Relative rate constants for the reaction of atomic oxygen with HO/sub 2/ and OH radicals

Journal Article · Thu Mar 03 04:00:00 EST 1983 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100228a028· OSTI ID:5484275

Keyser, L F

Relative rate constants for the reactions O + HO/sub 2/ ..-->.. OH + O/sub 2/ (1) and O + OH ..-->.. H + O/sub 2/ (2) were obtained by using the discharge-flow resonance fluorescence technique at 2 torr total pressure and 299 K. HO/sub 2/ radicals were generated by reacting atomic hydrogen with an excess of O/sub 2/. Quasi-stead-state concentrations of OH and HO/sub 2/ were established in the presence of excess atomic oxygen. Observed concentration ratios, (OH)/(HO/sub 2/), resulted in a value of 1.7 +/- 0.2 for k/sub 1//k/sub 2/. The error limits are twice the standard deviation obtained from the data analysis. Overall experimental error is estimated to be +/- 25%. This result confirms earlier direct measurements of k/sub 1/ and k/sub 2/ which required knowledge of absolute radical or atomic oxygen concentrations.

• Research Organization: California Inst. of Tech., Pasadena
• OSTI ID: 5484275
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 87:5; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
CHEMICAL REACTION KINETICS
ELEMENTS
FLUORESCENCE
HYDROGEN
HYDROXYL RADICALS
KINETICS
LOW PRESSURE
LUMINESCENCE
MEDIUM TEMPERATURE
NONMETALS
OXYGEN
RADICALS
REACTION KINETICS
RESONANCE FLUORESCENCE
SUPEROXIDE RADICALS