レドックス触媒による硫化水素アンモニウムの液相空気酸化反応

抄録

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°C
It 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)