Tsuboi, T., Katoh, M., Kikuchi, S., and Hashimoto, K. (1981)
Thermal Decomposition of Methanol behind Shock Waves
Jpn. J. Appl. Phys. 1981, 20, 985
Abstract
The thermal decomposition of methanol in argon behind incident and reflected shock waves is studied. The reaction was followed by ultraviolet (UV) absorption between 1900 and 2200 A and by infrared (IR) emission of methanol at wavelengths 2.4-2.9 µm, 3.1-3.9 µm and 4.8-5.2 µm and of formed species at wavelengths 2.7 µm, 3.6 µm and 4.9 µm. The temperature and the density dependencies of the decomposition rate constants were observed at temperatures from 1500 to 1900 K, at total densities from 1E-5 to 2E-4 mol/cm3 and at concentrations from 0.01% to 1.0% methanol. The experimentally-determined signals are compared with the calculated values and the density-dependent rate constants of the unimolecular reaction of methanol are obtained.

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)
-54* CH2O (+M) -> H + HCO (+M) 6.92E+11   71940 1300-1800
-54** CH2O (+M) -> H + HCO (+M) 2.51E+12   71940 1300-1800
-54*** CH2O (+M) -> H + HCO (+M) 3.55E+12   71940 1300-1800
-56* CH2OH (+M) -> H + CH2O (+M) 1.32E+10   28920 1300-1800
-56** CH2OH (+M) -> H + CH2O (+M) 5.62E+10   28920 1300-1800
-56*** CH2OH (+M) -> H + CH2O (+M) 1.05E+11   28920 1300-1800
-95* CH3OH (+M) -> OH + CH3 (+M) 6.03E+12   74090 1300-1800
-95** CH3OH (+M) -> OH + CH3 (+M) 3.55E+13   75050 1300-1800
-95*** CH3OH (+M) -> OH + CH3 (+M) 8.71E+13   76000 1300-1800

All units are s-1
* total concentration 1E-5 mol/cm3
** total concentration 5E-5 mol/cm3
*** total concentration 1E-4 mol/cm3