MILD combustion of partially catalyzed NH3 and NH3/N2 in a novel burner

Abstract

Ammonia (NH) is now attracting attention in the energy field due to its hydrogen-containing and carbon-free, vast infrastructure, safe utilization and longstanding storage. Nevertheless, NH combustion is usually associated with low flame instability and high NO emissions due to its low laminar flame speed and nitrogen content. The partial catalytic cracking of NH offers an economical strategy to improve combustion stability. However, the significant limitations of this strategy include high NO emissions. Therefore, the MILD combustion of partial catalytic cracking of NH is an excellent method to address the challenge. In this work, a novel trimetallic catalyst (Fe, Co, and Ni) was developed, and the MILD combustion of partially catalyzed NH and NH/N was performed in a novel burner. The effects of the NH conversion, N addition and NH power on pollutant emissions were experimental investigated. Numerical simulations were carried out to analyze the characteristics in the MILD combustion of partially catalyzed NH and NH/N observed in the experiments.