WITHDRAWN: Liquid–liquid flow regimes and mass transfer in various micro-reactors

Plouffe, Patrick; Roberge, Dominique M.; Macchi, Arturo

doi:10.1016/j.cej.2014.10.072

Cited by 8 publications

(3 citation statements)

References 58 publications

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“…Many researchers have tried to develop the empirical correlations to predict mass transfer coefficients. ,,− Some of them try to find out the relationship between overall mass transfer coefficients and energy dissipation. , Zhao and Susanti et al established empirical correlations, which predict a volumetric mass transfer coefficient well, with a deviation less than 20% using a typical system (water/ n -butanol). , Xu et al established suitable models of a mass transfer volume coefficient, considering the droplet forming stage and moving stage . Bai et al.…”

Section: Introductionmentioning

confidence: 99%

Determination of the Liquid/Liquid Mass Transfer Coefficient for Each Phase in Microchannels

Zhang

2018

Ind. Eng. Chem. Res.

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The overall mass transfer coefficient of liquid/liquid microflows has been extensively studied, but the liquid/liquid mass transfer coefficient for each phase in the microchannels has never been reported the best of our knowledge. In this work, the overall mass transfer coefficient and mass transfer coefficient for each phase (inside and outside droplet) of liquid–liquid microflows were determined using H2SO4/cyclohexanone oxime/n-hexane as the working system. Concentrated sulfuric acid (H2SO4) was used as the continuous phase, and the n-hexane solution containing a certain concentration of cyclohexanone oxime was used as the dispersed phase. A T-junction microchannel was used to generate liquid/liquid microflows. The influences of initial concentration of cyclohexanone oxime, two phase flow rates, and phase ratio were studied. The results showed that the mass transfer coefficient for each phase increased with the increasing of continuous phase rate. New mass transfer coefficient prediction models for each phase have been established, which could predict experimental results very well.

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Section: Introductionmentioning

confidence: 99%

Determination of the Liquid/Liquid Mass Transfer Coefficient for Each Phase in Microchannels

Zhang

2018

Ind. Eng. Chem. Res.

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“…Kashid et al [31] carried out many experiments in different types of micro-channels with different design parameters, such as the crosssection and the lengths of the sides and the downstream capillary, to investigate the flow regimes, the mass transfer performance, mixing efficiency, and energy consumption. The flow regimes and mass transfer rates in two curvature-based (SZ, TG) and three obstacle-based/hybrid micromixers (Spade, Venturi, Sickle) were investigated, and their conclusion indicated that the geometry itself influenced the flow regime and the rate of energy dissipation at a given flow rate [32]. The effect of the inlet flow conditions on the degree of mixing in a T-shaped micromixer was investigated by Galletti et al [33].…”

Section: Introductionmentioning

confidence: 99%

Removal of Cu²⁺ from Water Using Liquid‐Liquid Microchannel Extraction

Liu

Dai

et al. 2020

Chem Eng & Technol

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The very good extraction selectivity of Cu 2+ from water was demonstrated with a new microchannel equipment, by employing di-(2-ethylhexyl)phosphoric acid (D2EHPA) as an extractant and kerosene as a solvent. The effects of different experimental parameters on the extraction efficiency E, the volumetric mass transfer coefficient K L a, and the entrainment were experimentally investigated. The results showed that the extraction efficiency increased with increasing temperature, extractant concentration, phase ratio (organic/aqueous), and pH. The total flow rate, phase ratio, and pH were found to have a great effect on the mass transfer, whereas the temperature and the extractant concentration showed little effect.

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“…The efficiency of such a process mainly depends on the effectiveness of contact between the two immiscible phases. In batch systems, this contact depends on the agitator performance, but in a microchannel, this in turn depends on the flow pattern generated and the innovative physical structures implemented (Dessimoz et al, 2008;Kashid et al, , 2005Kashid and Agar, 2007;Plouffe et al, 2014;Xu et al, 2013). The generated flow pattern is a result of the fluid properties and the process and design parameters implemented (Dessimoz et al, 2008;Di Miceli Raimondi et al, 2014;Kashid and Agar, 2007).…”

Section: Introductionmentioning

confidence: 99%

Temperature controlled interval contact design for ultrasound assisted liquid–liquid extraction

John

Kuhn

Braeken

et al. 2017

Chemical Engineering Research and Design

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This work aims at constructing a design which integrates direct contact method (or a solid contact interface) with temperature control for chemical process applications. To realise this integration a two-step approach is proposed. Firstly temperature control is introduced by is achieved by suspending the tubing in a temperature controlled and sonicated liquid medium (indirect contact) and secondly the direct contact elements are introduced at regular intervals along the tubing. This design which incorporates both direct and indirect approaches of ultrasound transfer is termed the hybrid contact reactor. Two feasible configurations, open and closed intervals, were assessed. The hybrid reactors performed better than the indirect contact reactor (20 to 27 % higher yield) for lower residence times of < 45 s and similar for higher residence times. Comparing the two hybrid designs, even though their performance was similar the closed interval gave more stable and distinct yields. The latter design was scaled up to 10 times in volume with a 2 mm ID tube design. This design showed a relative performance similar to the interval contact design which gave the highest yields thus far for the same operating conditions.

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WITHDRAWN: Liquid–liquid flow regimes and mass transfer in various micro-reactors

Cited by 8 publications

References 58 publications

Determination of the Liquid/Liquid Mass Transfer Coefficient for Each Phase in Microchannels

Determination of the Liquid/Liquid Mass Transfer Coefficient for Each Phase in Microchannels

Removal of Cu²⁺ from Water Using Liquid‐Liquid Microchannel Extraction

Temperature controlled interval contact design for ultrasound assisted liquid–liquid extraction

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WITHDRAWN: Liquid–liquid flow regimes and mass transfer in various micro-reactors

Cited by 8 publications

References 58 publications

Determination of the Liquid/Liquid Mass Transfer Coefficient for Each Phase in Microchannels

Determination of the Liquid/Liquid Mass Transfer Coefficient for Each Phase in Microchannels

Removal of Cu2+ from Water Using Liquid‐Liquid Microchannel Extraction

Temperature controlled interval contact design for ultrasound assisted liquid–liquid extraction

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Product

Resources

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Removal of Cu²⁺ from Water Using Liquid‐Liquid Microchannel Extraction