本研究採用靜態式總壓汽液量測裝置，完成8組混合物系統於恆溫下之汽液相平衡數據量測，這些混合物分別為1,2,4-trimethyl benzene + o-xylene, p-xylene, m-xylene,cyclohexane,methylcyclohexane, methylcyclopentane, sulfolane, 或3-methylsulfolane，量測之溫度包括363.15 K、393.15 K、433.15 K與473.15 K, 每一配對之莫耳比分別設定在2:8/4:6/6:4/8:2四種組成，每組混合物系統至少取得16點恆溫下之汽液平衡數據 (溫度、壓力、液相組成)。這些系統均無共沸物產生。本研究中採用NRTL-HOC模式關聯上列之汽液平衡數據，並求得8組雙成分系統的最適化參數值，計算結果顯示NRTL-HOC模式可準確描述這些混合物的汽液相平衡行為。

In the present work, the total pressure method was used to measure the isothermal vapor-liquid equilibrium (VLE) data for the binary systems of 1,2,4-trimethyl benzene containing o-xylene, p-xylene, m-xylene, cyclohexane, methylcyclohexane, methylcyclopentane, sulfolane, or 3-methylsulfolane at 363.15 K, 393.15 K, 433.15 K and 473.15 K. Mole ratios of each system are prepared with 8:2/6:4/4:6/2:8, and each system includes at least 16 data points (T, P, xi). The experimental results exhibit no azeotropic behavior. The NRTL-HOC model was applied to correlate all the VLE data and determined the optimal values of model parameters for 8 binary systems. The calculated results reveal that the NRTL-HOC model can accurately represent the VLE behavior for these investigated systems.

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