Using a bio-inspired copper complex to investigate reactive mass transfer around an oxygen bubble rising freely in a thin-gap cell

Felis, Francisco; Strassl, Florian; Laurini, Larissa; Dietrich, Nicolas; Billet, Anne-Marie; Roig, Véronique; Herres‐Pawlis, Sonja; Loubière, Karine

doi:10.1016/j.ces.2019.07.045

Cited by 16 publications

(34 citation statements)

References 44 publications

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“…Previously we used a SuperFocus mixer to investigate the kinetics of fast reactions by continuous flow. [12c], Due to the short mixing time of this setup it was possible to analyze the formation of [Cu 2 O 2 (btmgp) 2 ]I 2 , a temperature sensitive guanidine‐stabilized bis(µ‐oxido) species at room temperature . In contrast, the reaction of 1 with O 2 at room temperature is slower with a faster decay (for decay k obs = 0.06 s –1 at 25 °C, see below).…”

Section: Resultsmentioning

confidence: 99%

“…While it turned out that 1 is not suitable for the investigation of its reactivity with dioxygen in bubbly flows this is different for an iron peroxido complex reported by some of us previously. [12c], Besides the problems with protic solvents, rates for formation and decay of reactive intermediates need to be in a time window to allow their study in an industrial setup such as a bubble flow column.…”

Section: Discussionmentioning

confidence: 99%

“…The SuperFocus mixer setup was described in detail previously including analyses of the results. [12c], …”

Section: Methodsmentioning

confidence: 99%

“…In industrial applications for catalytic oxidations with dioxygen it is necessary to understand the formation of the “dioxygen adduct” complexes within large bubble columns . Kinetic data are necessary for the determination of the hydrodynamics and mass transport mechanisms to allow the calculation/optimization of the overall bubbly flow processes.…”

Section: Introductionmentioning

confidence: 99%

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Kinetic Investigation of the Reaction of Dioxygen with the Copper(I) Complex [Cu(Pim^iPr2)(CH₃CN)]CF₃SO₃ {Pim^iPr2 = Tris[2‐(1,4‐diisopropylimidazolyl)]phosphine}

et al. 2020

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Model complexes for copper proteins such as hemocyanin or tyrosinase have been investigated in detail during the last four decades due to their potential to become valuable catalysts for selective oxidations of organic substrates. However, so far most of these compounds can only be investigated in aprotic solvents at lower temperatures. Therefore, industrial applications on a larger scale are still missing. In contrast the copper(I) complex with the ligand tris[2‐(1,4‐diisopropylimidazolyl)]phosphine can form a quite stable dinuclear copper peroxido complex in the protic solvent methanol at room temperature. The kinetic analysis of the reaction of [Cu(PimiPr2)(CH3CN)]CF3SO3 with dioxygen in methanol is reported. The results allowed to obtain rate constants and activation parameters (ΔH# = 25 ± 2 kJ mol–1 and ΔS# = –121 ± 8 J mol–1 K–1) for the formation of the reactive intermediate, a mononuclear copper superoxido complex, prior to the consecutive reaction to a dinuclear peroxido complex.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…The SuperFocus mixer setup was described in detail previously including analyses of the results. [12c], …”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Kinetic Investigation of the Reaction of Dioxygen with the Copper(I) Complex [Cu(Pim^iPr2)(CH₃CN)]CF₃SO₃ {Pim^iPr2 = Tris[2‐(1,4‐diisopropylimidazolyl)]phosphine}

et al. 2020

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“…Additionally, laser‐induced fluorescence (LIF) measurements of the concentration field around the bubble can be carried out by adding a dye and quenching its fluorescence after contact with gas transferred into the liquid phase 13. Furthermore, tailored chemical reaction systems can be applied, visualizing the local mass transfer by a color changing reaction 16–18. While all of these techniques have their advantages and drawbacks, they are all limited to optically accessible systems and rely on tracers or chemicals, contaminating the investigated system.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Resonance Imaging for Non‐invasive Study of Hydrodynamics Inside Gas‐Liquid Taylor Flows

et al. 2021

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Multiphase flows are of major importance in today's industrial processes as many products originate from gas‐liquid reactions. The hydrodynamics within the wake behind the bubbles is essential as product selectivity is determined by the residence times in these mixing zones. Magnetic resonance imaging (MRI) offers a wide range of options for the investigation of multiphase flows. Here, non‐invasive MRI flow measurements of buoyancy‐driven N2 Taylor bubbles, spatially fixed inside a countercurrent flow of water, are performed. An experimental setup is presented, enabling the generation of Taylor bubbles inside a horizontal bore MRI scanner. Furthermore, a suitable MRI sequence allowing a time‐dependent analysis of the present flow field is described. The obtained MRI results are qualitatively compared to PIV images acquired in the same setup.

