Effect of the Particle Size of Quartz Powder on the Synthesis and CO2 Absorption Properties of Li4SiO4 at High Temperature

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• 作者：Hongliang Xu ; Weigao Cheng ; Xiaozeng Jin ; Gaixian Wang ; Hongxia Lu ; Hailong Wang ; Deliang Chen ; Bingbing Fan ; Tiecui Hou ; Rui Zhang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：February 6, 2013
• 年：2013
• 卷：52
• 期：5
• 页码：1886-1891
• 全文大小：336K
• 年卷期：v.52,no.5(February 6, 2013)
• ISSN：1520-5045

文摘

Li₄SiO₄ was obtained by using quartz powder of different particle sizes (75鈥?80 渭m, 45鈥?5 渭m, 38鈥?5 渭m, and <38 渭m) and Li₂CO₃ as raw materials through a solid-state reaction at 720 掳C. X-ray diffraction (XRD), scanning electron microscopy (SEM), and differential thermal analysis and thermogravimetry (DTA/TG) were used to examine the sintering behavior and properties of the samples. The results indicated that when the particle size of the quartz powder decreased, the solid-state reaction performed more completely, the content of the Li₄SiO₄ phase increased, and the size of the grain agglomerates decreased gradually. The enhanced chemical reactivity of the quartz powder with Li₂CO₃ and the shortened diffusion distance as the quartz size decreases are helpful to the formation of the Li₄SiO₄ phase. The sorption analysis revealed that the samples synthesized using the quartz powder with smaller particle sizes experienced a more rapid absorption鈥揹esorption process with a higher absorption efficiency.