Validation of NO_x and NO_x Precursor Predictions in Coal Flames

Abstract

To utilize currently available CFD-based predictive methods to assess NO, production in industrial coal flames, the confidence limits of the chosen NO, model must first be established. In this study, a simplified strategy for NO, prediction is proposed and validated using measurements of NO, and NO, precursors obtained from burning three different Canadian coals in two pilot-scale facilities. Validation results indicate that the proposed NO, model can provide reasonably good engineering estimates of NO, HCN and NH3 from the near burner region to the furnace exit in all test cases.

Keywords:

• NO
• modeling
• coal flames
• validation
• measurements