Diluted Air Combustion and NOx Emission in a HiTAC Furnace

Abstract

CFD modeling of NOx emission via N₂O-intermediate mechanism was developed to predict the NOx formation in an experimental furnace equipped with high temperature air combustion (HiTAC) system. The good agreement between the predicted and measured results illustrates the superiority of using a N₂O-intermediate model in prediction of NOx emission during low peak temperature, which happens in HiTAC systems. Moreover, the CFD and measured results show that the flame volume as well as NOx emission significantly depends on temperature and oxygen concentration. Lower NOx emission was experimentally and numerically obtained at lower input oxygen concentration conditions.

Acknowledgments

The authors wish to express their thanks to Mehdi Khoshhal for his help in the experimental part of this work.

Notes

The units are K, cal, mol, cm³, and s.