El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado. / This article proposes a mechanical development of a dry cell in order to obtain HHO through water electrolysis. Calculations and technical specifications of the materials used for implementation are supported by mathematical, physical and chemical formulas and theories (Faraday´s Law, electrolysis process and mechanical design). The importance of mechanical design is focused on achieving efficient use of the energy provided to the cell that allows the H2 and O2 molecules to be separated without overheating the cell, evaporating the water, loss of current due to the geometry of the electrodes (Foucault Current). Moreover, choosing materials for proper implementation and physical robustness is mandatory. In addition, the mechanical design is not justified in different articles. Nevertheless, the mechanical design of the cell and the efficiency in the production of HHO are related. Therefore, the mechanical design and the calculations were performed, as well as the construction of the dry cell to obtain HHO. The results of the implementation and production were placed and compared with what theoretically the dry cell should produce from the law of Faraday. Finally, the volumetric flow of HHO obtained was 2.70 L per minute. It means a production efficiency of 98.68%. It is higher than the majority of the dry cells. / Revisión por pares

Le fer est l'un des rares métaux qui ne soit pas produit industriellement par électrolyse. Pour aider au développement d'un tel procédé pour l'acier, l'électrolyse des oxydes de fer en milieu sodique est examinée, selon deux approches. La première démarche consiste en l'étude expérimentale du mécanisme réactionnel. L'électrochimie des ions indique qu'il est possible de produire du métal par électrodéposition en milieu alcalin. Parallèlement, l'étude de la réduction d'une particule d'oxyde hématite révèle qu'elle subit, lors de sa conversion en fer métallique, une transformation macroscopique en phase solide. Les analyses démontrent la formation de magnétite comme intermédiaire réactionnel. La seconde démarche est dédiée à la production du fer métallique, par électrolyse d'une suspension de particules d'oxyde dans diverses configurations de cellules. L'incidence des paramètres de procédé a été établie et permet de proposer des éléments de conception d'une cellule industrielle / Iron is one of the few metals which is not industrially produced by electrolysis. The electrowinning of iron metal from its oxides in alkaline solution has been studied to develop such an ironmaking route. Two approaches have been adopted. The first one concerns the evaluation of the reaction mechanism. The study of iron ions electrochemistry in alkaline media shows that the electrodeposition of iron metal is possible. The study of a single iron oxide particle reduction reveals that a reaction of the hematite solid phase is possible. The analysis of a partially converted particle proves that magnetite is formed as an intermediate. The second field of study is dedicated to the production of iron metal in various electrochemical cells, using a suspension electrolysis process. The influence of the key operating parameters is established to assess the possible scale-up. All these elements are gathered to propose the main features of an industrial cell dedicated to the reaction