本研究主要目的在於量測汽液相平衡數據，本實驗分別量測壬烷(1)+環己烷(2)、壬烷(1)+苯(2)、壬烷(1)+甲苯(2)、壬烷(1)+對-二甲苯(2)、壬烷(1)+間-二甲苯(2)、壬烷(1)+庚烷(2)、庚烷(1)+鄰-二甲苯(2)、庚烷(1)+間-二甲苯(2)、辛烷(1)+鄰-二甲苯(2)、辛烷(1)+間-二甲苯(2)、甲苯(1)+鄰-二甲苯(2)、苯(1)+鄰-二甲苯(2)十二組雙成分在等壓力101.3 kPa下汽液相平衡數據。所有數據皆通過熱力學一致性測試而且沒有共沸物組成。實驗結果由UNIFAC與COSMO-RS預測模式來確定其有效性。這些新的汽液相平衡數據利用Wilson、NRTL與UNIQUAC活性係數模式來關聯。在之前的文獻中，我們發現一個典型的生化緩衝物TRIS可能適用在平移正丙醇與異丙醇的共沸水溶液。為了確認TRIS緩衝物在醇類(正丙醇及異丙醇)與水混合物中的影響，我們計算了正丙醇+水+TRIS及異丙醇+水+TRIS在TRIS不同濃度(0.02、0.04、0.08與0.12)下的等壓汽液相平衡數據。利用NRTL活性係數模式去關聯TRIS+水、TRIS+正丙醇及TRIS+異丙醇可得到新的雙成分交互作用參數。

The isobaric vapor-liquid equilibrium (VLE) data were determined, by using a recirculation type apparatus, for the binary mixtures of nonane (1) + cyclohexane (2), nonane (1) + benzene (2), nonane (1) + toluene (2), nonane (1) + p-xylene (2), nonane (1) + m-xylene (2), nonane (1) + heptane (2), hexane (1) + o-xylene (2), hexane (1) + o-xylene (2), octane (1) + o-xylene (2), octane (1) + m-xylene (2), toluene (1) + o-xylene (2), and benzene (1) + o-xylene (2) at 101.3 kPa. All the data passed the thermodynamic consistency test and no azeotrope was formed in the investigated binary systems. The experimental results were used as a basis to check the validity of two predictive models, the UNIFAC and the conductor-like screening model for realistic solvents (COSMO-RS) models. These new VLE data were also correlated with the Wilson, the NRTL, and the UNIQUAC activity coefficient models. In the present study, we found that a common biological buffer Tris(hydroxymethyl)aminomethane (TRIS) is potentially applicable to shift the azeotrope of aqueous solutions of 1-propanol and 2-propanol. In order to confirmed the effect of TRIS buffer on vapor liquid equilibrium of alcohol (1-propanol and 2-propanol) and water mixture, we measure the the isobaric VLE data at 101.3 kPa for the 1-proponol + water + TRIS and 2-propanol + water + TRIS systems over for the azeotropic range for varying concentration of TRIS (0.02, 0.04, 0.08, and 0.12). The new binary interaction parameters were obtained for TRIS with water, TRIS with 1-propanol, and TRIS with 2-propanol by correlating the new VLE data with NRTL activity coefficient model.

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