Metodo alternativo para a resolução numerica de modelo dinamico para leito movel simulado em condições de isotermas lineares / Alternative method for the numerical resolution of dynamic model for simulated moving bed with linear isotherm

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

In Brazil, the biodiversity is huge so this country may become one of the greatest bioproducts producers worldwide. When extracted fiom their natural source, those bioproducts are generally obtained in a mixture containing many other compounds, such that, in order to obtain a commercialproduct, the mixture must go through separation and purification processes. In the field of bioprocucts separation, the simulated moving bed process (SMB) has gained much attention since the beginning of the 90th. In modem engineering, modeling and simulating processes has become very common, from the beginning of a new project to the process control in the existing production plants. For simulated moving bed, when rigorous models are used, the model takes the form of a system of coupled partials differentials equations, so that numerical resolutions of the mathematicalproblem are needed. For simulatedmoving bed (SMB) the numerical method of orthogonal collocations is the one most frequently encountered in the literature. This Dissertation presents an altemative numerical method for the simulated moving bed when isotherm can be considered linear. The method proposed, composed of both analytical and numerical schemes which are correlated through Duhamel s theorem, is hybrid. Most of the mass transfer parameters necessary for simulationsare estimated by the use of correlations from literature. Simulation s results for the separation of pharmaceutical s products, using the proposed numerical method, are obtained and compared with experimentalresults fiom literature. Those comparisons demonstrate the validity of the proposed numerical method, showing that it does not induces significant numerical errors, so that one canhave confidence in the results from those simulations.Investigations were also ~ade in order to analyze the influence some of the 5MB operating parameters on the overall equipment s performances

ASSUNTO(S)

simulação (computadores) calculos numericos countercurrent chromatography cromatografia liquida liquid chromatography numerical calculations cromatografia contracorrente computer simulation

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