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標題: 一甲基甲醯胺與二甲苯,環丁碸與二甲苯,甲苯與二甲苯,及苯與壬烷雙成分系統之恆溫汽液相平衡
Isothermal vapor-liquid quilibria of binary mixtures of N-methylformamide + xylene, sulfolane + xylene, toluene + xylene, benzene + nonane.
作者: 陳維冠
Chen, Wei-Kuan
關鍵字: Vapor-liquid equilibrium;苯;benzene;toluene;o-xylene;m-xylene;p-xylene;sulfonane;NMF;excess molar volume;甲苯;鄰間對二甲苯;環丁碸N-甲基甲醯胺;過剩吉布士自由能;過剩莫爾體積
出版社: 化學工程學系所
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本研究量測333.15 K、343.15 K、及353.15 K的雙成分混合物的汽液相平衡。七組系統為苯(1)+壬烷(2)、甲苯(1)+鄰二甲苯(2)、間二甲苯(1)+環丁碸(2)、鄰二甲苯(1)+環丁碸(2)、鄰二甲苯(1)+N-甲基甲醯胺(2)、間二甲苯(1)+N-甲基甲醯胺(2)、及對二甲苯(1)+N-甲基甲醯胺(2)。量測壓力範圍從0.01到101.3 kPa之間。分別以Wilson、NRTL、UNIQUAC三種活性係數模式,進行壓力與液相莫爾分率的實驗值間彼此,相關性之研究。以泡點壓力方法來計算汽相莫爾分率,並以Peng-Robinson狀態方程式關聯汽相數據。同時,量測汽相與液相的密度,得汽液相的過剩莫爾體積值。實驗結果發現甲苯(1)+鄰二甲苯(2)、鄰二甲苯(1)+N-甲基甲醯胺(2)、間二甲苯(1)+N-甲基甲醯胺(2)、及對二甲苯(1)+N-甲基甲醯胺(2)的四組混合物,呈現近似理想溶液。苯(1)+壬烷(2)、間二甲苯(1)+環丁碸(2)以及鄰二甲苯(1)+環丁碸(2)三組混合物,呈現偏離理想溶液。過剩吉布士自由能的計算值顯示,僅有甲苯(1)+鄰二甲苯(2)雙成分系統呈現負值,其餘六組雙成分系統的自由能皆為正值。

Vapor-liquid equilibria at 333.15 K 343.15K and 353.15 K for seven binary mixtures of benzene + nonane, toluene + o-xylene, m-xylene + sulfolane, o-xylene + sulfolane, o-xylene + NMF, m-xylene + NMF and p-xylene + NMF have been obtained at pressures ranged from 0.01 to 101.3 kPa. The Wilson, NRTL and UNIQUAC activity coefficient models have been employed to correlate experimental data to find intermolecular parameters. The non-ideal behavior of the vapor phase has been considered by using the Peng-Robinson equation of state in calculating the vapor mole fraction. Liquid and vapor densities were measured by using two vibrating tube densitometers to determine liquid excess molar volumes. Six systems of benzene + nonane , m-xylene + sulfolane , o-xylene + sulfolane , o-xylene + NMF, m-xylene + NMF and p-xylene + NMF mixtures present large positive deviations from the ideal solution and belong to endothermic mixings because their excess Gibbs energies are positive. Temperature dependent intermolecular parameters in the three models were obtained in this study.
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