Li<sub>4</sub>SiO<sub>4</sub> modification on the surface of amorphous silica porous body and CO<sub>2</sub> removal method characteristics

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  • Baek Su-Hyun
    Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
  • Inada Miki
    Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University Center of Advanced Instrumental Analysis, Kyushu University Department of Applied Chemistry, Faculty of Engineering, Kyushu University

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<p>Lithium silicate (Li4SiO4) is one of the most promising carbon dioxide (CO2) capture materials at high temperatures. In this study, Li4SiO4 on silica (SiO2) porous structure was tried to fabricate in solid state reaction for CO2 capture materials. Li2CO3 reacted with amorphous SiO2 on the surface of silica porous structure made by template method, resulting in the formation of Li4SiO4 porous structure on silica support at 800 °C. The obtained Li4SiO4 porous structure can capture CO2 at 600 °C and release it at 700 °C, and could be used stably and repeatedly. This Li4SiO4 porous structure is expected to be useful as a CO2 capture material at high temperature.</p>

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