【摘要】 针对目前CO2液态吸附剂能耗大、易挥发的问题,开发了介孔SiO₂/多乙烯多胺复合固态CO2吸附剂。通过使用磷酸作为造孔剂制备的SiO₂介孔材料,能够实现孔径在2⁶nm内连续调控。用介孔SiO₂吸附液态CO2吸附剂（多乙烯多胺）,可以显著提高气液接触面积,从而极大提高吸附效率。实验研究了吸附效率随多乙烯多胺质量分数的变化规律,分析了温度对吸附效果及再生效果的影响,揭示了再生效果随再生时间的变化规律。结果表明,制备的固态吸附剂能够100%吸收混合气体中的CO2,且当多乙烯多胺占介孔SiO₂的质量分数为20%、温度为60℃时,吸附剂对CO2的完全吸附效果达到最佳。更多还原

【Abstract】 Based on the fact that the conventional liquid adsorbents for CO₂ capture are usually energy-consuming and highly volatile,the solid-stateadsorbent was developed by mixing the mesoporous SiO₂ with polyethylene polyamine,where mesoporous SiO₂ was prepared by using phosphoric acid as pore-forming agent and the average pore size of the SiO₂ can be well controlled in the range of 2-6nm.Due to the huge specific area of the solid-state adsorbent,high CO₂-absorbing efficiency was achieved.The effect of adsorbent composition on adsorption efficiency was studied.And the impacts of temperature on CO₂ adsorption and regeneration as well as its evolution with time were also investigated.The results show thatCO₂ can be completely adsorbed.When the mass ratio of polyethylene polyamineto SiO₂ is 20% and the temperature is 60 ℃,the adsorbent shows the best CO₂ adsorption ability.更多还原