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Broken and Intact Cell Model for supercritical carbon dioxide extraction of tea Camellia sinensis (L) seed oil
The Journal of Supercritical Fluids ( IF 3.9 ) Pub Date : 2021-09-28 , DOI: 10.1016/j.supflu.2021.105422
Andrea Natolino 1 , Carla Da Porto 1 , Mario Scalet 1
Affiliation  

The model of broken and intact cells was used to fit the experimental data, and it was proved to be able to describe the extraction process of tea seed oil. The extraction rate, observed through the overall extraction curves (OEC), resulted in being faster the higher the pressure whereas the temperature had less influence on the extraction kinetics. The volume mass transfer coefficients in the fluid phase (kfa0) and solid phase (ksas) were used as fitting parameters. The maximum average deviation between measured and calculated oil yield was 4.1%. Mass transfer coefficients in the fluid phase and solid phase varied between 2.40·10−2–2.75·10−2 s−1 and 4.32·10−5–6.90·10−5 s−1, respectively. The outcomes of work showed the highest extraction yield (50.03 ± 0.68% w/w) obtained at 300 bar and 40 °C. Tea seed oil extracted using SC-CO2 presented higher antioxidant capacity and lower UV indices than oil extracted with n-hexane.



中文翻译:

茶茶籽油超临界二氧化碳萃取的破碎和完整细胞模型

采用破碎和完整细胞模型对实验数据进行拟合,证明能够描述茶籽油的提取过程。通过整体萃取曲线 (OEC) 观察到的萃取速率导致压力越高,萃取速率越快,而温度对萃取动力学的影响较小。流体相(k f a 0)和固相(k s a s)中的体积传质系数用作拟合参数。测得和计算出的油产量之间的最大平均偏差为 4.1%。液相和固相中的传质系数在 2.40·10 -2 –2.75·10 -2 s -1 之间变化和 4.32·10 -5 –6.90·10 -5 s -1分别。工作结果表明,在 300 bar 和 40 °C 下获得的提取率最高 (50.03 ± 0.68% w/w)。使用SC-CO茶籽油提取2呈现更高的抗氧化能力和低的紫外线指数比用提取的油Ñ正己烷。

更新日期:2021-10-12
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