Three or More Phase Reactors

Manjrekar, Onkar N.; Sun, Yujian; Mills, Patrick L.

doi:10.1002/9783527812066.ch8

Cited by 1 publication

(1 citation statement)

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“…Regions that are not properly fed either by sufficient reactant liquid, or sufficient gas phase reactant may lead to an under-utilization of the catalyst, and may contribute to the formation of hot spots (in particular for highly exothermic reactions). 13 Liquid maldistribution also has a considerable impact in pressure drop, which may cause a significant increase in the long term operating cost of any FBR unit. 11 Experimental studies, such as the work of Benyahia and O'Neill, 14 Bazmi et al, 5 and the experimental/numerical work of Ancheyta 15 and Silva et al, 16 showed that there is a strong connection between holdup and maldistribution, while a relationship between holdup and pressure drop influences the reactor performance.…”

Section: ■ Introductionmentioning

confidence: 99%

Assessing the Performance of Hydrotreating Reactor of Diolefin with Different Inlet Configurations via Computational Fluid Dynamics

Penteado

Peres

Santos

et al. 2023

Ind. Eng. Chem. Res.

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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.

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