Modeling oxidizing scrubbers for odor control

In an oxidizing scrubber for odor control, the odorant is absorbed in a scr ubber and must be oxidized to allow steady-state operation. The rate of abs orption depends on the Henry's law coefficient, the gas- and liquid-phase m ass transfer coefficients, and the rate of the oxidation reaction. The effe ct of a liquid-phase reaction on the liquid-phase mass transfer is often ex pressed in terms of an enhancement factor. Pseudo-first-order reaction rate s were estimated for chlorination reactions for selected odorants. For simp le amines and ammonia, the pseudo-first-order reaction rate is very fast, r esulting in high enhancement factors for typical values of the mass transfe r coefficients and odorant liquid-phase diffusion coefficients. For phenol and toluene, the reaction rate is relatively slow, and the enhancement fact or is very close to unity.