An experimental investigation on drying kinetics of calcium carbonate

Journal of Particle Science and Technology

Amir Charkhi¹  Sadegh Beigi²  Mohammad Amin Sobati² 

[1] Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, P.O. Box 11365-8486, Tehran, Iran;School of Chemical Engineering, Iran University of Science and Technology (IUST), Tehran, Iran;

关键词: Calcium carbonate;    Effective moisture diffusivity;    Thin-layer drying;    Drying rate;    Empirical correlation;   

DOI  :  10.22104/jpst.2015.219

来源: DOAJ

【 摘 要 】

Calcium carbonate is a versatile mineral with diverse industrial applications. Drying is a necessary processing step in preparation of calcium carbonate product. Deep knowledge of drying kinetics is required in order to design an appropriate dryer. The main aim of the present study was to investigate the drying kinetics of calcium carbonate, experimentally. Thirteen empirical correlations with temperature-dependent constants were used to describe the thin-layer drying behavior of calcium carbonate. The correlation fitting results revealed that all examined empirical correlations were acceptable. But, the Page correlation was in the best agreement with experimental data. The effective moisture diffusivity was calculated within 8.61 × 10-9 to 10.40 × 10-9m2s-1 in the temperature range of 60 to 90˚C. The drying activation energy was also calculated to be 6.306 kJmol-1. The fitted correlations for the drying kinetics of calcium carbonate can be used to design an industrial dryer and also to estimate drying time in various drying conditions.

【 授权许可】

Unknown