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Pulsed ultrasound for temperature control and clogging prevention in micro-reactors.
Claire Delacour1, Cecile Lutz2, Simon Kuhn1
1KU Leuven, Department of Chemical Engineering, Celestijnenlaan 200F, 3001 Leuven, Belgium.
Ultrasonics Sonochemistry
|May 16, 2019
Summary
Pulsed ultrasound prevents micro-reactor clogging by reducing particle size. This method also significantly lowers temperature increases compared to continuous sonication, offering a less invasive approach.
Area of Science:
- Chemical Engineering
- Materials Science
Background:
- Ultrasonic micro-reactors are used to prevent clogging from solid materials.
- Continuous sonication can cause excessive heat and microchannel degradation.
Purpose of the Study:
- Investigate pulsed ultrasound as a less invasive method for preventing micro-channel clogging.
- Control temperature increase during ultrasonic treatment in micro-reactors.
Main Methods:
- Studied barium sulfate particle precipitation in a continuous micro-reactor.
- Quantified the impact of pulsed ultrasound parameters (ratio, frequency, power) on particle size, pressure, and temperature.
- Compared results to non-sonicated experiments.
Main Results:
- Pulsed ultrasound effectively prevented microchannel clogging by reducing particle size, similar to continuous sonication.
- Decreasing the effective treatment ratio from 100% to 12.5% reduced temperature rise from 7°C to 1°C.
Conclusions:
- Pulsed ultrasound is a viable, less invasive alternative to continuous sonication for preventing micro-channel clogging.
- Optimizing pulsed ultrasound parameters allows for effective clogging prevention while managing temperature increases.
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