Ozon?lise da biomassa lignocelul?sica (baga?o de cana) visando a redu??o do teor de lignina e do ?cido p-Cum?rico. 2013

Detalhes bibliográficos
Ano de defesa: 2013
Autor(a) principal: Silva, Bruno Couto da lattes
Orientador(a): Abreu, Heber dos Santos lattes
Banca de defesa: Lelis, Roberto Carlos Costa, Muniz, Graciela Ines Bolzon de
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal Rural do Rio de Janeiro
Programa de Pós-Graduação: Programa de P?s-Gradua??o em Ci?ncias Ambientais e Florestais
Departamento: Instituto de Florestas
País: Brasil
Palavras-chave em Português:
Parede celular
oz?nio
infravermelho
Celulose
RMN 13C
Palavras-chave em Inglês:
Cell wall
ozone
infrared
Cellulose
13C NMR
Área do conhecimento CNPq:
Ci?ncias Agr?rias
Link de acesso: https://tede.ufrrj.br/jspui/handle/jspui/3477
Resumo: This research aimed to reduce lignin and p-coumaric acid content through ozonolysis using sugarcane bagasse to obtain a material with lower recalcitrance. Ozone was produced by an ozone generator with medical purity oxygen. The reaction occurred in a glass column with continuous ozone flow at 400 mg / h. The standardization of the ozone flow was performed by iodometry. As a sample, it was used sugarcane bagasse (Saccharum spp), variety rb867515 pre-extracted with ethanol PA. The bagasse was previously ground, and lignin and p-coumaric acid determined by the Klason method (24%) and HPLC (96 mg / ml), respectively. Infrared (FTIR) transmittance mode analyses of control sample, and the reaction products under neutral, basic and acidic pH revealed that the reactions promoted biomass transformations related to structural characteristics of the original lignin content. The observed infrared signals were quantitated by baseline correction using the signal 1500 cm-1 as internal standard. Spectra were recorded 13C NMR CP / MAS solid samples as well as control of the ozonolysis products. For the analysis of p-coumaric acid content, it was used a method for the determination of phenolic acids in the cell wall described in specific literature. The determination of p-coumaric acid was performed by HPLC using standard from FLUKA, inc. to obtain calibration curve. It was found 96.?g/ml on control sample, whereas in neutral condition 6h was found 4.9 mg / ml, in basic 2h was found 7.5 mg / ml and in 4h acid was found 9.5 g / ml. There was a significant loss of lignin, as determined by the Klason method, reducing the original 24% lignin of the control sample to 7.55% (2 h), 8.72% (4 h) and 13.78% (6 h) under neutral conditions, 11.70% (2 h), 13.83% (4 h) and 9:35% (6 h) and 6.67% (2 h) 6.67% (4 h) and 13.04% (6 h) in acidic pH. These results showed that the process of ozonolysis reduced the lignin content and p-coumaric acid concentration in the biomass allowing the change of the proposed structural characteristic of lignin etheric structure for a condensed structure, indicating that the original recalcitrance was significantly reduced the observed characteristics final material. There were some losses of cellulose and hemicellulose. The analyzes showed no changes in these constituents.
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spelling Abreu, Heber dos Santos509.726.507-68http://lattes.cnpq.br/9089764354163346Lelis, Roberto Carlos CostaMuniz, Graciela Ines Bolzon de120.569.357-24http://lattes.cnpq.br/2321106089476676Silva, Bruno Couto da2020-04-30T19:16:13Z2013-05-24SILVA, Bruno Couto da. Ozon?lise da biomassa lignocelul?sica (baga?o de cana) visando a redu??o do teor de lignina e do ?cido p-Cum?rico. 2013. 2013. 56 f. Disserta??o (Programa de P?s-Gradua??o em Ci?ncias Ambientais e Florestais) - Universidade Federal Rural do Rio de Janeiro, Serop?dica.https://tede.ufrrj.br/jspui/handle/jspui/3477This research aimed to reduce lignin and p-coumaric acid content through ozonolysis using sugarcane bagasse to obtain a material with lower recalcitrance. Ozone was produced by an ozone generator with medical purity oxygen. The reaction occurred in a glass column with continuous ozone flow at 400 mg / h. The standardization of the ozone flow was performed by iodometry. As a sample, it was used sugarcane bagasse (Saccharum spp), variety rb867515 pre-extracted with ethanol PA. The bagasse was previously ground, and lignin and p-coumaric acid determined by the Klason method (24%) and HPLC (96 mg / ml), respectively. Infrared (FTIR) transmittance mode analyses of control sample, and the reaction products under neutral, basic and acidic pH revealed that the reactions promoted biomass transformations related to structural characteristics of the original lignin content. The observed infrared signals were quantitated by baseline correction using the signal 1500 cm-1 as internal standard. Spectra were recorded 13C NMR CP / MAS solid samples as well as control of the ozonolysis products. For the analysis of p-coumaric acid content, it was used a method for the determination of phenolic acids in the cell wall described in specific literature. The determination of p-coumaric acid was performed by HPLC using standard from FLUKA, inc. to obtain calibration curve. It was found 96.?g/ml on control sample, whereas in neutral condition 6h was found 4.9 mg / ml, in basic 2h was found 7.5 mg / ml and in 4h acid was found 9.5 g / ml. There was a significant loss of lignin, as determined by the Klason method, reducing the original 24% lignin of the control sample to 7.55% (2 h), 8.72% (4 h) and 13.78% (6 h) under neutral conditions, 11.70% (2 h), 13.83% (4 h) and 9:35% (6 h) and 6.67% (2 h) 6.67% (4 h) and 13.04% (6 h) in acidic pH. These results showed that the process of ozonolysis reduced the lignin content and p-coumaric acid concentration in the biomass allowing the change of the proposed structural characteristic of lignin etheric structure for a condensed structure, indicating that the original recalcitrance was significantly reduced the observed characteristics final material. There were some losses of cellulose and hemicellulose. The analyzes showed no changes in these constituents.Esta pesquisa teve como objetivo a redu??o dos teores de lignina e ?cido p-cum?rico por ozon?lise utilizando baga?o de cana-de-ac?car visando obter um material com menor propriedade de recalcitr?ncia. O oz?nio foi produzido por um ozonizador alimentado por oxig?nio de pureza medicinal. A rea??o ocorreu em uma coluna de vidro com fluxo cont?nuo de oz?nio de 400 mg/h. A padroniza??o do fluxo de oz?nio foi realizada por iodometria. Como amostra, foi utilizado o baga?o de cana (Saccharum spp), variedade rb867515 pr?-extra?do com etanol PA. O baga?o foi previamente mo?do, tendo seus teores de lignina e ?cido p-cum?rico determinados pelo m?todo de Klason (24 %) e por CLAE (96,91 ?g/ml) , respectivamente. Foram realizadas an?lises por infravermelho (FTIR) no modo transmit?ncia da amostra controle e dos produtos de rea??o em condi??es neutras, b?sicas e ?cidas, revelando que as rea??es promoveram trasnforma??es da biomassa relacionadas as caracteristicas estruturais originais da lignina controle. Os sinais observados foram quantificados por m?todo de linha base, utilizando o sinal 1500 cm-1 como padr?o interno. Foram registrados espectros de RMN 13C CP/MAS no estado s?lido das amostras controle assim como dos produtos de ozon?lise. Para as an?lise do teor de ?cido p-cum?rico das amostras, foi utilizado m?todo para a determina??o de ?cidos fen?licos da parede celular conforme descrito na literatura espec?fica. A determina??o do teor de ?cido p-cum?rico foi realizada por CLAE usando padr?o do mesmo ?cido de marca FLUKA ap?s tra?ada a curva de calibra??o. Foram encontrados 96,91?g/ml para amostra controle, nos produtos de ozon?lise em condi??o neutra 6h (4,9 ?g/ml), b?sico 2h (7.5 ?g/ml) e ?cido 4h (9.5 ?g/ml). Houve perda expressiva de lignina, determinadas atrav?s do m?todo de Klason, tendo reduzido de 24% da amostra controle para produtos de ozon?lise 7,55% (2 h); 8,72% (4 h) e 13,78% (6 h) em condi??es neutras, de 11,70% (2 h); 13.83% (4 h) e 9.35% (6 h) e 6.67% (2 h), 6,67% (4 h) e 13,04% (6 h) em meio ?cido. Os resultados mostraram que o processo de ozon?lise reduziu o teor de lignina e a concentra??o ?cido p-cum?rico na biomassa, permitindo, propor que houve mudan?a da caracteristica estrutural de lignina da amostra com estrutura et?rica para uma estrutura condensada, indicando que a recalcitr?ncia original foi significativamente reduzida, observadas as caracter?sticas finais do material. N?o foram determinadas as perdas de celulose e hemicelulose. Os espectros de RMN 13C n?o mostraram varia??es significativas desses constituintes.Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2020-04-30T19:16:12Z No. of bitstreams: 1 2013 - Bruno Couto da Silva.pdf: 4598422 bytes, checksum: e4985dfbfeb330a18221071cb7ebc2c8 (MD5)Made available in DSpace on 2020-04-30T19:16:13Z (GMT). No. of bitstreams: 1 2013 - Bruno Couto da Silva.pdf: 4598422 bytes, checksum: e4985dfbfeb330a18221071cb7ebc2c8 (MD5) Previous issue date: 2013-05-24Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior, CAPES, Brasil.application/pdfhttps://tede.ufrrj.br/retrieve/14532/2013%20-%20Bruno%20Couto%20da%20Silva.pdf.jpghttps://tede.ufrrj.br/retrieve/17494/2013%20-%20Bruno%20Couto%20da%20Silva.pdf.jpghttps://tede.ufrrj.br/retrieve/23782/2013%20-%20Bruno%20Couto%20da%20Silva.pdf.jpghttps://tede.ufrrj.br/retrieve/30106/2013%20-%20Bruno%20Couto%20da%20Silva.pdf.jpghttps://tede.ufrrj.br/retrieve/36534/2013%20-%20Bruno%20Couto%20da%20Silva.pdf.jpghttps://tede.ufrrj.br/retrieve/42954/2013%20-%20Bruno%20Couto%20da%20Silva.pdf.jpghttps://tede.ufrrj.br/retrieve/49324/2013%20-%20Bruno%20Couto%20da%20Silva.pdf.jpghttps://tede.ufrrj.br/retrieve/55730/2013%20-%20Bruno%20Couto%20da%20Silva.pdf.jpgporUniversidade Federal Rural do Rio de JaneiroPrograma de P?s-Gradua??o em Ci?ncias Ambientais e FlorestaisUFRRJBrasilInstituto de FlorestasABREU, H. 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dc.title.por.fl_str_mv Ozon?lise da biomassa lignocelul?sica (baga?o de cana) visando a redu??o do teor de lignina e do ?cido p-Cum?rico. 2013
dc.title.alternative.eng.fl_str_mv Ozonolysis of Lignocelulosic Biomass (sugarcane bagasse) seeking reduction of lignin content and p-coumaric acid. 2013.
title Ozon?lise da biomassa lignocelul?sica (baga?o de cana) visando a redu??o do teor de lignina e do ?cido p-Cum?rico. 2013
spellingShingle Ozon?lise da biomassa lignocelul?sica (baga?o de cana) visando a redu??o do teor de lignina e do ?cido p-Cum?rico. 2013
Silva, Bruno Couto da
Parede celular
oz?nio
infravermelho
Celulose
RMN 13C
Cell wall
ozone
infrared
Cellulose
13C NMR
Ci?ncias Agr?rias
title_short Ozon?lise da biomassa lignocelul?sica (baga?o de cana) visando a redu??o do teor de lignina e do ?cido p-Cum?rico. 2013
title_full Ozon?lise da biomassa lignocelul?sica (baga?o de cana) visando a redu??o do teor de lignina e do ?cido p-Cum?rico. 2013
title_fullStr Ozon?lise da biomassa lignocelul?sica (baga?o de cana) visando a redu??o do teor de lignina e do ?cido p-Cum?rico. 2013
title_full_unstemmed Ozon?lise da biomassa lignocelul?sica (baga?o de cana) visando a redu??o do teor de lignina e do ?cido p-Cum?rico. 2013
title_sort Ozon?lise da biomassa lignocelul?sica (baga?o de cana) visando a redu??o do teor de lignina e do ?cido p-Cum?rico. 2013
author Silva, Bruno Couto da
author_facet Silva, Bruno Couto da
author_role author
dc.contributor.advisor1.fl_str_mv Abreu, Heber dos Santos
dc.contributor.advisor1ID.fl_str_mv 509.726.507-68
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/9089764354163346
dc.contributor.referee1.fl_str_mv Lelis, Roberto Carlos Costa
dc.contributor.referee2.fl_str_mv Muniz, Graciela Ines Bolzon de
dc.contributor.authorID.fl_str_mv 120.569.357-24
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/2321106089476676
dc.contributor.author.fl_str_mv Silva, Bruno Couto da
contributor_str_mv Abreu, Heber dos Santos
Lelis, Roberto Carlos Costa
Muniz, Graciela Ines Bolzon de
dc.subject.por.fl_str_mv Parede celular
oz?nio
infravermelho
Celulose
RMN 13C
topic Parede celular
oz?nio
infravermelho
Celulose
RMN 13C
Cell wall
ozone
infrared
Cellulose
13C NMR
Ci?ncias Agr?rias
dc.subject.eng.fl_str_mv Cell wall
ozone
infrared
Cellulose
13C NMR
dc.subject.cnpq.fl_str_mv Ci?ncias Agr?rias
