低浓度甲醛水溶液的气液平衡体系研究*

南京大学学报(自然科学版) ›› 2010, Vol. 46 ›› Issue (5): 582–587.

低浓度甲醛水溶液的气液平衡体系研究*

金凯洪, 郭亚红, 张晶, 李雪茹, 李磊 ** , 张志炳

出版日期:2015-04-02 发布日期:2015-04-02
作者简介: ( 南京大学化学化工学院, 南京, 210093)
基金资助:
江苏省自然科学基金( BK2008275)

Research on the vapor-liquid equilibrium system of formaldehyde aqueous solution with low concentration

Jin K ai H ong, Guo Ya Hong, Zhang J ing, Li Xue Ru, Li Lei , Zhang Zhi Bing

Online:2015-04-02 Published:2015-04-02
About author: ( School of Chemistry and Chmeical Enigeering, Nanjing University, Nanjing, 210093, China)

摘要/Abstract

摘要： 利用气液平衡测定装置, 在加压条件下, 首次测定了低浓度( 质量浓度为 1%以下) 甲醛水溶液的气液平衡参数. 根据实验数据计算出的低浓度甲醛水溶液的相对挥发度的平均值与相同条件下较
高浓度的甲醛水溶液的相对挥发度的理论值很接近. 通过饱和蒸汽压法及 Wilson 模型对低浓度下甲醛- 水二元体系的气液平衡参数进行了理论计算, 并将计算值与实验值进行了比较, 验证了实验数据的
真实可靠性. 获得的低浓度下甲醛水溶液的气液平衡参数可为回收甲醛采用的加压精馏塔的工业设计提供理论依据和参考.

Abstract: By the vapor -liquid equilibrium measuring device, the vapor-liquid equilibrium parameters of formaldehyde aqueous solution with low weight concentration of below 1% was measured under high pressures for
the first time. The average value of relative volatility for the formaldehyde solution with low concentration, which was calculated by the experimental data, is very close to the reported one for formaldehyde aqueous solution with
higher concentrations. The vapor-liquid equilibrium parameter of formaldehyde solution with low concentration was theoretically calculated by the saturated vapor pressure method and Wilson model, and compared with the
experimental data. The little relative deviation between them has verified the authenticity and reliability of the experimental data. T he vapor-liquid equilibrium parameters obtained in this paper can offer theoretical basis and
reference for the design of the high pressure distillation, and the recovery of formaldehyde from the waste water can be achieved successfully by high pressure distillation. Therefore, the vapor?liquid equilibrium parameters obtained in
this paper has a certain Industrial significance.

金凯洪, 郭亚红, 张晶, 李雪茹, 李磊 ** , 张志炳. 低浓度甲醛水溶液的气液平衡体系研究*

[J]. 南京大学学报(自然科学版), 2010, 46(5): 582–587.

Jin K ai H ong, Guo Ya Hong, Zhang J ing, Li Xue Ru, Li Lei , Zhang Zhi Bing . Research on the vapor-liquid equilibrium system of formaldehyde aqueous solution with low concentration

[J]. Journal of Nanjing University(Natural Sciences), 2010, 46(5): 582–587.

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