东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2010, Vol. 31 ›› Issue (1): 92-95.DOI: -

• 论著 • 上一篇    下一篇

CaO在CaCl_2-CaO和等摩尔CaCl_2-NaCl-CaO熔盐中的溶解热力学

王淑兰;张福生;   

  1. 东北大学理学院;
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2010-01-15 发布日期:2013-06-20
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50674027)

Dissolution thermodynamics of CaO in CaCl2-CaO and equimolar CaCl2-NaCl-CaO

Wang, Shu-Lan (1); Zhang, Fu-Sheng (1)   

  1. (1) School of Sciences, Northeastern University, Shenyang 110004, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-01-15 Published:2013-06-20
  • Contact: Wang, S.-L.
  • About author:-
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摘要： 在923～1223K温度范围内,分别建立了CaCl2和等摩尔CaCl2-NaCl熔盐与固体CaO的两相平衡,采用化学法测量了CaO在CaCl2和CaCl2-NaCl中的溶解度,并通过相平衡规律,计算了CaO在熔盐中的活度系数、过剩溶解吉布斯自由能、焓和熵.在1123～1223K范围内,CaO在CaCl2中的溶解度介于14%～16%之间,高于其在CaCl2-NaCl中的溶解度.CaO在CaCl2中的活度系数小于在CaCl2-NaCl中的活度系数,表明CaO受CaCl2的吸引力大于CaCl2-NaCl的吸引力,CaO饱和的CaCl2-CaO熔盐行为接近规则溶液.通过线性拟合,得到了CaO在熔盐中的...

关键词: CaO, 溶解度, CaCl2, 过剩函数, 熔盐

Abstract: In the temperature range from 923 to 1223K, the two-phase equilibrium relationships between solid CaO, molten CaCl2 and CaCl2-NaCl were estabilished seperately. The solubilities of CaO in CaCl2 and equimolar CaCl2-NaCl were measured by chemical method and, according to the rules of phase equilibrium, the activity coefficient, excess Gibbs free energy, enthalpy and entropy of CaO in the saturated CaO molten salts were calculated. In the temperature range from 1123 to 1223K, the solubility of CaO in CaCl2 is between 14% and 16%, i.e., higher than that in CaCl2-NaCl. The activity coefficient of CaO in molten CaCl2 is smaller than that in CaCl2-NaCl, i.e., CaCl2 attracts CaO more than what CaCl2-NaCl does. The behavior of CaCl2-CaO where CaO is saturated is close to regular solution. The relationships between the solubility and activity coefficient of CaO in molten salts and temperature are obtained through linear fitting.

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