Numerical investigation and optimization on laminar burning velocity of ammonia-based fuels based on GRI3.0 mechanism

Laminar Burning Velocity Measurement of CH4/NH3/H2–Air Premixed Flames under Engine Relevant Conditions

“…CH 4 /H 2 /10% NH 3 –air blend’s LBV is higher at 0.1 MPa than CH 4 flames because of the higher presence of O, OH, and H radicals. Experimentally generated data are uniformly consistent with the LBV predictions by Okafor model and Li model for all mixture conditions, whereas Shrestha model and GRI Mech 3.02022 overpredict the LBV by ∼22% (ϕ = 1.3) and ∼17% (ϕ = 0.7), respectively. The experimental values affirm more temperature dependency for lean conditions.…”

“…Numerical Simulations. Four comprehensive kinetic models, viz., Li et al, 41 Okafor et al, 36 improved GRI 3.0 mechanism, 39 and Shrestha et al 34 (reported in Table 1), are contemplated for comparison purposes with the current experimental results. Chemkin software 47 simulates 1D adiabatic, premixed flames for user-specified unburned temperatures and pressures.…”

“…37 Jin et al 38 investigated the NH 3 effect on CH 4 −air flames numerically at steep pressures of 1−20 atm and 298 K. With a rise in pressure, a decrease in LBV and adiabatic flame temperature was observed along with a reduction in the peaks for H, NH 2 , NO, NO 2 , and HCN radicals. Bao et al 39 numerically investigated and optimized a reduced GRI 3.0 mechanism for NH 3 fuel chemistry. 32 elementary reactions based on NH 3 chemistry were added to the existing mechanism, and 7 reactions were modified as addition of H 2 in NH 3 enhanced the LBV exponentially.…”

Perspective and analysis of ammonia-based distributed energy system (DES) for achieving low carbon community in China

“…Moreover, as a hydrogen carrier, which is also a clean energy source, the combination of ammonia with hydrogen improves the heating value and the combustion rate of pure ammonia, ensuring a stable energy supply for DES. Studies on the combustion characteristics of ammonia-hydrogen and ammonia-methane have been widely reported ( Bao et al., 2022 ; Otomo et al., 2018 ; Tang et al., 2021 ; Valera-Medina et al., 2017a ), with their main properties available in the reference ( Chai et al., 2021 ).…”

A novel CuBi2O4/polyaniline composite as an efficient photocatalyst for ammonia degradation

“…Ammonia (NH 3 or NH 4 + ) can have significant effect on both the environment and human health and negatively affect biodiversity. The main release source of ammonia in the environment is from agriculture activities such as man-made fertilizer application, fossil fuel, manure, and slurry management ( Tang et al., 2021 ; Bao et al., 2022 ; Chai et al. 2021a , 2021b ).…”