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Topics in Catalysis

, Volume 61, Issue 15–17, pp 1734–1745 | Cite as

New Insights into the Role of the Synthesis Procedure on the Performance of Co-Based Catalysts for Ethanol Steam Reforming

  • Ilenia Rossetti
  • Barbara Bonelli
  • Gianguido Ramis
  • Elnaz Bahadori
  • Roberto Nasi
  • Antonio Aronne
  • Serena Esposito
Original Paper
  • 95 Downloads

Abstract

Co/SiO2 catalysts with two Co contents of 10 and 30 mol% were prepared and used in ethanol steam reforming. With the aim of tailoring the materials features by varying the synthesis parameters, two different sol–gel procedures were designed, namely a modified hydrolytic alkoxide sol–gel synthesis and a (non-ionic) surfactant assisted one. Effect of the synthesis procedure on the physico-chemical properties of the prepared catalysts is in the focus of the present investigation. The obtained Co/SiO2 catalysts were characterized by means of X-rays powder diffraction, diffuse reflectance UV–Vis spectroscopy, N2 adsorption/desorption isotherms at − 196 °C, field emission scanning electron microscopy equipped with energy dispersive X-ray probe, temperature-programmed reduction and CO adsorption at nominal − 196 °C as followed by IR spectroscopy. The oxidation state of Co species within the SiO2 matrix was affected by the synthesis method. In particular, the non-ionic surfactant, acting both as pores template and as chelating agent of Co ions during the synthesis, prevented the formation of Co3O4 phase leading to a higher dispersion and higher temperature reducibility of Co species with respect to samples with same Co content synthesized without surfactant. The fine balance between Co dispersion and reducibility was the fundamental parameter governing the activity of the Co/SiO2 catalysts in terms of H2 production, CO/CO2 ratio and C balance during ethanol steam reforming.

Keywords

Cobalt catalysts Porous SiO2 Sol–gel synthesis Non-ionic surfactants Ethanol steam reforming 

Notes

Acknowledgements

Authors thank Dr. Mauro Raimondo (Politecnico di Torino, Italy) for FESEM measurements.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Ilenia Rossetti
    • 1
  • Barbara Bonelli
    • 2
  • Gianguido Ramis
    • 3
  • Elnaz Bahadori
    • 1
  • Roberto Nasi
    • 2
  • Antonio Aronne
    • 4
  • Serena Esposito
    • 5
  1. 1.Dipartimento di ChimicaUniversità Degli Studi di Milano, INSTM Unit Milano-Università and CNR-ISTMMilanoItaly
  2. 2.Dipartimento di Scienza Applicata e Tecnologia, Politecnico di TorinoINSTM Unit of Torino-PolitecnicoTorinoItaly
  3. 3.Dipartimento di Ingegneria Civile, Chimica e AmbientaleUniversità degli Studi di Genova and INSTM Unit GenovaGenovaItaly
  4. 4.Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione IndustrialeUniversità degli Studi di Napoli Federico IINapoliItaly
  5. 5.Dipartimento di Ingegneria Civile e Meccanica and INSTM UnitUniversità degli Studi di Cassino e del Lazio MeridionaleCassinoItaly

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