Microchannel Devices for Efficient Contacting of Liquids in Solvent Extraction

TeGrotenhuis, Ward E.; Cameron, Richard J.; Butcher, Mark; Martin, Peter M.; Wegeng, Robert S.

doi:10.1081/ss-100100691

Cited by 32 publications

(30 citation statements)

References 9 publications

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“…[1][2][3][4][5] Such characteristics can be presented in terms of the transport coefficients (including the effective advection coefficient, the dispersion coefficient, and the effective Sherwood number). The objectives of developing transport coefficients are first, to determine the important parameters that control the mass flux released from the chemical species source and second, to include the determined parameters in a transport sub-model in large-scale simulation, and design of optimal strategies.…”

Section: Introductionmentioning

confidence: 99%

A reduced‐order model for chemical species transport in a tube with a constant wall concentration

Dejam

Chen

2017

Can J Chem Eng

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A two-dimensional advection-diffusion model accompanied with a parabolic velocity profile of Poiseuille flow is considered for the chemical species transport in a tube with a constant wall concentration. The Reynolds decomposition technique is applied to reduce it to an equivalent one-dimensional model for advective-dispersive transport in a tube through which the effective advection coefficient, the dispersion coefficient, and the effective Sherwood number are developed for the problem under study. The derived and the classical Taylor models are also compared in order to find the difference between the two arrangements. The reduced-order model for the transport equation shows that the effective advection coefficient increases, whereas the dispersion coefficient in the tube decreases as compared to the classical Taylor equation. The effective Sherwood number for the steady state form of the developed model is found to be only a function of the Peclet number, which varies in the range of 3.215 Sh 4. These results find application in design of experiments and improve our understanding of mass transfer in microfluidic devices.

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Section: Introductionmentioning

confidence: 99%

A reduced‐order model for chemical species transport in a tube with a constant wall concentration

Dejam

Chen

2017

Can J Chem Eng

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“…Thus, liquid/liquid extraction experiments are one of the fundamental applications of a microchannel chip and have been studied extensively in the past decade: extraction of organic dyes, metal ions, metal chelates, and so on. 23 Among more sophisticated experiments, furthermore, counter-current liquid/liquid extraction in a microchannel chip 24 and liquid/liquid extraction of a synthetic product in a microreactor system have been also demonstrated. 25,26 Liquid/liquid extraction processes can also be in situ monitored by spatially-resolved spectroscopy along solution flow in a microchannel: fluorescence 10,11 or thermal lens spectroscopy.…”

Section: ·1 Microspectroscopymentioning

confidence: 99%

Polymer Channel Chips as Versatile Tools in Microchemistry

2008

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The paper describes the fabrication and chemical applications of polymer microchannel chips, with special reference to in situ observations of the chemical/physical processes occurring in polystyrene microchannel chips, including those in microchannel-microelectrode/microheater chips. On the basis of absorption/fluorescence microspectroscopy and microelectrochemistry techniques, we show some characteristic features of liquid/liquid extraction, electrochemical responses, and photochemical/electrochemical/thermal synthetic reactions in microchannel chips.

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“…Besides, the flow is stabilized because of the solid support between two fluids. The solid contactors are porous membrane 59,60 and metal sheets with sieve like structure. 61 Similar to parallel flow, the mass transfer in both cases is only by diffusion and the flow is under laminar flow regime dominated by capillary forces.…”

Section: Microstructured Reactors (Msr)mentioning

confidence: 99%

Microstructured Reactors for Multiphase Reactions: State of the Art

Kashid

Kiwi‐Minsker

2009

Ind. Eng. Chem. Res.

203

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The manufacture of chemicals in microstructured reactors (MSR) has become recently a new branch of chemical reaction engineering focusing on process intensification and safety. MSR have an equivalent hydraulic diameter up to a few hundreds of micrometers and, therefore, provide high mass-and heat-transfer efficiency increasing the reactor performance drastically, compared to the conventional one. This article provides a comprehensive overview of the state of the art of the MSR applied for multiphase reactions. The reactions are classified based on the number of phases involved: fluid-fluid, fluid-solid, and three phase reactions. In the first part of the review, limitations of conventional reactors are discussed in brief. Furthermore, different types of MSR and their advantages with respect to their conventional counterparts are described. Particular attention is given to the identification of the parameters that control the flow pattern formed in microcapillaries regarding the mass-transfer efficiency. Case studies of various multiphase reactions carried out in MSR are discussed in detail.

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Microchannel Devices for Efficient Contacting of Liquids in Solvent Extraction

Cited by 32 publications

References 9 publications

A reduced‐order model for chemical species transport in a tube with a constant wall concentration

A reduced‐order model for chemical species transport in a tube with a constant wall concentration

Polymer Channel Chips as Versatile Tools in Microchemistry

Microstructured Reactors for Multiphase Reactions: State of the Art

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