(200f) Lumped Kinetic Model for Hydrocracking of Heavy Oils over Oil-Dispersed Mo-Based Catalyst

A 5-lump (unconverted residue, vacuum gas oil, distillates, naphtha and gases) kinetic model for hydrocracking of heavy oils is developed. To obtain the experimental data, a continuous-stirred tank reactor has been used and the experiments have been carried out using Mo-based oil-dispersed catalyst precursor and vacuum residue from the commercial refinery in South Korea. The reaction temperature has varied in the range of 425 – 440 °C and the reactor pressure has varied in the range of 140 – 160 bar, which are the ordinary operating window of the slurry hydrocrackers. For the efficient parameter estimation, the efficient optimization algorithm combining the genetic algorithm and the deterministic algorithm have been adopted due to the nonlinear and high dimensional object function for the parameter estimation. The prediction results by the developed kinetic model has shown the good agreement with the experimental values so this work is considered to contribute to designing an appropriate slurry hydrocracker.