Detailed kinetic model for combustion of NH 3 /H 2 blends

calculations, minimizing reliance on estimated parameters. A new detailed kinetic mechanism was generated using the reaction mechanism generator (RMG). For six key pressure-dependent reactions, recently developed bath-gas mixture rules and temperature-dependent third-body efficiencies were applied to improve the treatment of composition effects. The resulting mechanism was validated against experimental laminar-burning velocities, ignition-delay times, flow-reactor species profiles, and jet-stirred-reactor data, and compared with several recent literature mechanisms. Without any empirical rate-coefficient adjustments, the model reproduces many experimental observations with good overall agreement, while remaining discrepancies highlight persistent uncertainties in nitrogen-oxide chemistry. As no parameters were tuned to reproduce specific experimental targets, we expect the model to extrapolate well to conditions where experimental data are limited.