Predictions of a mathematical model are compared with NO data for pulverised -coal flames. The mathematical model comprises a two-dimensional parent code for the aerodynamics and combustion to which a fuel-NO post processor is appended. The data, which include local concentrations of NO, HCN and NH3, were obtained in a large scale laboratory cylindrical combustor for a conventional burner and for a low NO burner. Four models for the Volatiles-derived NO and two models for the char-derived NO have been tested.