Stefan’s Problem Applied to Solution Crystallization

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Antonio J. A. Meirelles²  Maria Regina Wolf-Maciel³  José Marcos F. Silva³  Carlos E. Lopes¹ 

[1]Laboratory of Fermentation Processes, Department of Antibiotics, Federal University of Pernambuco (UFPE)

[2]Laboratory of Extraction, Applied Thermodynamics and Equilibrium (EXTRAE), Faculty of Food Engineering, State University of Campinas (UNICAMP)

[3]Laboratory of Separation Process Development, Faculty of Chemical Engineering, State University of Campinas (UNICAMP)

关键词: Separation Processes;    Mass Transfer;    Stefan’s Problem;    Solution Crystallization;   

DOI  :  10.1252/jcej.39.940

来源: Maruzen Company Ltd

【 摘 要 】

References(25)A one-dimensional model for the crystallization of a binary or pseudo-binary solution was developed. Usually, the Stefan’s problem is associated with the crystallization of melted solids, in which the energy transfer (heat diffusion) dominates the process. In the present work, the Stefan’s problem was solved for the crystallization from solutions, i.e., a situation in which mass transfer is the most important phenomenon. An analytical solution was obtained for the equation describing the process. From this solution, a mathematical expression for the crystal growth was obtained as a function of time, degree of supersaturation, liquid diffusivity and solution molar concentration. It was also observed that the expression for the crystal growth agrees qualitatively well with experimental data reported in the literature.

【 授权许可】

Unknown