共溶劑對β-胡蘿蔔素於超臨界二氧化碳溶解度影響之研究; Solubility of β-carotene in supercritical CO2 with cosolvent

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Title:	共溶劑對β-胡蘿蔔素於超臨界二氧化碳溶解度影響之研究;Solubility of β-carotene in supercritical CO2 with cosolvent
Authors:	簡智翔;Chih-Hsiang Jien
Contributors:	化學工程與材料工程研究所
Keywords:	共溶劑;二氧化碳;超臨界流體;胡蘿蔔素;β-carotene;cosolvent;CO2;supercritical
Date:	2004-07-05
Issue Date:	2009-09-21 12:23:44 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	超臨界流體分離技術乃利用溶質在超臨界流體中較大的溶解度的變化來進行，而影響固體溶解度的因素除了溫度、壓力外，共溶劑的添加亦有可能，因此，欲發展此一分離製程，則固體在超臨界流體中的溶解度實驗數據及一個可以準確預測相行為及計算溶質溶解度的熱力學模式是主要的關鍵所在。本研究以一套半流動式的高壓相平衡實驗裝置在溫度313.15 K ~ 333.15 K以及壓力 15 MPa ~ 28 MPa(150 bar ~ 280 bar)的條件下量測單一β-胡蘿蔔素以及在丙酮、乙醇、正己烷等共溶劑參與下β-胡蘿蔔素在超臨界二氧化碳中的平衡溶解度數據。對於熱力學模式的關聯，選用 Peng-Robinsion 狀態方程式 (PR EOS) 並配合VDW2 混合律，此外，本研究將嘗試幾種以流體密度或無限稀釋溶液理論為基礎的半經驗及其修正模式如Chrastil、Mendez-Santiago和Jiang等，來探討共溶劑濃度對β-胡蘿蔔素溶解度的影響，希望能提供進一步分離程序設計時所需之最適熱力學計算模式。 The solubility of a solid in a supercritical fluid is effected by temperature, pressure. And in some cases, an added cosolvent is utilized in the supercritical fluid extraction process. Therefore, the equilibrium data in supercritical fluids and the appropriate thermodynamic models that can accurately predict the phase behavior of the system are the important information for the design of such process and the selection of optimal operating conditions In this study, the solubilities of
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] Electronic Thesis & Dissertation

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