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- Title
Determination of the Metastable Zone Width and Nucleation Parameters of Succinic Acid for Electrochemically Induced Crystallization.
- Authors
Kocks, Christian; Krekel, Christina Maria; Gausmann, Marcel; Jupke, Andreas
- Abstract
Electrified downstream processes for biotechnologically produced carboxylic acids reduce waste salt generation significantly and make biotechnological production ecologically and economically more attractive. In order to design, optimize, scale-up and control electrochemically induced crystallization processes, knowledge of the metastable zone width (MSZW) is essential. An optical observation approach of nucleation processes close to the electrode and determination of the MSZW is presented. This work presents a method for MSZW measurements for electrochemically induced pH-shift crystallization processes by monitoring the nucleation, the saturation pH value and saturation concentration for different current densities. The measured MSZWs for electrochemically induced pH-shift crystallization are narrow due to the foreign surface, gas bubbles and electrode surface, and rising current densities lead to even smaller MSZW. Nucleation parameters are estimated from MSWZ data, adapting the classical approach of Nývlt to electrochemically induced crystallization.
- Subjects
SUCCINIC acid; NUCLEATION; CRYSTALLIZATION; CARBOXYLIC acids; ELECTROCRYSTALLIZATION
- Publication
Crystals (2073-4352), 2021, Vol 11, Issue 9, p1090
- ISSN
2073-4352
- Publication type
Article
- DOI
10.3390/cryst11091090