EFFECTS OF FINITE REACTION RATES ON THE KINETIC PHASE TRANSITIONS IN THE CATALYTIC OXIDATION OF CARBON MONOXIDE

2002 ◽  
Vol 09 (05n06) ◽  
pp. 1735-1739
Author(s):  
L. D. LÓPEZ-CARREÑO
Keyword(s):  
Carbon Monoxide ◽  
Phase Transitions ◽  
Steady State ◽  
Catalytic Oxidation ◽  
Active Sites ◽  
Nearest Neighbor ◽  
Reaction Rates ◽  
Neighbor Site ◽  
State Configuration ◽  
Oxidation Of Carbon Monoxide

Oxidation of carbon monoxide is one of the most extensively studied heterogeneous catalysis reactions, being important among other applications in automobile-emission control. Catalytic oxidation of carbon monoxide on platinum (111) surface was simulated by the Monte Carlo technique following an extended version of the model proposed by Ziff, Gulari and Barshad (ZGB). In the simulation, a simple square two-dimensional lattice of active sites replaces the surface of the catalyst. Finite reaction rates for (i) diffusion of the reactive species on the surface, (ii) reaction of a CO molecule with an oxygen atom in a nearest neighbor site, and (iii) desorption of unreacted CO molecules, have been taken into account. The produced CO 2 desorbs instantly. The average coverage of O, CO and the CO 2 production rate for a steady state configuration, as a function of the normalized CO partial pressure (P CO ), shows two kinetic phase transitions. In the ZGB model these transitions occur at P CO ≈ 0.39 and P CO ≈ 0.53. For 0.39 < P CO < 0.53 a reactive ( CO 2 production) steady state is found. Outside of the interval, the only steady state is a poisoned catalyst of pure CO or pure O. Our results show that finite reaction rates shift the values in which these phase transitions occur.

Cobalt oxide decorated porous silica particles: structure and activity relationship in the catalytic oxidation of carbon monoxide

2021 ◽  
pp. 152121
Author(s):  
Daniil A. Eurov ◽  
Tatiana N. Rostovshchikova ◽  
Marina I. Shilina ◽  
Demid A. Kirilenko ◽  
Maria V. Tomkovich ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Catalytic Oxidation ◽  
Cobalt Oxide ◽  
Porous Silica ◽  
Silica Particles ◽  
Activity Relationship ◽  
Structure And Activity ◽  
Oxidation Of Carbon Monoxide

An atomic-level insight into the basic mechanism responsible for the enhancement of the catalytic oxidation of carbon monoxide on a Cu/CeO2 surface

2017 ◽  
Vol 19 (5) ◽  
pp. 3498-3505 ◽  
Author(s):  
Kenichi Koizumi ◽  
Katsuyuki Nobusada ◽  
Mauro Boero
Keyword(s):  
Carbon Monoxide ◽  
Reaction Mechanism ◽  
Catalytic Oxidation ◽  
Morphological Changes ◽  
Basic Mechanism ◽  
Atomic Level ◽  
Insight Into ◽  
Oxidation Of Carbon Monoxide

Reaction mechanism of CO molecules onto a Cu/CeO2 surface and morphological changes.

Catalytic Oxidation of Carbon Monoxide over Ag0.35V2O5

1982 ◽  
Vol 86 (1) ◽  
pp. 43-45 ◽  
Author(s):  
J. Den Van Berg ◽  
J. H. L. M. Brans-Brabant ◽  
A. J. van Dillen ◽  
J. C. Flach ◽  
J. W. Geus
Keyword(s):  
Carbon Monoxide ◽  
Catalytic Oxidation ◽  
Oxidation Of Carbon Monoxide
Sign in / Sign up

Export Citation Format

Share Document