Enhanced CO2 Chemisorption Properties of Li4SO4, Using a Water Hydration–Calcination Technique

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• 作者：Zeguang Yin ; Ke Wang ; Pengfei Zhao ; Xiaoli Tang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：February 3, 2016
• 年：2016
• 卷：55
• 期：4
• 页码：1142-1146
• 全文大小：335K
• ISSN：1520-5045

文摘

The water hydration and subsequent calcination (denoted as hydration–calcination) technique was used to modify the microstructure of lithium orthosilicate (Li₄SiO₄) prepared by solid-state reactions. The original and modified Li₄SiO₄ sorbents were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, nitrogen adsorption, scanning electron microscopy, and thermogravimetric analysis. The cyclic capacity of these sorbents was further examined using a dual fixed-bed reactor. After treatment by water hydration, most of the Li₄SiO₄ transformed into LiOH and Li₂SiO₃. Moreover, following subsequent calcination, the sample exhibited a looser structure with a smaller particle size compared with the original Li₄SiO₄. This favorable structure was responsible for improved CO₂ chemisorption properties, as measured by a higher capacity, faster absorption kinetics, and improved stability.