The Dry Carbon Monoxide–Oxygen Flame

Wires, Robert A.; Watermeier, Leland A.; Strehlow, Roger A.

doi:10.1021/j150576a053

Cited by 13 publications

(1 citation statement)

References 8 publications

(16 reference statements)

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“…In addition to the flame inhibition experiments and modeling, we present measurements of the burning velocity of uninhibited CO-H2-O2-N2 flames with varying amounts of H2, and compare the measurements with calculations. Although there are numerous measurements of CO flame speed in the literature [9,[18][19][20][21], there is a lack of data for near-stoichiometric CO-H2-O2-N2 flames with H2 mole fractions between 1.50•10 -4 and 2.0•10 -2 .…”

Section: Introductionmentioning

confidence: 99%

Inhibition of premixed carbon monoxide-hydrogen-oxygen-nitrogen flames by iron pentacarbonyl

Rumminger

Linteris

1999

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This paper presents measurements of the burning velocity of premixed CO-H2-O2-N2 flames with and without the inhibitor Fe(CO)5 over a range of initial H2 and O2 mole fractions. A numerical model is used to simulate the flame inhibition using a gas-phase chemical mechanism. For the uninhibited flames, predictions of burning velocity are excellent and for the inhibited flames, the qualitative agreement is good. The agreement depends strongly on the rate of the CO+OH↔CO2+H reaction and the rates of several key iron reactions in catalytic Hand O-atom scavenging cycles. Most of the chemical inhibition occurs through a catalytic cycle that converts O atoms into O2 molecules. This O-atom cycle is not important in methane flames. The H-atom cycle that causes most of the radical scavenging in the methane flames is also active in CO-H2 flames, but is of secondary importance. To vary the role of the Hand O-atom radical pools, the experiments and calculations are performed over a range of oxygen and hydrogen mole fraction. The degree of inhibition is shown to be related to the fraction of the net Hand O-atom destruction through the iron species catalytic cycles. The Oatom cycle saturates at a relatively low inhibitor mole fraction (~100 ppm), while the Hatom cycle saturates at a much higher inhibitor mole fraction (~400 ppm). The calculations reinforce the previously suggested idea that catalytic cycle saturation effects may limit the achievable degree of chemical inhibition. ** The reactions and increased rates were FeO+H2O↔Fe(OH)2 (kf = 1.62E+13, increased by 3X), FeOH+H↔FeO+H2 (kf = 1.50E+14 exp(-805/T), increased by 5X), Fe(OH)2+H↔FeOH+H2O (kf = 1.98E+14 exp(-302/T), increased by 3X). † † To avoid excessive repetition, references to previous calculations of Fe(CO)5-inhibited methane flames refer to Ref. [8] unless otherwise noted.

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Section: Introductionmentioning

confidence: 99%

Inhibition of premixed carbon monoxide-hydrogen-oxygen-nitrogen flames by iron pentacarbonyl

Rumminger

Linteris

1999

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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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Burning Velocity in Mixtures of Cyanogen or Hydrogen Cyanide With Oxygen

Ailliet¹,

Tiggelen²

1968

Bulletin des Soc Chimique

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Burning velocity, flame temperature and thickness of the reaction zone have been measured in different cyanogen/oxygen/nitrogen and hydrogen cyanide/oxygen/ nitrogen mixtures. Some measurements have been made also on CaNa/Oz/Na mixtures with addition of hydrogen. Kinetical parameters have been derived: activation energy and reaction order. A kinetical mechanism has been proposed which is based on observations made by others in some studies using the technique of flash photolysis. The experimental study of laminar flame propagation in flammable mixtures involves the determination of three characteristic magnitudes: burning velocity, maximum flame temperature and thickness of the flame reaction zone. The methods which were applied in this work have been described in a previous publication [a.(*)

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The Dry Carbon Monoxide–Oxygen Flame

Cited by 13 publications

References 8 publications

Inhibition of premixed carbon monoxide-hydrogen-oxygen-nitrogen flames by iron pentacarbonyl

Inhibition of premixed carbon monoxide-hydrogen-oxygen-nitrogen flames by iron pentacarbonyl

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

Burning Velocity in Mixtures of Cyanogen or Hydrogen Cyanide With Oxygen

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The Dry Carbon Monoxide–Oxygen Flame

Cited by 13 publications

References 8 publications

Inhibition of premixed carbon monoxide-hydrogen-oxygen-nitrogen flames by iron pentacarbonyl

Inhibition of premixed carbon monoxide-hydrogen-oxygen-nitrogen flames by iron pentacarbonyl

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

Burning Velocity in Mixtures of Cyanogen or Hydrogen Cyanide With Oxygen

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