Analysis of solubility on N2 in liquid CO2

被引：1
|
作者：
Yang W. [1 ]
Li S. [1 ]
Feng Y. [2 ]
Shan G. [1 ]
Zhang X. [1 ]
机构：
[1] School of Energy and Environment, Southeast University, Nanjing
[2] Qingdao Hisense Hitachi Air-conditioning System Co. Ltd., Qingdao
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2016年 / 46卷 / 04期
关键词：
Binary interaction parameters; Cryogenic carbon capture; Parameter optimization; Solubility;
D O I：
10.3969/j.issn.1001-0505.2016.04.017
中图分类号：
学科分类号：
摘要：
The solubility of N2 in liquid CO2 is calculated by using the Henry constant, PR(Peng-Robinson) and SRK (Soave-Redlich-Kwong) equation methods. The comparison results between calculation results with experimental data show that PR equation has the highest precision, and the average absolute values of relative deviation of calculation results and experimental data are less than 9%. The deviation of calculation results by using the Henry constant method is the largest, the average absolute values of the relative deviation of calculation results and the experimental data are more than 26%. With the decrease of the temperature and the increase of pressure, the solubility of N2 in liquid CO2 increases. In order to further improve the accuracy of the PR equation, the binary interaction parameters between N2 and CO2 are optimized using experimental data. In addition, a correlation between the binary interaction parameters with the temperature and pressure is proposed. Applying the correlation to the solubility calculations of N2 at 220, 240 and 250 K, the absolute values of the relative deviation of calculation results and the experimental data are less than 2%, and those are less than 0.7% at 220 K, proving the accuracy of the correlation. © 2016, Editorial Department of Journal of Southeast University. All right reserved.
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页码：776 / 781
页数：5
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