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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Pretreatment Effect on the Thermal Degradation of a Feedstock with Low Hemicellulose Content: Brazilian Ginseng

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Author(s):
Cabeza, Alvaro ; Santos, Diego T. ; Meireles, M. Angela A. ; Sobron, Francisco ; Cocero Alonso, Maria Jose ; Garcia-Serna, Juan
Total Authors: 6
Document type: Journal article
Source: ENERGY & FUELS; v. 31, n. 7, p. 7123-7131, JUL 2017.
Web of Science Citations: 0
Abstract

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)

FAPESP's process: 12/19304-7 - Brazilian ginseng biorefinery: simulation and multi-objective optimization
Grantee:Diego Tresinari dos Santos
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 10/16485-5 - Technical and economic evaluation of the integration of sustainable processes for a better use of brazilian ginseng (Pfaffia glomerata)
Grantee:Diego Tresinari dos Santos
Support Opportunities: Scholarships in Brazil - Post-Doctoral