Abstract
The drying characteristics (critical moisture content, equilibrium moisture content, constant drying rate and effective diffusivity) of various particles (gypsum, millet, polyvinyl chloride and silica gel) using a thermogravimetric analyzer were measured. The experiments were performed in the gas temperature range of 40 to 100°C under isothermal conditions. The drying rate curve was mainly dependent on the moisture content, particle size, gas temperature and the internal structure of the solid particles. The equilibrium moisture content of solid particles decreased with increasing gas temperature, while the critical moisture content and the effective dispersion coefficient increased with increasing gas temperature. The effective diffusion coefficients of both PVC and gypsum particles were not able to be determined by Fick's law since the experimental data were not well matched with the model predicted values, which consisted of the drying time in the falling-rate drying period.
| Original language | English |
|---|---|
| Pages (from-to) | 1170-1175 |
| Number of pages | 6 |
| Journal | Korean Journal of Chemical Engineering |
| Volume | 20 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2003 Nov |
| Externally published | Yes |
Bibliographical note
Funding Information:The authors (Choi, G. B. and Park, Y. S.) acknowledge a grant-in-aid (2000-E-ID01-P-04) for research from Ministry of Commerce Industry and Energy. The authors from the SungKyunKwan University wish to thank the Ministry of Education for partially financial support (BK-21 Project).
Keywords
- Drying Characteristics
- Gypsum
- Millet
- PVC
- Silica Gel
- TGA
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering