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Title: Kinetics of the C3H7O2 + NO Reaction: Temperature Dependence of the Overall Rate Constant and the i-C3H7ONO2 Branching Channel
Journal: J. Phys. Chem. A
Volume: 107
Page(s): 3040 - 3047
Year: 2003
Reference type: Journal article
Squib: 2003CHO/MIL3040-3047
Reaction:
(CH3)2CHO2 + NO → (CH3)2CHONO2
Reaction order:
2
Temperature:
213 - 298
K
Pressure: 0.13 bar
Rate expression:
4.9x10-16 [±2.9x10-16 cm3/molecule s] e11474 [±1912 J/mole]/RT
Category: Experiment
Data type:
Derived from fitting to a complex mechanism
Pressure dependence:
None reported
Experimental procedure:
Turbulent flow tube - Data taken vs distance
Excitation technique:
Discharge
Time resolution:
By end product analysis
Analytical technique:
Mass spectrometry
Comments:
Measured rate constants for reaction of C3H7O2 with NO to C3H7O + NO2. In this work, the rate constant reported is for unspecified amount of both n-C3H7O2 and iso-C3H7O2. Prior work by others indicate that the rate constants are relatively the same for both isomers. In addition, in this work the rate of reaction of i-C3H7O2 + NO -> i-C3H7O2NO was measured. Temperature range was 213-298 K. Pressure 100 torr N2. Measurements in a turbulent fast flow reactor. C3H7O2 species were produced by C3H8 + Cl -> C3H7 + HCl plus C3H7 + O2 -> C3H7 + O2. Cl was produced by microwave discharge from Cl2. Product distributions detected with a MS. Rate constant for CC3H7O + NO2 product channel was directly measured, while for formation of C3H7O2NO was derived from a model involving a number of different steps.
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Rate constant values calculated from the Arrhenius expression:
| T (K) | k(T) [cm3/molecule s] |
|---|---|
| 213 | 3.19E-13 |
| 225 | 2.26E-13 |
| 250 | 1.22E-13 |
| 275 | 7.41E-14 |
| 298 | 5.03E-14 |