Niki, H., Maker, P.D., Savage, C.M., and Breitenbach, L.P. (1984)
Fourier Transform Infrared Study of the Kinetics and Mechanism
for the Reaction of Hydroxyl Radical with Formaldehyde
J. Phys. Chem. 1984, 88, 5342.
Abstract
The OH reaction of formaldehyde was studied by the FTIR spectroscopic method in
the presence of 700 Torr of air at 298±2 K. The OH radicals were generated
in the photooxidation of RONO (R=CH3 and C2H5), and 13C-labeled formaldehyde
(13CH2O) was employed as a reactant. Of the two exothermic reaction paths (101) and (A) for the OH-CH2O
reaction, only channel (101) was shown to be operative.
(A) OH + CH2O =
HC(O)OH + H
An average value of k(OH+CH2O)/k(OH+C2H4) = 0.99±0.06 (3sigma)
was determined by the competitive kinetic method. This value combined with
k(OH+C2H4)=[8.48±0.60 (3sigma)]E-12 cm3/molecule s, gives k(101) shown below, in
good agreement with recent direct measurements in diluent Ar at ¾40 torr.
REACTION RATE COEFFICIENTS SUGGESTED IN THIS WORK:
GRI-Mech
Number
('-' sign
means
reverse) |
Reaction |
Rate Coefficient
A T^n exp(-E/RT) |
Temperature
Range
(K) |
A
(mol,cm3,s) |
n
(T in K) |
E
(cal/mol) |
| 101 |
OH + CH2O -> HCO + H2O |
5.06E+12 |
|
|
299 |