Reaction Kinetics, Mechanisms and Catalysis
Volume/Issue:
Volume 104: Issue 1
Kinetics of the esterification of palmitic acid with methanol catalyzed by 12-tungstophosphoric acid supported on ZrO2
Authors: K. Srilatha 1 , N. Lingaiah 1 , P. S. Sai Prasad 1 , B. L. A. Prabhavathi Devi 2 , and R. B. N. Prasad 2
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  • 1 Catalysis Division, Indian Institute of Chemical Technology, Hyderabad 500007, India
  • 2 Centre for Lipid Science & Technology, Indian Institute of Chemical Technology, Hyderabad 500007, India
DOI:
https://doi.org/10.1007/s11144-011-0334-z
Page Count:
211–226
Publication Date:
01 Oct 2011
Online Publication Date:
24 Jun 2011
Article Category:
Research Article
Restricted access

Abstract

A series of catalysts containing 5–25 wt% 12-tungstophosphoric acid supported on hydrous zirconia were prepared and their catalytic activity evaluated for the esterification of palmitic acid with methanol. These catalysts were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, surface area (BET method), and potentiometric titration for the estimation of acidity. The catalyst with 20 wt% TPA calcined at 300 °C exhibited the highest activity. The effects of reaction variables such as catalyst loading, methanol to acid molar ratio and reaction temperature were studied. The pseudo-homogeneous (PH), Eley-Rideal (ER) and Langmuir-Hinshelwood-Hougen-Watson (LHHW) kinetic models were applied to correlate the experimental kinetic data and kinetic parameters were evaluated. The LHHW model gave the best fit.

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Cover Reaction Kinetics, Mechanisms and Catalysis
Reaction Kinetics, Mechanisms and Catalysis
Print ISSN:
1878-5190
Online ISSN:
1878-5204
Keywords:
Esterification; Biodiesel; Kinetic model; Palmitic acid; 12-Tungstophosphoric acid; Zirconia

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