Adsorption equilibrium and diffusion of CO2 on microporous metal-organic frameworks (MOF-5, or IRMOF- 1) crystals were experimentally studied by the gravimetric method in the pressure range up to 1 atm. The MOF-5 crystal cubes of about 40-60 μm in sizes were synthesized by the solvothermal method. Freundlich adsorption isotherm equation can fit well CO2 adsorption isotherms on MOF-5, with isosteric heat of adsorption of about 34 kJ/mol. Diffusion coefficient of CO2 in the MOF-5 is in the range of 8.1-11.5 × 10-9 cm2/s in 295-331K with activation energy of 7.61 kJ/mol. MOF-5 offers attractive adsorption properties as an adsorbent for separation of CO2 from flue gas.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering