Open AccessAdsorption of aromatic amino acids in a fixed bed column
Author(s) -
Marco Aurélio Cremasco,
Reginaldo Guirardello,
N.-H. Linda Wang
Publication year - 2003
Publication title -
brazilian journal of chemical engineering/brazilian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.313
H-Index - 52
eISSN - 1678-4383
pISSN - 0104-6632
DOI - 10.1590/s0104-66322003000300012
Subject(s) - amino acid , phenylalanine , adsorption , chemistry , breakthrough curve , aqueous solution , aromatic amino acids , chromatography , benzene , mass transfer , simulated moving bed , phase (matter) , work (physics) , ion exchange resin , organic chemistry , thermodynamics , physics , biochemistry
Phenylalanine (Phe) and tyrosine (Tyr) are two of the twenty amino acids in proteins; they are classified as aromatic amino acids, because both have a benzene ring in their structures. These amino acids are important in the synthesis of several biologically active amines, such as beta-endorphin, a neurotransmitter. Amino acids can be separated by ion-exchange chromatography. In this case, it is important that fixed-bed adsorber design adequately predict the breakthrough curve. This work presents a mathematical model for both fluid and porous phases. In the solution proposed for this model the liquid-phase concentration inside the particles is solved analytically and is related to the liquid-phase concentration in the bed using Duhamel's theorem. The solution for liquid-phase concentration in the bed is then solved numerically instead of analytically. The basic mass transfer parameters are from the literature. The results from the model are compared with those obtained experimentally using Phe and Tyr diluted in aqueous solutions in a fixed bed of PVP (poly-4-vinylpyridine) resin