02387naa a2200301 a 450000100080000000500110000800800410001902400520006010000210011224501130013326000090024652014600025565000140171565000130172965000190174265300200176165300240178165300250180565300140183065300260184465300140187070000170188470000230190170000240192470000200194870000290196877300880199721164372020-08-10       2020    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1007/s10973-019-09061-32DOI1 aMALUCELLI, L. C.  aEnergetic potential of pyrolyzed biomass from different sourcesba comparative study.h[electronic resource]  c2020  aThe use of biomass has been a recent trend as a potential feedstock for char generation with improved energetic value. In this work, agricultural residues such as sugarcane bagasse (SCB) and rice husk (RH) were submitted to slow pyrolysis and their calorifc value potential was evaluated in comparison with industrial woodchip biochar (WC) (Pyreg GmbH). The samples were characterized by thermogravimetry (TG), diferential thermal analysis (DTA), elemental analysis (CNHS) and Fourier-transform infrared spectroscopy. The chars/biochar had a high energetic profle, as indicated by the prominent exothermic peaks in DTA curves, along with the major mass losses, as demonstrated in the TG curves. The combination of fxed carbon (FC) and ash content (A) proved to be essential to produce a char with enhanced higher heating value (HHV), as observed for SCB (FC=54.6%; A=6.2%) and RH (FC=51.0%; A=38.4%). SCB and RH chars presented an improved stability refected by a C/N molar ratio higher than 90%. The low nitrogen content (SCB=0.8%; RH=0.6%) and surface area (SCB=6.0 m2 g?1; RH=11.2 m2 g?1) of the produced chars suggest that they are not indicated for agricultural applications, unless chemical activation is applied. Furthermore, the post-treatment applied for WC (biological activation) is possibly the cause for the improved physicochemical properties, particularly in terms of potential soil conditioning, at the expense of estimated calorifc value.  aPyrolysis  aBiomassa  aCasca de Arroz  aBagaço de cana  aEnergetic potential  aHigher heating value  aPirólise  aPotencial energético  aRice husk1 aCARNEITO, J.1 aVASCONCELOS, E. C.1 aMAGALHAES, W. L. E.1 aMURAKAMI, F. S.1 aCARVALHO FILHO, M. A. S.  tJournal of Thermal Analysis and Calorimetrygv. 141, n. 3, p. 1149-1155, Aug. 2020.