Phase Equilibrium Study of the AlCl3–CaCl2–H2O System for the Production of Aluminum Chloride Hexahydrate from Ca-Rich Flue Ash
Phase Equilibrium Study of the AlCl3–CaCl2–H2O System for the Production of Aluminum Chloride Hexahydrate from Ca-Rich Flue Ash
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DOI：
10.1021/acs.jced.5b00603
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发表时间：
2016-01
影响因子：
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通讯作者：
Junfeng Wang;C. Petit;Xiangping Zhang;Shian Cui
中科院分区：
文献类型：
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作者：
Junfeng Wang;C. Petit;Xiangping Zhang;Shian Cui
AlCl3-CaCl2-H2O体系固液相平衡的研究对于从富钙粉煤灰与化工厂废盐酸反应所得渗滤液中分离六水氯化铝具有重要意义。测量了二元 AlCl3-H2O 体系和三元 AlCl3-CaCl2-H2O 体系在 278.15 K 至 363.15 K 温度范围内的相平衡数据。代表 AlCl3-CaCl2-H2O 系统的严格且热力学一致的模型，基于 Aspen Plus 中嵌入的 Pitzer 活度系数模型而开发。在此基础上，三元 AlCl3-CaCl2-H2O 体系在不同温度下的相行为在等边三角形上清晰可见。通过建模生成的相平衡图可以用来确定从含氯化钙溶液中回收 AlCl3·6H2O 的结晶过程。所有这些都将为铝的分离提供热力学基础......
The study of the solid–liquid phase equilibrium for the AlCl3–CaCl2–H2O system is of significance to separate aluminum chloride hexahydrate from the leachate obtained by the reaction of Ca-rich fly ash and a waste hydrochloride from chemical plant. The phase equilibrium data for the binary AlCl3–H2O system and the ternary AlCl3–CaCl2–H2O system over the temperature range from 278.15 K to 363.15 K were measured. A rigorous and thermodynamically consistent model representing the AlCl3–CaCl2–H2O system developed on the basis of the Pitzer’s activity coefficient model embedded in the Aspen Plus. On the basis of this, the phase behavior of the ternary AlCl3–CaCl2–H2O system at different temperatures was visualized with lucidity on an equilateral triangle. The phase-equilibrium diagram generated by modeling was illustrated to identify the course of crystallization to recover AlCl3·6H2O from the solutions containing calcium chloride. All of these will provide a thermodynamic basis for the separation of aluminum ...