Análise termogravimétrica da biomassa e seus compostos (celulose, hemicelulose e lignina)
Autor(a) principal: | |
---|---|
Data de Publicação: | 2022 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/16475 |
Resumo: | Lignocellulosic biomass is one of the renewable energies indicated in the replacement of fossil fuels for the production of bioenergy and mitigation of climate change, given its wide distribution and quantity, considering the different types of biomass and its residues. However, it is necessary to study the thermal behavior of biomass in order to achieve greater energy efficiency. A usual methodology to understand the thermal behavior of biomass is thermogravimetric analysis (TGA). As lignocellulosic biomass has a complex and heterogeneous composition, in TGA the decomposition ranges of its compounds overlap at some points. Thus, thermogravimetric analysis of biomass-cellulose, hemicellulose and lignin compounds has been used; in order to elucidate the degradation ranges and parameters of each constituent separately and how they interfere in the thermal degradation of in natura biomass. The objective of this work was to thermally analyze the biomass of eucalyptus wood chips and sugarcane bagasse, as well as their compounds – cellulose, hemicellulose and lignin; in order to understand more about the combustion and pyrolysis processes of biomass. Proximate analysis and chemical analysis of the biomasses were performed to obtain the components of the biomass and analyze in thermogravimetry. The materials analyzed were: microcrystalline cellulose, cotton, xylose, kraft and organosolv lignins, eucalyptus chips (in natura, without extractives, holocellulose, alphacellulose, lignin) and sugarcane bagasse (in natura, without extractives, holocellulose, alphacellulose, lignin). The xylose DTG curve showed two degradation peaks before 350 °C and stabilized the degradation near 400 °C, indicating less resistance to thermal degradation. The DTG curves for cotton, microcrystalline cellulose, alpha cellulose from eucalyptus chips and alpha cellulose from sugarcane bagasse showed a narrow degradation range and a sharp peak of maximum degradation around 300-400 °C. The DTG curves of lignins (kraft lignin, orgnosolv lignin, eucalyptus lignin and bagasse lignin) showed a less pronounced degradation, covering wide temperature ranges - between 270 and 560 °C, proving the stability and resistance of the material to thermal degradation. Sugarcane bagasse proved to be more thermally stable than eucalyptus. In general, for both eucalyptus and bagasse, the TG and DTG curves of in natura biomass, without extractives, holocellulose and alphacellulose were similar, but there was a gradual omission of the peak corresponding to the deflection temperature before the point of deflection. maximum decomposition (Tsh) and the narrowing of the base of the maximum degradation peak in the DTG curve, a behavior that is probably associated with the loss of secondary/extractive compounds and hemicellulose. To accurately plot the TG and DTG curves, as well as perform kinetic studies, it is recommended to use different heating rates. |
id |
SCAR_8a3e9bcd729e18481155ffe15105882b |
---|---|
oai_identifier_str |
oai:repositorio.ufscar.br:ufscar/16475 |
network_acronym_str |
SCAR |
network_name_str |
Repositório Institucional da UFSCAR |
repository_id_str |
4322 |
spelling |
Carvalho, Natália Rodrigues deYamaji, Fabio Minoruhttp://lattes.cnpq.br/4787449634914831Nakashima, Gabriela Tamihttp://lattes.cnpq.br/6568518277464223http://lattes.cnpq.br/431848984047609397c8011a-58bb-457a-b711-ab3ccd84117a2022-08-09T14:14:05Z2022-08-09T14:14:05Z2022-06-17CARVALHO, Natália Rodrigues de. Análise termogravimétrica da biomassa e seus compostos (celulose, hemicelulose e lignina). 