| Texto completo | |
| Autor(es): |
Cabeza, Alvaro
;
Santos, Diego T.
;
Meireles, M. Angela A.
;
Sobron, Francisco
;
Cocero Alonso, Maria Jose
;
Garcia-Serna, Juan
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ENERGY & FUELS; v. 31, n. 7, p. 7123-7131, JUL 2017. |
| Citações Web of Science: | 0 |
| Resumo | |
Pyrolysis is a well-known process for biomass upgrading, and a great deal of works are available about it. However, they focus on conventional lignocellulosic samples, and the information about any other less common samples, while still valuable, is very difficult to find. For instance, Brazilian ginseng (Pfaffia glomerata) is a feedstock without hemicellulose and a profitable source of target compounds (like beta-ecdysone) via an extraction process, also generating an exhausted solid. However, there is not much information about this biomass in the literature. For this reason, this work deals for the first time with the effect of. different pretreatments on the thermal degradation behavior of Brazilian ginseng. To do so, thermogravimetric analysis (TGA) of the raw material and post-treated samples was done in a synthetic air atmosphere (20% oxygen). The thermograms were fitted via an autocatalytic model (deviation of 4.22%), and the calculated. kinetics were used to analyze how the pretreatment modifies the volatilization and char formation for each individual compound (cellulose and lignin) in all the samples. Additionally, structural changes were observed performing XRD and DSC, explaining why different kinetic parameters were required for each sample. Regarding XRD, a variable crystalline index that ranged from 51% to 75% was obtained. Concerning DSC, the pretreatment produced an endothermic peak between 150 and 200 degrees C. (AU) | |
| Processo FAPESP: | 12/19304-7 - Biorrefinaria do ginseng brasileiro: simulação e otimização multiobjetivo |
| Beneficiário: | Diego Tresinari dos Santos |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |
| Processo FAPESP: | 10/16485-5 - Avaliação técnica e econômica da integração de processos sustentáveis visando um melhor aproveitamento do ginseng brasileiro (Pfaffia glomerata) |
| Beneficiário: | Diego Tresinari dos Santos |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |