The Li₄SiO₄ sorbent is considered one of the most promising CO₂ acceptor materials at high temperatures, but it has the disadvantage of poor CO₂ capture performance due to aggregation. In this study, a novel lithium silicate-based sorbent containing both Li₄SiO₄ phase and Li₂SiO₃ phase was developed to overcome the decrease of CO₂ capture capacity of the sorbent for CO₂ capture in the high temperature range of 550–700 °C. This sorbent was simply prepared by physical mixing of Li₂CO₃ and SiO₂ (Ludox®) in a 1.8:1 M ratio. The effect of the developed lithium silicate-based sorbent on CO₂ capture was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and temperature-programmed desorption (TPD) analysis. The novel lithium silicate-based sorbent exhibited a high CO₂ capture capacity (∼250 mg CO₂/g sorbent) during multiple cycles at a regeneration temperature of 700 °C. In addition, we found that the CO₂ capture performance was affected by Li₂SiO₃ phase in the lithium silicate-based sorbents. This is because the Li₂SiO₃ in the sorbent helps prevent growth of particle size and aggregation.

Li ₄ SiO ₄吸附剂被认为是高温下最有希望的CO ₂受体材料之一，但是由于聚集，它具有劣质的CO ₂捕集性能的缺点。在这项研究中，开发了一种新型的同时包含Li ₄ SiO ₄相和Li ₂ SiO ₃相的硅酸锂基吸附剂，以克服吸附剂在550–500高温范围内对CO ₂捕集的CO ₂捕集能力的降低。700℃。通过物理混合Li ₂ CO ₃和SiO _2可以简单地制备这种吸附剂（Ludox®）的比例为1.8：1M。通过X射线衍射（XRD），扫描电子显微镜（SEM）和程序升温脱附（TPD）分析来表征已开发的硅酸锂基吸附剂对CO ₂捕集的影响。新型硅酸锂基吸附剂在700℃的再生温度下的多个循环中均表现出较高的CO ₂捕集能力（约250 mg CO ₂ / g吸附剂）。此外，我们发现在硅酸锂基吸附剂中，Li ₂ SiO ₃相影响了CO _2的捕集性能。这是因为吸附剂中的Li ₂ SiO ₃有助于防止粒径增长和聚集。