Power Requirements for Pulse Generation in Pulse Columns

Jealous, A.C.; Johnson, Homer F.

doi:10.1021/ie50546a021

Cited by 91 publications

(70 citation statements)

References 3 publications

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“…According to the investigated conditions, the correlation of Jealous and Johnson [58] has been used to calculate this term expressed by: and tube diameter (m) respectively and C D the orifice coefficient for the flow through the baffle hole and is assumed to be 0.6 for fully developed conditions.…”

Section: Mean Energy Dissipation Ratementioning

confidence: 99%

Liquid–liquid dispersion in a continuous oscillatory baffled reactor – Application to suspension polymerization

Lobry

Lasuye²,

Gourdon

et al. 2015

Chemical Engineering Journal

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible.Liquid-liquid dispersion in a continuous oscillatory baffled reactor -Application to suspension polymerization b s t r a c tReducing energy costs, improving safety, minimizing waste are the current aims of chemical engineering. Process intensification in fine chemistry has been extensively studied but less work refers to heterogeneous reactions involving two liquid phases. This paper focuses on batch to continuous suspension polymerization transposition and especially on the liquid-liquid dispersion step. The main features of suspension polymerization reaction are based on (i) the initial liquid-liquid dispersion requiring a controlled size and narrow distribution and (ii) on the control of the final particle size during the agglomeration step by avoiding fouling which is a bottleneck for continuous flow. For the continuous transposition, liquid-liquid dispersion and reaction studies are carried out in continuous oscillatory baffled reactor (COBR) which is a multipurpose reactor. Its suitability to overcome the bottlenecks is demonstrated through the investigation of the oscillating and flow conditions or the dispersed phase holdup. A controlled droplet size distribution can be achieved. Oscillation is the main parameter responsible for droplet breakage. The suitable conditions to obtain stable dispersion are determined. For one of the first times, COBR is used for suspension polymerization.

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Section: Mean Energy Dissipation Ratementioning

confidence: 99%

Liquid–liquid dispersion in a continuous oscillatory baffled reactor – Application to suspension polymerization

Lobry

Lasuye²,

Gourdon

et al. 2015

Chemical Engineering Journal

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“…This pressure drop is given by the sum of its inertial and frictional components, viz. (Jealous & Johnson, 1955):…”

Section: Power Characteristics Of An Obcmentioning

confidence: 99%

Flotation in a novel oscillatory baffled column

Anderson

Harris

Deglon

2009

Minerals Engineering

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“…The oscillatory Reynolds number describes the intensity of mixing applied to the column, while the Strouhal number is the ratio of column diameter to stroke length, measuring the e ective eddy propagation (Ni & Gough, 1997). Using the quasi-steady approach proposed initially by Jealous & Johnson (1955) the time-averaged power density in an OBC can be estimated by…”

Section: Introductionmentioning

confidence: 99%

Gas hold-up and bubble diameters in a gassed oscillatory baffled column

Oliveira

2001

Chemical Engineering Science

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In this paper attempts are made to address how bubble behaviour in a batch oscillatory ba ed column (OBC) contributes to the overall measured enhancement in mass transfer. A CCD camera is used to measure the bubble size distribution and the gas hold-up in the OBC. The experimental results of Sauter mean diameter and gas hold-up are correlated as a function of the power dissipation and super cial gas velocity, in order to allow for comparisons with published correlations for the mass transfer coe cient. In general, an increase in the oscillatory velocity causes an increase in the hold-up and a decrease in the Sauter mean diameter. Furthermore, we are able to show that the changes in the gas hold-up contribute more than the mean bubble size to the control of the mass transfer coe cient. ?

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Power Requirements for Pulse Generation in Pulse Columns

Cited by 91 publications

References 3 publications

Liquid–liquid dispersion in a continuous oscillatory baffled reactor – Application to suspension polymerization

Liquid–liquid dispersion in a continuous oscillatory baffled reactor – Application to suspension polymerization

Flotation in a novel oscillatory baffled column

Gas hold-up and bubble diameters in a gassed oscillatory baffled column

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