Pirólise térmica e catalítica de policloreto de vinila pós consumo utilizando catalisadores micro/mesoporosos do tipo ZSM-35/MCM41
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFS |
Texto Completo: | https://ri.ufs.br/jspui/handle/riufs/17799 |
Resumo: | Polyvinyl chloride (PVC), has been widely used for various purposes due to its low price and good durability, this being one of the most important and comercialized materials currently. However, incorrect its disposal contributes to high waste generation. In the perspective of energy recovery and reciclyng, the pyrolysis of PVC waste has proved to be one of the most promising methods of recycling and energy recovery. The present work studied a thermal pyrolysis of post-consumer PVC as well as its catalytic pyrolysis using micro/mesoporous catalysts type ZSM-35/MCM-41. The MCM-41 was synthesized by the hydrothermal method, the HZSM-35 acid zeolite was obtained by ion exchange and the micro/mesoporous catalysts ZSM-35/MCM-41 were developed by the mechanical method in the following mass proportions: 25/75, 50/50 and 75/25. The samples were characterized by X-ray diffraction (XRD), adsorption/desorption of N2 at 77 K. The pyrolysis tests were performed in a thermobalance in the temperature range of 30 to 900 °C and using heating rates of 5, 10 and 20 °C min-1 . The ZSM-35/MCM-41 X-ray diffractograms showed the characteristic peaks of MCM-41 and ZSM-35 zeolite with good crystallinity. The adsorption of N2 at 77 K showed that the MCM-41 presents type IV isotherm and the ZSM-35 zeolite presents type I isotherm and the ZSM-35/MCM-41 materials presented isotherms with type I and IV characteristics. The total area of the ZSM-35/MCM-41 catalysts decreased as the MCM-41 ratio decreased in the catalyst. The thermal pyrolysis results showed that PVC decomposes into two main events, between 200 and 400 °C, and between 400 and 600 °C. The catalytic decomposition of PVC occurred in two stages, and the parameters heating rate and catalyst composition influence the pyrolysis process. Under the studied conditions, the ZSM-35/MCM-41 catalysts promoted a decrease in the average temperatures of the PVC decomposition events and showed satisfactory conversion values. |
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Silva, Thereza Helena AzevedoSouza, Marcelo José Barros deSouza, Anne Michelle Garrido Pedrosa de2023-07-06T20:42:53Z2023-07-06T20:42:53Z2019-02-25SILVA, Thereza Helena Azevedo. Pirólise térmica e catalítica de policloreto de vinila pós consumo utilizando catalisadores micro/mesoporosos do tipo ZSM-35/MCM41. 2019. 100 f. Dissertação (Mestrado em Engenharia Química) – Universidade Federal de Sergipe, São Cristóvão, 2019.https://ri.ufs.br/jspui/handle/riufs/17799Polyvinyl chloride (PVC), has been widely used for various purposes due to its low price and good durability, this being one of the most important and comercialized materials currently. However, incorrect its disposal contributes to high waste generation. In the perspective of energy recovery and reciclyng, the pyrolysis of PVC waste has proved to be one of the most promising methods of recycling and energy recovery. The present work studied a thermal pyrolysis of post-consumer PVC as well as its catalytic pyrolysis using micro/mesoporous catalysts type ZSM-35/MCM-41. The MCM-41 was synthesized by the hydrothermal method, the HZSM-35 acid zeolite was obtained by ion exchange and the micro/mesoporous catalysts ZSM-35/MCM-41 were developed by the mechanical method in the following mass proportions: 25/75, 50/50 and 75/25. The samples were characterized by X-ray diffraction (XRD), adsorption/desorption of N2 at 77 K. The pyrolysis tests were performed in a thermobalance in the temperature range of 30 to 900 °C and using heating rates of 5, 10 and 20 °C min-1 . The ZSM-35/MCM-41 X-ray diffractograms showed the characteristic peaks of MCM-41 and ZSM-35 zeolite with good crystallinity. The adsorption of N2 at 77 K showed that the MCM-41 presents type IV isotherm and the ZSM-35 zeolite presents type I isotherm and the ZSM-35/MCM-41 materials presented isotherms with type I and IV characteristics. The total area of the ZSM-35/MCM-41 catalysts decreased as the MCM-41 ratio decreased in the catalyst. The thermal pyrolysis results showed that PVC decomposes into two main events, between 200 and 400 °C, and between 400 and 600 °C. The catalytic decomposition of PVC occurred in two stages, and the parameters heating rate and catalyst composition influence the pyrolysis process. Under the studied conditions, the ZSM-35/MCM-41 catalysts promoted a decrease in the average temperatures of the PVC decomposition events