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首页> 外文期刊>The Journal of Supercritical Fluids >A step-by-step finite element method for solving the external mass transfer control model of the supercritical fluid extraction process: A case study of extraction from fennel
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A step-by-step finite element method for solving the external mass transfer control model of the supercritical fluid extraction process: A case study of extraction from fennel

机译：用于求解超临界流体提取过程外部传质控制模型的逐步有限元方法：茴香提取的案例研究

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摘要

The effect of grinding time (GT) from 15 s to 20 min on the dynamic yield of supercritical fluid extraction (SFE(from fennel was investigated. The extractor was subjected to a pressure of 200 bar, a temperature of 313 K, and a supercritical CO2 flow rate of 2.0 x 10(-4) kg/s over 80 min. It was found that the overall SFE yield was increased from 6.4 g/100 g fennel when GT = 15 s to 9.8 g/100 g fennel when GT =6 min, while it changed by only 1.5 g/100 g fennel after increasing GT from 6 min to 20 min. The process was then modeled based on the mass conservation law, and the model was solved using Galerkin's method on finite element method (FEM). It was demonstrated that considering the whole bed as one single element can acceptably solve the PDEs and reduces the computation cost significantly. (C) 2020 Elsevier B.V. All rights reserved.
机译：对超临界流体萃取的动态产量（研究了来自茴香的动态产量的研磨时间（GT）的影响（SFE（来自茴香）。提取器经受200巴的压力，温度为313k，以及超临界的温度 在80分钟内，CO 2流速为2.0×10（4）kg / s。结果，当gt = 15s至9.8g / 100g茴香时，总SFE产量从6.4g / 100g茴香增加到gt = 6分钟，虽然在6分钟至20分钟后，其在GT增加到5克/ 100g茴香后仅改变1.5克/ 100g茴香。然后基于大规模保护法建模该过程，使用Galerkin的有限元方法（FEM）解决了该模型的方法 ）。证明整体床作为一个元素可以可接受地解决PDE并显着降低计算成本。（c）2020 Elsevier BV保留所有权利。

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