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Avoiding surface instability and slurry jamming in simultaneous multilayer coating of structured particulate films / J. Alex Lee in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)
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Titre : Avoiding surface instability and slurry jamming in simultaneous multilayer coating of structured particulate films Type de document : texte imprimé Auteurs : J. Alex Lee, Auteur ; Aaron Kessman, Auteur ; David Shackleford, Auteur ; Martin Z. Bazant, Auteur ; Brian Barry, Auteur ; Courtland Chapman, Auteur ; Jeff Peet, Auteur Année de publication : 2022 Article en page(s) : p. 131–142 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Piles à combustible
Revêtements multicouchesTags : 'Revêtement multicouche' 'Glissière 'Emplacement double couche' Instabilité Boue Aqueux 'Système miscible' 'Épaississement par cisaillement' Marangoni SOFC 'Pile à combustible' Diffusion Index. décimale : 667.9 Revêtements et enduits Résumé : Simultaneous multilayer coating techniques are widely known, but their industrial application remains limited to narrow market sectors. One barrier to adoption may be the mismatch between industries that are familiar with such processes but have no need, and industries that have need but are not familiar. Moreover, there are application-specific technical challenges to developing multilayer-coating processes. In this article, we describe our resolution of two specific issues in simultaneous multilayer coating of all-aqueous highly loaded slurries for new and emerging energy applications. The first issue is particle jamming (associated with shear-thickening) of the highly loaded slurries in the die internals, which we alleviated by adding small amounts of viscosity modifiers without reducing the solid loading. The second issue is a Marangoni-driven surface instability that resembles top layer de-wetting, which we solved by carefully selecting surfactants to tune the dynamic surface tensions of each slurry. Both issues were resolved early in a step-wise development, saving significant development cost which in our case was driven by expensive materials. Note de contenu : - SLURRY JAMMING ASSOCIATED WITH SHEAR-THICKENING : Relevant literature on shear-thickening - Elimination of shear-thickening and jamming - Discussion of slurry jamming and rheology
- SURFACE INSTABILITY RESEMBLING TOP LAYER DE-WETTING : Spreading and the surface tension grading rule - Marangoni-driven self-thinning film flows - Relationship between surface tension grading and Marangoni instability - The role of dynamic surface tension in the Marangoni instability - Elimination of surface instability in simultaneous multilayer coating - Discussion on DST grading and mechanisms of multilayer coating instability
- Table 1 : Reformulation attempts to suppress shear-thickening
- Table 2 : Equilibrium surface tensions with air (EST) of incumbent and reformulated slurries’ supernatants. Measured by Biolin Attension Theta tensiometer at 22°C
- Table 3 : Comparison of EST and DST at different surface ages for different surfactants. Parentheses indicate difference from the value of S5DOI : https://doi.org/10.1007/s11998-021-00542-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00542-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37151
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 1 (01/2022) . - p. 131–142[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23313 - Périodique Bibliothèque principale Documentaires Disponible Economic viability of using biogas from tannery wastes in molten carbonate fuel cells / Albert Castell in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 3 (05-06/2010)
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Titre : Economic viability of using biogas from tannery wastes in molten carbonate fuel cells Type de document : texte imprimé Auteurs : Albert Castell, Auteur ; Marc Medrano, Auteur ; Luisa F. Cabeza, Auteur ; Josep Maria Morera, Auteur ; Esther Bartoli, Auteur Année de publication : 2010 Article en page(s) : p. 93-97 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Recyclage (déchets, etc.)
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TannageTags : 'Déchets de tannerie' 'Production biogaz' 'Pile à combustible' Index. décimale : 665.77 Production de gaz industriels à partir du charbon, du pétrole, des déchets Résumé : Wastes from tanneries present a good opportunity to produce biogas anduse it in high temperature fuel cells for combined heat and power systems. Biogas is considered a renewable fuel, domestically produced and free of carbon emissions, while molten carbonate fuel cells are ultra-clean and highly efficient power generators. In this paper, we study the economic viability of a fuel celle (considering capacities from 300kW to 1200kW) operating on biogas. The results are based on Spanish legislation, which establishes a special feed-in tariff bor biogas and cogeneration. Paybacks range from 5.7 to 8.5 years depending on the fuel cell capacity. Due to the high investment and operating and maintenance cost, the Spanish feed-in tariff for cogeneration using biogas is not enough to make the project economically viable in a short-term. Further fuel celle price reduction and longer lifetime as well as new government subsidies are required. En ligne : https://drive.google.com/file/d/147aIu4za3X2Pe86_yi3Aut81HFGb7Et-/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9621
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 94, N° 3 (05-06/2010) . - p. 93-97[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012255 - Périodique Bibliothèque principale Documentaires Disponible Latent acid catalysts for process control of phenolics / Graham Murray in JEC COMPOSITES MAGAZINE, N° 61 (12/2010)
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Titre : Latent acid catalysts for process control of phenolics Type de document : texte imprimé Auteurs : Graham Murray, Auteur Année de publication : 2010 Article en page(s) : p. 57-58 Langues : Anglais (eng) Tags : Phénoplaste 'Pile combustible' Application 'Pressage à chaud' Résol Polycondensation 'Matériau composite' 'Contrôle de processus' Index. décimale : 668.4 Plastiques, vinyles Résumé : For composite products where fire safety is paramount and high temperature resistance is important, the polymer of choice is phenolic. Phenolic composites are usually produced using resole resins, which are polymerised by the addition of strong acid catalysts or by hot pressing. Resole resins however, can be highly reactive when mixed with strong acids and dangerous exothermic reactions can result. The reactivity of an acid catalysed resole can be so rapid that the processing becomes impossible. This often means the pre-mixing of resin and catalyst must be done immediately before use, limiting applications to those where compounding is close to production operations because shipping and storage is problematic. Finding an effective latent acid catalyst to control polymer chemistry solves many process issues. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13777
in JEC COMPOSITES MAGAZINE > N° 61 (12/2010) . - p. 57-58[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012656 - Périodique Bibliothèque principale Documentaires Disponible