scholarly journals Self-sustained combustion of carbon monoxide over CuCe0.75Zr0.25Oδ catalyst: Stability operation and reaction mechanism

2019 ◽  
Vol 37 (4) ◽  
pp. 5507-5515 ◽  
Author(s):  
Feng Bin ◽  
Running Kang ◽  
Xiaolin Wei ◽  
Qinglan Hao ◽  
Baojuan Dou
Keyword(s):  
Carbon Monoxide ◽  
Reaction Mechanism ◽  
Catalyst Stability

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.

The reactivity of stoichiometric tungsten oxide clusters towards carbon monoxide: the effects of cluster sizes and charge states

2015 ◽  
Vol 17 (17) ◽  
pp. 11499-11508 ◽  
Author(s):  
Shu-Juan Lin ◽  
Jing Cheng ◽  
Chang-Fu Zhang ◽  
Bin Wang ◽  
Yong-Fan Zhang ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Reaction Mechanism ◽  
Dft Calculations ◽  
Tungsten Oxide ◽  
Charge States

DFT calculations were carried out to study the reaction mechanism for tungsten oxide clusters with CO.

Reaction mechanism of preferential oxidation of carbon monoxide on Pt, Fe, and Pt–Fe/mordenite catalysts

2005 ◽  
Vol 236 (2) ◽  
pp. 262-269 ◽  
Author(s):  
M KOTOBUKI ◽  
A WATANABE ◽  
H UCHIDA ◽  
H YAMASHITA ◽  
M WATANABE
Keyword(s):  
Carbon Monoxide ◽  
Reaction Mechanism ◽  
Preferential Oxidation ◽  
Oxidation Of Carbon Monoxide

Carbon Monoxide Dehydrogenase Reaction Mechanism: A Likely Case of Abnormal CO2Insertion to a Ni−H−Bond

2011 ◽  
Vol 50 (5) ◽  
pp. 1868-1878 ◽  
Author(s):  
Patricia Amara ◽  
Jean-Marie Mouesca ◽  
Anne Volbeda ◽  
Juan C. Fontecilla-Camps
Keyword(s):  
Carbon Monoxide ◽  
Reaction Mechanism ◽  
Carbon Monoxide Dehydrogenase ◽  
Dehydrogenase Reaction

Mechanism of Decarburization of Alloy 617 at 1000°C in Helium Containing CO and CO2 as impurities

2008 ◽  
Vol 1125 ◽  
Author(s):  
Deepak Kumar ◽  
Gary S. Was
Keyword(s):  
Carbon Monoxide ◽  
Reaction Mechanism ◽  
Gas Phase ◽  
Phase Analysis ◽  
Gas Mixture ◽  
Alloy 617 ◽  
Helium Gas ◽  
The Matrix ◽  
Probe Measurements ◽  
Microstructural Examination

ABSTRACTThe objective of this study was to determine the mechanism of decarburization of alloy 617 by investigating the surface and bulk stabilities of the alloy in helium gas containing only CO and CO2 impurities over the temperature range 900-1000°C. For this purpose, the alloy was pre-oxidized at 900°C for 150h in He + 15 ppm CO + 1.6 ppm CO2 gas mixture and subsequently decarburized at 1000°C for additional 100h. The reaction mechanism was corroborated through gas phase analysis, microstructural examination and micro-probe measurements. It was determined that decarburization of the alloy occurred via a reaction between the porous Cr2O3 scale (formed during pre-oxidation) and carbon in the alloy, resulting in chromium metal and carbon monoxide. The chromium diffused back into the matrix, whereas the carbon monoxide escaped the sample through existing cracks and pores in the oxide. Therefore, this study shows that decarburization of alloy 617 occurs in a helium gas containing only CO and CO2 impurities.

The thermal oxidation of methylamine

1951 ◽  
Vol 209 (1097) ◽  
pp. 218-238 ◽  
Keyword(s):  
Carbon Monoxide ◽  
Reaction Mechanism ◽  
Nitrogen Oxides ◽  
Major Part ◽  
Close Agreement ◽  
Inert Gases ◽  
Rate Of Reaction ◽  
Secondary Reactions ◽  
Kinetics Of ◽  
Oxidation Analysis

A study has been made of the kinetics of the reaction of gaseous methylamine with oxygen. Since the nitrogen atom is eliminated from the molecule in the course of the oxidation, analysis of the products formed at various stages yields evidence about the reaction mechanism which is not available in the study of hydrocarbons. The variation of oxidation rate with time may be represented by the equation dp / dt ═ B e ct + D , and the influence of reactant pressures and of temperature on C and D has been determined. Inert gases do not affect the course of the oxidation, but an increase in surface inhibits the reaction to an extent dependent on the composition of the reactant mixture. Since the later stages of the oxidation are complicated by secondary reactions, the analytical results for the early stages provide the most useful information about the main chemical reactions occurring. The greater part of the combined nitrogen is initially converted to ammonia, but small quantities of nitrogen oxides are also formed. The fact that the concentration of ammonia is lowered and that of nitrogen oxides is raised by increasing oxygen pressure suggests that both products arise from reaction of NH 2 radicals with the original reactants. One source of these radicals is probably the breakdown of intermediate peroxides such as NH 2 CH 2 —O—O—H, the concentration of which largely controls the rate of reaction. Such a decomposition should give rise to formaldehyde and ammonia in approximately equal amounts. The non-equivalence of these products suggests, however, that the major part of the ammonia is formed in some other way, and it is supposed that peroxide radicals such as NH 2 CH 2 —O—O— may, instead of reacting with methylamine to give the peroxide as usually postulated, themselves decompose unimolecularly to give ammonia and carbon monoxide. An attempt is made to construct a simplified theory of the oxidation, to estimate the relative frequencies of some of the proposed reaction stages and hence to calculate certain ratios of velocity constants. The suggested mechanism leads to kinetic relationships in close agreement with those found experimentally.

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