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標題: 正己烷(1)+正庚烷(2)、苯(1)+甲苯(2)、苯(1)+N-甲基甲醯胺(2)、環己烷(1)+辛烷(2)、環己烷(1)+壬烷(2)、正庚烷(1)+辛烷(2)、甲苯(1)+間二甲苯(2)以及甲苯(1)+N-甲基甲醯胺(2)雙成分汽液相平衡
Vapor-Liquid Equilibria of Eight Binary Mixtures of Hexane + Heptane, Benzene + Toluene, Benzene + N-Methylformamide, Cyclohexane + Octane, Cyclohexane + Nonane, Heptane + Octane, Toluene + m-Xylene and Toluene + N-Methylformamide
作者: 李堃榮
Lee, Kun-Jung
關鍵字: Vapor-liquid equilibrium;汽液相平衡;density;excess Gibbs energy;hexane;heptane;benzene;toluene;N-methylformamide;cyclohexane;octane;nonane;m-xylene;密度;過剩吉布士自由能;正己烷;正庚烷;苯;甲苯;N-甲基甲醯胺;環己烷;辛烷;壬烷;間二甲苯
出版社: 化學工程學系所
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本研究完成333 K及353 K八組雙成分系統恆溫相平衡實驗,即正己烷(1)+正庚烷(2)、苯(1)+甲苯(2)、苯(1)+N-甲基甲醯胺(2)、環己烷(1)+辛烷(2)、環己烷(1)+壬烷(2)、正庚烷(1)+辛烷(2)、甲苯(1)+間二甲苯(2)及甲苯(1)+N-甲基甲醯胺(2)之汽液相平衡實驗量測,壓力範圍在0.5到101.3 kPa之間。以NRTL、UNIQUAC及Wilson三種活性係數模式來關聯泡點壓力及液相莫爾分率的實驗值,獲得模式的兩個交互作用參數,再由 Soave-Redlich-Kwong 狀態方程式,得到汽相莫爾分率值。汽相與液相密度的實驗值,是藉由兩個震盪管密度儀分別獲得。吾人的實驗結果,指出五組雙成分正己烷(1)+正庚烷(2)、苯(1)+甲苯(2)、環己烷(1)+辛烷(2)、正庚烷(1)+辛烷(2)及甲苯(1)+間二甲苯(2)的混和溶液趨近理想溶液。而三種雙成分苯(1)+N-甲基甲醯胺(2)、環己烷(1)+壬烷(2)及甲苯(1)+N-甲基甲醯胺(2)的混合溶液,則巨幅地偏離理想溶液。兩組雙成分苯(1)+甲苯(2)及環己烷(1)+辛烷(2)的混合溶液吉布士自由能呈現負值,代表此二系統是溶合(salvation)的放熱混和,其餘雙成分系統均成吸熱混合。

Isothermal vapor-liquid equilibria (VLE) at 333.15 K and 353.15 K for eight binary mixtures of hexane + heptane, benzene + toluene, benzene + N-methylformamide, cyclohexane + octane, cyclohexane + nonane, heptane + octane, toluene + m-xylene and toluene + N-methylformamide have been obtained at pressures ranged from 0.5 to 101.3 kPa. The NRTL, UNIQUAC and the Wilson activity coefficient models have been employed to correlate experimental pressures and liquid mole fractions. The non-ideal behavior of the vapor phase has been considered by using the Soave-Redlich-Kwong equation of state in calculating the vapor mole fraction. Liquid and vapor densities were measured by using two vibrating tube densitometers. Phase behaviors of the P-T-x-y diagrams indicate that five mixtures of hexane + heptane, benzene + toluene, cyclohexane + octane, heptane + octane and toluene + m-xylene were close to the ideal solution. However, cyclohexane + nonane and two mixtures containing N-methylformamide present a large positive deviation from the ideal solution. The benzene + toluene and cyclohexane + octane mixture are negative in the excess Gibbs energy, indicating that they are exothermic systems, but the other six binary mixtures belong to endothermic systems.
其他識別: U0005-0902200910454700
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