A simplified model to describe the kinetic behavior of supercritical fluid extraction from a rice bran oil byproduct.
A simplified model to describe the kinetic behavior of supercritical fluid extraction from a rice bran oil byproduct.
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描述从米糠油副产品中超临界流体萃取的动力学行为的简化模型。
DOI：
10.5923/j.fph.20130304.05
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
M. Meireles
中科院分区：
文献类型：
--
作者：
S. P. Jesus;M. N. Calheiros;H. Hense;M. Meireles
利用米糠油（RBO）工业副产物超临界流体萃取（SFE）的实验数据，建立了总萃取曲线（OEC）的数学模型。皂脚派生从RBO脱氧过程作为原料,因为它包含大量的γory zanol, wh我是一个有价值的自然antio xidant。本文的主要目的是利用从米糠油皂料（RBOS）中获得的SFE动力学数据，用简化模型描述OEC。根据提取液的离子产率和γ-稻谷醇含量，采用全局y场等温线（GYI）选择最佳操作条件（温度和压力）。对四种简化模型进行了拟合，并对表征恒萃取率的动力学参数进行了估计。提取率最高的值(12.5%,w / w)的γ-谷维素含量(16%,w / w)和γory zanol回收率(55%,w / w)被发现在30 M Pa / 333 k。所提出的样条模型与实验数据拟合最佳，并能定量描述OEC。结果表明，萃取时间（tCER）为70 min，溶剂料比（S/F）为23%，萃取率为9.4%。
The mathematical modeling of the overall extraction curve (OEC) was performed using experimental data of supercritical flu id extraction (SFE) fro m a byproduct of the rice bran oil (RBO) industry. The soapstock derived fro m the RBO deacidification process was used as raw material because it contains a significant amount of γ-ory zanol, wh ich is a valuable natural antio xidant. The main goal of this work was to describe the OEC by a simplified model using the kinetic data obtained for the SFE fro m rice bran oil soapstock (RBOS). The global y ield isotherms (GYI) were used to select the best operational conditions (temperature and pressure) based on the extract ion yield and the γ-oryzanol content of the obtained extract. The OEC was fitted to four simplified models and the kinetic parameters which characterize the constant extraction rate (CER) were estimated. The highest values for the extraction yield (12.5 %, w/w), the γ-oryzanol content (16 %, w/w), and the γ-ory zanol recovery rate (55 %, w/ w) were found at 30 M Pa/333K. The proposed spline model presented the best fit to experimental data and quantitatively described the OEC. The estimated time span of the CER period (tCER) was 70 min and the corresponding solvent to feed (S/F) ratio and extraction yield were 23 and 9.4 %, respectively.