2019/06/13 by Pengfei Li, Kai Wang, Wenhao Li +3
Chemical Engineering · Earth and Planetary Sciences · Materials Science · #Advanced Combustion Engine Technologies #Atmospheric chemistry and aerosols #Catalytic Processes in Materials Science
paper · doi:10.1021/acs.energyfuels.9b01117
openalex publication_date 2019/06/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
New experimental results of the characteristics of fuel-NO x formation at high CO 2 concentrations are obtained in a jet-stirred reactor. NH 3 is selected as the source of N. The effects of the CO 2 concentration (0–97.4%), reaction temperature (873–1323 K), equivalence ratio (0.56–1.61), initial NH 3 concentration (10–1000 ppm), and residence time (0.01–10 s) on the production and destruction of fuel-NO x are experimentally and numerically investigated in both N 2 and CO 2 atmospheres. Under fuel-lean conditions, the NO emissions decrease with increasing residence time, equivalence ratio, or CO 2 concentration. Under stoichiometric conditions, the NO production from the N 2 and CO 2 atmospheres are nearly the same, irrespective of the temperature. Under fuel-rich conditions, the NO-reburning chemistry can reduce the majority of the NO emission. Under fuel-rich conditions and at temperatures above 1200 K, the NO production is lower in the N 2 atmosphere because the NO-reburning is stronger than that in the CO 2 atmosphere. Moreover, the critical temperature for the peak N 2 O formation is obtained. Although fuel oxidation is slightly delayed at high CO 2 concentrations, the N 2 O formation is essentially insensitive to the CO 2 concentration. Furthermore, the numerical results are consistent with the vast majority of experiments, and important reactions are identified for future development of fuel-NO x formation at high CO 2 concentrations.