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Hierarchically Structured Components: Design, Additive Manufacture, and Their Energy Applications

Wang

Xuan

Zhang

et al. 2021

Adv Materials Technologies

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term solutions are urgently needed before adequate supply of the renewable energy. [1,2] Improvement of efficiency in the energy production and consumption processes is a key factor to address these problems. Meanwhile, the large reaction rate is a key factor to meet the industrial energy requirements. [1][2][3][4][5] Mass transport intensification is an effective method to improve the efficiency and reaction rate in the adsorptions, chemical reactions, and electrochemical reactions, which plays crucial roles in the gas (H 2 , CH 4 , CO 2 , etc.) storage, [6,7] energy conversion, [8] and energy storage. [3,9,10] Recently, novel batteries [2,3,[11][12][13] and microreactors [8,[14][15][16][17][18] for the gas (H 2 , CH 4 , CO 2 , etc.) storage [6,7] and energy conversion [8] have been developed to meet the requirements of high efficiency and rates. In these devices, the mass transport intensification is particularly important to acquire the high selectivity, large reaction rate, great conversion efficiency. [2,8,19,20] The mass transfer steps in the monolithic adsorbents, structured catalysts, and shaped electrodes are similar. Therefore, it is possible to use an identical term to describe the monolithic adsorbents, structured catalysts, and shaped electrodes for convenience to discuss the mass transfer processes. Herein, we use the hierarchically structured components (HSCs) to describe the structures which are comprised of designed channels and matrix between channels, where the matrix is made from functional materials (ceramics, carbon, metals, etc.) with pores in the size from nanometer to sub-millimeters, as illustrated in Figure 1a. In the flow batteries and fuel cells, the assembly of bipolar plate and electrode is regarded as HSC.Generally, the reactants undergo four steps (distribution, adsorption, acceleration, and reaction) in the HSC, as shown in Figure 1b-e. The distribution starts as soon as the reactant flows into the inlet. In this step, the reactant is distributed across the HSC through the designed channels, as shown in Figure 1b. [21,22] Subsequently the fluid is adsorbed by the macropores (>50 nm) which act as buffers for the reactants in the matrix, shown in Figure 1c. [23] As shown in Figure 1d,e, the reactants are accelerated by the mesopores (2-50 nm) and transferred to the micropores (<2 nm) which provide high surface area for the active sites. [23][24][25] After reaction at the active sites, the products are transferred by the mesopores and macropores to the outlet, successively. [26,27] Therefore, the Pursuing high energy efficiency and reaction rate is an effective direction in mitigating the energy and climate crisis. Mass transfer intensification is a powerful approach to enhance the energy efficiency and reaction rate in the energy conversion and storage processes. The nature-inspired channels are outstanding tools to uniformly distribute the reactants, fast remove products, and reduce the diffusion distance for mass transfer intensification in monolithic adsorbents, structured catal...

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Using a bio-inspired copper complex to investigate reactive mass transfer around an oxygen bubble rising freely in a thin-gap cell

Abstract: Using a bio-inspired copper complex to investigate reactive mass transfer around an oxygen bubble rising freely in a thin-gap cell.

Cited by 16 publications

References 44 publications

Kinetic Investigation of the Reaction of Dioxygen with the Copper(I) Complex [Cu(Pim^iPr2)(CH₃CN)]CF₃SO₃ {Pim^iPr2 = Tris[2‐(1,4‐diisopropylimidazolyl)]phosphine}

Kinetic Investigation of the Reaction of Dioxygen with the Copper(I) Complex [Cu(Pim^iPr2)(CH₃CN)]CF₃SO₃ {Pim^iPr2 = Tris[2‐(1,4‐diisopropylimidazolyl)]phosphine}

Magnetic Resonance Imaging for Non‐invasive Study of Hydrodynamics Inside Gas‐Liquid Taylor Flows

Hierarchically Structured Components: Design, Additive Manufacture, and Their Energy Applications

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Using a bio-inspired copper complex to investigate reactive mass transfer around an oxygen bubble rising freely in a thin-gap cell

Abstract: Using a bio-inspired copper complex to investigate reactive mass transfer around an oxygen bubble rising freely in a thin-gap cell.

Cited by 16 publications

References 44 publications

Kinetic Investigation of the Reaction of Dioxygen with the Copper(I) Complex [Cu(PimiPr2)(CH3CN)]CF3SO3 {PimiPr2 = Tris[2‐(1,4‐diisopropylimidazolyl)]phosphine}

Kinetic Investigation of the Reaction of Dioxygen with the Copper(I) Complex [Cu(PimiPr2)(CH3CN)]CF3SO3 {PimiPr2 = Tris[2‐(1,4‐diisopropylimidazolyl)]phosphine}

Magnetic Resonance Imaging for Non‐invasive Study of Hydrodynamics Inside Gas‐Liquid Taylor Flows

Hierarchically Structured Components: Design, Additive Manufacture, and Their Energy Applications

Contact Info

Product

Resources

About

Kinetic Investigation of the Reaction of Dioxygen with the Copper(I) Complex [Cu(Pim^iPr2)(CH₃CN)]CF₃SO₃ {Pim^iPr2 = Tris[2‐(1,4‐diisopropylimidazolyl)]phosphine}

Kinetic Investigation of the Reaction of Dioxygen with the Copper(I) Complex [Cu(Pim^iPr2)(CH₃CN)]CF₃SO₃ {Pim^iPr2 = Tris[2‐(1,4‐diisopropylimidazolyl)]phosphine}