Some Problems of Mathematical Modeling of Diesel Fuel Hydrotreathing Process
The main approaches to the formation of mathematical models of the kinetics of hydrodesulfurization of diesel fuels and the disadvantages of these approaches are considered, taking into account the reactivity of organic sulfur components that make up diesel fuel. As the concentration of difficultly hydrogenated sulfur-containing pseudocomponents in raw materials increases, the role of the substance limiting the quality of cleaning diesel fuel gradually changes from easily hydrogenated to difficultly hydrogenated pseudocomponent. Using the example of dibenzothiophene hydrogenation, it is shown that a mathematical model using experimentally determined kinetics parameters becomes, by its very nature, only a particular solution of the problem due to the effective values of these parameters. The necessary elements of a complete mathematical model of hydrotreating as a three-phase system are summarized.