Electrostatic Precipitation Technologies for Particle Removal
Summary
Electrostatic precipitation technologies employ electric fields to charge aerosol particles in a gas stream and subsequently collect them on oppositely charged electrodes. Dry precipitators use a high‐voltage corona discharge to impart charges to particles, which migrate under Coulombic forces to collection plates. Wet electrostatic precipitators introduce a liquid film on the collection surface, improving removal of sticky or corrosive aerosols and reducing re‐entrainment. Advances in electrode design, dielectric coatings and pre‐charging stages have expanded the operating envelope of these devices, enabling efficient capture of submicron particles with minimal pressure drop. Computational models now predict the impact of particle resistivity, dust‐layer growth and flow geometry on performance, guiding scale‐up for flue‐gas treatment, industrial emission control and indoor‐air purification. Integration with filtration media, acoustic or ionic‐wind agglomeration and hybrid gas–liquid systems addresses challenges posed by high humidity, variable particle composition and the need to limit ozone by-products. Globally, electrostatic precipitators contribute to compliance with air‐quality standards, protect human health and support decarbonisation efforts by enabling cleaner combustion and resource recovery.
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Electrostatic Precipitation Technologies for Particle Removal publication trend
The graph below shows the total number of articles in electrostatic precipitation technologies for particle removal across all publications each year (not limited to Nature Index journals).
Technical terms
Electrostatic precipitator (ESP): A device using electric fields to charge and collect particles from a gas stream on electrodes.
Corona discharge: Ionisation of gas near a high‐voltage electrode that imparts charges to airborne particles.
Collection efficiency: The fraction of particles removed from the gas stream by the precipitator, often expressed as a percentage.
Dielectric coating: An insulating layer applied to electrodes to improve voltage tolerance and particle capture, reducing sparking and ozone generation.
Particle resistivity: Electrical resistance of deposited particles affecting charge dissipation and migration velocity within the precipitator.
References
- Electrostatic Precipitators as an Indoor Air Cleaner—A Literature Review. Sustainability (2020).
- Highly efficient removal of sulfuric acid aerosol by a combined wet electrostatic precipitator. RSC Advances (2018).
- Application of acoustic agglomeration to enhance air filtration efficiency in air-conditioning and mechanical ventilation (ACMV) systems. PLOS ONE (2017).
- Systematic Approach to Optimization of Submicron Particle Agglomeration Using Ionic-Wind-Assisted Pre-Charger. Aerosol and Air Quality Research (2015).
- A Numerical Investigation of the Effect of Dust Layer on Particle Migration in an Electrostatic Precipitator. Aerosol and Air Quality Research (2020).
- A holistic performance assessment of duct-type electrostatic precipitators. Journal of Cleaner Production (2022).
- Industrial Application of a Deep Purification Technology for Flue Gas Involving Phase-Transition Agglomeration and Dehumidification. Engineering (2018).
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