Synthesis and Sulfating of the ZrO₂ for Obtaining of a Catalyst in Order to Future Use in Esterification for Biodiesel Production

Abstract:

This work aims to synthesize ZrO₂ by the combustion reaction method and its sulfating for future use as a catalyst in esterification of the cottonseed oil. The synthesized sample was produced in batches of 15g, using as precursor the zirconium IV n-propoxide and urea as fuel. The sulfating occurred with an ion content of SO₄^-2 with 30% in relation to the mass of ZrO₂. The samples were characterized by XRD, SEM and particle size distribution. The results revealed the formation of the monoclinic majority phase with traces of the orthorhombic phase referring to the synthesized sample, and a transformation of the orthorhombic phase to the tetragonal phase when sulfated. The morphology have shown the formation of homogeneous and spherical agglomerates, with a mean particle size of 24.34nm. The presence of traces of the tetragonal phase in the XRD of the SO₄^2-/ZrO₂ was a great indicator for future use in the esterification reaction to obtain biodiesel, because this type of phase after sulfating becomes very promising for the ester obtaining.

• Periodical: Materials Science Forum (Volume 820)
• Pages: 102-106
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.820.102
• Online since: June 2015
• Authors: Francisco Nilson Silva, J. Dantas, A.S. Silva, E.M.J.A. Pallone, A.C.F.M. Costa
• Keywords: Esterification, Morphology, Sulfating, Synthesis, Zro₂

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