Low-temperature kinetics of reactions between neutral free radicals. Rate constants for the reactions of OH radicals with N atoms (103 ⩽T/K ⩽ 294) and with O atoms (158 ⩽T/K ⩽ 294)

1994 ◽  
Vol 90 (21) ◽  
pp. 3221-3227 ◽  
Author(s):  
Ian W. M. Smith ◽  
David W. A. Stewart
Keyword(s):  
Free Radicals ◽  
Low Temperature ◽  
Rate Constants ◽  
Oh Radicals ◽  
Low Temperature Kinetics ◽  
Kinetics Of

Ultra-low temperature kinetics of neutral–neutral reactions: rate constants for the reactions of OH radicals with butenes between 295 and 23 K

1994 ◽  
Vol 90 (11) ◽  
pp. 1473-1478 ◽  
Author(s):  
Ian R. Sims ◽  
Ian W. M. Smith ◽  
Pascal Bocherel ◽  
André Defrance ◽  
Daniel Travers ◽  
...  
Keyword(s):  
Low Temperature ◽  
Rate Constants ◽  
Oh Radicals ◽  
Low Temperature Kinetics ◽  
Kinetics Of

An experimental and theoretical study of the kinetics of the reaction between 3-hydroxy-3-methyl-2-butanone and OH radicals

RSC Advances ◽  
2015 ◽  
Vol 5 (34) ◽  
pp. 26559-26568 ◽  
Author(s):  
Angappan Mano Priya ◽  
Gisèle El Dib ◽  
Lakshmipathi Senthilkumar ◽  
Chantal Sleiman ◽  
Alexandre Tomas ◽  
...  
Keyword(s):  
Rate Constants ◽  
Theoretical Study ◽  
Oh Radicals ◽  
First Time ◽  
Kinetics Of

Absolute experimental and theoretical rate constants are determined for the first time for the reaction of 3-hydroxy-3-methyl-2-butanone with OH as a function of temperature. The atmospheric implications are discussed.

scholarly journals Low temperature kinetics of H+ changes of bacterial rhodopsin

1975 ◽  
Vol 15 (9) ◽  
pp. 913-917 ◽  
Author(s):  
B. Chance ◽  
M. Porte ◽  
B. Hess ◽  
D. Oesterhelt
Keyword(s):  
Low Temperature ◽  
Low Temperature Kinetics ◽  
Kinetics Of

Ultra‐low temperature kinetics of neutral–neutral reactions: The reaction CN+O2 down to 26 K

1992 ◽  
Vol 97 (11) ◽  
pp. 8798-8800 ◽  
Author(s):  
I. R. Sims ◽  
J. L. Queffelec ◽  
A. Defrance ◽  
C. Rebrion‐Rowe ◽  
D. Travers ◽  
...  
Keyword(s):  
Low Temperature ◽  
Low Temperature Kinetics ◽  
Kinetics Of

scholarly journals Kinetics of the Toluene Reaction with OH Radical

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-19 ◽  
Author(s):  
Rui Ming Zhang ◽  
Donald G. Truhlar ◽  
Xuefei Xu
Keyword(s):  
High Pressure ◽  
Low Temperature ◽  
Atmospheric Chemistry ◽  
Temperature Regime ◽  
Rate Constants ◽  
Chemical Activation ◽  
Reaction Rates ◽  
State Theory ◽  
Partition Functions ◽  
Kinetics Of

We calculated the kinetics of chemical activation reactions of toluene with hydroxyl radical in the temperature range from 213 K to 2500 K and the pressure range from 10 Torr to the high-pressure limit by using multistructural variational transition state theory with the small-curvature tunneling approximation (MS-CVT/SCT) and using the system-specific quantum Rice-Ramsperger-Kassel method. The reactions of OH with toluene are important elementary steps in both combustion and atmospheric chemistry, and thus it is valuable to understand the rate constants both in the high-pressure, high-temperature regime and in the low-pressure, low-temperature regime. Under the experimental pressure conditions, the theoretically calculated total reaction rate constants agree well with the limited experimental data, including the negative temperature dependence at low temperature. We find that the effect of multistructural anharmonicity on the partition functions usually increases with temperature, and it can change the calculated reaction rates by factors as small as 0.2 and as large as 4.2. We also find a large effect of anharmonicity on the zero-point energies of the transition states for the abstraction reactions. We report that abstraction of H from methyl should not be neglected in atmospheric chemistry, even though the low-temperature results are dominated by addition. We calculated the product distribution, which is usually not accessible to experiments, as a function of temperature and pressure.

Kinetics of cyclohexene hydrogenation and of thiophene hydrogenolysis over cobalt-molybdenum catalysts of different composition

1979 ◽  
Vol 44 (12) ◽  
pp. 3676-3687 ◽  
Author(s):  
Vlastimil Vyskočil ◽  
Miloš Kraus
Keyword(s):  
Low Temperature ◽  
Rate Constants ◽  
Atmospheric Pressure ◽  
Kinetic Data ◽  
Oxygen Adsorption ◽  
Experimental Rate ◽  
Cyclohexene Hydrogenation ◽  
Molybdenum Catalysts ◽  
Kinetics Of

The kinetics of the title reactions has been measured at 350°C and atmospheric pressure on six Co-Mo-AL2O3 catalysts prepared by successive impregnation of the support with solutions of molybdenum and cobalt salts and containing these components in different ratios as well as on a commercial Cherox 36-00 catalyst. The activity of these catalysts depend strongly on their composition and showed similar trends for both reactions. Kinetic data were correlated by equations of Langmuir-Hishelwood type. Their adsorption coefficients have a similar value for different catalysts and all differences in the activity reflected in rate constants. Surface concentrations of molybdenum were determined by low temperature oxygen adsorption and were correlated with experimental rate constants.

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