subsequent thermal treatment, for energetic valorization. In this work, a kinetic model for the thermal decomposition of PVC has been developed, in view of its de-chlorination. DTA/TGA testing at different temperatures indicated a first order reaction and an activation energy of 133,800 J/mol. An almost completed de-chlorination reaction was obtained at 340 C under an inert atmosphere. The resulted material is a CnHn type polymer with potential to be used in an energy recovery process. Validation test performed at laboratory scale indicate that the temperature of 340 C enables the removal of 99.9% of the chlorine present in PVC. The chloride can be fixed in the form of an aqueous solution of HCl or calcium chloride, driving to an alternative full process with environmental benefits and reduction of the costs associated to the PCV – containing materials/wastes management. |
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Kinetics of thermal de-chlorination of PVC under pyrolytic conditionsDe-chlorinationPyrolysisPVCKineticsScience & TechnologyAlthough PVC-containing wastes are an important potential source of energy they are frequently disposed in landfill. In thermal treatment processes such as pyrolysis and gasification, the presence of poly(- vinyl chloride) (PVC), a compound with 56.7% of chlorine, may cause problems concerned with environmental protection, as consequence of the formation of hydrochloric acid, chlorine gas and dioxins, as well as corrosion phenomena of the reactor/equipment materials. Thus, a possible solution may involve a previous removal of the chlorine from PVC containing waste through a pyrolysis process at low temperatures before the material being submitted to a subsequent thermal treatment, for energetic valorization. In this work, a kinetic model for the thermal decomposition of PVC has been developed, in view of its de-chlorination. DTA/TGA testing at different temperatures indicated a first order reaction and an activation energy of 133,800 J/mol. An almost completed de-chlorination reaction was obtained at 340 C under an inert atmosphere. The resulted material is a CnHn type polymer with potential to be used in an energy recovery process. Validation test performed at laboratory scale indicate that the temperature of 340 C enables the removal of 99.9% of the chlorine present in PVC. The chloride can be fixed in the form of an aqueous solution of HCl or calcium chloride, driving to an alternative full process with environmental benefits and reduction of the costs associated to the PCV – containing materials/wastes management.ElsevierUniversidade do MinhoCastro, AlexandraSoares, DelfimVilarinho, CândidaCastro, F.2012-052012-05-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/22873eng0956-053X10.1016/j.wasman.2012.01.00422321895info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:43:05Zoai:repositorium.sdum.uminho.pt:1822/22873Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:40:29.847004Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Kinetics of thermal de-chlorination of PVC under pyrolytic conditions |
title |
Kinetics of thermal de-chlorination of PVC under pyrolytic conditions |
spellingShingle |
Kinetics of thermal de-chlorination of PVC under pyrolytic conditions Castro, Alexandra De-chlorination Pyrolysis PVC Kinetics Science & Technology |
title_short |
Kinetics of thermal de-chlorination of PVC under pyrolytic conditions |
title_full |
Kinetics of thermal de-chlorination of PVC under pyrolytic conditions |
title_fullStr |
Kinetics of thermal de-chlorination of PVC under pyrolytic conditions |
title_full_unstemmed |
Kinetics of thermal de-chlorination of PVC under pyrolytic conditions |
title_sort |
Kinetics of thermal de-chlorination of PVC under pyrolytic conditions |
author |
Castro, Alexandra |
author_facet |
Castro, Alexandra Soares, Delfim Vilarinho, Cândida Castro, F. |
author_role |
author |
author2 |
Soares, Delfim Vilarinho, Cândida Castro, F. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Castro, Alexandra Soares, Delfim Vilarinho, Cândida Castro, F. |
dc.subject.por.fl_str_mv |
De-chlorination Pyrolysis PVC Kinetics Science & Technology |
topic |
De-chlorination Pyrolysis PVC Kinetics Science & Technology |
description |
Although PVC-containing wastes are an important potential source of energy they are frequently disposed in landfill. In thermal treatment processes such as pyrolysis and gasification, the presence of poly(- vinyl chloride) (PVC), a compound with 56.7% of chlorine, may cause problems concerned with environmental protection, as consequence of the formation of hydrochloric acid, chlorine gas and dioxins, as well as corrosion phenomena of the reactor/equipment materials. Thus, a possible solution may involve a previous removal of the chlorine from PVC containing waste through a pyrolysis process at low temperatures before the material being submitted to a subsequent thermal treatment, for energetic valorization. In this work, a kinetic model for the thermal decomposition of PVC has been developed, in view of its de-chlorination. DTA/TGA testing at different temperatures indicated a first order reaction and an activation energy of 133,800 J/mol. An almost completed de-chlorination reaction was obtained at 340 C under an inert atmosphere. The resulted material is a CnHn type polymer with potential to be used in an energy recovery process. Validation test performed at laboratory scale indicate that the temperature of 340 C enables the removal of 99.9% of the chlorine present in PVC. The chloride can be fixed in the form of an aqueous solution of HCl or calcium chloride, driving to an alternative full process with environmental benefits and reduction of the costs associated to the PCV – containing materials/wastes management. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-05 2012-05-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/22873 |
url |
http://hdl.handle.net/1822/22873 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0956-053X 10.1016/j.wasman.2012.01.004 22321895 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799132950928818176 |