Tungsten effect over co-hydrotalcite catalysts to produce hydrogen from bio-ethanol

J. L. Contreras, M. A. Ortiz, G. A. Fuentes, R. Luna, J. Salmones, B. Zeifert, L. Nuno, A. Vazquez

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A great stabilization effect of tungsten over the Co-hydrotalcite catalysts to produce H2 from ethanol in steam reforming was found. The catalysts were characterized by N2 physisorption (BET area), X-ray diffraction, Infrared ,Raman and UV-vis spectroscopies. Catalytic evaluations were performed in a fixed bed reactor using a water/ethanol mol ratio of 4, at 450°C, and the W concentration studied was from 0.5 to 3 wt%. As W concentration increases, the intensity of crystalline reflections of the Co-hydrotalcite catalysts decreases. There were found porous with the shape of parallel layers with a monomodal mesoporous distribution. Superficial chemical groups as: - OH, H 2O, Al-OH, Mg-OH, W-O-W and CO3 2- were found by infrared spectroscopy. Catalyst with low amounts of W (1%) showed both, the highest H2 production and the best catalytic stability. The smallest pore volume of this catalyst could be related with long residence times of ethanol in the pores. Tungsten promoted the conversion for the Co-hydrotalcite catalysts. The reaction products were: H2, CO2, CH3CHO, CH4 and C2H4 and the catalysts did not produce CO. © J. New Mat. Electrochem. Systems.
Original languageAmerican English
Pages (from-to)253-259
Number of pages227
JournalJournal of New Materials for Electrochemical Systems
StatePublished - 1 Dec 2010
Externally publishedYes

Fingerprint

hydrotalcite
Tungsten
Hydrogen
Ethanol
Catalysts
Spectrum Analysis
Steam
Carbon Monoxide
X-Ray Diffraction
Water
Physisorption
Steam reforming
Ultraviolet spectroscopy
Reaction products
Infrared spectroscopy

Cite this

Contreras, J. L., Ortiz, M. A., Fuentes, G. A., Luna, R., Salmones, J., Zeifert, B., ... Vazquez, A. (2010). Tungsten effect over co-hydrotalcite catalysts to produce hydrogen from bio-ethanol. Journal of New Materials for Electrochemical Systems, 253-259.
Contreras, J. L. ; Ortiz, M. A. ; Fuentes, G. A. ; Luna, R. ; Salmones, J. ; Zeifert, B. ; Nuno, L. ; Vazquez, A. / Tungsten effect over co-hydrotalcite catalysts to produce hydrogen from bio-ethanol. In: Journal of New Materials for Electrochemical Systems. 2010 ; pp. 253-259.
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abstract = "A great stabilization effect of tungsten over the Co-hydrotalcite catalysts to produce H2 from ethanol in steam reforming was found. The catalysts were characterized by N2 physisorption (BET area), X-ray diffraction, Infrared ,Raman and UV-vis spectroscopies. Catalytic evaluations were performed in a fixed bed reactor using a water/ethanol mol ratio of 4, at 450°C, and the W concentration studied was from 0.5 to 3 wt{\%}. As W concentration increases, the intensity of crystalline reflections of the Co-hydrotalcite catalysts decreases. There were found porous with the shape of parallel layers with a monomodal mesoporous distribution. Superficial chemical groups as: - OH, H 2O, Al-OH, Mg-OH, W-O-W and CO3 2- were found by infrared spectroscopy. Catalyst with low amounts of W (1{\%}) showed both, the highest H2 production and the best catalytic stability. The smallest pore volume of this catalyst could be related with long residence times of ethanol in the pores. Tungsten promoted the conversion for the Co-hydrotalcite catalysts. The reaction products were: H2, CO2, CH3CHO, CH4 and C2H4 and the catalysts did not produce CO. {\circledC} J. New Mat. Electrochem. Systems.",
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Contreras, JL, Ortiz, MA, Fuentes, GA, Luna, R, Salmones, J, Zeifert, B, Nuno, L & Vazquez, A 2010, 'Tungsten effect over co-hydrotalcite catalysts to produce hydrogen from bio-ethanol', Journal of New Materials for Electrochemical Systems, pp. 253-259.

Tungsten effect over co-hydrotalcite catalysts to produce hydrogen from bio-ethanol. / Contreras, J. L.; Ortiz, M. A.; Fuentes, G. A.; Luna, R.; Salmones, J.; Zeifert, B.; Nuno, L.; Vazquez, A.

In: Journal of New Materials for Electrochemical Systems, 01.12.2010, p. 253-259.

Research output: Contribution to journalArticle

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T1 - Tungsten effect over co-hydrotalcite catalysts to produce hydrogen from bio-ethanol

AU - Contreras, J. L.

AU - Ortiz, M. A.

AU - Fuentes, G. A.

AU - Luna, R.

AU - Salmones, J.

AU - Zeifert, B.

AU - Nuno, L.

AU - Vazquez, A.

PY - 2010/12/1

Y1 - 2010/12/1

N2 - A great stabilization effect of tungsten over the Co-hydrotalcite catalysts to produce H2 from ethanol in steam reforming was found. The catalysts were characterized by N2 physisorption (BET area), X-ray diffraction, Infrared ,Raman and UV-vis spectroscopies. Catalytic evaluations were performed in a fixed bed reactor using a water/ethanol mol ratio of 4, at 450°C, and the W concentration studied was from 0.5 to 3 wt%. As W concentration increases, the intensity of crystalline reflections of the Co-hydrotalcite catalysts decreases. There were found porous with the shape of parallel layers with a monomodal mesoporous distribution. Superficial chemical groups as: - OH, H 2O, Al-OH, Mg-OH, W-O-W and CO3 2- were found by infrared spectroscopy. Catalyst with low amounts of W (1%) showed both, the highest H2 production and the best catalytic stability. The smallest pore volume of this catalyst could be related with long residence times of ethanol in the pores. Tungsten promoted the conversion for the Co-hydrotalcite catalysts. The reaction products were: H2, CO2, CH3CHO, CH4 and C2H4 and the catalysts did not produce CO. © J. New Mat. Electrochem. Systems.

AB - A great stabilization effect of tungsten over the Co-hydrotalcite catalysts to produce H2 from ethanol in steam reforming was found. The catalysts were characterized by N2 physisorption (BET area), X-ray diffraction, Infrared ,Raman and UV-vis spectroscopies. Catalytic evaluations were performed in a fixed bed reactor using a water/ethanol mol ratio of 4, at 450°C, and the W concentration studied was from 0.5 to 3 wt%. As W concentration increases, the intensity of crystalline reflections of the Co-hydrotalcite catalysts decreases. There were found porous with the shape of parallel layers with a monomodal mesoporous distribution. Superficial chemical groups as: - OH, H 2O, Al-OH, Mg-OH, W-O-W and CO3 2- were found by infrared spectroscopy. Catalyst with low amounts of W (1%) showed both, the highest H2 production and the best catalytic stability. The smallest pore volume of this catalyst could be related with long residence times of ethanol in the pores. Tungsten promoted the conversion for the Co-hydrotalcite catalysts. The reaction products were: H2, CO2, CH3CHO, CH4 and C2H4 and the catalysts did not produce CO. © J. New Mat. Electrochem. Systems.

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