温度补偿法解决二元气液平衡系统相图绘制实验中的分馏效应

引用本文: 宋丽平, 王亚婷, 郑欧, 吴舒婷, 祝淑颖, 陈建中. 温度补偿法解决二元气液平衡系统相图绘制实验中的分馏效应[J]. 大学化学, 2020, 35(1): 87-91. doi: 10.3866/PKU.DXHX201905002 shu

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

温度补偿法解决二元气液平衡系统相图绘制实验中的分馏效应

福州大学化学学院, 福州 350116
基金项目:
国家自然科学基金项目（21775026）；福州大学一流本科教育改革项目（003698）；福州大学本科生科研训练项目（25071）

摘要: 通过改装二元气液平衡系统相图绘制实验的装置，同时测定了环己烷-乙醇气液系统建立平衡时的沸点和露点温度，绘制并对比未保温、保温和温度补偿条件下的环己烷-乙醇气液相图。研究发现，由于分馏效应的存在，未保温和简易保温情况下，测得的溶液的沸点与露点两者温度均存在较大的差异，利用沸点温度绘制的气相线存在严重失真；对系统进行了温度补偿后根据沸点和露点温度绘制的两条气相线能吻合较好，即气相分馏效应得到了解决。

关键词:

English

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: 06 May 2019

Abstract: 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.

Key words:

1. [1] Shoemaker, D. P.; Garland, C. W.; Nibler, J. W. Experiments in Physical Chemistry, 6th ed.; McGraw-Hill Book Co.:New York, 1996; pp. 207-215.
2. [2] 复旦大学. 物理化学实验. 第3版. 北京:高等教育出版社, 2004:39-45.
3. [3] 南京大学. 物理化学实验. 北京:高等教育出版社, 2010:40-44.
4. [4] 韩国彬, 陈良坦, 李海燕, 袁汝明. 物理化学实验. 厦门:厦门大学出版社, 2014:61-67.
5. [5] 北京大学. 物理化学实验. 第4版. 北京:北京大学出版社, 2002:54-56.
6. [6] 高绍康. 基础化学实验. 北京:化学化工出版社, 2013:485-489.
7. [7] 清华大学. 基础物理化学实验. 北京:高等教育出版社, 2008:36-38.
8. [8] Kugel, R. W. J. Chem. Educ. 1998, 75 (9), 1125.
9. [9] Chen, F. M. C. J. Chem. Educ. 2005, 82 (7), 1100A.
10. [10] Boudreaux, A.; Campbell, C. J. Chem. Educ. 2012, 89(6), 707.
11. [11] 郑欧, 张栢茂, 祝淑颖, 黄长沧, 吴舒婷, 李浩宏. 大学化学, 2018, 33(10), 85.
12. [12] Horsley, L. H. Advances in Chemistry. Series 116. Azeotropic Data-III.; American Chemical Society:Washington D. C.,1973; p. 136.

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温度补偿法解决二元气液平衡系统相图绘制实验中的分馏效应

English

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

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