| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Algodão. Para informações adicionais entre em contato com cnpa.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Algodão. |
|
Data corrente: |
04/02/2022 |
|
Data da última atualização: |
10/02/2023 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
SILVA, J. E. da; CALIXTO, G. Q.; MEDEIROS, R. L. B. de A.; MELO, M. A. de F.; MELO, D. M. de A.; CARVALHO, L. P. de; BRAGA, R. M. |
|
Afiliação: |
JANDUIR EGITO DA SILVA, INSTITUTO FEDERAL DO RIO GRANDE DO NORTE; GUILHERME QUINTELA CALIXTO, UNIVERSIDADE FEDERAL DO RIO GRANDE DO NORTE; RODOLFO LUIZ BEZERRA DE ARAÚJO MEDEIROS, UNIVERSIDADE FEDERAL DO RIO GRANDE DO NORTE; MARCUS ANTÔNIO DE FREITAS MELO, UNIVERSIDADE FEDERAL DO RIO GRANDE DO NORTE; DULCE MARIA DE ARAÚJO MELO, UNIVERSIDADE FEDERAL DO RIO GRANDE DO NORTE; LUIZ PAULO DE CARVALHO, CNPA; RENATA MARTINS BRAGA, UNIVERSIDADE FEDERAL DO RIO GRANDE DO NORTE. |
|
Título: |
Colored cotton wastes valuation through thermal and catalytic reforming of pyrolysis vapors (Py-GC/MS). |
|
Ano de publicação: |
2021 |
|
Fonte/Imprenta: |
Scientific Reports, v. 11, 16087, p. 1-10, 2021. |
|
Páginas: |
10 p. |
|
ISSN: |
2045-2322 |
|
DOI: |
10.1038/s41598-021-95043-1 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Brazil is a major producer of cotton, accounting for approximately 11% of world production with 64,519.67 thousand tons, behind only countries such as the United States, China and India. The cultivation of colored fber cotton has stood out in recent years due to the sustainability of the production process of the fabric that does not require dyeing, reducing water consumption, cost, and treatment steps of the generated efuents. The fabric made with naturally colored fbers, in addition to contributing to the environment, has been shown to be an alternative for people who are allergic to the dyes used in the coloring of white cotton fabrics. In addition, the elimination of the dyeing process can save up to one half of the cost of preparing textiles and also saves on disposal costs for toxic dye waste The naturally colored cotton cultivars of Brazil have been developed by EMBRAPA (Empresa Brasileira de Pesquisa Agropecuária), vary between green, red and light brown colors and are called by Brazil of seeds (BRS) as BRS-Verde, BRS-Rubi, BRS-Topázio and BRS-Jade, and are low-cost produced consistently in semi-arid regions in northeast Brazil. Te Brazilian agricultural production of this type of cotton generates tons of underutilized waste annually, approximately 2 times greater than the production of fibers. These residues could be used for energy generation, but their main destination is direct landfll. However, this practice demands a high amount of energy and, in some cases, degrades the soil structure. The use of cultural residues from naturally colored cotton becomes interesting for the generation of distributed energy or chemical products, considering that diferent cultivars are being developed and that the parts (stalks and shell) have similar energy potentials, according to a reported study by Silva et al. Energy could be generated with agricultural waste from colored cotton (17 GJ ton-1), and a way to take advantage of this energy potential is through the pyrolysis process, especially catalytic fash pyrolysis for the production of biofuels and/or bioproducts of greater added-value. Catalytic fash pyrolysis has been successfully used to deoxygenate bio-oil and improve its energy properties, in addition to increasing the yield of aromatic compounds, such as benzene, toluene, ethylbenzene