Transient oxygen atom yields in H2?O2 ignition and the rate coefficient for O + H2 ? OH + H

Schott, Garry L.; Getzinger, R. W.; Seitz, W. A.

doi:10.1002/kin.550060614

Cited by 39 publications

(11 citation statements)

References 17 publications

(11 reference statements)

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“…Much of the broadband background emission in hydrocarbon flames has been attributed to emission from CO 2 * , but the various, proposed kinetic mechanisms for CO 2 * are not in complete consensus . It has been identified by Broida and Gaydon and Laidler and Shuler that the main reaction that forms CO 2 * is

\begin{matrix} true \\ right CO + normalO + normalM ⇄ {CO}_{2}^{*} + normalM \end{matrix}

However, the rate for this reaction is still up for debate , and there is discrepancy as to the overall order of this reaction as well .…”

Section: Introductionmentioning

confidence: 99%

“…It has been identified by Broida and Gaydon and Laidler and Shuler that the main reaction that forms CO 2 * is

\begin{matrix} true \\ right CO + normalO + normalM ⇄ {CO}_{2}^{*} + normalM \end{matrix}

However, the rate for this reaction is still up for debate , and there is discrepancy as to the overall order of this reaction as well . Although several works have made measurements of CO 2 * chemiluminescence , most have been tailored toward determining the rate of the CO 2 radiative recombination :

\begin{matrix} true \\ right CO + normalO \frac{0pt}{\to} \end{matrix}

…”

Section: Introductionmentioning

confidence: 99%

“…Chemiluminescence from electronically excited CO 2 (herein denoted at CO 2 *) consists of a broad continuum that can extend from below 300 nm to above 600 nm along with discrete CO flame bands . While the continuum is more prominent at high temperatures (above 1000 K) , the flame bands are known to be favored at lower temperatures .…”

Section: Introductionmentioning

confidence: 99%

“…While the continuum is more prominent at high temperatures (above 1000 K) , the flame bands are known to be favored at lower temperatures . The blue radiation observed in carbon monoxide flames is also said to come from CO 2 * emission . Because of its broadband nature, CO 2 * is difficult to isolate experimentally, so verification of the kinetics mechanism is challenging.…”

Section: Introductionmentioning

confidence: 99%

“…Because of its broadband nature, CO 2 * is difficult to isolate experimentally, so verification of the kinetics mechanism is challenging. Rather than using a full kinetics mechanism for CO 2 *, many studies have relied on the fact that CO 2 * chemiluminescence is proportional to the product of the concentrations of carbon monoxide and atomic oxygen .…”

Section: Introductionmentioning

confidence: 99%

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Rate Determination of the CO₂* Chemiluminescence Reaction CO + O + M CO₂* + M

Kopp

Mathieu

Petersen

2014

Int J of Chemical Kinetics

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Electronically excited carbon dioxide (CO 2 *) is known for its broadband emission, and its detection can lead to valuable information; however, owing to its broadband characteristics, CO 2 * is difficult to isolate experimentally, and its chemical kinetics are not well known. Although numerous works have monitored CO 2 * chemiluminescence, a full kinetic scheme for the excited species has yet to be developed. To this end, a series of shock-tube experiments was performed in H 2 -N 2 O-CO mixtures highly diluted in argon at conditions where emission from CO 2 * could be isolated and monitored. These results were used to evaluate the kinetics of CO 2 *, in particular the main CO 2 * formation reaction CO + O + M CO 2 * + M (R1). Based on collision theory, the quenching chemistry of CO 2 * was estimated for 11 collision partners. The final mechanism developed for CO 2 * consists of 14 reactions and 13 species. The rate for (R1) was determined to within about ±60% using low-pressure experiments performed in five different (H 2 -)N 2 O-CO-Ar mixtures, as follows:where R is the universal gas constant in cal/mol-K and T is the temperature in K. Final mechanism predictions were compared with experiments at low and high pressures, with good agreement at both conditions for the temperature dependence of the peak CO 2 * and the CO 2 * species time histories. Comparisons were also made with previous experiments in methane-oxygen mixtures, where there was slight overprediction of CO 2 * experimental trends, but with the results otherwise showing a dramatic improvement over an earlier mechanism. Experimental results and model predictions were also compared with past literature rates for CO 2 *, with good agreement for peak CO 2 * trends and slight discrepancies in CO 2 * species time histories. Overall, the ability of the CO 2 * mechanism developed in this work to reproduce a range of experimental trends represents an important improvement over the existing knowledge base on chemiluminescence chemistry. C

