蒽醌於超臨界二氧化碳流體與共溶劑系統中溶解度之量測及模式預測

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题名:	蒽醌於超臨界二氧化碳流體與共溶劑系統中溶解度之量測及模式預測
其它题名:	Measurements and Correlations of the Solubility of 9,10-Anthraquinone in Supercritical Carbon DioxideMeasurements and Correlations of the Solubility of 9,10-Anthraquinone in Supercritical Carbon Dioxide
作者:	李駿逸 Li, Jiun-Yi
贡献者:	程學恆東海大學化學工程與材料工程學系
关键词:	超臨界流體萃取、共溶劑、二氧化碳、混合律、二氧化碳、蒽醌、模式關聯 Supercritical Carbon DioxideSupercritical Carbon Dioxidesupercritical carbon dioxide;9,10-Anthraquinone;ethanol;entrainer;correlations
日期:	2008
上传时间:	2011-03-09T08:01:12Z (UTC)
摘要:	本研究採用半流動式相平衡實驗裝置進行超臨界二氧化碳萃取實驗，在溫度308.15~328.15 K，與壓力89~300 bar之間的條件下量測單一蒽醌(9,10-Anthraquinone)，及同時含乙醇為共溶劑情況下，在超臨界二氧化碳流體中之平衡溶解度；此外並以Peng-Robinson狀態方程式(P-R EOS)配合凡德瓦爾混合律(van der Waal’s one-fluid, vdW-2)，以及Huron-Vidal混合律，並使用四種半經驗式包含Chrastil，Schmitt-Reid，Giddings和Santiago-Tega等進行數據關聯，其中且包括文獻中蒽醌於超臨界二氧化碳中之相平衡數據，希冀可由數種理論模式得到最佳的溶解度預測結果。實驗結果顯示，蒽醌於超臨界二氧化碳中之平衡溶解度範圍在6.97 10-7~9.88 10-5間，而蒽醌於乙醇(EtOH)為共溶劑之超臨界二氧化碳系統中平衡溶解度則為3.88 10-6~1.25 10-4(xEtOH=0.03)與5.70 10-6~1.86 10-4(xEtOH=0.07)之間。實驗結果並顯示在蒽醌-二氧化碳二成份系統中交錯壓力發生在160~200 bar之間，而在蒽醌-二氧化碳-乙醇三成份系統中，則發生在140~150 bar之間。本研究關聯結果顯示，針對蒽醌-二氧化碳系統關聯結果最佳者為Giddings半經驗式，及P-R EOS配合vdW-2混合律，其平均相對誤差分別為11.43%及12.46%；在蒽醌-二氧化碳-乙醇三成份系統中關聯最佳之模式為P-R EOS配合vdW-2混合律，以及Giddings半經驗式，其相對偏差分別為2.64%以及4.03%。 Solubility of 9, 10-Anthraquinone in supercritical CO2, both pure and modified, were measured at temperatures from 308.15 to 328.15 K and pressures from 89 up to 300 bar using a semi-flow apparatus. The solubility data measured in pure CO2 and in CO2 containing ethanol as modifier were both correlated using the Peng-Robinsin equation of state (P-R EOS) with van der Waal’s (vdW-2) and Huron-Vidal mixing rules, together with the density-based equations proposed by Chrastill, Schmitt and Reid, Giddings, and Santiago and Teja. The existing literature solubility data of 9, 10-Anthraquinone in pure CO2 were also incorporated into the data base to be correlated. The experimental results showed that observed solubilities of 9, 10-Antraquinone of the modified system were higher than those in pure CO2. Specifically, the solubility of 9, 10-Anthraquinone was in the range of 6.97 10-7~9.88 10-5 in terms of more fraction, while that of the modified system was between 3.88 10-6 and 1.25 10-4 (for xEtOH=0.03) and between 5.70 10-6~1.86 10-4(for xEtOH=0.07). For the pure CO2 system, the crossover pressures appeared in the 160-200 bar region over the measured temperature range, On the other hand, the crossover region for the modified system at the same temperatures was in the range of 140-150 bar.In the 9,10-Anthraquinone-CO2 system, the Giddings model and P-R EOS with vdW-2 mixing rules resulted in smallest deviations of 11.43% and 12.46%. Furthermore, the solubility data of 9,10-Anthraquinone in the modified system correlated using the P-R EOS with vdW-2 mixing rule and Giddings model also showed the smallest deviations of 2.63% and 4.03%.
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