6533b85afe1ef96bd12ba09a
RESEARCH PRODUCT
Influence of pressure on ultrasonic cavitation activity in room temperature ionic liquids: An electrochemical study
J.-y. HihnM. RebetezBouzid NaidjiA. Et TaouilLoïc Hallezsubject
Materials scienceAcoustics and Ultrasonics02 engineering and technology010402 general chemistryElectrochemistry01 natural sciencesInorganic Chemistrychemistry.chemical_compoundVaporizationChemical Engineering (miscellaneous)Environmental ChemistryRadiology Nuclear Medicine and imagingComputingMilieux_MISCELLANEOUSQuenchingAtmospheric pressureOrganic Chemistry021001 nanoscience & nanotechnology0104 chemical sciencesSolventchemistryChemical engineeringCavitationElectrodeIonic liquid0210 nano-technology[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]description
Abstract This paper provides proofs of the respective contributions of dissolved gases and solvent vapor on cavitation activity in sonoreactors. This activity can be detected by electrochemistry because the fluctuating events measured at the electrode surface are only linked to physical effects of cavitation. As ionic liquids present very low volatilities, their vaporization is reduced, and cavitation bubbles only depend on the presence of gases. Then, cavitation activity may be trigged by reactor atmosphere control. Applying severe depression within an irradiated ionic liquid medium contributes to removing dissolved gases, thus quenching cavitation activity. A specific sonoelectrochemical cell was developed for this purpose. These first results show, through electrochemical experiments, that cavitation activity markedly decreases from atmospheric pressure down to 26 kPa. Below 26 kPa, it remains very low and stable. The same experiments were carried out in acetonitrile as a witness. As expected, no depression effect is observed on cavitation activity as it is supported by the volatile solvent contribution.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-06-01 |