Investigation Of Adsorption And Desorption Process For Sulfur Dioxide Confined In Nano Tube

The investigation of phase behavior of fluids in nano-scaled materials is very important in the fields of chemical engineering, environmental engineering and material science.Interest increased rapidly in the phase transition and phase equilibria of fluids confined in nanopores and mesopores. In this thesis, the excess Helmholtz free energy functional is formulated in terms of a modified fundamental measuring theory (MFMT) for short ranged interactions and a first-order mean-spherical approximation(FMSA) theory for long ranged attractions. An equation of state that is applicable for both the uniform and non-uniform fluids is constructed and its applicability for the phase behavior of confined non-polar and associating fluids is confirmed by the simulation data. The molecular parameters for sulfur dioxide have been regressed by using the EOS and the corresponding experiment data for phase equilibria. Within the framework of density functional theory, the influences of concentration, temperature and the pore width of slit pores on the adsorption of SO₂ are studied and the optimized operation conditions for desulfurization via slit pores are determined.