Title :
Phase equilibrium model and partial molar volume calculation for dimethylformamide and CO2 binary mixture at high pressure
Author :
Kecun, Liu ; Lan, Zheng ; Yuqi, Wang ; Leilei, Hou ; Yafeng, Ma
Author_Institution :
Sch. of Chem. Eng., Northwest Univ., Xi´´an, China
Abstract :
A constant-volume visual cell was used to measure vapor-liquid phase equilibrium data of dimethylformamide in supercritical carbon dioxide from 323.2K to 353.2K. The phase equilibrium solubility was predicted by Peng-Robinson equation of state together with Vander Waals-2 mixing regulation. Partial molar volumes of vapor phase and liquid phase at equation state were evaluated from proposed model. The correlation between calculated values and the experimental data showed good agreement.
Keywords :
carbon compounds; density; equations of state; high-pressure effects; liquid-vapour transformations; organic compounds; phase equilibrium; solubility; CO2; Peng-Robinson equation of states; Vender Waals-2 mixing regulation; binary mixture; constant-volume visual cell; dimethylformamide; high pressure effects; partial molar volume calculation; phase equilibrium solubility; supercritical carbon dioxide; temperature 323.2 K to 353.2 K; vapor-liquid phase equilibrium model; Carbon; Chemicals; Educational institutions; Valves; Visualization; dimethylformamide; partial molar volume Introduction; phase equilibrium model; supercritical carbon dioxide;
Conference_Titel :
Materials for Renewable Energy & Environment (ICMREE), 2011 International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-61284-749-8
DOI :
10.1109/ICMREE.2011.5930613
