非电解质水溶液黏度的关联

Correlation of Viscosity of Aqueous Non-Electrolyte Solutions

许多化工过程的设计需要估算含水体系的黏度,但目前的黏度关联方法用于含水体系时误差较大。今以作者所在课题组近期提出的非水液体混合物黏度关联方程为基础,通过引入形状因子,得出了一个非电解质水溶液的黏度方程。该方程可用于二元非电解质水溶液黏度的关联,且能利用二元黏度得到的关联参数推算三元非电解质水溶液的黏度。该方程对54个二元非电解质水溶液体系黏度(总计2876个黏度数据点)关联的总平均相对偏差为4.60%;对7个三元非电解质水溶液体系黏度(总计352个黏度数据点)推算的总平均相对偏差为3.75%。结果表明,该方程具有较高的关联精度和推算精度。

The viscosity estimation for aqueous solution is required in the design of many chemical processes.However,the estimation results obtained by using the methods available in the literatures are usually not satisfactory.In this paper,the shape factor was introduced to the viscosity correlation equation for the non-aqueous liquid mixtures,which was developed recently by our group,and a new viscosity equation for aqueous non-electrolyte solutions was obtained.The new equation could be used not only for the correlation of viscosity of binary aqueous non-electrolyte solutions,but also for the viscosity estimation of ternary aqueous non-electrolyte solutions by using the equation parameters correlated from binary mixtures.54 binary aqueous non-electrolyte solution systems with 2876 viscosity data points were correlated by using this new equation,and the total average absolute deviation of the correlation is 4.60%.Furthermore,7 ternary aqueous non-electrolyte solution systems with 352 viscosity data points were also estimated by using the new equation with the total average absolute deviation of 3.75%.The results indicate that this new equation is adequate for correlating the viscosity of binary aqueous non-electrolyte solutions and for estimating the viscosity of ternary aqueous non-electrolyte solutions.