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Separation Science and Technology Volume 55, 2020 - Issue 13
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Precipitation

Efficiency of electrostatic precipitation of NiO nanoparticles dispersed by atomization

Alessandro Estarque de OliveiraDepartment of Chemical Engineering, Federal University of São Carlos, São Carlos, SP, BrazilORCID Iconhttps://orcid.org/0000-0001-7900-2874View further author information
ORCID Icon &
Vádila Giovana GuerraDepartment of Chemical Engineering, Federal University of São Carlos, São Carlos, SP, BrazilCorrespondence[email protected]
ORCID Iconhttps://orcid.org/0000-0002-0096-6329View further author information
ORCID Icon
Pages 2400-2409 | Received 17 Dec 2018, Accepted 29 May 2019, Published online: 09 Jun 2019
 
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ABSTRACT

The dispersion of metal oxide nanoparticles by pneumatic atomization of oxide suspensions has rarely been used in laboratory-scale research on electrostatic precipitation, due to the insolubility of the oxides under ambient conditions, the particle agglomeration and sedimentation in aqueous mixtures. Therefore, the aim of this work was to evaluate the performance of a wire-plate electrostatic precipitator in the collection of NiO nanoparticles produced by nebulization of suspensions pretreated with ultrasonic bath, which resulted in reproducible aerosol concentrations and particle size distributions. Increase of the voltage and decrease of the gas flow rate improved the charging and collection efficiencies.

Acknowledgements

The authors are grateful for the financial support provided by CNPq and Capes.

Additional information

Funding

This work was supported by grants from CNPq (131744/2017-8) and CAPES (001).

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