Pyrolysis of plastic wastes in a fountain confined conical spouted bed reactor: determination of stable operating conditions

[EN] The performance of both fluidized and spouted bed reactors in the pyrolysis of waste plastics is conditioned by particle agglomeration phenomena, which worsen the quality of the gas-solid contact and eventually lead to defluidization. The objective of this work is to determine the optimum condi...

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Autores: Orozco Hernández, Santiago, Álvarez Gordejuela, Jon, López Zabalbeitia, Gartzen, Artetxe Uria, Maite, Bilbao Elorriaga, Javier, Olazar Aurrecoechea, Martin
Formato: artículo
Fecha de publicación:2020
País:España
Recursos:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/49924
Acesso em linha:http://hdl.handle.net/10810/49924
Access Level:acceso abierto
Palavra-chave:defluidization
plastic waste
pyrolysis
conical spouted bed
fountain confinement
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spelling Pyrolysis of plastic wastes in a fountain confined conical spouted bed reactor: determination of stable operating conditionsOrozco Hernández, SantiagoÁlvarez Gordejuela, JonLópez Zabalbeitia, GartzenArtetxe Uria, MaiteBilbao Elorriaga, JavierOlazar Aurrecoechea, Martindefluidizationplastic wastepyrolysisconical spouted bedfountain confinement[EN] The performance of both fluidized and spouted bed reactors in the pyrolysis of waste plastics is conditioned by particle agglomeration phenomena, which worsen the quality of the gas-solid contact and eventually lead to defluidization. The objective of this work is to determine the optimum conditions for stable operation (without defluidization) in a bench scale plant fitted with a fountain confined conical spouted bed reactor and equipped with a nonporous draft tube, which operates in continuous mode. The insertion of these devices enhances the gas-solid contact, especially in the fountain region, and leads to a highly stable hydrodynamic regime, with these features being of especial relevance for the in situ catalytic pyrolysis of waste plastics. This paper deals with the effect different variables have on the minimum temperature for stable operation by avoiding defluidization. The variables analyzed are as follows: plastic type (HDPE, LDPE, PP, PS, PET and PMMA), plastic feed rate, mass of inert material in the bed, spouting velocity and use of catalyst. The results show that polymers whose chains decompose at low temperatures or have high degrees of branching require low operating temperatures. Besides, as the ratio of bed mass to plastic feed rate (Wbed/Qplastic) and/or spouting velocity were increased, the temperature required to avoid defluidization was also reduced. The use of a catalyst also reduced the temperature required for stable operation, as the activation energy of cracking reactions is greatly reduced, and so reaction rate is increased.This work was carried out with financial support from the Spain’s Ministries of Economy and Competitiveness (CTQ2016-75535-R (AEI/FEDER, UE)), Science, Innovation and Universities (RTI2018-098283-J-I00 (MINECO/FEDER, UE)) and Science and Innovation (PID2019-107357RB-I00 (AEI/FEDER, UE), the European Commission (HORIZON H2020-MSCA RISE-2018. Contract No. 823745) .and the Basque Government (IT1218-19 and KK-2020/00107).ElsevierEuropean Commission202120212020info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/49924reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoInglésinfo:eu-repo/grantAgreement/EC/H2020/823745info:eu-repo/grantAgreement/MINECO/CTQ2016-75535-R/info:eu-repo/grantAgreement/MCIU/RTI2018-101678-B-I00/info:eu-repo/grantAgreement/MCI/PID2019-107357RB-I00/https://doi.org/10.1016/j.enconman.2020.113768info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/3.0/es/© 2020 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 licenseoai:addi.ehu.eus:10810/499242026-06-18T09:23:17Z
dc.title.none.fl_str_mv Pyrolysis of plastic wastes in a fountain confined conical spouted bed reactor: determination of stable operating conditions
title Pyrolysis of plastic wastes in a fountain confined conical spouted bed reactor: determination of stable operating conditions
spellingShingle Pyrolysis of plastic wastes in a fountain confined conical spouted bed reactor: determination of stable operating conditions