and showed satisfactory conversion values.O policloreto de vinila (PVC), tem sido amplamente utilizado para diversas finalidades devido ao seu baixo preço e boa durabilidade, sendo este um dos materiais sintéticos mais importantes e comercializados atualmente. Entretanto, seu descarte de forma incorreta contribui para uma alta geração de resíduos. Na perspectiva de valorização energética e reciclagem desses resíduos, a pirólise de resíduos de PVC tem se mostrado um dos métodos mais promissores de reciclagem e valorização energética. O presente trabalho estudou a pirólise térmica do PVC pós-consumo bem como sua pirólise catalítica utilizando catalisadores micro/mesoporosos do tipo ZSM-35/MCM-41. O MCM-41 foi sintetizado pelo método hidrotérmico, a zeólita ácida HZSM-35 foi obtida através de troca iônica a partir de um material comercial e os catalisadores micro/mesoporosos do tipo ZSM-35/MCM-41 foram desenvolvidos pelo método da mecanissíntese nas proporções mássicas de 25/75, 50/50 e 75/25. As amostras foram caracterizadas por difratometria de raios X (DRX) e adsorção/dessorção de N2 a 77 K. Os testes de pirólise foram realizados em uma termobalança na faixa de temperatura de 30 a 900 °C e utilizando as taxas de aquecimento de 5, 10 e 20 °C min-1 . Os difratogramas de raios X do ZSM35/MCM-41 mostraram os picos carcateristicos do MCM-41 e da zeólita ZSM-35 com boa cristalinidade. Os resultados da adsorção de N2 a 77 K mostraram que o MCM-41 apresenta isoterma tipo IV e a zeólita ZSM-35 apresenta isoterma tipo I e os materiais ZSM-35/MCM-41 apresentaram isotermas com características do tipo I e IV. A área total dos catalisadores ZSM35/MCM-41 diminuiu à medida que a proporção MCM-41 diminui no catalisador. Os resultados da pirólise térmica mostraram que o PVC se decompõe em dois eventos principais, entre 200 e 400 °C, e entre 400 e 600 °C. A decomposição catalítica do PVC ocorreu em dois estágios, e os parâmetros taxa de aquecimento e composição do catalisador influenciam no processo de pirólise. Nas condições estudadas, os catalisadores ZSM-35/MCM-41 promoveram diminuição nas temperaturas médias dos eventos de decomposição do PVC e apresentaram valores de conversão satisfatórios.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESSão CristóvãoporEngenharia químicaPirólisePVC (cloreto de polivinila)CatalisadoresPVCCatalisadores micro/mesoporososPyrolsisMicro/mesoporous catalystsENGENHARIAS::ENGENHARIA QUIMICAPirólise térmica e catalítica de policloreto de vinila pós consumo utilizando catalisadores micro/mesoporosos do tipo ZSM-35/MCM41info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisPós-Graduação em Engenharia QuímicaUniversidade Federal de Sergipe (UFS)reponame:Repositório Institucional da UFSinstname:Universidade Federal de Sergipe (UFS)instacron:UFSinfo:eu-repo/semantics/openAccessLICENSElicense.txtlicense.txttext/plain; charset=utf-81475https://ri.ufs.br/jspui/bitstream/riufs/17799/1/license.txt098cbbf65c2c15e1fb2e49c5d306a44cMD51ORIGINALTHEREZA_HELENA_AZEVEDO_SILVA.pdfTHEREZA_HELENA_AZEVEDO_SILVA.pdfapplication/pdf2314034https://ri.ufs.br/jspui/bitstream/riufs/17799/2/THEREZA_HELENA_AZEVEDO_SILVA.pdf08627c52a01fbac479e33ea72842645cMD52TEXTTHEREZA_HELENA_AZEVEDO_SILVA.pdf.txtTHEREZA_HELENA_AZEVEDO_SILVA.pdf.txtExtracted texttext/plain157436https://ri.ufs.br/jspui/bitstream/riufs/17799/3/THEREZA_HELENA_AZEVEDO_SILVA.pdf.txtc8e8232276387639c7a2bf196ab56f49MD53THUMBNAILTHEREZA_HELENA_AZEVEDO_SILVA.pdf.jpgTHEREZA_HELENA_AZEVEDO_SILVA.pdf.jpgGenerated Thumbnailimage/jpeg1349https://ri.ufs.br/jspui/bitstream/riufs/17799/4/THEREZA_HELENA_AZEVEDO_SILVA.pdf.jpge86e092098033564a56c5c0f19985c08MD54riufs/177992023-07-06 17:42:58.594oai:ufs.br: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Repositório InstitucionalPUBhttps://ri.ufs.br/oai/requestrepositorio@academico.ufs.bropendoar:2023-07-06T20:42:58Repositório Institucional da UFS - Universidade Federal de Sergipe (UFS)false |
dc.title.pt_BR.fl_str_mv |
Pirólise térmica e catalítica de policloreto de vinila pós consumo utilizando catalisadores micro/mesoporosos do tipo ZSM-35/MCM41 |
title |
Pirólise térmica e catalítica de policloreto de vinila pós consumo utilizando catalisadores micro/mesoporosos do tipo ZSM-35/MCM41 |
spellingShingle |
Pirólise térmica e catalítica de policloreto de vinila pós consumo utilizando catalisadores micro/mesoporosos do tipo ZSM-35/MCM41 Silva, Thereza Helena Azevedo Engenharia química Pirólise PVC (cloreto de polivinila) Catalisadores PVC Catalisadores micro/mesoporosos Pyrolsis Micro/mesoporous catalysts ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Pirólise térmica e catalítica de policloreto de vinila pós consumo utilizando catalisadores micro/mesoporosos do tipo ZSM-35/MCM41 |
