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Absorption kinetics of ozone in aqueous O‐cresol solutions
Author(s) -
Beltran F. J.,
Encinar J. M.,
GarciaAraya J. F.
Publication year - 1992
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450700120
Subject(s) - ozone , chemistry , kinetics , reaction rate constant , absorption (acoustics) , reactivity (psychology) , arrhenius equation , aqueous solution , thermodynamics , kinetic energy , reaction rate , chemical kinetics , analytical chemistry (journal) , photochemistry , organic chemistry , materials science , catalysis , activation energy , medicine , physics , alternative medicine , pathology , quantum mechanics , composite material
The kinetics of ortho‐cresol ozonation in water has been studied using the film theory. At most experimental conditions investigated, the kinetic regime of the absorption has been fast pseudo first order with respect to ozone. At 30°C mass transfer plays an important role in controlling the absorption rate of ozone. The selfdecomposition reaction of ozone does not take place because of the great reactivity of o‐cresol with ozone. Reaction rate constants have been determined at pH 7 for different temperatures below 30°C. The following Arrhenius equation was obtained: k T = 2.2 × 10 23 exp(‐11784/T), L/mol ṁ s At temperatures below 30°C there exists an ozone partial pressure value above which the ozone absorption kinetic regime changes to fast second order regardless of experimental conditions.