01828nam a2200229 a 450000100080000000500110000800800410001910000220006024500850008226002180016730000140038552010480039965000120144765000140145965000140147365300140148770000140150170000160151570000250153170000190155670000230157519030132014-06-27       2011    bl uuuu     u00u1 u    #d1 aALHO, C. F. B. V.  aPyrolysis final temperature effects on biochar stability.h[electronic resource]  aIn: ENCONTRO BRASILEIRO DE SUBSTÂNCIAS HÚMICAS, 9., 2011, Aracaju. Matéria orgânica natural e substâncias húmicas: dos avanços das técnicas de caracterização ao seqüestro de C. [Aracaju: UFS: IHSSc2011  c1 CD-ROM.  aPyrolysis technology can be used for producing biochar and bio-oil simultaneously, as an effective and sustainable mean to produce renewable bioenergy and a carbon rich soil amendment that can be used for carbon sequestration and agronomic benefits. However, pyrolysis products yields and biochar stability are strongly affected by the feedstock and pyrolysis variables, especially the final temperature. This study was carried out to evaluate the effect of pyrolysis final temperature on biochar stability after thermochemical oxidation. For this experiment, two species of hardwood and two species of softwood with particle size between 0.5 and 2.0 mm were pyrolized at five different final temperatures (350, 400, 450, 500 and 550°C) for 60 min at an muffle furnace with limited supply of O2. Thermochemical oxidation was performed for the solid products (biochar). As pyrolysis final temperature increased, biochar stability increased as well, indicating that these materials would be more resistant to degradation when applied into soil.  aBiochar  aOxidation  aPyrolysis  aStability1 aCROSS, A.1 aSOHI, S. P.1 aMAIA, C. M. B. de F.1 aNOVOTNY, E. H.1 aLELIS, R. C. da C.