On the water absorption of NO and NO2 to form dilute nitric acid

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The last edit to this post was made by ** on 2011-1-3 00:33. Regarding the absorption of NO and NO2 in water to produce dilute nitric acid, the main reactions involved are as follows: the kinetic reaction NO+O2=NO2, and the kinetic equation for this reaction is r=k(T/T0)^n*exp； The equilibrium reactions include NO2 = N2O4, NO2 + H2O = HNO3 + NO, etc., and the equilibrium constants all satisfy the equation lnKeq = A + B/T + ClnT + DT. I am a process engineer at a design institute in China; I have the various parameters involved in the kinetic expressions of these reactions, as well as the parameters A, B, C, and D for the equilibrium constants. By entering these parameters into Aspen and using the column module for pressure-driven or atmospheric-pressure absorption, it is possible to achieve a concentration of dilute nitric acid as high as 45%-50% at the bottom of the column, while the NOx emissions at the top of the column comply with the standard limit of 240 mg/m3. Regarding the design of absorption towers, I hope to exchange ideas and knowledge with everyone, and am willing to design absorption towers free of charge for those in need, to provide them as a reference. QQ，122023734