AN133 – Proximate analysis of a coal

AN-133

EXPERIMENTAL

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.

CONCLUSION

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.