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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas; Embrapa Solos. |
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Data corrente: |
27/02/2013 |
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Data da última atualização: |
26/09/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
ALHO, C. F. B. V.; AUCCAISE, R.; MAIA, C. M. B. de F.; NOVOTNY, E. H.; LELIS, R. C. C. |
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Afiliação: |
CARLOS FRANCISCO BRAZÃO VIEIRA ALHO, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; RUBEN AUCCAISE, BOLSISTA CNPS; CLAUDIA MARIA BRANCO DE F MAIA, CNPF; ETELVINO HENRIQUE NOVOTNY, CNPS; ROBERTO CARLOS COSTA LELIS, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO. |
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Título: |
Using solid state 13C NMR to study pyrolysis final temperature effects on biochar stability. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
In: XU, J.; WU, J.; HE, Y. (ed.). Functions of natural organic matter in changing environment. Dordrecht: Springer, 2013. p. 1007-1011. |
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DOI: |
https://doi.org/10.1007/978-94-007-5634-2_186 |
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Idioma: |
Inglês |
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Conteúdo: |
Recent results in biochar research show that it is not only composed of stable carbon, since a portion of these materials is degraded relatively easily once applied to soil, and this condition is most dependent on pyrolysis conditions, especially the final temperature. Thus, the aim of this study was to evaluate pyrolysis final temperature effects on the stability of biochar produced from forest residues using solid-state 13C NMR. Pyrolysis was performed at a heating rate of 10°C·min-1 up to the final temperature of interest (350, 450 and 550°C), maintaining this temperature for 60 min. Solid-state 13C NMR spectra were obtained on a Varian 500-MHz spectrometer for fresh wood and biochars produced at 350, 450 and 550°C for Eucalyptus dunnii (DUN) and Pinus caribaea (CAR). Comparing fresh samples with their respective biochars, regardless of the botanical group, after pyrolysis, carbohydrates are degraded, and there is a change in the structure of the materials, with a predominance of aromatic structures, which are more resistant to degradation, therefore reflecting in the increased stability of these materials. For 350°C, it is still possible to observe signals related to lignin indicating that up to this temperature it has not been completely degraded. The spectra of biochars produced at 450 and 550°C are very similar, indicating that there is no need to produce biochars at very high final temperatures, since the structure of these materials obtained at 550°C slightly altered as of 450°C, keeping the predominance of aromatic structures. MenosRecent results in biochar research show that it is not only composed of stable carbon, since a portion of these materials is degraded relatively easily once applied to soil, and this condition is most dependent on pyrolysis conditions, especially the final temperature. Thus, the aim of this study was to evaluate pyrolysis final temperature effects on the stability of biochar produced from forest residues using solid-state 13C NMR. Pyrolysis was performed at a heating rate of 10°C·min-1 up to the final temperature of interest (350, 450 and 550°C), maintaining this temperature for 60 min. Solid-state 13C NMR spectra were obtained on a Varian 500-MHz spectrometer for fresh wood and biochars produced at 350, 450 and 550°C for Eucalyptus dunnii (DUN) and Pinus caribaea (CAR). Comparing fresh samples with their respective biochars, regardless of the botanical group, after pyrolysis, carbohydrates are degraded, and there is a change in the structure of the materials, with a predominance of aromatic structures, which are more resistant to degradation, therefore reflecting in the increased stability of these materials. For 350°C, it is still possible to observe signals related to lignin indicating that up to this temperature it has not been completely degraded. The spectra of biochars produced at 450 and 550°C are very similar, indicating that there is no need to produce biochars at very high final temperatures, since the structure of these materials obtained at 550°C slightly altere... Mostrar Tudo |
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Palavras-Chave: |
Forest residues; NMR; Organic matter stability; Pyrogenic carbon. |
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Thesaurus Nal: |
biochar. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02379nam a2200229 a 4500
001 2156892
005 2023-09-26
008 2013 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/978-94-007-5634-2_186$2DOI
100 1 $aALHO, C. F. B. V.
