| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Corte. Para informações adicionais entre em contato com cnpgc.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Gado de Corte. |
|
Data corrente: |
10/08/2011 |
|
Data da última atualização: |
10/08/2011 |
|
Autoria: |
DELBEN, J. R. J.; CANDELORIO, P. D.; OLIVEIRA, F. F. DE; SPONTONI, T. A.; DELBEN, A. A. S. T.; COELHO, M. de B.; ANDRADE, L. H. C. |
|
Afiliação: |
J. R. J. Delben, UFMS; P. D. Candelorio, UFMS; F. F. de Oliveira, UFMS; T. A. Spontoni, UFMS; Angela A. S. T. Delben, UFMS; MARLENE DE BARROS COELHO, CNPGC; L. H. C. Andrade, UFMS. |
|
Título: |
Vacuum pyrolysis of Astronium urundeuva. |
|
Ano de publicação: |
2008 |
|
Fonte/Imprenta: |
Journal of Thermal Analysis and Calorimetry, v. 93, n.3, p. 915-919, 2008. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Currently, there are ecological and energy crises due to the increasing demand for industrialized products and personal comfort (thermal conditioning, alimentary needs, transport demand, etc.). The consumption of fossil energy sources (coal and oil) is significant considering depleting supplies. In underdeveloped countries, native forest territory is being lost as the original forest biomass is consumed and agricultural land borders expand. The release of pollutant carbon into the atmosphere is increasing; this carbon was previously fixed in wood, oil beds and native forest. Meanwhile, the fossil reserves will be depleted in a few decades. Due to this situation, petroleum natural gas (PNG) is beginning to be used intensely worldwide, in the past it was released into the atmosphere. The development of cheap materials for large-scale permanent fixation of carbon, while adsorbing PNG for storage and transport, is desired. There are three options for storing PNG: ? the use of appropriate solvent; its drawback is the low solubility of the methane, requiring high pressures [1] ? the inclusion of composites [2]; its disadvantage is the low storage capacity ? the adsorption in porous materials [3?8]; that is the most promising mechanism ? A lot of research is focused on the development of microporous adsorbers with a large superficial area, high packing density and good mass and heat transfer properties [9, 10]. The best choice so far is activated charcoal acting as an adsorber. Such a system can store PNG at moderate pressures (3.5 MPa), compared with the high pressures (20 MPa) required for natural gas compression [11]. Its storage capacity is in the range of 300?700 Kg m?3, with the adsorbed/adsorbent volume rate varying from 101 to 172 V/V, whereas the ideal rate is around 150 V/V [4, 5, 7, 12?17]. The pyrolysis of vegetal organics is a common process for activating carbon. The activation of carbon can occur in some environments, such as vacuum, steam, and CO2, with different results on the microporosity lacking meso- and macroporosity. The maximization of the superficial area and adsorption capacity of the activated charcoal is still under study [18?20]. In this work, the pyrolysis of the Aroeira (Astronium Urundeuva), a wood of the Middle West Brazilian Biome, is presented. The samples were characterized by differential scanning calorimetry (DSC), thermogravimetric analysis (TG), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). MenosCurrently, there are ecological and energy crises due to the increasing demand for industrialized products and personal comfort (thermal conditioning, alimentary needs, transport demand, etc.). The consumption of fossil energy sources (coal and oil) is significant considering depleting supplies. In underdeveloped countries, native forest territory is being lost as the original forest biomass is consumed and agricultural land borders expand. The release of pollutant carbon into the atmosphere is increasing; this carbon was previously fixed in wood, oil beds and native forest. Meanwhile, the fossil reserves will be depleted in a few decades. Due to this situation, petroleum natural gas (PNG) is beginning to be used intensely worldwide, in the past it was released into the atmosphere. The development of cheap materials for large-scale permanent fixation of carbon, while adsorbing PNG for storage and transport, is desired. There are three options for storing PNG: ? the use of appropriate solvent; its drawback is the low solubility of the methane, requiring high pressures [1] ? the inclusion of composites [2]; its disadvantage is the low storage capacity ? the adsorption in porous materials [3?8]; that is the most promising mechanism ? A lot of research is focused on the development of microporous adsorbers with a large superficial area, high packing density and good mass and heat transfer properties [9, 10]. The best choice so far is activated charcoal acting as an adsorber. Suc... Mostrar Tudo |
|
Palavras-Chave: |
Pirólise. |
|
Thesagro: |
Aroeira; Astronium Urundeuva; Madeira. |
|
Categoria do assunto: |
W Química e Física |
|
Marc: |
LEADER 03174naa a2200241 a 4500
001 1897692
005 2011-08-10
008 2008 bl uuuu u00u1 u #d
100 1 $aDELBEN, J. R. J.
