Low-temperature Vacuum Drying of Natural Gardenia Yellow Pigment
Gardenia yellow pigment solutions were dried in a vacuum dryer. Effects of operational parameters such as temperature, solution layer thicknesses and the level of vacuum on the drying kinetics were investigated. It was found that the heating temperature had the most significant effect on drying kinetics. Three non-linear regressions, i.e., 3rd degree polynomial model, Henderson and Pabis model and two-term model were presented to fit the experimental data. Simulation results showed the 3rd degree polynomial model gave the best prediction. According to Fick’s law, the effective diffusion coefficients for Gardenia yellow pigment solutions (20％ w.b.) were computed. They were in the range: 8.449×10-9 m2/s at 35℃ to 1.093×10-8 m2/s at 55℃.
Low-temperature vacuum drying Moisture content Effective diffusion coefficient
Wei LIU Li-xin HUANG Cai-hong ZHANG A.S. Mujumdar
Institute of Chemical Industry of Forest Products, Nanjing 210042 P.R. China Department of Mechanical Engineering, National University of Singapore,Singapore119260
国际会议
南京
英文
813-822
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）