Electrodialyss membrane processes for chemical separation and organic acid recovery Dingchang Yang, Magdalena Titirici, Qilei Song Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK Organic acid separation and recovery are important for a variety of industrial processes, from biomass conversion to plastic recycling. Conventional separation processes are usually based on precipitation by strong acid, which is energy intensive and causes environmental pollution. Electro-membrane process, such as electrodialysis, has emerged as a promising alternative technology for organic acid separation and recovery at low energy consumption. Development of ion-exchange membranes with precise ion and molecular selectivity is a challenge with broad benefits. This poster presentation will give an overview of the challenges and opportunities for electro-membrane processes for chemical separation. A variety of electrodialysis stack configurations and process designs will be presented, including bipolar membrane electrodialysis. Recent development of synthetic chemistries of ion exchange membranes and their potential use in chemical separation will be reviewed. Finally, the challenge and approaches to improving electrodialysis separation efficiency through membrane design and process optimization are investigated. References 1. He, J.-c., et al., An electrodialysis-based coupling technique for simultaneous reclamation of waste acid and cleaner production of organic acid. Journal of Membrane Science, 2021. 638 : p. 119683. 2. Handojo, L., et al., Electro-membrane processes for organic acid recovery. RSC Advances, 2019. 9 (14): p. 7854-7869.
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