Please use this identifier to cite or link to this item: http://repositorio.ufpa.br/jspui/handle/2011/5890
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Type: Artigo de Periódico
Issue Date: Dec-1997
Authors: MACHADO, Nélio Teixeira de
BRUNNER, Gerd
Title: Separation of satured and unsaturated fatty acids from palm fatty acids distillates in continuous multistage countercurrent columns with supercritical carbon dioxide as solvent: a process design methodology
Citation: MACHADO, Nélio Teixeira; BRUNNER, Gerd. Separation of satured and unsaturated fatty acids from palm fatty acids distillates in continuous multistage countercurrent columns with supercritical carbon dioxide as solvent: a process design methodology. Ciência e Tecnologia de Alimentos, Campinas, v. 17, n. 4, p. 361-370, dez. 1997. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20611997000400004&lng=pt&nrm=iso>. Acesso em: 30 jun. 2014. <http://dx.doi.org/10.1590/S0101-20611997000400004>.
Abstract: In this work the separation of multicomponent mixtures in counter-current columns with supercritical carbon dioxide has been investigated using a process design methodology. First the separation task must be defined, then phase equilibria experiments are carried out, and the data obtained are correlated with thermodynamic models or empirical functions. Mutual solubilities, Ki-values, and separation factors aij are determined. Based on this data possible operating conditions for further extraction experiments can be determined. Separation analysis using graphical methods are performed to optimize the process parameters. Hydrodynamic experiments are carried out to determine the flow capacity diagram. Extraction experiments in laboratory scale are planned and carried out in order to determine HETP values, to validate the simulation results, and to provide new materials for additional phase equilibria experiments, needed to determine the dependence of separation factors on concetration. Numerical simulation of the separation process and auxiliary systems is carried out to optimize the number of stages, solvent-to-feed ratio, product purity, yield, and energy consumption. Scale-up and cost analysis close the process design. The separation of palmitic acid and (oleic+linoleic) acids from PFAD-Palm Fatty Acids Distillates was used as a case study.
Keywords: Hidrodinâmica
Extração com fluído supercrítico
Extração por solventes
Ácidos graxos
Dióxido de carbono
ISSN: 1678-457X
Appears in Collections:Artigos Científicos - FEQ/ITEC

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