22. Dissertação (Mestrado em Planejamento e Uso de Recursos Renováveis) – Universidade Federal de São Carlos, Sorocaba, 22. Disponível em: https://repositorio.ufscar.br/handle/ufscar/16475.https://repositorio.ufscar.br/handle/ufscar/16475Lignocellulosic biomass is one of the renewable energies indicated in the replacement of fossil fuels for the production of bioenergy and mitigation of climate change, given its wide distribution and quantity, considering the different types of biomass and its residues. However, it is necessary to study the thermal behavior of biomass in order to achieve greater energy efficiency. A usual methodology to understand the thermal behavior of biomass is thermogravimetric analysis (TGA). As lignocellulosic biomass has a complex and heterogeneous composition, in TGA the decomposition ranges of its compounds overlap at some points. Thus, thermogravimetric analysis of biomass-cellulose, hemicellulose and lignin compounds has been used; in order to elucidate the degradation ranges and parameters of each constituent separately and how they interfere in the thermal degradation of in natura biomass. The objective of this work was to thermally analyze the biomass of eucalyptus wood chips and sugarcane bagasse, as well as their compounds – cellulose, hemicellulose and lignin; in order to understand more about the combustion and pyrolysis processes of biomass. Proximate analysis and chemical analysis of the biomasses were performed to obtain the components of the biomass and analyze in thermogravimetry. The materials analyzed were: microcrystalline cellulose, cotton, xylose, kraft and organosolv lignins, eucalyptus chips (in natura, without extractives, holocellulose, alphacellulose, lignin) and sugarcane bagasse (in natura, without extractives, holocellulose, alphacellulose, lignin). The xylose DTG curve showed two degradation peaks before 350 °C and stabilized the degradation near 400 °C, indicating less resistance to thermal degradation. The DTG curves for cotton, microcrystalline cellulose, alpha cellulose from eucalyptus chips and alpha cellulose from sugarcane bagasse showed a narrow degradation range and a sharp peak of maximum degradation around 300-400 °C. The DTG curves of lignins (kraft lignin, orgnosolv lignin, eucalyptus lignin and bagasse lignin) showed a less pronounced degradation, covering wide temperature ranges - between 270 and 560 °C, proving the stability and resistance of the material to thermal degradation. Sugarcane bagasse proved to be more thermally stable than eucalyptus. In general, for both eucalyptus and bagasse, the TG and DTG curves of in natura biomass, without extractives, holocellulose and alphacellulose were similar, but there was a gradual omission of the peak corresponding to the deflection temperature before the point of deflection. maximum decomposition (Tsh) and the narrowing of the base of the maximum degradation peak in the DTG curve, a behavior that is probably associated with the loss of secondary/extractive compounds and hemicellulose. To accurately plot the TG and DTG curves, as well as perform kinetic studies, it is recommended to use different heating rates.A biomassa lignocelulósica é uma das energias renováveis indicada na substituição dos combustíveis fósseis para a produção de bioenergia e mitigação das mudanças climáticas, visto sua ampla distribuição e quantidade, considerando-se os diversos tipos de biomassa e seus resíduos. No entanto, é necessário estudar o comportamento térmico da biomassa para que se adquira maior eficiência energética. Uma metodologia usual para compreender o comportamento térmico da biomassa é a análise termogravimétrica (TGA). Como a biomassa lignocelulósica possui composição complexa e heterogênea, na TGA as faixas de decomposição de seus compostos se sobrepõem em alguns pontos. Desse modo, têm sido utilizada a análise termogravimétrica dos compostos da biomassa- celulose, hemicelulose e lignina; a fim de elucidar as faixas de degradação e os parâmetros de cada constituinte isoladamente e como eles interferem na degradação térmica da biomassa in natura. O objetivo do trabalho foi analisar termicamente as biomassas cavaco de eucalipto e bagaço de cana-de-açúcar, bem como seus compostos – celulose, hemicelulose e