Determinación de la influencia de la cinética en la propuesta tecnológica para la acetilación de almidón de yuca
Fecha
2017
Autores
Toledo Martínez, Lissett de la Caridad
Título de la revista
ISSN de la revista
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Editor
Universidad Central "Marta Abreu" de Las Villas. Facultad de Ingeniería Mecánica e Industrial. Departamento de Ingeniería Química.
Resumen
En el trabajo se desarrolló un estudio cinético del mecanismo de acetilación del almidón nativo de raíces de yuca a través de dos experimentos a las temperaturas de 25°C y 40°C para obtener las expresiones de velocidad de los componentes involucrados usando el método integral gráfico. Se determinaron los grados de sustitución experimentales y se calcularon las concentraciones del producto deseado haciendo las consideraciones pertinentes y mediantes balances de masa se obtuvieron las otras concentraciones de las sustancias que participan en la reacción. Se demostraron las condiciones iniciales supuestas para la determinación de las concentraciones con el grado de sustitución mediante un proceso de validación. Los resultados de un estudio de la selectividad del producto deseado lograron decidir el mejor modelo de contacto para la etapa de reacción química del proceso. Se hizo una propuesta tecnológica donde se estudiaron las capacidades de los equipos involucrados. Se diseñaron los equipos de la etapa con reacción según el modelo de contacto propuesto. Se analizaron los indicadores económicos para determinar la rentabilidad de la planta propuesta.
In the work a kinetic study of the mechanism of native starch acetylation of cassava roots was developed through two experiments at temperatures of 25 °C and 40 ° C to obtain the velocity expressions of the components involved using the integral graphical method. The experimental degrees of substitution were determined and the concentrations of the desired product were calculated by taking the relevant considerations and by means of mass balances the other concentrations of the substances involved in the reaction were obtained. The assumed initial conditions were determined for the determination of the concentrations with the degree of substitution by means of a validation process. The results of a study of the selectivity of the desired product were able to decide the best contact model for the chemical reaction stage of the process. A technological proposal was made where the capacities of the teams involved were studied. The equipment of the reaction stage was designed according to the proposed contact model. Economic indicators were analyzed to determine the profitability of the proposed plant.
In the work a kinetic study of the mechanism of native starch acetylation of cassava roots was developed through two experiments at temperatures of 25 °C and 40 ° C to obtain the velocity expressions of the components involved using the integral graphical method. The experimental degrees of substitution were determined and the concentrations of the desired product were calculated by taking the relevant considerations and by means of mass balances the other concentrations of the substances involved in the reaction were obtained. The assumed initial conditions were determined for the determination of the concentrations with the degree of substitution by means of a validation process. The results of a study of the selectivity of the desired product were able to decide the best contact model for the chemical reaction stage of the process. A technological proposal was made where the capacities of the teams involved were studied. The equipment of the reaction stage was designed according to the proposed contact model. Economic indicators were analyzed to determine the profitability of the proposed plant.
Descripción
Palabras clave
Estudio Cinético, Producción de Almidón, Almidón de Yuca, Características Físico - Químicas