Résumé
Here we present a study combining sonoluminescence spectroscopy, and sonochemical activity, monitoring the effects of the gas inlet tube position on high-frequency sonolysis of various aqueous solutions. It has been observed that neither sonochemical activity, nor sonoluminescence intensity, is controlled solely by gas solubility. Changing the position of the gas inlet tube leads to opposite effects on sonoluminescence intensity and sonochemical activity, the former increases, while the latter decreases. Sonoluminescence spectroscopy indicates that more extreme conditions are reached at collapse with the gas inlet on the side, perhaps due to a more symmetrical collapse. Finally, it is shown in certain conditions that it is possible to favour the formation of some sonochemical products by positioning the gas inlet at different positions. This will have practical significance when upscaling sonochemical reactors for industrial applications.