and xylene (BTEX), which are high-valued compounds obtained mainly from the oil industry. The use of zeolites ZSM-5 and HZSM-5 in the catalytic fash pyrolysis process has been consolidating, with emphasis on HZSM-5, which has shown good efciency in the production of deoxygenated hydrocarbons. The high specifc area and acidity of these catalysts are indispensable to promote the deoxygenation reactions of the pyrolysis products leading to renewable chemicals of industrial interest. Hu et al. studied the best pore size for deoxygenation of biomass pyrolysis products, showing the HZSM-5 efectivity in deoxygenating the products. Liu et al. also showed the efciency in promoting monocyclic aromatics when using HZSM-5 and modifed HZSM-5 catalysts. Barbosa et al. conformed the high deoxygenation performance of a low-cost synthesized HZSM-5 at the catalytic pyrolysis of pineapple crown leaves, with high production of BTEX compounds. Therefore, the objective of this work is to evaluate the production of renewable aromatic compounds through the fash pyrolysis of naturally colored cotton waste through thermal and catalytic cracking of pyrolysis vapors, using ZSM-5 and HZSM-5 at 300 and 500 °C, and also to evaluate the activity of these catalysts. The valorization of naturally colored cotton wastes is presented in this study as an alternative for the production of energy, biofuels and value-added bioproducts. In this study it is presented the energetic potential of the biomass, fash pyrolysis and its upgrading through two routes: thermic and catalytic reforming. MenosBrazil is a major producer of cotton, accounting for approximately 11% of world production with 64,519.67 thousand tons, behind only countries such as the United States, China and India. The cultivation of colored fber cotton has stood out in recent years due to the sustainability of the production process of the fabric that does not require dyeing, reducing water consumption, cost, and treatment steps of the generated efuents. The fabric made with naturally colored fbers, in addition to contributing to the environment, has been shown to be an alternative for people who are allergic to the dyes used in the coloring of white cotton fabrics. In addition, the elimination of the dyeing process can save up to one half of the cost of preparing textiles and also saves on disposal costs for toxic dye waste The naturally colored cotton cultivars of Brazil have been developed by EMBRAPA (Empresa Brasileira de Pesquisa Agropecuária), vary between green, red and light brown colors and are called by Brazil of seeds (BRS) as BRS-Verde, BRS-Rubi, BRS-Topázio and BRS-Jade, and are low-cost produced consistently in semi-arid regions in northeast Brazil. Te Brazilian agricultural production of this type of cotton generates tons of underutilized waste annually, approximately 2 times greater than the production of fibers. These residues could be used for energy generation, but their main destination is direct landfll. However, this practice demands a high amount of energy and, in some cases, de... Mostrar Tudo |
|
Palavras-Chave: |
BRS Jade; BRS Rubi; BRS Topázio; BRS Verde. |
|
Thesagro: |
Algodão. |
|
Thesaurus Nal: |
Biofuels; Cotton; Natural fibers. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 04816naa a2200325 a 4500
001 2139692
005 2023-02-10
008 2021 bl uuuu u00u1 u #d
022 $a2045-2322
024 7 $a10.1038/s41598-021-95043-1$2DOI
100 1 $aSILVA, J. E. da
245 $aColored cotton wastes valuation through thermal and catalytic reforming of pyrolysis vapors (Py-GC/MS).$h[electronic resource]
260 $c2021
300 $a10 p.
