Evolution of Micron-Scale Pore Structure and Connectivity of Lignite during Pyrolysis

Table 1

Coal quality indicators of lignite specimen.

Sample	Air dry moisture Mad (%)	Air dry ash Aad (%)	Air dry volatile Vad (%)	Air dry total sulfur St, ad (%)	Calorific value (MJ/kg)
Lignite	1.86	21	39.8	1.43	20.1