Devolatilisation of some pulverised Eastern European lignites

The devolatilisation behaviour of two pulverised lignites from Eastern Europe was investigated particularly with respect to the kinetics of pyrolysis. Two rapid heating methods, the heated wire mesh and a Pyroprobe have been used to determine the yield of the volatiles and particularly the nitrogen containing species, HCN and CH3CN. The kinetic parameters for devolatilisation have been obtained from thermogravimetric apparatus and by wire mesh experiments. The experimental data were compared with values predicted using the theoretical model coal pyrolysis, model FG-DVC and with other studies on lignites.