Experimental Determination and Modeling of the Solubility of Sodium Chloride in Subcritical Water from (568 to 598) K and (10 to 25) MPa

被引:19
作者
Ding, Xin [1 ]
Lei, Yali [2 ,3 ]
Shen, Zhenxing [2 ,3 ]
Yu, Yunsong [1 ]
Zhou, Qiang [1 ]
Wei, Jinjia [1 ]
Fang, Tao [1 ]
机构
[1] Xi An Jiao Tong Univ, Sch Chem Engn & Technol, Xian 710049, Shaanxi, Peoples R China
[2] Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Shaanxi, Peoples R China
[3] Chinese Acad Sci, Key Lab Aerosol Chem & Phys, Inst Earth Environm, Xian 710061, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
RAY PHOTOELECTRON-SPECTROSCOPY; COKING WASTE-WATER; SUPERCRITICAL-WATER; HIGH-TEMPERATURE; CORROSION BEHAVIOR; AQUEOUS-SOLUTIONS; INORGANIC-COMPOUNDS; SALT PRECIPITATION; OXIDATION SYSTEMS; STAINLESS-STEELS;
D O I
10.1021/acs.jced.7b00436
中图分类号
O414.1 [热力学];
学科分类号
摘要
The solubility of sodium chloride was investigated by using a continuous flow method over the temperature and pressure ranges of (568 to 598) K and (10 to 25) MPa, respectively. The results showed that the solubility of sodium chloride increased with increasing water density. In general, over the low-density ranges, the increase of solubility is not significant. Whereas, over the high-density ranges, the solubility greatly increases with density. The experimental solubility data were also correlated with seven empirical and semiempirical models (empirical, enthalpy, Cp-, Flory-Huggins, ionization, second-order polynomial, and third-order polynomial models). The correlated results indicated that the second-order polynomial model provided the best fit. The solubility data of sodium chloride in sub-, near-, and supercritical water from this work and literature were collected with a view to evaluating the correlative and predictive capability of these models over a wide range. The enthalpy model gave the best correlated and predicted result with respect to the solubilities in near- and supercritical water. In the whole region, the third-order polynomial model was proven the most suitable model. Moreover, the corrosion behavior of the apparatus was characterized using scanning electron microscopy/energy dispersive X-ray spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy methods, and the possible corrosion mechanism is also briefly discussed.
引用
收藏
页码:3374 / 3390
页数:17
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