Hidrólise ácida de biomassa assistida por ultrassom para obtenção de furfural
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/18845 |
Resumo: | In this work, the applicability of ultrasound (US) for synthesis of furfural from biomass was investigated. Several US systems (baths, probes and a cup horn system) with different frequencies and power were evaluated (from 20 to 130 kHz and from 100 to 750 W, respectively). Acid hydrolysis assisted by ultrasound (UAAH) was performed and the following acids were evaluated: H2SO4, HNO3, HCl e C2O2H4. For the comparison of results, acid hydrolysis was also tried by using mechanical stirring (100 rpm) at the same conditions of time, temperature and acid concentration. Better results were obtained by using the cup horn system and a diluted solution of HNO3. After choosing the more suitable system, the following process parameters were evaluated in order to obtain better efficiency of conversion: temperature of reaction, acid concentration, sonication time, US amplitude and sample mass. The more suitable conditions were: 60 min of US (cup horn, 20 kHz, 750 W, amplitude of 50%) at 30 ºC for the treatment of 100 mg of biomass and 20 mL of 4 mol L-1 HNO3. Several biomass matrices (rice husk, cane straw, yerba-mate after infusion, grass and wood residue) were submitted to the UAAH process. The biomass conversion to furfural was from 36.4 to 223 mg g-1of biomass. It is important to emphasize that using the same experimental conditions but without ultrasound (mechanical stirring) the conversion of biomass to furfural was not observed. Functional groups and morphology of residues of UAAH process were evaluated by infrared spectroscopy and scanning electron microscopy. Chromatographic parameters for the determination of furfural by gas chromatography with flame ionization detector (GC-FID) were also optimized. The proposed process allowed the furfural synthesis using mild temperature conditions, diluted acids and with minimization of organic solvents. |
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2019-11-07T20:35:07Z2019-11-07T20:35:07Z2017-07-12http://repositorio.ufsm.br/handle/1/18845In this work, the applicability of ultrasound (US) for synthesis of furfural from biomass was investigated. Several US systems (baths, probes and a cup horn system) with different frequencies and power were evaluated (from 20 to 130 kHz and from 100 to 750 W, respectively). Acid hydrolysis assisted by ultrasound (UAAH) was performed and the following acids were evaluated: H2SO4, HNO3, HCl e C2O2H4. For the comparison of results, acid hydrolysis was also tried by using mechanical stirring (100 rpm) at the same conditions of time, temperature and acid concentration. Better results were obtained by using the cup horn system and a diluted solution of HNO3. After choosing the more suitable system, the following process parameters were evaluated in order to obtain better efficiency of conversion: temperature of reaction, acid concentration, sonication time, US amplitude and sample mass. The more suitable conditions were: 60 min of US (cup horn, 20 kHz, 750 W, amplitude of 50%) at 30 ºC for the treatment of 100 mg of biomass and 20 mL of 4 mol L-1 HNO3. Several biomass matrices (rice husk, cane straw, yerba-mate after infusion, grass and wood residue) were submitted to the UAAH process. The biomass conversion to furfural was from 36.4 to 223 mg g-1of biomass. It is important to emphasize that using the same experimental conditions but without ultrasound (mechanical stirring) the conversion of biomass to furfural was not observed. Functional groups and morphology of residues of UAAH process were evaluated by infrared spectroscopy and scanning electron microscopy. Chromatographic parameters for the determination of furfural by gas chromatography with flame ionization detector (GC-FID) were also optimized. The proposed process allowed the furfural synthesis using mild temperature conditions, diluted acids and with minimization of organic solvents.No presente trabalho foi investigada a utilização do ultrassom (US) no processo de hidrólise ácida de biomassa para síntese de furfural. Foram avaliados diversos sistemas de US (banhos, sondas e cup horns), com diferentes frequências e potências nominais (20 à 130 kHz de frequência e 100 à 750 W de potência nominal). Para o processo de hidrólise ácida assistida por ultrassom (UAAH) foram avaliados H2SO4, HNO3, HCl e C2O2H4. Para comparação dos resultados foi feito o processo de