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. 2022 Apr 2;7(14):11618–11630. doi: 10.1021/acsomega.1c06314

Table 3. Elemental and Petrographic Characteristics of the Bulk Coals.

parameters Antioquia Cundinamarca Patia Valle
carbon (%) 56.5 66.1 47.6 52.2
hydrogen (%) 4.9 4.8 4.0 3.9
nitrogen (%) 1.4 1.6 1.3 1.1
sulfur (%) 0.9 1.1 1.3 2.5
gross dry higher heating value (J/g) 25,333 29,945 24,532 21,948
dry ash-free higher heating value (J/g) 28,139 34,138 31,098 32,630