A one-dimensional steady-state theoretical model has been developed to investigate system conditions under which density-driven flows may be anticipated and to what extent these flows can enhance reaction rates. Calculations were conducted for three aqueous electrolyte systems: potassium hydroxide, sulfuric acid, and copper sulfate in excess sulfuric acid. The theoretical results predict conditions under which volumetric reaction rates may be increased significantly by the occurrence of natural convection. The results indicate that double-porosity high-rate porous electrodes may be designed within which electrochemical reaction would occur primarily in the fine, high surface area, pores while natural convection of electrolyte would take place in the larger pore structure.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Materials Chemistry