Heat and Mass Transfer in Porous Particle in Thermal Plasma Flow

Abstract:

The paper presents research into heat and mass transfer in agglomerated particles exposed to the thermal plasma flow. The dynamic motion, heating and melting are considered for agglomerated particles. It is shown that the surface temperature of porous particles rather rapidly reaches the value of T_sur>T_melt starting from the area of their introduction into the plasma flow. This effect is determined by the low conductivity of porous particles and indicates to a great temperature difference between the particle surface and its nucleus. It is shown that hollow particles can be obtained from silica sand treated by thermal plasma at 6700 K and 515 m/s velocity. The particle surface displays no clear defects. According to the analysis of X-ray diffraction patterns, the obtained hollow particles have no diffraction peaks.

• Periodical: Key Engineering Materials (Volume 839)
• Pages: 178-183
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.839.178
• Online since: April 2020
• Authors: Valentin Shekhovtsov*, Oleg Volokitin, Gennady Volokitin, Nelly Skripnikova
• Keywords: Agglomerated Particles, Mass Transfer, Thermal Plasma Flow

References

[1] D. V. Dudina, S. B. Zlobin, N. V. Bulina, A. L. Bychkov, V. N. Korolyuk, V. Yu. Ulianitsky and O. I. Lomovsky, J. Eur. Ceram. Soc. 32 (2012) 815–821.

DOI: 10.1016/j.jeurceramsoc.2011.10.022

[2] Y. Tan, J. P. Longtin, and S. Sampath, Proc. Intern. Thermal Spray Conf. ITSC-2006, (2006) 240–248.

[3] Drozhzhev V S, Danilin L D et al. Proc. World of Coal Ash Conf., 11-15 April, Lexington, USA (2005) 115–116.

[4] Fomenko E V, Anshits N N et al. Doklady Physical Chemistry 435(2) (2010) 202–204.

[5] V. S. Bessmertnyj, V. P. Krokhin, A. A. Lyashko et al., Glass and Ceram., 8 (2001) 6 – 7.

[6] K. P. Sreekumar, S. K. Saxena, Y. Kumar et al., J. Phys.: Conf. Ser. 208 (2010) 012117.

[7] A.M. Hofmeister, A.G. Whittington, M. Pertermann, Contrib. Mineral. Petrol. 158 (2009) 381-400.

[8] M. Kawashita, N. Matsui, Zh. Li, T. Miyaza, Ions. J Mater Sci: Mater Med., 21 (2010) 1837–1843.

[9] V.A. Arkhipov, E.A. Kozlov, I.K. Zharova, S.S. Titov, A.S. Usanina, Arabian Journal of Geosciences, 9(2) (2016) 1–10.

[10] O.P. Solonenko, I.P. Gulyaev, A.V. Smirnov, Journal of Thermal Science and Technology, 6(2) (2011) 219–234.

[11] V.A. Vlasov, V.V. Shekhovtsov, O.G. Volokitin, G.G. Volokitin, N.K. Skripnikova, A.A. Klopotov, Russian Physics Journal, 61(4) (2018) 708–714.

DOI: 10.1007/s11182-018-1451-1

[12] I.P. Gulyaev, O.P. Solonenko, Experiments in Fluids, 54(1) (2013) 1432.

[13] W.E. Ranz, W.R. Marshall, Chem. Eng. Prog., 48(3) (1952) 141-146.

[14] M. Wang, N. Pan, Materials Science and Engineering, 63 (2008) 1-30.

[15] V. Shekhovtsov, O. Volokitin, N. Tsvetkov, G. Volokitin, N. Skripnikova, Materials Science Forum. 906 (2017) 131–136.

DOI: 10.4028/www.scientific.net/msf.906.131

[16] V.V. Shekhovtsov, O.G. Volokitin, V.I. Otmakhov, G.G. Volokitin, N.K. Skripnikova, Glass and Ceram. 75(1-2) (2018) 32–35.

DOI: 10.1007/s10717-018-0023-8

[17] O.G. Volokitin, V.V. Shekhovtsov, Glass Physics and Chemistry, 44(3) (2018) 251–253.