Toward a mechanistic understanding of microfluidic droplet-based extraction and separation of lanthanides

Zhang, Hao; Wang, Huizhi; Luo, Xing; Leung, Dennis Y.C.; Pang, Qishou; Xu, Hong; Zhang, Li; Xuan, Jin

doi:10.1016/j.cej.2018.09.043

Cited by 26 publications

(13 citation statements)

References 33 publications

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“…From the ratio of material to liquid, when the ratio of plastic to liquid was 1:8, the extraction rate reached a higher value, and as the solvent increased, the extraction rate did not increase significantly. This may be because the solvent extraction was the limiting factor which had been removed when the feed to liquid ratio was 1:8 [33]. If the content of the material was too high, the diffusion process of OPO in water would be subject to higher mass transfer resistance.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Corn Starch Bio-Active Edible Packaging Films Based on Zein Incorporated with Orange-Peel Oil

et al. 2019

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Zein, corn starch (CS), and orange-peel oil (OPO) extracted from orange peels were used to prepare novel corn starch/orange-peel oil/zein nanocapsules (OZN) bio-active food packaging materials. The results showed that the OZN were round, smooth and in compact morphology with an average diameter of 102.7 ± 10.5 nm from OPO and zein (3:10, w/w). By testing the turbidity and atomic force microscopy (AFM) of OZN and the mechanical properties and water vapor permeability of the composite films, the comprehensive properties of composite films with different mass ratios were analyzed. It showed that the addition of OZN improved the mechanical and moisture barrier properties and extended the release time of OPO. When the ratio of OZN and CS is 5:5, the highest elongation at break and tensile strengths is achieved, at values of 30.91% ± 2.52% and 12.19 ± 1.97 MPa respectively. The relative release concentration of OPO was highest at a ratio of 5/5, and over time it would last longer to maintain a higher release concentration. Besides, the oxidation resistance of the composite film was good, especially when the ration of starch CS to OZN was 5/5, it had the highest DPPH radical scavenging activity (30.16% ± 1.69%). Thus, it can be used as a bio-active edible food packaging film to ensure the safety of food products and reduce environmental pressure to some extent.

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Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Corn Starch Bio-Active Edible Packaging Films Based on Zein Incorporated with Orange-Peel Oil

et al. 2019

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“…Further, to quantify the effect of slug flow distribution on FAME yield, one parameter is defined, namely, residence time. Several researchers pointed out that in case of slug flow in microchannel, slug characteristics like slug velocity and slug length play an important role. Zhang et al also noticed that in situ slug velocity is proportional to two‐phase mixture velocity.…”

Section: Effect Of In Situ Volume Fraction On Fame Yield In Slug Flowmentioning

confidence: 99%

“…Several researchers pointed out that in case of slug flow in microchannel, slug characteristics like slug velocity and slug length play an important role. Zhang et al also noticed that in situ slug velocity is proportional to two‐phase mixture velocity. The proportionality constant lies from 0.94 to 1.27 for a range of diameter of channels 0.8 to 1.8 mm.…”

Section: Effect Of In Situ Volume Fraction On Fame Yield In Slug Flowmentioning

confidence: 99%

Biodiesel production in a serpentine minireactor—Effect of flow distribution

et al. 2019

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Summary The present work aims to find out the influence of flow pattern on pressure drop and fatty acid methyl ester (FAME) yield in a reactive system. Experiments are carried out with Jatropha oil and methanol by using potassium hydroxide (KOH) as catalyst for biodiesel production in two serpentine minireactors made of glass capillary of 2‐mm internal diameter. One is having a circular cross section, and the other is annulus. Slug flow, slug with droplet flow, and dispersed flow are observed in both the reactors. Effects of flow distribution on pressure drop and FAME yield have been studied. FAME yield of 98.5% is observed in both reactors for a molar ratio 20 (methanol to Jatropha oil), and the time for this yield in the first reactor is 16.6 minutes and that for the second reactor is 7.7 minutes. Higher yield also resulted in lower pressure drop due to lower viscosity of biodiesel in comparison with oil.

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“…Even under the condition of high total throughput (100 mL·min −1 ) and relatively short residence time (0.029 s), the extraction‐reaction efficiency can be approximately equal to the co‐current equilibrium extraction. Zhang and his co‐authors have carried out numerical analyses in a micro extraction system to understand the lanthanide extraction properties, which indicated that microfluidic extraction configuration possesses excellent prospect in effective separation of lanthanides. The high separation factor (3.53) for La 3+ /Eu 3+ can be obtained at the flow velocity of 10 mm·s −1 .…”

Section: Background and Originality Contentmentioning

confidence: 99%

Green Effectively Enhanced Extraction to Produce Yttrium(III) in Slug Flow Microreactor

Guo

Chen

et al. 2020

Chin. J. Chem.

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of main observation and conclusion Process reinforcement research was carried out in Y-junction slug flow microreactors under variable conditions, using EHEHPA (2-ethylhexyl phosphonic acid mono-2-ethylhexyl) to extract yttrium(III) from hydrochloric acid solution. The influence of pH and flow rate on the extraction-reaction efficiency, slug size, mass transfer performance was assessed. The experimental results showed that maximum extraction-reaction efficiency of 91.85% can be achieved in the smallest microreactor (residence time is 11.25 s), which was significantly higher than traditional extraction requiring more than 10 min. The slug length tended to decrease with the increase of pH and flow rate. Volumetric mass transfer coefficients for the slug flow microreactors were found to be in the range of 1.39×10 −1 -1.642 s −1 that is several orders of magnitude higher as compared to traditional extractors, which testified the beneficial effects of Y-junction slug flow microreactor. Significant mass transfer reinforcement has prompted the use of microreactor as a suitable alternative to traditional extractors, which can advantageously improve the economic and environmental development of mineral processing. www.cjc.wiley-vch.deHe et al.

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Toward a mechanistic understanding of microfluidic droplet-based extraction and separation of lanthanides

Cited by 26 publications

References 33 publications

Preparation and Characterization of Corn Starch Bio-Active Edible Packaging Films Based on Zein Incorporated with Orange-Peel Oil

Preparation and Characterization of Corn Starch Bio-Active Edible Packaging Films Based on Zein Incorporated with Orange-Peel Oil

Biodiesel production in a serpentine minireactor—Effect of flow distribution

Green Effectively Enhanced Extraction to Produce Yttrium(III) in Slug Flow Microreactor

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