Abstract
Metal organic framework material, MIL-101(Cr), synthesized by hydrothermal method was granulated using starch and sodium salt of carboxyl methyl cellulose as binder. The equilibrium adsorption capacities of pure gases CO2, N2, CH4, and CO were measured at 288, 303 and 313K up to 850mm Hg on both powder and granules of MIL-101(Cr). The selectivity of CO2 over N2 in MIL-101(Cr) was found to be 12.6 at 303K, more than those for CO2 over CH4 (5.69) and CO (2.90). The CO2 dynamic adsorption studies from binary gas mixture (CO2+N2) with five different CO2 concentration in the range 5–50vol.%, and with two different feed gas flow rates (50 and 100mL/min), were carried out on MIL-101(Cr) granules. The regeneration of adsorbent was feasible at a relatively low temperature attributed to physical adsorption of CO2. The MIL-101(Cr) showed potential for CO2 adsorption compared with different types of carbon, silica and zeolite based adsorbents reported in the literature.
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