Título:
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First use of macroporous silicon loaded with catalyst film for a chemical reaction: a microreformer for producing hydrogen from ethanol steam reforming
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Autor/a:
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Llorca Piqué, Jordi; Casanovas Grau, Albert; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón
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Otros autores:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Química; Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia; Universitat Politècnica de Catalunya. MNT - Grup de Recerca en Micro i Nanotecnologies |
Abstract:
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Macroporous silicon with millions of parallel microchannels per square centimeter can be used as a micromonolithic support for high-speed catalysis in miniaturized systems, opening a new and exciting field of research and application. We used macroporous silicon membranes with >106 parallel microchannels with a diameter of 3.3 µm and depth/width ratio >60 as microreactors for the generation of hydrogen through the steam reforming of ethanol. The microchannels walls were coated with a thin layer of Co3O4–ZnO catalyst by a complexation–decomposition method, resulting in a specific inner surface of 105–106 m2¿m-3. A constant flow of 20 µL¿s-1 H2 (0.054 mmol¿min-1 H2) was obtained from a liquid water–ethanol mixture at 773 K with a steam-to-carbon ratio of S/C = 3 and LHSV = 2 × 104 h-1 (0.1 mL¿min-1). The turnover frequency under these conditions was ca. 1.1 s-1, based on surface Co atoms. |
Abstract:
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Peer Reviewed |
Materia(s):
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-Àrees temàtiques de la UPC::Física::Física de l'estat sòlid::Semiconductors -Silicon -Macroporous silicon -Micromonolith -Hydrogen -Ethanol -Steam reforming -Silici |
Derechos:
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Tipo de documento:
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Artículo - Versión publicada Artículo |
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