Isobaric Vapor–Liquid Equilibrium Data for the Binary System of Water + 2-Methylpyridine at 101.3, 60.0, and 20.0 kPa

Abstract

Isobaric vapor−liquid equilibrium (VLE) data for the binary system of water + 2-methylpyridine were determined by using Fisher VLE 602 equipment at 101.3, 60.0, and 20.0 kPa to assist with the design of the separation process by distillation. All of the binary data at different pressures were considered to be thermodynamically consistent according to Wisniak's area and point test. The results showed that the binary system at all three pressures formed the minimum boiling azeotropes and exhibited a positive deviation from Raoult's law. The binary VLE data were correlated by using NRTL-HOC, UNIQUAC-HOC, and Wilson-HOC models with minor deviations, and the result showed that all three models were in good agreement with the experimental data. The azeotropic temperatures and compositions at 101.3, 60.0, and 20.0 kPa were determined by the NRTL-HOC model, respectively, which showed that the azeotropic composition of 2-methylpyridine tended to decrease with the decline in system pressure.

Isobaric Vapor–Liquid Equilibrium for Binary and Ternary Systems of 2-Methoxyethanol, Ethylbenzene, and Dimethyl Sulfoxide at 100.00 kPa

“…The deviation D < 5 in the Wisniak’s L – W test listed in Table illustrates that the binary systems and the ternary system pass the area test. Additionally, all of the experimental points meet the 0.92 < L k / W k < 1.10 criteria, which indicates that the VLE data pass the point-to-point test . These findings show that all the VLE data gained from the experiment are thermodynamically consistent.…”

Isobaric Vapor–Liquid Equilibrium Measurements and Calculations Using Nontraditional Models for the Association Systems of Ethyl Acetate + 2-Ethylhexanoic Acid and Propyl Acetate + 2-Ethylhexanoic Acid at Atmospheric Pressure

“…The Van Ness test was used to check the consistency of the data. Thermodynamic models (NRTL-HOC, 30 UNIQUAC-HOC, 31 and Wilson-HOC 32 ) were used to correlate the VLE data. In addition, the model parameters (BIPs) were obtained for each model.…”

Isobaric Vapor–Liquid Equilibrium Data for Six Binary Systems: Prop-2-en-1-ol (1)–Hexan-2-ol (2), Prop-2-en-1-ol (1)–Hexan-2-one (2), Hexan-2-one (1)–Hexan-2-ol (2), Prop-2-en-1-ol (1)–4-Methyl-pentan-2-ol (2), Prop-2-en-1-ol (1)–4-Methyl-pentan-2-one (2), and 4-Methyl-pentan-2-one (1)–4-Methyl-pentan-2-ol (2) at 101.32 kPa

“…On the other hand, prop-2-en-1-ol–hexan-2-ol and prop-2-en-1-ol–4-methyl-pentan-2-ol showed a similar point of inflection at x 1 ≈ 0.2 with asymmetric activity coefficient plots, indicating that one of the components had a very low deviation from ideal behavior, supposedly the long-chain secondary alcohol. This asymmetric behavior was also evidenced for pentan-2-one/propanol, water/2-methylpyridine, and water/butane-2,3-diol systems. − …”