520 $aBrazil is a major producer of cotton, accounting for approximately 11% of world production with 64,519.67 thousand tons, behind only countries such as the United States, China and India. The cultivation of colored fber cotton has stood out in recent years due to the sustainability of the production process of the fabric that does not require dyeing, reducing water consumption, cost, and treatment steps of the generated efuents. The fabric made with naturally colored fbers, in addition to contributing to the environment, has been shown to be an alternative for people who are allergic to the dyes used in the coloring of white cotton fabrics. In addition, the elimination of the dyeing process can save up to one half of the cost of preparing textiles and also saves on disposal costs for toxic dye waste The naturally colored cotton cultivars of Brazil have been developed by EMBRAPA (Empresa Brasileira de Pesquisa Agropecuária), vary between green, red and light brown colors and are called by Brazil of seeds (BRS) as BRS-Verde, BRS-Rubi, BRS-Topázio and BRS-Jade, and are low-cost produced consistently in semi-arid regions in northeast Brazil. Te Brazilian agricultural production of this type of cotton generates tons of underutilized waste annually, approximately 2 times greater than the production of fibers. These residues could be used for energy generation, but their main destination is direct landfll. However, this practice demands a high amount of energy and, in some cases, degrades the soil structure. The use of cultural residues from naturally colored cotton becomes interesting for the generation of distributed energy or chemical products, considering that diferent cultivars are being developed and that the parts (stalks and shell) have similar energy potentials, according to a reported study by Silva et al. Energy could be generated with agricultural waste from colored cotton (17 GJ ton-1), and a way to take advantage of this energy potential is through the pyrolysis process, especially catalytic fash pyrolysis for the production of biofuels and/or bioproducts of greater added-value. Catalytic fash pyrolysis has been successfully used to deoxygenate bio-oil and improve its energy properties, in addition to increasing the yield of aromatic compounds, such as benzene, toluene, ethylbenzene and xylene (BTEX), which are high-valued compounds obtained mainly from the oil industry. The use of zeolites ZSM-5 and HZSM-5 in the catalytic fash pyrolysis process has been consolidating, with emphasis on HZSM-5, which has shown good efciency in the production of deoxygenated hydrocarbons. The high specifc area and acidity of these catalysts are indispensable to promote the deoxygenation reactions of the pyrolysis products leading to renewable chemicals of industrial interest. Hu et al. studied the best pore size for deoxygenation of biomass pyrolysis products, showing the HZSM-5 efectivity in deoxygenating the products. Liu et al. also showed the efciency in promoting monocyclic aromatics when using HZSM-5 and modifed HZSM-5 catalysts. Barbosa et al. conformed the high deoxygenation performance of a low-cost synthesized HZSM-5 at the catalytic pyrolysis of pineapple crown leaves, with high production of BTEX compounds. Therefore, the objective of this work is to evaluate the production of renewable aromatic compounds through the fash pyrolysis of naturally colored cotton waste through thermal and catalytic cracking of pyrolysis vapors, using ZSM-5 and HZSM-5 at 300 and 500 °C, and also to evaluate the activity of these catalysts. The valorization of naturally colored cotton wastes is presented in this study as an alternative for the production of energy, biofuels and value-added bioproducts. In this study it is presented the energetic potential of the biomass, fash pyrolysis and its upgrading through two routes: thermic and catalytic reforming.
650 $aBiofuels
650 $aCotton
650 $aNatural fibers
650 $aAlgodão
653 $aBRS Jade
653 $aBRS Rubi
653 $aBRS Topázio
653 $aBRS Verde
700 1 $aCALIXTO, G. Q.
700 1 $aMEDEIROS, R. L. B. de A.
700 1 $aMELO, M. A. de F.
700 1 $aMELO, D. M. de A.
700 1 $aCARVALHO, L. P. de
700 1 $aBRAGA, R. M.
773 $tScientific Reports$gv. 11, 16087, p. 1-10, 2021.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Algodão (CNPA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Agrobiologia. |
|
Data corrente: |
13/05/2005 |
|
Data da última atualização: |
13/05/2005 |
|
Autoria: |
DÖBEREINER, Jürgen; DUTRA, I. dos S.; ROSA, I. V. |
|
Título: |
A etiologia da "cara inchada", uma periodontite epizoótica dos bovinos. |
|
Ano de publicação: |
2004 |
|
Fonte/Imprenta: |
Pesquisa Veterinária Brasileira, Rio de Janeiro, v. 24, n.1, p. 50-56, jan./mar. 2004. |
|
Idioma: |
Português |
|
Notas: |
The etiology of "cara inchada', a bovine epizootic periodontitis in Brazil. |
|
Conteúdo: |
A condesend version in Portuguese of an extensive review on " cara inchada" - periodontitis of cattle, published in English, is presented with some additional information. This disease was responsible for severe losses of young cattle especially in the 1970's and 1980's in central Brasil. Due to the progessive periodontitis and the loss of teeth, the animals cannot eat properly, loose condition and may die. This was believed to be due to mineral deficiency or imbalance. However, field and laboratory observations and experiments over 30 years showed that it is a multifactorial infectious disease which can be defined as Bovine Epizootic. It was concluded that there are three main factors required for its development; (1) Cattle affected are at the age when premolar and molar teeth erupt; (2) bacteria of the Bacteroides group are present in the subgingival spaces; (3) the ingestion with the forage of subinibitory concentrations of antibiotics, mainly streptomycin, produced by large increase in the number of actinomycetes found soil from pastures sown after recently cleared forest; this leads to an increased adherence of Bacteroides spp to the gingival epithelium and to the progressive destruction of the periodontal tissues. Nowadays, the disease has practically disappeared, because the disturbed soil microflora has reached the new equilibrium, and the occupation of virgin land for cattle rasing has almost ceased. New outberaks may occur with former problem-pastures when these are freshly cultivated as this again leads to a disequilibrium of the soil microflora and to increase antibiotic production. Other antibiotic such as spriramycin and virginiamycin, dministrered orally or added to a mineral supplement, can control the disease.
