| 高温下硅酸锂吸收CO2的研究 |
| CO2 Absorption of Li4SiO4 at High Temperature |
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| 摘要: 以SiO2和Li2CO3为反应原料，采用高温固相法于不同温度下合成了一系列可在高温500~750 ℃之间直接吸收CO2的硅酸锂(Li4SiO4)材料。采用扫描电子显微镜(SEM)、X射线粉末衍射仪(XRD)分别观察和评价了合成材料的表面形貌与结构特征，用热重分析仪(TG)研究了硅酸锂材料吸收CO2的性能。实验结果表明，在750 ℃下煅烧6 h即可合成出吸收CO2性能良好的硅酸锂材料，在CO2气氛下，于700 ℃保持约15 min即可达到吸收平衡，其吸收量约达43%(wt)左右。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。 |
| 关键词: 硅酸锂 吸收 CO2 |
| 基金项目: |
| Abstract: Li4SiO4 used as a CO2 absorbent at 500 ℃ to 750 ℃ was synthesized by
SiO2 and Li2CO3. The crystal structure and microstructure of
Li4SiO4 materials were characterized by XRD and SEM, respectively, and the
CO2-absorption ability of the Li4SiO4 materials was studied by TG. The results showed that
Li4SiO4 with good ability of CO2 absorption could be prepared at 750 ℃ for 6 h. The absorbing balance in
CO2 atmosphere could be arrived during 15 min at 700 ℃, and the absorption amount was about 43%(wt). The synthesis conditions were optimized and the absorption capacity was improved as compared to literature methods. |
| Keywords: lithium silicate absorption carbon dioxide |
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| 王银杰,其鲁,江卫军.高温下硅酸锂吸收CO2的研究[J].无机化学学报,2006,22(2):268-272. |
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