“…Low-rank inertinites can have better burning characteristics than high-rank vitrinites. The presence of different macerals and microlithotypes has been related to the type and morphology of pyrolysis chars, chars present in burnout residues, and fly ash (Chatterjee et al, 1987;Bailey et al, 1990;Bend et al, 1992;Gentzis and Chambers, 1993;Alvarez et al, 1997;Alonso et al, 2001). Image analysis technique has been used to identify the unreactive content in the coal, which has been subsequently linked with the formation of low-reactive unfused chars (Cloke et al, 1997(Cloke et al, , 2002(Cloke et al, , 2003.…”