Journal of New Materials for Electrochemical Systems

J. L. Contreras, J. Salmones, L. A. García, A. Ponce, B. Zeifert, G. A. Fuentes

Research output: Contribution to conferencePaper

12 Citations (Scopus)

Abstract

Co/Hydrotalcite catalysts were prepared, characterized and evaluated in the steam reforming of ethanol from 500 to 650°C. The addition of Co to the hydrotalcite decreased the surface area, increased the pore volume, produced a bimodal pore distribution and mesopores. Additionally Co promoted thermal stability to the hydrotalcite and produced additional basic sites. It was found that Co concentration was enriched on the hydrotalcite surface. The reaction products were: H 2 ,CO 2 CH 3 CHO, CO, CH 4 and CH 3 COCH 3 . A promoting effect of Co was observed in the conversion of ethanol to H 2 from 2.5 to 10wt%Co. For the hydrotalcites with Co, the selectivity to H 2 was between 63 to 71% among 500 to 650°C. The hydrotalcite without Co produced low selectivity to H 2 and the highest concentration of CH 3 CHO and CH 3 COCH 3 . In all the samples with Co the CO was present only in negligible amounts ( < 1%). The catalyst with 10wt% Co showed the best selectivity to H 2 with 100% of conversion at 500 °C and less than 18% of deactivation after 300 min. A direct relationship between the Co concentration and the total basicity was found. Also a direct relationship between basicity and the conversion was found. © J. New Mat. Electrochem. Systems.
Original languageAmerican English
Pages109-117
Number of pages9
StatePublished - 1 Apr 2008
Externally publishedYes
Eventconference -
Duration: 1 Apr 2008 → …

Conference

Conferenceconference
Period1/04/08 → …

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hydrotalcite
Carbon Monoxide
Alkalinity
Ethanol
Catalysts
Catalyst selectivity
Steam reforming
Reaction products
Thermodynamic stability

Cite this

Contreras, J. L., Salmones, J., García, L. A., Ponce, A., Zeifert, B., & Fuentes, G. A. (2008). Journal of New Materials for Electrochemical Systems. 109-117. Paper presented at conference, .
Contreras, J. L. ; Salmones, J. ; García, L. A. ; Ponce, A. ; Zeifert, B. ; Fuentes, G. A. / Journal of New Materials for Electrochemical Systems. Paper presented at conference, .9 p.
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abstract = "Co/Hydrotalcite catalysts were prepared, characterized and evaluated in the steam reforming of ethanol from 500 to 650°C. The addition of Co to the hydrotalcite decreased the surface area, increased the pore volume, produced a bimodal pore distribution and mesopores. Additionally Co promoted thermal stability to the hydrotalcite and produced additional basic sites. It was found that Co concentration was enriched on the hydrotalcite surface. The reaction products were: H 2 ,CO 2 CH 3 CHO, CO, CH 4 and CH 3 COCH 3 . A promoting effect of Co was observed in the conversion of ethanol to H 2 from 2.5 to 10wt{\%}Co. For the hydrotalcites with Co, the selectivity to H 2 was between 63 to 71{\%} among 500 to 650°C. The hydrotalcite without Co produced low selectivity to H 2 and the highest concentration of CH 3 CHO and CH 3 COCH 3 . In all the samples with Co the CO was present only in negligible amounts ( < 1{\%}). The catalyst with 10wt{\%} Co showed the best selectivity to H 2 with 100{\%} of conversion at 500 °C and less than 18{\%} of deactivation after 300 min. A direct relationship between the Co concentration and the total basicity was found. Also a direct relationship between basicity and the conversion was found. {\circledC} J. New Mat. Electrochem. Systems.",
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Contreras, JL, Salmones, J, García, LA, Ponce, A, Zeifert, B & Fuentes, GA 2008, 'Journal of New Materials for Electrochemical Systems', Paper presented at conference, 1/04/08 pp. 109-117.

Journal of New Materials for Electrochemical Systems. / Contreras, J. L.; Salmones, J.; García, L. A.; Ponce, A.; Zeifert, B.; Fuentes, G. A.

2008. 109-117 Paper presented at conference, .

Research output: Contribution to conferencePaper

TY - CONF

T1 - Journal of New Materials for Electrochemical Systems

AU - Contreras, J. L.

AU - Salmones, J.

AU - García, L. A.

AU - Ponce, A.

AU - Zeifert, B.

AU - Fuentes, G. A.

PY - 2008/4/1

Y1 - 2008/4/1

N2 - Co/Hydrotalcite catalysts were prepared, characterized and evaluated in the steam reforming of ethanol from 500 to 650°C. The addition of Co to the hydrotalcite decreased the surface area, increased the pore volume, produced a bimodal pore distribution and mesopores. Additionally Co promoted thermal stability to the hydrotalcite and produced additional basic sites. It was found that Co concentration was enriched on the hydrotalcite surface. The reaction products were: H 2 ,CO 2 CH 3 CHO, CO, CH 4 and CH 3 COCH 3 . A promoting effect of Co was observed in the conversion of ethanol to H 2 from 2.5 to 10wt%Co. For the hydrotalcites with Co, the selectivity to H 2 was between 63 to 71% among 500 to 650°C. The hydrotalcite without Co produced low selectivity to H 2 and the highest concentration of CH 3 CHO and CH 3 COCH 3 . In all the samples with Co the CO was present only in negligible amounts ( < 1%). The catalyst with 10wt% Co showed the best selectivity to H 2 with 100% of conversion at 500 °C and less than 18% of deactivation after 300 min. A direct relationship between the Co concentration and the total basicity was found. Also a direct relationship between basicity and the conversion was found. © J. New Mat. Electrochem. Systems.

AB - Co/Hydrotalcite catalysts were prepared, characterized and evaluated in the steam reforming of ethanol from 500 to 650°C. The addition of Co to the hydrotalcite decreased the surface area, increased the pore volume, produced a bimodal pore distribution and mesopores. Additionally Co promoted thermal stability to the hydrotalcite and produced additional basic sites. It was found that Co concentration was enriched on the hydrotalcite surface. The reaction products were: H 2 ,CO 2 CH 3 CHO, CO, CH 4 and CH 3 COCH 3 . A promoting effect of Co was observed in the conversion of ethanol to H 2 from 2.5 to 10wt%Co. For the hydrotalcites with Co, the selectivity to H 2 was between 63 to 71% among 500 to 650°C. The hydrotalcite without Co produced low selectivity to H 2 and the highest concentration of CH 3 CHO and CH 3 COCH 3 . In all the samples with Co the CO was present only in negligible amounts ( < 1%). The catalyst with 10wt% Co showed the best selectivity to H 2 with 100% of conversion at 500 °C and less than 18% of deactivation after 300 min. A direct relationship between the Co concentration and the total basicity was found. Also a direct relationship between basicity and the conversion was found. © J. New Mat. Electrochem. Systems.

M3 - Paper

SP - 109

EP - 117

ER -

Contreras JL, Salmones J, García LA, Ponce A, Zeifert B, Fuentes GA. Journal of New Materials for Electrochemical Systems. 2008. Paper presented at conference, .