Work

Exploring the impact of stochastic transient phases on the NO emissions from NH3/H2 mixture rich combustion in gas turbines

Year: 2024

Type: article

Abstract: To reduce climate impact, switching to carbon-free electrofuels is an interesting option to reduce greenhouse gas emissions from electricity generation . The emission of other pollutants than CO 2 , such as nitrogen oxides (NO x ), however, remains a concern. This research focuses on investigating the impact of transient phases, such as start-up and load change, on the NO x emissions expected from the rich combustion of mixtures of hydrogen and ammonia in gas turbines . Stochastic processes account for the inherent variability and uncertainty on the transient trajectories. The trajectories are simulated using a one-dimensional premixed flame model built in Cantera to compute the levels of pollutant formations , among others. The results indicate significant variations in the equivalence ratio, leading to high NO x emission peaks. The study concludes that the impact of the uncertainties related to the transient trajectories on the NO x emissions is low compared to the overall variations of the equivalence ratio, although they can accentuate observed peaks.

Source: Results in Engineering

DOI: 10.1016/j.rineng.2024.102798