Article (Scientific journals)
Comparison of steam and nitrogen in the physical deacidification of soybean oil
Decap, Philippe; Danthine, Sabine; Vanbrabant, Béatrice et al.
2004In Journal of the American Oil Chemists' Society, 81 (6), p. 611-617
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Keywords :
deacidification; deodorization; nitrogen; physical refining; steam; vegetable oil
Abstract :
[en] Deacidification in physical refining is one of the most sensitive steps in refining edible vegetable oils because of its large impact on the quality of the oil. The removal of volatile compounds such as FFA is accomplished at elevated temperatures and a high vacuum with a stripping gas, usually steam. The aim of this work was to verify, at the laboratory level, the advantages of using an alternative stripping gas, nitrogen, instead of steam. An ideal vapor-liquid equilibrium model (lVLE) was used to compare the stripping capacities of steam and nitrogen and to analyze the effects of various operational parameters (temperature, pressure, amount of stripping gas) on the residual acidity of the oil. There was no clear evidence that nitrogen showed a higher capacity to strip FFA than steam. The IVLE model seemed suitable to describe FFA laboratory distillation by using steam or nitrogen, provided the final residual content of FFA was not too low.
Disciplines :
Food science
Author, co-author :
Decap, Philippe
Danthine, Sabine  ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Vanbrabant, Béatrice
De Greyt, Wim
Deroanne, Claude ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Language :
English
Title :
Comparison of steam and nitrogen in the physical deacidification of soybean oil
Publication date :
2004
Journal title :
Journal of the American Oil Chemists' Society
ISSN :
0003-021X
eISSN :
1558-9331
Publisher :
American Oil Chemists Society, Champaign, United States - Illinois
Volume :
81
Issue :
6
Pages :
611-617
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 20 October 2009

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