Absorption of NO in Aqueous NaClO2/Na2CO3 Solutions

The absorption rates of NO into aqueous solutions of NaClO2 blended with Na2CO3 were investigated in a stirred reactor. The experimental results showed that the reaction rate could be expressed as $ N_{\rm NO} = {\sqrt {0.172C_{\rm i}^3 C_{\rm BL}}} $. An equation for a second‐order reaction rate constant between NO and NaClO2, kmn = 5.79 · 1015 exp(–5557.26/T), was obtained. The addition of Na2CO3 into the solution of NaClO2 decreased the reaction rate constant. The optimal absorption conditions involved a NO concentration of 540 ppm, NaClO2 concentration of 50 mol m–3, Na2CO3 concentration of 10 mol m–3, temperature of 333 K and O2 concentration of 4 %, which were determined by an orthogonal experiment. Under these optimal conditions, it was possible for the absorption rate to reach up to 1.9271 · 10–5 mol/(s m2). The absorption rates of NO into aqueous solutions of NaClO2 blended with Na2CO3 are investigated in a stirred reactor. Various operating parameters are tested to determine their effect on the absorption kinetics. Orthogonal design is employed to evaluate the relative importance of these variables and to optimize the absorption conditions.