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Citation: Liu Hong-Qin, Wang Wen-Chuan, Lu Huan-Zhang. Vapor Liquid Equilibrium of Dilute Solutions by the Limiting Values From the Gas Chromatographic Measurements[J]. Acta Physico-Chimica Sinica, ;1991, 7(05): 558-565. doi: 10.3866/PKU.WHXB19910509 shu

Vapor Liquid Equilibrium of Dilute Solutions by the Limiting Values From the Gas Chromatographic Measurements

1.
Department of Chemical Engineering, Beijing Institute of Chemical Technology, Beijing 100029

Received Date: 30 June 1990
Available Online: 15 October 1991

This paper proposes a new equation for the determination of the limiting slope of activity coefficient vs mole fraction (dlnγ_1/dx_1)_((x_1)→0) from gas chromatography measurements, the equation has been ri rously derived and is convenient to be applied. A method to predict the vapor liquid equilibrium of dilute solutions from the infinite dilute activity coefficient γ_1~∞ and (dlnγ_1/dx_1)_((x_1)→0) has also been presented by virtue of the activity coefficient models for dilute solutions proposed recently. The results of predictions for 7 systems are satisfactory in comparison with those from direct measurements by the GC method. Finally, our model for (dlnγ_1/dx_1)_((x_1)→0) is compared with that proposed by Valentin and Guiochon, and the results show that our model is a od improvement.
- Vapor liquid equilibrim; Dilute solution; Gas ehromatographic measurement; Limiting value
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