245 $aVacuum pyrolysis of Astronium urundeuva.$h[electronic resource]
260 $c2008
520 $aCurrently, there are ecological and energy crises due to the increasing demand for industrialized products and personal comfort (thermal conditioning, alimentary needs, transport demand, etc.). The consumption of fossil energy sources (coal and oil) is significant considering depleting supplies. In underdeveloped countries, native forest territory is being lost as the original forest biomass is consumed and agricultural land borders expand. The release of pollutant carbon into the atmosphere is increasing; this carbon was previously fixed in wood, oil beds and native forest. Meanwhile, the fossil reserves will be depleted in a few decades. Due to this situation, petroleum natural gas (PNG) is beginning to be used intensely worldwide, in the past it was released into the atmosphere. The development of cheap materials for large-scale permanent fixation of carbon, while adsorbing PNG for storage and transport, is desired. There are three options for storing PNG: ? the use of appropriate solvent; its drawback is the low solubility of the methane, requiring high pressures [1] ? the inclusion of composites [2]; its disadvantage is the low storage capacity ? the adsorption in porous materials [3?8]; that is the most promising mechanism ? A lot of research is focused on the development of microporous adsorbers with a large superficial area, high packing density and good mass and heat transfer properties [9, 10]. The best choice so far is activated charcoal acting as an adsorber. Such a system can store PNG at moderate pressures (3.5 MPa), compared with the high pressures (20 MPa) required for natural gas compression [11]. Its storage capacity is in the range of 300?700 Kg m?3, with the adsorbed/adsorbent volume rate varying from 101 to 172 V/V, whereas the ideal rate is around 150 V/V [4, 5, 7, 12?17]. The pyrolysis of vegetal organics is a common process for activating carbon. The activation of carbon can occur in some environments, such as vacuum, steam, and CO2, with different results on the microporosity lacking meso- and macroporosity. The maximization of the superficial area and adsorption capacity of the activated charcoal is still under study [18?20]. In this work, the pyrolysis of the Aroeira (Astronium Urundeuva), a wood of the Middle West Brazilian Biome, is presented. The samples were characterized by differential scanning calorimetry (DSC), thermogravimetric analysis (TG), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD).
650 $aAroeira
650 $aAstronium Urundeuva
650 $aMadeira
653 $aPirólise
700 1 $aCANDELORIO, P. D.
700 1 $aOLIVEIRA, F. F. DE
700 1 $aSPONTONI, T. A.
700 1 $aDELBEN, A. A. S. T.
700 1 $aCOELHO, M. de B.
700 1 $aANDRADE, L. H. C.
773 $tJournal of Thermal Analysis and Calorimetry$gv. 93, n.3, p. 915-919, 2008.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Gado de Corte (CNPGC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Amazônia Oriental. |
|
Data corrente: |
21/02/2013 |
|
Data da última atualização: |
11/09/2013 |
|
Tipo da produção científica: |
Artigo em Anais de Congresso |
|
Autoria: |
RODRIGUES, S. M.; RAMOS, G. K. de S.; LEMOS, O. F. de; MENEZES, I. C. de; ALVES, R. M. |
|
Afiliação: |
SIMONE DE MIRANDA RODRIGUES, CPATU; GLEYCE KELLY DE SOUSA RAMOS, UFRA; ORIEL FILGUEIRA DE LEMOS, CPATU; ILMARINA CAMPOS DE MENEZES, CPATU; RAFAEL MOYSES ALVES, CPATU. |
|
Título: |
Calogênese in vitro em estaminóides de cupuaçu. |
|
Ano de publicação: |
2012 |
|
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 2., 2012, Belém, PA. Anais... Brasília, DF: Sociedade Brasileira de Recursos Genéticos, 2012. |
|
Descrição Física: |
1 CD-ROM. |
|
Idioma: |
Português |
|
Conteúdo: |
Existe dificuldade para obtenção de plantios homogêneos de cupuaçuzeiro, o que dificulta sua expansão. Portanto, a obtenção de um protocolo de clonagem e multiplicação para essa espécie torna-se interesse não apenas para os programas de melhoramento da espécie, mas também para uso em plantios comerciais. Nesse sentido, esse trabalho objetivou o estudo de estaminóides in vitro de cupuaçu, considerando-se variações no tempo de cultivo nos meios de obtenção de calos. Os explantes cultivados durante 28 dias em meio DKW e 14 dias em meio WPM apresentaram os melhores resultados para a obtenção de calos de cupuaçu. |
|
Palavras-Chave: |
Cultura de tecidos. |
|
Thesagro: |
Calogênese; Cupuaçu; Theobroma Grandiflorum. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/89303/1/231.pdf
|
|
Marc: |
LEADER 01320nam a2200217 a 4500
001 1950311
005 2013-09-11
008 2012 bl uuuu u00u1 u #d
100 1 $aRODRIGUES, S. M.
245 $aCalogênese in vitro em estaminóides de cupuaçu.
260 $aIn: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 2., 2012, Belém, PA. Anais... Brasília, DF: Sociedade Brasileira de Recursos Genéticos$c2012
300 $c1 CD-ROM.
520 $aExiste dificuldade para obtenção de plantios homogêneos de cupuaçuzeiro, o que dificulta sua expansão. Portanto, a obtenção de um protocolo de clonagem e multiplicação para essa espécie torna-se interesse não apenas para os programas de melhoramento da espécie, mas também para uso em plantios comerciais. Nesse sentido, esse trabalho objetivou o estudo de estaminóides in vitro de cupuaçu, considerando-se variações no tempo de cultivo nos meios de obtenção de calos. Os explantes cultivados durante 28 dias em meio DKW e 14 dias em meio WPM apresentaram os melhores resultados para a obtenção de calos de cupuaçu.
650 $aCalogênese
650 $aCupuaçu
650 $aTheobroma Grandiflorum
653 $aCultura de tecidos
700 1 $aRAMOS, G. K. de S.
700 1 $aLEMOS, O. F. de
700 1 $aMENEZES, I. C. de
700 1 $aALVES, R. M.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Amazônia Oriental (CPATU) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
