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Modeling Control over the Size and Phase Composition of Submicron Particles of Titanium Dioxide Synthesized in a Flow Plasma-Chemical Reactor

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Abstract

A mathematical and experimental modeling of the process of synthesis under nonequilibrium conditions of a fine powder of titanium dioxide anatase crystalline modification with a combination of reaction zones and counter hardening has been carried out. The formation of ultrafine particles occurs in regions with large values of the convective derivative of temperature (~105 K/s). The mass-average particle size was 10–70 nm in calculations and 32–45 nm in experiments. The anatase content of the powder in calculations was 70–90% and in experiments ~83%. This method allows control over the phase composition and particle size of the synthesized titanium dioxide powder used as photocatalysts, in particular, when treating wastewater from organic waste and air from harmful impurities.

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Funding

This study was financially supported by the Russian Foundation for Basic Research (project no. 13-08-00153a).

NOTATION

d0

initial particle diameter, nm

dm

mass average particle diameter, nm

dN

particle average particle diameter, nm

dβ

average effective particle size, nm

Q1

rate of jet of air from a plasmotron, g/s

Q2

rate of TiCl4 jet, g/s

Q3

rate of quenching jet, g/s

Sβ

specific surface area of powder sample, m2/g

T1

plasma-jet temperature, K

T2

TiCl4 jet temperature (TiCl4 + O2), K

T3

temperature of quenching jet, K

ρp

material density of powder, g/cm3

SUBSCRIPTS AND SUPERSCRIPTS

p

particles

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Authors and Affiliations

  1. Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia

    S. M. Aulchenko & E. V. Kartaev

Authors
  1. S. M. Aulchenko
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  2. E. V. Kartaev
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Correspondence to S. M. Aulchenko.

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Aulchenko, S.M., Kartaev, E.V. Modeling Control over the Size and Phase Composition of Submicron Particles of Titanium Dioxide Synthesized in a Flow Plasma-Chemical Reactor. Theor Found Chem Eng 54, 588–591 (2020). https://doi.org/10.1134/S0040579520040144

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  • DOI: https://doi.org/10.1134/S0040579520040144

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