A kinetic model for bleaching vegetable oils

Gomes de Oliveria, Christina and Porto, Luismar Marques (2005) A kinetic model for bleaching vegetable oils. Journal of the American Oil Chemists' Society, 82 7: 537-542. doi:10.1007/s11746-005-1106-1


Author Gomes de Oliveria, Christina
Porto, Luismar Marques
Title A kinetic model for bleaching vegetable oils
Journal name Journal of the American Oil Chemists' Society   Check publisher's open access policy
ISSN 0003-021X
Publication date 2005-07-01
Sub-type Article (original research)
DOI 10.1007/s11746-005-1106-1
Open Access Status DOI
Volume 82
Issue 7
Start page 537
End page 542
Total pages 6
Place of publication Champaign, IL, United States
Publisher AOCS
Language eng
Subject 0904 Chemical Engineering
090805 Food Processing
Abstract Very little data and very few kinetic models are available describing and evaluating the performance of bleaching processes, earths, and equipment. This work presents a general kinetic model for the adsorption of pigments by adsorbent earths in several edible oils. It reports the kinetic parameters found for two bleaching earths (one developed in the laboratory and one commercial) for the clarification of soybean oil, as well as their activation energies. The proposed kinetic model is second order in the dimensionless pigment concentration and is in good agreement with our experimental data. A very simple mechanistic explanation based on adsorption/deactivation is offered to justify its application. We also present mathematical modeling based on balance equations to show how the kinetic parameters can be used for bleaching earths and for industrial equipment evaluation and design, such as for the transient fed-batch stirred bleaching vessel. The model seems appropriate to represent data under different operating conditions such as temperature and adsorbent load. The simulation shows that startup procedures are very important in the bleaching process-at least as important as the batch step, in which the oil color reaches its desired standard.
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Fri, 13 Feb 2009, 03:02:32 EST by Joanne Mellor on behalf of Aust Institute for Bioengineering & Nanotechnology