245 $aUsing solid state 13C NMR to study pyrolysis final temperature effects on biochar stability.$h[electronic resource]
260 $aIn: XU, J.; WU, J.; HE, Y. (ed.). Functions of natural organic matter in changing environment. Dordrecht: Springer, 2013. p. 1007-1011.$c1011
520 $aRecent results in biochar research show that it is not only composed of stable carbon, since a portion of these materials is degraded relatively easily once applied to soil, and this condition is most dependent on pyrolysis conditions, especially the final temperature. Thus, the aim of this study was to evaluate pyrolysis final temperature effects on the stability of biochar produced from forest residues using solid-state 13C NMR. Pyrolysis was performed at a heating rate of 10°C·min-1 up to the final temperature of interest (350, 450 and 550°C), maintaining this temperature for 60 min. Solid-state 13C NMR spectra were obtained on a Varian 500-MHz spectrometer for fresh wood and biochars produced at 350, 450 and 550°C for Eucalyptus dunnii (DUN) and Pinus caribaea (CAR). Comparing fresh samples with their respective biochars, regardless of the botanical group, after pyrolysis, carbohydrates are degraded, and there is a change in the structure of the materials, with a predominance of aromatic structures, which are more resistant to degradation, therefore reflecting in the increased stability of these materials. For 350°C, it is still possible to observe signals related to lignin indicating that up to this temperature it has not been completely degraded. The spectra of biochars produced at 450 and 550°C are very similar, indicating that there is no need to produce biochars at very high final temperatures, since the structure of these materials obtained at 550°C slightly altered as of 450°C, keeping the predominance of aromatic structures.
650 $abiochar
653 $aForest residues
653 $aNMR
653 $aOrganic matter stability
653 $aPyrogenic carbon
700 1 $aAUCCAISE, R.
700 1 $aMAIA, C. M. B. de F.
700 1 $aNOVOTNY, E. H.
700 1 $aLELIS, R. C. C.
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Registro original: |
Embrapa Florestas (CNPF) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
18/02/2016 |
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Data da última atualização: |
08/03/2016 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
SILVA, S. A. C. G. da; SILVA, S. S. L.; SOUZA, F. H. D. de; CASTRO, A. C. R. de; ROSA, R. C. T.; LOGES, V. |
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Afiliação: |
Stella Áurea Cristiane Gomes da Silva, UFRPE; Simone Santos Lira Silva, UFRPE; FRANCISCO HUMBERTO DUBBERN DE SOUZA, CPPSE; ANA CECILIA RIBEIRO DE CASTRO, CNPAT; Regina Ceres Torres Rosa, IPA; Vivian Loges, UFRPE. |
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Título: |
Axonopus parodii and Paspalum spp. Ornamental Quality without Mowing |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: INTERNATIONAL EUCARPIA SYMPOSIUM, 25., 2015, Wageningen. Proceedings... Wageningen: Eucarpia, 2015. |
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Idioma: |
Português |
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Palavras-Chave: |
Axonopus parodii; Ornamental Quality; Paspalum spp. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 00644nam a2200193 a 4500
001 2037504
005 2016-03-08
008 2015 bl uuuu u00u1 u #d
100 1 $aSILVA, S. A. C. G. da
245 $aAxonopus parodii and Paspalum spp. Ornamental Quality without Mowing$h[electronic resource]
260 $aIn: INTERNATIONAL EUCARPIA SYMPOSIUM, 25., 2015, Wageningen. Proceedings... Wageningen: Eucarpia$c2015
653 $aAxonopus parodii
653 $aOrnamental Quality
653 $aPaspalum spp
700 1 $aSILVA, S. S. L.
700 1 $aSOUZA, F. H. D. de
700 1 $aCASTRO, A. C. R. de
700 1 $aROSA, R. C. T.
700 1 $aLOGES, V.
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Embrapa Pecuária Sudeste (CPPSE) |
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