Influence of impregnation method on metal retention of CCB-treated wood in slow pyrolysis process

► CCB-treated wood using dipping method contains more metals (Cu, Cr, B) than CCB-treated wood using pressure method. ► Cu, Cr, B contained in CCB-treated wood catalyze pyrolysis reaction of wood. ► This phenomenon is more pronounced for dipping CCB-treated wood than for pressure treated wood. ► The charcoal obtained by pyrolysis of CCB-treated wood using both methods is higher than the value obtained from untreated wood. ► More than 45% of Cu, Cr and B are captured in charcoal of CCB-treated wood.