摘要
根据对应状态原理的基本思想本文提出了一种预测电解质溶液密度的新方法。以CaCl2 溶液作为参考流体 ,本文得到了溶液渗透压和溶剂水的表观摩尔体积的定量关系。假定该关系对所有电解质水溶液都是适用的 ,则由离子半径和溶液组成 ,就可以计算单一电解质溶液和预测混合电解质溶液在全浓度和 2 73K～ 373K范围内的密度。模型的可靠性通过 30个二元电解质溶液在 2 98 1 5K和 1 1个单一电解质溶液在 2 73K～ 373 1 5K范围内密度的预测进行了检验。采用与温度和浓度无关的离子半径的优化值 ,本文对密度预测的总平均相对偏差小于 1 %。该方法公式简单 。
A new generalized model was proposed for predicting density of electrolyte solutions by using the principle of corresponding state.Taking CaCl\-2 solution as reference fluid,the quantitative relation between apparent molar volume of water and osmotic pressure of the solution was obtained.With this universal relation for all the electrolyte solution and the known ionic radill,densities of single or mixed electrolyte solutions in the whole concentration range and in the temperature range of 271\^15K～373\^15K can be predicted.The validity of the proposed model was investigated for 30 binary electrolyte solutions at 298\^15K,and for 11 single electrolyte solutions in the temperature range of 273\^15K～373\^15K.Using the optimized ionic radius being independent of temperature and concentration the AADs were found to be within 1%.This method is simple for use and the prediction accuracy is within the demand for industry design.
出处
《化学工业与工程》
CAS
2001年第1期20-28,共9页
Chemical Industry and Engineering
关键词
模型
渗透压
电解质溶液
密度
预测
model
osmotic pressure
electrolyte solutions
density
prediction
