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作 者:文震[1] 刘波[1] 郑宗坤[1] 吕维忠[1] 游新奎[1] 李琼[2]
机构地区:[1]深圳大学化学与化工学院,广东深圳518060 [2]华南理工大学化学与化工学院,广东广州510640
出 处:《精细化工》2008年第9期876-879,共4页Fine Chemicals
基 金:国家自然科学基金(20606013);深圳大学科研启动基金(200816);广东省绿色化学产品技术重点实验室开放基金(GC200701)~~
摘 要:利用动态法测定了磷脂酰胆碱(PC)在超临界CO2(SC-CO2)及超临界CO2/乙醇体系中的溶解度。在15~30MPa压力(p)、313~343K温度(T)条件下,PC在SC-CO2中的溶解度为x1(PC)=10^-6~10^-5,在SC-CO2/乙醇多元体系中,PC溶解度x2(PC)可提高至10^-4。PC的溶解度与c(CO2)(d)、x(CH3CH2OH)(c)呈指数相关性。根据缔合反应规则,建立了质量作用模型x1(PC)=d^3.89e^(-2383.63/T-41.64)、x2(PC)=d^3.17c^0.36e^(-1748.03/T-33.73),分别关联PC在SC-CO2、SC-CO2/乙醇中的溶解度,模型计算结果与溶解度实验数据较好吻合,关联误差(AARD)分别为4.31%、3.78%。The solubility of phosphatidylcholine (PC) in supercritical carbon dioxide ( SC-CO2 ) with and without ethanol were determined by a dynamic method. The solubility in SC-CO2 [ x1 ( PC ) ] were from 10^-6 to 10^-5 ,while x2 (PC) were enhanced up to 10^-4 in SC-CO2 with cosolvent of ethanol at pressure(P) of 15 - 30 MPa and temperature (T) of 313 - 343 K. The solubility data were related exponentially with both c( CO2 ) (d) and x( CH3CH2OH) (c). Derived from the theory of association reaction,the mass action law-based model were established as x1 (PC) = d^3.89e^(-2383.63/T-41.64) and x2 (PC) = d^3.17c^0.36e^(-1748.03/T-33.73) to correlate the experimental solubility in SC-CO2 with and without ethanol. The result shows there is a good agreement between experimental data and calculated data of solubility with absolute average relative deviation(AARD) of 4. 31% and 3.78% respectively.
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