Low-Temperature Vacuum Drying of Natural Gardenia Yellow Pigment
The effects of operational parameters, that is, drying temperature, feed solution layer thickness, and level of vacuum, on product qualities and drying kinetics for low-temperature vacuum drying of Gardenia yellow pigment were studied. Temperature had the most significant effect on product quality a...
Saved in:
Published in | Drying technology Vol. 29; no. 10; pp. 1132 - 1139 |
---|---|
Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Philadelphia
Taylor & Francis Group
01.08.2011
Taylor & Francis Ltd |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The effects of operational parameters, that is, drying temperature, feed solution layer thickness, and level of vacuum, on product qualities and drying kinetics for low-temperature vacuum drying of Gardenia yellow pigment were studied. Temperature had the most significant effect on product quality and drying time. The optimal operating conditions to yield the best product quality were obtained as heating temperature, 35°C; layer thickness, 7 mm; and vacuum level, 0.09 MPa. Simulation results showed that the well-known Page model gave the best prediction. The effective diffusion coefficients for Gardenia yellow pigment solutions (20% wb) were estimated from the drying curves in the range 8.45 × 10
−9
m
2
/s at 35°C and 1.10 × 10
−8
m
2
/s at 55°C. |
---|---|
Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0737-3937 1532-2300 |
DOI: | 10.1080/07373937.2011.569625 |