Avaliação do processo sequencial de hidrólise e liquefação hidrotérmica do sabugo de milho

Detalhes bibliográficos
Autor(a) principal: Vieira, João Cláudio Martins
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.
id UFSM_b63db1a48d53a9afbaad9ee563f44486
oai_identifier_str oai:repositorio.ufsm.br:1/27541
network_acronym_str UFSM
network_name_str Manancial - Repositório Digital da UFSM
repository_id_str
spelling 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