Bio-ethanol steam reforming and autothermal reforming in 3- m channels coated with RhPd/CeO2 for hydrogen generation
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Tipus de documentArticle
Data publicació2013-02
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Abstract
A silicon micromonolith of 7 mm diameter and 0.2 mm length containing 1.5 million regular channels with a diameter of 3.3 μm was used for obtaining hydrogen through ethanol or bio-ethanol steam reforming (ESR) and oxidative steam reforming (OSR). The microchannels were coated with RhPd/CeO2 catalyst by a two-step method. First a CeO2 layer of ca. 100 nm thickness was deposited from cerium methoxyethoxide over a SiO2 layer, which was previously grown over the silicon microchannels by oxidation. Then, noble metals were grafted over the CeO2 support from chloride precursors. The unit was successfully tested for hydrogen production, achieving hydrogen rates of 180 LH2 cmR−3 for the steam reforming of bio-ethanol at 873 K, S/C = 2 and 0.009 s contact time. Reaction yields of 3.8 and 3.7 mol hydrogen generated per mol ethanol in feed were measured for ESR and OSR, respectively. A performance comparison was performed with a conventional cordierite monolith with the same catalyst formulation. Results show for the silicon microreactor an outstanding improvement of the specific hydrogen production rate, operating at considerably reduced residence times, due to the increase in contact area per unit volume.
CitacióDivins, N. [et al.]. Bio-ethanol steam reforming and autothermal reforming in 3- m channels coated with RhPd/CeO2 for hydrogen generation. "Chemical engineering and processing", Febrer 2013, vol. 64, p. 31-37.
ISSN0255-2701
Versió de l'editorhttp://www.sciencedirect.com/science/article/pii/S025527011200222X
Col·leccions
- MNT - Grup de Recerca en Micro i Nanotecnologies - Articles de revista [346]
- GREENER - Grup de recerca d'estudis energètics i de les radiacions - Articles de revista [178]
- INTE - Institut de Tècniques Energètiques - Articles de revista [285]
- Departament d'Enginyeria Electrònica - Articles de revista [1.723]
Fitxers | Descripció | Mida | Format | Visualitza |
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Rodriguez_Vega_CEP6207_Bio-inspired_OK DRAC.pdf | 935,8Kb | Accés restringit |