Direct studies of the thermal decomposition of N{sub 2}O and CO{sub 2} and of the reaction of CO with O{sub 2}
Conference
·
OSTI ID:10118669
The thermal decompositions of N{sub 2}O and CO{sub 2} was investigated by monitoring the kinetics of formation of O({sup 3}P) atoms in the reflected shock regime using atomic resonance absorption spectrophotometry (A.R.A.S.). The temperature range was 1805K to 2379K for N{sub 2}O and 2332K to 2869K for CO{sub 2}. Total densities were 3--4 {times} 10{sup 18} molecules cm{sup {minus}3} and hence the reported rate constants are at or near the low pressure limit for unimolecular decomposition. The results were expressed by the following Arrhenius equations: CO{sub 2} k(T) = (1.63 {plus_minus} 1.96) {times} 10{sup {minus}8} exp({minus}122565 {plus_minus} 5183/RT) cm{sup 3} molecule{sup {minus}1} s{sup {minus}1} N{sub 2}O k(T) = (6.02 {plus_minus} 2.81) {times} 10{sup 10} exp({minus}53397 {plus_minus} 1865/RT) cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}. Uncertainties in the Arrhenius expressions are given at the one standard deviation level and the mean deviations of the experimental data from the respective expression are {plus_minus} 18.6% and {plus_minus} 30.7%. Corresponding values for the reverse reaction, k{sub rev}(CO{sub 2}) were computed from the expression k{sub for}/k{sub rev} = K{sub c}. The value obtained for k{sub rev}(CO{sub 2}) was (2.18 {plus_minus} 0.83) {times} 10{sup {minus}34} cm{sup 6} molecule{sup {minus}2} s{sup {minus}1}, independent of temperature from 2332K to 2869K. Preliminary results are also reported for the direct determination of the rate constant for the reaction, CO + O{sub 2} {yields} CO{sub 2} + O, from measurements of the initial rate of formation of O({sup 3}P) atoms. 35 refs., 9 figs., 4 tabs.
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 10118669
- Report Number(s):
- BNL--46985; CONF-920707--17; ON: DE92007183
- Country of Publication:
- United States
- Language:
- English
Similar Records
Direct studies of the thermal decomposition of N sub 2 O and CO sub 2 and of the reaction of CO with O sub 2
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Temperature dependence of the collisional quenching of NH(a sup 1. Delta. ) by N sub 2 , O sub 2 , CO, and Xe
Conference
·
Tue Dec 31 23:00:00 EST 1991
·
OSTI ID:5421188
Rate constants for the reaction, O( sup 3 P) + H sub 2 O r equilibrium OH + OH, over the temperature range 1053K to 2033K using two direct techniques
Conference
·
Sun Dec 31 23:00:00 EST 1989
·
OSTI ID:6382038
Temperature dependence of the collisional quenching of NH(a sup 1. Delta. ) by N sub 2 , O sub 2 , CO, and Xe
Journal Article
·
Thu Apr 19 00:00:00 EDT 1990
· Journal of Physical Chemistry; (USA)
·
OSTI ID:6902679
Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201
ARRHENIUS EQUATION
ATOMS
CARBON DIOXIDE
CARBON MONOXIDE
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
CHEMICAL REACTIONS
DECOMPOSITION
EXCITED STATES
NITROUS OXIDE
OXYGEN
PHOTOLYSIS
RADIATION ABSORPTION ANALYSIS
SHOCK TUBES
TEMPERATURE RANGE 1000-4000 K
400201
ARRHENIUS EQUATION
ATOMS
CARBON DIOXIDE
CARBON MONOXIDE
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
CHEMICAL REACTIONS
DECOMPOSITION
EXCITED STATES
NITROUS OXIDE
OXYGEN
PHOTOLYSIS
RADIATION ABSORPTION ANALYSIS
SHOCK TUBES
TEMPERATURE RANGE 1000-4000 K