摘要
在萃取器为 1.2L的试验装置上 ,在温度为 45℃、压力为 32 .0MPa、原料粒度 (D)为 1.2mm的条件下 ,进行了超临界CO2 萃取蛋黄油的研究 .考察了CO2 的流量和原料粒度对萃取的影响 .建立了超临界CO2 萃取蛋黄油的数学模型 ,该模型能较好地反映实际萃取过程 .根据模拟结果得到外扩散传质系数和流体流速的 0 .5
Extraction of egg yolk oil (EYO) from egg yolk powder with supercritical carbon dioxide (SC-CO2) was performed at 45° C and 32.0 MPa in a 1.2 L laboratory apparatus. The effects of particle size and flow rate of CO2 on the extraction were investigated. The controlling steps in extraction were external diffusion of EYO and equilibrium of EYO between SC-CO2 and matrix. A mathematical model was developed for simulating the extraction process. The model can simulate satisfactorily the process of extraction of EYO with SC-CO2. The result shows that volumetric mass transfer coefficient K a is directly proportional to the flow rate of CO2 with an exponent of 0.548.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2001年第2期130-134,共5页
CIESC Journal
关键词
超临界二氧化碳
萃取
蛋黄油
数学模拟
蛋黄粉
Food processing
Kinetic theory
Mass transfer
Mathematical models
Separation
