Liquid
maldistribution is an important parameter in the study of
fixed bed reactors (FBRs) as it ensures uniformity in the catalytic
reactions. The hydrotreating process in this study used a three-dimensional
CFD model comparing six different inlet configurations. The model
considers the bed porous structure, hydrodynamics, reaction kinetics,
and heat and mass transfer. An industrial reactor was simulated using
the commercial Ansys Fluent v19.2 CFD package. This study concluded
that the performance of the reactor may increase as the flow uniformity
improves, as a result of a better configuration in the inlet zone.
This was performed by comparing the most frequently used configurations
in the literature, and one ideal case was also studied. The rhomboid
configuration showed a better result considering the maldistribution
factor. As expected due to its flow uniformity, the diolefin conversion
of the reactor has an improvement of 8% in comparison to the spiral
configuration. The results presented in this work will be useful to
optimize the design of existing and new commercial FBRs as well as
their performance.