lignina; a fim de compreender mais acerca dos processos de combustão e pirólise das biomassas. Foi realizada análise imediata e análise química das biomassas para obter os componentes da biomassa e analisar em termogravimetria. Os materiais analisados foram: celulose microcristalina, algodão, xilose, ligninas kraft e organosolv, cavaco de eucalipto (in natura, sem extrativos, holocelulose, alfacelulose, lignina) e bagaço de cana-de-açúcar (in natura, sem extrativos, holocelulose, alfacelulose, lignina). A curva DTG da xilose apresentou dois picos de degradação antes de 350 °C e estabilizou a degradação próximo a 400 °C, indicando menor resistência a degradação térmica. As curvas DTG do algodão, celulose microcristalina, alfacelulose de cavaco de eucalipto e alfacelulose de bagaço de cana-de-açúcar apresentaram faixa de degradação estreita e pico de degradação máxima acentuado entorno de 300-400 °C. As curvas DTG das ligninas (lignina kraft, lignina orgnosolv, lignina do eucalipto e lignina do bagaço) registraram uma degradação menos acentuada, abrangendo amplas faixas de temperatura- entre 270 e 560 °C, comprovando a estabilidade e resistência do material a degradação térmica. O bagaço de cana-de-açúcar demonstrou ser mais estável termicamente que o eucalipto. De maneira geral, tanto para o eucalipto como para o bagaço, as curvas TG e DTG da biomassa in natura, sem extrativos, holocelulose e alfacelulose foram semelhantes, mas observa-se a omissão gradativa do pico correspondente a temperatura de deflexão antes do ponto de decomposição máxima (Tsh) e o estreitamento da base do pico de degradação máxima na curva DTG, comportamento este que provavelmente está associado a perda de compostos secundários/extrativos e da hemicelulose. Para traçar precisamente as curvas TG e DTG, bem como realizar estudos cinéticos, recomenda-se o uso de diferentes taxas de aquecimento.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)porUniversidade Federal de São CarlosCâmpus SorocabaPrograma de Pós-Graduação em Planejamento e Uso de Recursos Renováveis - PPGPUR-SoUFSCarAttribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessTermogravimetriaBioenergiaDegradação térmicaThermogravimetryBioenergyThermal degradationCIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTALAnálise termogravimétrica da biomassa e seus compostos (celulose, hemicelulose e lignina)Thermogravimetric analysis of biomass and compounds (cellulose, hemicellulose and lignin)info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis600600c2194a66-c652-4085-8d61-a94327601c24reponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALdissertação_natalia.pdfdissertação_natalia.pdfapplication/pdf2186669https://repositorio.ufscar.br/bitstream/ufscar/16475/1/disserta%c3%a7%c3%a3o_natalia.pdf80708af839b9f9a3c75f9835adb3632cMD51form_final_assinado.pdfform_final_assinado.pdfapplication/pdf149459https://repositorio.ufscar.br/bitstream/ufscar/16475/3/form_final_assinado.pdf29067217e756c7b9d2635f8f58965cbeMD53CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8811https://repositorio.ufscar.br/bitstream/ufscar/16475/4/license_rdfe39d27027a6cc9cb039ad269a5db8e34MD54TEXTdissertação_natalia.pdf.txtdissertação_natalia.pdf.txtExtracted texttext/plain109872https://repositorio.ufscar.br/bitstream/ufscar/16475/5/disserta%c3%a7%c3%a3o_natalia.pdf.txtfd7b412cc6c3b05968ffe5f396cea496MD55form_final_assinado.pdf.txtform_final_assinado.pdf.txtExtracted texttext/plain1335https://repositorio.ufscar.br/bitstream/ufscar/16475/7/form_final_assinado.pdf.txt9cbde04900725b7e4d4132a601feee90MD57THUMBNAILdissertação_natalia.pdf.jpgdissertação_natalia.pdf.jpgIM Thumbnailimage/jpeg6259https://repositorio.ufscar.br/bitstream/ufscar/16475/6/disserta%c3%a7%c3%a3o_natalia.pdf.jpg9af8b8ac7e5261607e3412c311d9b451MD56form_final_assinado.pdf.jpgform_final_assinado.pdf.jpgIM Thumbnailimage/jpeg6327https://repositorio.ufscar.br/bitstream/ufscar/16475/8/form_final_assinado.pdf.jpgc7e0def9a91b117120871b37640cc9ccMD58ufscar/164752023-09-18 18:32:26.575oai:repositorio.ufscar.br:ufscar/16475Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:32:26Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Análise termogravimétrica da biomassa e seus compostos (celulose, hemicelulose e lignina) |
