Diffusion properties of aqueous slurries in evaporative spray drying of copper (II) chloride dihydrate

This study examines the evaporative heat transfer and diffusive mass transfer of a droplet of CuCl₂ solution. The validation of a new predictive model involves comparisons with experimental data from previous studies of different fluids based on non-dimensional analysis. The study provides new insight about the effects of different concentrations of water on the CuCl₂ slurry drying at low to moderate air temperatures. Predictive correlations of heat and mass transfer are developed for the aqueous solution, subject to various drying conditions. The analysis is performed for moist air in contact with a sprayed aqueous solution of copper (II) chloride dihydrate CuCl₂·(2H₂O)]. Results are presented and discussed for the drying processes.