Síntesis química, estudios de caracterización y reactividad de un material catalítico a base de ZrO2-H3PW12O40

• Main Authors: Juan Manuel Hernández Enríquez, Ricardo García Alamilla, Ulises Páramo García, Rebeca Silva Rodrigo, Luz Arcelia García Serrano
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2013-01-01
• Series: Química Nova
• Subjects: zirconium oxide; phosphotungstic acid; physico-chemical characterization
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000700003&lng=en&tlng=en
• ISSN: 1678-7064

In this work, the preparation and characterization of materials such as zirconium oxide (ZrO2) and phosphotungstic acid promoted zirconium oxide (ZrO2-H3PW12O40) is presented. Physico-chemical characterization results showed that addition of H3PW12O40 acted as both a textural and chemical promoter of zirconium oxide. The incorporation of phosphotungstic acid into the ZrO2 matrix delayed the sintering of the material and stabilized ZrO2 in the tetragonal phase. ZrO2 acidity was also enhanced, developing strong acid sites on its surface. The Pt/ZrO2-H3PW12O40 catalyst was active for n-pentane isomerization at 250 °C, exhibiting high selectivity to iso-pentane (95%). This result is probably due to its suitable acidity.