Catalytic walls and micro-devices for generating hydrogen by low temperature steam reforming of ethanol

Casanovas, Albert; Domínguez, Montserrat; Ledesma, Cristian; López, Eduardo; Llorca, Jordi

doi:10.1016/j.cattod.2008.08.040

Cited by 54 publications

(35 citation statements)

References 26 publications

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“…For the activity curve of the Pd microreactor (MR-Pd), the result seems to indicate that there is a tendency for the CO conversion to slightly decrease at high temperatures (above 170ºC), which could be due, as previously observed for similar active phases [7] to the water-gas shift reactor becoming more relevant at high temperatures, as previously stated in the literature [27]. The enhanced performance of the microreactor with respect to the powder catalyst has been previously stated in the literature for several catalytic systems in microreactor configurations [11], [28], [29], [30]. In general, this enhanced microreactor behaviour is ascribed to mass and heat transfer processes favoured in the microchannels [4], [31], [27].…”

Section: Resultssupporting

confidence: 70%

Capillary microreactors based on hierarchical SiO2 monoliths incorporating noble metal nanoparticles for the Preferential Oxidation of CO

Miguel-García

Navlani‐García

García-Aguilar

et al. 2015

Chemical Engineering Journal

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Novel hierarchical SiO 2 monolithic microreactors loaded with either Pd or Pt nanoparticles have been prepared in fused silica capillaries and tested in the PreferentialOxidation of CO (PrOx) reaction. Pd and Pt nanoparticles were prepared by the reduction by solvent method and the support used was a mesoporous SiO 2 monolith prepared by a well-established sol-gel methodology. Comparison of the activity with an equivalent powder catalyst indicated that the microreactors show an enhanced catalytic behaviour (both in terms of CO conversion and selectivity) due to the superior mass and heat transfer processes that take place inside the microchannel. TOF values at low CO conversions have been found to be ~2.5 times higher in the microreactors than in the powder catalyst and the residence time seems to have a noticeable influence over the selectivity of the catalysts designed for this reaction. The Pd and Pt flexible microreactors developed in this work have proven to be effective for the CO oxidation reaction both in the presence and absence of H 2 , standing out as a very interesting and 1 Corresponding author. Fax: +34 965 903454 E-mail address: a.berenguer@ua.es (Á. Berenguer) suitable option for the development of CO purification systems of small dimensions for portable and on-board applications.

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Section: Resultssupporting

confidence: 70%

Capillary microreactors based on hierarchical SiO2 monoliths incorporating noble metal nanoparticles for the Preferential Oxidation of CO

Miguel-García

Navlani‐García

García-Aguilar

et al. 2015

Chemical Engineering Journal

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“…Partial ethanol is combusted in the other side of the channel to supply heat required for reforming. Such design provides many technical advantages including rapid mass and heat transport due to large surface area to volume ratios, lower pressure drop, good structural and thermal stability, and precise control of reaction conditions leading to higher hydrogen yield [159,160]. The main challenges faced by this technique before it becomes final commercialization are system integration, reactor fabrication process, and catalyst regeneration or replacement.…”

Section: Future Development Directionsmentioning

confidence: 99%

Catalytic Hydrogen Production from Bioethanol

Song¹

2012

Bioethanol

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“…With the resultant geometry, the specific contact area increased with respect to conventional microreactors up to fabulous values of 10 5 -10 6 m 2 /m 3 . A ∼0.01 cm 3 unit comprising >10 6 channels was successfully tested for ESR under residence times <1 s, rendering specific production rates exceeding 50 NL of H 2 per mL of liquid fed and cm 3 of reactor [5,6]. The low-temperature reforming of ethanol offers a nice solution for supplying hydrogen to portable fuel cells due to its high volumetric energy density, low cost, safety, and easy transportation [7].…”

Section: Introductionmentioning

confidence: 99%