1. Under anaerobic conditions, the equilibrium constant of NO absorption by ethylenediamine cobalt complex solution was studied. Through the analysis of the experimental results, the reaction equation of NO with cobalt ethylenediamine ion is: NO+[CO (EN) 3] 2++H2O (=) [CO (EN) 2 (NO) (H2O)] 2++EN at 30 ~ 90℃. The equilibrium constant KP = 3.3158×10-4 exp (4,428.5/t) (bar-1), where the reaction enthalpy △ h0 =-36.821kj mol-/kloc-0.
2. Under aerobic conditions, the effects of temperature, absorption solution concentration, pH, NO partial pressure, SO2 partial pressure and O2 partial pressure on NO absorption rate were investigated, and the related kinetic deduction and simulation calculation were carried out. The experimental results show that the absorption of NO by cobalt ethylenediamine solution is a fast pseudo-1.4 order reaction. The optimum temperature for NO absorption is 50℃. When the temperature is lower than 50℃, the absorption rate of NO increases with the increase of temperature, while when the temperature is higher than 50℃, the absorption rate decreases with the increase of temperature. The absorption rate of NO increases with the increase of oxygen content; For high concentration cobalt ethylenediamine solution, the increase of pH value and NO partial pressure can promote the increase of absorption rate. In a certain pH range, the absorption rate of NO increases with the increase of solution pH; It increases with the increase of gas phase NO partial pressure; However, the presence of SO2 in the gas phase is not conducive to the absorption of NO, and the absorption rate of NO decreases with the increase of SO2 concentration in the gas phase. The kinetic equation of NO adsorption under certain experimental conditions is Na = √ 5929× PO20.4848 PSO 2-0.4364 COH-0.05498 CAI 2.4.