Chitosan oligomers (O-chitosan) micrometric particles were produced from aqueous solution using a novel process, i.e. supercritical fluid assisted atomization introduced by hydrodynamic cavitation mixer (SAA-HCM).
This study was conducted to quantitatively investigate the macroscopic characteristics of the cavitation-driven atomization through a two dimensional transparent nozzle, which was designed to trigger more cavitation on one side than the other.
(1) The liquid jet breakup characteristics are strongly affected by the cavitation extent inside nozzle and better atomization characteristics are obtained on the side where cavitation is more promoted.
The sample to be examined was evaporated in an atomization apparatus and transformed into atomic condition.
Copper content was measured using air-acetylene flame atomization in a contrAA 700 atomic absorption spectrometer (Analytik Jena, Germany).
The cavitation has a beneficial effect on the atomization process and a negative one on the physical erosion generated by the vapor bubble collapse.
The homogeneous model-based CFD code of Chen and Heister was employed to model the internal flows, which indicated that a high pressure region upstream of the slot, large pressure fluctuations in the orifice, and long cavitation lengths are the favorable conditions for atomization.
A TSI constant output atomizer (model 3076) was used for atomization of aqueous solutions.
Atomization is the conversion of volatilized analytes into free atom.
Atomization – the compounds making up the sample are broken into free atoms.
