يعرض 1 - 20 نتائج من 9,820 نتيجة بحث عن '"caused"', وقت الاستعلام: 2.51s تنقيح النتائج
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    Dissertation/ Thesis
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    Academic Journal
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    Dissertation/ Thesis

    المؤلفون: Costafreda Aumedes, Sergi

    المساهمون: University/Department: Universitat de Lleida. Departament d'Enginyeria Agroforestal

    Thesis Advisors: Vega García, Cristina, Comas Rodríguez, Carles

    المصدر: TDX (Tesis Doctorals en Xarxa)

    وصف الملف: application/pdf

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    Conference

    المؤلفون: Piot, Christina

    المساهمون: Lilith - Liège, Literature, Linguistics - ULiège, BE, Savoirs, Texte, Langage (STL), UMR8163 - CNRS (Université de Lille)

    المصدر: GESPIN, Nijmegen, Netherlands [NL], 13/09/2023-15/09/2023

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    Conference

    المؤلفون: Piot, Christina

    المساهمون: Lilith - Liège, Literature, Linguistics - ULiège, Savoirs, Texte, Langage (STL), UMR8163 - CNRS (Université de Lille)

    المصدر: 16th International Cognitive Linguistics Conference, Düsseldorf, Germany [DE], 7-11/08/2023

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    Academic Journal
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    Academic Journal
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    Academic Journal

    مصطلحات موضوعية: Perovskite-based electrodes have gained interest as alternatives to Ni-cermet fuel electrodes in solid oxide electrolysis cells SOECs. This study investigates strontium-iron-titanate STF as a potential all-ceramic fuel electrode for SOECs. The chemical stability of pure STF during SOEC operating conditions at open circuit voltage OCV and the chemical reactivity between STF and yttria-stabilized zirconia YSZ under manufacturing and operation conditions are analyzed. The pure STF appears to be quite stable during SOEC operation. However, the STF and YSZ electrolyte powder mixture shows chemical interaction during manufacturing and operation conditions, confirming the need for a barrier layer between those two materials. Furthermore, the electrochemical performance of electrolyte-supported symmetrical and full cells is tested at different temperatures 650–800 °C and steam concentrations 3–90 % H2O. A mid-term degradation test in steam electrolysis operation for ca. 1700 h is carried out under thermoneutral conditions i = −0.43 A cm−2 at 800 °C in 50 % H2O + 50 % H2. A low Rp degradation rate 0.162 Ω cm2 kh−1 for the investigated cell containing STF fuel electrode is obtained. However, the increasing ohmic resistance during the operational period caused an overpotential increase with a rate of 195 mV kh−1. Finally, post-test analyses showed sufficient chemical stability, representing STF as a potential candidate as fuel electrode in SOECs

    وصف الملف: PDF

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    Academic Journal
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    Academic Journal
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    Academic Journal
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    Academic Journal
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    Academic Journal
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    Academic Journal
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    Review
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    Academic Journal
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    Academic Journal
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    Academic Journal