Measurement and Correlation of Solubility Data for CO2 in NaHCO3 Aqueous Solution

被引：36

作者：

Han, Xiaoying ^{[1
,2
]}

Yu, Zhihui ^{[1
]}

Qu, Jingkui ^{[1
]}

Qi, Tao ^{[1
]}

Guo, Wei ^{[3
]}

Zhang, Guoqing ^{[4
]}

机构：

[1] Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

[3] Beijing Univ Chem Technol, Coll Chem Engn, Beijing 100029, Peoples R China

[4] Sichuan Anxian YinHe Construct & Chem Grp Co Ltd, Chengtu 0816, Sichuan, Peoples R China

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2011年 / 56卷 / 04期

关键词：

CARBON-DIOXIDE; MOLECULAR THERMODYNAMICS; OSMOTIC COEFFICIENTS; SODIUM-CHLORIDE; HENRY CONSTANTS; IMPROVED MODEL; PURE WATER; PREDICTION; ELECTROLYTES; TEMPERATURES;

D O I：

10.1021/je1011168

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

To investigate the influence of NaHCO3 on the CO2, absorption in aqueous solution, the solubility of CO2 in NaHCO3 aqueous solutions [(0, 0.05, 0.1, 0.5, and 1.0) mol.kg(-1)] was measured in the temperature range from (313 to 333) K with pressure range from (0.3 to 2.0) MPa by employing a new designed batch apparatus. The results showed that the solubility data for CO2 in NaHCO3 aqueous solutions agreed well with Henry's law, and the Henry constant appeared to be a function of temperature and the concentration of NaHCO3. Two thermodynamic models were proposed for correlating the experimental data, that is, the modified Setschenow and Peng-Robinson (PR)-Duan equations. It was proved that the models fitted well in with the experimental data, and the average relative deviations were (4.06 and 3.90) %, respectively. In addition, the Henry constant in pure water can be basically predicted at a certain temperature range. The influence of NaHCO3 on the solubility of CO2 is interpreted by "salting-out effect" which is usual for the salt-containing solutions.

引用

页码：1213 / 1219

页数：7

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