title_full |
Pirólise térmica e catalítica de policloreto de vinila pós consumo utilizando catalisadores micro/mesoporosos do tipo ZSM-35/MCM41 |
title_fullStr |
Pirólise térmica e catalítica de policloreto de vinila pós consumo utilizando catalisadores micro/mesoporosos do tipo ZSM-35/MCM41 |
title_full_unstemmed |
Pirólise térmica e catalítica de policloreto de vinila pós consumo utilizando catalisadores micro/mesoporosos do tipo ZSM-35/MCM41 |
title_sort |
Pirólise térmica e catalítica de policloreto de vinila pós consumo utilizando catalisadores micro/mesoporosos do tipo ZSM-35/MCM41 |
author |
Silva, Thereza Helena Azevedo |
author_facet |
Silva, Thereza Helena Azevedo |
author_role |
author |
dc.contributor.author.fl_str_mv |
Silva, Thereza Helena Azevedo |
dc.contributor.advisor1.fl_str_mv |
Souza, Marcelo José Barros de |
dc.contributor.advisor-co1.fl_str_mv |
Souza, Anne Michelle Garrido Pedrosa de |
contributor_str_mv |
Souza, Marcelo José Barros de Souza, Anne Michelle Garrido Pedrosa de |
dc.subject.por.fl_str_mv |
Engenharia química Pirólise PVC (cloreto de polivinila) Catalisadores PVC Catalisadores micro/mesoporosos |
topic |
Engenharia química Pirólise PVC (cloreto de polivinila) Catalisadores PVC Catalisadores micro/mesoporosos Pyrolsis Micro/mesoporous catalysts ENGENHARIAS::ENGENHARIA QUIMICA |
dc.subject.eng.fl_str_mv |
Pyrolsis Micro/mesoporous catalysts |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA QUIMICA |
description |
Polyvinyl chloride (PVC), has been widely used for various purposes due to its low price and good durability, this being one of the most important and comercialized materials currently. However, incorrect its disposal contributes to high waste generation. In the perspective of energy recovery and reciclyng, the pyrolysis of PVC waste has proved to be one of the most promising methods of recycling and energy recovery. The present work studied a thermal pyrolysis of post-consumer PVC as well as its catalytic pyrolysis using micro/mesoporous catalysts type ZSM-35/MCM-41. The MCM-41 was synthesized by the hydrothermal method, the HZSM-35 acid zeolite was obtained by ion exchange and the micro/mesoporous catalysts ZSM-35/MCM-41 were developed by the mechanical method in the following mass proportions: 25/75, 50/50 and 75/25. The samples were characterized by X-ray diffraction (XRD), adsorption/desorption of N2 at 77 K. The pyrolysis tests were performed in a thermobalance in the temperature range of 30 to 900 °C and using heating rates of 5, 10 and 20 °C min-1 . The ZSM-35/MCM-41 X-ray diffractograms showed the characteristic peaks of MCM-41 and ZSM-35 zeolite with good crystallinity. The adsorption of N2 at 77 K showed that the MCM-41 presents type IV isotherm and the ZSM-35 zeolite presents type I isotherm and the ZSM-35/MCM-41 materials presented isotherms with type I and IV characteristics. The total area of the ZSM-35/MCM-41 catalysts decreased as the MCM-41 ratio decreased in the catalyst. The thermal pyrolysis results showed that PVC decomposes into two main events, between 200 and 400 °C, and between 400 and 600 °C. The catalytic decomposition of PVC occurred in two stages, and the parameters heating rate and catalyst composition influence the pyrolysis process. Under the studied conditions, the ZSM-35/MCM-41 catalysts promoted a decrease in the average temperatures of the PVC decomposition events and showed satisfactory conversion values. |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019-02-25 |
dc.date.accessioned.fl_str_mv |
2023-07-06T20:42:53Z |
dc.date.available.fl_str_mv |
2023-07-06T20:42:53Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
SILVA, Thereza Helena Azevedo. Pirólise térmica e catalítica de policloreto de vinila pós consumo utilizando catalisadores micro/mesoporosos do tipo ZSM-35/MCM41. 2019. 100 f. Dissertação (Mestrado em Engenharia Química) – Universidade Federal de Sergipe, São Cristóvão, 2019. |
dc.identifier.uri.fl_str_mv |
https://ri.ufs.br/jspui/handle/riufs/17799 |
identifier_str_mv |
SILVA, Thereza Helena Azevedo. Pirólise térmica e catalítica de policloreto de vinila pós consumo utilizando catalisadores micro/mesoporosos do tipo ZSM-35/MCM41. 2019. 100 f. Dissertação (Mestrado em Engenharia Química) – Universidade Federal de Sergipe, São Cristóvão, 2019. |
url |
https://ri.ufs.br/jspui/handle/riufs/17799 |
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Pós-Graduação em Engenharia Química |
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Universidade Federal de Sergipe (UFS) |
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