摘要
The effects of solid-fluid interactions on the vapor-liquid phase diagram,coexistence density,relative volatility and vaporization enthalpy have been investigated for confined binary systems of CO 2-CH 4,CO 2-N 2 and CH 4-N 2.The Gibbs ensemble Monte Carlo(GEMC) simulation results indicate that the confinement and the solid-fluid interaction have significant influences on the vapor-liquid equilibrium properties.The confinement and the strength of the solid-fluid interaction make the p-x i phase diagram move to higher pressure regions.They also make the two-phase region become narrower for each binary mixture.The strength of the solid-fluid interactions can cause increases in the coexistence liquid and vapor densities,and cause the decrease of the relative volatility and the vaporization enthalpy for the systems studied.As the pore width is decreased,the two-phase region of the binary mixture becomes narrower.
The effects of solid-fluid interactions on the vapor-liquid phase diagram, coexistence density, relative volatility and vaporiza- tion enthalpy have been investigated for confined binary systems of CO2-CH4, CO2-N2 and CH4-N2. The Gibbs ensemble Monte Carlo （GEMC） simulation results indicate that the confinement and the solid-fluid interaction have significant influ- ences on the vapor-liquid equilibrium properties. The confinement and the strength of the solid-fluid interaction make the p-xi phase diagram move to higher pressure regions. They also make the two-phase region become narrower for each binary mix- ture. The strength of the solid-fluid interactions can cause increases in the coexistence liquid and vapor densities, and cause the decrease of the relative volatility and the vaporization enthalpy for the systems studied. As the pore width is decreased, the two-phase region of the binary mixture becomes narrower.
基金
supported by National Natural Science Foundation of China (20876083,20736003)
the Specialized Research Fund forthe Doctoral Program of Higher Education (20100002110024)
Major State Basic Research Program of China (2009CB623404)
