The economic design of a distillation column or distillation sequences is a challenging problem that has been addressed by superstructure approaches. However, these methods have not been widely used because they lead to mixed-integer nonlinear programs that are hard to solve, and require complex initialization procedures. In this paper, we propose to address this challenging problem by substituting the distillation columns by kriging-based surrogate models generated via state of the art distillation models. We study different columns with increasing difficulty, and show that it is possible to get accurate kriging based surrogate models. The optimization strategy ensures that convergence to a local optimum is guaranteed for numerical noise-free models. For distillation columns (slightly noisy systems), Karush-Kuhn-Tucker optimality conditions cannot be tested directly on the actual model, but still we can guarantee a local minimum in a trust region of the surrogate model that contains the actual local minimum.Topical Heading: Process System Engineering.

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Superstructure approaches are the solution to the difficult problem which involves the rigorous economic design of a distillation column. These methods require complex initialization procedures and they are hard to solve. For this reason, these methods have not been extensively used. In this work, we present a methodology for the rigorous optimization of chemical processes implemented on a commercial simulator using surrogate models based on a kriging interpolation.Several examples were studied, but in this paper, we perform the optimization of a superstructure for a non-sharp separation to show the efficiency and effectiveness of the method. Noteworthy that it is possible to get surrogate models accurate enough with up to seven degrees of freedom.

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Resumen: La web semántica es una excelente herramienta para la transferencia y difusión del conocimiento y para la promoción del patrimonio cultural. Ofrece, además, muchas posibilidades para el trabajo colaborativo entre los profesionales de la investigación, docencia y el patrimonio cultural.  En este texto se exponen las principales líneas de trabajo del proyecto "Guerra e Historia Pública", cuyo objetivo principal es la creación de una plataforma digital sobre la guerra de la Independencia española. Esta plataforma incluye una aplicación principal, la web semántica (https://www.guerra-historia-publica.es), que ofrece recursos inteligentes, todos ellos geolocalizados, y que pueden ser empleados desde distintos puntos de vista: docente, investigador, educativo y turístico. Al final del texto se presentan las conclusiones del trabajo realizado en dicha web.Palabras clave: guerra, historia pública, web semántica, plataforma digital, geolocalización.Abstract: The semantic web is an excellent tool for the transfer and dissemination of knowledge and for the promotion of cultural heritage. It also offers many possibilities for collaborative work among professionals in research, teaching and cultural heritage. This text presents the main lines of work of the project "Guerra e Historia Pública", whose main objective is the creation of a digital platform about the Spanish War of Independence. This platform includes a main application, the semantic web (https://www.guerra-historiapublica.es), which offers different smart resources, all of them geolocated, and which can be used from different points of view: teaching, research, education and tourism. The conclusions of the work carried out on this website are presented at the end of the text.Keywords: war, public history, semantic web, digital platform, geolocation.