hidrólise ácida utilizando agitação mecânica (100 rpm) nas mesmas condições de tempo, temperatura e concentração ácida. Resultados satisfatórios foram obtidos utilizando o sistema de cup horn e soluções diluídas de HNO3. Após a escolha do sistema mais adequado, foram avaliados parâmetros de processo, tais como: temperatura reacional, concentração de ácido, tempo de sonicação, amplitude de US e massa de amostra. Após a otimização dos parâmetros de processo, a condição mais adequada para UAAH foi de 60 min de US (cup horn, 20 kHz, 750 W, amplitude de 50%), temperatura de 30 °C, 100 mg de biomassa e 20 mL de HNO3 4 mol L-1. Diversas matrizes de biomassa (casca de arroz, palha-de-cana, erva-mate após preparo do chimarrão, pastagem animal e resíduo madeireiro) foram submetidas ao processo de UAAH. A conversão de biomassa a furfural foi de 3,64 à 22,3%. Cabe destacar que sem a aplicação de US (somente agitação mecânica), não foi observada a conversão de biomassa a furfural. Adicionalmente, foi feita a caracterização dos grupos funcionais e análise morfológica dos resíduos do processo de UAAH por espectroscopia de infravermelho (IR) e microscopia eletrônica de varredura (SEM). Foram otimizados os parâmetros cromatográficos para determinação de furfural por cromatografia a gás com detector de ionização por chama (GC-FID). O processo proposto permitiu a síntese de furfural em condições brandas de temperatura, utilizando ácidos diluídos e com uso reduzido de solventes orgânicos.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESporUniversidade Federal de Santa MariaCentro de TecnologiaPrograma de Pós-Graduação em Engenharia QuímicaUFSMBrasilEngenharia QuímicaAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessEngenharia químicaUltrassomHidrólise ácidaBiomassaCromatografiaCNPQ::ENGENHARIAS::ENGENHARIA QUIMICAHidrólise ácida de biomassa assistida por ultrassom para obtenção de furfuralinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisFlores, Érico Marlon de Moraeshttp://lattes.cnpq.br/7167629055579212Dallago, Rogério Marcoshttp://lattes.cnpq.br/3006526142468362Bizzi, Cezar Augustohttp://lattes.cnpq.br/2975070149037006http://lattes.cnpq.br/0010057867877297Santos, Daniel dos300600000006600a9c2788c-7913-4d7b-92e1-3429800ac02826b1efbd-b231-4ed0-8b74-18f71e823b9d0dbbadf5-01f5-4c49-8ae6-5a88d86d1f84ea5d5aeb-956d-4091-b711-982595b3e995reponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALDIS_PPGEQ_2017_SANTOS_DANIEL.pdfDIS_PPGEQ_2017_SANTOS_DANIEL.pdfDissertação de Mestradoapplication/pdf4198647http://repositorio.ufsm.br/bitstream/1/18845/1/DIS_PPGEQ_2017_SANTOS_DANIEL.pdfa6fa047ab51d108bc631c174f6b9bb50MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8805http://repositorio.ufsm.br/bitstream/1/18845/2/license_rdf4460e5956bc1d1639be9ae6146a50347MD52LICENSElicense.txtlicense.txttext/plain; charset=utf-816http://repositorio.ufsm.br/bitstream/1/18845/3/license.txtf8fcb28efb1c8cf0dc096bec902bf4c4MD53TEXTDIS_PPGEQ_2017_SANTOS_DANIEL.pdf.txtDIS_PPGEQ_2017_SANTOS_DANIEL.pdf.txtExtracted texttext/plain157269http://repositorio.ufsm.br/bitstream/1/18845/4/DIS_PPGEQ_2017_SANTOS_DANIEL.pdf.txt2cd32d4098d2d672353fb19fc3c309d0MD54THUMBNAILDIS_PPGEQ_2017_SANTOS_DANIEL.pdf.jpgDIS_PPGEQ_2017_SANTOS_DANIEL.pdf.jpgIM Thumbnailimage/jpeg4418http://repositorio.ufsm.br/bitstream/1/18845/5/DIS_PPGEQ_2017_SANTOS_DANIEL.pdf.jpg93824bb97c5fa85e9f114d0100def8a3MD551/188452019-11-08 03:01:31.504oai:repositorio.ufsm.br:1/18845Q3JlYXRpdmUgQ29tbW9ucw==Repositório Institucionalhttp://repositorio.ufsm.br/PUBhttp://repositorio.ufsm.br/oai/requestopendoar:39132019-11-08T06:01:31Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Hidrólise ácida de biomassa assistida por ultrassom para obtenção de furfural |
title |
Hidrólise ácida de biomassa assistida por ultrassom para obtenção de furfural |
spellingShingle |
Hidrólise ácida de biomassa assistida por ultrassom para obtenção de furfural Santos, Daniel dos Engenharia química Ultrassom Hidrólise ácida Biomassa Cromatografia CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Hidrólise ácida de biomassa assistida por ultrassom para obtenção de furfural |
title_full |
Hidrólise ácida de biomassa assistida por ultrassom para obtenção de furfural |
title_fullStr |
Hidrólise ácida de biomassa assistida por ultrassom para obtenção de furfural |
title_full_unstemmed |
Hidrólise ácida de biomassa assistida por ultrassom para obtenção de furfural |
title_sort |
Hidrólise ácida de biomassa assistida por ultrassom para obtenção de furfural |
