Abstract
A model is proposed that describes the transfer of ions and the process of water dissociation in a system with a bipolar membrane and adjacent diffusion layers. The model considers the transfer of four types of ions: the cation and anion of salt and the products of water dissociation—hydrogen and hydroxyl ions. To describe the process of water dissociation, a model for accelerating the dissociation reaction with the participation of ionogenic groups of the membrane is adopted. The boundary value problem is solved numerically using COMSOL® Multiphysics 5.5 software. An analysis of the results of a numerical experiment shows that, at least in a symmetric electromembrane system, there is a kinetic limitation of the water dissociation process, apparently associated with the occurrence of water recombination reaction at the of the bipolar region. An interpretation of the entropy factor (β) is given as a characteristic length, which shows the possibility of an ion that appeared because of the water dissociation reaction to be removed from the reaction zone without participating in recombination reactions.
Funder
Russian Science Foundation
Subject
Filtration and Separation,Chemical Engineering (miscellaneous),Process Chemistry and Technology
Reference67 articles.
1. Kemperman, A.J.B. (2000). Handbook Bipolar Membrane Technology, Twente University Press.
2. Hutter-Byszewski, C., and Bogeatzes, A.S. (1988). AQUATECH system-a commercial process to recycle spent pickle liquor. Iron Steel Eng., 40–44.
3. Electrodialysis processes with bipolar membranes (EDBM) in environmental protection-A review;Tongwen;Resour. Conserv. Recycl.,2002
4. Production of organic acids by bipolar electrodialysis: Realizations and perspectives;Bailly;Desalination,2002
5. Bipolar-membrane electrodialysis: Applications of electrodialysis in the food industry;Bazinet;Trends Food Sci. Technol.,1998
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献