Relative rates of reaction of hydroxyl radicals with O(3P) atoms and CO molecules

Campbell, Ian; Handy, Brian J.

doi:10.1016/0009-2614(77)85019-7

Cited by 9 publications

(5 citation statements)

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“…On the basis of the studies of Clyne3 and Westenberg et al, 8 where the reaction was studied over rather limited temperature ranges, it has been concluded in all recent evaluations10"12 that the rate constant exhibits no temperature dependence. In rate-constant studies, there has been one study where the 0(3P) + OH rate constant was determined relative to the CO + OH rate constant at 425 K. 13 The result appears to be consistent with the absolute rate-constant determinations. In addition to the studies of the 0(3P) + OH reaction, there have been numerous kinetic studies of the + 02 OH + O reaction (reaction -1) between 700 and 2500 K,14 the data of which have been the subject of several reviews and evaluations.…”

Section: Introductionmentioning

confidence: 56%

Temperature dependence of the reaction O(3P) + OH(2II) .fwdarw. O2 + H

Lewis¹,

Watson²

1980

J. Phys. Chem.

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Section: Introductionmentioning

confidence: 56%

Temperature dependence of the reaction O(3P) + OH(2II) .fwdarw. O2 + H

Lewis¹,

Watson²

1980

J. Phys. Chem.

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“…However, recent low-pressure discharge/photolysis LIF measurements of OH time decays in excess O report a 30% higher rate constant value at 298 K and a slightly greater increase at lower temperature. 17 Although the NASA panel recommendation and our recent measurement favor a 298 K rate constant of 3.3 × 10 -11 cm 3 /molecule/s, a second cluster of measurements 18,19 suggests higher values of 4.2 × 10 -11 . The limited set of experiments all deal with discharge flow measurements.…”

Section: Introductionmentioning

confidence: 77%

“…Several authors offer trajectory calculation predictions for rate constants down to low temperatures. [7][8][9][10][11] Experimental rate constant results from the literature [12][13][14][15][16][17][18][19] are shown in Figure 1. Three temperature-dependent studies of the O + OH rate constant [12][13][14] were used to derive the NASA panel recommendation.…”

Section: Introductionmentioning

confidence: 99%

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Temperature Dependence of O + OH at 136−377 K Using Ozone Photolysis

Robertson

Smith

2006

J. Phys. Chem. A

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Ozone was photolyzed at 248 nm in 40 Torr nitrogen with small amounts of water or hydrogen added in a cooled or heated flow cell, to measure the O + OH rate constant at 136-377 K. Rate constant values were determined by kinetic modeling of the OH decays in excess O as monitored by laser-induced fluorescence and are in reasonable agreement with current recommendations. Results may be summarized by the expression k = 11.2 x 10(-11) T(-.32) e(177/T) cm3/molecule/s.

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“…The measurement for (2), 3 x 10-11 cm 3 s-1 at 300 K, represents the first experimental determination of a rate constant for this reaction. We adopted a value 9 x 10-11 exp ( -300/T) for reaction (4) consistent with measurements by Campbell & Hardy (1977) and Westenberg, deHaas & Roscoe (1970). Rate constants adopted for present purposes are summarized in table 1.…”

Section: Chemistr Ymentioning

confidence: 99%

Atmospheric chemistry: response to human influence

Logan

Prather

Wofsy

et al. 1978

Phil. Trans. R. Soc. Lond. A

165

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Present understanding of global atmospheric chemistry is reviewed. Models are presented and compared with a wide range of atmospheric observations, with emphasis on the stratosphere. In general, excellent agreement is found between the calculated and observed distributions of long lived trace gases. The abundances of many shorter lived species are also satisfactorily reproduced, including NO 2 , HNO 3 , O, O 3 , OH and ClO. Discrepancies between theory and observation are examined and their significance assessed. The influence of human perturbations due to combustion, agriculture and chlorocarbon releases is discussed with emphasis on O 3 . Uncertainties associated with present models are highlighted. Combustion related releases of CO cause a decrease in the abundance of tropospheric OH with consequent increase in the concentrations of CH 4 , H 2 , CH 3 Cl and other halocarbons. CO emissions may become sufficiently large during the next century to induce substantial increases in tropospheric ozone on a global scale. Recombination of nitrogen fixed by agriculture and combustion may lead to an enhanced source of atmospheric N 2 O with a related impact on stratospheric NO x . Chlorocarbon industry provides an important source of stratospheric chlorine, and enhanced levels of stratospheric Cl x and NO x may cause a significant reduction in the abundance of atmospheric O 3 , by as much as 10% during the next century. Perturbations due to various anthropogenic activities interact in a nonlinear fashion and the influence on atmospheric chemistry is correspondingly complex.

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Relative rates of reaction of hydroxyl radicals with O(3P) atoms and CO molecules

Cited by 9 publications

References 9 publications

Temperature dependence of the reaction O(3P) + OH(2II) .fwdarw. O2 + H

Temperature dependence of the reaction O(3P) + OH(2II) .fwdarw. O2 + H

Temperature Dependence of O + OH at 136−377 K Using Ozone Photolysis

Atmospheric chemistry: response to human influence

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