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Selective adsorption of vitamin E from palm fatty acid distillate on silica-packed fixed-bed columns


Citation

Chu, Boon-Seang and Baharin, Badlishah Sham and Yaakob, Che Man and Quek, Siew-Young (2009) Selective adsorption of vitamin E from palm fatty acid distillate on silica-packed fixed-bed columns. International Journal of Food Engineering, 5 (5). pp. 1-15. ISSN 1556-3758

Abstract / Synopsis

Understanding the behavior of vitamin E adsorption during chromatographic separation was useful for a better control of the process. In this study, a pre-concentrated vitamin E fraction from palm fatty acid distillate (PFAD) was subjected to a normal phase silica-packed fixed-bed column for further purification. The effect of various operational parameters i.e. column bed height, vitamin E inlet concentration, column temperature and flow rate on column performance were detailed. It appeared that the breakthrough curves of all systems showed a typical S-shaped profile. The service time of the column increased when increasing the column bed height, or reducing the inlet concentration, column temperature and flow rate. It was found that column efficiency in terms of adsorbent usage rate could be improved by decreasing the inlet concentration and flow rate. Decreasing the column temperature resulted in higher column capacity, suggesting that the adsorption of vitamin E on silica was an exothermic process. The Bed Depth Service Time (BDST) model described the adsorption process well, with coefficient of determination ranging from 0.92 to 0.99 and low residual sum of square (< 0.28) and standard error (< 0.35). The model could explain the characteristic operational parameters well except for the effect of flow rate in this study.


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Additional Metadata

Item Type: Article
Subject: Fatty acids.
Subject: Vitamin E.
Divisions: Faculty of Food Science and Technology
DOI Number: https://doi.org/10.2202/1556-3758.1656
Publisher: Walter de Gruyter
Keywords: Adsorption; Breakthrough curve; Fixed-bed column; Silica gel; Vitamin E.
Depositing User: Khairil Ridzuan Khahirullah
Date Deposited: 14 Nov 2012 08:31
Last Modified: 23 Nov 2015 03:09
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.2202/1556-3758.1656
URI: http://psasir.upm.edu.my/id/eprint/16652
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