Reactions of hydroxyl radicals with hydrogen peroxide at ambient and elevated temperatures. [10 MeV electrons]

Journal Article · Thu Apr 29 00:00:00 EDT 1982 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100206a023· OSTI ID:6497344

Christensen, H ^[1]; Sehested, K; Corfitzen, H

---

1. Studsvik Energiteknik AB, Nykoepig, Sweden

The reaction of hydroxyl radicals with hydrogen peroxide has been studied in the pH range 6.8 to 13.8. k/sub OH+H/sub 2/O/sub 2// was determined to be (2.7 +- 0.3) x 10/sup 7/ dm/sup 3/ mol/sup -1/ s/sup -1/ and k/sub 0/sup -/+HO/sub 2//sup -// to be (4.0 +- 0.5) x 10/sup 8/ dm/sup 3/ mol/sup -1/ s/sup -1/. The rate constants of the cross reactions OH + HO/sub 2//sup -/ and O/sup -/ + H/sub 2/O/sub 2/ could not be determined separately. However, an upper limit of k/sub 0/sup -/+H/sub 2/O/sub 2// = 5 x 10/sup 8/ dm/sup 3/ mol/sup -1/ s/sup -1/ was measured. Consequently, by disregarding this reaction, k/sub OH+HO/sub 2//sup -// was determined to (7.5 +- 1.0) x 10/sup 9/ dm/sup 3/ mol/sup -1/ s/sup -1/. The reaction between OH and H/sub 2/O/sub 2/ was studied at pH 7.8 in the temperature range 14 to 160/sup 0/C, and an activation energy of 14 kJ mol/sup -1/ (3.4 kcal mol/sup -1/) was derived from the Arrhenius plot with a rate constant of (2.7 +- 0.3) x 10/sup 7/ dm/sup 3/ mol/sup -1/ s/sup -1/ at 20/sup 0/C.

• OSTI ID: 6497344
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 86:9; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ACTIVATION ENERGY
AMBIENT TEMPERATURE
BEAMS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
DATA
DECOMPOSITION
ELECTRON BEAMS
ENERGY
ENERGY RANGE
EXPERIMENTAL DATA
HIGH TEMPERATURE
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
HYDROXYL RADICALS
INFORMATION
KINETICS
LEPTON BEAMS
MEDIUM TEMPERATURE
MEV RANGE
MEV RANGE 01-10
NUMERICAL DATA
OXYGEN COMPOUNDS
PARTICLE BEAMS
PEROXIDES
PH VALUE
RADIATION CHEMISTRY
RADIATION EFFECTS
RADICALS
RADIOLYSIS
REACTION KINETICS
TEMPERATURE EFFECTS