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Title: Experimental and theoretical studies of rate coefficients for the reaction O(3P)+CH3OH at high temperatures
Journal: J. Chem. Phys.
Volume: 122
Page(s):
Year: 2005
Reference type: Journal article
Squib: 2005LU/CHO244314
Reaction:
CH3OH + O· → Products
Reaction order:
2
Temperature:
835 - 1777
K
Pressure: 1.45 - 2.60 bar
Rate expression:
2.29x10-10 [±1.8x10-11 cm3/molecule s] e-35004 [±831 J/mole]/RT
Category: Experiment
Data type:
Absolute value measured directly
Pressure dependence:
Rate constant is pressure independent
Experimental procedure:
Static or low flow - Data taken vs time
Excitation technique:
Flash photolysis (laser or conventional)
Time resolution:
In real time
Analytical technique:
Resonance fluorescence
Comments:
Temperature produced by shock heating; O-atoms generated by 248 or 193-nm photolysis of SO2.
Combining present results with those of 1981KEI/TAN2693 obtained at 298-998 K gives:
k = (2.74±0.07) x 10-18T2.25±0.13exp[-(1500±90)/T] cm3s-1
Computational studies also carried out indicating that the channels forming OH + CH2OH dominate at 300 K, while those forming OH + CH3O dominate above 1700 K.
View full bibliographic record.
Rate constant values calculated from the Arrhenius expression:
| T (K) | k(T) [cm3/molecule s] |
|---|---|
| 835 | 1.48E-12 |
| 850 | 1.62E-12 |
| 900 | 2.13E-12 |
| 950 | 2.72E-12 |
| 1000 | 3.40E-12 |
| 1050 | 4.15E-12 |
| 1100 | 4.99E-12 |
| 1150 | 5.89E-12 |
| 1200 | 6.86E-12 |
| 1250 | 7.89E-12 |
| 1300 | 8.98E-12 |
| 1350 | 1.01E-11 |
| 1400 | 1.13E-11 |
| 1450 | 1.26E-11 |
| 1500 | 1.38E-11 |
| 1550 | 1.51E-11 |
| 1600 | 1.65E-11 |
| 1650 | 1.79E-11 |
| 1700 | 1.92E-11 |
| 1750 | 2.07E-11 |
| 1777 | 2.14E-11 |