Development of a package-sterilization process for aseptic filling machines: a numerical approach and validation for surface treatment with hydrogen peroxide

•Numerical model for a sterilization process using a heated gas mixture containing hydrogen peroxide to predict the location of condensate and its theoretical hydrogen peroxide concentration.•Diagrams based on vapor pressure equations of a hydrogen peroxide mixture with air are integrated in the numerical model.•Numerical results show the effect of gas temperature on the formation of condensate.•The relationship between the hydrogen peroxide gas concentration and degree of sterility are described through experiments.