Abstract:

n-Propanol is widely used in different industries such as pharmaceutical manufacturing and agriculture. The thermophysical properties are the fundamentals for those processes. Viscosity is an important property which influences the design of process equipment, product quality monitoring and so on. However, the experimental data of viscosity are often obtained with discrete points. Correlating equations with these experimental data are prerequisite to use. To author's best knowledge, there is no such a viscosity correlation for n-propanol available in wide temperature and pressure ranges. The aim of this work is to develop the viscosity correlation of n-propanol with high accuracy, which can be used over the whole thermodynamic surface. Based on the selected reliable experimental data, the correlation for the viscosity of n-propanol was presented. The extrapolation behavior of the correlation is reasonable, and the temperature is valid from 150 to 400 K at pressures up to 120 MPa. The estimated uncertainties of this correlation are from 1% to 5%.

Key words: n-propanol, viscosity, model, thermodynamics

摘要：

正丙醇被广泛应用于化工、医药和农业等领域，可靠的热物性数据是理论研究和工程应用的基础。黏度作为流体重要的热物理性质之一，在生产流程的设计与优化和产品质量监测等方面具有重要意义。通过实验测量得到的黏度数据一般离散分布于不同的热力学状态，在工程中难以直接应用，因此，建立可靠的黏度方程以实现任意状态黏度的计算非常必要。经文献调研发现，目前缺少宽范围、高精度的正丙醇黏度方程，基于国内外已发表的实验数据开发了正丙醇高精度黏度方程。该方程不仅能够很好地复现实验数据，而且具有合理的外推性，其温度适用范围为150~400 K，压力适用范围为0.1~120 MPa，方程在计算范围内估计不确定度为1%~5%。

关键词: 正丙醇, 黏度, 模型, 热力学