Abstracts Book - IMRC 2018

• SF3-P051
Al2O3-TiO2-ZrO2 MIXED OXIDES: EFFECT OF THE TEMPERATURE
TREATMENTS IN PHYSICOCHEMICAL PROPERTIES
Jorge Cortez Elizalde 1 , Jose Gilberto Torres Torres 1 , Adib Abiu Silahua Pavon 1 , Pedro Cadenas
Lopez 2 , Ignacio Cuauhtémoc 1 , José Guadalupe Pacheco 1
1 Universidad Juárez Autónoma de Tabasco, Centro de Investigación de Ciencia y Tecnología
Aplicada (CICTAT), DACB, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de
Fuentes de Energía y Remediación Ambiental, Mexico. 2 Universidad Juárez Autónoma de
Tabasco, División Académica de Ingeniería y Arquitectura, Mexico.
In this work, mixed oxides Al 2 O 3 -TiO 2 -ZrO 2 were synthesized by sol-gel method
varying their composition by weight (33/33/33, 40/40/20, 20/40/40 and
30/30/40% w / w respectively). The materials were calcined at two different
temperatures 600 and 900 ° C, to be used in biofuel production processes. The
catalysts were characterized by several physicochemical methods such as:
Thermogravimetric Analysis and Differential Scanning Calorimetry TGA-DSC,
Nitrogen physisorption (N 2 ), X-ray diffraction (XRD), RAMAN spectroscopy and
Infrared spectroscopy (FTIR). The results of TGA-DSC showed that at 600 ° C the
materials stabilize and that at 850 ° C zirconia titanates are formed when the
content of titania and zirconia are higher than the alumina and are not formed
when the alumina is the most abundance. The BET areas showed values
between 294.71 m 2 /g and 165.92 m 2 /g according to the weight percentage
ratios, the adsorption isotherms are characteristic of mesoporous materials in
the case of materials calcined at 600°C, when they were calcined at 900 ° C the
areas decrease between 29.01 m 2 /g and 16.36 m 2 /g and the pore size increases
in these materials due to the high temperature applied which emphasize the
pore coalescence phenomena. DRX results showed that the diffractograms
correspond to amorphous materials to the samples calcined at 600 ° C, while
when the temperature rises to 900°C these materials become more crystalline,
in these cases several crystalline phases were observed, m-ZrO 2 , Al 2 TiO 5 , ZrTiO 4
and TiO 2 . RAMAN spectroscopy results are in concordance with the XRD results,
showing m-ZrO 2 , Al 2 TiO 5 , ZrTiO 4 phases and the interactions that are distributed
in XRD when calcining at 900°C. Finally, FTIR results showed the stretch bands
characteristic of OH at 3461.4 cm -1 and the flexion of δ = OH 1636.6 cm -1 . Due
to the precursors in the sol-gel synthesis, there are traces of carbon in 2376.4
cm -1 and interactions between O-M-O (M = Al, Ti and Zr) were showed too. Based
on the properties of the materials, foreseeing several applications can be, but in
our case will be using to obtain biofuels biomass.