Adsorption equilibrium isotherms of CO2

CH4 and N2 on zeolite 13X-APG were measured by Rubotherm magnetic suspension balance in the pressure range of 0—500 kPa at temperatures of 293

303

333 and 363 K.The multi-site Langmuir model and Sips model were used to fit the experimental data

and the model parameters were obtained by the non-linear regression.Furthermore

the adsorption capacities of CO2

CH4 and N2

as well as the separation factors of CO2/CH4

CO2/N2 and CH4/N2 gas mixtures on zeolite 13X-APG were compared with those on other materials reported in literature

including zeolites

activated carbon

mesoporous silica and metal-organic frameworks.The evaluation is given on the feasibility and efficiency of adsorption using 13X-APG as adsorbent to capture CH4 from both landfill gases and CO2 enhanced coal bed gases (CO2/CH4)

to capture CO2 from flue gases of coal-fired power plants

cement plants and coking plants (CO2/N2)

and to concentrate CH4 from coal mine gases (CH4/N2).