author |
Santos, Daniel dos |
author_facet |
Santos, Daniel dos |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Flores, Érico Marlon de Moraes |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/7167629055579212 |
dc.contributor.referee1.fl_str_mv |
Dallago, Rogério Marcos |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/3006526142468362 |
dc.contributor.referee2.fl_str_mv |
Bizzi, Cezar Augusto |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/2975070149037006 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/0010057867877297 |
dc.contributor.author.fl_str_mv |
Santos, Daniel dos |
contributor_str_mv |
Flores, Érico Marlon de Moraes Dallago, Rogério Marcos Bizzi, Cezar Augusto |
dc.subject.por.fl_str_mv |
Engenharia química Ultrassom Hidrólise ácida Biomassa Cromatografia |
topic |
Engenharia química Ultrassom Hidrólise ácida Biomassa Cromatografia CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
description |
In this work, the applicability of ultrasound (US) for synthesis of furfural from biomass was investigated. Several US systems (baths, probes and a cup horn system) with different frequencies and power were evaluated (from 20 to 130 kHz and from 100 to 750 W, respectively). Acid hydrolysis assisted by ultrasound (UAAH) was performed and the following acids were evaluated: H2SO4, HNO3, HCl e C2O2H4. For the comparison of results, acid hydrolysis was also tried by using mechanical stirring (100 rpm) at the same conditions of time, temperature and acid concentration. Better results were obtained by using the cup horn system and a diluted solution of HNO3. After choosing the more suitable system, the following process parameters were evaluated in order to obtain better efficiency of conversion: temperature of reaction, acid concentration, sonication time, US amplitude and sample mass. The more suitable conditions were: 60 min of US (cup horn, 20 kHz, 750 W, amplitude of 50%) at 30 ºC for the treatment of 100 mg of biomass and 20 mL of 4 mol L-1 HNO3. Several biomass matrices (rice husk, cane straw, yerba-mate after infusion, grass and wood residue) were submitted to the UAAH process. The biomass conversion to furfural was from 36.4 to 223 mg g-1of biomass. It is important to emphasize that using the same experimental conditions but without ultrasound (mechanical stirring) the conversion of biomass to furfural was not observed. Functional groups and morphology of residues of UAAH process were evaluated by infrared spectroscopy and scanning electron microscopy. Chromatographic parameters for the determination of furfural by gas chromatography with flame ionization detector (GC-FID) were also optimized. The proposed process allowed the furfural synthesis using mild temperature conditions, diluted acids and with minimization of organic solvents. |
publishDate |
2017 |
dc.date.issued.fl_str_mv |
2017-07-12 |
dc.date.accessioned.fl_str_mv |
2019-11-07T20:35:07Z |
dc.date.available.fl_str_mv |
2019-11-07T20:35:07Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/masterThesis |
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masterThesis |
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publishedVersion |
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http://repositorio.ufsm.br/handle/1/18845 |
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http://repositorio.ufsm.br/handle/1/18845 |
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por |
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por |
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300600000006 |
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600 |
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Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
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Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
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openAccess |
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Universidade Federal de Santa Maria Centro de Tecnologia |
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Programa de Pós-Graduação em Engenharia Química |
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UFSM |
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Brasil |
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Engenharia Química |
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Universidade Federal de Santa Maria Centro de Tecnologia |
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