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\begin{matrix} true \\ right CO + normalO + normalM ⇄ {CO}_{2}^{*} + normalM \end{matrix}

However, the rate for this reaction is still up for debate , and there is discrepancy as to the overall order of this reaction as well .…”

Section: Introductionmentioning

confidence: 99%

“…It has been identified by Broida and Gaydon and Laidler and Shuler that the main reaction that forms CO 2 * is

\begin{matrix} true \\ right CO + normalO + normalM ⇄ {CO}_{2}^{*} + normalM \end{matrix}

\begin{matrix} true \\ right CO + normalO \frac{0pt}{\to} \end{matrix}

…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Rate Determination of the CO₂* Chemiluminescence Reaction CO + O + M CO₂* + M

Kopp

Mathieu

Petersen

2014

Int J of Chemical Kinetics

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Dynamics of Oxygen Atom Reactions

Lin¹

1980

Advances in Chemical Physics

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The Structure of Freely Propagating and Burner‐Stabilized Flames in the H₂‐ CO ‐ O₂System

Warnatz

1979

Ber Bunsenges Phys Chem

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Flrrmrnen 1 Reuktionskinetik I Transporterscheinungen CO oxidation at flame conditions is of fundamental interest, since this process is the second stage of hydrocarbon combustion. To investigate this isolated reaction free and burner-stabilized CO -O2 and CO-air flames containing H2 or H 2 0 are considered. It is shown that CO oxidation In the presence of hydrogen is described by the H2 -02 mechanism and the additional reactionsOn the other hand, dry CO -O2 and CO-air mixtures are unreactive. For the reaction CO + OH + C 0 2 + H a rate constant is derived.Besides, details of the water gas equilibration are described.

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Transient oxygen atom yields in H2?O2 ignition and the rate coefficient for O + H2 ? OH + H

Abstract: Time-resolved measurements of the oxygen atom concentration during shock-wave initiated combustion of low-density (25 5 p 5 175 kPa) H2--02--CO-402-Ar

Cited by 39 publications

References 17 publications

Rate Determination of the CO₂* Chemiluminescence Reaction CO + O + M CO₂* + M

Rate Determination of the CO₂* Chemiluminescence Reaction CO + O + M CO₂* + M

Dynamics of Oxygen Atom Reactions

The Structure of Freely Propagating and Burner‐Stabilized Flames in the H₂‐ CO ‐ O₂System

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Transient oxygen atom yields in H2?O2 ignition and the rate coefficient for O + H2 ? OH + H

Abstract: Time-resolved measurements of the oxygen atom concentration during shock-wave initiated combustion of low-density (25 5 p 5 175 kPa) H2--02--CO-402-Ar

Cited by 39 publications

References 17 publications

Rate Determination of the CO2* Chemiluminescence Reaction CO + O + M CO2* + M

Rate Determination of the CO2* Chemiluminescence Reaction CO + O + M CO2* + M

Dynamics of Oxygen Atom Reactions

The Structure of Freely Propagating and Burner‐Stabilized Flames in the H2‐ CO ‐ O2System

Contact Info

Product

Resources

About

Rate Determination of the CO₂* Chemiluminescence Reaction CO + O + M CO₂* + M

Rate Determination of the CO₂* Chemiluminescence Reaction CO + O + M CO₂* + M

The Structure of Freely Propagating and Burner‐Stabilized Flames in the H₂‐ CO ‐ O₂System