description This research aimed to reduce lignin and p-coumaric acid content through ozonolysis using sugarcane bagasse to obtain a material with lower recalcitrance. Ozone was produced by an ozone generator with medical purity oxygen. The reaction occurred in a glass column with continuous ozone flow at 400 mg / h. The standardization of the ozone flow was performed by iodometry. As a sample, it was used sugarcane bagasse (Saccharum spp), variety rb867515 pre-extracted with ethanol PA. The bagasse was previously ground, and lignin and p-coumaric acid determined by the Klason method (24%) and HPLC (96 mg / ml), respectively. Infrared (FTIR) transmittance mode analyses of control sample, and the reaction products under neutral, basic and acidic pH revealed that the reactions promoted biomass transformations related to structural characteristics of the original lignin content. The observed infrared signals were quantitated by baseline correction using the signal 1500 cm-1 as internal standard. Spectra were recorded 13C NMR CP / MAS solid samples as well as control of the ozonolysis products. For the analysis of p-coumaric acid content, it was used a method for the determination of phenolic acids in the cell wall described in specific literature. The determination of p-coumaric acid was performed by HPLC using standard from FLUKA, inc. to obtain calibration curve. It was found 96.?g/ml on control sample, whereas in neutral condition 6h was found 4.9 mg / ml, in basic 2h was found 7.5 mg / ml and in 4h acid was found 9.5 g / ml. There was a significant loss of lignin, as determined by the Klason method, reducing the original 24% lignin of the control sample to 7.55% (2 h), 8.72% (4 h) and 13.78% (6 h) under neutral conditions, 11.70% (2 h), 13.83% (4 h) and 9:35% (6 h) and 6.67% (2 h) 6.67% (4 h) and 13.04% (6 h) in acidic pH. These results showed that the process of ozonolysis reduced the lignin content and p-coumaric acid concentration in the biomass allowing the change of the proposed structural characteristic of lignin etheric structure for a condensed structure, indicating that the original recalcitrance was significantly reduced the observed characteristics final material. There were some losses of cellulose and hemicellulose. The analyzes showed no changes in these constituents.
publishDate 2013
dc.date.issued.fl_str_mv 2013-05-24
dc.date.accessioned.fl_str_mv 2020-04-30T19:16:13Z
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 SILVA, Bruno Couto da. Ozon?lise da biomassa lignocelul?sica (baga?o de cana) visando a redu??o do teor de lignina e do ?cido p-Cum?rico. 2013. 2013. 56 f. Disserta??o (Programa de P?s-Gradua??o em Ci?ncias Ambientais e Florestais) - Universidade Federal Rural do Rio de Janeiro, Serop?dica.
dc.identifier.uri.fl_str_mv https://tede.ufrrj.br/jspui/handle/jspui/3477
identifier_str_mv SILVA, Bruno Couto da. Ozon?lise da biomassa lignocelul?sica (baga?o de cana) visando a redu??o do teor de lignina e do ?cido p-Cum?rico. 2013. 2013. 56 f. Disserta??o (Programa de P?s-Gradua??o em Ci?ncias Ambientais e Florestais) - Universidade Federal Rural do Rio de Janeiro, Serop?dica.
url https://tede.ufrrj.br/jspui/handle/jspui/3477
dc.language.iso.fl_str_mv por
language por
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UNICA, Uni?o da Ind?stria de cana de A??car 2008. UNICA, Uni?o da Ind?stria de cana de A??car 2008. Statistics of sugarcane sector season Statistics of sugarcane sector season 2006/ 2007. 2006/ 2007. Dispon?vel em: http://www.portalunica.com.br/portalunica/files/ Dispon?vel em: http://www.portalunica.com.br/portalunica/files/ referencia_estatistireferencia_estatisticas_producaobrasilcas_producaobrasil--99--tabela.xlsS. tabela.xlsS. Acessado em 30 de mar?o de 2013Acessado em 30 de mar?o de 2013 WIKBERG, P-E. Occurrence, Morphology and Growth of Understory Saplings in Swedish Forests. Thesis (Doctoral Thesis) ? Department of Silviculture Ume?, Swedish University of Agricultural Sciences, Su?cia, 322p, 2004. YU, P.; McKINNON, J. J. CHRISTENSEN, D.A. Hydroxycinnamic acids and ferulic acid esterase in relation to biodegradation of complex plant cell walls, Canadian Journal Of Animal Science v.85, n.3. p. 255 ? 267, 2005
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