Estimação de parâmetros em modelos de hidrocraqueamento de cinética contínua usando o método de caracterização adaptativa

Abstract

Continuous kinectics was introduced in hydrocracking process modelling more than 20 years ago. Model’s solution established in literature discretizes feeds/products using lots of pseudocomponents, with high computational costs, wich hinders the accurate solution of the model and the estimation of its parameters. Recently, mixture modelling using the adaptive characterization method was applied to hydrocracking continuous kinetic model and drastically improved solution’s speed. This work explores the application of this methodology in the kinetics parameter’s estimation of hydrocracking models. This methodology allowed the determination of temperature’s effect over process yields, resulting in a 6 parameters linear model, abble to describe products’ TBP curves at temperatures of 390, 410 and 430oC and space times of 0.4, 0.5, 0.66, 1 and 2 h, with maximum yield error lower than 5%. As the number of quadrature points used in solution increase, estimation results show parameter convergence and sensitivity analysis near the solution shows that there is a good chance that the global optimum has been found.