dc.title.alternative.eng.fl_str_mv |
Thermogravimetric analysis of biomass and compounds (cellulose, hemicellulose and lignin) |
title |
Análise termogravimétrica da biomassa e seus compostos (celulose, hemicelulose e lignina) |
spellingShingle |
Análise termogravimétrica da biomassa e seus compostos (celulose, hemicelulose e lignina) Carvalho, Natália Rodrigues de Termogravimetria Bioenergia Degradação térmica Thermogravimetry Bioenergy Thermal degradation CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL |
title_short |
Análise termogravimétrica da biomassa e seus compostos (celulose, hemicelulose e lignina) |
title_full |
Análise termogravimétrica da biomassa e seus compostos (celulose, hemicelulose e lignina) |
title_fullStr |
Análise termogravimétrica da biomassa e seus compostos (celulose, hemicelulose e lignina) |
title_full_unstemmed |
Análise termogravimétrica da biomassa e seus compostos (celulose, hemicelulose e lignina) |
title_sort |
Análise termogravimétrica da biomassa e seus compostos (celulose, hemicelulose e lignina) |
author |
Carvalho, Natália Rodrigues de |
author_facet |
Carvalho, Natália Rodrigues de |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/4318489840476093 |
dc.contributor.author.fl_str_mv |
Carvalho, Natália Rodrigues de |
dc.contributor.advisor1.fl_str_mv |
Yamaji, Fabio Minoru |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/4787449634914831 |
dc.contributor.advisor-co1.fl_str_mv |
Nakashima, Gabriela Tami |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/6568518277464223 |
dc.contributor.authorID.fl_str_mv |
97c8011a-58bb-457a-b711-ab3ccd84117a |
contributor_str_mv |
Yamaji, Fabio Minoru Nakashima, Gabriela Tami |
dc.subject.por.fl_str_mv |
Termogravimetria Bioenergia Degradação térmica |
topic |
Termogravimetria Bioenergia Degradação térmica Thermogravimetry Bioenergy Thermal degradation CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL |
dc.subject.eng.fl_str_mv |
Thermogravimetry Bioenergy Thermal degradation |
dc.subject.cnpq.fl_str_mv |
CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL |
description |
Lignocellulosic biomass is one of the renewable energies indicated in the replacement of fossil fuels for the production of bioenergy and mitigation of climate change, given its wide distribution and quantity, considering the different types of biomass and its residues. However, it is necessary to study the thermal behavior of biomass in order to achieve greater energy efficiency. A usual methodology to understand the thermal behavior of biomass is thermogravimetric analysis (TGA). As lignocellulosic biomass has a complex and heterogeneous composition, in TGA the decomposition ranges of its compounds overlap at some points. Thus, thermogravimetric analysis of biomass-cellulose, hemicellulose and lignin compounds has been used; in order to elucidate the degradation ranges and parameters of each constituent separately and how they interfere in the thermal degradation of in natura biomass. The objective of this work was to thermally analyze the biomass of eucalyptus wood chips and sugarcane bagasse, as well as their compounds – cellulose, hemicellulose and lignin; in order to understand more about the combustion and pyrolysis processes of biomass. Proximate analysis and chemical analysis of the biomasses were performed to obtain the components of the biomass and analyze in thermogravimetry. The materials analyzed were: microcrystalline cellulose, cotton, xylose, kraft and organosolv lignins, eucalyptus chips (in natura, without extractives, holocellulose, alphacellulose, lignin) and sugarcane bagasse (in natura, without extractives, holocellulose, alphacellulose, lignin). The xylose DTG curve showed two degradation peaks before 350 °C and stabilized the degradation near 400 °C, indicating