Trickle‐bed reactors

Satterfield, Charles N.

doi:10.1002/aic.690210202

Cited by 460 publications

(248 citation statements)

References 53 publications

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“…By plotting the natural logarithm of the ratio of the CO 2 -concentrations in the in-and outlet gas stream respectively versus the length of the bed, k L a GL can be calculated from the slope using equation (2). However, to calculate k L a GL from equation (2), knowledge of the speci c gas-liquid contact area a GL is required.…”

Section: Volumetric Liquid-side Mass Transfer Coef Cientmentioning

confidence: 99%

The Performance of Structured Packings in Trickle-Bed Reactors

Frank

Kuipers

Versteeg

et al. 1999

Chemical Engineering Research and Design

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A n experimental study was carried out to investigate whether the use of structured packings might improve the mass transfer characteristics and the catalyst effectiveness of a trickle-bed reactor. Therefore, the performances of a structured packing, consisting of KATAPAK elements, and a dumped packing, consisting of small diameter spherical particles, have been compared for both a chemisorption process and a process where a heterogeneously catalysed chemical reaction is carried out. The chemisorption of CO 2 in aqueous amine solutions and the hydrogenatio n of a-methylstyrene catalysed by palladium on c -alumina were chosen as model reactions, respectively. The performance of the trickle-bed reactor was quanti ed by measuring the speci c gas-liquid contact area and the volum etric liquid-side mass transfer coef cient in the case of the chemisorption process and the conversion rate in the case of the heterogeneously catalysed chemical reaction. These parameters were measured for both packing types as a function of a number of process parameters. In this paper, the experimental results are presented and a comparison is made of the performances of the two packing types for both types of processes. Both packing types showed similar mass transfer characteristics as well as volumetric conversion rates. However, the structured packing showed a much higher contact ef ciency as well as a much higher catalyst effectiveness. A signi cant improvement is therefore expected when a structured packing is used with a higher speci c geometrical area than that applied in this study. Furthermore, the structured packing is favoured in the case of fast exothermic liquid-phase reactions.

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Section: Volumetric Liquid-side Mass Transfer Coef Cientmentioning

confidence: 99%

The Performance of Structured Packings in Trickle-Bed Reactors

Frank

Kuipers

Versteeg

et al. 1999

Chemical Engineering Research and Design

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“…Since the educt does not have to be evaporated, this reactor type can be used for several different educts. The design of such a reactor can be greatly simplified [38]. Assuming ideal conditions and a first-order reaction, measurements of the reaction rate constants of experiments in stirred autoclaves can be transferred one-to-one to trickle-bed reactors [38].…”

Section: Continuous Hydrogenationmentioning

confidence: 99%

New Developments in Chemical Engineering for the Production of Drug Substances

Behr

Brehme

Ewers³

et al. 2004

Engineering in Life Sciences

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The pharmaceutical industry is moving towards a profitability gap between increasing costs and decreasing prices. Finally, management has understood that mergers and acquisitions, high throughput screening, and biotechnology alone will not save the companies' earnings. Therefore, classical approaches like the optimization of production technologies for drug substances, that might help to increase profitability, are receiving increasing attention. This paper shows how the combination of innovative components will guide the way to very efficient and cost-effective production. The first component is the design and manufacturing of production facilities. The second component is a process streamlining of the production process. The key technologies discussed here are process control and miniplant technology. For these technologies a brief outlook on future trends is given.

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“…These are slurry reactors, in which fine particles of a catalyst are suspended in a very well mixed two-phase system of gas and liquid (Shah, 1979). Similarly, there is a very broad range of processes carried out in three-phase fixed-bed reactors (called trickle-bed reactors) where the concurrently flowing phases (gas and liquid) are brought into contact with solid catalyst particles in order to perform the desired chemical transformation (Satterfield, 1975;Bartelmus et al, 1998, Burghardt et al, 1999.…”

Section: Introductionmentioning

confidence: 99%

Eulerian Three-Phase Flow Model Applied to Trickle-Bed Reactors

Burghardt¹

2014

Chemical and Process Engineering

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The majority of publications and monographs present investigations which concern exclusively twophase flows and particulary dispersed flows. However, in the chemical and petrochemical industries as well as in refineries or bioengineering, besides the apparatuses of two-phase flows there is an extremely broad region of three-phase systems, where the third phase constitutes the catalyst in form of solid particles (Duduković et al., 2002; Martinez et al., 1999) in either fixed bed or slurry reactors. Therefore, the goal of this study is to develop macroscopic, averaged balances of mass, momentum and energy for systems with three-phase flow. Local instantaneous conservation equations are derived, which constitute the basis of the method applied, and are averaged by means of Euler's volumetric averaging procedure. In order to obtain the final balance equations which define the averaged variables of the system, the weighted averaging connected with Reynolds decomposition is used. The derived conservation equations of the trickle-bed reactor (mass, momentum and energy balance) and especially the interphase effects appearing in these equations are discussed in detail.

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Trickle‐bed reactors

Cited by 460 publications

References 53 publications

The Performance of Structured Packings in Trickle-Bed Reactors

The Performance of Structured Packings in Trickle-Bed Reactors

New Developments in Chemical Engineering for the Production of Drug Substances

Eulerian Three-Phase Flow Model Applied to Trickle-Bed Reactors

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