Uma versão condensada em português de um artigo de revisão sobre a periodontite da "cara inchada" dos bovinos, publicada em inglês, está apresentada com algumas informações adicionais. A doença foi responsável por grandes perdas de bovinos jovens, principalmente nas décadas de 1970 e 1980 no Brazil Central. Em face da periodontite progressiva e a perdas de dentes, os animais não podem se alimentar convenientemente, tornam-se emaciados podem morrer. A doença foi tida como uma deficiência ou desequilíbrio mineral. Mas as pesquisas de campo e de Laboratório, realizadas durante 30 anos, mostraram que trata-se de doença infecciosa multifatorial a ser definida como Periodontite Epizoótica bovina. Chegou-se à conclusão que os fatores principais para o seu desenvolvimento são: 1 a idade dos bovinos na face de erupção dos dentes premolares e molares; 2a presença de bactérias do grupo Bacteroides spp nos espaços subgengivais; e 3 a ingestão com a forragem de concentrações subinibitórias de antibióticos, sobretudo e estreptomicina, produzidos por actinomicetos cujo número é aumentado em solos virgens recén-cultivados na formação de pastagens após a derrubada da mata ou da vegetação de Cerrado; isto leva a um aumento da aderência dos bacteróides ao epitélio gengival e á destruição dos tecidos peridentários. Hoje em dia, a doença perdeu a sua importância e praticamente desapareceu, porque a microbiota do solo entrou novamente em equilíbrio e a abertura de grandes áreas virgens para a pecuária cessou. Porém, novos surtos podem ocorrer em áreas anteriormente positiva para a doença quando, na reforma de pastagens ou capineiras, houver um novo desequilíbrio da microbiota solo. Outros antibióticos, como a espiramicina e virginiamicina, administrados por via ora ou adicional a misturas minerais, podem controlar a periodontite. MenosA condesend version in Portuguese of an extensive review on " cara inchada" - periodontitis of cattle, published in English, is presented with some additional information. This disease was responsible for severe losses of young cattle especially in the 1970's and 1980's in central Brasil. Due to the progessive periodontitis and the loss of teeth, the animals cannot eat properly, loose condition and may die. This was believed to be due to mineral deficiency or imbalance. However, field and laboratory observations and experiments over 30 years showed that it is a multifactorial infectious disease which can be defined as Bovine Epizootic. It was concluded that there are three main factors required for its development; (1) Cattle affected are at the age when premolar and molar teeth erupt; (2) bacteria of the Bacteroides group are present in the subgingival spaces; (3) the ingestion with the forage of subinibitory concentrations of antibiotics, mainly streptomycin, produced by large increase in the number of actinomycetes found soil from pastures sown after recently cleared forest; this leads to an increased adherence of Bacteroides spp to the gingival epithelium and to the progressive destruction of the periodontal tissues. Nowadays, the disease has practically disappeared, because the disturbed soil microflora has reached the new equilibrium, and the occupation of virgin land for cattle rasing has almost ceased. New outberaks may occur with former problem-pastures when thes... Mostrar Tudo |
|
Palavras-Chave: |
Bovinae; Bovines; Periodontite. |
|
Thesagro: |
Bovino; Cara Inchada; Doença Animal; Gado. |
|
Thesaurus NAL: |
animal diseases; cattle; periodontitis. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 04466naa a2200277 a 4500
001 1628166
005 2005-05-13
008 2004 bl --- 0-- u #d
100 1 $aDÖBEREINER, Jürgen
245 $aA etiologia da "cara inchada", uma periodontite epizoótica dos bovinos.
