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Atomization Characteristics of Hydrogen Peroxide Solutions in Electrostatic Field
Xuefeng Huang1, Ling Sheng1, Yibin Lu1
1Institute of Energy, Department of Physics, Hangzhou Dianzi University, Hangzhou 310018, China.
Micromachines
|May 28, 2022
Summary
Electrostatic atomization effectively produces fine hydrogen peroxide (H2O2) droplets for industrial use. Lowering H2O2 concentration significantly reduces droplet size, with 8 wt.% yielding the smallest diameters.
Area of Science:
- Applied Physics
- Chemical Engineering
- Materials Science
Background:
- Hydrogen peroxide (H2O2) has dual applications as a sterilant and a green propellant.
- Industrial applications often require fine H2O2 droplets, commonly produced via spraying.
- Minimizing effective surface tension is key to achieving fine droplet formation.
Purpose of the Study:
- To investigate electrostatic atomization using a needle-ring electrode configuration for H2O2 spraying.
- To analyze the influence of operational parameters and H2O2 concentration on droplet breakup.
- To understand the underlying electrostatic atomization mechanism through dimensionless parameter analysis.
Main Methods:
- Utilized electrostatic atomization with a needle-ring electrode setup.
- Varied electric field intensity, nozzle size, volume flow rate, and H2O2 concentration (8-35 wt.%).
- Calculated Reynolds (Re), Weber (We), and Ohnesorge (Oh) numbers to analyze atomization mechanisms.
Main Results:
- Optimized conditions yielded a minimum average droplet diameter of 92.8 μm for 35 wt.% H2O2.
- Droplet diameter decreased with decreasing H2O2 concentration, reaching 67.4 μm at 8 wt.%.
- Experimental results aligned with theoretical analysis, indicating minimum droplet size at 8 wt.% H2O2.
Conclusions:
- Electrostatic atomization is effective for producing fine H2O2 droplets.
- H2O2 concentration critically impacts droplet size due to its effect on physical properties.
- Optimal atomization performance, yielding the smallest droplets, occurs at lower H2O2 concentrations (e.g., 8 wt.%).
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