Orozco Hernández, Santiago
defluidization
plastic waste
pyrolysis
conical spouted bed
fountain confinement
title_short Pyrolysis of plastic wastes in a fountain confined conical spouted bed reactor: determination of stable operating conditions
title_full Pyrolysis of plastic wastes in a fountain confined conical spouted bed reactor: determination of stable operating conditions
title_fullStr Pyrolysis of plastic wastes in a fountain confined conical spouted bed reactor: determination of stable operating conditions
title_full_unstemmed Pyrolysis of plastic wastes in a fountain confined conical spouted bed reactor: determination of stable operating conditions
title_sort Pyrolysis of plastic wastes in a fountain confined conical spouted bed reactor: determination of stable operating conditions
dc.creator.none.fl_str_mv Orozco Hernández, Santiago
Álvarez Gordejuela, Jon
López Zabalbeitia, Gartzen
Artetxe Uria, Maite
Bilbao Elorriaga, Javier
Olazar Aurrecoechea, Martin
author Orozco Hernández, Santiago
author_facet Orozco Hernández, Santiago
Álvarez Gordejuela, Jon
López Zabalbeitia, Gartzen
Artetxe Uria, Maite
Bilbao Elorriaga, Javier
Olazar Aurrecoechea, Martin
author_role author
author2 Álvarez Gordejuela, Jon
López Zabalbeitia, Gartzen
Artetxe Uria, Maite
Bilbao Elorriaga, Javier
Olazar Aurrecoechea, Martin
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv European Commission
dc.subject.none.fl_str_mv defluidization
plastic waste
pyrolysis
conical spouted bed
fountain confinement
topic defluidization
plastic waste
pyrolysis
conical spouted bed
fountain confinement
description [EN] The performance of both fluidized and spouted bed reactors in the pyrolysis of waste plastics is conditioned by particle agglomeration phenomena, which worsen the quality of the gas-solid contact and eventually lead to defluidization. The objective of this work is to determine the optimum conditions for stable operation (without defluidization) in a bench scale plant fitted with a fountain confined conical spouted bed reactor and equipped with a nonporous draft tube, which operates in continuous mode. The insertion of these devices enhances the gas-solid contact, especially in the fountain region, and leads to a highly stable hydrodynamic regime, with these features being of especial relevance for the in situ catalytic pyrolysis of waste plastics. This paper deals with the effect different variables have on the minimum temperature for stable operation by avoiding defluidization. The variables analyzed are as follows: plastic type (HDPE, LDPE, PP, PS, PET and PMMA), plastic feed rate, mass of inert material in the bed, spouting velocity and use of catalyst. The results show that polymers whose chains decompose at low temperatures or have high degrees of branching require low operating temperatures. Besides, as the ratio of bed mass to plastic feed rate (Wbed/Qplastic) and/or spouting velocity were increased, the temperature required to avoid defluidization was also reduced. The use of a catalyst also reduced the temperature required for stable operation, as the activation energy of cracking reactions is greatly reduced, and so reaction rate is increased.
publishDate 2020
dc.date.none.fl_str_mv 2020
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10810/49924
url http://hdl.handle.net/10810/49924
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/EC/H2020/823745
info:eu-repo/grantAgreement/MINECO/CTQ2016-75535-R/
info:eu-repo/grantAgreement/MCIU/RTI2018-101678-B-I00/
info:eu-repo/grantAgreement/MCI/PID2019-107357RB-I00/
https://doi.org/10.1016/j.enconman.2020.113768
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
© 2020 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/3.0/es/
© 2020 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
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:Addi. Archivo Digital para la Docencia y la Investigación
instname:Universidad del País Vasco
instname_str Universidad del País Vasco
reponame_str Addi. Archivo Digital para la Docencia y la Investigación
collection Addi. Archivo Digital para la Docencia y la Investigación
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869406439681818624
score 15.301603

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