Resumo

PEREZ NAVARRO, Omar et al. Methodological contribution of mathematical modeling of chemical and biological reactors to process development. Universidad y Sociedad [online]. 2022, vol.14, n.1, pp. 618-630.  Epub 10-Fev-2022. ISSN 2218-3620.

Reactor modeling is a complex scientific activity that has a decisive impact on the design, evaluation and optimization of this equipment. The objective of this work is to contribute methodologically to the mathematical modeling of chemical and biological reactors facilitating the development of chemical industry processes and its application as a case study to the modeling of the acetylation reactor of native and pregelatinized starch from Manihot esculenta Crantz (Yuca). The methodological-heuristic proposal presented leads to phenomenological and statistical modeling. In the phenomenological modeling, a chemical or diffusional mechanism is selected, the model parameters are determined using the methods of integral or differential kinetic analysis and the material and energy balances are solved. Statistical modeling is based on regression analysis and optimization and in turn supports the phenomenological methods. The application of the developed procedure to the modeling of the reactor for acetylation of native and pregelatinized cassava starch of the INIVIT Y-93-4 variety, operating under basic and aqueous conditions, allowed considering a mechanism of acetylation and hydrolysis of the esterifying agent, determining the appropriate starting material, the most favorable distribution of the product and the thermal and pH effects on the kinetics.

Palavras-chave : Chemical and biological reactor; kinetics; phenomenological models; statistical models; acetylated starch.

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