The oxidation of carbon monoxide

Hoare, D. E.; Walsh, A. D.

doi:10.1039/tf9545000037

Cited by 41 publications

(4 citation statements)

References 6 publications

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“…Experiments with additives indicate th at formaldehyde may be responsible. Hoare & Walsh (1954) have found that at lower pressures and at temperatures of 500 to 600° C the oxidation of carbon monoxide is still retarded by formaldehyde; with small additions of methane however there is acceleration, but greater additions lead again to retardation.…”

Section: The Role Of Carbon Monoxidementioning

confidence: 99%

The combustion of methane at high temperatures

Burgoyne

Hirsch

1954

Proc. R. Soc. Lond. A

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The combustion at about 1000°C of methane/air mixtures containing up to 5% of methane has been studied using a flow system. Under such conditions the reaction takes place in a few milliseconds. It is little influenced by surface, is retarded by methane and accelerated by oxygen. Below 500 to 600°C there appears to be a change in the kinetics, but no definite trend of apparent activation energy has been distinguished over the whole temperature range. The effect of surface on the reaction increases at lower temperatures. The reaction proceeds via formaldehyde and carbon monoxide, and the further oxidation of the latter is apparently inhibited by the former or by its oxidation products. This results in an accumulation, in the later stages of reaction, of carbon monoxide, which oxidizes rapidly or ignites when the formaldehyde and the methane have been consumed. Carbon dioxide does, however, appear to some extent before this final stage. Hydrogen also appears, and although its oxidation is retarded in the presence of methane, when the methane oxidizes the hydrogen goes ‘in step’ with it. In the presence of hydrogen the oxidation temperature of carbon monoxide is reduced to that of the hydrogen, but on addition of methane the hydrogen and methane are oxidized together, whilst carbon monoxide remains until the methane has disappeared. Ethane also inhibits the combustion of carbon monoxide, but less effectively than an equal amount of methane.

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Section: The Role Of Carbon Monoxidementioning

confidence: 99%

The combustion of methane at high temperatures

Burgoyne

Hirsch

1954

Proc. R. Soc. Lond. A

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“…Table IV presents a summary of The sensitivity of the CO/0 2 reaction rate to the presence of hydrogen is discussed by all of these investigators» Others, including Shuler, Hoare and Walsh, Burgoyne and Hirsch, and Brokaw (88,90,96,91) to name a few, have also reported on this point. There is general agreement that the CO/O-rate is accelerated regardless of whether the hydrogen is introduced to the system via the H 2 0 or the H 2 molecule, although Friedman and Nugent (87) point out that H 2 seems to have a more pronounced catalytic effect.…”

Section: A2 Reaction Mechanism Of the C0/0 2 System With And Withoutmentioning

confidence: 99%

“…The well-documented (86,87,90,91,92,99) sensitivity of the C0/0 2 reaction rate to trace amounts of water vapor and hydrogen suggested that the reaction kinetics characterizing the combustion of C0/0 2 in the gas rocket could be modified by adding H-to the reaction. Accordingly, Bowman performed a few tests in which H-was admitted to the oxidizer-rich mixtures of CO and Air, The details of these tests are found in (32).…”

mentioning

confidence: 99%

Unsteady Combustion in Gaseous Propellant Rocket Motors

Hardesty¹

1970

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“…The system exhibits several important features including upper and lower pressure limits for explosion [4], chemiluminescence [3], and multiple oscillatory explosions [6,11].…”

Section: Introductionmentioning

confidence: 99%

A model for explosions during carbon monoxide oxidation

Pilling¹,

Noyes

1979

Int J of Chemical Kinetics

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During the oxidation of carbon monoxide containing a trace of water, ten well-known atomic and molecular species can be identified as of potential significance. All conceivable reactions of these species in their ground electronic states were considered, and rate constants for all those that are of potential importance are either known or can be estimated with considerable confidence. For compositions and temperatures of experimental interest an isothermal system goes to a single steady state that is stable to perturbation and will neither explode nor oscillate. These steady-state computations also predict that as the temperature is raised above about 1000 K most of the water is converted to H, OH, and HOz radicals. Under such conditions, exothermic reactions would be so rapid that strong thermal gradients would develop in any real system of plausible dimensions. A simple model based on these calculations predicts explosion limits consistent with those observed experimentally. Simultaneous behavior in time and in space must be calculated in detail before it is clear whether or not this model based on ground electronic states can model the oscillations that are sometimes observed in this system.

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The oxidation of carbon monoxide

Cited by 41 publications

References 6 publications

The combustion of methane at high temperatures

The combustion of methane at high temperatures

Unsteady Combustion in Gaseous Propellant Rocket Motors

A model for explosions during carbon monoxide oxidation

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