The optimal conditions for the supercritical carbon dioxide (SC-CO2) extraction of flaxseed oil from flaxseed were determined using response surface methodology (RSM). A second-order regression for rotation-orthogonal composite design was used to study the effects of three independent variables: extraction pressure (MPa), extraction temperature (oC) and CO2 flow rate (L/h) on the yield of flaxseed oil. The independent variables were coded at five levels and their actual values selected on the basis of preliminary experiments. The results indicated that the yield of flaxseed oil was beyond 29% at a probability of 95% in the range of extraction pressure: 38.6-42.3 MPa, extraction temperature: 52.3-57.0 oC, and CO2 flow rate: 27.8-31.2 L/h. The optimal extraction conditions were extraction pressure of 41 MPa, extraction temperature of 56 oC and CO2 flow rate of 31 L/h according to the analysis of response surface. In this condition, the experimental yield of flaxseed oil was 29.96%, which was close to the predicted value of 30.52%.
展开▼
机译：使用响应面方法（RSM）确定了从亚麻籽中提取亚麻籽油的超临界二氧化碳（SC-CO2）的最佳条件。旋转正交复合设计的二阶回归用于研究三个独立变量的影响：萃取压力（MPa），萃取温度（oC）和CO2流量（L / h）对亚麻籽油产量的影响。自变量被编码为五个级别，并根据初步实验选择了它们的实际值。结果表明，在萃取压力：38.6-42.3 MPa，萃取温度：52.3-57.0 oC和CO2流量：27.8-31.2 L / h的范围内，亚麻籽油的产率超过29％，概率为95％。 。根据响应面分析，最佳提取条件为提取压力为41 MPa，提取温度为56 oC，CO2流量为31 L / h。在此条件下，亚麻籽油的实验产率为29.96％，接近预期值30.52％。
展开▼
