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Citation: Liping Song, Yating Wang, Ou Zheng, Shuting Wu, Shuying Zhu, Jianzhong Chen. Temperature Compensation Method to Solve the Fractionation Effect in the Experiment of Binary Vapor-Liquid Equilibrium System Phase Diagram[J]. University Chemistry, ;2020, 35(1): 87-91. doi: 10.3866/PKU.DXHX201905002 shu

Temperature Compensation Method to Solve the Fractionation Effect in the Experiment of Binary Vapor-Liquid Equilibrium System Phase Diagram

College of Chemistry, Fuzhou University, Fuzhou 350116, P. R. China

Received Date: 6 May 2019

In this paper, the device for phase diagram development experiment has been modified, which can be used to measure the boiling point and dew point of vapor-liquid equilibrium system simultaneously. In addition, the vapor-liquid phase diagrams of cyclohexane-ethanol under the conditions of no heat preservation, heat preservation and temperature compensation are drawn and compared. Results show that there is a great difference between the temperatures of boiling point and dew point both for the vapor-liquid equilibrium system with the simple heat preservation or without the heat preservation, and the vapor-phase lines based on the boiling point temperature are seriously distorted. With the temperature compensation for the system, the two vapor-phase lines according to the boiling point and the dew point temperature are in good agreement, which means the problem of vapor-phase fractionation effect has been solved.
- Physical chemistry,
- Vapor-liquid phase diagram drawing,
- Fractionation effect,
- Temperature compensation
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