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首页> 外文会议>International Symposium on Supercritical Fluids Tome 1: Natural Products, Process amp; Equipment Development; 20030428-20030430; Versailles; FR >CORRELATING SOLUBILITY VALUES OF BLACK PEPPER OIL IN SUPERCRITICAL CO_2 USING EMPIRICAL MODELS
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CORRELATING SOLUBILITY VALUES OF BLACK PEPPER OIL IN SUPERCRITICAL CO_2 USING EMPIRICAL MODELS

机译：利用经验模型关联超临界CO_2中黑胡椒油的溶解度值

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摘要

Solubility data are important process parameters, valuable for design and scale up purposes. The equilibrium concentration, or solubility value, indicates the maximum solute concentration in the solvent phase and, for high pressure processes, is related to the solvent density. In supercritical fluid processes, the solubility data can be obtained experimentally by dynamic or static methods, which require considerable experimental effort in order to obtain adequate equilibrium information. A valuable contribution for equilibrium data can be achieved with empirical correlations, in order to provide a better understanding of the dissolution phenomena. Therefore, the objective of this work was to investigate the efficiency of empirical correlations, such as density based correlations like the models proposed by Chrastil and by Del Valle and Aguilera, to correlate experimental solubility data. The empirical modeling was evaluated considering experimental solubility data presented for the complex system black pepper oil (Pipper nigrum) and supercritical CO_2 that varied from 8.58x10~(-2) to 10.44 x10~(-2) g oil/g CO_2.and were obtained for solvent density varying from 701.00 a 948.59 kg CO_2/m~3. The comparison between experimental and correlated data indicate that the better adjustments were obtained by the enhancement factor model.
机译：溶解度数据是重要的过程参数，对于设计和按比例放大目的很有价值。平衡浓度或溶解度值表示溶剂相中的最大溶质浓度，并且对于高压工艺而言，与溶剂密度有关。在超临界流体过程中，可以通过动态或静态方法通过实验获得溶解度数据，这需要大量的实验工作才能获得足够的平衡信息。可以通过经验相关性为平衡数据做出有价值的贡献，以便更好地理解溶出现象。因此，这项工作的目的是研究经验相关性的效率，例如基于密度的相关性，例如Chrastil以及Del Valle和Aguilera提出的模型，以关联实验溶解度数据。考虑到复杂系统黑胡椒油（Pipper nigrum）和超临界CO_2的实验溶解度数据，对实验模型进行了评估，其溶解度范围从8.58x10〜（-2）到10.44 x10〜（-2）g油/ g CO_2。获得的溶剂密度从701.00到948.59 kg CO_2 / m〜3不等。实验数据和相关数据的比较表明，增强因子模型获得了更好的调整。

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