The method 1 3, wherein {HEAD ~ the pyrolysis} is performed at {TAIL ~ a temperature} between 300 and 600° C. and with an air factor between 0.7 and 0.98 
is performed at
The method 1 3 , wherein { HEAD ~ the pyrolysis } is performed at { TAIL ~ a temperature } between 300 and 600 ° C. and with an air factor between 0.7 and 0.98
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH