Avaliação do processo sequencial de hidrólise e liquefação hidrotérmica do sabugo de milho
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/27541 |
Resumo: | The growing energy demand and limitations in the use of fossil fuels encourage the research of different renewable energy sources, such as agro-industrial residues. The corn crop in Brazil corresponds to 40% of the national grain production, generating significant amounts of waste such as leaves, straw, stalks, and cobs, potential sources of selected chemical products and energy that became the focus of different studies for their valorization. Therefore, sequential hydrolysis and hydrothermal liquefaction (HTL) of corn cob were investigated, in which hydrolysate samples were collected during the hydrolysis step prior to HTL. The biomass was characterized by physicochemical methods, elemental analysis and by Fourier Transform Infrared Spectrophotometry (FT-IR). An experimental unit in semi-continuous regime was developed to research the optimal parameters for bio-oil production at 15 MPa. The influence of hydrolysis temperature (230 and 260°C), and volumetric flow rate (5 and 10 mL.min-1) on the yields and kinetic profiles (0-15 min) of hydrolysates were evaluated using High Performance Liquid Chromatography (HPLC). The influence of HTL temperature (300 and 350 °C) and volumetric flow rate (5 and 10 mL.min-1) on the yields and chemical profiles of the solid product (hydro-char) was evaluated by elemental analysis and FT-IR, and of the liquid product (bio-oil), by Gas Chromatography coupled to Mass Spectrometry (GC-MS) to analyze the composition and chemical profile of the products generated between the two routes. The highest concentrations of sugars (7.49 ± 1.97 g.L-1) and organic acids (9.35 ± 3.46 g.L-1) were observed at 260 °C and 5 mL.min-1 conditions, while that of inhibitors (7.64 ± 1.87 g.L-1) were observed at 230 °C and 5 mL.min-1 conditions. Sampling hydrolysates in the sequential process resulted in lower overall yield compared to HTL. The elemental composition of the hydro-char produced by the sequential process and the HTL were similar, as well as the higher heating value (26.06 and 26.15 MJ.kg-1, respectively); a higher concentration of oxygenated organic groups was observed in the hydro-char from the sequential process. The bio-oil produced by the sequential process exhibited a higher concentration of nitrogenous and oxygenated compounds than that produced in the HTL. |
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Avaliação do processo sequencial de hidrólise e liquefação hidrotérmica do sabugo de milhoSugars and bio-oil production by sequential hydrothermal processing of corn cobBiomassaLiquefação hidrotérmicaHidróliseBio-óleoHidro-charBiomassHydrothermal liquefactionSWEBio-oilHydrocharCNPQ::ENGENHARIAS::ENGENHARIA QUIMICAThe growing energy demand and limitations in the use of fossil fuels encourage the research of different renewable energy sources, such as agro-industrial residues. The corn crop in Brazil corresponds to 40% of the national grain production, generating significant amounts of waste such as leaves, straw, stalks, and cobs, potential sources of selected chemical products and energy that became the focus of different studies for their valorization. Therefore, sequential hydrolysis and hydrothermal liquefaction (HTL) of corn cob were investigated, in which hydrolysate samples were collected during the hydrolysis step prior to HTL. The biomass was characterized by physicochemical methods, elemental analysis and by Fourier Transform Infrared Spectrophotometry (FT-IR). An experimental unit in semi-continuous regime was developed to research the optimal parameters for bio-oil production at 15 MPa. The influence of hydrolysis temperature (230 and 260°C), and volumetric flow rate (5 and 10 mL.min-1) on the yields and kinetic profiles (0-15 min) of hydrolysates were evaluated using High Performance Liquid Chromatography (HPLC). The influence of HTL temperature (300 and 350 °C) and volumetric flow rate (5 and 10 mL.min-1) on the yields and chemical profiles of the solid product (hydro-char) was evaluated by elemental analysis and FT-IR, and of the liquid product (bio-oil), by Gas Chromatography coupled to Mass Spectrometry (GC-MS) to analyze the composition and chemical profile of the products generated between the two routes. The highest concentrations of sugars (7.49 ± 1.97 