ABSTRACT
This chapter describes the results of around 50 different hydrocracking pilot plant tests made at PETROBRAS Research Center. The feedstocks used in these tests were Vacuum Gasoils and a blend of unstable cuts such as Light Cycle Oil and Coker Gasoil obtained from Cabiunas and Marlim crude. The objective of the tests was to evaluate yields and products quality generated from the hydrocracking process with the mentioned feedstocks. The tests were performed in two steps. The objective of the first step was to select the optimum condition to produce hydrotreated feedstocks for the second step. The objectives of the second step tests were the removal of the remaining nitrogen and the consequent hydrocracking to generate lighter products. Kinetic models for sulfur, nitrogen and aromatics removal were developed for the Blended Feedstock. The models were based on Arrhenius equation and reaction rate law. The nonlinear equations were solved by Marquadt's method.
