Kinetics in a lean formaldehyde flame

Vandooren, Jacques; Deguertechin, Lo.; Tiggelen, Pierre Van

doi:10.1016/0010-2180(86)90050-7

Cited by 69 publications

(54 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As a consequence of this curvature, the Dean et al [28] estimate is much lower than the current measurements. Amongst the high-temperature estimates [6,7,29,30], there is good agreement with the Peeters and Mahnen [6] value at 1600 K, while a two-parameter fit of the Vandooren et al [7] data provides some support. The Tsang and Hampson [22] evaluation, which is currently used in the GRI Mech 3.0 model, is about 30% higher and shows weaker curvature than the current measurements (see Fig.…”

Section: Kinetic Measurementsmentioning

confidence: 51%

See 1 more Smart Citation

Direct measurements of the reaction OH + CH₂O → HCO + H₂O at high temperatures

Vasudevan

Davidson

Hanson

2004

Int J of Chemical Kinetics

View full text Add to dashboard Cite

The reaction of hydroxyl [OH] radicals with formaldehyde [CH 2 O] was studied at temperatures ranging from 934 K to 1670 K behind reflected shock waves at an average total pressure of 1.6 atm. OH radicals were produced by shock-heating tert-butyl hydroperoxide [(CH 3 ) 3 CO OH], while 1,3,5-trioxane [(CH 2 O) 3 ] was used in the preshock mixtures to generate reproducible levels of CH 2 O. OH concentration time-histories were inferred from laser absorption using the well-characterized R 1 (5) line of the OH A-X (0, 0) band near 306.7 nm. Detailed error analyses, taking into account both experimental and mechanism-induced contributions, yielded uncertainty estimates of ±25% at 1595 K and ±15% at 1229 K for the rate of the reaction between CH 2 O and OH. These uncertainties are substantially lower than the factor of two uncertainty currently used for this reaction at high temperatures. The rate constants were fit with the recent low-temperature measurements of Sivakumaran et al. (Phys Chem Chem Phys 2003,5,4821-4827) to the three-parameter form shown below; this fit reconciles experimental data on the title reaction at low, intermediate, and high temperatures (200-1670 K).The reaction of OH with CH 2 O was also studied using quantum chemical methods at the CCSD(T) level of theory using the 6-311++G(d,p) basis set. The transition state for the H-atom metathesis reaction was located, and reaction rate coefficients were calculated. Reasonable agreement with the experimental measurements was obtained.

show abstract

Section: Kinetic Measurementsmentioning

confidence: 51%

“…There has, to our knowledge, been only a single direct high-temperature measurement of this critical reaction, made at 1205 K, in a shock tube [5]. While estimates exist from flame studies [6,7], there is considerable scatter in the published data [8]; high temperature (>1000 K) experimental data for this reaction are clearly needed.…”

Section: Introductionmentioning

confidence: 91%

Direct measurements of the reaction OH + CH₂O → HCO + H₂O at high temperatures

Vasudevan

Davidson

Hanson

2004

Int J of Chemical Kinetics

View full text Add to dashboard Cite

show abstract

“…Following the previous work of Glarborg et al [15] on CH 2 O conversion, which was later applied with success by Alzueta and Glarborg [37], the same reactions have been used for HCO conversion. It has to be mentioned that, for the conditions of this work, similar results can be obtained when the rate constants derived from the work of Timonen et al [38,39] for formyl thermal decomposition are used, together with the reaction rate taken from the work of Vandooren et al [40] for the HCO + O 2 interaction. Note.…”

Section: Reaction Mechanismmentioning

confidence: 57%

An experimental and modeling study of the oxidation of acetylene in a flow reactor

Alzueta

Borruey

Callejas

et al. 2008

Combustion and Flame

View full text Add to dashboard Cite

“…[Color figure can be viewed in the online issue, which is available at www.interscience.wiley.com.] et al [45] obtained k 28 by investigating the structure of a lean formaldehyde-oxygen flame burning at 22.5 Torr. Figure 17 shows an Arrhenius plot of the suggested expressions for k 28 along with the experimental measurements available in the literature.…”

Section: Figure 17mentioning

confidence: 99%

Autoignition of H₂/CO at elevated pressures in a rapid compression machine

Mittal

Sung

Yetter

2006

Int J of Chemical Kinetics

122

View full text Add to dashboard Cite

Autoignition of H 2 /O 2 and H 2 /CO/O 2 mixtures has been studied in a rapid compression machine at pressures from 15 to 50 bar, temperatures from 950 to 1100 K, and equivalence ratios from 0.36 to 1.6. In addition, the effect of change in relative concentrations of H 2 and CO is investigated by replacing H 2 with CO, while keeping the total fuel mole fraction of the combined H 2 /CO fuel constant. Under the experimental conditions of intermediate temperature and high pressure, reactions involving formation and consumption of HO 2 and H 2 O 2 are important. Results show that for H 2 autoignition, the mechanism of O'Conaire et al. agrees well with the experimental data, although some improvements can still be made. At all the pressures investigated, replacement of some amount of H 2 by CO in a reacting mixture leads to an increase in ignition delay, even with small amounts of CO addition. The inhibition effect of CO addition is also observed to be much more pronounced with increasing pressure. For H 2 /CO mixtures, the existing mechanisms of Li et al., Davis et al., and GRI-Mech 3.0 fail to describe the experimental trend of ignition delay. At a pressure of 50 bar, ignition delays are seen to decrease monotonically with O 2 addition, although such an effect is rather weak. Kinetic analysis further demonstrates that under the present experimental conditions, CO + HO 2 = CO 2 + OH is the primary reaction responsible for the mismatch of experimental and calculated ignition delays. Significant improvements in the ignition delay predictions can be made by reducing this reaction rate.

show abstract

Kinetics in a lean formaldehyde flame

Cited by 69 publications

References 29 publications

Direct measurements of the reaction OH + CH₂O → HCO + H₂O at high temperatures

Direct measurements of the reaction OH + CH₂O → HCO + H₂O at high temperatures

An experimental and modeling study of the oxidation of acetylene in a flow reactor

Autoignition of H₂/CO at elevated pressures in a rapid compression machine

Contact Info

Product

Resources

About

Kinetics in a lean formaldehyde flame

Cited by 69 publications

References 29 publications

Direct measurements of the reaction OH + CH2O → HCO + H2O at high temperatures

Direct measurements of the reaction OH + CH2O → HCO + H2O at high temperatures

An experimental and modeling study of the oxidation of acetylene in a flow reactor

Autoignition of H2/CO at elevated pressures in a rapid compression machine

Contact Info

Product

Resources

About

Direct measurements of the reaction OH + CH₂O → HCO + H₂O at high temperatures

Direct measurements of the reaction OH + CH₂O → HCO + H₂O at high temperatures

Autoignition of H₂/CO at elevated pressures in a rapid compression machine