Mass transfer in the chemosorption of CO2 in a membrane microbubble apparatus

Акимов, В. В.; Dmitriev, E. A.; Trushin, A. M.

doi:10.1134/s0040579511060017

Cited by 8 publications

(5 citation statements)

References 14 publications

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“…Wei et al examined the influence of the superficial gas velocity on the liquid-phase flow rate, gas holdup, and K la and proposed an empirical correlation that could predict these values. Akimove et al used a chemical absorption method to study the mass transfer performance between phases in a membrane distribution reactor and established a mathematical model that could predict the material exchange parameters during the microbubbling process.…”

Section: Development and Application Of Membrane Reactorsmentioning

confidence: 99%

Porous Membrane Reactors for Liquid-Phase Heterogeneous Catalysis

Jiang

Liu

Xing

et al. 2021

Ind. Eng. Chem. Res.

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Reaction and separation are the core of chemical and petrochemical production processes. The problems of resource and energy waste and environmental pollution caused by the low efficiency of reaction and separation have become increasingly prominent and have been the bottlenecks, with regard to sustainable development of the industry. The development of membrane reactor technology to achieve efficient conversion and separation has become an important research direction. In this Review, porous membrane reactors are divided into three types: contactor, distributor, and extractor types, based on the function of the membrane. The latest research progress of our group in liquid-phase catalytic reactions and the research status in this field are reviewed. For the contactor-type membrane reactor, the design and preparation of the catalytic membrane are discussed from three aspects: membrane configuration, preparation method, and membrane surface modification. For the distributor-type membrane reactor, the focus is on the influences of the membrane microstructure and operating parameters on the droplet/bubble formation and mass transfer, as well as the application of distributor-type membrane reactors. For the extractor-type membrane reactor, after the configuration of the membrane reactor is introduced, the research progress of extractor-type membrane reactors for liquid-phase catalytic reactions is discussed from two aspects: the synergistic control of the catalysis and membrane separation processes, and the mechanism and control of membrane fouling. The industrialization of extractor-type membrane reactors is described. Finally, the future challenges and development directions of porous membrane reactors applied to liquid-phase catalytic reactions are discussed.

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Section: Development and Application Of Membrane Reactorsmentioning

confidence: 99%

Porous Membrane Reactors for Liquid-Phase Heterogeneous Catalysis

Jiang

Liu

Xing

et al. 2021

Ind. Eng. Chem. Res.

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“…The small size of microbubbles promotes a larger interfacial area to maximize contact between the gas and liquid (Akimov et al, 2011). As an example, the interfacial area of a 25 µm bubble compared to a 2 mm bubble is 80 times higher for a given volume of gas.…”

Section: Increased Interfacial Areamentioning

confidence: 99%

Microbubbles and their application to ozonation in water treatment: A critical review exploring their benefit and future application

John

Brookes

Carra

et al. 2020

Critical Reviews in Environmental Science and Technology

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Ozonation is a widely applied water treatment process, used for oxidation of contaminants, as well as for the disinfection of water. However, the conventional ozonation process demands a high energy requirement and deep tanks to ensure effective mass transfer and oxidation.Microbubble technologies have emerged which have the potential to improve gas-liquid contacting. Microbubbles have diameters of 1-100 µm, while conventional bubbles used in ozonation are between 2 -6 mm. Microbubbles have many favorable characteristics that make them suitable for ozonation. In this review, the attributes of microbubbles for ozonation have been compared with those of conventional bubbles. The higher interfacial area and lower rise velocity of microbubbles compared with conventional bubbles means that ozone in the gas phase can be more efficiently transferred into the liquid phase. This is due to a higher contact time and increased contact area of the bubble with the bulk liquid. The analysis reveals that the volumetric mass transfer coefficient can be significantly enhanced through the use of microbubbles. In addition, the steady state dissolved ozone concentration was positively impacted by the use of microbubbles. Microbubbles were shown to be able to oxidize a broader range of organic compounds more quickly than for conventional bubbles. However, the review highlighted that comparison of microbubbles with conventional bubbles is not always carried

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“…(30) can be further simplified as: 2 where r 0 is the initial radius of the jet when z = 0. (20), the left term is the inertia force, the middle term the electronic force acting on the charged jet, and the last term is the viscous force.…”

Section: Newtonian Flowmentioning

confidence: 99%

“…Thin liquid films, such as soap bubbles, have been found wide applications in medicine [1], chemistry [2], food engineering [3], and nanotechnology [4] as well, but little was known that a polymer bubble can be used for nanofiber fabrication. When a polymer bubble under an electrostatic field ruptures, the surface tension leads to surface minimization of some film fragments, and daughter bubbles are formed [5,6], while the electrostatic force ejects some fragments upwards, the process is called as the bubble electrospinning [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Review on fiber morphology obtained by bubble electrospinning and blown bubble spinning

et al. 2012

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Here we show an intriguing phenomenon in the bubble electrospinning process that the ruptured film might be stripped upwards by an electronic force to form a very thin and long plate-like strip, which might been received in the metal receiver as discontinuous backbone-like wrinkled materials, rather than smooth nano-fibers or microspheres. The processes are called the bubble electrospinning. The electronic force can be replaced by a blowing air, and the process is called as the blown bubble spinning. We demonstrate that the size and thickness of the ruptured film are the crucial parameters that are necessary to understand the various observations including beads and nanoporous materials. We identify the conditions required for a ruptured film to form discontinuous structure, and a critical width of the ruptured film to form a cylindrical fiber, above which a long and thin plate-like strip might be obtained, and a criterion for oscillatory jet diameter, which leads to bead morphology of the obtained fibers. The space of the adjacent beads depends on the fiber size. We anticipate our assay to be a starting point for more sophisticated study of the bubble electrospinning and the blown bubble spinning and for mass-production of both nanofibers and nanoscale discontinuous materials

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Mass transfer in the chemosorption of CO2 in a membrane microbubble apparatus

Cited by 8 publications

References 14 publications

Porous Membrane Reactors for Liquid-Phase Heterogeneous Catalysis

Porous Membrane Reactors for Liquid-Phase Heterogeneous Catalysis

Microbubbles and their application to ozonation in water treatment: A critical review exploring their benefit and future application

Review on fiber morphology obtained by bubble electrospinning and blown bubble spinning

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