碳酸二乙酯在正庚烷和空气中质扩散系数测量

Measurement of mass diffusion coefficients of diethyl carbonate in heptane and in air

利用自行搭建的数字激光全息干涉法测量流体液液、气液质扩散系数的实验装置,在标准大气压下,温度在278.15—338.15 K内,测量了含氧替代燃料碳酸二乙酯分别在正庚烷和空气中21个温度点的质扩散系数;同时,使用Wilke-chang方程、Scheibel方程和Reddy-Doraiswamy方程对碳酸二乙酯在正庚烷中的质扩散系数进行了估算,并与实验数据进行了比较分析。为替代燃料碳酸二乙酯的科研开发提供了热物性基础数据。

The digital image holograph interferometry technique was used to measure the mass diffusion coefficient of liquid-liquid and gas-liquid fluids with self-built experimental set-up.The mass diffusion coefficients of diethyl carbonate were separately measured in heptane and in air at 21 different temperatures from 278.15 to 338.15 K under atmospheric pressure.The mass diffusion coefficients of diethyl carbonate in heptane were estimated by using Wilke-chang equation,Scheibel equation and Reddy-Doraiswamy equation,and the experimental results were compared with the values calculated by the equation.The study provides the basic thermophysical properties for the development of diethyl carbonate as fuel substitute.