EFFECT OF THE PREPARATION METHOD ON THE PROPERTIES OF Zr-Ti MIXED OXIDES

  • J. Guzmán-López
  • H. Pérez-Pastenes
  • J. Trejo-Gaytán
  • T. Viveros-García
Keywords: titania-zirconia, 2-propanol decomposition, mixed oxides, sol-gel, precipitation

Abstract

ZrO2-TiO2 mixed oxides were synthesized with different molar composition by precipitation and sol-gel processes. The samples were characterized by N2 physisorption, X-ray diffraction and gravimetric and differential thermal analysis. The materials were tested in the decomposition of 2-propanol in order to determine the acidity and basicity by alcohol dehydration and dehydrogenation, respectively. The sol-gel materials offer higher surface area and acidity, and better thermal behavior than the similar precipitation materials. The mixed oxides Zr-Ti with equimolar relation offer improved support catalytic propierties: a) higher surface area (250 m2/g sol-gel and 200 m2/g by precipitation, both samples calcined at 500ºC), b) a higher temperature of cristallization for the formation of ZrTiO4 (690ºC sol-gel and 640ºC precipitation) and c) higher rate for the decomposition of 2-propanol to propylene indicating the highest acidity. The presence of acid and basic sites in equimolar Zr-Ti support via sol-gel offers attractive bifunctional properties

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Published
2020-11-18
How to Cite
Guzmán-López, J., Pérez-Pastenes, H., Trejo-Gaytán, J., & Viveros-García, T. (2020). EFFECT OF THE PREPARATION METHOD ON THE PROPERTIES OF Zr-Ti MIXED OXIDES. Revista Mexicana De Ingeniería Química, 1(1), 29-36. Retrieved from http://www.rmiq.org/ojs311/index.php/rmiq/article/view/2211