Design of Stable Cage-like CaO/CaZrO3 Hollow Spheres for CO2 Capture

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• 作者：Yang Wang ; Wenyu Zhang ; Rui Li ; Wubiao Duan ; Bo Liu
• 刊名：Energy & Fuels
• 出版年：2016
• 出版时间：February 18, 2016
• 年：2016
• 卷：30
• 期：2
• 页码：1248-1255
• 全文大小：623K
• ISSN：1520-5029

文摘

This paper aims to solve the problem of the reversibility in carbonation/calcination cycles of Ca-based materials. The CaO/CaZrO₃ hollow sphere sorbents were prepared using colloidal carbon spheres as a template via the co-adsorption method. The hollow structure sorbents, which contained two kinds of metal ions, were observed by scanning electron microscopy and transmission electron microscopy images, and the components were obtained by X-ray diffraction and energy-dispersive X-ray analysis. The performances in CO₂ capture at different absorption temperatures, calcination temperatures, molar ratios of Ca/Zr, and heating rates compared to calcium oxide were investigated employing the thermogravimetric analyzer. The results showed that the CaO/CaZrO₃ sorbent could be fabricated using a trace Zr precursor and the specific prepared sorbent still could maintain a high capture capacity after exceeding a 12 000 min operation, which suggesting the approach that adsorbs both calcium and zirconium ions on the colloidal carbon spheres to form a hollow structure is feasible for enhancing the sintering-resistant properties.