【作者】 阳书文； 于洁； 吕国强； 马文会； 王华；

【Author】 Yang Shuwen Yu Jie Lv Guoqiang Ma Wenhui Wang Hua National Engineering Laboratory for Vacuum Metallurgy,Faculty of Materials and Metallurgical Engineering,Kunming University of Science and Technology,Kunming 650093,China

【机构】 昆明理工大学材料与冶金工程学院真空冶金国家工程实验室；

【摘要】 以 SiO₂和 Li₂CO₃为反应原料,采用高温固相法于不同条件下合成了一系列可在500～750℃之间直接吸收 CO₂的硅酸锂（Li₄SiO₄）材料。实验结果表明,SiO₂与 Li₂CO₃的配比为1:2.3,球磨3 h 后在750℃下煅烧8 h 即可合成出吸收 CO₂ 性能良好的 Li₄SiO₄材料。在 CO₂气氛下,于600℃保持约30 min 即可达到吸收平衡,其吸收量达到30%（wt）以上。与文献报道相比,材料的合成条件有所改善,材料吸收 CO₂的容量也有较大提高。并采用 X 射线衍射初步研究了 Li₄SiO₄的吸附机制。更多还原

【Abstract】 Li₄SiO₄ as a CO₂ absorbent at 500℃ to 750℃ was synthesized by SiO₂ and Li₂CO₃.The results showed that Li₄SiO₄ with good ability of CO₂ absorption could be prepared under the optimum conditions:reaction temperature is 750℃,reaction time is 8 h,and SiO₂/Li₂CO₃ molar ratio is 1:2.3. Absorbing balance in CO₂ atmosphere could be arrived during 30 min at 600℃,and the absorption amount was above 30%（wt）.Compared with other related literature reports,the synthesis conditions were optimized and the absorption capacity was improved in this paper.Furthermore,the absorption mechanism of Li₄SiO₄ was primarily investigated by X-ray diffraction analysis.更多还原