03-28U

Topical review of some papers on chemical kinetic catalysis of ammonia on metal surfaces is presented. Differential equations system for modelling the process is offered and results of reduced system with diffusion neglected solution and constant reaction coefficients are presented. Temperature was taken equal $T=427^{\circ }C$. Calculations were made considering catalyst surface ready for the reaction -- incoming components ($H_2$ and $N_2$) are already adsorbed. Reaction product -- $NH_3$ at catalyst surface. Results shows good the qualitative reaction mechanism. It is obtained that first $NH$ dominate, then $NH_2$ and at last both drops to zero and $NH_3$ forms. Also we attempted to investigate dependence of reaction results on ${\begingroup E_i\endgroup \over T}$.