Incorporation of Zr into Calcium Oxide for CO2 Capture by a Simple and Facile Sol–Gel Method

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• 作者：Hongxia Guo ; Shengping Wang ; Chun Li ; Yujun Zhao ; Qi Sun ; Xinbin Ma
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：July 27, 2016
• 年：2016
• 卷：55
• 期：29
• 页码：7873-7879
• 全文大小：624K
• 年卷期：0
• ISSN：1520-5045

文摘

A series of Zr-doped CaO-based sorbents were synthesized by a simple and facile sol–gel method, and sample of Ca/Zr (30:1) exhibited excellent CO₂ capture capacity (0.64 g CO₂/g sorbent) and favorable stability (up to 18 cycles). The performance of sorbent still remained stable when tested under a high decarbonation temperature of 900 °C. The structure–property relationship of the sorbents was explored by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscope (TEM), and N₂ physisorption measurement, respectively. The favorable CO₂ capture characteristics of CaO-based sorbents were attributed to the CaZrO₃ nanoparticles, which created an inert barrier preventing the sintering–agglomeration, the nanosize of the particles, optimized pore size distributions, and uniform distribution of Ca and Zr in the sorbent.