中文摘要：

采用不同硅源、锂源以湿磨法结合高温焙烧制备了纳米Li4 SiO4材料,利用X射线衍射（ XRD）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）表征了合成材料的结构和表面形貌,利用热重分析仪（TG）研究了Li4SiO4材料高温下的CO2吸收性能和循环使用稳定性。结果表明,湿磨法制备的Li4SiO4材料在550℃、2.5×104 Pa下,10 min可达吸收平衡,平衡吸收量为27.9%（质量分数）,经五次吸收-解吸后仍保持初始吸收性能,显示了良好的循环稳定性。将25%CO2-25%N2-50%He混合气通过Li4 SiO4材料床层,发现在550℃下,CO2能被高效捕集,在相对湿度为10%的水汽存在下,Li4 SiO4捕集CO2的性能没有明显下降。

英文摘要：

A wet ball-milling method followed by calcination was adopted to prepare nanocrystalline Li4 SiO4 materials by using different silicon and lithium sources. X-ray diffraction （ XRD） , scanning electron microscope （ SEM） and transmission electron microscope （ TEM） were applied to characterize the structure and morphology of the as-prepared Li4 SiO4 materials. CO2 uptakes and recycle stability of the prepared Li4 SiO4 materials were investigated on a thermogravity （TG） analyzer. Absorption equilibrium of 27. 9% was achieved within 10 min at 550℃ and CO2 partial pressure of 2. 5×104 Pa. The prepared nanocrystalline Li4SiO4 material kept the original absorption properties after 5 capture-regeneration cycles, indicating the good cycle stability. A mixture of 25%CO2-25% N2-50% He was introduced through the Li4 SiO4 absorption bed, showing that CO2 can be efficiently captured at 550℃. The adsorption capacity showed no significant decrease in the presence of 10% humidity.