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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
18/10/2019 |
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Data da última atualização: |
17/11/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LOURENÇON, T. V.; ALAKURTII, S.; VIRTANEN, T.; JÄÄSKELÄINEN, A.-S.; LIITIÄ, T.; HUGHES, M.; MAGALHAES, W. L. E.; BOLZON DE MUNIZ, G. I.; TAMMINEN, T. |
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Afiliação: |
Tainise V. Lourençon, Aalto UniversitY; Sami Alakurtti, VTT Technical Research Centre of Finland; Tommi Virtanen, VTT Technical Research Centre of Finland; Anna-Stiina Jääskeläinen, VTT Technical Research Centre of Finland; Tiina Liitiä, VTT Technical Research Centre of Finland; Mark Hughes, Aalto University; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Graciela I. Bolzon de Muniz, UFPR; Tarja Tamminen, VTT Technical Research Centre of Finland. |
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Título: |
Phenol-formaldehyde resins with suitable bonding strength synthesized from "less-reactive" hardwood lignin fractions. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Holzforschung, v. 74, n. 2, p. 175-183, Feb. 2020. |
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DOI: |
10.1515/hf-2018-0203 |
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Idioma: |
Inglês |
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Conteúdo: |
The substitution of phenol by lignin in phenol-formaldehyde (PF) resins is one of the most promising end uses of lignin valorization. Lignin from grasses and softwood has been the focus of the studies in this field as they present a higher number of theoretical reactive sites for resin synthesis. Herein we examined the composition and chemical reactivity of ?less-reactive? hardwood lignin fractions and their performance in PF resins, synthesized by substituting 50 wt% of the phenol with lignin. Before resin synthesis, the samples were hydroxymethylated and the maximum formaldehyde consumption was recorded. By doing so, we observed that hardwood fractions consumed formaldehyde close to the theoretical calculation, whereas the reference softwood lignin consumed only about ¼ of the theoretical value. In the resin synthesis, we added formaldehyde to the formulation according to the measured maximum formaldehyde consumption. Thus, low values of free formaldehyde in lignin-PF (LPF) resins were achieved (<0.23%). Moreover, the resin bonding strength displayed similar performance irrespective of whether the LPF resins were made with softwood or hardwood lignin (range of 3.4?4.8 N mm?2 at 150°C and 45?480 s of press time). Furthermore, we concluded that hardwood kraft lignins present no disadvantage compared to softwood lignins in PF resin applications, which have significant practical implications. |
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Palavras-Chave: |
Formaldehyde consumption; Formaldeído; Kraft; Phenolic resins; Reactive sites; Resina fenólica; Technical lignin. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02355naa a2200313 a 4500
001 2113225
005 2020-11-17
008 2020 bl uuuu u00u1 u #d
024 7 $a10.1515/hf-2018-0203$2DOI
100 1 $aLOURENÇON, T. V.
245 $aPhenol-formaldehyde resins with suitable bonding strength synthesized from "less-reactive" hardwood lignin fractions.$h[electronic resource]
260 $c2020
520 $aThe substitution of phenol by lignin in phenol-formaldehyde (PF) resins is one of the most promising end uses of lignin valorization. Lignin from grasses and softwood has been the focus of the studies in this field as they present a higher number of theoretical reactive sites for resin synthesis. Herein we examined the composition and chemical reactivity of ?less-reactive? hardwood lignin fractions and their performance in PF resins, synthesized by substituting 50 wt% of the phenol with lignin. Before resin synthesis, the samples were hydroxymethylated and the maximum formaldehyde consumption was recorded. By doing so, we observed that hardwood fractions consumed formaldehyde close to the theoretical calculation, whereas the reference softwood lignin consumed only about ¼ of the theoretical value. In the resin synthesis, we added formaldehyde to the formulation according to the measured maximum formaldehyde consumption. Thus, low values of free formaldehyde in lignin-PF (LPF) resins were achieved (<0.23%). Moreover, the resin bonding strength displayed similar performance irrespective of whether the LPF resins were made with softwood or hardwood lignin (range of 3.4?4.8 N mm?2 at 150°C and 45?480 s of press time). Furthermore, we concluded that hardwood kraft lignins present no disadvantage compared to softwood lignins in PF resin applications, which have significant practical implications.
653 $aFormaldehyde consumption
653 $aFormaldeído
653 $aKraft
653 $aPhenolic resins
653 $aReactive sites
653 $aResina fenólica
653 $aTechnical lignin
700 1 $aALAKURTII, S.
700 1 $aVIRTANEN, T.
700 1 $aJÄÄSKELÄINEN, A.-S.
700 1 $aLIITIÄ, T.
700 1 $aHUGHES, M.
700 1 $aMAGALHAES, W. L. E.
700 1 $aBOLZON DE MUNIZ, G. I.
700 1 $aTAMMINEN, T.
773 $tHolzforschung$gv. 74, n. 2, p. 175-183, Feb. 2020.
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Registro original: |
Embrapa Florestas (CNPF) |
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Registro |
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Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
30/08/2022 |
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Data da última atualização: |
30/08/2022 |
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Autoria: |
SILVA, C. E. S. da; BATALHA, L. A. R.; CARVALHO, A. M. de; OLIVEIRA, V. B. L. G. de; CARVALHO, A. M. M. L.; CARNEIRO, A. de C. O.; GOMES, F. J. B. |
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Afiliação: |
CARLOS EDUARDO SILVEIRA DA SILVA, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; LARISSE APARECIDA RIBAS BATALHA, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; ALEXANDRE MONTEIRO DE CARVALHO, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; VINICIUS BOHRER LOBOSCO GONZAGA DE OLIVEIRA, EKOVE; ANA MÁRCIA MACEDO LADEIRA CARVALHO, UNIVERSIDADE FEDERAL DE VIÇOSA; ANGÉLICA DE CÁSSIA OLIVEIRA CARNEIRO, UNIVERSIDADE FEDERAL DE VIÇOSA; FERNANDO JOSÉ BORGES GOMES, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO. |
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Título: |
Evaluation of kraft lignin and residues of sawmill for producing briquettes. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Pesquisa Florestal Brasileira, v. 42, e202102186, p. 1-12, 2022. |
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DOI: |
https://doi.org/10.4336/2022.pfb.42e202102186 |
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Idioma: |
Português |
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Conteúdo: |
ABSTRACT. The aim of becoming a society based on the rational utilization of the natural resources, has led to the consideration of many alternatives by academic and industrial sectors. The forest sector may be particularly prominent in trying to achieve these goals when using residues of their processes, for timber and pulp production. One of the most important requirements in society is the energy production. Co-products of wood processing and cellulose mills can be used for bioenergy generation. The densification of biomass involves handling, transportation and storage issues, and furthermore, when industrial forest residues such as lignin are added to this biomass, the final energetic product may have some improved properties, adding value to the chain. The purpose of this study was to evaluate the usage of the woody industrial waste, the sawdust from Joannesia princeps Vellozo enriched with Kraft lignin as an additive, aiming to produce briquettes. One of the main findings from this work was the possibility to obtain a briquette with better properties (higher bulk density and higher resistance) when using 6% of Kraft lignin as an additive and a pressure of 1500 PSI. RESUMO. O objetivo de se tornar uma sociedade baseada na utilização racional dos recursos naturais, tem levado à consideração de muitas alternativas pela academia e setor industrial. O setor florestal pode ter um destaque especial na tentativa de atingir esses objetivos ao utilizar resíduos de seus processos. Um dos requisitos mais importantes da sociedade é a produção de energia. Coprodutos do beneficiamento da madeira e das usinas de celulose podem ser utilizados no desenvolvimento da geração de bioenergia. A densificação da biomassa envolve questões de manuseio, transporte e armazenamento e, ainda, quando resíduos florestais industriais como a lignina são adicionados a essa biomassa, o produto energético final pode ter algumas propriedades melhoradas, agregando valor à cadeia produtiva. O objetivo deste estudo foi avaliar o aproveitamento do resíduo industrial lenhoso, a serragem de Joannesia princeps Vellozo enriquecida com lignina Kraft como aditivo, visando à produção de briquetes. Um dos principais resultados deste trabalho foi a possibilidade de se obter um briquete com melhores propriedades (maior densidade aparente e maior resistência) ao usar 6% de lignina Kraft como aditivo e pressão de 1500 PSI. MenosABSTRACT. The aim of becoming a society based on the rational utilization of the natural resources, has led to the consideration of many alternatives by academic and industrial sectors. The forest sector may be particularly prominent in trying to achieve these goals when using residues of their processes, for timber and pulp production. One of the most important requirements in society is the energy production. Co-products of wood processing and cellulose mills can be used for bioenergy generation. The densification of biomass involves handling, transportation and storage issues, and furthermore, when industrial forest residues such as lignin are added to this biomass, the final energetic product may have some improved properties, adding value to the chain. The purpose of this study was to evaluate the usage of the woody industrial waste, the sawdust from Joannesia princeps Vellozo enriched with Kraft lignin as an additive, aiming to produce briquettes. One of the main findings from this work was the possibility to obtain a briquette with better properties (higher bulk density and higher resistance) when using 6% of Kraft lignin as an additive and a pressure of 1500 PSI. RESUMO. O objetivo de se tornar uma sociedade baseada na utilização racional dos recursos naturais, tem levado à consideração de muitas alternativas pela academia e setor industrial. O setor florestal pode ter um destaque especial na tentativa de atingir esses objetivos ao utilizar resíduos de seus processos... Mostrar Tudo |
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Palavras-Chave: |
Potential uses; Recursos naturais; Usos potenciais. |
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Thesagro: |
Biomassa. |
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Thesaurus NAL: |
Biomass; Natural resources. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1145895/1/EmbrapaFlorestas-PFB-2022-EvaluationKraftLigninResiduesSawmilBriquettesF.pdf
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Marc: |
LEADER 03298naa a2200277 a 4500
001 2145895
005 2022-08-30
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.4336/2022.pfb.42e202102186$2DOI
100 1 $aSILVA, C. E. S. da
245 $aEvaluation of kraft lignin and residues of sawmill for producing briquettes.$h[electronic resource]
260 $c2022
520 $aABSTRACT. The aim of becoming a society based on the rational utilization of the natural resources, has led to the consideration of many alternatives by academic and industrial sectors. The forest sector may be particularly prominent in trying to achieve these goals when using residues of their processes, for timber and pulp production. One of the most important requirements in society is the energy production. Co-products of wood processing and cellulose mills can be used for bioenergy generation. The densification of biomass involves handling, transportation and storage issues, and furthermore, when industrial forest residues such as lignin are added to this biomass, the final energetic product may have some improved properties, adding value to the chain. The purpose of this study was to evaluate the usage of the woody industrial waste, the sawdust from Joannesia princeps Vellozo enriched with Kraft lignin as an additive, aiming to produce briquettes. One of the main findings from this work was the possibility to obtain a briquette with better properties (higher bulk density and higher resistance) when using 6% of Kraft lignin as an additive and a pressure of 1500 PSI. RESUMO. O objetivo de se tornar uma sociedade baseada na utilização racional dos recursos naturais, tem levado à consideração de muitas alternativas pela academia e setor industrial. O setor florestal pode ter um destaque especial na tentativa de atingir esses objetivos ao utilizar resíduos de seus processos. Um dos requisitos mais importantes da sociedade é a produção de energia. Coprodutos do beneficiamento da madeira e das usinas de celulose podem ser utilizados no desenvolvimento da geração de bioenergia. A densificação da biomassa envolve questões de manuseio, transporte e armazenamento e, ainda, quando resíduos florestais industriais como a lignina são adicionados a essa biomassa, o produto energético final pode ter algumas propriedades melhoradas, agregando valor à cadeia produtiva. O objetivo deste estudo foi avaliar o aproveitamento do resíduo industrial lenhoso, a serragem de Joannesia princeps Vellozo enriquecida com lignina Kraft como aditivo, visando à produção de briquetes. Um dos principais resultados deste trabalho foi a possibilidade de se obter um briquete com melhores propriedades (maior densidade aparente e maior resistência) ao usar 6% de lignina Kraft como aditivo e pressão de 1500 PSI.
650 $aBiomass
650 $aNatural resources
650 $aBiomassa
653 $aPotential uses
653 $aRecursos naturais
653 $aUsos potenciais
700 1 $aBATALHA, L. A. R.
700 1 $aCARVALHO, A. M. de
700 1 $aOLIVEIRA, V. B. L. G. de
700 1 $aCARVALHO, A. M. M. L.
700 1 $aCARNEIRO, A. de C. O.
700 1 $aGOMES, F. J. B.
773 $tPesquisa Florestal Brasileira$gv. 42, e202102186, p. 1-12, 2022.
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