Sustainable polymer solutions through biomass liquefaction processes

Detalhes bibliográficos
Autor(a) principal: Bourogaa, Intissar
Data de Publicação: 2018
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10198/19677
Resumo: Dupla diplomação com a Université Libre de Tunis
id RCAP_2413491c99840ea317dc6cc7f848a493
oai_identifier_str oai:bibliotecadigital.ipb.pt:10198/19677
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Sustainable polymer solutions through biomass liquefaction processesLigninLiquefactionMicrowaveConventional reactorBiopolyolsDomínio/Área Científica::Ciências Naturais::Ciências QuímicasDupla diplomação com a Université Libre de TunisIn a context of better management of land resources and development of renewable biomass-based chemicals, lignin offers excellent alternative to replace certain fossil-based derivatives. Through the integration of green chemistry into biorefineries, and the use of low environmental impact technologies, we can establish future supply chains for genuinely green and sustainable chemical products. Indeed, lignin can be converted into polyols via several processes, mainly liquefaction. Liquefaction is considered an efficient method to generate polyols with high content of reactive hydroxyl groups. These final products can be used as raw materials for polymer synthesis, like in the production of polyurethanes and polyesters. In our study this alternative has been adopted; namely by using conventional heating system and microwave heating. The difference between the two is essentially based on energetic terms, given that liquefaction processes are usually carried out at high temperatures, using different types of liquefaction solvents and in the presence of acid catalysts. The use of microwave heating system has various advantages in terms of speed and consumed energy. The objective of this study was to compare the liquefaction of sodium lignosulphonate lignin by conventional heating system and microwave system. The liquefaction was carried out using polyethylene glycol (Mw 400) and glycerol as solvents, and sulphuric acid as catalyst, and the conversion yield determined, aiming at achieve the best liquefaction conditions. In fact, several process conditions were tested namely the catalyst content (1, 2 and 3%, (w/w, solvent-basis) and liquefaction temperature (140, 160 and 180°C). The obtained polyols were characterized in terms of their most relevant technical properties: hydroxyl number (IOH), viscosity, and unreacted biomass. The chemical structure, which was evaluated by Fourier Transform Infrared analysis (FTIR) was also checked. Finally, the properties of the generated polyols were compared in order to evaluate the efficiency of both systems.Barreiro, M.F.Fernandes, Isabel PatríciaEl Aissi, RadhiaBiblioteca Digital do IPBBourogaa, Intissar2019-10-16T15:49:16Z201920182019-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10198/19677TID:202289591enginfo: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:RCAAP2023-11-21T10:44:51Zoai:bibliotecadigital.ipb.pt:10198/19677Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T23:10:16.467987Repositório 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 Sustainable polymer solutions through biomass liquefaction processes
title Sustainable polymer solutions through biomass liquefaction processes
spellingShingle Sustainable polymer solutions through biomass liquefaction processes
Bourogaa, Intissar
Lignin
Liquefaction
Microwave
Conventional reactor
Biopolyols
Domínio/Área Científica::Ciências Naturais::Ciências Químicas
title_short Sustainable polymer solutions through biomass liquefaction processes
title_full Sustainable polymer solutions through biomass liquefaction processes
title_fullStr Sustainable polymer solutions through biomass liquefaction processes
title_full_unstemmed Sustainable polymer solutions through biomass liquefaction processes
title_sort Sustainable polymer solutions through biomass liquefaction processes
author Bourogaa, Intissar
author_facet Bourogaa, Intissar
author_role author
dc.contributor.none.fl_str_mv Barreiro, M.F.
Fernandes, Isabel Patrícia
El Aissi, Radhia
Biblioteca Digital do IPB
dc.contributor.author.fl_str_mv Bourogaa, Intissar
dc.subject.por.fl_str_mv Lignin
Liquefaction
Microwave
Conventional reactor
Biopolyols
Domínio/Área Científica::Ciências Naturais::Ciências Químicas
topic Lignin
Liquefaction
Microwave
Conventional reactor
Biopolyols
Domínio/Área Científica::Ciências Naturais::Ciências Químicas
description Dupla diplomação com a Université Libre de Tunis
publishDate 2018
dc.date.none.fl_str_mv 2018
2019-10-16T15:49:16Z
2019
2019-01-01T00:00:00Z
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.uri.fl_str_mv http://hdl.handle.net/10198/19677
TID:202289591
url http://hdl.handle.net/10198/19677
identifier_str_mv TID:202289591
dc.language.iso.fl_str_mv eng
language eng
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.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
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv 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
_version_ 1799135368565489665

Registros relacionados