Seminari



Advanced reactor analysis and design through reactive Computational Fluid Dynamics and hierarchical approach
08-02-2024
Prof. Mauro Bracconi, Laboratory of Catalysis and Catalytic Processes - Dipartimento di Energia, Politecnico di Milano - Multiscale modelling, incorporating Computational Fluid Dynamics (CFD) and detailed microkinetic description of the chemical reactivity, is a key tool for understanding reactor and process behaviour [1]. This talk will discuss advanced multiscale methods that detail fluid dynamics, species interactions, heat transfer, and surface reactivity in various flows conditions and reactor configurations [2,3]. It will address strategies to minimize computational costs, from traditional methods to Machine Learning [4]. However, the direct application of these methods to realistic industrial systems is limited by high computational demands. The presentation will introduce a hierarchical approach [5], that employs highly detailed multiscale CFD simulations in selected but relevant conditions to achieve a fundamental understanding of the complex interplay between transport and surface reactivity. In doing so, engineering correlations are developed and employed in macroscopic reactor models, enabling efficient reactor design. Applications of this approach in micro-packed bed reactors and structured catalyst supports will be showcased [5,6]. Bibliography [1] M. Maestri, Chem. Commun. 53 (2017) 10244–10254. [2] D. Micale, et al., Chemie Ing. Tech. (2022). [3] M. Bracconi, Chem. Eng. Res. Des. 179 (2022) 564–579. [4] M. Bracconi, M. Maestri, Chem. Eng. J. (2020) 125469. [5] M. Bracconi, et al. Chem. Eng. Proc. – Proc. Int. 181 (2022) 109148 [6] M. Bracconi, et al., Chem. Eng. J. 352 (2018) 558–571.
Fire Safety Engineering principles
23-06-2023
Il 23 giugno 2023 alle ore 15.30, il prof. Lars Schiott Sorensen, professore visitatore del DTU (Technical University of Denmark) nell'ambito delle attività didattiche del dottorato terrà il seminario dal titolo: Fire Safety Engineering principles
New approach to harness the annual energy potential of operational water networks.
07-06-2023
prof. Jean-Henry FERRASSE, Aix Marseille Université, CNRS, Centrale Marseille, M2P2, Marseille, France - The use of converted primary energy for heating and air conditioning currently represents 45.1% of French consumption. Water distribution networks, which are currently underutilized, could represent significant potential for the production of cold and heat due to the large quantity of water they transport. We aim to quantify the energy potential of these networks while maintaining their normal operation. Calculations of different power values are based on real-time determination of flow temperature and pressure. Interaction with the networks is achieved through heat exchangers optimized by minimizing entropy generation. This approach is applied to a cylindrical heat exchanger in dynamic mode. By incorporating the entropy generation terms resulting from temperature differences and pressure losses along the exchanger, the total entropy generation value is obtained during dynamic operation. In this configuration, the entropy generation related to the mixing of diverted water and network water is also taken into account. The total entropy generation is used as an objective function to optimize the geometry of the heat exchanger (with variable length and diameters) and fluid flows. Results from the application on an actual network are presented.
Dynamics and modeling of vehicle fires
19-07-2022
Luisa Giuliani (DTU, Denmark) - The risk associated to fire events has increased during the past years, as a consequence of a rapid development of new technologies and new materials, which has not been followed by an equivalent rapid upgrade of current fire safety regulations. Such risk is not limited to industrial processes and industries, but extends also to every-day premises such as residential buildings, car parks and infrastructures. With respect to the latter in particular, the increased size of cars, the use of more plastic materials, as well as the increasing numbers of alternative fueled vehicles (hydrogen and EV) has led to a significant increment of the average fuel load of cars and of the consequences of such fires. Such consequences are not limited to structural damages (such as in the recent collapse of Stavanger car park in 2020 or demolition of the Liverpool Echo Arena car park in 2018), but represent also significant hazards for people and environment. Two recent examples of this are the car and truck fire on the Euroferry Olympia, in February 2022, which caused the death of 8 passengers, and the EV fire on the Felicity Ace cargo vessel, which sank in the middle of the Atlantic Ocean with a highly pollutant cargo. This very recent event caught the attention of the media and re-ignited the debate on the risk of large car fires and the possible additional risk posed by EV in triggering or spreading the fire. This seminar will focus on the dynamics and modelling of vehicles fires, with the aim of providing practical and conservative tools to assess the fire of a car and the fire spread among cars and indicate measures to avoid large consequences of such fires.