260 $c2004
500 $aThe etiology of "cara inchada', a bovine epizootic periodontitis in Brazil.
520 $aA condesend version in Portuguese of an extensive review on " cara inchada" - periodontitis of cattle, published in English, is presented with some additional information. This disease was responsible for severe losses of young cattle especially in the 1970's and 1980's in central Brasil. Due to the progessive periodontitis and the loss of teeth, the animals cannot eat properly, loose condition and may die. This was believed to be due to mineral deficiency or imbalance. However, field and laboratory observations and experiments over 30 years showed that it is a multifactorial infectious disease which can be defined as Bovine Epizootic. It was concluded that there are three main factors required for its development; (1) Cattle affected are at the age when premolar and molar teeth erupt; (2) bacteria of the Bacteroides group are present in the subgingival spaces; (3) the ingestion with the forage of subinibitory concentrations of antibiotics, mainly streptomycin, produced by large increase in the number of actinomycetes found soil from pastures sown after recently cleared forest; this leads to an increased adherence of Bacteroides spp to the gingival epithelium and to the progressive destruction of the periodontal tissues. Nowadays, the disease has practically disappeared, because the disturbed soil microflora has reached the new equilibrium, and the occupation of virgin land for cattle rasing has almost ceased. New outberaks may occur with former problem-pastures when these are freshly cultivated as this again leads to a disequilibrium of the soil microflora and to increase antibiotic production. Other antibiotic such as spriramycin and virginiamycin, dministrered orally or added to a mineral supplement, can control the disease. Uma versão condensada em português de um artigo de revisão sobre a periodontite da "cara inchada" dos bovinos, publicada em inglês, está apresentada com algumas informações adicionais. A doença foi responsável por grandes perdas de bovinos jovens, principalmente nas décadas de 1970 e 1980 no Brazil Central. Em face da periodontite progressiva e a perdas de dentes, os animais não podem se alimentar convenientemente, tornam-se emaciados podem morrer. A doença foi tida como uma deficiência ou desequilíbrio mineral. Mas as pesquisas de campo e de Laboratório, realizadas durante 30 anos, mostraram que trata-se de doença infecciosa multifatorial a ser definida como Periodontite Epizoótica bovina. Chegou-se à conclusão que os fatores principais para o seu desenvolvimento são: 1 a idade dos bovinos na face de erupção dos dentes premolares e molares; 2a presença de bactérias do grupo Bacteroides spp nos espaços subgengivais; e 3 a ingestão com a forragem de concentrações subinibitórias de antibióticos, sobretudo e estreptomicina, produzidos por actinomicetos cujo número é aumentado em solos virgens recén-cultivados na formação de pastagens após a derrubada da mata ou da vegetação de Cerrado; isto leva a um aumento da aderência dos bacteróides ao epitélio gengival e á destruição dos tecidos peridentários. Hoje em dia, a doença perdeu a sua importância e praticamente desapareceu, porque a microbiota do solo entrou novamente em equilíbrio e a abertura de grandes áreas virgens para a pecuária cessou. Porém, novos surtos podem ocorrer em áreas anteriormente positiva para a doença quando, na reforma de pastagens ou capineiras, houver um novo desequilíbrio da microbiota solo. Outros antibióticos, como a espiramicina e virginiamicina, administrados por via ora ou adicional a misturas minerais, podem controlar a periodontite.
650 $aanimal diseases
650 $acattle
650 $aperiodontitis
650 $aBovino
650 $aCara Inchada
650 $aDoença Animal
650 $aGado
653 $aBovinae
653 $aBovines
653 $aPeriodontite
700 1 $aDUTRA, I. dos S.
700 1 $aROSA, I. V.
773 $tPesquisa Veterinária Brasileira, Rio de Janeiro$gv. 24, n.1, p. 50-56, jan./mar. 2004.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Agrobiologia (CNPAB) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