less resistance to thermal degradation. The DTG curves for cotton, microcrystalline cellulose, alpha cellulose from eucalyptus chips and alpha cellulose from sugarcane bagasse showed a narrow degradation range and a sharp peak of maximum degradation around 300-400 °C. The DTG curves of lignins (kraft lignin, orgnosolv lignin, eucalyptus lignin and bagasse lignin) showed a less pronounced degradation, covering wide temperature ranges - between 270 and 560 °C, proving the stability and resistance of the material to thermal degradation. Sugarcane bagasse proved to be more thermally stable than eucalyptus. In general, for both eucalyptus and bagasse, the TG and DTG curves of in natura biomass, without extractives, holocellulose and alphacellulose were similar, but there was a gradual omission of the peak corresponding to the deflection temperature before the point of deflection. maximum decomposition (Tsh) and the narrowing of the base of the maximum degradation peak in the DTG curve, a behavior that is probably associated with the loss of secondary/extractive compounds and hemicellulose. To accurately plot the TG and DTG curves, as well as perform kinetic studies, it is recommended to use different heating rates. |
publishDate |
2022 |
dc.date.accessioned.fl_str_mv |
2022-08-09T14:14:05Z |
dc.date.available.fl_str_mv |
2022-08-09T14:14:05Z |
dc.date.issued.fl_str_mv |
2022-06-17 |
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 |
CARVALHO, Natália Rodrigues de. Análise termogravimétrica da biomassa e seus compostos (celulose, hemicelulose e lignina). 22. Dissertação (Mestrado em Planejamento e Uso de Recursos Renováveis) – Universidade Federal de São Carlos, Sorocaba, 22. Disponível em: https://repositorio.ufscar.br/handle/ufscar/16475. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/16475 |
identifier_str_mv |
CARVALHO, Natália Rodrigues de. Análise termogravimétrica da biomassa e seus compostos (celulose, hemicelulose e lignina). 22. Dissertação (Mestrado em Planejamento e Uso de Recursos Renováveis) – Universidade Federal de São Carlos, Sorocaba, 22. Disponível em: https://repositorio.ufscar.br/handle/ufscar/16475. |
url |
https://repositorio.ufscar.br/handle/ufscar/16475 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.confidence.fl_str_mv |
600 600 |
dc.relation.authority.fl_str_mv |
c2194a66-c652-4085-8d61-a94327601c24 |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de São Carlos Câmpus Sorocaba |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Planejamento e Uso de Recursos Renováveis - PPGPUR-So |
dc.publisher.initials.fl_str_mv |
UFSCar |
publisher.none.fl_str_mv |
Universidade Federal de São Carlos Câmpus Sorocaba |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFSCAR instname:Universidade Federal de São Carlos (UFSCAR) instacron:UFSCAR |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
UFSCAR |
institution |
UFSCAR |
reponame_str |
Repositório Institucional da UFSCAR |
collection |
Repositório Institucional da UFSCAR |
bitstream.url.fl_str_mv |
https://repositorio.ufscar.br/bitstream/ufscar/16475/1/disserta%c3%a7%c3%a3o_natalia.pdf https://repositorio.ufscar.br/bitstream/ufscar/16475/3/form_final_assinado.pdf https://repositorio.ufscar.br/bitstream/ufscar/16475/4/license_rdf https://repositorio.ufscar.br/bitstream/ufscar/16475/5/disserta%c3%a7%c3%a3o_natalia.pdf.txt https://repositorio.ufscar.br/bitstream/ufscar/16475/7/form_final_assinado.pdf.txt https://repositorio.ufscar.br/bitstream/ufscar/16475/6/disserta%c3%a7%c3%a3o_natalia.pdf.jpg https://repositorio.ufscar.br/bitstream/ufscar/16475/8/form_final_assinado.pdf.jpg |
bitstream.checksum.fl_str_mv |
80708af839b9f9a3c75f9835adb3632c 29067217e756c7b9d2635f8f58965cbe e39d27027a6cc9cb039ad269a5db8e34 fd7b412cc6c3b05968ffe5f396cea496 9cbde04900725b7e4d4132a601feee90 9af8b8ac7e5261607e3412c311d9b451 c7e0def9a91b117120871b37640cc9cc |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 MD5 MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
|
_version_ |
1802136409813811200 |