Synthesis of Pt/Al <inf>2</inf> O <inf>3</inf> catalyst using mesoporous alumina prepared with a cationic surfactant

J. L. Contreras, G. Gómez, B. Zeifert, J. Salmones, T. Vázquez, G. A. Fuentes, J. Navarrete, L. Nuño

Resultado de la investigación: Contribución a una revistaArtículo

2 Citas (Scopus)

Resumen

© 2014 Elsevier B.V. All rights reserved. Pt on alumina catalysts were studied when the texture of the alumina change by addition of a cationic surfactant cetyl-trimethyl ammonium bromide (CTAB). The mesoporous alumina was prepared using CTAB from 0.01 to 0.1 M. The surface area and pore volume increased as CTAB concentration increased passing through a maximum. After calcination at 300 °C, and 550 °C boehmite and γ-Al 2 O 3 were found by XRD. After calcination at 800 °C, the transition between γ- and θ-Al 2 O 3 was observed together with an increase of pore volume and pore diameter respect to the alumina without surfactant. The alumina prepared with the lowest concentration of CTAB showed the highest thermal stability. Brønsted and Lewis acidities were found on alumina samples having CTAB concentrations from 0 to 0.075 M. The sample of alumina with the highest CTAB concentration showed the highest population of pentahedral aluminum (Al V ), Lewis acidity and a dense network of wormlike particles by SEM. After H 2 reduction of these catalysts, sulfur that came from the alumina support weakened the function of Pt particles to hydrogenolysis reaction whereas the CTAB introduced Brønsted acid sites in the alumina increasing the isomerization reaction.
Idioma originalInglés estadounidense
Páginas (desde-hasta)72-86
Número de páginas63
PublicaciónCatalysis Today
DOI
EstadoPublicada - 15 jul 2015
Publicado de forma externa

Huella dactilar

Aluminum Oxide
Cationic surfactants
Surface-Active Agents
Alumina
Catalysts
Acidity
Calcination
Hydrogenolysis
Isomerization
ammonium bromide
cetyl ammonium bromide
Aluminum
Sulfur
Catalyst supports
Surface active agents
Thermodynamic stability
Textures
Hot Temperature
Scanning electron microscopy
Acids

Citar esto

Contreras, J. L. ; Gómez, G. ; Zeifert, B. ; Salmones, J. ; Vázquez, T. ; Fuentes, G. A. ; Navarrete, J. ; Nuño, L. / Synthesis of Pt/Al <inf>2</inf> O <inf>3</inf> catalyst using mesoporous alumina prepared with a cationic surfactant. En: Catalysis Today. 2015 ; pp. 72-86.
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abstract = "{\circledC} 2014 Elsevier B.V. All rights reserved. Pt on alumina catalysts were studied when the texture of the alumina change by addition of a cationic surfactant cetyl-trimethyl ammonium bromide (CTAB). The mesoporous alumina was prepared using CTAB from 0.01 to 0.1 M. The surface area and pore volume increased as CTAB concentration increased passing through a maximum. After calcination at 300 °C, and 550 °C boehmite and γ-Al 2 O 3 were found by XRD. After calcination at 800 °C, the transition between γ- and θ-Al 2 O 3 was observed together with an increase of pore volume and pore diameter respect to the alumina without surfactant. The alumina prepared with the lowest concentration of CTAB showed the highest thermal stability. Br{\o}nsted and Lewis acidities were found on alumina samples having CTAB concentrations from 0 to 0.075 M. The sample of alumina with the highest CTAB concentration showed the highest population of pentahedral aluminum (Al V ), Lewis acidity and a dense network of wormlike particles by SEM. After H 2 reduction of these catalysts, sulfur that came from the alumina support weakened the function of Pt particles to hydrogenolysis reaction whereas the CTAB introduced Br{\o}nsted acid sites in the alumina increasing the isomerization reaction.",
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Synthesis of Pt/Al <inf>2</inf> O <inf>3</inf> catalyst using mesoporous alumina prepared with a cationic surfactant. / Contreras, J. L.; Gómez, G.; Zeifert, B.; Salmones, J.; Vázquez, T.; Fuentes, G. A.; Navarrete, J.; Nuño, L.

En: Catalysis Today, 15.07.2015, p. 72-86.

Resultado de la investigación: Contribución a una revistaArtículo

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T1 - Synthesis of Pt/Al 2 O 3 catalyst using mesoporous alumina prepared with a cationic surfactant

AU - Contreras, J. L.

AU - Gómez, G.

AU - Zeifert, B.

AU - Salmones, J.

AU - Vázquez, T.

AU - Fuentes, G. A.

AU - Navarrete, J.

AU - Nuño, L.

PY - 2015/7/15

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N2 - © 2014 Elsevier B.V. All rights reserved. Pt on alumina catalysts were studied when the texture of the alumina change by addition of a cationic surfactant cetyl-trimethyl ammonium bromide (CTAB). The mesoporous alumina was prepared using CTAB from 0.01 to 0.1 M. The surface area and pore volume increased as CTAB concentration increased passing through a maximum. After calcination at 300 °C, and 550 °C boehmite and γ-Al 2 O 3 were found by XRD. After calcination at 800 °C, the transition between γ- and θ-Al 2 O 3 was observed together with an increase of pore volume and pore diameter respect to the alumina without surfactant. The alumina prepared with the lowest concentration of CTAB showed the highest thermal stability. Brønsted and Lewis acidities were found on alumina samples having CTAB concentrations from 0 to 0.075 M. The sample of alumina with the highest CTAB concentration showed the highest population of pentahedral aluminum (Al V ), Lewis acidity and a dense network of wormlike particles by SEM. After H 2 reduction of these catalysts, sulfur that came from the alumina support weakened the function of Pt particles to hydrogenolysis reaction whereas the CTAB introduced Brønsted acid sites in the alumina increasing the isomerization reaction.

AB - © 2014 Elsevier B.V. All rights reserved. Pt on alumina catalysts were studied when the texture of the alumina change by addition of a cationic surfactant cetyl-trimethyl ammonium bromide (CTAB). The mesoporous alumina was prepared using CTAB from 0.01 to 0.1 M. The surface area and pore volume increased as CTAB concentration increased passing through a maximum. After calcination at 300 °C, and 550 °C boehmite and γ-Al 2 O 3 were found by XRD. After calcination at 800 °C, the transition between γ- and θ-Al 2 O 3 was observed together with an increase of pore volume and pore diameter respect to the alumina without surfactant. The alumina prepared with the lowest concentration of CTAB showed the highest thermal stability. Brønsted and Lewis acidities were found on alumina samples having CTAB concentrations from 0 to 0.075 M. The sample of alumina with the highest CTAB concentration showed the highest population of pentahedral aluminum (Al V ), Lewis acidity and a dense network of wormlike particles by SEM. After H 2 reduction of these catalysts, sulfur that came from the alumina support weakened the function of Pt particles to hydrogenolysis reaction whereas the CTAB introduced Brønsted acid sites in the alumina increasing the isomerization reaction.

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