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TY - THES AU - Kocks, Christian Uwe TI - Entwicklung und Charakterisierung eines Prototyps für die elektrochemische pH-Shift Kristallisation von biotechnologisch hergestellter Bernsteinsäure PB - Rheinisch-Westfälische Technische Hochschule Aachen VL - Dissertation CY - Aachen M1 - RWTH-2024-09388 SP - 1 Online-Ressource : Illustrationen PY - 2024 N1 - Veröffentlicht auf dem Publikationsserver der RWTH Aachen University N1 - Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2024 AB - The raw material transition requires a change in the value chains in the chemical industryfrom fossil to renewable or recycled carbon sources to meet sustainability pledges. Platformchemicals such as carboxylic acids represent a promising opportunity to establishsynthesis routes based on industrial biotechnology. However, biotechnological productioncan rarely compete with established petrochemical processes. To render the biotechnological production of platform chemicals economically and ecologically competitive, new separation techniques are required for the downstream processing of these molecules. Electrochemical separation techniques show great potential for this purpose since the use of electricity drastically reduces the use of auxiliary chemicals and avoids saline wastewater,which is one major economic and ecological disadvantage of the conventional processing of biotechnologically produced carboxylic acids. Within this work, a prototype for the electrochemical pH-shift crystallization, integrated into a biotechnological production process of succinic acid, is presented, and experimentally characterized regarding techno-economical aspects. Therefore, the necessary thermodynamical property data of succinic acid are measured, and the crystallization kinetics, nucleation, and growth are investigated for the electrochemical pH-shiftcrystallization. Based on these crystallization studies a model for the electrochemical pH-shift crystallization of succinic acid was developed, which allows the estimation of the crystallization process and the design of the prototype. Finally, the developed prototype for the electrochemical pH-shift crystallization of succinicacid is characterized to identify operating conditions for the electrochemical pH-shift crystallization. Within the operating window, the proposed crystallization process is evaluated based on the measured solid-liquid equilibrium, supersaturation, energy consumptionand electrochemical protonation efficiency. Additionally, the results of discontinuous and continuous electrochemical pH-shift crystallization experiments from artificial andreal process solutions are shown, which highlight the potential of the electrochemical pH-shift crystallization as a waste-free and economically attractive downstream processfor succinic acid production. LB - PUB:(DE-HGF)11 DO - DOI:10.18154/RWTH-2024-09388 UR - https://publications.rwth-aachen.de/record/994570 ER -