Heat and mass transfer in confined jet plasma reactor with peripheral vortex flow

Astashov, A. G.; Самохин, А. В.; Алексеев, Н. В.; Litvinova, I. S.; Tsvetkov, Yu. V.

doi:10.1088/1742-6596/1134/1/012004

Cited by 2 publications

(3 citation statements)

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“…To date, many computational and experimental studies have been performed on the influence of various factors and parameters in the working zone of a reactor on the processes of formation, growth, and size distribution of silicon nanoparticles under thermal plasma conditions [18][19][20]. ISSN 2664-9969…”

Section: Research Resultsmentioning

confidence: 99%

“…The formation of a layer of sintered material will eventually lead to overlapping of the reactor cross section and a complete disruption of the technological regime of the process [16,17]. To obtain the final product of plasma synthesis in the form of a nanopowder, in which nanoparticles retain the properties determined by the conditions of their formation in a gas flow, it is necessary to exclude or minimize the possibility of physical and chemical transformations in the layer of deposited particles [18,19]. This can be provided if the temperature in the layer is below a certain threshold value, above which chemical and phase transformations of the nanoparticle material can occur in the layer, as well as their growth.…”

Section: Research Of Existing Solutions To the Problemmentioning

confidence: 99%

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Consideration of the possibility of large-scale plasma-chemical production of nanosilicon for lithium-ion batteries

Петров

Bondarenko

Sato³

2022

TAPR

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The object of research is the process of obtaining silicon nanomaterials for lithium-ion batteries of energy storage devices, and the subject of research is the technology of gas-phase plasma-chemical synthesis for the production of Si-nanoparticles. In the course of the study, numerical simulation methods were used, which made it possible to determine the parameters of temperature fields, velocities and concentrations. To study the processes of synthesis of nanopowders, a plasma reactor with an electric arc plasma torch of a linear scheme and using an argon-hydrogen mixture as a plasma-forming gas was developed. To analyze the influence of an external magnetic field on the control of the plasma jet parameters, a series of experiments was carried out using an electric arc plasma torch on plasma laboratory facilities with a power of 30 and 150 kW. The influence of a magnetic field on the process of formation and evaporation of a gas-powder flow in a plasma jet was studied by determining the configuration, geometric dimensions, and structure of the initial section of the jet. In this case, the dispersed material – silicon powder was fed to the plasma torch nozzle section according to the radial scheme. Experimental confirmation of the phenomenon of elongation of the high-temperature initial section of the plasma jet in a longitudinal magnetic field has been obtained. The experimental results indicate that the creation of a peripheral gas curtain significantly changes the characteristics of heat and mass transfer in the reactor. It should be expected that for optimization it is possible to exclude the deposition of nanosilicon particles on the walls of the reactor and provide conditions for continuous operation. The effect of two-phase flow, heat transfer, and mass flow of nanoparticles, including the surface of a plasma reactor with limited jet flow, in the processes of obtaining silicon nanopowders has been studied. This made it possible to correct a number of technological characteristics of the process of constructive design of the actions of plasma synthesis of nanopowders. The patterns obtained can be used for constructive and technological design in the creation and development of a pilot plant for high-performance production of nanosilicon powders.

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Section: Research Resultsmentioning

confidence: 99%

Section: Research Of Existing Solutions To the Problemmentioning

confidence: 99%

Consideration of the possibility of large-scale plasma-chemical production of nanosilicon for lithium-ion batteries

Петров

Bondarenko

Sato³

2022

TAPR

View full text Add to dashboard Cite

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“…This minimum energy depends only on the concentration of solutes regardless of any specific technology, mechanism, or number of stages [98,99]. Simple thermodynamic calculations reveal that the MTES is ideally 0.79 kWh/m 3 for full and 1.09 kWh/m 3 for 50% recovery of freshwater from typical seawater [100][101][102][103][104][105]. Using the second law efficiency, this value jumps to 1.9 kWh/m 3 [51].…”

Section: Thermodynamics Of Desalinationmentioning

confidence: 99%

Looking Beyond Energy Efficiency: An Applied Review of Water Desalination Technologies and an Introduction to Capillary-Driven Desalination

Ahmadvand

Abbasi

Azarfar

et al. 2019

Water

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Most notable emerging water desalination technologies and related publications, as examined by the authors, investigate opportunities to increase energy efficiency of the process. In this paper, the authors reason that improving energy efficiency is only one route to produce more cost-effective potable water with fewer emissions. In fact, the grade of energy that is used to desalinate water plays an equally important role in its economic viability and overall emission reduction. This paper provides a critical review of desalination strategies with emphasis on means of using low-grade energy rather than solely focusing on reaching the thermodynamic energy limit. Herein, it is argued that large-scale commercial desalination technologies have by-and-large reached their engineering potential. They are now mostly limited by the fundamental process design rather than process optimization, which has very limited room for improvement without foundational change to the process itself. The conventional approach toward more energy efficient water desalination is to shift from thermal technologies to reverse osmosis (RO). However, RO suffers from three fundamental issues: (1) it is very sensitive to high-salinity water, (2) it is not suitable for zero liquid discharge and is therefore environmentally challenging, and (3) it is not compatible with low-grade energy. From extensive research and review of existing commercial and lab-scale technologies, the authors propose that a fundamental shift is needed to make water desalination more affordable and economical. Future directions may include novel ideas such as taking advantage of energy localization, surficial/interfacial evaporation, and capillary action. Here, some emerging technologies are discussed along with the viability of incorporating low-grade energy and its economic consequences. Finally, a new process is discussed and characterized for water desalination driven by capillary action. The latter has great significance for using low-grade energy and its substantial potential to generate salinity/blue energy.

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Heat and mass transfer in confined jet plasma reactor with peripheral vortex flow

Cited by 2 publications

References 0 publications

Consideration of the possibility of large-scale plasma-chemical production of nanosilicon for lithium-ion batteries

Consideration of the possibility of large-scale plasma-chemical production of nanosilicon for lithium-ion batteries

Looking Beyond Energy Efficiency: An Applied Review of Water Desalination Technologies and an Introduction to Capillary-Driven Desalination

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