Esterification over Nano Solid Superacid So₄^2-/ZrO₂–Sm₂O₃-SiO₂

Abstract:

A solid superacid catalyst SO4²-/ZrO₂–Sm₂O₃-SiO₂ was prepared by a coprecipitation method and characterized by means of XRD, TEM and SEM. The kinetics of the esterification of palmitic acid and ethanol catalyzed by nano SO4²-/ZrO₂–Sm₂O₃-SiO₂ catalyst was studied in a stirred batch reactor for the synthesis of ethyl palmitate. The effects of reaction temperature, feed molar ratio, catalyst loading and reusability of the catalyst were evaluated. The optimum conditions were as follows: n(palmitic acid):n(ethanol)=1:5, w(SO4²-/ZrO₂–Sm₂O₃-SiO₂)=2.4%, reaction temperature 403K, and reaction time 2 h. The esterification efficiency of palmitic acid was about 82.6%. The experimental reaction rates were correlated using different rate models include the Eley–Rideal and Langmuir Hinshelwood Hougen Watson models.

• Periodical: Advanced Materials Research (Volumes 194-196)
• Pages: 2503-2506
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.194-196.2503
• Online since: February 2011
• Authors: Fang Li, Chun Mei Ding
• Keywords: Catalytic, Esterification, Kinetic, Nano Solid Superacid

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