caa a22 4500 477044387 CHVBK 20180405111326.0 cr unu---uuuuu 170330e19961101xx s 000 0 eng 10.1007/BF02111565 doi (NATIONALLICENCE)springer-10.1007/BF02111565 Steady and unsteady co oxidation on platinum with allowance for external diffusion retardation [Elektronische Daten] [N. Smirnov, V. Yuzhakov] A mathematical model for catalytic oxidation of CO on a spherical platinum catalyst with allowance for the influence of gas diffusion is developed and studied. The model explains the origin of the effects of bifurcation and oscillation of a steady reaction rate. The model is based on the four-stage catalytic Elley-Ridley mechanism. In contrast to the case where gas diffusion retardation is ignored and only one basic form of catalyst phase plane exists, owing to the consideration of the effect of gas diffusion, we found two additional regimes of catalyst operation. These additional regimes make it possible to explain the origin of the effects of bifurcation and oscillation of the steady reaction rate by which the reaction rate for a steady-state surface is meant. When the surface concentrations of adsorbing reagents or free catalytic sites vary in the course of the reaction, the regime of catalyst operation is called unsteady. The reaction rate when the catalyst reaches a steady state is determined for all possible regimes of catalyst operation. Based on analysis of the results obtained, we give some practical recommendations on an increase in the reaction rate. The hysteresis of the reaction rate is explained. Plenum Publishing Corporation, 1997 Smirnov N. Lomonosov Moscow State University, 119899, Moscow aut Yuzhakov V. Lomonosov Moscow State University, 119899, Moscow aut Combustion, Explosion and Shock Waves Kluwer Academic Publishers-Plenum Publishers 32/6(1996-11-01), 641-648 0010-5082 32:6<641 1996 32 10573 https://doi.org/10.1007/BF02111565 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02111565 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Smirnov N. Lomonosov Moscow State University, 119899, Moscow aut NATIONALLICENCE 700 1- Yuzhakov V. Lomonosov Moscow State University, 119899, Moscow aut NATIONALLICENCE 773 0- Combustion, Explosion and Shock Waves Kluwer Academic Publishers-Plenum Publishers 32/6(1996-11-01), 641-648 0010-5082 32:6<641 1996 32 10573 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer