Characterization of mixing in reactor systems through analysis of regional tracer dilution data obtained with a gamma camera

Castellana, Frank S.; Friedman, M. I.; Spencer, Jordan L.

doi:10.1002/aic.690300206

Cited by 11 publications

(3 citation statements)

References 10 publications

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“…This RTD contained information on segregation and its parameters were correlated with rotational speed. Flow visualization studies using the clock reactions of Denbigh and Danckwerts (82,83), whereby color change occurs after a specified time upon mixing of reactants, and regional tracer dilution studies by gamma camera (84) have also been employed to characterize mixing in stirred tank reactors. The problem is that second-order reactions are not sensitive enough to segregation.…”

Section: Stirred Tank Reactormentioning

confidence: 99%

Tracer Methods in Chemical Reactors. Techniques and Applications

Duduković

1986

Chemical Reactor Design and Technology

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Section: Stirred Tank Reactormentioning

confidence: 99%

Tracer Methods in Chemical Reactors. Techniques and Applications

Duduković

1986

Chemical Reactor Design and Technology

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“…These tracer experiments have been carried out to determine the flow characteristics, the RTD and age distributions of the fluid elements inside a continuously operated system. Castellana et al [2] developed a technique to study the flow patterns and mixing in a two-dimensional, multiple-inlet vessel, using radionuclide tracers and a gamma camera. This provided a visual description of the flow patterns while the data characterized the distribution of tracer in the regions of the flow system.…”

Section: Introductionmentioning

confidence: 99%

Characterization of mixing and residence time distributions in nozzle‐type reactors

1989

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Studies of flow characteristics and residence time distribution, (RTD), have been undertaken in a range of geometrically similar, laboratory nozzle-type reactors. High-speed cine-photography was employed to record the complex phenomena of liquid mixing in the reactor and also to record on film the colour of an injected tracer solution leaving in the effluent. A novel atomic absorption spectrophotometric (AAS) technique was applied to transform the results of the latter film into response curves. This technique provided detailed quantitative data on the residence time distributions (RTD) for different feed rates. A multiparameter model, comprising a network of CSTR's and plug flows, was developed to simulate the experimental response data. Good agreement was obtained between model predictions and experimental results. The experimental technique and theoretical approach are recommended for analyzing the flow patterns and mixing mechanisms in such reactors.

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“…The gamma camera was brought into a new dimension of imaging with its introduction into the industrial field. For many engineering applications, this apparatus has been shown to be excellent for observation of flow and mixing in reactor vessels [1], for the measurement of liquid film thickness on the surface of a rotating disk [2], for the characterization of cross flow in multi-channel mixing assemblies [3], and for imaging oil displacement in thin slabs of porous media [4].…”

Section: Introductionmentioning

confidence: 99%