Equilibrium isotherms studies for light hydrocarbons adsorption on 4A molecular sieve zeolite

Equilibrium adsorption isotherms were studied for pure methane, pure ethane, and methane, ethane, and propane mixture on 4A molecular sieve zeolite at 301 K. The constant-volume method was used for measuring the pure and the multi-component experimental equilibria data. Various isotherm models were utilized for correlation of pure and multi-component isotherm data. The pure component experimental data agreed well with the Langmuir and Freundlich equations. Both the extended Freundlich and modified extended Langmuir equations correlated the multi-component experimental data fairly well. The results of this study showed that ethane was more selectively adsorbed than methane on 4A molecular sieve zeolite, while propane was slowly adsorbed on this zeolite at the studied temperature.