POTENTIAL STABILITY OF BIOCHAR PRODUCED THROUGH PRESSURISED SLOW PYROLYSIS: EFFECT OF BOTH OPERATING CONDITIONS AND FEEDSTOCK SOURCE

摘要

The effect of several slow-pyrolysis operating parameters (peak temperature, pressure and particle size) on the potential stability of produced biochar was investigated for two different biomass sources: vine-shoots and two-phase olive mill waste (TPOMW). Results highlighted that the effect of the above-mentioned parameters strongly depend on the feedstock source: for vine-shoots, particle size was clearly the most important factor affecting the potential stability of biochar, whereas pressure did not seem to play any significant role; however, for TPOMW, the aromatic carbon content was maximized when pyrolysis was conducted under a moderate pressure (1.0 MPa) at the highest peak temperature (600 °C).