Reaction kinetics of sodium nitrite and ammonium chloride system considering conversion rate
Aiming at the problem that the existing NaNO 2 /NH 4 Cl reaction kinetic equation that does not consider the conversion rate of reactants is difficult to effectively predict the heat/nitrogen generation situation, the experimental test analysis method is used to explore the H + concentration limit and reaction conversion rate of nitrogen generation reaction. The gray relational analysis method was used to study the influence degree of each factor; the Newton-Raphson iterative method was used to calculate the reaction kinetic parameters of the reaction conversion rate, and the prediction method of the heat generation/nitrogen gas reaction was discussed. The results show that the H + concentration limit of the nitrogen generation reaction in the NaNO 2 /NH 4 Cl system is ≤0.0225 mol / L (or pH≥1.65), and the conversion rate of the nitrogen generation reaction varies with the concentration of reactants and H + The reaction kinetics equation of the NaNO 2 / NH 4 Cl system considering the conversion rate of the reaction is or = 4. 74× 10 4 e -3389/ T c 1. 545 H+ c 1. 346 0 t , η <1, it can effectively and conveniently predict the reaction of heat generation/nitrogen generation.