Modelagem e simulação do processo de oxidação do etanol a acetaldeido

AUTOR(ES)
DATA DE PUBLICAÇÃO

1992

RESUMO

A new high performance catalyst is proposed to oxidize ethanol to acetaldehyde. The available experimental data are analysed using two different reactional mechanisms. After choosing a Temkin type mechanism, the single reaction rate equation to be used in the simulations is determined. Then,a continuous bidimendional steady-state model for the catalytic bed inside a tube is developed, considering heat and mass transfer by radial dispersion and axial convection. All the elements necessary to the detailed catalytic bed modeling are put together, including the correlations to calculate the pure-component physical properties and the respective mixture-property interpolative calculation methods, the correlations to estimate heat and mass transfer parameters, pressure drop, and the void fraction in packed beds of spheres. The final model is prepared to the application of the employed numerical methods. An adimensionalization of the variables preceeds the discretization of the partial differential equations by an orthogonal collocation method. The application of the method of lines, a combination of an orthogonal collocation method in the radial dimension and an axial integration by an explicit 4th order Runge-Kutta method, is described. Then, a Gauss-Jacobi quadrature based method for the radial mean physical properties calculations is developed. Two computer programs were developed and exploited... Note: The complete abstract is available with the full electronic digital thesis or dissertations

ASSUNTO(S)

engenharia quimica processos quimicos

ACESSO AO ARTIGO

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