引用本文:
刘洪勤, 汪文川, 卢焕章. 气相色谱端值法测定稀溶液的气液平衡[J]. 物理化学学报,
1991, 7(05): 558-565.
doi:
10.3866/PKU.WHXB19910509
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
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
气相色谱端值法测定稀溶液的气液平衡
摘要:
本文提出了一种由气相色谱测定的γ_1~(∞)和(dln γ_1/dx_1)x_1→∞推算稀溶液气液平衡的方法。经较严格的推导, 得到(dlnγ_1/dx_1)x_1→∞的新测定公式; 与现有公式比较, 本文式更严格、具一般性,也更易于应用。将所得公式用于确定稀溶液活度系数模型参数, 进而推算气液平衡, 与直接测定值相比较, 得到了满意的结果。
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关键词:
- 气液平衡; 稀溶液; 气相色谱; 端值
English
Vapor Liquid Equilibrium of Dilute Solutions by the Limiting Values From the Gas Chromatographic Measurements
Abstract:
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.
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