Transesterification of soybean oil catalyzed by sulfated zirconia

  • Garcia C
  • Teixeira S
  • Marciniuk L
 et al. 
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Abstract

Two sulfated zirconias were synthesized and characterized by X-ray diffraction and infrared spectroscopy. They were used as catalysts in the alcoholysis of soybean oil and in the esterification of oleic acid. Using sulfated zirconia prepared by the solvent-free method (S-ZrO2) as catalyst, the alcoholysis conversions of soybean oil under optimized conditions (120 °C, 1 h and 5 wt% of catalyst) were 98.6% (methanolysis) and 92% (ethanolysis), respectively. The esterification of oleic acid with methanol was complete after 2 h. Zirconia sulfated by standard methods (SZ) had low activity in the methanolysis of soybean oil (conversion of 8.5%) and conventional zirconia (NS) was inactive for methanolysis under the conditions optimized for S-ZrO2. © 2007 Elsevier Ltd. All rights reserved.

Author-supplied keywords

  • Biodiesel
  • Esterification
  • Sulfated zirconia
  • Transesterification
  • Vegetable oil

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Authors

  • Camila Martins Garcia

  • Sergio Teixeira

  • Letícia Ledo Marciniuk

  • Ulf Schuchardt

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