| 초록 |
Magnesia based adsorbents with Al2O3 and SiO2 (Mg/Al, Mg/Si molar ratio 3-5) supports further impregnated with (K, Li)NO3 eutectic mixture were synthesized for high temperature CO2 capture. The adsorbents are characterized by XRD, BET, SEM-EDX, TEM and thermogravimetric analysis. It was observed that, the excess of MgO present activated at the eutectic point and the carbonation was initiated. The effect of adsorption temperature, effective carbonation conversion and the optimum Mg/Al molar ratio to stabilize MgO for the effective regenarabilty during the high temperature CO2 adsorption-desorption were investigated in detail. Also, it was observed that with increasing molar ratio the adsorption performance was increased due to the excess of MgO present. Moreover, due to the presence of the basic MgAl2O4 and Mg2SiO4 phases, the enrichment of MgO towards CO2 attraction was observed. This work was supported by KCRC through the NRF funded by Ministry of Science, ICT, and Future Planning (NRF-2014M1A8A1049258) |
