Effect of the Preparation Method on Co/Al2O3 Catalyst Applied to Ethanol Steam Reforming Reaction Production of Hydrogen

DOI: 10.4236/mrc.2012.13007   PDF   HTML     3,285 Downloads   7,020 Views   Citations

Abstract

Alumina supported cobalt catalysts were prepared, characterized and applied in ethanol steam reforming for hydrogen production. The support and the supported catalysts were prepared, respectively, by the solvothermal and precipitation, impregnation and deposition-precipitation methods. The cobalt was added by impregnation and deposition-precipitation in the Al2O3 supports using a Co(NO3)2·6H2O solution. The solids were characterized, Temperature-Programmed Re-duction with H2 (RTP-H2), X-Ray Diffraction (DRX), BET Nitrogen Adsorption and Temperature Programmed Oxida-tion (TPO). The results indicated that the preparation method and the treatment conditions of samples were appropriate for obtaining the wanted compounds. Co3O4 phase was verified for all catalysts through analyses of DRX and RTP-H2 results. Catalytic tests were performed by varying the temperature from 450?C to 600?C, with water: ethanol molar ratio of 3:1. The ethanol conversion was superior of 99%, with greater hydrogen yield at 600℃. The lower carbon deposition was observed in catalysts prepared with solvothermal/deposition-precipitation methods at 450℃.

Share and Cite:

S. Garcia and J. Assaf, "Effect of the Preparation Method on Co/Al2O3 Catalyst Applied to Ethanol Steam Reforming Reaction Production of Hydrogen," Modern Research in Catalysis, Vol. 1 No. 3, 2012, pp. 52-57. doi: 10.4236/mrc.2012.13007.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1] R. N. Das, A. Bandyopadhyay and S. Bose, “Nanocrystalline-Al2O3 Using Sucrose,” Journal of the American Ceramic Society, Vol. 84, No. 10, 2001, pp. 2421-2423. doi:10.1111/j.1151-2916.2001.tb01024.x
[2] B. Zhang, X. T. Tang, Y. Li, W. Cai, Y. Xu and W. Shenn, “Steam Reforming of Bio-Ethanol for the Production of Hydrogen over Ceria-Supported Co, Ir e N,” Catalysis Communications, Vol. 7, No. 2006, pp. 367-372.
[3] V. Fierro, O. Akdim, H. Provendier and C. Miroda-Tos, “Oxidative Reforming of Biomass Derived Ethanol for Hydrogen Production in Fuel Cell Applications,” Catalysis Today, Vol. 75, No. 1-4, 2002, pp. 141-144. doi:10.1016/S0920-5861(02)00056-1
[4] A. N. Fatsikostas and X. E. Verykios, “Production of Hydrogen for Fuel Cells by Reformation of Bio-Ethanol over Ni- and Ru- Based Catalysts,” Proceedings of the International Hydrogen Energy Congress and Exhibitions, 2005, pp.
[5] N. Srisiriwat, A. Therdthianwong and S. Therd-Thianwong, “Sustainable Energy and Environment (SEE 2008),” The 2nd Joint International Conference, Thailand, 2008, pp.
[6] T. Ioannides and S. Neophytides, “Efficiency of a Solid Polymer Fuel Cell Operating on Ethanol,” Journal of Power Sources, Vol. 91, No. 2, 2000, pp. 150-156. doi:10.1016/S0378-7753(00)00473-0
[7] E. C. Wanat, K. Venkataraman and L. D. Schimidt, “Steam Reforming and Water-Gas Shift of Ethanol on Rh and Rh-Ce Catalysts in a Catalytic Wall Reactor,” Applied Catalysis A: General, Vol. 276, No. 1-2, 2004, pp. 155-162. doi:10.1016/j.apcata.2004.08.001
[8] T. V. Reche, “Disserta??o (Mestrado em Físico-Química),” Instituto de Química de S?o Paulo, S?o Carlos, 2004.
[9] P. S. Santos, P. K. Kiyohara and H. S. Santos, “Efeitos Causados Pela Mistura de Gasolina e. álcool em,” Bol. Téc. Petrobrás, Vol. 41, No. 3-4, 1998, pp. 45-63.
[10] M. S. Batista, R. K. S. Santos, E. M. Assaf, J. M. Assaf, and S. Ticianelly “Characterization of the Activity and Stability of Supported Cobalt Catalysts for the Steam Reforming of Ethanol,” Journal of Power Sources, Vol. 124, No. 1, 2003, pp. 99-103. doi:10.1016/S0378-7753(03)00599-8
[11] P. Arnoldy and J. A. Moulinijin, “Temperature-Programmed Reduction of CoO/AI2O3 Catalysts,” Journal of Catalysis, Vol. 93, No. 1, 1985, pp. 38-54. doi:10.1016/0021-9517(85)90149-6
[12] R. K. S. Santos, M. S. Batista, E. M. Assaf and J. M. Assaf, “Effect of Metal Content in Catalysts Co/Al2O3 Applied to the Reaction of Steam Reforming of Ethanol New Chemical,” Química Nova, Vol. 28, No. 4, 2005, pp. 587-590. doi:10.1590/S0100-40422005000400006
[13] B. Varghese, Y. Zahang, L. Daí, V. B. C. Tan, C. T. Lim and C. Sow, “Structure-Mechanical Property of Individual Cobalt Oxide Nanowires,” Nano Letters, Vol. 8, No. 10, 2008, pp. 3226-3232. doi:10.1021/nl801555d
[14] A. Kaddouri and C. Mazzocchia, “A Study of the Influence of the Synthesis Conditions upon the Catalytic Properties of Co/SiO2 or Co/Al2O3 Catalysts Used for Ethanol Steam Reforming,”Catalysis Communications, Vol. 5, No. 6, 2004, pp. 339-345. doi:10.1016/j.catcom.2004.03.008
[15] J. Llorca, N. Homs, J. Sales and P. L. Piscina, “Efficient Production of Hydrogen over Supported Cobalt Catalysts from Ethanol Steam Reforming,” Journal of Catalysis, Vol. 209, No. 2, 2002, pp. 306-317. doi:10.1006/jcat.2002.3643
[16] S. Cavallaro, N. Mondello and S. Freni, “Hydrogen Produced from Etanol Reforming Molten Carbonate Fuel Cell,” Journal of Power Sources, Vol. 102, No. 1-2, 2001, pp. 198-204. doi:10.1016/S0378-7753(01)00800-X

  
comments powered by Disqus

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.