以蛇纹石酸浸提镁残渣为硅源，碳酸锂为锂源，通过高温固相反应合成了硅酸锂高温固碳材料，探究了煅烧时间、气氛以及物料配比对合成材料高温固碳性能的影响。采用热重-差热综合热分析仪（TG-DTG）研究了蛇纹石酸浸提镁残渣型硅酸锂的CO2吸收性能，并通过扫描电子显微镜（SEM）与X射线衍射仪（XRD）对合成材料的微观形貌与结构特征进行了表征。结果表明：蛇纹石酸浸提镁残渣型硅酸锂具有较好的CO2吸收性能，吸收量可达26.66%；与市售SiO2为硅源相比，蛇纹石酸浸提镁残渣型硅酸锂材料煅烧合成时间缩短，高温固碳性能更优。%Using the residue of acid leaching serpentine after extracting magnesium as the silicon source, and lithium carbonate as the lithium source, lithium silicate, a kind of high-temperature carbon absorption material was synthesized through high temperature solid state reaction. The impact of calcining time, atmosphere and material ratio on the high-temperature carbon absorption properties of synthetic materials were studied in this paper. TG-DTG was applied to study the CO2 absorption properties of lithium silicate which is synthesized by the residue of serpentine after extracting magnesium by acid leaching, and the morphology and structure of synthetic materials were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results show that:lithium silicate synthesized by the residue of serpentine after extracting magnesium has good CO2 absorption capacity, which can be up to 26.66%. Compared with commercially SiO2 as the silicon source, lithium silicate prepared from the residue of serpentine after extracting magnesium has a lower calcination time, while a better high-temperature carbon sequestration performance.
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