NIST Chemical Kinetics Database

Author(s):   Golden, D.M.; Smith, G.P.; McEwen, A.B.; Yu, C.-L.; Eiteneer, B.; Frenklach, M.; Yaghjiani, G.L.; Ravishankara, A.R.; Tully, F.P.
Title:   OH(OD) + CO: measurements and an optimized RRKM fit
Journal:   J. Phys. Chem. A
Volume:   102
Page(s):   8598 - 8606
Year:   1998
Reference type:   Journal article
Squib:   1998GOL/SMI8598-8606

Reaction:   DOC(O)· → CO₂ + D
Reaction order:   1
Temperature:   253 - 2600 K
Rate expression:   1.14x10² [s^-1] (T/298 K)^0.39 e^{-151972 [J/mole]/RT}
Category: Experiment
Data type:   Experimental value and limited review
Pressure dependence:   Rate constant is high pressure limit
Comments:   Measurements were made for the rate constant of OH + CO + He at 293 K, and OD + CO + M (M) He, Ar, N₂, air, SF₆) at 253-343 K. Results were also obtained for OH + CO in a shock tube at 1400-2600 K using OH and CO absorption. A two-channel RRKM model of these and other representative results was constructed, with five adjustable parameters. A systematic optimization method was then employed to produce the best fit of the data and provide predictive k(T,P,D/H) expressions for other conditions.

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Rate constant values calculated from the Arrhenius expression:

T (K)	k(T) [s^-1]
253	4.51E-30
300	3.97E-25
400	1.83E-18
500	1.86E-14
600	8.85E-12
700	7.30E-10
800	2.01E-8
900	2.67E-7
1000	2.12E-6
1100	1.16E-5
1200	4.79E-5
1300	1.60E-4
1400	4.49E-4
1500	1.10E-3
1600	2.42E-3
1700	4.85E-3
1800	9.02E-3
1900	1.57E-2
2000	2.59E-2
2100	4.09E-2
2200	6.18E-2
2300	9.03E-2
2400	1.28E-1
2500	1.76E-1
2600	2.37E-1