Phase equilibria for the pseudo-ternary system (NaCl+Na2SO4+H2O) of coal gasification wastewater at T=(268.15 to 373.15) K

doi:10.1016/j.cjche.2016.08.016

›› 2017, Vol. 25 ›› Issue (7): 955-962.DOI: 10.1016/j.cjche.2016.08.016

• Chemical Engineering Thermodynamics • Previous Articles Next Articles

Phase equilibria for the pseudo-ternary system (NaCl+Na₂SO₄+H₂O) of coal gasification wastewater at T=(268.15 to 373.15) K

Haijiao Lu^1,2, Jingkang Wang^1,2, Jun Yu³, Yuefeng Wu³, Ting Wang^1,2, Ying Bao^1,2, Dou Ma³, Hongxun Hao^1,2

1 National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2 Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China;
3 East China Engineering Science and Technology Co., Ltd., Hefei 230024, China

Received:2016-06-21 Revised:2016-08-15 Online:2017-08-17 Published:2017-07-28
Supported by:
Supported by the National Key Research and Development Program of China (2016YFB0600504).

Phase equilibria for the pseudo-ternary system (NaCl+Na₂SO₄+H₂O) of coal gasification wastewater at T=(268.15 to 373.15) K

Haijiao Lu^1,2, Jingkang Wang^1,2, Jun Yu³, Yuefeng Wu³, Ting Wang^1,2, Ying Bao^1,2, Dou Ma³, Hongxun Hao^1,2

1 National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2 Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China;
3 East China Engineering Science and Technology Co., Ltd., Hefei 230024, China

通讯作者: Hongxun Hao,E-mail address:hongxunhao@tju.edu.cn
基金资助:
Supported by the National Key Research and Development Program of China (2016YFB0600504).

Abstract

Abstract: The pseudo-ternary system (NaCl + Na₂SO₄ + H₂O) of coal gasification wastewater was studied at T=(268.15 to 373.15) K. The solubility and density of the equilibrium liquid phase were determined by the isothermal solution saturation method. The equilibrium solids were also investigated by the Schreinemaker's method of wet residues and X-ray powder diffraction (XRD). According to the experimental data, the phase diagrams were determined. It was found that there was no significant solubility difference on the NaCl-rich side between the ternary system (NaCl + Na₂SO₄ + H₂O) in coal gasification wastewater and in pure water. However, the solubility on the Na₂SO₄-rich side of coal gasification wastewater was apparently higher than that of pure water. The increase in the solubility of Na₂SO₄ was most likely caused by the effects of other impurities apart from NaCl and Na₂SO₄ in coal gasification wastewater. The measured data and phase equilibrium diagrams can provide fundamental basis for salt recovery in coal gasification wastewater.

Key words: Pseudo-ternary system, Phase equilibria, Thermodynamics, Waste water, Recovery

摘要： The pseudo-ternary system (NaCl + Na₂SO₄ + H₂O) of coal gasification wastewater was studied at T=(268.15 to 373.15) K. The solubility and density of the equilibrium liquid phase were determined by the isothermal solution saturation method. The equilibrium solids were also investigated by the Schreinemaker's method of wet residues and X-ray powder diffraction (XRD). According to the experimental data, the phase diagrams were determined. It was found that there was no significant solubility difference on the NaCl-rich side between the ternary system (NaCl + Na₂SO₄ + H₂O) in coal gasification wastewater and in pure water. However, the solubility on the Na₂SO₄-rich side of coal gasification wastewater was apparently higher than that of pure water. The increase in the solubility of Na₂SO₄ was most likely caused by the effects of other impurities apart from NaCl and Na₂SO₄ in coal gasification wastewater. The measured data and phase equilibrium diagrams can provide fundamental basis for salt recovery in coal gasification wastewater.

关键词: Pseudo-ternary system, Phase equilibria, Thermodynamics, Waste water, Recovery

Haijiao Lu, Jingkang Wang, Jun Yu, Yuefeng Wu, Ting Wang, Ying Bao, Dou Ma, Hongxun Hao. Phase equilibria for the pseudo-ternary system (NaCl+Na₂SO₄+H₂O) of coal gasification wastewater at T=(268.15 to 373.15) K[J]. , 2017, 25(7): 955-962.

References

[1] W. Wang, H. Han, M. Yuan, H. Li, F. Fang, K. Wang, Treatment of coal gasification wastewater by a two-continuous UASB system with step-feed for COD and phenols removal, Bioresour. Technol. 102(2011) 5454-5460.
[2] Z. Wang, X. Xu, Z. Gong, F. Yang, Removal of COD, phenols and ammonium from Lurgi coal gasification wastewater using A²O-MBR system, J. Hazard. Mater. 235-236(2012) 78-84.
[3] Z. Yu, Y. Chen, D. Feng, Y. Qian, Process development, simulation, and industrial implementation of a new coal-gasification wastewater treatment installation for phenol and ammonia removal, Ind. Eng. Chem. Res. 49(2010) 2874-2881.
[4] W. Wang, H. Han, M. Yuan, H. Li, Enhanced anaerobic biodegradability of real coal gasification wastewater with methanol addition, J. Environ. Sci. 22(2010) 1868-1874.
[5] W. Shen, Y. Ren, T. Wang, C. Hai, Stable (solid + liquid) phase equilibrium for the ternary systems (K₂SO₄ + KH₂PO₄ + H₂O), (K₂SO₄ + KCl + H₂O) at T=313.15 K, J. Chem. Thermodyn. 90(2015) 15-23.
[6] C. Du, S. Zheng, H. Li, Y. Zhang, Solid-liquid equilibria of K₂CO₃ + K₂CrO₄ + H₂O system, J. Chem. Eng. Data 51(2006) 104-106.
[7] J. Hu, S. Sang, Q. Liu, Phase equilibria in the ternary systems KBr-MgBr₂-H₂O and NaBr-MgBr₂-H₂O at 348.15 K, Fluid Phase Equilibr. 392(2015) 127-131.
[8] S. Sang, Y. Hu, R. Cui, J. Hu, Y. Wang, Measurements of solid-liquid equilibria in the ternary system NaCl-NaBr-H₂O at 373 K, Russ. J. Phys. Chem. 89(2015) 1152-1157.
[9] H. Schott, A mathematical extrapolation for the method of wet residues, J. Chem. Eng. Data 3(1961) 324.
[10] Y. Su, B. Lu, X. Wang, Phase Diagram Analyses of Inorganic Chemical Production:Basic Theory, Chemical Industry Press, Beijing, 1985136-137.
[11] Z. Niu, F. Cheng, The Phase Diagram of Salt-Water System and its Application, second ed. Tianjin University Press, Tianjin, 2002.
[12] H. Stephen, T. Stephen, Solubilities of Inorganic and Organic Compounds, Pergamon Press Ltd., Oxford, 1979.

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Phase equilibria for the pseudo-ternary system (NaCl+Na₂SO₄+H₂O) of coal gasification wastewater at T=(268.15 to 373.15) K

Phase equilibria for the pseudo-ternary system (NaCl+Na₂SO₄+H₂O) of coal gasification wastewater at T=(268.15 to 373.15) K

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