Intrinsic oxidation kinetics of sulfite catalyzed by peracetic acid under different water quality and light conditions

Abstract

Oxidation of sulfite is an important process in wet flue gas desulfurization. Using highly purified water or distilled water as a reaction medium and a transparent or an opaque intermittent reaction apparatus, the intrinsic oxidation kinetics of sulfite catalyzed by peracetic acid was investigated under four different conditions. The reaction order of the reagents and the activation energy were obtained. The results indicate that water quality and light have no obvious effects on the reaction order and activation energy, but have an influence on the reaction rate constant. The mechanism of the intrinsic reaction is proposed. The results derived with this mechanism are in good agreement with the experimental results.light, water character, peracetic acid, catalyzed oxidation, sulfite, kinetics

Mechanism and Kinetics of Sulfite Oxidation in the Presence of Ethanol

“…However, when using the concentrations of sulfite and ethanol in the rapid reaction equation and assuming that the dissolved oxygen is saturated under heterogeneous conditions, the intrinsic reaction rate of 1.4 × 10 -7 mol • L -1 • s -1 was close to the macroscopic reaction rate. The difference might be due to the light 28 penetrating through the opaque reactor in the intrinsic oxidation experiments compared to the transparent reactor in the macroscopic oxidation experiments. When considering other macroscopic reaction parameters in the intrinsic reaction rate equation, the same phenomenon is observed.…”