Activated carbon (AC) supported MgO (MgO@AC) for CO₂ capture has been facilely prepared with Mg(NO₃)₂ as precursor by a solid-state heat dispersion method. The prepared MgO@AC adsorbents with different magnesium loadings were characterized by X-ray diffraction (XRD), N₂ adsorption/desorption and scanning electron microscope (SEM), and were investigated for the CO₂ adsorption capacity, CO₂ adsorption selectivity and cyclic stability. The characterization results reveal that the precursor of Mg(NO₃)₂ can be highly dispersed on the surfaces of the AC support and converted to MgO during the activation process at high temperatures. The experimental results show that the MgO@AC adsorbent with the MgO loadings of 5 mmol/g AC support achieves a high CO₂ adsorption capacity, high CO₂/N₂ adsorption selectivity and excellent reversibility. Its good adsorption performance and facile fabrication process make it a promising adsorbent for CO₂ capture from flue gases. In addition, the isosteric heat of CO₂ adsorption on this adsorbent was calculated from the CO₂ adsorption equilibrium isotherms at different temperatures using the Clausius–Clapeyron equation, the values are in the range of 45.4–20.1 kJ/mol.

活性炭（AC）支持的MgO（氧化镁@ AC）用于CO ₂捕获已用Mg（NO被轻便制备₃）₂作为由固态热分散方法的前体。通过X射线衍射（XRD），N ₂吸附/脱附和扫描电子显微镜（SEM）对所制备的不同镁含量的MgO @ AC吸附剂进行表征，并研究了其对CO _2的吸附能力，CO _2的吸附选择性和循环性。稳定性。表征结果表明，Mg（NO ₃）₂的前驱体可以高度分散在AC载体的表面上，并在高温活化过程中转化为MgO。实验结果表明，MgO负载量为5 mmol / g AC载体时，MgO @ AC吸附剂具有较高的CO ₂吸附容量，高的CO ₂ / N ₂吸附选择性和优异的可逆性。其良好的吸附性能和便捷的制造工艺使其成为从烟气中捕获CO ₂的有前途的吸附剂。此外，CO的等量吸附热₂吸附在该吸附剂从CO计算出₂ 使用Clausius–Clapeyron方程在不同温度下的吸附平衡等温线，其值在45.4–20.1 kJ / mol的范围内。