Influence of mass transfer coefficient fluctuation frequency on performance of three-phase packed-bed reactors

Wu, Ruiyun; McCready, Mark J.; Varma, Arvind

doi:10.1016/0009-2509(95)00186-9

Cited by 26 publications

(19 citation statements)

References 12 publications

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“…These hydrodynamic disturbances cause time-varying gasliquid, liquid-solid, and gas-solid heat and mass transport rates. Time-varying transport rates, which may have widely different frequencies depending upon reactor size, fluid properties, and packing configurations, can interact with the dynamics of the reaction systems and cause significant changes in selectivity and yield (Wu et al, 1994). Consequently, it is important to know the flow regime and the pertinent time scale and strength of fluctuations.…”

Section: Introductionmentioning

confidence: 99%

Origin of disturbances in cocurrent gas‐liquid packed bed flows

et al. 1995

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Section: Introductionmentioning

confidence: 99%

Origin of disturbances in cocurrent gas‐liquid packed bed flows

et al. 1995

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“…4,8,9 However, attempts to correlate experimental data with reactor models are limited by the absence of accurate kinetics. By determining the intrinsic kinetics of the system, a valuable tool for analyzing reactor design and evaluating catalyst performance would be provided.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Phenylacetylene Hydrogenation over Pt/γ-Al₂O₃ Catalyst

Wilhite

McCready

Varma

2002

Ind. Eng. Chem. Res.

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The kinetics of phenylacetylene hydrogenation over Pt/γ-Al 2 O 3 catalyst was investigated using stirred semibatch reactors over a range of temperatures, pressures, and initial phenylacetylene concentrations. Analysis verified that the results were obtained in the absence of transport limitations. Equations for the rates of change for phenylacetylene, styrene, and ethylbenzene were derived from a system of elementary reactions and tested against experimental data. The model was found to accurately predict rate dependencies on catalyst weight, initial concentration, and pressure. The kinetic parameters were determined by minimizing the error between the model predictions and the experimental results, and the obtained activation energy values compared favorably with those reported in the literature.

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“…operation in the slow mode. Very high period times would eventually result in reactor operation of two steady states, whereas for very low period times, the reaction and transfer processes in the reactor cannot respond to the fast input, resulting again in another pseudosteady-state [19].…”

Section: Introductionmentioning

confidence: 97%