CHARCOAL PRODUCTION FROM FOREST RESIDUES

摘要

The carbonization behaviors of spruce wood and its forest residue at different conditions were studiedrnin this work. A standard proximateanalysis procedure delivered the lowest charcoaland fixed-carbon yields. Samplernsizeconsiderably affected the charcoal and fixed-carbonyields. In this work, for spruce wood andits forest residue, anrnincrease in sample size from10 mg to 130 mg increased the charcoal yield at950℃ from 18.60 to 21.49 wt% andrn26.78 to28.12 wt%, respectively. For all TGAmeasurements, both charcoal and fixed-carbonyields are significantlyrnenhanced when a closedcrucible is employed, in comparison to an opencrucible. The highest charcoal and fixedcarbonyieldsrnobtained in this work were offered by ahigh pressure TGA at 8 bar. These findings showthe influentialrnrole of secondary char formingreactions. Conditions that improve or prolongcontact of pyrolytic vapors with therncharcoalmatrix enhance the fixed-carbon yield.