Catalysts 2012, 2(3), 386-399; doi:10.3390/catal2030386

Co-Fe-Si Aerogel Catalytic Honeycombs for Low Temperature Ethanol Steam Reforming

1,2email, 1email, 3email and 1,2,* email
Received: 1 August 2012; in revised form: 6 September 2012 / Accepted: 7 September 2012 / Published: 19 September 2012
(This article belongs to the Special Issue Aerogel Catalyst)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Cobalt talc doped with iron (Fe/Co~0.1) and dispersed in SiO2 aerogel was prepared from silica alcogel impregnated with metal nitrates by supercritical drying. Catalytic honeycombs were prepared following the same procedure, with the alcogel synthesized directly over cordierite honeycomb pieces. The composite aerogel catalyst was characterized by X-ray diffraction, scanning electron microscopy, focus ion beam, specific surface area and X-ray photoelectron spectroscopy. The catalytic layer is about 8 µm thick and adheres well to the cordierite support. It is constituted of talc layers of about 1.5 µm × 300 nm × 50 nm which are well dispersed and anchored in a SiO2 aerogel matrix with excellent mass-transfer properties. The catalyst was tested in the ethanol steam reforming reaction, aimed at producing hydrogen for on-board, on-demand applications at moderate temperature (573–673 K) and pressure (1–7 bar). Compared to non-promoted cobalt talc, the catalyst doped with iron produces less methane as byproduct, which can only be reformed at high temperature, thereby resulting in higher hydrogen yields. At 673 K and 2 bar, 1.04 NLH2·mLEtOH(l)−1·min−1 are obtained at S/C = 3 and W/F = 390 g·min·molEtOH−1.
Keywords: hydrogen; aerogel; ethanol steam reforming; monolith; cobalt catalyst; iron catalyst
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MDPI and ACS Style

Domínguez, M.; Taboada, E.; Molins, E.; Llorca, J. Co-Fe-Si Aerogel Catalytic Honeycombs for Low Temperature Ethanol Steam Reforming. Catalysts 2012, 2, 386-399.

AMA Style

Domínguez M, Taboada E, Molins E, Llorca J. Co-Fe-Si Aerogel Catalytic Honeycombs for Low Temperature Ethanol Steam Reforming. Catalysts. 2012; 2(3):386-399.

Chicago/Turabian Style

Domínguez, Montserrat; Taboada, Elena; Molins, Elies; Llorca, Jordi. 2012. "Co-Fe-Si Aerogel Catalytic Honeycombs for Low Temperature Ethanol Steam Reforming." Catalysts 2, no. 3: 386-399.

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