Instrument : Labsysä TG evo
Sample : 139.7 mg of coal.
Crucible : platinum 500µl.
The furnace is first flushed with a high flow of nitrogen; then the following program is used:
– Heating up to 110°C at 5 Kmin-1, under a small flow of N2, then holding at 110°C to constant mass.
– Heating up to 950°C at 10 Kmin-1, under N2, then swiching to O2 and holding at 950°C to constant mass.
The different mass losses make it possible to determine the following proportions :
– moisture : 3.96 %
– volatiles : 40.20 %
– fixed carbon : 40.76 %
– ashes : 15.08 %
Notice : the ash content corresponds to the remaining fraction at 950°C after reaction under oxygen.