Título:
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Standalone ethanol micro-reformer integrated on silicon technology for onboard production of hydrogen-rich gas
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Autor/a:
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Pla, Dolors; Salleras, M.; Morata García, Alejandro; Garbayo, I.; Gerboles, M.; Sabaté, Nuria; Divins, N. J.; Casanovas Hoste, Adrià; Llorca Piqué, Jordi; Tarancón Rubio, Albert
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Otros autores:
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Institut de Recerca en Energía de Catalunya; Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques; Universitat Politècnica de Catalunya. Departament d'Enginyeria Química; Universitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia |
Abstract:
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A novel design of a silicon-based micro-reformer for onboard hydrogen generation from ethanol is presented in this work. The micro-reactor is fully fabricated with mainstream MEMS technology and consists of an active low-thermal-mass structure suspended by an insulating membrane. The suspended structure includes an embedded resistive metal heater and an array of ca. 20k vertically aligned through-silicon micro-channels per square centimetre. Each micro-channel is 500 mu m in length and 50 mu m in diameter allowing a unique micro-reformer configuration that presents a total surface per projected area of 16 cm(2) cm(-2) and per volume of 320 cm(2) cm(-3). The walls of the micro-channels become the active surface of the micro-reformer when coated with a homogenous thin film of Rh-Pd/CeO2 catalyst. The steam reforming of ethanol under controlled temperature conditions (using the embedded heater) and using the micro-reformer as a standalone device are evaluated. Fuel conversion rates above 94% and hydrogen selectivity values of ca. 70% were obtained when using operation conditions suitable for application in micro-solid oxide fuel cells (micro-SOFCs), i.e. 750 degrees C and fuel flows of 0.02 ml(L) min(-1) (enough to feed a one watt power source). |
Materia(s):
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-Àrees temàtiques de la UPC::Energies -Microreactors -Microreactors |
Derechos:
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Tipo de documento:
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Artículo - Versión publicada Artículo |
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