Endüstriyel dizel hidro-işleme ünitesinin kinetik modellenmesi ve simülasyonu

In refineries, hydroprocessing is a vital technology for upgrading the quality of petroleum. For example hydrotreating is used to remove impurities like sulfur, nitrogen and metals from feedstocks and hydrocracking is used to crack the larger molecules into valuable products. Sulfur removal is a very important issue since governments mandate lower sulfur content fuels because of air pollution by SOx which is produced during combustion of petroleum products. This study focuses on kinetic modeling of an industrial diesel hydroprocessing (DHP) process which consists of three catalytic reactor beds that carry out hydrodesulfurization and hydrocracking. Steady-state non-isothermal, pseudo-homogeneous plug flow models for the catalytic hydrodesulfurization and hydrocracking reactors are separately developed. Continuous lumping approach is used to characterize the complex reaction mixture. Three adjustable hydrodesulfurization parameters and one adjustable hydrocracking parameter are fine-tuned using available industrial data. The main purpose of developing the reactor models is to be able to do simulations under different scenarios and to predict the best operating conditions for the DHP process. Simulations show that the developed model is able to accurately predict temperature profiles in each bed, sulfur content of the product and the product distribution in the hydrocracker.