Examinando por Materia "Dimensionless parameters"

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    Análisis de la sensibilidad paramétrica y del comportamiento dinámico de la hidrólisis del isocianato de metilo
    (Centro de Informacion Tecnologica, 2016-01-01) Ojeda, J.C.; GilPavas, E.; Dobrosz-Gómez, I.; Gómez, M.A.; Ojeda, J.C.; GilPavas, E.; Dobrosz-Gómez, I.; Gómez, M.A.; Universidad EAFIT. Departamento de Ingeniería de Procesos; Procesos Ambientales (GIPAB)
    In this work, parametric sensitivity and dynamic analysis were combined to determine the thermal instability conditions inherent in the methyl isocyanate hydrolysis reaction. This highly exothermic reaction tragically proved to be very sensible to temperature changes in the so-called Bhopal disaster in 1984. A stirred tank reactor in transient state was considered for simulating the reactive system. First, critical operational conditions were defined from the parametric sensitivity analysis. Subsequently, in a rigorous way, the dynamic analysis determined the thermal instability regions, Hopf bifurcations, and the thermal oscillatory behavior of the reactive system. The Matcont® software was used to solve the differential equations set. It was demonstrated that runaway conditions and the periodic solutions of temperature are closely related with the cooling temperature and the dimensionless parameters (f-dimensionless flow and l-heat transfer term) and their critical parameters were obtained: /c=752.39 and fc=1.57.
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    Sensibilidad Paramétrica y Condiciones Seguras de Operación de la Hidrólisis del Anhídrido Acético en un Reactor Batch
    (Centro de Informacion Tecnologica, 2016-01-01) Gaviria, G.H.; GilPavas, E.; Dobrosz-Gómez, I.; Gómez, M.Á.; Gaviria, G.H.; GilPavas, E.; Dobrosz-Gómez, I.; Gómez, M.Á.; Universidad EAFIT. Departamento de Ingeniería de Procesos; Procesos Ambientales (GIPAB)
    The results of a study on the parametric sensitivity of acetic acid production by hydrolysis of acetic anhydride, using acid homogeneous catalysis in a batch reactor, are presented. Dimensionless parameters of mass and energy balances were fitted using experimental data available in the literature that includes the variation of the reaction temperature for different sulfuric acid concentrations (3% to 5%). Then, from the analysis of the intrinsic mathematical properties of the concentration-temperature phase plane, the critical operating conditions were defined. Thus, it was possible to determine the specific values of the safe operating conditions for the catalyzed hydrolysis of acetic anhydride, in the function of catalyst concentration.