Advertisement

Heat and Mass Transfer

, Volume 55, Issue 12, pp 3689–3696 | Cite as

New approach to achieving smaller bubbles with various microwave irradiation modes

  • Yusuke AsakumaEmail author
  • Ryosuke Nakata
  • Shunsuke Nishijima
Original
  • 24 Downloads

Abstract

Previous studies have measured the sizes of bubbles in suspension during microwave irradiation to clarify the mechanism of bubble formation. Those results indicate that the particle number density and the dielectric constants of the particles and solvent are the most important factors determining bubble size during irradiation. The aim of this study is to determine whether bubble nucleation can be controlled by changing the microwave mode between continuous irradiation and the two-stage irradiation proposed in this study. The first irradiation of higher power rapidly accelerates bubble nucleation, whereupon the bubbles grow more slowly during the second irradiation of lower power. Because the absorbed microwave energy is distributed to the liquid–air interface of each highly suspended small bubble produced by the first irradiation, the absorbed energy per bubble decreases during the second irradiation. Finally, smaller bubbles are achieved at the target temperature. Because the bubble number density and size can be controlled by the rapid thermal response that is characteristic of microwaves, this method could be useful for preventing superheating and bumping during nano-particle synthesis.

Notes

References

  1. 1.
    Cao H, Wan M, Qiao Y, Zhang S, Li R (2012) Spatial distribution of sonoluminescence and sonochemiluminescence generated by cavitation bubbles in 1.2 MHz focused ultrasound field. Ultrason Sonochem 19:257–263CrossRefGoogle Scholar
  2. 2.
    Mizushima Y, Nagami Y, Nakamura Y, Saito T (2013) Interaction between acoustic cavitation bubbles and dispersed particles in a kHz-order-ultrasound-irradiated water. Chem Eng Sci 93:395–400CrossRefGoogle Scholar
  3. 3.
    Martín M, Montes FJ, Galán MA (2008) Bubbling process in stirred tank reactors I: agitator effect on bubble size, formation and rising. Chem Eng Sci 63:3212–3222CrossRefGoogle Scholar
  4. 4.
    Montante G, Horn D, Paglianti A (2008) Gas–liquid flow and bubble size distribution in stirred tanks. Chem Eng Sci 63:2107–2118CrossRefGoogle Scholar
  5. 5.
    Seya PM, Desjouy C, J-C Béra CI (2015) Hysteresis of inertial cavitation activity induced by fluctuating bubble size distribution. Ultrason Sonochem 27:262–267CrossRefGoogle Scholar
  6. 6.
    Asakuma Y, Munenaga T, Nakata R (2016) Observation of bubble formation behavior in water during microwave irradiation by DLS. Heat and Mass Transf 52:1833–1840CrossRefGoogle Scholar
  7. 7.
    Asakuma Y, Nakata R, Saptoro A (2017) Bubble formation in water with magnetite nano-particles during microwave irradiation. Chem Eng Process: Process Intensif 119:101–105CrossRefGoogle Scholar
  8. 8.
    Asakuma Y, Matsumura S, Saptoro A, Nakata R (2017) In-situ observation of nano-particle formation under different power of microwave irradiation. Cryst Res Technol 52:201700108CrossRefGoogle Scholar
  9. 9.
    Asakuma Y, Matsumura S, Asada M, Phan C (2018) Microwave special effect through bubble and surface tension profiles of ethylene glycol aqueous solution. Int J Thermophys IJOT-D-16-00387, 39:21Google Scholar
  10. 10.
    Chen Q, Hu Z, Yao FY-D, Liang H (2016) Study of two-stage microwave extraction of essential oil and pectin from pomelo peels. LWT Food Sci Technol 66:538–545CrossRefGoogle Scholar
  11. 11.
    Chen L, Qiu G, Peng B, Guo M, Zhang M (2015) (K0.5Na0.5)(Nb1−xTax)O3 ceramics with a higher d33: preparation from a two-stage microwave hydrothermal process. Ceram Int 41:13331–13340CrossRefGoogle Scholar
  12. 12.
    Song Z, Yang Y, Zhou L, Liu L, Zhao X (2017) Gaseous products evolution during microwave pyrolysis of tire powders. Int J Hydrog Energy 42:18209–18215CrossRefGoogle Scholar
  13. 13.
    Khachatourian AM, Golestani-Fard F, Sarpoolaky H, Vogt C, Toprak MS (2015) Microwave assisted synthesis of monodispersed Y2O3 and Y2O3:Eu3+ particles. Ceram Int 41:2006–2014CrossRefGoogle Scholar
  14. 14.
    Hu S, Lu C, Wang W, Ding M, Xu Z (2013) Synthesis of monodisperse erbium aluminum garnet (EAG) nanoparticles via a microwave method. J Rare Earths 31:490–496CrossRefGoogle Scholar
  15. 15.
    Horikoshi S, Osawa A, Sakamoto S, Serpone N (2013) Control of microwave-generated hot spots. Part IV. Control of hot spots on a heterogeneous microwave-absorber catalyst surface by a hybrid internal/external heating method. Chem Eng Process Process Intensif 69:52–56CrossRefGoogle Scholar
  16. 16.
    Wang N, Wang P (2016) Study and application status of microwave in organic wastewater treatment – a review. Chem Eng J 283:193–214CrossRefGoogle Scholar
  17. 17.
    De Bruyn M et al (2017) Subtle microwave-induced overheating effects in an industrial demethylation reaction and their direct use in the development of an innovative microwave reactor. J Am Chem Soc 139:5431–5436CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Chemical EngineeringUniversity of HyogoHimejiJapan

Personalised recommendations