Abstract
AbstractRod‐like MgO was prepared by the simple precipitation method and subsequently evaluated for CO2 capture efficiency under ambient‐temperature adsorption and intermediate‐temperature regeneration. The MgO precursor was analyzed by thermogravimetric analysis (TGA) and X‐ray power diffraction (XRD), it was decomposed completely at 500°C to form MgO. The as‐synthesized MgO samples were characterized by XRD, BET and FE‐SEM. The MgO samples were comprised of grains with an approximate length of 4‐6 μm and diameter of 0.5 μm. The BET surface area of MgO was 330.5 m2/g, which was much higher than that of commercial MgO (CM‐MgO, 103.2 m2/g). The CO2 uptake on MgO samples were evaluated by TGA. As‐synthesized MgO had the high CO2 sorption capacity compared to CM‐MgO. The effect of temperature on CO2 sorption capacity was also investigated. In addition, the stability of sample was evaluated by cyclic experiment.
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