Phase transition and steady-state multiplicity in a trickle-bed reactor

Kheshgi, Haroon S.; Reyes, Sebastián C.; Hu, Raymond; Ho, Teh C.

doi:10.1016/0009-2509(92)85024-6

Cited by 20 publications

(11 citation statements)

References 21 publications

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“…In a previous article Kheshgi et al, 1992 , Raoult's law was introduced to account for the variations in the gas and liquid molar flow rates along the reactor, and the liquid flow rate of zero was considered identical to the disappearance of the liquid phase. However, while the validity of the approach is plausible, it was not verified experimentally.…”

Section: Theoretical Developmentmentioning

confidence: 99%

Dryout phenomena in a three‐phase fixed‐bed reactor

et al. 2003

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Section: Theoretical Developmentmentioning

confidence: 99%

Dryout phenomena in a three‐phase fixed‐bed reactor

et al. 2003

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“…To minimize the costs, effort, and time required in experimental work, mathematical modeling is a powerful tool to assist in achieving such research targets − Only a few were developed for hydrotreating heavy residues, such as the Shell, Chiyoda, Chevron, Halder−Topsoe, Amoco, modified Amoco, and extended Chiyoda , models. Most these models address a single catalyst system.…”

Section: Introductionmentioning

confidence: 99%

A Hydroprocessing Multicatalyst Deactivation and Reactor Performance Model−Pilot-Plant Life Test Applications

et al. 2005

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A simple plug-flow model was developed to study the deactivation mechanisms of hydroprocessing catalysts in atmospheric residue desulfurization (ARDS) units. The three stages of catalyst deactivationsat the start of the run, middle of the run, and end of the runsare considered. The catalyst deactivation is mainly due to metal and coke deposition. The model parameters considered are the unit temperature, fluid velocity, reaction rate constant, catalyst combination, catalyst bed length, and feed concentration of sulfur, metals, and asphaltenes. The simulated results compared very well with our laboratory data for a long catalyst life test operated under constanttemperature mode. The model is further applied to a parametric study that examines the effects of space velocity, unit temperature, and maximum metal capacity on the performance of catalyst systems. A constant-sulfur-mode simulation is also given.

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“…However, the degree of wetting was not reported in their results. Kheshgi et al (1992) developed a pseudo-homogeneous model that described the wet-to-dry phase transition in a laboratory trickle-bed reactor observed by Hanika et al (1976). Unfortunately, their model does not take the complex interplay between intrinsic kinetics, catalyst wetting and diffusion limitation into account.…”

Section: Introductionmentioning

confidence: 99%