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