Mass and heat transfer behavior of a new heterogeneous stirred tank reactor with serpentine tube baffles

Soliman, Mohamed S.; Nosier, S. A.; Hussein, Mohamed; Sedahmed, G.H.; Mubarak, A.A.

doi:10.1016/j.cherd.2017.06.012

Cited by 17 publications

(3 citation statements)

References 21 publications

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“…In case of axial flow impeller (45 o pitched blade turbine) the solution exiting the impeller travels down toward the bottom of the container and then travels radially downwards to reach the surface of the container bottom where it moves longitudinally parallel to the wall before it is recycled to the impeller region. The results agree with literature [6,10]. 172 Chemical, Energy and Environmental Engineering Fig.…”

Section: Resultssupporting

confidence: 91%

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The Effect of Using Baffles on the Rate of Mass Transfer of a Cylindrical Stirred Tank Reactor

Shokry

El-Gayar

El‐Fattah

et al. 2020

MSF

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Owing to the high mixing capacity, the stirred tank reactor is the key class of reactors in the chemical process industry and pharmaceutical industry. The mass transport nature of a batch stirred tank reactor with a fixed copper wall with a cylinder form was studied using copper dissolution in acidified dichromate which is controlled by diffusion. Variables analyzed included the speed of rotation of the impeller, the shape of the impeller and the physical specifications of the solution and the existence of baffles. The data were correlated for the conditions 3667.323 < Re < 34993.18 and 960 < Sc < 1364, for radial flow by the equation: Sh =0.3453 *Sc1/3*Re0.66 but for axial flow by the equation: Sh =0.5866 *Sc1/3*Re0.59. Through speed of rotation of the impeller increases,it allows the rate of mass transfer from the fixed bed to the solution to rise. The radial-flow turbine is more effective than the axial-flow turbine in increasing the rate of mass transfer. The usage of baffles plays a significant role in rising the rate of mass transfer. Using baffles; the correlation will be Sh =0.0769 *Sc1/3*Re0.84 for radial flow and Sh =0.1157 *Sc1/3*Re0.78 for axial flow. The purpose of this research is to estimate the rate of mass transport that can be required in corrosive reactions, and also to maximize the mass transfer rate that can be achieved in other processes, such as electroplating in presence of baffles.

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Section: Resultssupporting

confidence: 91%

“…Standard agitated vessel mixing performance depends on the geometry of the impeller, the physical properties of the solution and the existence of baffles. Baffles transform much of the tangential flux generated by rotation of the impeller to the more effective axial and radial flow [5,6].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Using Baffles on the Rate of Mass Transfer of a Cylindrical Stirred Tank Reactor

Shokry

El-Gayar

El‐Fattah

et al. 2020

MSF

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“… The length-to-diameter L/D ratio: varied over constant vessel volume to analyse different temperature distribution behaviours within the model, as illustrated in Table II. The ratio was varied according to experimental work on stirred tanks in literature [19][20][21].  Wall thickness t mm: taken as spacing between the reactor's wall and the jacket used.…”

Section: Materials and Methods A) Generalised Carbonation Reactormentioning

confidence: 99%

Optimisation of Carbonation Reactor Design Using Multiphysics Models for Precipitated Calcium Carbonate PCC Production

Elzaki¹

2020

IRJIET

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Temperature distributions in the carbonation reactor with an inner diameter of 4.23m and overall length of 7m is numerically modelled. This is motivated by the need to lower overall capital and operating costs, and to optimise the carbonation process performance, simultaneously. In this paper, computational simulations are used to design an industrial scale carbonation reactor 89.72m 3 consisting of an external cooling jacket. Several parameters are varied including reactor's geometry (6 shapes), wall thickness (100, 200, and 300mm), cooling jacket temperature (15, 25, and 35ºC), and material type. These parameters are varied interchangeably to compare temperature probe plots at a point probe (1.5,0) located closer to the cooling jacket region. Simulations in COMSOL ® Multiphysics 5.2a show that partial Carbon Steel AISI 4340 jackets with a 100mm distance, between vessel wall and outside wall of jacket, while operating at ambient temperature range of 20-25ºc, can achieve the required operating temperature i.e. 50±5ºC. Then, the precipitation process of the calcium carbonate (PCC) is maximised. This result in decreased bare materials' capital costs by 95.87% and 97.39% compared to Nickel and Titanium, respectively. The need for cooling the water for the jacket is eliminated, while operating costs are lowered by 25-50% per 10ºC. A simplified experimental setup is proposed to demonstrate the coupling of COMSOL ® simulations with experimental work can be a reliable and an effective method to evaluate the carbonation reactor model design.

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Impact of Bionic Fins on Supercritical CO2 Serpentine Microtube in Various Flow Directions

Yi,

Meng,

et al. 2024

Int J Thermophys

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Mass and heat transfer behavior of a new heterogeneous stirred tank reactor with serpentine tube baffles

Cited by 17 publications

References 21 publications

The Effect of Using Baffles on the Rate of Mass Transfer of a Cylindrical Stirred Tank Reactor

The Effect of Using Baffles on the Rate of Mass Transfer of a Cylindrical Stirred Tank Reactor

Optimisation of Carbonation Reactor Design Using Multiphysics Models for Precipitated Calcium Carbonate PCC Production

Impact of Bionic Fins on Supercritical CO2 Serpentine Microtube in Various Flow Directions

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