Mixture rules and falloff are now major uncertainties in experimentally derived rate parameters for H + O2 (+M) ↔ HO2 (+M)
Mixture rules and falloff are now major uncertainties in experimentally derived rate parameters for H + O2 (+M) ↔ HO2 (+M)
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混合规则和衰减现在是实验得出的 H O2 (M) – HO2 (M) 速率参数中的主要不确定性
DOI:
10.1016/j.combustflame.2019.11.041
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发表时间:
2020
影响因子:
4.4
通讯作者:
Burke, Michael P.
中科院分区:
文献类型:
--
作者:
Lei, Lei;Burke, Michael P.
Rate constants for the title reaction for different bath gas species, M, are essential to accurate combustion predictions. Most experimental studies of the title reaction assume the reaction is in the low-pressure limit. Furthermore, experimental studies for M = H2O usually rely on measurements in H2O/Amixtures, separate measurements in a reference bath gas M =A, and an assumed mixture “rule,” which estimates rate constants in the mixture from those of pure bath gases. We present results from master equation calculations to quantify the uncertainties due to these assumptions in experimental interpretations. Our calculations indicate potential errors due to falloff and mixture rule assumptions that would be imperceptible experimentally over typical variations of pressure and composition yet introduce substantial uncertainties (reaching ∼ 50%) in reported rate constants, which often involve extrapolation to zero pressure and unity mole fraction. Going forward, we recommend that experimentally determined pseudo-second-order rate constants for H + O2↔ HO2for the experimental pressure and mixture composition (which are independent of these assumptions) be reported, that experiments used to derive rate constants in the low-pressure limit or for M = H2O be conducted at lower pressures and higher H2O fractions (where these assumptions are more accurate), and that uncertainty analysis consider uncertainties due to falloff and mixture rule assumptions.
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影响因子:
1.7
作者:
L. B. Harding;S. Klippenstein;H. Lischka;R. Shepard
通讯作者:
R. Shepard
影响因子:
3.4
作者:
M. Barbet;K. McCullough;M. P. Burke
通讯作者:
M. P. Burke
DOI:
--
发表时间:
1987
期刊:
影响因子:
--
作者:
K. Hsu;J. L. Durant;F. Kaufman
通讯作者:
F. Kaufman
影响因子:
--
作者:
F. A. Lindemann;S. Arrhenius;I. Langmuir;N. Dhar;J. Perrin;W. C. M. Lewis
通讯作者:
F. A. Lindemann;S. Arrhenius;I. Langmuir;N. Dhar;J. Perrin;W. C. M. Lewis
DOI:
10.1002/bbpc.19800840902
发表时间:
1980
期刊:
The journal of physical chemistry. A
影响因子:
--
作者:
J. Troe
通讯作者:
J. Troe