Development of an in-line evaporation unit for the production of gas mixtures containing hydrogen peroxide – numerical modeling and experimental results

•Numerical model of a H2O2-evaporator for industrial surface sterilization purposes.•Vapor-liquid equilibrium diagrams of pure hydrogen peroxide and of an air mixture.•Apparent heat-capacity formulation approximates non-isothermal phase transition.•Validation of the numerical results with experimental data shows good agreement.•Demonstrating the use of numerical model for the design of novel evaporation units