THE USE OF A GAS-CHROMATOGRAPH TO OBTAIN DRYING RATES DATA THROUGH SIMPLE LABORATORY EXPERIMENTS

Citation
Fm. Laurence et al., THE USE OF A GAS-CHROMATOGRAPH TO OBTAIN DRYING RATES DATA THROUGH SIMPLE LABORATORY EXPERIMENTS, Drying technology, 15(9), 1997, pp. 2325-2341
Citations number
6
Categorie Soggetti
Material Science
Journal title
ISSN journal
07373937
Volume
15
Issue
9
Year of publication
1997
Pages
2325 - 2341
Database
ISI
SICI code
0737-3937(1997)15:9<2325:TUOAGT>2.0.ZU;2-8
Abstract
A method making use of a gas chromatograph was investigated to acquire bound solvent drying rates. The solid to be dried was used as station ary phase in a chromatographic column, and the TCD detector was used t o follow the decrease of solvent content of the effluent as inert gas was flown through the column. The measurement of the break-through cur ve allows the evolution of drying rate with time or solvent content to be obtained. The comparison of the experimental results with numerica l simulation leads to the determination, through parametric adjustment , of the internal mass-transfer coefficient as a function of the solve nt content during the second stage of bound solvent drying period. Thi s parameter can lead to the value of the diffusivity as a function of solvent content.