g.L-1) and organic acids (9.35 ± 3.46 g.L-1) were observed at 260 °C and 5 mL.min-1 conditions, while that of inhibitors (7.64 ± 1.87 g.L-1) were observed at 230 °C and 5 mL.min-1 conditions. Sampling hydrolysates in the sequential process resulted in lower overall yield compared to HTL. The elemental composition of the hydro-char produced by the sequential process and the HTL were similar, as well as the higher heating value (26.06 and 26.15 MJ.kg-1, respectively); a higher concentration of oxygenated organic groups was observed in the hydro-char from the sequential process. The bio-oil produced by the sequential process exhibited a higher concentration of nitrogenous and oxygenated compounds than that produced in the HTL.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESA crescente demanda energética e as limitações no uso de combustíveis fósseis incentivam a pesquisa de diferentes fontes renováveis de energia, como os resíduos agroindustriais. A cultura de milho no Brasil corresponde a 40% da produção de grãos nacional, gerando quantidades significativas de resíduos como folha, palha, colmo e sabugo, potenciais fontes de produtos químicos de interesse e de energia que se tornaram focos de diferentes estudos para sua valorização. Portanto, avaliou-se o processo sequencial de hidrólise e liquefação hidrotérmica (HTL) do sabugo de milho, no qual amostras de hidrolisados foram coletadas durante a etapa de hidrólise antes da HTL. A biomassa foi caracterizada por métodos físico-químicos, análise elementar e pela Espectrofotometria no Infravermelho por Transformada de Fourier (FT-IR). Uma unidade experimental em regime semi-contínuo foi desenvolvida para otimizar as variáveis para a produção de bio-óleo em 15 MPa. A influência da temperatura de hidrólise (230 e 260°C), e vazão volumétrica (5 e 10 mL.min-1) nos rendimentos e perfis cinéticos (0-15 min) de hidrolisados foi avaliada através da Cromatografia Líquida de Alta Eficiência (CLAE). A influência da temperatura de HTL (300 e 350 °C) e vazão volumétrica (5 e 10 mL.min-1) nos rendimentos e perfis químicos do produto sólido (hidro-char) foi avaliada pela análise elementar e pela FT-IR, e do produto líquido (bio-óleo), pela Cromatografia Gasosa acoplada à Espectrometria de Massas (GC-MS) para análise da composição e perfil químico dos produtos gerados entre as duas rotas. As maiores concentrações de açúcares (7,49 ± 1,97 g.L-1) e ácidos orgânicos (9,35 ± 3,46 g.L-1) foram observadas nas condições de 260 °C e 5 mL.min-1, enquanto a de inibidores (7,64 ± 1,87 g.L-1) foi observada nas condições de 230 °C e 5 mL.min-1. A amostragem de hidrolisados no processo sequencial resultou em menor rendimento global frente à HTL. A composição elementar do hidro-char produzido pelo processo sequencial e a HTL foi similar, assim como o poder calorífico superior (26,06 e 26,15 MJ.kg-1, respectivamente); observou-se maior concentração de grupos orgânicos oxigenados no hidro-char do processo sequencial. O bio-óleo produzido pelo processo sequencial exibiu maior concentração de compostos nitrogenados e oxigenados que o produzido na HTL.Universidade Federal de Santa MariaBrasilEngenharia QuímicaUFSMPrograma de Pós-Graduação em Engenharia QuímicaCentro de TecnologiaCastilhos, Fernanda dehttp://lattes.cnpq.br/4590978604104577Perez, Daniel LachosZabot, Giovani LeoneMorais, Ana Rita ColaçoVieira, João Cláudio Martins2023-01-10T13:00:07Z2023-01-10T13:00:07Z2022-08-22info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://repositorio.ufsm.br/handle/1/27541porAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2023-01-13T14:03:36Zoai:repositorio.ufsm.br:1/27541Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2023-01-13T14:03:36Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Avaliação do processo sequencial de hidrólise e liquefação hidrotérmica do sabugo de milho Sugars and bio-oil production by sequential hydrothermal processing of corn cob |
title |
Avaliação do processo sequencial de hidrólise e liquefação hidrotérmica do sabugo de milho |
spellingShingle |
Avaliação do processo sequencial de hidrólise e liquefação hidrotérmica do sabugo de milho Vieira, João Cláudio Martins Biomassa Liquefação hidrotérmica Hidrólise Bio-óleo Hidro-char Biomass Hydrothermal liquefaction SWE Bio-oil Hydrochar CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Avaliação do processo sequencial de hidrólise e liquefação hidrotérmica do sabugo de milho |
title_full |
Avaliação do processo sequencial de hidrólise e liquefação hidrotérmica do sabugo de milho |
title_fullStr |
Avaliação do processo sequencial de hidrólise e liquefação hidrotérmica do sabugo de milho |
title_full_unstemmed |
Avaliação do processo sequencial de hidrólise e liquefação hidrotérmica do sabugo de milho |
title_sort |
Avaliação do processo sequencial de hidrólise e liquefação hidrotérmica do sabugo de milho |
author |
Vieira, João Cláudio Martins |
author_facet |
Vieira, João Cláudio Martins |
author_role |
author |
dc.contributor.none.fl_str_mv |
Castilhos, Fernanda de http://lattes.cnpq.br/4590978604104577 Perez, Daniel Lachos Zabot, Giovani Leone Morais, Ana Rita Colaço |
dc.contributor.author.fl_str_mv |
Vieira, João Cláudio Martins |
dc.subject.por.fl_str_mv |
Biomassa Liquefação hidrotérmica Hidrólise Bio-óleo Hidro-char Biomass Hydrothermal liquefaction SWE Bio-oil Hydrochar CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
topic |
Biomassa Liquefação hidrotérmica Hidrólise Bio-óleo Hidro-char Biomass Hydrothermal liquefaction SWE Bio-oil Hydrochar CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
description |
The growing energy demand and limitations in the use of fossil fuels encourage the research of different renewable energy sources, such as agro-industrial residues. The corn crop in Brazil corresponds to 40% of the national grain production, generating significant amounts of waste such as leaves, straw, stalks, and cobs, potential sources of selected chemical products and energy that became the focus of different studies for their valorization. Therefore, sequential hydrolysis and hydrothermal liquefaction (HTL) of corn cob were investigated, in which hydrolysate samples were collected during the hydrolysis step prior to HTL. The biomass was characterized by physicochemical methods, elemental analysis and by Fourier Transform Infrared Spectrophotometry (FT-IR). An experimental unit in semi-continuous regime was developed to research the optimal parameters for bio-oil production at 15 MPa. The influence of hydrolysis temperature (230 and 260°C), and volumetric flow rate (5 and 10 mL.min-1) on the yields and kinetic profiles (0-15 min) of hydrolysates were evaluated using High Performance Liquid Chromatography (HPLC). The influence of HTL temperature (300 and 350 °C) and volumetric flow rate (5 and 10 mL.min-1) on the yields and chemical profiles of the solid product (hydro-char) was evaluated by elemental analysis and FT-IR, and of the liquid product (bio-oil), by Gas Chromatography coupled to Mass Spectrometry (GC-MS) to analyze the composition and chemical profile of the products generated between the two routes. The highest concentrations of sugars (7.49 ± 1.97 g.L-1) and organic acids (9.35 ± 3.46 g.L-1) were observed at 260 °C and 5 mL.min-1 conditions, while that of inhibitors (7.64 ± 1.87 g.L-1) were observed at 230 °C and 5 mL.min-1 conditions. Sampling hydrolysates in the sequential process resulted in lower overall yield compared to HTL. The elemental composition of the hydro-char produced by the sequential process and the HTL were similar, as well as the higher heating value (26.06 and 26.15 MJ.kg-1, respectively); a higher concentration of oxygenated organic groups was observed in the hydro-char from the sequential process. The bio-oil produced by the sequential process exhibited a higher concentration of nitrogenous and oxygenated compounds than that produced in the HTL. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-08-22 2023-01-10T13:00:07Z 2023-01-10T13:00:07Z |
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://repositorio.ufsm.br/handle/1/27541 |
url |
http://repositorio.ufsm.br/handle/1/27541 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Brasil Engenharia Química UFSM Programa de Pós-Graduação em Engenharia Química Centro de Tecnologia |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Brasil Engenharia Química UFSM Programa de Pós-Graduação em Engenharia Química Centro de Tecnologia |
dc.source.none.fl_str_mv |
reponame:Manancial - Repositório Digital da UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Manancial - Repositório Digital da UFSM |
collection |
Manancial - Repositório Digital da UFSM |
repository.name.fl_str_mv |
Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
atendimento.sib@ufsm.br||tedebc@gmail.com |
_version_ |
1805922175697289216 |