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Coal Characteristics of NEC


SL No. PROXIMATE AND ULTIMATE ANALYSIS OF NEC COAL
1 G1 GCV: Exceeding 7500 and not exceeding 7600 Kcal/Kg
  PROXIMATE ANALYSIS   ULTIMATE ANALYSIS
  Moisture% 2.2 - 2.60   Carbon% 75.5 - 76.90
  Ash% 4.90 - 5.80   Hydrogen % 5.4 - 5.5
  Volatile Matter% 41.4 - 43.00   Nitrogen % 1.3 - 1.6
  Fixed Carbon% 48.20 - 50.00   Sulphur % 2.5 - 2.8
  Caking Index 19 - 24    Oxygen % (By difference) 13.2 - 15.4
 
2 G1 GCV: Exceeding 7300 and not exceeding 7400 Kcal/Kg
  PROXIMATE ANALYSIS   ULTIMATE ANALYSIS
  Moisture% 2.2 - 2.4   Carbon% 71.2 - 77.90
  Ash% 5.00 - 11.30   Hydrogen % 4.9 - 5.2
  Volatile Matter% 38.00 - 39.00   Nitrogen % 1.6 - 1.8
  Fixed Carbon% 48.30 - 53.80   Sulphur % 3.2 - 4.6
  Caking Index 18 - 22    Oxygen % (By difference) 10.5 - 19.0
 
3 G2 GCV: Exceeding 6700 and not exceeding 7000 Kcal/Kg
  PROXIMATE ANALYSIS   ULTIMATE ANALYSIS
  Moisture% 2.3 - 2.5   Carbon% 68.30 - 71.3
  Ash% 11.3 - 13.50   Hydrogen % 4.90 - 4.91
  Volatile Matter% 38.00 - 40.10   Nitrogen % 1.50 - 1.80
  Fixed Carbon% 43.90 - 48.40   Sulphur % 2.3 - 5.7
  Caking Index 17 - 20    Oxygen % (By difference) 16.3 - 23.0
 
4 G4 GCV: Exceeding 6100 and not exceeding 6400 Kcal/Kg
  PROXIMATE ANALYSIS   ULTIMATE ANALYSIS
  Moisture% 2.57 - 2.7   Carbon% 63.6 - 64.1
  Ash% 15.80 - 18.60   Hydrogen % 4.53 - 4.54
  Volatile Matter% 36.70 - 37.20   Nitrogen % 1.5 - 1.70
  Fixed Carbon% 41.60 - 42.30   Sulphur % 5.40 - 5.60
  Caking Index 16 - 19    Oxygen % (By difference) 24.00 - 25.00