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ME - Resumos em livros de actas

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http://hdl.handle.net/10400.9/286

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Browsing ME - Resumos em livros de actas by Field of Science and Technology (FOS) "Engenharia e Tecnologia::Engenharia Química"

Now showing 1 - 7 of 7
  • Enhancing Corrosion Resistance of Al-Mg Alloys through Biomineralization [Resumo]
    Publication . Marques, Maria João; Fori, Benoit; Mercier, Dimitri; Seyeux, Antoine; Zanna, Sandrine; Marcus, Philippe; BASSEGUY, Regine
    ABSTRACT: In recent decades, new emerging microbiological technologies have been studied, based on the recognition that microorganisms can inhibit corrosion by different mechanisms, the so-called MICI (microbiologically influenced corrosion inhibition), opening up different lines of research. In this context, biomineralization has been attracting the attention of researchers, with an increasing number of studies showing that different types of mineralized layers formed on metal surfaces can reduce the risk of corrosion.
    2024-09Conference object Open access Show more
  • Enhancing Proton Conductivity of SPEEK Based Membranes by Incorporation Graphene Oxide / Bisphosphonic acid dopant [Resumo]
    Publication . Teixeira, Fatima; Teixeira, António Paulo Silva; Rangel, Carmen M.
    ABSTRACT: The most commercially successful membrane for applications in fuel cell and electrolyzers, perfluorinated sulfonic NafionR, exhibits relevant performance limitations due to its dependence on water content with consequent proton mobility restrictions, environmental concerns and very high cost. Poly(etheretherketone) (SPEEK) polymer appears as a versatile non-fluorinated alternative for a low-cost and a more environmentally friendly membrane. Our previous studies showed that the incorporation of biphosphonic acid dopants (BPs) into the mentioned polymeric matrices, improves membrane proton conduction and durability1-5. In this work, we prepared and evaluated new doped SPEEK membranes using graphene oxide (GO) with bisphosphonic acid functionalities as dopant (GOBP), anticipating superior membranes properties, including proton conductivity.
    2025-07Conference object Open access Show more
  • Green Catalytic Transformation of CO₂ to Syngas Using Aerogels [Resumo]
    Publication . Paninho, A. B.; Messias, Sofia; Fernandes, I.; Rangel, Carmen M.; Nunes, A. V. M.; Branco, Luis; Martins, Rodrigo; Mendes, Manuel Joao; Machado, Ana
    2025-09Conference object Open access Show more
  • La biominéralisation comme bioinspiration pour le développement de solutions anti-corrosion [Resumo]
    Publication . BASSEGUY, Regine; Marques, Maria João
    RÉSUMÉ: Dans le domaine de la corrosion, la nature se révèle être une source d’inspiration pour développer de nouveaux concepts de protection verts. En effet, il est largement reconnu que les micro-organismes sont capables non seulement d’accélérer la orrosion mais ils peuvent également l'inhiber et/ou protéger les matériaux qu’ils colonisent [1]. Ce constat a ainsi conduit à proposer des stratégies à base microbienne pour l'inhibition de la corrosion des métaux. En particulier, le processus de biominéralisation à la surface des matériaux, tels que les pierres, le béton et divers métaux, a récemment été considéré comme une nouvelle approche respectueuse de l'environnement pour produire des couches protectrices [2-3]. Jusqu’à peu, la majorité des publications concernaient les aciers, matériaux historiquement utilisés dans les infrastructures. Au cours des dernières années, de nouveaux matériaux tels que les alliages d'aluminium, sont apparus sur le marché comme des alternatives possibles. Dans le cas spécifique de l'alliage Al-Mg, souvent utilisé dans les applications marines, peu d'études ont évalué l'influence de la biominéralisation sur la corrosion [4-6]. L'objectif de cette présentation est de montrer, à travers deux études de cas, comment la précipitation minérale influencée par l’activité microbienne sur les matériaux métalliques peut être envisagée comme une nouvelle approche pour le développement de solutions anti-corrosion.
    2024-11Conference object Open access Show more
  • New membranes for CO2 electrochemical reduction {Resumo]
    Publication . Teixeira, Fatima; Teixeira, António Paulo Silva; Messias, Sofia; Martins, Rodrigo; Mendes, Manuel Joao; Machado, Ana; Rangel, Carmen M.
    2025-06Conference object Open access Show more
  • New SPEEK Membranes Modified with Bisphophonate Dopants [Resumo]
    Publication . Teixeira, Fatima; Teixeira, António Paulo Silva; Rangel, Carmen M.
    ABSTRACT: ustainable emerging energy technologies are pivotal to a decarbonized society that still continuously increases its energy demands. Fuel cells and eletrolyzers are part of these promising sustainable technologies, but they still depend on several factors, especially on their membranes. These are a key component acting as a separator, between their different materials and electrolytes of different devices' compartments, and as a selective ion-exchange barrier, controlling the ion flow and species permeability. Sulfonated poly(etheretherketone) (SPEEK) polymer is a versatile non-fluorinated alternative, as a low-cost and more environmentally friendly membrane, to the most commercially successful membrane based on the perfluorinated sulfonic Nafion®. Also, our previous studies showed that the incorporation of BPs dopants into the polymeric matrices, modifies the properties of the doped membranes, including their proton conduction and durability.
    2025-09Conference object Open access Show more
  • Solar Electrochemical CO2 Reduction to Syngas [Resumo]
    Publication . Messias, Sofia; Paninho, A. B.; Nunes, Daniela; Rangel, Carmen M.; Nunes, A. V. M.; Branco, Luis; Martins, Rodrigo; Mendes, Manuel Joao; Machado, Ana
    2025-06Conference object Open access Show more