超临界CO_2流体萃取大豆油的研究与数值模拟

本文建立了一套超临界流体萃取的实验装置 ,在压力为 2 0MPa～ 30MPa ,温度为30 8K～ 32 3K的条件下 ,研究了用超临界二氧化碳萃取大豆油。试验证明用超临界流萃取的方法可以较为完全地得到大豆中的油分。基于固定床、积分柱塞流与微分混合流的假设建立了理论计算模型 ,使用这个模型可以根据装料量少耗时短的微分萃取试验结果来较为准确地计算出相同条件下积分萃取的过程。经本试验结果比较证明该方法简便可行 ,在本文条件下误差小于 6 % ,是对超临界流体萃取放大研究的一种探索

Research and Modeling of Supercritical Extraction of Soybean Oil

The extraction of oil from soybean with supercritical CO 2 was studied in a continuous-flow extraction apparatus at a pressure of 20-30MPa and a temperature of 308-323K.The results showed that the oil in soybean could be extracted out completely in this way. A mathematical model based on the hypothesis of fixed bed,plug-flow in integral run and mixed-flow in differential run is set up.Using this model we can calculate the results of integral extraction on the base of differential extraction which uses small materiel and occupies less time.The solving method of this model is simple.Under the condition in this paper,the deviation is less than 6%.