Authors: Schmalenberg, Mira
Weick, Lena K.
Kockmann, Norbert
Title: Nucleation in continuous flow cooling sonocrystallization for coiled capillary crystallizers
Language (ISO): en
Abstract: Nucleation in continuously operated capillary coiled cooling crystallizers is experimentally investigated under the influence of ultrasound. It was found that there is no sharp boundary but rather a transition zone for nucleation under sonication. For this purpose, a tube with an inner diameter of 1.6 mm and a length of 6 m was winded in a coiled flow inverter (CFI) design and immersed into a cooled ultrasonic bath (37 kHz). The CFI design was chosen for improved radial mixing and narrow residence time distribution, which is also investigated. Amino acid l-alanine dissolved in deionized water is employed in a supersaturation range of 1.10 to 1.46 under quiet and sonicated conditions. Nucleation is non-invasive detected using a flow cell equipped with a microscope and camera.
Subject Headings: Coiled flow inverter
Continuous nucleation
Cooling crystallization
Capillary flow
Non-invasive nucleation detection
Subject Headings (RSWK): Wechselrichter
Issue Date: 2021-03-24
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