Estudo dos fenômenos de transporte em cromatografia através da aplicação de modelos de rede e estocásticos / Study of transport phenomena in chromatography by application of network and stochastic models

AUTOR(ES)

Flávio de Matos Silva

FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

17/05/2011

RESUMO

The study of different phenomena of separation has been most important for the different areas of industry and science. Due to the large computational available, we can model and analyze the chromatographic phenomena at the microscopic level. The network model has been most used to represent processes of separation by chromatography, because through them we are able represent the topological and morphological aspects of different adsorbent materials available on the market. In this work we aim at studying the dynamics of percolation chromatography through the phenomenology of adsorption, desorption and axial dispersion. In this work we aim to develop a three-dimensional network model representation of a chromatographic column, microscopic level, which will model the phenomena of adsorption, desorption and axial dispersion through a stochastic method. After that, a two-dimensional network model is used to represent a system of adsorption in batch, keeping the modeling of the adsorption / desorption, and then compare to real systems. In both systems modeled are analyzed the equilibrium constant, the basic parameter in the adsorption systems, and at the end are obtained and analyzed adsorption isotherms. We concluded for the network models the phenomena of adsorption and desorption were sufficient to obtain output profiles similar to those seen experimentally, the phenomenon of axial dispersion effect unless the kinetic phenomena in question.

ASSUNTO(S)

fenomenos de transporte adsorção cromatografia dessorção modelos de redes métodos estocásticos percolação (física estatística) adsorption chromatography desorption network models stochastic methods

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