Venturi Scrubbing Techniques for Gas Pollutant Removal
Summary
Venturi scrubbers employ a converging–diverging nozzle to accelerate a polluted gas stream and atomise a liquid phase, creating a fine mist that maximises gas–liquid contact. As the gas passes through the throat, elevated turbulence and shear forces promote droplet formation and enhance particulate impaction and soluble gas absorption. Key design variables include throat geometry, liquid-to-gas ratio and pressure drop, each influencing collection efficiency, energy consumption and liquid usage. Advances in self-priming configurations, multi-injection arrangements and integrated cyclonic separators have extended applicability across flue-gas desulphurisation, syngas purification, waste-incineration off-gases and nuclear containment venting. Modern computational fluid dynamics (CFD) and analytical models enable precise control of droplet entrainment, wall-film behaviour and mass-transfer mechanisms, guiding design optimisation for stringent emission standards and sustainable industrial operation.
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Venturi Scrubbing Techniques for Gas Pollutant Removal publication trend
The graph below shows the total number of articles in venturi scrubbing techniques for gas pollutant removal across all publications each year (not limited to Nature Index journals).
Technical terms
Throat velocity: Speed of the gas–liquid mixture at the Venturi’s narrowest section, driving droplet formation and turbulence.
Liquid-to-gas ratio (L/G): Ratio of the scrubbing liquid flow rate to that of the contaminated gas, determining mist density and capture capacity.
Pressure drop: Difference in pressure across the Venturi, reflecting the energy input required for atomisation and correlating with removal performance.
Entrained droplet: A liquid droplet carried by the gas stream, essential for impaction and absorption processes.
Collection efficiency: Percentage of pollutant mass removed by the scrubber relative to the inlet concentration.
References
- Evaluation of the Effects of Body Forces and Diffusion Mechanisms on Droplet Separation in a Two-Phase Annular–Mist Flow. Applied Sciences (2024).
- Analytical studies on deposition and entrainment present in the Venturi nozzle two-phase flow. International Journal of Energy and Environmental Engineering (2021).
- Effect of Scrubbing Liquid height on the performance of Self Priming Venturi Scrubber. E3S Web of Conferences (2020).
- Effect of Liquid Injection Arrangements on Injection Flow Rate of a Laboratory-Scale Venturi Scrubber. Frontiers in Energy Research (2019).
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