Hydrogen applications related to fire safety engineering at DTU FireLab
15-09-2021
Nell'ambito delle attività formative del Dottorato in Processi Chimici per l'Industria e per l'Ambiente, il giorno 10 settembre 2021 il prof. Frank Markert (DTU, Copenhagen, Denmark) terrà un secondo seminario dal titolo: Introduction to fire and industrial risk assessment. Il seminario potrà essere fruito a distanza su piattaforma Google Meet.
Polyhydroxyalkanoates: The Exciting Journey to Develop Circular Bioeconomy Applications
19-07-2021
Seminar of prof. Josè Maria Lagaron, Spanish Council for Scientific Research, Spain. This presentation will gather the recent efforts carried out within our research group to characterise and develop applications for polyhydroxyalkanoates (PHA), using both commercial grades, and experimental materials developed within several EU projects using the technology of Mixed Microbial Cultures (MMC). The talk will provide first our current understanding of the structure-properties-processing relationship in PHA, and the existing challenges for their industrial implementation, then it will follow up with the technological strategies undertaking by our team to provide solutions, using the unique properties of PHA, to overcome existing hurdles in areas such as food packaging, adhesives, coatings and filtration. https://www.chem.uniroma1.it/notizie/polyhydroxyalkanoates-the-exciting-journey-to-develop-circular-bioeconomy-applications-seminario-di
Encapsulation of bioactive compounds and other polymeric applications via emerging technologies
19-07-2021
In this seminar Dr. Cristina Prieto (Spanish Council for Scientific Research, Spain) will present her main research line devoted to the encapsulation of bioactive compounds through emerging technologies based on supercritical fluids and electrohydrodynamic processing. In addition, she will exhibit the capabilities of the electrohydrodynamic technology for different polymeric applications such as biomedical, pharmaceutical, nutraceutical, filtration and food packaging, among others. https://www.chem.uniroma1.it/notizie/encapsulation-of-bioactive-compounds-and-other-polymeric-applications-via-emerging-technologies
Introduction to fire and industrial risk assessment
15-07-2021
Nell'ambito delle attività formative del Dottorato in Processi Chimici per l'Industria e per l'Ambiente, il giorno 15 luglio 2021 il prof. Frank Markert (DTU, Copenhagen, Denmark) terrà un seminario dal titolo: Introduction to fire and industrial risk assessment. Il seminario potrà essere fruito a distanza su piattaforma Google Meet.
LA SOCIETA’ SOSTENIBILE DEL FUTURO IL RUOLO DELL’ INGEGNERIA CHIMICA
29 gennaio 2019
La nostra società sta andando incontro ad una grande trasformazione, creando nuovi paradigmi. L’Energia, la Chimica e la Mobilità stanno cambiando notevolmente, muovendosi nella direzione di forme senza carbonio. Come sarà influenzata l’ingegneria chimica da tale cambiamento radicale? Il nostro obiettivo è offrire una panoramica delle tendenze più recenti e avanzate in questi temi e discuterli con esperti provenienti da diversi settori. L’evento mira a (i) mettere insieme scienziati dall’Università, Manager dell’industria, decision maker del mondo politico e delle aziende. ii) stimolare e creare un forum interdisciplinare per la discussione, (iii) Stimolare una forte interazione con l’obiettivo di raggiungere una visione più chiara circa i futuri campi di interesse per l’ingegneria chimica e per le professioni collegate.

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