Experimental and modelling investigations of supercritical CO extraction of oil from kernels were conducted at 200 and 400 bar, 313 and 333 K at a CO flow rate of 0.1 kg/h. Regardless of the pressure and the temperature, the highest achievable yield was estimated at about 0.7 kg / kg. The extraction kinetics were modeled with Sovová’s broken and intact cells model. Walnut oil apparent solubility in supercritical CO was determined and modelled with the Chrastil equation. A retrograde solubility behaviour was observed at 200 bar, the faster extraction kinetics were found at 400 bar and 333 K. The fatty acid composition of the supercritical CO extracted oil was compared to the quality of the oil extracted by press and n-hexane Soxhlet extraction.

中文翻译：

---

超临界 CO2 萃取核桃 (Juglans regia L.) 油：萃取动力学和溶解度测定


在 200 和 400bar、313 和 333K、CO 流量为 0.1kg/h 的条件下，进行了超临界 CO2 从籽粒中提取油的实验和模型研究。无论压力和温度如何，估计可达到的最高产量约为0.7kg/kg。提取动力学采用 Sovová 的破碎和完整细胞模型进行建模。核桃油在超临界 CO2 中的表观溶解度由 Chrastil 方程确定并建模。在 200bar 下观察到逆行溶解行为，在 400bar 和 333K 下发现更快的萃取动力学。将超临界 CO2 萃取油的脂肪酸组成与压榨和正己烷索氏提取萃取的油的质量进行比较。 。