An Experimental and Kinetic Modeling Study of NO₂ Sensitization on the Autoignition of Ammonia.

ABSTRACT: An experimental and kinetic modeling study was performed to investigate the influence of NO₂ addition on the autoignition characteristics of NH₃/O₂/Ar mixtures. Ignition delay times were measured using a shock tube at temperatures of 1450-2200 K, pressures of 0.14 and 1 MPa, equivalence ratios of 0.5, 1.0, and 1.5, and NO₂ concentrations from 0 to 2000 ppm. The results show that NO₂ addition significantly promotes NH₃ autoignition, with the enhancement strongly dependent on temperature, pressure, equivalence ratio, and NO₂ concentration. The effect is particularly pronounced at intermediate temperatures (1450-1700 K) and higher pressure, and exhibits a nonlinear relationship with NO₂ concentration. The

SUBMITTER: Liu F 

PROVIDER: S-EPMC12824713 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature