Abstract
The oxidation of ammonium sulfide with ammonium 1, 4-naphthoquinone-2-sulfonate as a redox catalyst in aqueous solutions was studied in a stirred vessel at pH 8.5-9.9 and 22-40°CIt was found that the over-all oxidation rate at HS->2mol/m3 was determined by diffusion rate of oxygen, and conformed to the theory of absorption with pseudo first-order reaction. And the oxidation rate in aqueous solutions was expressed in the following equations, -(HS-) /dθ=k1 (Cat) (O2) (kg-mol/m3hr)k1=1.81×1016exp (-1.08×104/RT)On the other hand, it was found that the over-all oxidation rate at HS-<2 mol/m3 was determined by the reaction Tate in aqueous solutions, and was expressed in the f ollowing equations, -d (HS-) /dθ=k2 (Cat) 0.69 (O2) 0.17 (HS-) 1.0 (OH-) 0.13 (kg-mol/m3hr)k2=3.68×1012exp (-1.27×104/RT)
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