Modelagem e simulação de reatores de hidrotratamento de diesel.

Abstract

The aim of this study was to develop mathematical models for predicting the behavior of hydrotreating reactors (HDT) of diesel. Their study aims to model the mass transfer between phases gas-liquid and liquid-solid as well as all the reaction kinetics involved, seeking a numerical model representing the HDT reactor. A total of four models were created, the first pilot plant data used for validation and he served for the general analysis of the methodology used. In the second model was improved reaction kinetics, keeping the other parameters, the third model was again changed to kinetic reaction seeking better integration with software PROII™ and finally the fourth model was developed for computational fluid dynamics (CFD) with simplified reaction kinetics. A l l showed satisfactory results and validation was achieved from experimental data and data from process plant. We could confirm the validation of the models through the good adhesion between the experimental data and calculated profiles. The data were used to validate the residual sulfur content, temperature, pressure and concentration of H2S. And finally the result of the work may have two distinct applications, the first application aims at controlling and optimization reactor and plant HDT through the creation of unit operation within the PROII™, while the second seeks improvement of reactor design through the model developed in CFD.