Table 1.
NOx emission factors of wood pellet, LNG, coal and bunker-C fuel

Fuel type NOx (ppm) O2 (%) NOx emission factor (g/kg) Based on LNG
LNG 35 3 0.96 1.00
Wood pellet 67 13 1.82 1.90
Coal or bunker-C with de-NOx facility 70 3 1.98 2.06